contrib/sendmail/src/main.c

   1 /*
   2  * Copyright (c) 1998-2006, 2008, 2009, 2011 Sendmail, Inc. and its suppliers.
   3  *      All rights reserved.
   4  * Copyright (c) 1983, 1995-1997 Eric P. Allman.  All rights reserved.
   5  * Copyright (c) 1988, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * By using this file, you agree to the terms and conditions set
   9  * forth in the LICENSE file which can be found at the top level of
  10  * the sendmail distribution.
  11  *
  12  */
  13
  14 #define _DEFINE
  15 #include <sendmail.h>
  16 #include <sm/sendmail.h>
  17 #include <sm/xtrap.h>
  18 #include <sm/signal.h>
  19
  20 #ifndef lint
  21 SM_UNUSED(static char copyright[]) =
  22 "@(#) Copyright (c) 1998-2003 Sendmail, Inc. and its suppliers.\n\
  23         All rights reserved.\n\
  24      Copyright (c) 1983, 1995-1997 Eric P. Allman.  All rights reserved.\n\
  25      Copyright (c) 1988, 1993\n\
  26         The Regents of the University of California.  All rights reserved.\n";
  27 #endif /* ! lint */
  28
  29 SM_RCSID("@(#)$Id: main.c,v 8.981 2012/06/14 23:54:02 ca Exp $")
  30
  31
  32 #if NETINET || NETINET6
  33 # include <arpa/inet.h>
  34 #endif /* NETINET || NETINET6 */
  35
  36 /* for getcfname() */
  37 #include <sendmail/pathnames.h>
  38
  39 static SM_DEBUG_T
  40 DebugNoPRestart = SM_DEBUG_INITIALIZER("no_persistent_restart",
  41         "@(#)$Debug: no_persistent_restart - don't restart, log only $");
  42
  43 static void     dump_class __P((STAB *, int));
  44 static void     obsolete __P((char **));
  45 static void     testmodeline __P((char *, ENVELOPE *));
  46 static char     *getextenv __P((const char *));
  47 static void     sm_printoptions __P((char **));
  48 static SIGFUNC_DECL     intindebug __P((int));
  49 static SIGFUNC_DECL     sighup __P((int));
  50 static SIGFUNC_DECL     sigpipe __P((int));
  51 static SIGFUNC_DECL     sigterm __P((int));
  52 #ifdef SIGUSR1
  53 static SIGFUNC_DECL     sigusr1 __P((int));
  54 #endif /* SIGUSR1 */
  55
  56 /*
  57 **  SENDMAIL -- Post mail to a set of destinations.
  58 **
  59 **      This is the basic mail router.  All user mail programs should
  60 **      call this routine to actually deliver mail.  Sendmail in
  61 **      turn calls a bunch of mail servers that do the real work of
  62 **      delivering the mail.
  63 **
  64 **      Sendmail is driven by settings read in from /etc/mail/sendmail.cf
  65 **      (read by readcf.c).
  66 **
  67 **      Usage:
  68 **              /usr/lib/sendmail [flags] addr ...
  69 **
  70 **              See the associated documentation for details.
  71 **
  72 **      Authors:
  73 **              Eric Allman, UCB/INGRES (until 10/81).
  74 **                           Britton-Lee, Inc., purveyors of fine
  75 **                              database computers (11/81 - 10/88).
  76 **                           International Computer Science Institute
  77 **                              (11/88 - 9/89).
  78 **                           UCB/Mammoth Project (10/89 - 7/95).
  79 **                           InReference, Inc. (8/95 - 1/97).
  80 **                           Sendmail, Inc. (1/98 - present).
  81 **              The support of my employers is gratefully acknowledged.
  82 **                      Few of them (Britton-Lee in particular) have had
  83 **                      anything to gain from my involvement in this project.
  84 **
  85 **              Gregory Neil Shapiro,
  86 **                      Worcester Polytechnic Institute (until 3/98).
  87 **                      Sendmail, Inc. (3/98 - present).
  88 **
  89 **              Claus Assmann,
  90 **                      Sendmail, Inc. (12/98 - present).
  91 */
  92
  93 char            *FullName;      /* sender's full name */
  94 ENVELOPE        BlankEnvelope;  /* a "blank" envelope */
  95 static ENVELOPE MainEnvelope;   /* the envelope around the basic letter */
  96 ADDRESS         NullAddress =   /* a null address */
  97                 { "", "", NULL, "" };
  98 char            *CommandLineArgs;       /* command line args for pid file */
  99 bool            Warn_Q_option = false;  /* warn about Q option use */
 100 static int      MissingFds = 0; /* bit map of fds missing on startup */
 101 char            *Mbdb = "pw";   /* mailbox database defaults to /etc/passwd */
 102
 103 #ifdef NGROUPS_MAX
 104 GIDSET_T        InitialGidSet[NGROUPS_MAX];
 105 #endif /* NGROUPS_MAX */
 106
 107 #define MAXCONFIGLEVEL  10      /* highest config version level known */
 108
 109 #if SASL
 110 static sasl_callback_t srvcallbacks[] =
 111 {
 112         {       SASL_CB_VERIFYFILE,     &safesaslfile,  NULL    },
 113         {       SASL_CB_PROXY_POLICY,   &proxy_policy,  NULL    },
 114         {       SASL_CB_LIST_END,       NULL,           NULL    }
 115 };
 116 #endif /* SASL */
 117
 118 unsigned int    SubmitMode;
 119 int             SyslogPrefixLen; /* estimated length of syslog prefix */
 120 #define PIDLEN          6       /* pid length for computing SyslogPrefixLen */
 121 #ifndef SL_FUDGE
 122 # define SL_FUDGE       10      /* fudge offset for SyslogPrefixLen */
 123 #endif /* ! SL_FUDGE */
 124 #define SLDLL           8       /* est. length of default syslog label */
 125
 126
 127 /* Some options are dangerous to allow users to use in non-submit mode */
 128 #define CHECK_AGAINST_OPMODE(cmd)                                       \
 129 {                                                                       \
 130         if (extraprivs &&                                               \
 131             OpMode != MD_DELIVER && OpMode != MD_SMTP &&                \
 132             OpMode != MD_ARPAFTP && OpMode != MD_CHECKCONFIG &&         \
 133             OpMode != MD_VERIFY && OpMode != MD_TEST)                   \
 134         {                                                               \
 135                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,          \
 136                                      "WARNING: Ignoring submission mode -%c option (not in submission mode)\n", \
 137                        (cmd));                                          \
 138                 break;                                                  \
 139         }                                                               \
 140         if (extraprivs && queuerun)                                     \
 141         {                                                               \
 142                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,          \
 143                                      "WARNING: Ignoring submission mode -%c option with -q\n", \
 144                        (cmd));                                          \
 145                 break;                                                  \
 146         }                                                               \
 147 }
 148
 149 int
 150 main(argc, argv, envp)
 151         int argc;
 152         char **argv;
 153         char **envp;
 154 {
 155         register char *p;
 156         char **av;
 157         extern char Version[];
 158         char *ep, *from;
 159         STAB *st;
 160         register int i;
 161         int j;
 162         int dp;
 163         int fill_errno;
 164         int qgrp = NOQGRP;              /* queue group to process */
 165         bool safecf = true;
 166         BITMAP256 *p_flags = NULL;      /* daemon flags */
 167         bool warn_C_flag = false;
 168         bool auth = true;               /* whether to set e_auth_param */
 169         char warn_f_flag = '\0';
 170         bool run_in_foreground = false; /* -bD mode */
 171         bool queuerun = false, debug = false;
 172         struct passwd *pw;
 173         struct hostent *hp;
 174         char *nullserver = NULL;
 175         char *authinfo = NULL;
 176         char *sysloglabel = NULL;       /* label for syslog */
 177         char *conffile = NULL;          /* name of .cf file */
 178         char *queuegroup = NULL;        /* queue group to process */
 179         char *quarantining = NULL;      /* quarantine queue items? */
 180         bool extraprivs;
 181         bool forged, negate;
 182         bool queuepersistent = false;   /* queue runner process runs forever */
 183         bool foregroundqueue = false;   /* queue run in foreground */
 184         bool save_val;                  /* to save some bool var. */
 185         int cftype;                     /* which cf file to use? */
 186         SM_FILE_T *smdebug;
 187         static time_t starttime = 0;    /* when was process started */
 188         struct stat traf_st;            /* for TrafficLog FIFO check */
 189         char buf[MAXLINE];
 190         char jbuf[MAXHOSTNAMELEN];      /* holds MyHostName */
 191         static char rnamebuf[MAXNAME];  /* holds RealUserName */
 192         char *emptyenviron[1];
 193 #if STARTTLS
 194         bool tls_ok;
 195 #endif /* STARTTLS */
 196         QUEUE_CHAR *new;
 197         ENVELOPE *e;
 198         extern int DtableSize;
 199         extern int optind;
 200         extern int opterr;
 201         extern char *optarg;
 202         extern char **environ;
 203 #if SASL
 204         extern void sm_sasl_init __P((void));
 205 #endif /* SASL */
 206
 207 #if USE_ENVIRON
 208         envp = environ;
 209 #endif /* USE_ENVIRON */
 210
 211         /* turn off profiling */
 212         SM_PROF(0);
 213
 214         /* install default exception handler */
 215         sm_exc_newthread(fatal_error);
 216
 217         /* set the default in/out channel so errors reported to screen */
 218         InChannel = smioin;
 219         OutChannel = smioout;
 220
 221         /*
 222         **  Check to see if we reentered.
 223         **      This would normally happen if e_putheader or e_putbody
 224         **      were NULL when invoked.
 225         */
 226
 227         if (starttime != 0)
 228         {
 229                 syserr("main: reentered!");
 230                 abort();
 231         }
 232         starttime = curtime();
 233
 234         /* avoid null pointer dereferences */
 235         TermEscape.te_rv_on = TermEscape.te_under_on = TermEscape.te_normal = "";
 236
 237         RealUid = getuid();
 238         RealGid = getgid();
 239
 240         /* Check if sendmail is running with extra privs */
 241         extraprivs = (RealUid != 0 &&
 242                       (geteuid() != getuid() || getegid() != getgid()));
 243
 244         CurrentPid = getpid();
 245
 246         /* get whatever .cf file is right for the opmode */
 247         cftype = SM_GET_RIGHT_CF;
 248
 249         /* in 4.4BSD, the table can be huge; impose a reasonable limit */
 250         DtableSize = getdtsize();
 251         if (DtableSize > 256)
 252                 DtableSize = 256;
 253
 254         /*
 255         **  Be sure we have enough file descriptors.
 256         **      But also be sure that 0, 1, & 2 are open.
 257         */
 258
 259         /* reset errno and fill_errno; the latter is used way down below */
 260         errno = fill_errno = 0;
 261         fill_fd(STDIN_FILENO, NULL);
 262         if (errno != 0)
 263                 fill_errno = errno;
 264         fill_fd(STDOUT_FILENO, NULL);
 265         if (errno != 0)
 266                 fill_errno = errno;
 267         fill_fd(STDERR_FILENO, NULL);
 268         if (errno != 0)
 269                 fill_errno = errno;
 270
 271         sm_closefrom(STDERR_FILENO + 1, DtableSize);
 272         errno = 0;
 273         smdebug = NULL;
 274
 275 #if LOG
 276 # ifndef SM_LOG_STR
 277 #  define SM_LOG_STR    "sendmail"
 278 # endif /* ! SM_LOG_STR */
 279 #  ifdef LOG_MAIL
 280         openlog(SM_LOG_STR, LOG_PID, LOG_MAIL);
 281 #  else /* LOG_MAIL */
 282         openlog(SM_LOG_STR, LOG_PID);
 283 #  endif /* LOG_MAIL */
 284 #endif /* LOG */
 285
 286         /*
 287         **  Seed the random number generator.
 288         **  Used for queue file names, picking a queue directory, and
 289         **  MX randomization.
 290         */
 291
 292         seed_random();
 293
 294         /* do machine-dependent initializations */
 295         init_md(argc, argv);
 296
 297
 298         SyslogPrefixLen = PIDLEN + (MAXQFNAME - 3) + SL_FUDGE + SLDLL;
 299
 300         /* reset status from syserr() calls for missing file descriptors */
 301         Errors = 0;
 302         ExitStat = EX_OK;
 303
 304         SubmitMode = SUBMIT_UNKNOWN;
 305 #if _FFR_LOCAL_DAEMON
 306         LocalDaemon = false;
 307 # if NETINET6
 308         V6LoopbackAddrFound = false;
 309 # endif /* NETINET6 */
 310 #endif /* _FFR_LOCAL_DAEMON */
 311 #if XDEBUG
 312         checkfd012("after openlog");
 313 #endif /* XDEBUG */
 314
 315         tTsetup(tTdvect, sizeof(tTdvect), "0-99.1,*_trace_*.1");
 316
 317 #ifdef NGROUPS_MAX
 318         /* save initial group set for future checks */
 319         i = getgroups(NGROUPS_MAX, InitialGidSet);
 320         if (i <= 0)
 321         {
 322                 InitialGidSet[0] = (GID_T) -1;
 323                 i = 0;
 324         }
 325         while (i < NGROUPS_MAX)
 326                 InitialGidSet[i++] = InitialGidSet[0];
 327 #endif /* NGROUPS_MAX */
 328
 329         /* drop group id privileges (RunAsUser not yet set) */
 330         dp = drop_privileges(false);
 331         setstat(dp);
 332
 333 #ifdef SIGUSR1
 334         /* Only allow root (or non-set-*-ID binaries) to use SIGUSR1 */
 335         if (!extraprivs)
 336         {
 337                 /* arrange to dump state on user-1 signal */
 338                 (void) sm_signal(SIGUSR1, sigusr1);
 339         }
 340         else
 341         {
 342                 /* ignore user-1 signal */
 343                 (void) sm_signal(SIGUSR1, SIG_IGN);
 344         }
 345 #endif /* SIGUSR1 */
 346
 347         /* initialize for setproctitle */
 348         initsetproctitle(argc, argv, envp);
 349
 350         /* Handle any non-getoptable constructions. */
 351         obsolete(argv);
 352
 353         /*
 354         **  Do a quick prescan of the argument list.
 355         */
 356
 357
 358         /* find initial opMode */
 359         OpMode = MD_DELIVER;
 360         av = argv;
 361         p = strrchr(*av, '/');
 362         if (p++ == NULL)
 363                 p = *av;
 364         if (strcmp(p, "newaliases") == 0)
 365                 OpMode = MD_INITALIAS;
 366         else if (strcmp(p, "mailq") == 0)
 367                 OpMode = MD_PRINT;
 368         else if (strcmp(p, "smtpd") == 0)
 369                 OpMode = MD_DAEMON;
 370         else if (strcmp(p, "hoststat") == 0)
 371                 OpMode = MD_HOSTSTAT;
 372         else if (strcmp(p, "purgestat") == 0)
 373                 OpMode = MD_PURGESTAT;
 374
 375 #if defined(__osf__) || defined(_AIX3)
 376 # define OPTIONS        "A:B:b:C:cD:d:e:F:f:Gh:IiL:M:mN:nO:o:p:Q:q:R:r:sTtV:vX:x"
 377 #endif /* defined(__osf__) || defined(_AIX3) */
 378 #if defined(sony_news)
 379 # define OPTIONS        "A:B:b:C:cD:d:E:e:F:f:Gh:IiJ:L:M:mN:nO:o:p:Q:q:R:r:sTtV:vX:"
 380 #endif /* defined(sony_news) */
 381 #ifndef OPTIONS
 382 # define OPTIONS        "A:B:b:C:cD:d:e:F:f:Gh:IiL:M:mN:nO:o:p:Q:q:R:r:sTtV:vX:"
 383 #endif /* ! OPTIONS */
 384
 385         /* Set to 0 to allow -b; need to check optarg before using it! */
 386         opterr = 0;
 387         while ((j = getopt(argc, argv, OPTIONS)) != -1)
 388         {
 389                 switch (j)
 390                 {
 391                   case 'b':     /* operations mode */
 392                         j = (optarg == NULL) ? ' ' : *optarg;
 393                         switch (j)
 394                         {
 395                           case MD_DAEMON:
 396                           case MD_FGDAEMON:
 397                           case MD_SMTP:
 398                           case MD_INITALIAS:
 399                           case MD_DELIVER:
 400                           case MD_VERIFY:
 401                           case MD_TEST:
 402                           case MD_PRINT:
 403                           case MD_PRINTNQE:
 404                           case MD_HOSTSTAT:
 405                           case MD_PURGESTAT:
 406                           case MD_ARPAFTP:
 407 #if _FFR_CHECKCONFIG
 408                           case MD_CHECKCONFIG:
 409 #endif /* _FFR_CHECKCONFIG */
 410                                 OpMode = j;
 411                                 break;
 412
 413 #if _FFR_LOCAL_DAEMON
 414                           case MD_LOCAL:
 415                                 OpMode = MD_DAEMON;
 416                                 LocalDaemon = true;
 417                                 break;
 418 #endif /* _FFR_LOCAL_DAEMON */
 419
 420                           case MD_FREEZE:
 421                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
 422                                                      "Frozen configurations unsupported\n");
 423                                 return EX_USAGE;
 424
 425                           default:
 426                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
 427                                                      "Invalid operation mode %c\n",
 428                                                      j);
 429                                 return EX_USAGE;
 430                         }
 431                         break;
 432
 433                   case 'D':
 434                         if (debug)
 435                         {
 436                                 errno = 0;
 437                                 syserr("-D file must be before -d");
 438                                 ExitStat = EX_USAGE;
 439                                 break;
 440                         }
 441                         dp = drop_privileges(true);
 442                         setstat(dp);
 443                         smdebug = sm_io_open(SmFtStdio, SM_TIME_DEFAULT,
 444                                             optarg, SM_IO_APPEND, NULL);
 445                         if (smdebug == NULL)
 446                         {
 447                                 syserr("cannot open %s", optarg);
 448                                 ExitStat = EX_CANTCREAT;
 449                                 break;
 450                         }
 451                         sm_debug_setfile(smdebug);
 452                         break;
 453
 454                   case 'd':
 455                         debug = true;
 456                         tTflag(optarg);
 457                         (void) sm_io_setvbuf(sm_debug_file(), SM_TIME_DEFAULT,
 458                                              (char *) NULL, SM_IO_NBF,
 459                                              SM_IO_BUFSIZ);
 460                         break;
 461
 462                   case 'G':     /* relay (gateway) submission */
 463                         SubmitMode = SUBMIT_MTA;
 464                         break;
 465
 466                   case 'L':
 467                         if (optarg == NULL)
 468                         {
 469                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
 470                                                      "option requires an argument -- '%c'",
 471                                                      (char) j);
 472                                 return EX_USAGE;
 473                         }
 474                         j = SM_MIN(strlen(optarg), 32) + 1;
 475                         sysloglabel = xalloc(j);
 476                         (void) sm_strlcpy(sysloglabel, optarg, j);
 477                         SyslogPrefixLen = PIDLEN + (MAXQFNAME - 3) +
 478                                           SL_FUDGE + j;
 479                         break;
 480
 481                   case 'Q':
 482                   case 'q':
 483                         /* just check if it is there */
 484                         queuerun = true;
 485                         break;
 486                 }
 487         }
 488         opterr = 1;
 489
 490         /* Don't leak queue information via debug flags */
 491         if (extraprivs && queuerun && debug)
 492         {
 493                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
 494                                      "WARNING: Can not use -d with -q.  Disabling debugging.\n");
 495                 sm_debug_close();
 496                 sm_debug_setfile(NULL);
 497                 (void) memset(tTdvect, '\0', sizeof(tTdvect));
 498         }
 499
 500 #if LOG
 501         if (sysloglabel != NULL)
 502         {
 503                 /* Sanitize the string */
 504                 for (p = sysloglabel; *p != '\0'; p++)
 505                 {
 506                         if (!isascii(*p) || !isprint(*p) || *p == '%')
 507                                 *p = '*';
 508                 }
 509                 closelog();
 510 #  ifdef LOG_MAIL
 511                 openlog(sysloglabel, LOG_PID, LOG_MAIL);
 512 #  else /* LOG_MAIL */
 513                 openlog(sysloglabel, LOG_PID);
 514 #  endif /* LOG_MAIL */
 515         }
 516 #endif /* LOG */
 517
 518         /* set up the blank envelope */
 519         BlankEnvelope.e_puthdr = putheader;
 520         BlankEnvelope.e_putbody = putbody;
 521         BlankEnvelope.e_xfp = NULL;
 522         STRUCTCOPY(NullAddress, BlankEnvelope.e_from);
 523         CurEnv = &BlankEnvelope;
 524         STRUCTCOPY(NullAddress, MainEnvelope.e_from);
 525
 526         /*
 527         **  Set default values for variables.
 528         **      These cannot be in initialized data space.
 529         */
 530
 531         setdefaults(&BlankEnvelope);
 532         initmacros(&BlankEnvelope);
 533
 534         /* reset macro */
 535         set_op_mode(OpMode);
 536         if (OpMode == MD_DAEMON)
 537                 DaemonPid = CurrentPid; /* needed for finis() to work */
 538
 539         pw = sm_getpwuid(RealUid);
 540         if (pw != NULL)
 541                 (void) sm_strlcpy(rnamebuf, pw->pw_name, sizeof(rnamebuf));
 542         else
 543                 (void) sm_snprintf(rnamebuf, sizeof(rnamebuf), "Unknown UID %d",
 544                                    (int) RealUid);
 545
 546         RealUserName = rnamebuf;
 547
 548         if (tTd(0, 101))
 549         {
 550                 sm_dprintf("Version %s\n", Version);
 551                 finis(false, true, EX_OK);
 552                 /* NOTREACHED */
 553         }
 554
 555         /*
 556         **  if running non-set-user-ID binary as non-root, pretend
 557         **  we are the RunAsUid
 558         */
 559
 560         if (RealUid != 0 && geteuid() == RealUid)
 561         {
 562                 if (tTd(47, 1))
 563                         sm_dprintf("Non-set-user-ID binary: RunAsUid = RealUid = %d\n",
 564                                    (int) RealUid);
 565                 RunAsUid = RealUid;
 566         }
 567         else if (geteuid() != 0)
 568                 RunAsUid = geteuid();
 569
 570         EffGid = getegid();
 571         if (RealUid != 0 && EffGid == RealGid)
 572                 RunAsGid = RealGid;
 573
 574         if (tTd(47, 5))
 575         {
 576                 sm_dprintf("main: e/ruid = %d/%d e/rgid = %d/%d\n",
 577                            (int) geteuid(), (int) getuid(),
 578                            (int) getegid(), (int) getgid());
 579                 sm_dprintf("main: RunAsUser = %d:%d\n",
 580                            (int) RunAsUid, (int) RunAsGid);
 581         }
 582
 583         /* save command line arguments */
 584         j = 0;
 585         for (av = argv; *av != NULL; )
 586                 j += strlen(*av++) + 1;
 587         SaveArgv = (char **) xalloc(sizeof(char *) * (argc + 1));
 588         CommandLineArgs = xalloc(j);
 589         p = CommandLineArgs;
 590         for (av = argv, i = 0; *av != NULL; )
 591         {
 592                 int h;
 593
 594                 SaveArgv[i++] = newstr(*av);
 595                 if (av != argv)
 596                         *p++ = ' ';
 597                 (void) sm_strlcpy(p, *av++, j);
 598                 h = strlen(p);
 599                 p += h;
 600                 j -= h + 1;
 601         }
 602         SaveArgv[i] = NULL;
 603
 604         if (tTd(0, 1))
 605         {
 606                 extern char *CompileOptions[];
 607
 608                 sm_dprintf("Version %s\n Compiled with:", Version);
 609                 sm_printoptions(CompileOptions);
 610         }
 611         if (tTd(0, 10))
 612         {
 613                 extern char *OsCompileOptions[];
 614
 615                 sm_dprintf("    OS Defines:");
 616                 sm_printoptions(OsCompileOptions);
 617 #ifdef _PATH_UNIX
 618                 sm_dprintf("Kernel symbols:\t%s\n", _PATH_UNIX);
 619 #endif /* _PATH_UNIX */
 620
 621                 sm_dprintf("     Conf file:\t%s (default for MSP)\n",
 622                            getcfname(OpMode, SubmitMode, SM_GET_SUBMIT_CF,
 623                                      conffile));
 624                 sm_dprintf("     Conf file:\t%s (default for MTA)\n",
 625                            getcfname(OpMode, SubmitMode, SM_GET_SENDMAIL_CF,
 626                                      conffile));
 627                 sm_dprintf("      Pid file:\t%s (default)\n", PidFile);
 628         }
 629
 630         if (tTd(0, 12))
 631         {
 632                 extern char *SmCompileOptions[];
 633
 634                 sm_dprintf(" libsm Defines:");
 635                 sm_printoptions(SmCompileOptions);
 636         }
 637
 638         if (tTd(0, 13))
 639         {
 640                 extern char *FFRCompileOptions[];
 641
 642                 sm_dprintf("   FFR Defines:");
 643                 sm_printoptions(FFRCompileOptions);
 644         }
 645
 646         /* clear sendmail's environment */
 647         ExternalEnviron = environ;
 648         emptyenviron[0] = NULL;
 649         environ = emptyenviron;
 650
 651         /*
 652         **  restore any original TZ setting until TimeZoneSpec has been
 653         **  determined - or early log messages may get bogus time stamps
 654         */
 655
 656         if ((p = getextenv("TZ")) != NULL)
 657         {
 658                 char *tz;
 659                 int tzlen;
 660
 661                 /* XXX check for reasonable length? */
 662                 tzlen = strlen(p) + 4;
 663                 tz = xalloc(tzlen);
 664                 (void) sm_strlcpyn(tz, tzlen, 2, "TZ=", p);
 665
 666                 /* XXX check return code? */
 667                 (void) putenv(tz);
 668         }
 669
 670         /* prime the child environment */
 671         sm_setuserenv("AGENT", "sendmail");
 672
 673         (void) sm_signal(SIGPIPE, SIG_IGN);
 674         OldUmask = umask(022);
 675         FullName = getextenv("NAME");
 676         if (FullName != NULL)
 677                 FullName = newstr(FullName);
 678
 679         /*
 680         **  Initialize name server if it is going to be used.
 681         */
 682
 683 #if NAMED_BIND
 684         if (!bitset(RES_INIT, _res.options))
 685                 (void) res_init();
 686         if (tTd(8, 8))
 687                 _res.options |= RES_DEBUG;
 688         else
 689                 _res.options &= ~RES_DEBUG;
 690 # ifdef RES_NOALIASES
 691         _res.options |= RES_NOALIASES;
 692 # endif /* RES_NOALIASES */
 693         TimeOuts.res_retry[RES_TO_DEFAULT] = _res.retry;
 694         TimeOuts.res_retry[RES_TO_FIRST] = _res.retry;
 695         TimeOuts.res_retry[RES_TO_NORMAL] = _res.retry;
 696         TimeOuts.res_retrans[RES_TO_DEFAULT] = _res.retrans;
 697         TimeOuts.res_retrans[RES_TO_FIRST] = _res.retrans;
 698         TimeOuts.res_retrans[RES_TO_NORMAL] = _res.retrans;
 699 #endif /* NAMED_BIND */
 700
 701         errno = 0;
 702         from = NULL;
 703
 704         /* initialize some macros, etc. */
 705         init_vendor_macros(&BlankEnvelope);
 706
 707         /* version */
 708         macdefine(&BlankEnvelope.e_macro, A_PERM, 'v', Version);
 709
 710         /* hostname */
 711         hp = myhostname(jbuf, sizeof(jbuf));
 712         if (jbuf[0] != '\0')
 713         {
 714                 struct utsname utsname;
 715
 716                 if (tTd(0, 4))
 717                         sm_dprintf("Canonical name: %s\n", jbuf);
 718                 macdefine(&BlankEnvelope.e_macro, A_TEMP, 'w', jbuf);
 719                 macdefine(&BlankEnvelope.e_macro, A_TEMP, 'j', jbuf);
 720                 setclass('w', jbuf);
 721
 722                 p = strchr(jbuf, '.');
 723                 if (p != NULL && p[1] != '\0')
 724                         macdefine(&BlankEnvelope.e_macro, A_TEMP, 'm', &p[1]);
 725
 726                 if (uname(&utsname) >= 0)
 727                         p = utsname.nodename;
 728                 else
 729                 {
 730                         if (tTd(0, 22))
 731                                 sm_dprintf("uname failed (%s)\n",
 732                                            sm_errstring(errno));
 733                         makelower(jbuf);
 734                         p = jbuf;
 735                 }
 736                 if (tTd(0, 4))
 737                         sm_dprintf(" UUCP nodename: %s\n", p);
 738                 macdefine(&BlankEnvelope.e_macro, A_TEMP, 'k', p);
 739                 setclass('k', p);
 740                 setclass('w', p);
 741         }
 742         if (hp != NULL)
 743         {
 744                 for (av = hp->h_aliases; av != NULL && *av != NULL; av++)
 745                 {
 746                         if (tTd(0, 4))
 747                                 sm_dprintf("\ta.k.a.: %s\n", *av);
 748                         setclass('w', *av);
 749                 }
 750 #if NETINET || NETINET6
 751                 for (i = 0; i >= 0 && hp->h_addr_list[i] != NULL; i++)
 752                 {
 753 # if NETINET6
 754                         char *addr;
 755                         char buf6[INET6_ADDRSTRLEN];
 756                         struct in6_addr ia6;
 757 # endif /* NETINET6 */
 758 # if NETINET
 759                         struct in_addr ia;
 760 # endif /* NETINET */
 761                         char ipbuf[103];
 762
 763                         ipbuf[0] = '\0';
 764                         switch (hp->h_addrtype)
 765                         {
 766 # if NETINET
 767                           case AF_INET:
 768                                 if (hp->h_length != INADDRSZ)
 769                                         break;
 770
 771                                 memmove(&ia, hp->h_addr_list[i], INADDRSZ);
 772                                 (void) sm_snprintf(ipbuf, sizeof(ipbuf),
 773                                                    "[%.100s]", inet_ntoa(ia));
 774                                 break;
 775 # endif /* NETINET */
 776
 777 # if NETINET6
 778                           case AF_INET6:
 779                                 if (hp->h_length != IN6ADDRSZ)
 780                                         break;
 781
 782                                 memmove(&ia6, hp->h_addr_list[i], IN6ADDRSZ);
 783                                 addr = anynet_ntop(&ia6, buf6, sizeof(buf6));
 784                                 if (addr != NULL)
 785                                         (void) sm_snprintf(ipbuf, sizeof(ipbuf),
 786                                                            "[%.100s]", addr);
 787                                 break;
 788 # endif /* NETINET6 */
 789                         }
 790                         if (ipbuf[0] == '\0')
 791                                 break;
 792
 793                         if (tTd(0, 4))
 794                                 sm_dprintf("\ta.k.a.: %s\n", ipbuf);
 795                         setclass('w', ipbuf);
 796                 }
 797 #endif /* NETINET || NETINET6 */
 798 #if NETINET6
 799                 freehostent(hp);
 800                 hp = NULL;
 801 #endif /* NETINET6 */
 802         }
 803
 804         /* current time */
 805         macdefine(&BlankEnvelope.e_macro, A_TEMP, 'b', arpadate((char *) NULL));
 806
 807         /* current load average */
 808         sm_getla();
 809
 810         QueueLimitRecipient = (QUEUE_CHAR *) NULL;
 811         QueueLimitSender = (QUEUE_CHAR *) NULL;
 812         QueueLimitId = (QUEUE_CHAR *) NULL;
 813         QueueLimitQuarantine = (QUEUE_CHAR *) NULL;
 814
 815         /*
 816         **  Crack argv.
 817         */
 818
 819         optind = 1;
 820         while ((j = getopt(argc, argv, OPTIONS)) != -1)
 821         {
 822                 switch (j)
 823                 {
 824                   case 'b':     /* operations mode */
 825                         /* already done */
 826                         break;
 827
 828                   case 'A':     /* use Alternate sendmail/submit.cf */
 829                         cftype = optarg[0] == 'c' ? SM_GET_SUBMIT_CF
 830                                                   : SM_GET_SENDMAIL_CF;
 831                         break;
 832
 833                   case 'B':     /* body type */
 834                         CHECK_AGAINST_OPMODE(j);
 835                         BlankEnvelope.e_bodytype = newstr(optarg);
 836                         break;
 837
 838                   case 'C':     /* select configuration file (already done) */
 839                         if (RealUid != 0)
 840                                 warn_C_flag = true;
 841                         conffile = newstr(optarg);
 842                         dp = drop_privileges(true);
 843                         setstat(dp);
 844                         safecf = false;
 845                         break;
 846
 847                   case 'D':
 848                   case 'd':     /* debugging */
 849                         /* already done */
 850                         break;
 851
 852                   case 'f':     /* from address */
 853                   case 'r':     /* obsolete -f flag */
 854                         CHECK_AGAINST_OPMODE(j);
 855                         if (from != NULL)
 856                         {
 857                                 usrerr("More than one \"from\" person");
 858                                 ExitStat = EX_USAGE;
 859                                 break;
 860                         }
 861                         if (optarg[0] == '\0')
 862                                 from = newstr("<>");
 863                         else
 864                                 from = newstr(denlstring(optarg, true, true));
 865                         if (strcmp(RealUserName, from) != 0)
 866                                 warn_f_flag = j;
 867                         break;
 868
 869                   case 'F':     /* set full name */
 870                         CHECK_AGAINST_OPMODE(j);
 871                         FullName = newstr(optarg);
 872                         break;
 873
 874                   case 'G':     /* relay (gateway) submission */
 875                         /* already set */
 876                         CHECK_AGAINST_OPMODE(j);
 877                         break;
 878
 879                   case 'h':     /* hop count */
 880                         CHECK_AGAINST_OPMODE(j);
 881                         BlankEnvelope.e_hopcount = (short) strtol(optarg, &ep,
 882                                                                   10);
 883                         (void) sm_snprintf(buf, sizeof(buf), "%d",
 884                                            BlankEnvelope.e_hopcount);
 885                         macdefine(&BlankEnvelope.e_macro, A_TEMP, 'c', buf);
 886
 887                         if (*ep)
 888                         {
 889                                 usrerr("Bad hop count (%s)", optarg);
 890                                 ExitStat = EX_USAGE;
 891                         }
 892                         break;
 893
 894                   case 'L':     /* program label */
 895                         /* already set */
 896                         break;
 897
 898                   case 'n':     /* don't alias */
 899                         CHECK_AGAINST_OPMODE(j);
 900                         NoAlias = true;
 901                         break;
 902
 903                   case 'N':     /* delivery status notifications */
 904                         CHECK_AGAINST_OPMODE(j);
 905                         DefaultNotify |= QHASNOTIFY;
 906                         macdefine(&BlankEnvelope.e_macro, A_TEMP,
 907                                 macid("{dsn_notify}"), optarg);
 908                         if (sm_strcasecmp(optarg, "never") == 0)
 909                                 break;
 910                         for (p = optarg; p != NULL; optarg = p)
 911                         {
 912                                 p = strchr(p, ',');
 913                                 if (p != NULL)
 914                                         *p++ = '\0';
 915                                 if (sm_strcasecmp(optarg, "success") == 0)
 916                                         DefaultNotify |= QPINGONSUCCESS;
 917                                 else if (sm_strcasecmp(optarg, "failure") == 0)
 918                                         DefaultNotify |= QPINGONFAILURE;
 919                                 else if (sm_strcasecmp(optarg, "delay") == 0)
 920                                         DefaultNotify |= QPINGONDELAY;
 921                                 else
 922                                 {
 923                                         usrerr("Invalid -N argument");
 924                                         ExitStat = EX_USAGE;
 925                                 }
 926                         }
 927                         break;
 928
 929                   case 'o':     /* set option */
 930                         setoption(*optarg, optarg + 1, false, true,
 931                                   &BlankEnvelope);
 932                         break;
 933
 934                   case 'O':     /* set option (long form) */
 935                         setoption(' ', optarg, false, true, &BlankEnvelope);
 936                         break;
 937
 938                   case 'p':     /* set protocol */
 939                         CHECK_AGAINST_OPMODE(j);
 940                         p = strchr(optarg, ':');
 941                         if (p != NULL)
 942                         {
 943                                 *p++ = '\0';
 944                                 if (*p != '\0')
 945                                 {
 946                                         i = strlen(p) + 1;
 947                                         ep = sm_malloc_x(i);
 948                                         cleanstrcpy(ep, p, i);
 949                                         macdefine(&BlankEnvelope.e_macro,
 950                                                   A_HEAP, 's', ep);
 951                                 }
 952                         }
 953                         if (*optarg != '\0')
 954                         {
 955                                 i = strlen(optarg) + 1;
 956                                 ep = sm_malloc_x(i);
 957                                 cleanstrcpy(ep, optarg, i);
 958                                 macdefine(&BlankEnvelope.e_macro, A_HEAP,
 959                                           'r', ep);
 960                         }
 961                         break;
 962
 963                   case 'Q':     /* change quarantining on queued items */
 964                         /* sanity check */
 965                         if (OpMode != MD_DELIVER &&
 966                             OpMode != MD_QUEUERUN)
 967                         {
 968                                 usrerr("Can not use -Q with -b%c", OpMode);
 969                                 ExitStat = EX_USAGE;
 970                                 break;
 971                         }
 972
 973                         if (OpMode == MD_DELIVER)
 974                                 set_op_mode(MD_QUEUERUN);
 975
 976                         FullName = NULL;
 977
 978                         quarantining = newstr(optarg);
 979                         break;
 980
 981                   case 'q':     /* run queue files at intervals */
 982                         /* sanity check */
 983                         if (OpMode != MD_DELIVER &&
 984                             OpMode != MD_DAEMON &&
 985                             OpMode != MD_FGDAEMON &&
 986                             OpMode != MD_PRINT &&
 987                             OpMode != MD_PRINTNQE &&
 988                             OpMode != MD_QUEUERUN)
 989                         {
 990                                 usrerr("Can not use -q with -b%c", OpMode);
 991                                 ExitStat = EX_USAGE;
 992                                 break;
 993                         }
 994
 995                         /* don't override -bd, -bD or -bp */
 996                         if (OpMode == MD_DELIVER)
 997                                 set_op_mode(MD_QUEUERUN);
 998
 999                         FullName = NULL;
1000                         negate = optarg[0] == '!';
1001                         if (negate)
1002                         {
1003                                 /* negate meaning of pattern match */
1004                                 optarg++; /* skip '!' for next switch */
1005                         }
1006
1007                         switch (optarg[0])
1008                         {
1009                           case 'G': /* Limit by queue group name */
1010                                 if (negate)
1011                                 {
1012                                         usrerr("Can not use -q!G");
1013                                         ExitStat = EX_USAGE;
1014                                         break;
1015                                 }
1016                                 if (queuegroup != NULL)
1017                                 {
1018                                         usrerr("Can not use multiple -qG options");
1019                                         ExitStat = EX_USAGE;
1020                                         break;
1021                                 }
1022                                 queuegroup = newstr(&optarg[1]);
1023                                 break;
1024
1025                           case 'I': /* Limit by ID */
1026                                 new = (QUEUE_CHAR *) xalloc(sizeof(*new));
1027                                 new->queue_match = newstr(&optarg[1]);
1028                                 new->queue_negate = negate;
1029                                 new->queue_next = QueueLimitId;
1030                                 QueueLimitId = new;
1031                                 break;
1032
1033                           case 'R': /* Limit by recipient */
1034                                 new = (QUEUE_CHAR *) xalloc(sizeof(*new));
1035                                 new->queue_match = newstr(&optarg[1]);
1036                                 new->queue_negate = negate;
1037                                 new->queue_next = QueueLimitRecipient;
1038                                 QueueLimitRecipient = new;
1039                                 break;
1040
1041                           case 'S': /* Limit by sender */
1042                                 new = (QUEUE_CHAR *) xalloc(sizeof(*new));
1043                                 new->queue_match = newstr(&optarg[1]);
1044                                 new->queue_negate = negate;
1045                                 new->queue_next = QueueLimitSender;
1046                                 QueueLimitSender = new;
1047                                 break;
1048
1049                           case 'f': /* foreground queue run */
1050                                 foregroundqueue  = true;
1051                                 break;
1052
1053                           case 'Q': /* Limit by quarantine message */
1054                                 if (optarg[1] != '\0')
1055                                 {
1056                                         new = (QUEUE_CHAR *) xalloc(sizeof(*new));
1057                                         new->queue_match = newstr(&optarg[1]);
1058                                         new->queue_negate = negate;
1059                                         new->queue_next = QueueLimitQuarantine;
1060                                         QueueLimitQuarantine = new;
1061                                 }
1062                                 QueueMode = QM_QUARANTINE;
1063                                 break;
1064
1065                           case 'L': /* act on lost items */
1066                                 QueueMode = QM_LOST;
1067                                 break;
1068
1069                           case 'p': /* Persistent queue */
1070                                 queuepersistent = true;
1071                                 if (QueueIntvl == 0)
1072                                         QueueIntvl = 1;
1073                                 if (optarg[1] == '\0')
1074                                         break;
1075                                 ++optarg;
1076                                 /* FALLTHROUGH */
1077
1078                           default:
1079                                 i = Errors;
1080                                 QueueIntvl = convtime(optarg, 'm');
1081                                 if (QueueIntvl < 0)
1082                                 {
1083                                         usrerr("Invalid -q value");
1084                                         ExitStat = EX_USAGE;
1085                                 }
1086
1087                                 /* check for bad conversion */
1088                                 if (i < Errors)
1089                                         ExitStat = EX_USAGE;
1090                                 break;
1091                         }
1092                         break;
1093
1094                   case 'R':     /* DSN RET: what to return */
1095                         CHECK_AGAINST_OPMODE(j);
1096                         if (bitset(EF_RET_PARAM, BlankEnvelope.e_flags))
1097                         {
1098                                 usrerr("Duplicate -R flag");
1099                                 ExitStat = EX_USAGE;
1100                                 break;
1101                         }
1102                         BlankEnvelope.e_flags |= EF_RET_PARAM;
1103                         if (sm_strcasecmp(optarg, "hdrs") == 0)
1104                                 BlankEnvelope.e_flags |= EF_NO_BODY_RETN;
1105                         else if (sm_strcasecmp(optarg, "full") != 0)
1106                         {
1107                                 usrerr("Invalid -R value");
1108                                 ExitStat = EX_USAGE;
1109                         }
1110                         macdefine(&BlankEnvelope.e_macro, A_TEMP,
1111                                   macid("{dsn_ret}"), optarg);
1112                         break;
1113
1114                   case 't':     /* read recipients from message */
1115                         CHECK_AGAINST_OPMODE(j);
1116                         GrabTo = true;
1117                         break;
1118
1119                   case 'V':     /* DSN ENVID: set "original" envelope id */
1120                         CHECK_AGAINST_OPMODE(j);
1121                         if (!xtextok(optarg))
1122                         {
1123                                 usrerr("Invalid syntax in -V flag");
1124                                 ExitStat = EX_USAGE;
1125                         }
1126                         else
1127                         {
1128                                 BlankEnvelope.e_envid = newstr(optarg);
1129                                 macdefine(&BlankEnvelope.e_macro, A_TEMP,
1130                                           macid("{dsn_envid}"), optarg);
1131                         }
1132                         break;
1133
1134                   case 'X':     /* traffic log file */
1135                         dp = drop_privileges(true);
1136                         setstat(dp);
1137                         if (stat(optarg, &traf_st) == 0 &&
1138                             S_ISFIFO(traf_st.st_mode))
1139                                 TrafficLogFile = sm_io_open(SmFtStdio,
1140                                                             SM_TIME_DEFAULT,
1141                                                             optarg,
1142                                                             SM_IO_WRONLY, NULL);
1143                         else
1144                                 TrafficLogFile = sm_io_open(SmFtStdio,
1145                                                             SM_TIME_DEFAULT,
1146                                                             optarg,
1147                                                             SM_IO_APPEND, NULL);
1148                         if (TrafficLogFile == NULL)
1149                         {
1150                                 syserr("cannot open %s", optarg);
1151                                 ExitStat = EX_CANTCREAT;
1152                                 break;
1153                         }
1154                         (void) sm_io_setvbuf(TrafficLogFile, SM_TIME_DEFAULT,
1155                                              NULL, SM_IO_LBF, 0);
1156                         break;
1157
1158                         /* compatibility flags */
1159                   case 'c':     /* connect to non-local mailers */
1160                   case 'i':     /* don't let dot stop me */
1161                   case 'm':     /* send to me too */
1162                   case 'T':     /* set timeout interval */
1163                   case 'v':     /* give blow-by-blow description */
1164                         setoption(j, "T", false, true, &BlankEnvelope);
1165                         break;
1166
1167                   case 'e':     /* error message disposition */
1168                   case 'M':     /* define macro */
1169                         setoption(j, optarg, false, true, &BlankEnvelope);
1170                         break;
1171
1172                   case 's':     /* save From lines in headers */
1173                         setoption('f', "T", false, true, &BlankEnvelope);
1174                         break;
1175
1176 #ifdef DBM
1177                   case 'I':     /* initialize alias DBM file */
1178                         set_op_mode(MD_INITALIAS);
1179                         break;
1180 #endif /* DBM */
1181
1182 #if defined(__osf__) || defined(_AIX3)
1183                   case 'x':     /* random flag that OSF/1 & AIX mailx passes */
1184                         break;
1185 #endif /* defined(__osf__) || defined(_AIX3) */
1186 #if defined(sony_news)
1187                   case 'E':
1188                   case 'J':     /* ignore flags for Japanese code conversion
1189                                    implemented on Sony NEWS */
1190                         break;
1191 #endif /* defined(sony_news) */
1192
1193                   default:
1194                         finis(true, true, EX_USAGE);
1195                         /* NOTREACHED */
1196                         break;
1197                 }
1198         }
1199
1200         /* if we've had errors so far, exit now */
1201         if ((ExitStat != EX_OK && OpMode != MD_TEST && OpMode != MD_CHECKCONFIG) ||
1202             ExitStat == EX_OSERR)
1203         {
1204                 finis(false, true, ExitStat);
1205                 /* NOTREACHED */
1206         }
1207
1208         if (bitset(SUBMIT_MTA, SubmitMode))
1209         {
1210                 /* If set daemon_flags on command line, don't reset it */
1211                 if (macvalue(macid("{daemon_flags}"), &BlankEnvelope) == NULL)
1212                         macdefine(&BlankEnvelope.e_macro, A_PERM,
1213                                   macid("{daemon_flags}"), "CC f");
1214         }
1215         else if (OpMode == MD_DELIVER || OpMode == MD_SMTP)
1216         {
1217                 SubmitMode = SUBMIT_MSA;
1218
1219                 /* If set daemon_flags on command line, don't reset it */
1220                 if (macvalue(macid("{daemon_flags}"), &BlankEnvelope) == NULL)
1221                         macdefine(&BlankEnvelope.e_macro, A_PERM,
1222                                   macid("{daemon_flags}"), "c u");
1223         }
1224
1225         /*
1226         **  Do basic initialization.
1227         **      Read system control file.
1228         **      Extract special fields for local use.
1229         */
1230
1231 #if XDEBUG
1232         checkfd012("before readcf");
1233 #endif /* XDEBUG */
1234         vendor_pre_defaults(&BlankEnvelope);
1235
1236         readcf(getcfname(OpMode, SubmitMode, cftype, conffile),
1237                          safecf, &BlankEnvelope);
1238 #if !defined(_USE_SUN_NSSWITCH_) && !defined(_USE_DEC_SVC_CONF_)
1239         ConfigFileRead = true;
1240 #endif /* !defined(_USE_SUN_NSSWITCH_) && !defined(_USE_DEC_SVC_CONF_) */
1241         vendor_post_defaults(&BlankEnvelope);
1242
1243         /* now we can complain about missing fds */
1244         if (MissingFds != 0 && LogLevel > 8)
1245         {
1246                 char mbuf[MAXLINE];
1247
1248                 mbuf[0] = '\0';
1249                 if (bitset(1 << STDIN_FILENO, MissingFds))
1250                         (void) sm_strlcat(mbuf, ", stdin", sizeof(mbuf));
1251                 if (bitset(1 << STDOUT_FILENO, MissingFds))
1252                         (void) sm_strlcat(mbuf, ", stdout", sizeof(mbuf));
1253                 if (bitset(1 << STDERR_FILENO, MissingFds))
1254                         (void) sm_strlcat(mbuf, ", stderr", sizeof(mbuf));
1255
1256                 /* Notice: fill_errno is from high above: fill_fd() */
1257                 sm_syslog(LOG_WARNING, NOQID,
1258                           "File descriptors missing on startup: %s; %s",
1259                           &mbuf[2], sm_errstring(fill_errno));
1260         }
1261
1262         /* Remove the ability for a normal user to send signals */
1263         if (RealUid != 0 && RealUid != geteuid())
1264         {
1265                 uid_t new_uid = geteuid();
1266
1267 #if HASSETREUID
1268                 /*
1269                 **  Since we can differentiate between uid and euid,
1270                 **  make the uid a different user so the real user
1271                 **  can't send signals.  However, it doesn't need to be
1272                 **  root (euid has root).
1273                 */
1274
1275                 if (new_uid == 0)
1276                         new_uid = DefUid;
1277                 if (tTd(47, 5))
1278                         sm_dprintf("Changing real uid to %d\n", (int) new_uid);
1279                 if (setreuid(new_uid, geteuid()) < 0)
1280                 {
1281                         syserr("main: setreuid(%d, %d) failed",
1282                                (int) new_uid, (int) geteuid());
1283                         finis(false, true, EX_OSERR);
1284                         /* NOTREACHED */
1285                 }
1286                 if (tTd(47, 10))
1287                         sm_dprintf("Now running as e/ruid %d:%d\n",
1288                                    (int) geteuid(), (int) getuid());
1289 #else /* HASSETREUID */
1290                 /*
1291                 **  Have to change both effective and real so need to
1292                 **  change them both to effective to keep privs.
1293                 */
1294
1295                 if (tTd(47, 5))
1296                         sm_dprintf("Changing uid to %d\n", (int) new_uid);
1297                 if (setuid(new_uid) < 0)
1298                 {
1299                         syserr("main: setuid(%d) failed", (int) new_uid);
1300                         finis(false, true, EX_OSERR);
1301                         /* NOTREACHED */
1302                 }
1303                 if (tTd(47, 10))
1304                         sm_dprintf("Now running as e/ruid %d:%d\n",
1305                                    (int) geteuid(), (int) getuid());
1306 #endif /* HASSETREUID */
1307         }
1308
1309 #if NAMED_BIND
1310         if (FallbackMX != NULL)
1311                 (void) getfallbackmxrr(FallbackMX);
1312 #endif /* NAMED_BIND */
1313
1314         if (SuperSafe == SAFE_INTERACTIVE && !SM_IS_INTERACTIVE(CurEnv->e_sendmode))
1315         {
1316                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
1317                                      "WARNING: SuperSafe=interactive should only be used with\n         DeliveryMode=interactive\n");
1318         }
1319
1320         if (UseMSP && (OpMode == MD_DAEMON || OpMode == MD_FGDAEMON))
1321         {
1322                 usrerr("Mail submission program cannot be used as daemon");
1323                 finis(false, true, EX_USAGE);
1324         }
1325
1326         if (OpMode == MD_DELIVER || OpMode == MD_SMTP ||
1327             OpMode == MD_QUEUERUN || OpMode == MD_ARPAFTP ||
1328             OpMode == MD_DAEMON || OpMode == MD_FGDAEMON)
1329                 makeworkgroups();
1330
1331         /* set up the basic signal handlers */
1332         if (sm_signal(SIGINT, SIG_IGN) != SIG_IGN)
1333                 (void) sm_signal(SIGINT, intsig);
1334         (void) sm_signal(SIGTERM, intsig);
1335
1336         /* Enforce use of local time (null string overrides this) */
1337         if (TimeZoneSpec == NULL)
1338                 unsetenv("TZ");
1339         else if (TimeZoneSpec[0] != '\0')
1340                 sm_setuserenv("TZ", TimeZoneSpec);
1341         else
1342                 sm_setuserenv("TZ", NULL);
1343         tzset();
1344
1345         /* initialize mailbox database */
1346         i = sm_mbdb_initialize(Mbdb);
1347         if (i != EX_OK)
1348         {
1349                 usrerr("Can't initialize mailbox database \"%s\": %s",
1350                        Mbdb, sm_strexit(i));
1351                 ExitStat = i;
1352         }
1353
1354         /* avoid denial-of-service attacks */
1355         resetlimits();
1356
1357         if (OpMode == MD_TEST)
1358         {
1359                 /* can't be done after readcf if RunAs* is used */
1360                 dp = drop_privileges(true);
1361                 if (dp != EX_OK)
1362                 {
1363                         finis(false, true, dp);
1364                         /* NOTREACHED */
1365                 }
1366         }
1367         else if (OpMode != MD_DAEMON && OpMode != MD_FGDAEMON)
1368         {
1369                 /* drop privileges -- daemon mode done after socket/bind */
1370                 dp = drop_privileges(false);
1371                 setstat(dp);
1372                 if (dp == EX_OK && UseMSP && (geteuid() == 0 || getuid() == 0))
1373                 {
1374                         usrerr("Mail submission program must have RunAsUser set to non root user");
1375                         finis(false, true, EX_CONFIG);
1376                         /* NOTREACHED */
1377                 }
1378         }
1379
1380 #if NAMED_BIND
1381         _res.retry = TimeOuts.res_retry[RES_TO_DEFAULT];
1382         _res.retrans = TimeOuts.res_retrans[RES_TO_DEFAULT];
1383 #endif /* NAMED_BIND */
1384
1385         /*
1386         **  Find our real host name for future logging.
1387         */
1388
1389         authinfo = getauthinfo(STDIN_FILENO, &forged);
1390         macdefine(&BlankEnvelope.e_macro, A_TEMP, '_', authinfo);
1391
1392         /* suppress error printing if errors mailed back or whatever */
1393         if (BlankEnvelope.e_errormode != EM_PRINT)
1394                 HoldErrs = true;
1395
1396         /* set up the $=m class now, after .cf has a chance to redefine $m */
1397         expand("\201m", jbuf, sizeof(jbuf), &BlankEnvelope);
1398         if (jbuf[0] != '\0')
1399                 setclass('m', jbuf);
1400
1401         /* probe interfaces and locate any additional names */
1402         if (DontProbeInterfaces != DPI_PROBENONE)
1403                 load_if_names();
1404
1405         if (tTd(0, 10))
1406         {
1407                 char pidpath[MAXPATHLEN];
1408
1409                 /* Now we know which .cf file we use */
1410                 sm_dprintf("     Conf file:\t%s (selected)\n",
1411                            getcfname(OpMode, SubmitMode, cftype, conffile));
1412                 expand(PidFile, pidpath, sizeof(pidpath), &BlankEnvelope);
1413                 sm_dprintf("      Pid file:\t%s (selected)\n", pidpath);
1414         }
1415
1416         if (tTd(0, 1))
1417         {
1418                 sm_dprintf("\n============ SYSTEM IDENTITY (after readcf) ============");
1419                 sm_dprintf("\n      (short domain name) $w = ");
1420                 xputs(sm_debug_file(), macvalue('w', &BlankEnvelope));
1421                 sm_dprintf("\n  (canonical domain name) $j = ");
1422                 xputs(sm_debug_file(), macvalue('j', &BlankEnvelope));
1423                 sm_dprintf("\n         (subdomain name) $m = ");
1424                 xputs(sm_debug_file(), macvalue('m', &BlankEnvelope));
1425                 sm_dprintf("\n              (node name) $k = ");
1426                 xputs(sm_debug_file(), macvalue('k', &BlankEnvelope));
1427                 sm_dprintf("\n========================================================\n\n");
1428         }
1429
1430         /*
1431         **  Do more command line checking -- these are things that
1432         **  have to modify the results of reading the config file.
1433         */
1434
1435         /* process authorization warnings from command line */
1436         if (warn_C_flag)
1437                 auth_warning(&BlankEnvelope, "Processed by %s with -C %s",
1438                              RealUserName, conffile);
1439         if (Warn_Q_option && !wordinclass(RealUserName, 't'))
1440                 auth_warning(&BlankEnvelope, "Processed from queue %s",
1441                              QueueDir);
1442         if (sysloglabel != NULL && !wordinclass(RealUserName, 't') &&
1443             RealUid != 0 && RealUid != TrustedUid && LogLevel > 1)
1444                 sm_syslog(LOG_WARNING, NOQID, "user %d changed syslog label",
1445                           (int) RealUid);
1446
1447         /* check body type for legality */
1448         i = check_bodytype(BlankEnvelope.e_bodytype);
1449         if (i == BODYTYPE_ILLEGAL)
1450         {
1451                 usrerr("Illegal body type %s", BlankEnvelope.e_bodytype);
1452                 BlankEnvelope.e_bodytype = NULL;
1453         }
1454         else if (i != BODYTYPE_NONE)
1455                 SevenBitInput = (i == BODYTYPE_7BIT);
1456
1457         /* tweak default DSN notifications */
1458         if (DefaultNotify == 0)
1459                 DefaultNotify = QPINGONFAILURE|QPINGONDELAY;
1460
1461         /* check for sane configuration level */
1462         if (ConfigLevel > MAXCONFIGLEVEL)
1463         {
1464                 syserr("Warning: .cf version level (%d) exceeds sendmail version %s functionality (%d)",
1465                        ConfigLevel, Version, MAXCONFIGLEVEL);
1466         }
1467
1468         /* need MCI cache to have persistence */
1469         if (HostStatDir != NULL && MaxMciCache == 0)
1470         {
1471                 HostStatDir = NULL;
1472                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
1473                                      "Warning: HostStatusDirectory disabled with ConnectionCacheSize = 0\n");
1474         }
1475
1476         /* need HostStatusDir in order to have SingleThreadDelivery */
1477         if (SingleThreadDelivery && HostStatDir == NULL)
1478         {
1479                 SingleThreadDelivery = false;
1480                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
1481                                      "Warning: HostStatusDirectory required for SingleThreadDelivery\n");
1482         }
1483
1484 #if _FFR_MEMSTAT
1485         j = sm_memstat_open();
1486         if (j < 0 && (RefuseLowMem > 0 || QueueLowMem > 0) && LogLevel > 4)
1487         {
1488                 sm_syslog(LOG_WARNING, NOQID,
1489                           "cannot get memory statistics, settings ignored, error=%d"
1490                           , j);
1491         }
1492 #endif /* _FFR_MEMSTAT */
1493
1494         /* check for permissions */
1495         if (RealUid != 0 &&
1496             RealUid != TrustedUid)
1497         {
1498                 char *action = NULL;
1499
1500                 switch (OpMode)
1501                 {
1502                   case MD_QUEUERUN:
1503                         if (quarantining != NULL)
1504                                 action = "quarantine jobs";
1505                         else
1506                         {
1507                                 /* Normal users can do a single queue run */
1508                                 if (QueueIntvl == 0)
1509                                         break;
1510                         }
1511
1512                         /* but not persistent queue runners */
1513                         if (action == NULL)
1514                                 action = "start a queue runner daemon";
1515                         /* FALLTHROUGH */
1516
1517                   case MD_PURGESTAT:
1518                         if (action == NULL)
1519                                 action = "purge host status";
1520                         /* FALLTHROUGH */
1521
1522                   case MD_DAEMON:
1523                   case MD_FGDAEMON:
1524                         if (action == NULL)
1525                                 action = "run daemon";
1526
1527                         if (tTd(65, 1))
1528                                 sm_dprintf("Deny user %d attempt to %s\n",
1529                                            (int) RealUid, action);
1530
1531                         if (LogLevel > 1)
1532                                 sm_syslog(LOG_ALERT, NOQID,
1533                                           "user %d attempted to %s",
1534                                           (int) RealUid, action);
1535                         HoldErrs = false;
1536                         usrerr("Permission denied (real uid not trusted)");
1537                         finis(false, true, EX_USAGE);
1538                         /* NOTREACHED */
1539                         break;
1540
1541                   case MD_VERIFY:
1542                         if (bitset(PRIV_RESTRICTEXPAND, PrivacyFlags))
1543                         {
1544                                 /*
1545                                 **  If -bv and RestrictExpand,
1546                                 **  drop privs to prevent normal
1547                                 **  users from reading private
1548                                 **  aliases/forwards/:include:s
1549                                 */
1550
1551                                 if (tTd(65, 1))
1552                                         sm_dprintf("Drop privs for user %d attempt to expand (RestrictExpand)\n",
1553                                                    (int) RealUid);
1554
1555                                 dp = drop_privileges(true);
1556
1557                                 /* Fake address safety */
1558                                 if (tTd(65, 1))
1559                                         sm_dprintf("Faking DontBlameSendmail=NonRootSafeAddr\n");
1560                                 setbitn(DBS_NONROOTSAFEADDR, DontBlameSendmail);
1561
1562                                 if (dp != EX_OK)
1563                                 {
1564                                         if (tTd(65, 1))
1565                                                 sm_dprintf("Failed to drop privs for user %d attempt to expand, exiting\n",
1566                                                            (int) RealUid);
1567                                         CurEnv->e_id = NULL;
1568                                         finis(true, true, dp);
1569                                         /* NOTREACHED */
1570                                 }
1571                         }
1572                         break;
1573
1574                   case MD_TEST:
1575                   case MD_CHECKCONFIG:
1576                   case MD_PRINT:
1577                   case MD_PRINTNQE:
1578                   case MD_FREEZE:
1579                   case MD_HOSTSTAT:
1580                         /* Nothing special to check */
1581                         break;
1582
1583                   case MD_INITALIAS:
1584                         if (!wordinclass(RealUserName, 't'))
1585                         {
1586                                 if (tTd(65, 1))
1587                                         sm_dprintf("Deny user %d attempt to rebuild the alias map\n",
1588                                                    (int) RealUid);
1589                                 if (LogLevel > 1)
1590                                         sm_syslog(LOG_ALERT, NOQID,
1591                                                   "user %d attempted to rebuild the alias map",
1592                                                   (int) RealUid);
1593                                 HoldErrs = false;
1594                                 usrerr("Permission denied (real uid not trusted)");
1595                                 finis(false, true, EX_USAGE);
1596                                 /* NOTREACHED */
1597                         }
1598                         if (UseMSP)
1599                         {
1600                                 HoldErrs = false;
1601                                 usrerr("User %d cannot rebuild aliases in mail submission program",
1602                                        (int) RealUid);
1603                                 finis(false, true, EX_USAGE);
1604                                 /* NOTREACHED */
1605                         }
1606                         /* FALLTHROUGH */
1607
1608                   default:
1609                         if (bitset(PRIV_RESTRICTEXPAND, PrivacyFlags) &&
1610                             Verbose != 0)
1611                         {
1612                                 /*
1613                                 **  If -v and RestrictExpand, reset
1614                                 **  Verbose to prevent normal users
1615                                 **  from seeing the expansion of
1616                                 **  aliases/forwards/:include:s
1617                                 */
1618
1619                                 if (tTd(65, 1))
1620                                         sm_dprintf("Dropping verbosity for user %d (RestrictExpand)\n",
1621                                                    (int) RealUid);
1622                                 Verbose = 0;
1623                         }
1624                         break;
1625                 }
1626         }
1627
1628         if (MeToo)
1629                 BlankEnvelope.e_flags |= EF_METOO;
1630
1631         switch (OpMode)
1632         {
1633           case MD_TEST:
1634                 /* don't have persistent host status in test mode */
1635                 HostStatDir = NULL;
1636                 /* FALLTHROUGH */
1637
1638           case MD_CHECKCONFIG:
1639                 if (Verbose == 0)
1640                         Verbose = 2;
1641                 BlankEnvelope.e_errormode = EM_PRINT;
1642                 HoldErrs = false;
1643                 break;
1644
1645           case MD_VERIFY:
1646                 BlankEnvelope.e_errormode = EM_PRINT;
1647                 HoldErrs = false;
1648                 /* arrange to exit cleanly on hangup signal */
1649                 if (sm_signal(SIGHUP, SIG_IGN) == (sigfunc_t) SIG_DFL)
1650                         (void) sm_signal(SIGHUP, intsig);
1651                 if (geteuid() != 0)
1652                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
1653                                              "Notice: -bv may give misleading output for non-privileged user\n");
1654                 break;
1655
1656           case MD_FGDAEMON:
1657                 run_in_foreground = true;
1658                 set_op_mode(MD_DAEMON);
1659                 /* FALLTHROUGH */
1660
1661           case MD_DAEMON:
1662                 vendor_daemon_setup(&BlankEnvelope);
1663
1664                 /* remove things that don't make sense in daemon mode */
1665                 FullName = NULL;
1666                 GrabTo = false;
1667
1668                 /* arrange to restart on hangup signal */
1669                 if (SaveArgv[0] == NULL || SaveArgv[0][0] != '/')
1670                         sm_syslog(LOG_WARNING, NOQID,
1671                                   "daemon invoked without full pathname; kill -1 won't work");
1672                 break;
1673
1674           case MD_INITALIAS:
1675                 Verbose = 2;
1676                 BlankEnvelope.e_errormode = EM_PRINT;
1677                 HoldErrs = false;
1678                 /* FALLTHROUGH */
1679
1680           default:
1681                 /* arrange to exit cleanly on hangup signal */
1682                 if (sm_signal(SIGHUP, SIG_IGN) == (sigfunc_t) SIG_DFL)
1683                         (void) sm_signal(SIGHUP, intsig);
1684                 break;
1685         }
1686
1687         /* special considerations for FullName */
1688         if (FullName != NULL)
1689         {
1690                 char *full = NULL;
1691
1692                 /* full names can't have newlines */
1693                 if (strchr(FullName, '\n') != NULL)
1694                 {
1695                         full = newstr(denlstring(FullName, true, true));
1696                         FullName = full;
1697                 }
1698
1699                 /* check for characters that may have to be quoted */
1700                 if (!rfc822_string(FullName))
1701                 {
1702                         /*
1703                         **  Quote a full name with special characters
1704                         **  as a comment so crackaddr() doesn't destroy
1705                         **  the name portion of the address.
1706                         */
1707
1708                         FullName = addquotes(FullName, NULL);
1709                         if (full != NULL)
1710                                 sm_free(full);  /* XXX */
1711                 }
1712         }
1713
1714         /* do heuristic mode adjustment */
1715         if (Verbose)
1716         {
1717                 /* turn off noconnect option */
1718                 setoption('c', "F", true, false, &BlankEnvelope);
1719
1720                 /* turn on interactive delivery */
1721                 setoption('d', "", true, false, &BlankEnvelope);
1722         }
1723
1724 #ifdef VENDOR_CODE
1725         /* check for vendor mismatch */
1726         if (VendorCode != VENDOR_CODE)
1727         {
1728                 message("Warning: .cf file vendor code mismatch: sendmail expects vendor %s, .cf file vendor is %s",
1729                         getvendor(VENDOR_CODE), getvendor(VendorCode));
1730         }
1731 #endif /* VENDOR_CODE */
1732
1733         /* check for out of date configuration level */
1734         if (ConfigLevel < MAXCONFIGLEVEL)
1735         {
1736                 message("Warning: .cf file is out of date: sendmail %s supports version %d, .cf file is version %d",
1737                         Version, MAXCONFIGLEVEL, ConfigLevel);
1738         }
1739
1740         if (ConfigLevel < 3)
1741                 UseErrorsTo = true;
1742
1743         /* set options that were previous macros */
1744         if (SmtpGreeting == NULL)
1745         {
1746                 if (ConfigLevel < 7 &&
1747                     (p = macvalue('e', &BlankEnvelope)) != NULL)
1748                         SmtpGreeting = newstr(p);
1749                 else
1750                         SmtpGreeting = "\201j Sendmail \201v ready at \201b";
1751         }
1752         if (UnixFromLine == NULL)
1753         {
1754                 if (ConfigLevel < 7 &&
1755                     (p = macvalue('l', &BlankEnvelope)) != NULL)
1756                         UnixFromLine = newstr(p);
1757                 else
1758                         UnixFromLine = "From \201g  \201d";
1759         }
1760         SmtpError[0] = '\0';
1761
1762         /* our name for SMTP codes */
1763         expand("\201j", jbuf, sizeof(jbuf), &BlankEnvelope);
1764         if (jbuf[0] == '\0')
1765                 PSTRSET(MyHostName, "localhost");
1766         else
1767                 PSTRSET(MyHostName, jbuf);
1768         if (strchr(MyHostName, '.') == NULL)
1769                 message("WARNING: local host name (%s) is not qualified; see cf/README: WHO AM I?",
1770                         MyHostName);
1771
1772         /* make certain that this name is part of the $=w class */
1773         setclass('w', MyHostName);
1774
1775         /* fill in the structure of the *default* queue */
1776         st = stab("mqueue", ST_QUEUE, ST_FIND);
1777         if (st == NULL)
1778                 syserr("No default queue (mqueue) defined");
1779         else
1780                 set_def_queueval(st->s_quegrp, true);
1781
1782         /* the indices of built-in mailers */
1783         st = stab("local", ST_MAILER, ST_FIND);
1784         if (st != NULL)
1785                 LocalMailer = st->s_mailer;
1786         else if (OpMode != MD_TEST || !warn_C_flag)
1787                 syserr("No local mailer defined");
1788
1789         st = stab("prog", ST_MAILER, ST_FIND);
1790         if (st == NULL)
1791                 syserr("No prog mailer defined");
1792         else
1793         {
1794                 ProgMailer = st->s_mailer;
1795                 clrbitn(M_MUSER, ProgMailer->m_flags);
1796         }
1797
1798         st = stab("*file*", ST_MAILER, ST_FIND);
1799         if (st == NULL)
1800                 syserr("No *file* mailer defined");
1801         else
1802         {
1803                 FileMailer = st->s_mailer;
1804                 clrbitn(M_MUSER, FileMailer->m_flags);
1805         }
1806
1807         st = stab("*include*", ST_MAILER, ST_FIND);
1808         if (st == NULL)
1809                 syserr("No *include* mailer defined");
1810         else
1811                 InclMailer = st->s_mailer;
1812
1813         if (ConfigLevel < 6)
1814         {
1815                 /* heuristic tweaking of local mailer for back compat */
1816                 if (LocalMailer != NULL)
1817                 {
1818                         setbitn(M_ALIASABLE, LocalMailer->m_flags);
1819                         setbitn(M_HASPWENT, LocalMailer->m_flags);
1820                         setbitn(M_TRYRULESET5, LocalMailer->m_flags);
1821                         setbitn(M_CHECKINCLUDE, LocalMailer->m_flags);
1822                         setbitn(M_CHECKPROG, LocalMailer->m_flags);
1823                         setbitn(M_CHECKFILE, LocalMailer->m_flags);
1824                         setbitn(M_CHECKUDB, LocalMailer->m_flags);
1825                 }
1826                 if (ProgMailer != NULL)
1827                         setbitn(M_RUNASRCPT, ProgMailer->m_flags);
1828                 if (FileMailer != NULL)
1829                         setbitn(M_RUNASRCPT, FileMailer->m_flags);
1830         }
1831         if (ConfigLevel < 7)
1832         {
1833                 if (LocalMailer != NULL)
1834                         setbitn(M_VRFY250, LocalMailer->m_flags);
1835                 if (ProgMailer != NULL)
1836                         setbitn(M_VRFY250, ProgMailer->m_flags);
1837                 if (FileMailer != NULL)
1838                         setbitn(M_VRFY250, FileMailer->m_flags);
1839         }
1840
1841         /* MIME Content-Types that cannot be transfer encoded */
1842         setclass('n', "multipart/signed");
1843
1844         /* MIME message/xxx subtypes that can be treated as messages */
1845         setclass('s', "rfc822");
1846
1847         /* MIME Content-Transfer-Encodings that can be encoded */
1848         setclass('e', "7bit");
1849         setclass('e', "8bit");
1850         setclass('e', "binary");
1851
1852 #ifdef USE_B_CLASS
1853         /* MIME Content-Types that should be treated as binary */
1854         setclass('b', "image");
1855         setclass('b', "audio");
1856         setclass('b', "video");
1857         setclass('b', "application/octet-stream");
1858 #endif /* USE_B_CLASS */
1859
1860         /* MIME headers which have fields to check for overflow */
1861         setclass(macid("{checkMIMEFieldHeaders}"), "content-disposition");
1862         setclass(macid("{checkMIMEFieldHeaders}"), "content-type");
1863
1864         /* MIME headers to check for length overflow */
1865         setclass(macid("{checkMIMETextHeaders}"), "content-description");
1866
1867         /* MIME headers to check for overflow and rebalance */
1868         setclass(macid("{checkMIMEHeaders}"), "content-disposition");
1869         setclass(macid("{checkMIMEHeaders}"), "content-id");
1870         setclass(macid("{checkMIMEHeaders}"), "content-transfer-encoding");
1871         setclass(macid("{checkMIMEHeaders}"), "content-type");
1872         setclass(macid("{checkMIMEHeaders}"), "mime-version");
1873
1874         /* Macros to save in the queue file -- don't remove any */
1875         setclass(macid("{persistentMacros}"), "r");
1876         setclass(macid("{persistentMacros}"), "s");
1877         setclass(macid("{persistentMacros}"), "_");
1878         setclass(macid("{persistentMacros}"), "{if_addr}");
1879         setclass(macid("{persistentMacros}"), "{daemon_flags}");
1880
1881         /* operate in queue directory */
1882         if (QueueDir == NULL || *QueueDir == '\0')
1883         {
1884                 if (OpMode != MD_TEST)
1885                 {
1886                         syserr("QueueDirectory (Q) option must be set");
1887                         ExitStat = EX_CONFIG;
1888                 }
1889         }
1890         else
1891         {
1892                 if (OpMode != MD_TEST)
1893                         setup_queues(OpMode == MD_DAEMON);
1894         }
1895
1896         /* check host status directory for validity */
1897         if (HostStatDir != NULL && !path_is_dir(HostStatDir, false))
1898         {
1899                 /* cannot use this value */
1900                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
1901                                      "Warning: Cannot use HostStatusDirectory = %s: %s\n",
1902                                      HostStatDir, sm_errstring(errno));
1903                 HostStatDir = NULL;
1904         }
1905
1906         if (OpMode == MD_QUEUERUN &&
1907             RealUid != 0 && bitset(PRIV_RESTRICTQRUN, PrivacyFlags))
1908         {
1909                 struct stat stbuf;
1910
1911                 /* check to see if we own the queue directory */
1912                 if (stat(".", &stbuf) < 0)
1913                         syserr("main: cannot stat %s", QueueDir);
1914                 if (stbuf.st_uid != RealUid)
1915                 {
1916                         /* nope, really a botch */
1917                         HoldErrs = false;
1918                         usrerr("You do not have permission to process the queue");
1919                         finis(false, true, EX_NOPERM);
1920                         /* NOTREACHED */
1921                 }
1922         }
1923
1924 #if MILTER
1925         /* sanity checks on milter filters */
1926         if (OpMode == MD_DAEMON || OpMode == MD_SMTP)
1927         {
1928                 milter_config(InputFilterList, InputFilters, MAXFILTERS);
1929                 setup_daemon_milters();
1930         }
1931 #endif /* MILTER */
1932
1933         /* Convert queuegroup string to qgrp number */
1934         if (queuegroup != NULL)
1935         {
1936                 qgrp = name2qid(queuegroup);
1937                 if (qgrp == NOQGRP)
1938                 {
1939                         HoldErrs = false;
1940                         usrerr("Queue group %s unknown", queuegroup);
1941                         finis(false, true, ExitStat);
1942                         /* NOTREACHED */
1943                 }
1944         }
1945
1946         /* if checking config or have had errors so far, exit now */
1947         if (OpMode == MD_CHECKCONFIG || (ExitStat != EX_OK && OpMode != MD_TEST))
1948         {
1949                 finis(false, true, ExitStat);
1950                 /* NOTREACHED */
1951         }
1952
1953 #if SASL
1954         /* sendmail specific SASL initialization */
1955         sm_sasl_init();
1956 #endif /* SASL */
1957
1958 #if XDEBUG
1959         checkfd012("before main() initmaps");
1960 #endif /* XDEBUG */
1961
1962         /*
1963         **  Do operation-mode-dependent initialization.
1964         */
1965
1966         switch (OpMode)
1967         {
1968           case MD_PRINT:
1969                 /* print the queue */
1970                 HoldErrs = false;
1971                 (void) dropenvelope(&BlankEnvelope, true, false);
1972                 (void) sm_signal(SIGPIPE, sigpipe);
1973                 if (qgrp != NOQGRP)
1974                 {
1975                         int j;
1976
1977                         /* Selecting a particular queue group to run */
1978                         for (j = 0; j < Queue[qgrp]->qg_numqueues; j++)
1979                         {
1980                                 if (StopRequest)
1981                                         stop_sendmail();
1982                                 (void) print_single_queue(qgrp, j);
1983                         }
1984                         finis(false, true, EX_OK);
1985                         /* NOTREACHED */
1986                 }
1987                 printqueue();
1988                 finis(false, true, EX_OK);
1989                 /* NOTREACHED */
1990                 break;
1991
1992           case MD_PRINTNQE:
1993                 /* print number of entries in queue */
1994                 (void) dropenvelope(&BlankEnvelope, true, false);
1995                 (void) sm_signal(SIGPIPE, sigpipe);
1996                 printnqe(smioout, NULL);
1997                 finis(false, true, EX_OK);
1998                 /* NOTREACHED */
1999                 break;
2000
2001           case MD_QUEUERUN:
2002                 /* only handle quarantining here */
2003                 if (quarantining == NULL)
2004                         break;
2005
2006                 if (QueueMode != QM_QUARANTINE &&
2007                     QueueMode != QM_NORMAL)
2008                 {
2009                         HoldErrs = false;
2010                         usrerr("Can not use -Q with -q%c", QueueMode);
2011                         ExitStat = EX_USAGE;
2012                         finis(false, true, ExitStat);
2013                         /* NOTREACHED */
2014                 }
2015                 quarantine_queue(quarantining, qgrp);
2016                 finis(false, true, EX_OK);
2017                 break;
2018
2019           case MD_HOSTSTAT:
2020                 (void) sm_signal(SIGPIPE, sigpipe);
2021                 (void) mci_traverse_persistent(mci_print_persistent, NULL);
2022                 finis(false, true, EX_OK);
2023                 /* NOTREACHED */
2024                 break;
2025
2026           case MD_PURGESTAT:
2027                 (void) mci_traverse_persistent(mci_purge_persistent, NULL);
2028                 finis(false, true, EX_OK);
2029                 /* NOTREACHED */
2030                 break;
2031
2032           case MD_INITALIAS:
2033                 /* initialize maps */
2034                 initmaps();
2035                 finis(false, true, ExitStat);
2036                 /* NOTREACHED */
2037                 break;
2038
2039           case MD_SMTP:
2040           case MD_DAEMON:
2041                 /* reset DSN parameters */
2042                 DefaultNotify = QPINGONFAILURE|QPINGONDELAY;
2043                 macdefine(&BlankEnvelope.e_macro, A_PERM,
2044                           macid("{dsn_notify}"), NULL);
2045                 BlankEnvelope.e_envid = NULL;
2046                 macdefine(&BlankEnvelope.e_macro, A_PERM,
2047                           macid("{dsn_envid}"), NULL);
2048                 BlankEnvelope.e_flags &= ~(EF_RET_PARAM|EF_NO_BODY_RETN);
2049                 macdefine(&BlankEnvelope.e_macro, A_PERM,
2050                           macid("{dsn_ret}"), NULL);
2051
2052                 /* don't open maps for daemon -- done below in child */
2053                 break;
2054         }
2055
2056         if (tTd(0, 15))
2057         {
2058                 /* print configuration table (or at least part of it) */
2059                 if (tTd(0, 90))
2060                         printrules();
2061                 for (i = 0; i < MAXMAILERS; i++)
2062                 {
2063                         if (Mailer[i] != NULL)
2064                                 printmailer(sm_debug_file(), Mailer[i]);
2065                 }
2066         }
2067
2068         /*
2069         **  Switch to the main envelope.
2070         */
2071
2072         CurEnv = newenvelope(&MainEnvelope, &BlankEnvelope,
2073                              sm_rpool_new_x(NULL));
2074         MainEnvelope.e_flags = BlankEnvelope.e_flags;
2075
2076         /*
2077         **  If test mode, read addresses from stdin and process.
2078         */
2079
2080         if (OpMode == MD_TEST)
2081         {
2082                 if (isatty(sm_io_getinfo(smioin, SM_IO_WHAT_FD, NULL)))
2083                         Verbose = 2;
2084
2085                 if (Verbose)
2086                 {
2087                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
2088                                      "ADDRESS TEST MODE (ruleset 3 NOT automatically invoked)\n");
2089                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
2090                                      "Enter <ruleset> <address>\n");
2091                 }
2092                 macdefine(&(MainEnvelope.e_macro), A_PERM,
2093                           macid("{addr_type}"), "e r");
2094                 for (;;)
2095                 {
2096                         SM_TRY
2097                         {
2098                                 (void) sm_signal(SIGINT, intindebug);
2099                                 (void) sm_releasesignal(SIGINT);
2100                                 if (Verbose == 2)
2101                                         (void) sm_io_fprintf(smioout,
2102                                                              SM_TIME_DEFAULT,
2103                                                              "> ");
2104                                 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
2105                                 if (sm_io_fgets(smioin, SM_TIME_DEFAULT, buf,
2106                                                 sizeof(buf)) == NULL)
2107                                         testmodeline("/quit", &MainEnvelope);
2108                                 p = strchr(buf, '\n');
2109                                 if (p != NULL)
2110                                         *p = '\0';
2111                                 if (Verbose < 2)
2112                                         (void) sm_io_fprintf(smioout,
2113                                                              SM_TIME_DEFAULT,
2114                                                              "> %s\n", buf);
2115                                 testmodeline(buf, &MainEnvelope);
2116                         }
2117                         SM_EXCEPT(exc, "[!F]*")
2118                         {
2119                                 /*
2120                                 **  8.10 just prints \n on interrupt.
2121                                 **  I'm printing the exception here in case
2122                                 **  sendmail is extended to raise additional
2123                                 **  exceptions in this context.
2124                                 */
2125
2126                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
2127                                                      "\n");
2128                                 sm_exc_print(exc, smioout);
2129                         }
2130                         SM_END_TRY
2131                 }
2132         }
2133
2134 #if STARTTLS
2135         tls_ok = true;
2136         if (OpMode == MD_QUEUERUN || OpMode == MD_DELIVER ||
2137             OpMode == MD_ARPAFTP)
2138         {
2139                 /* check whether STARTTLS is turned off for the client */
2140                 if (chkclientmodifiers(D_NOTLS))
2141                         tls_ok = false;
2142         }
2143         else if (OpMode == MD_DAEMON || OpMode == MD_FGDAEMON ||
2144                  OpMode == MD_SMTP)
2145         {
2146                 /* check whether STARTTLS is turned off */
2147                 if (chkdaemonmodifiers(D_NOTLS) && chkclientmodifiers(D_NOTLS))
2148                         tls_ok = false;
2149         }
2150         else    /* other modes don't need STARTTLS */
2151                 tls_ok = false;
2152
2153         if (tls_ok)
2154         {
2155                 /* basic TLS initialization */
2156                 tls_ok = init_tls_library();
2157         }
2158
2159         if (!tls_ok && (OpMode == MD_QUEUERUN || OpMode == MD_DELIVER))
2160         {
2161                 /* disable TLS for client */
2162                 setclttls(false);
2163         }
2164 #endif /* STARTTLS */
2165
2166         /*
2167         **  If collecting stuff from the queue, go start doing that.
2168         */
2169
2170         if (OpMode == MD_QUEUERUN && QueueIntvl == 0)
2171         {
2172                 pid_t pid = -1;
2173
2174 #if STARTTLS
2175                 /* init TLS for client, ignore result for now */
2176                 (void) initclttls(tls_ok);
2177 #endif /* STARTTLS */
2178
2179                 /*
2180                 **  The parent process of the caller of runqueue() needs
2181                 **  to stay around for a possible SIGTERM. The SIGTERM will
2182                 **  tell this process that all of the queue runners children
2183                 **  need to be sent SIGTERM as well. At the same time, we
2184                 **  want to return control to the command line. So we do an
2185                 **  extra fork().
2186                 */
2187
2188                 if (Verbose || foregroundqueue || (pid = fork()) <= 0)
2189                 {
2190                         /*
2191                         **  If the fork() failed we should still try to do
2192                         **  the queue run. If it succeeded then the child
2193                         **  is going to start the run and wait for all
2194                         **  of the children to finish.
2195                         */
2196
2197                         if (pid == 0)
2198                         {
2199                                 /* Reset global flags */
2200                                 RestartRequest = NULL;
2201                                 ShutdownRequest = NULL;
2202                                 PendingSignal = 0;
2203
2204                                 /* disconnect from terminal */
2205                                 disconnect(2, CurEnv);
2206                         }
2207
2208                         CurrentPid = getpid();
2209                         if (qgrp != NOQGRP)
2210                         {
2211                                 int rwgflags = RWG_NONE;
2212
2213                                 /*
2214                                 **  To run a specific queue group mark it to
2215                                 **  be run, select the work group it's in and
2216                                 **  increment the work counter.
2217                                 */
2218
2219                                 for (i = 0; i < NumQueue && Queue[i] != NULL;
2220                                      i++)
2221                                         Queue[i]->qg_nextrun = (time_t) -1;
2222                                 Queue[qgrp]->qg_nextrun = 0;
2223                                 if (Verbose)
2224                                         rwgflags |= RWG_VERBOSE;
2225                                 if (queuepersistent)
2226                                         rwgflags |= RWG_PERSISTENT;
2227                                 rwgflags |= RWG_FORCE;
2228                                 (void) run_work_group(Queue[qgrp]->qg_wgrp,
2229                                                       rwgflags);
2230                         }
2231                         else
2232                                 (void) runqueue(false, Verbose,
2233                                                 queuepersistent, true);
2234
2235                         /* set the title to make it easier to find */
2236                         sm_setproctitle(true, CurEnv, "Queue control");
2237                         (void) sm_signal(SIGCHLD, SIG_DFL);
2238                         while (CurChildren > 0)
2239                         {
2240                                 int status;
2241                                 pid_t ret;
2242
2243                                 errno = 0;
2244                                 while ((ret = sm_wait(&status)) <= 0)
2245                                 {
2246                                         if (errno == ECHILD)
2247                                         {
2248                                                 /*
2249                                                 **  Oops... something got messed
2250                                                 **  up really bad. Waiting for
2251                                                 **  non-existent children
2252                                                 **  shouldn't happen. Let's get
2253                                                 **  out of here.
2254                                                 */
2255
2256                                                 CurChildren = 0;
2257                                                 break;
2258                                         }
2259                                         continue;
2260                                 }
2261
2262                                 /* something is really really wrong */
2263                                 if (errno == ECHILD)
2264                                 {
2265                                         sm_syslog(LOG_ERR, NOQID,
2266                                                   "queue control process: lost all children: wait returned ECHILD");
2267                                         break;
2268                                 }
2269
2270                                 /* Only drop when a child gives status */
2271                                 if (WIFSTOPPED(status))
2272                                         continue;
2273
2274                                 proc_list_drop(ret, status, NULL);
2275                         }
2276                 }
2277                 finis(true, true, ExitStat);
2278                 /* NOTREACHED */
2279         }
2280
2281 # if SASL
2282         if (OpMode == MD_SMTP || OpMode == MD_DAEMON)
2283         {
2284                 /* check whether AUTH is turned off for the server */
2285                 if (!chkdaemonmodifiers(D_NOAUTH) &&
2286                     (i = sasl_server_init(srvcallbacks, "Sendmail")) != SASL_OK)
2287                         syserr("!sasl_server_init failed! [%s]",
2288                                 sasl_errstring(i, NULL, NULL));
2289         }
2290 # endif /* SASL */
2291
2292         if (OpMode == MD_SMTP)
2293         {
2294                 proc_list_add(CurrentPid, "Sendmail SMTP Agent",
2295                               PROC_DAEMON, 0, -1, NULL);
2296
2297                 /* clean up background delivery children */
2298                 (void) sm_signal(SIGCHLD, reapchild);
2299         }
2300
2301         /*
2302         **  If a daemon, wait for a request.
2303         **      getrequests will always return in a child.
2304         **      If we should also be processing the queue, start
2305         **              doing it in background.
2306         **      We check for any errors that might have happened
2307         **              during startup.
2308         */
2309
2310         if (OpMode == MD_DAEMON || QueueIntvl > 0)
2311         {
2312                 char dtype[200];
2313
2314                 /* avoid cleanup in finis(), DaemonPid will be set below */
2315                 DaemonPid = 0;
2316                 if (!run_in_foreground && !tTd(99, 100))
2317                 {
2318                         /* put us in background */
2319                         i = fork();
2320                         if (i < 0)
2321                                 syserr("daemon: cannot fork");
2322                         if (i != 0)
2323                         {
2324                                 finis(false, true, EX_OK);
2325                                 /* NOTREACHED */
2326                         }
2327
2328                         /*
2329                         **  Initialize exception stack and default exception
2330                         **  handler for child process.
2331                         */
2332
2333                         /* Reset global flags */
2334                         RestartRequest = NULL;
2335                         RestartWorkGroup = false;
2336                         ShutdownRequest = NULL;
2337                         PendingSignal = 0;
2338                         CurrentPid = getpid();
2339
2340                         sm_exc_newthread(fatal_error);
2341
2342                         /* disconnect from our controlling tty */
2343                         disconnect(2, &MainEnvelope);
2344                 }
2345
2346                 dtype[0] = '\0';
2347                 if (OpMode == MD_DAEMON)
2348                 {
2349                         (void) sm_strlcat(dtype, "+SMTP", sizeof(dtype));
2350                         DaemonPid = CurrentPid;
2351                 }
2352                 if (QueueIntvl > 0)
2353                 {
2354                         (void) sm_strlcat2(dtype,
2355                                            queuepersistent
2356                                            ? "+persistent-queueing@"
2357                                            : "+queueing@",
2358                                            pintvl(QueueIntvl, true),
2359                                            sizeof(dtype));
2360                 }
2361                 if (tTd(0, 1))
2362                         (void) sm_strlcat(dtype, "+debugging", sizeof(dtype));
2363
2364                 sm_syslog(LOG_INFO, NOQID,
2365                           "starting daemon (%s): %s", Version, dtype + 1);
2366 #if XLA
2367                 xla_create_file();
2368 #endif /* XLA */
2369
2370                 /* save daemon type in a macro for possible PidFile use */
2371                 macdefine(&BlankEnvelope.e_macro, A_TEMP,
2372                         macid("{daemon_info}"), dtype + 1);
2373
2374                 /* save queue interval in a macro for possible PidFile use */
2375                 macdefine(&MainEnvelope.e_macro, A_TEMP,
2376                         macid("{queue_interval}"), pintvl(QueueIntvl, true));
2377
2378                 /* workaround: can't seem to release the signal in the parent */
2379                 (void) sm_signal(SIGHUP, sighup);
2380                 (void) sm_releasesignal(SIGHUP);
2381                 (void) sm_signal(SIGTERM, sigterm);
2382
2383                 if (QueueIntvl > 0)
2384                 {
2385 #if _FFR_RUNPQG
2386                         if (qgrp != NOQGRP)
2387                         {
2388                                 int rwgflags = RWG_NONE;
2389
2390                                 /*
2391                                 **  To run a specific queue group mark it to
2392                                 **  be run, select the work group it's in and
2393                                 **  increment the work counter.
2394                                 */
2395
2396                                 for (i = 0; i < NumQueue && Queue[i] != NULL;
2397                                      i++)
2398                                         Queue[i]->qg_nextrun = (time_t) -1;
2399                                 Queue[qgrp]->qg_nextrun = 0;
2400                                 if (Verbose)
2401                                         rwgflags |= RWG_VERBOSE;
2402                                 if (queuepersistent)
2403                                         rwgflags |= RWG_PERSISTENT;
2404                                 rwgflags |= RWG_FORCE;
2405                                 (void) run_work_group(Queue[qgrp]->qg_wgrp,
2406                                                       rwgflags);
2407                         }
2408                         else
2409 #endif /* _FFR_RUNPQG */
2410                                 (void) runqueue(true, false, queuepersistent,
2411                                                 true);
2412
2413                         /*
2414                         **  If queuepersistent but not in daemon mode then
2415                         **  we're going to do the queue runner monitoring here.
2416                         **  If in daemon mode then the monitoring will happen
2417                         **  elsewhere.
2418                         */
2419
2420                         if (OpMode != MD_DAEMON && queuepersistent)
2421                         {
2422                                 /*
2423                                 **  Write the pid to file
2424                                 **  XXX Overwrites sendmail.pid
2425                                 */
2426
2427                                 log_sendmail_pid(&MainEnvelope);
2428
2429                                 /* set the title to make it easier to find */
2430                                 sm_setproctitle(true, CurEnv, "Queue control");
2431                                 (void) sm_signal(SIGCHLD, SIG_DFL);
2432                                 while (CurChildren > 0)
2433                                 {
2434                                         int status;
2435                                         pid_t ret;
2436                                         int group;
2437
2438                                         CHECK_RESTART;
2439                                         errno = 0;
2440                                         while ((ret = sm_wait(&status)) <= 0)
2441                                         {
2442                                                 /*
2443                                                 **  Waiting for non-existent
2444                                                 **  children shouldn't happen.
2445                                                 **  Let's get out of here if
2446                                                 **  it occurs.
2447                                                 */
2448
2449                                                 if (errno == ECHILD)
2450                                                 {
2451                                                         CurChildren = 0;
2452                                                         break;
2453                                                 }
2454                                                 continue;
2455                                         }
2456
2457                                         /* something is really really wrong */
2458                                         if (errno == ECHILD)
2459                                         {
2460                                                 sm_syslog(LOG_ERR, NOQID,
2461                                                           "persistent queue runner control process: lost all children: wait returned ECHILD");
2462                                                 break;
2463                                         }
2464
2465                                         if (WIFSTOPPED(status))
2466                                                 continue;
2467
2468                                         /* Probe only on a child status */
2469                                         proc_list_drop(ret, status, &group);
2470
2471                                         if (WIFSIGNALED(status))
2472                                         {
2473                                                 if (WCOREDUMP(status))
2474                                                 {
2475                                                         sm_syslog(LOG_ERR, NOQID,
2476                                                                   "persistent queue runner=%d core dumped, signal=%d",
2477                                                                   group, WTERMSIG(status));
2478
2479                                                         /* don't restart this */
2480                                                         mark_work_group_restart(
2481                                                                 group, -1);
2482                                                         continue;
2483                                                 }
2484
2485                                                 sm_syslog(LOG_ERR, NOQID,
2486                                                           "persistent queue runner=%d died, pid=%ld, signal=%d",
2487                                                           group, (long) ret,
2488                                                           WTERMSIG(status));
2489                                         }
2490
2491                                         /*
2492                                         **  When debugging active, don't
2493                                         **  restart the persistent queues.
2494                                         **  But do log this as info.
2495                                         */
2496
2497                                         if (sm_debug_active(&DebugNoPRestart,
2498                                                             1))
2499                                         {
2500                                                 sm_syslog(LOG_DEBUG, NOQID,
2501                                                           "persistent queue runner=%d, exited",
2502                                                           group);
2503                                                 mark_work_group_restart(group,
2504                                                                         -1);
2505                                         }
2506                                         CHECK_RESTART;
2507                                 }
2508                                 finis(true, true, ExitStat);
2509                                 /* NOTREACHED */
2510                         }
2511
2512                         if (OpMode != MD_DAEMON)
2513                         {
2514                                 char qtype[200];
2515
2516                                 /*
2517                                 **  Write the pid to file
2518                                 **  XXX Overwrites sendmail.pid
2519                                 */
2520
2521                                 log_sendmail_pid(&MainEnvelope);
2522
2523                                 /* set the title to make it easier to find */
2524                                 qtype[0] = '\0';
2525                                 (void) sm_strlcpyn(qtype, sizeof(qtype), 4,
2526                                                    "Queue runner@",
2527                                                    pintvl(QueueIntvl, true),
2528                                                    " for ",
2529                                                    QueueDir);
2530                                 sm_setproctitle(true, CurEnv, qtype);
2531                                 for (;;)
2532                                 {
2533                                         (void) pause();
2534
2535                                         CHECK_RESTART;
2536
2537                                         if (doqueuerun())
2538                                                 (void) runqueue(true, false,
2539                                                                 false, false);
2540                                 }
2541                         }
2542                 }
2543                 (void) dropenvelope(&MainEnvelope, true, false);
2544
2545 #if STARTTLS
2546                 /* init TLS for server, ignore result for now */
2547                 (void) initsrvtls(tls_ok);
2548 #endif /* STARTTLS */
2549
2550         nextreq:
2551                 p_flags = getrequests(&MainEnvelope);
2552
2553                 /* drop privileges */
2554                 (void) drop_privileges(false);
2555
2556                 /*
2557                 **  Get authentication data
2558                 **  Set _ macro in BlankEnvelope before calling newenvelope().
2559                 */
2560
2561                 authinfo = getauthinfo(sm_io_getinfo(InChannel, SM_IO_WHAT_FD,
2562                                                      NULL), &forged);
2563                 macdefine(&BlankEnvelope.e_macro, A_TEMP, '_', authinfo);
2564                 if (tTd(75, 9))
2565                         sm_syslog(LOG_INFO, NOQID,
2566                                 "main: where=after_getauthinfo, RealHostAddr=%s",
2567                                 anynet_ntoa(&RealHostAddr));
2568
2569                 /* at this point we are in a child: reset state */
2570                 sm_rpool_free(MainEnvelope.e_rpool);
2571                 (void) newenvelope(&MainEnvelope, &MainEnvelope,
2572                                    sm_rpool_new_x(NULL));
2573         }
2574
2575         if (LogLevel > 9)
2576         {
2577                 /* log connection information */
2578                 sm_syslog(LOG_INFO, NULL, "connect from %s", authinfo);
2579         }
2580
2581         /*
2582         **  If running SMTP protocol, start collecting and executing
2583         **  commands.  This will never return.
2584         */
2585
2586         if (OpMode == MD_SMTP || OpMode == MD_DAEMON)
2587         {
2588                 char pbuf[20];
2589
2590                 /*
2591                 **  Save some macros for check_* rulesets.
2592                 */
2593
2594                 if (forged)
2595                 {
2596                         char ipbuf[103];
2597
2598                         (void) sm_snprintf(ipbuf, sizeof(ipbuf), "[%.100s]",
2599                                            anynet_ntoa(&RealHostAddr));
2600                         macdefine(&BlankEnvelope.e_macro, A_TEMP,
2601                                   macid("{client_name}"), ipbuf);
2602                 }
2603                 else
2604                         macdefine(&BlankEnvelope.e_macro, A_PERM,
2605                                   macid("{client_name}"), RealHostName);
2606                 macdefine(&BlankEnvelope.e_macro, A_PERM,
2607                           macid("{client_ptr}"), RealHostName);
2608                 macdefine(&BlankEnvelope.e_macro, A_TEMP,
2609                           macid("{client_addr}"), anynet_ntoa(&RealHostAddr));
2610                 sm_getla();
2611
2612                 switch (RealHostAddr.sa.sa_family)
2613                 {
2614 #if NETINET
2615                   case AF_INET:
2616                         (void) sm_snprintf(pbuf, sizeof(pbuf), "%d",
2617                                            RealHostAddr.sin.sin_port);
2618                         break;
2619 #endif /* NETINET */
2620 #if NETINET6
2621                   case AF_INET6:
2622                         (void) sm_snprintf(pbuf, sizeof(pbuf), "%d",
2623                                            RealHostAddr.sin6.sin6_port);
2624                         break;
2625 #endif /* NETINET6 */
2626                   default:
2627                         (void) sm_snprintf(pbuf, sizeof(pbuf), "0");
2628                         break;
2629                 }
2630                 macdefine(&BlankEnvelope.e_macro, A_TEMP,
2631                         macid("{client_port}"), pbuf);
2632
2633                 if (OpMode == MD_DAEMON)
2634                 {
2635                         ENVELOPE *saved_env;
2636
2637                         /* validate the connection */
2638                         HoldErrs = true;
2639                         saved_env = CurEnv;
2640                         CurEnv = &BlankEnvelope;
2641                         nullserver = validate_connection(&RealHostAddr,
2642                                                 macvalue(macid("{client_name}"),
2643                                                         &BlankEnvelope),
2644                                                 &BlankEnvelope);
2645                         if (bitset(EF_DISCARD, BlankEnvelope.e_flags))
2646                                 MainEnvelope.e_flags |= EF_DISCARD;
2647                         CurEnv = saved_env;
2648                         HoldErrs = false;
2649                 }
2650                 else if (p_flags == NULL)
2651                 {
2652                         p_flags = (BITMAP256 *) xalloc(sizeof(*p_flags));
2653                         clrbitmap(p_flags);
2654                 }
2655 #if STARTTLS
2656                 if (OpMode == MD_SMTP)
2657                         (void) initsrvtls(tls_ok);
2658 #endif /* STARTTLS */
2659
2660                 /* turn off profiling */
2661                 SM_PROF(1);
2662                 smtp(nullserver, *p_flags, &MainEnvelope);
2663
2664                 if (tTd(93, 100))
2665                 {
2666                         /* turn off profiling */
2667                         SM_PROF(0);
2668                         if (OpMode == MD_DAEMON)
2669                                 goto nextreq;
2670                 }
2671         }
2672
2673         sm_rpool_free(MainEnvelope.e_rpool);
2674         clearenvelope(&MainEnvelope, false, sm_rpool_new_x(NULL));
2675         if (OpMode == MD_VERIFY)
2676         {
2677                 set_delivery_mode(SM_VERIFY, &MainEnvelope);
2678                 PostMasterCopy = NULL;
2679         }
2680         else
2681         {
2682                 /* interactive -- all errors are global */
2683                 MainEnvelope.e_flags |= EF_GLOBALERRS|EF_LOGSENDER;
2684         }
2685
2686         /*
2687         **  Do basic system initialization and set the sender
2688         */
2689
2690         initsys(&MainEnvelope);
2691         macdefine(&MainEnvelope.e_macro, A_PERM, macid("{ntries}"), "0");
2692         macdefine(&MainEnvelope.e_macro, A_PERM, macid("{nrcpts}"), "0");
2693         setsender(from, &MainEnvelope, NULL, '\0', false);
2694         if (warn_f_flag != '\0' && !wordinclass(RealUserName, 't') &&
2695             (!bitnset(M_LOCALMAILER, MainEnvelope.e_from.q_mailer->m_flags) ||
2696              strcmp(MainEnvelope.e_from.q_user, RealUserName) != 0))
2697         {
2698                 auth_warning(&MainEnvelope, "%s set sender to %s using -%c",
2699                              RealUserName, from, warn_f_flag);
2700 #if SASL
2701                 auth = false;
2702 #endif /* SASL */
2703         }
2704         if (auth)
2705         {
2706                 char *fv;
2707
2708                 /* set the initial sender for AUTH= to $f@$j */
2709                 fv = macvalue('f', &MainEnvelope);
2710                 if (fv == NULL || *fv == '\0')
2711                         MainEnvelope.e_auth_param = NULL;
2712                 else
2713                 {
2714                         if (strchr(fv, '@') == NULL)
2715                         {
2716                                 i = strlen(fv) + strlen(macvalue('j',
2717                                                         &MainEnvelope)) + 2;
2718                                 p = sm_malloc_x(i);
2719                                 (void) sm_strlcpyn(p, i, 3, fv, "@",
2720                                                    macvalue('j',
2721                                                             &MainEnvelope));
2722                         }
2723                         else
2724                                 p = sm_strdup_x(fv);
2725                         MainEnvelope.e_auth_param = sm_rpool_strdup_x(MainEnvelope.e_rpool,
2726                                                                       xtextify(p, "="));
2727                         sm_free(p);  /* XXX */
2728                 }
2729         }
2730         if (macvalue('s', &MainEnvelope) == NULL)
2731                 macdefine(&MainEnvelope.e_macro, A_PERM, 's', RealHostName);
2732
2733         av = argv + optind;
2734         if (*av == NULL && !GrabTo)
2735         {
2736                 MainEnvelope.e_to = NULL;
2737                 MainEnvelope.e_flags |= EF_GLOBALERRS;
2738                 HoldErrs = false;
2739                 SuperSafe = SAFE_NO;
2740                 usrerr("Recipient names must be specified");
2741
2742                 /* collect body for UUCP return */
2743                 if (OpMode != MD_VERIFY)
2744                         collect(InChannel, false, NULL, &MainEnvelope, true);
2745                 finis(true, true, EX_USAGE);
2746                 /* NOTREACHED */
2747         }
2748
2749         /*
2750         **  Scan argv and deliver the message to everyone.
2751         */
2752
2753         save_val = LogUsrErrs;
2754         LogUsrErrs = true;
2755         sendtoargv(av, &MainEnvelope);
2756         LogUsrErrs = save_val;
2757
2758         /* if we have had errors sofar, arrange a meaningful exit stat */
2759         if (Errors > 0 && ExitStat == EX_OK)
2760                 ExitStat = EX_USAGE;
2761
2762 #if _FFR_FIX_DASHT
2763         /*
2764         **  If using -t, force not sending to argv recipients, even
2765         **  if they are mentioned in the headers.
2766         */
2767
2768         if (GrabTo)
2769         {
2770                 ADDRESS *q;
2771
2772                 for (q = MainEnvelope.e_sendqueue; q != NULL; q = q->q_next)
2773                         q->q_state = QS_REMOVED;
2774         }
2775 #endif /* _FFR_FIX_DASHT */
2776
2777         /*
2778         **  Read the input mail.
2779         */
2780
2781         MainEnvelope.e_to = NULL;
2782         if (OpMode != MD_VERIFY || GrabTo)
2783         {
2784                 int savederrors;
2785                 unsigned long savedflags;
2786
2787                 /*
2788                 **  workaround for compiler warning on Irix:
2789                 **  do not initialize variable in the definition, but
2790                 **  later on:
2791                 **  warning(1548): transfer of control bypasses
2792                 **  initialization of:
2793                 **  variable "savederrors" (declared at line 2570)
2794                 **  variable "savedflags" (declared at line 2571)
2795                 **  goto giveup;
2796                 */
2797
2798                 savederrors = Errors;
2799                 savedflags = MainEnvelope.e_flags & EF_FATALERRS;
2800                 MainEnvelope.e_flags |= EF_GLOBALERRS;
2801                 MainEnvelope.e_flags &= ~EF_FATALERRS;
2802                 Errors = 0;
2803                 buffer_errors();
2804                 collect(InChannel, false, NULL, &MainEnvelope, true);
2805
2806                 /* header checks failed */
2807                 if (Errors > 0)
2808                 {
2809   giveup:
2810                         if (!GrabTo)
2811                         {
2812                                 /* Log who the mail would have gone to */
2813                                 logundelrcpts(&MainEnvelope,
2814                                               MainEnvelope.e_message,
2815                                               8, false);
2816                         }
2817                         flush_errors(true);
2818                         finis(true, true, ExitStat);
2819                         /* NOTREACHED */
2820                         return -1;
2821                 }
2822
2823                 /* bail out if message too large */
2824                 if (bitset(EF_CLRQUEUE, MainEnvelope.e_flags))
2825                 {
2826                         finis(true, true, ExitStat != EX_OK ? ExitStat
2827                                                             : EX_DATAERR);
2828                         /* NOTREACHED */
2829                         return -1;
2830                 }
2831
2832                 /* set message size */
2833                 (void) sm_snprintf(buf, sizeof(buf), "%ld",
2834                                    PRT_NONNEGL(MainEnvelope.e_msgsize));
2835                 macdefine(&MainEnvelope.e_macro, A_TEMP,
2836                           macid("{msg_size}"), buf);
2837
2838                 Errors = savederrors;
2839                 MainEnvelope.e_flags |= savedflags;
2840         }
2841         errno = 0;
2842
2843         if (tTd(1, 1))
2844                 sm_dprintf("From person = \"%s\"\n",
2845                            MainEnvelope.e_from.q_paddr);
2846
2847         /* Check if quarantining stats should be updated */
2848         if (MainEnvelope.e_quarmsg != NULL)
2849                 markstats(&MainEnvelope, NULL, STATS_QUARANTINE);
2850
2851         /*
2852         **  Actually send everything.
2853         **      If verifying, just ack.
2854         */
2855
2856         if (Errors == 0)
2857         {
2858                 if (!split_by_recipient(&MainEnvelope) &&
2859                     bitset(EF_FATALERRS, MainEnvelope.e_flags))
2860                         goto giveup;
2861         }
2862
2863         /* make sure we deliver at least the first envelope */
2864         i = FastSplit > 0 ? 0 : -1;
2865         for (e = &MainEnvelope; e != NULL; e = e->e_sibling, i++)
2866         {
2867                 ENVELOPE *next;
2868
2869                 e->e_from.q_state = QS_SENDER;
2870                 if (tTd(1, 5))
2871                 {
2872                         sm_dprintf("main[%d]: QS_SENDER ", i);
2873                         printaddr(sm_debug_file(), &e->e_from, false);
2874                 }
2875                 e->e_to = NULL;
2876                 sm_getla();
2877                 GrabTo = false;
2878 #if NAMED_BIND
2879                 _res.retry = TimeOuts.res_retry[RES_TO_FIRST];
2880                 _res.retrans = TimeOuts.res_retrans[RES_TO_FIRST];
2881 #endif /* NAMED_BIND */
2882                 next = e->e_sibling;
2883                 e->e_sibling = NULL;
2884
2885                 /* after FastSplit envelopes: queue up */
2886                 sendall(e, i >= FastSplit ? SM_QUEUE : SM_DEFAULT);
2887                 e->e_sibling = next;
2888         }
2889
2890         /*
2891         **  All done.
2892         **      Don't send return error message if in VERIFY mode.
2893         */
2894
2895         finis(true, true, ExitStat);
2896         /* NOTREACHED */
2897         return ExitStat;
2898 }
2899 /*
2900 **  STOP_SENDMAIL -- Stop the running program
2901 **
2902 **      Parameters:
2903 **              none.
2904 **
2905 **      Returns:
2906 **              none.
2907 **
2908 **      Side Effects:
2909 **              exits.
2910 */
2911
2912 void
2913 stop_sendmail()
2914 {
2915         /* reset uid for process accounting */
2916         endpwent();
2917         (void) setuid(RealUid);
2918         exit(EX_OK);
2919 }
2920 /*
2921 **  FINIS -- Clean up and exit.
2922 **
2923 **      Parameters:
2924 **              drop -- whether or not to drop CurEnv envelope
2925 **              cleanup -- call exit() or _exit()?
2926 **              exitstat -- exit status to use for exit() call
2927 **
2928 **      Returns:
2929 **              never
2930 **
2931 **      Side Effects:
2932 **              exits sendmail
2933 */
2934
2935 void
2936 finis(drop, cleanup, exitstat)
2937         bool drop;
2938         bool cleanup;
2939         volatile int exitstat;
2940 {
2941         char pidpath[MAXPATHLEN];
2942         pid_t pid;
2943
2944         /* Still want to process new timeouts added below */
2945         sm_clear_events();
2946         (void) sm_releasesignal(SIGALRM);
2947
2948         if (tTd(2, 1))
2949         {
2950                 sm_dprintf("\n====finis: stat %d e_id=%s e_flags=",
2951                            exitstat,
2952                            CurEnv->e_id == NULL ? "NOQUEUE" : CurEnv->e_id);
2953                 printenvflags(CurEnv);
2954         }
2955         if (tTd(2, 9))
2956                 printopenfds(false);
2957
2958         SM_TRY
2959                 /*
2960                 **  Clean up.  This might raise E:mta.quickabort
2961                 */
2962
2963                 /* clean up temp files */
2964                 CurEnv->e_to = NULL;
2965                 if (drop)
2966                 {
2967                         if (CurEnv->e_id != NULL)
2968                         {
2969                                 int r;
2970
2971                                 r = dropenvelope(CurEnv, true, false);
2972                                 if (exitstat == EX_OK)
2973                                         exitstat = r;
2974                                 sm_rpool_free(CurEnv->e_rpool);
2975                                 CurEnv->e_rpool = NULL;
2976
2977                                 /* these may have pointed to the rpool */
2978                                 CurEnv->e_to = NULL;
2979                                 CurEnv->e_message = NULL;
2980                                 CurEnv->e_statmsg = NULL;
2981                                 CurEnv->e_quarmsg = NULL;
2982                                 CurEnv->e_bodytype = NULL;
2983                                 CurEnv->e_id = NULL;
2984                                 CurEnv->e_envid = NULL;
2985                                 CurEnv->e_auth_param = NULL;
2986                         }
2987                         else
2988                                 poststats(StatFile);
2989                 }
2990
2991                 /* flush any cached connections */
2992                 mci_flush(true, NULL);
2993
2994                 /* close maps belonging to this pid */
2995                 closemaps(false);
2996
2997 #if USERDB
2998                 /* close UserDatabase */
2999                 _udbx_close();
3000 #endif /* USERDB */
3001
3002 #if SASL
3003                 stop_sasl_client();
3004 #endif /* SASL */
3005
3006 #if XLA
3007                 /* clean up extended load average stuff */
3008                 xla_all_end();
3009 #endif /* XLA */
3010
3011         SM_FINALLY
3012                 /*
3013                 **  And exit.
3014                 */
3015
3016                 if (LogLevel > 78)
3017                         sm_syslog(LOG_DEBUG, CurEnv->e_id, "finis, pid=%d",
3018                                   (int) CurrentPid);
3019                 if (exitstat == EX_TEMPFAIL ||
3020                     CurEnv->e_errormode == EM_BERKNET)
3021                         exitstat = EX_OK;
3022
3023                 /* XXX clean up queues and related data structures */
3024                 cleanup_queues();
3025                 pid = getpid();
3026 #if SM_CONF_SHM
3027                 cleanup_shm(DaemonPid == pid);
3028 #endif /* SM_CONF_SHM */
3029
3030                 /* close locked pid file */
3031                 close_sendmail_pid();
3032
3033                 if (DaemonPid == pid || PidFilePid == pid)
3034                 {
3035                         /* blow away the pid file */
3036                         expand(PidFile, pidpath, sizeof(pidpath), CurEnv);
3037                         (void) unlink(pidpath);
3038                 }
3039
3040                 /* reset uid for process accounting */
3041                 endpwent();
3042                 sm_mbdb_terminate();
3043 #if _FFR_MEMSTAT
3044                 (void) sm_memstat_close();
3045 #endif /* _FFR_MEMSTAT */
3046                 (void) setuid(RealUid);
3047 #if SM_HEAP_CHECK
3048                 /* dump the heap, if we are checking for memory leaks */
3049                 if (sm_debug_active(&SmHeapCheck, 2))
3050                         sm_heap_report(smioout,
3051                                        sm_debug_level(&SmHeapCheck) - 1);
3052 #endif /* SM_HEAP_CHECK */
3053                 if (sm_debug_active(&SmXtrapReport, 1))
3054                         sm_dprintf("xtrap count = %d\n", SmXtrapCount);
3055                 if (cleanup)
3056                         exit(exitstat);
3057                 else
3058                         _exit(exitstat);
3059         SM_END_TRY
3060 }
3061 /*
3062 **  INTINDEBUG -- signal handler for SIGINT in -bt mode
3063 **
3064 **      Parameters:
3065 **              sig -- incoming signal.
3066 **
3067 **      Returns:
3068 **              none.
3069 **
3070 **      Side Effects:
3071 **              longjmps back to test mode loop.
3072 **
3073 **      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
3074 **              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
3075 **              DOING.
3076 */
3077
3078 /* Type of an exception generated on SIGINT during address test mode.  */
3079 static const SM_EXC_TYPE_T EtypeInterrupt =
3080 {
3081         SmExcTypeMagic,
3082         "S:mta.interrupt",
3083         "",
3084         sm_etype_printf,
3085         "interrupt",
3086 };
3087
3088 /* ARGSUSED */
3089 static SIGFUNC_DECL
3090 intindebug(sig)
3091         int sig;
3092 {
3093         int save_errno = errno;
3094
3095         FIX_SYSV_SIGNAL(sig, intindebug);
3096         errno = save_errno;
3097         CHECK_CRITICAL(sig);
3098         errno = save_errno;
3099         sm_exc_raisenew_x(&EtypeInterrupt);
3100         errno = save_errno;
3101         return SIGFUNC_RETURN;
3102 }
3103 /*
3104 **  SIGTERM -- SIGTERM handler for the daemon
3105 **
3106 **      Parameters:
3107 **              sig -- signal number.
3108 **
3109 **      Returns:
3110 **              none.
3111 **
3112 **      Side Effects:
3113 **              Sets ShutdownRequest which will hopefully trigger
3114 **              the daemon to exit.
3115 **
3116 **      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
3117 **              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
3118 **              DOING.
3119 */
3120
3121 /* ARGSUSED */
3122 static SIGFUNC_DECL
3123 sigterm(sig)
3124         int sig;
3125 {
3126         int save_errno = errno;
3127
3128         FIX_SYSV_SIGNAL(sig, sigterm);
3129         ShutdownRequest = "signal";
3130         errno = save_errno;
3131         return SIGFUNC_RETURN;
3132 }
3133 /*
3134 **  SIGHUP -- handle a SIGHUP signal
3135 **
3136 **      Parameters:
3137 **              sig -- incoming signal.
3138 **
3139 **      Returns:
3140 **              none.
3141 **
3142 **      Side Effects:
3143 **              Sets RestartRequest which should cause the daemon
3144 **              to restart.
3145 **
3146 **      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
3147 **              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
3148 **              DOING.
3149 */
3150
3151 /* ARGSUSED */
3152 static SIGFUNC_DECL
3153 sighup(sig)
3154         int sig;
3155 {
3156         int save_errno = errno;
3157
3158         FIX_SYSV_SIGNAL(sig, sighup);
3159         RestartRequest = "signal";
3160         errno = save_errno;
3161         return SIGFUNC_RETURN;
3162 }
3163 /*
3164 **  SIGPIPE -- signal handler for SIGPIPE
3165 **
3166 **      Parameters:
3167 **              sig -- incoming signal.
3168 **
3169 **      Returns:
3170 **              none.
3171 **
3172 **      Side Effects:
3173 **              Sets StopRequest which should cause the mailq/hoststatus
3174 **              display to stop.
3175 **
3176 **      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
3177 **              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
3178 **              DOING.
3179 */
3180
3181 /* ARGSUSED */
3182 static SIGFUNC_DECL
3183 sigpipe(sig)
3184         int sig;
3185 {
3186         int save_errno = errno;
3187
3188         FIX_SYSV_SIGNAL(sig, sigpipe);
3189         StopRequest = true;
3190         errno = save_errno;
3191         return SIGFUNC_RETURN;
3192 }
3193 /*
3194 **  INTSIG -- clean up on interrupt
3195 **
3196 **      This just arranges to exit.  It pessimizes in that it
3197 **      may resend a message.
3198 **
3199 **      Parameters:
3200 **              sig -- incoming signal.
3201 **
3202 **      Returns:
3203 **              none.
3204 **
3205 **      Side Effects:
3206 **              Unlocks the current job.
3207 **
3208 **      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
3209 **              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
3210 **              DOING.
3211 */
3212
3213 /* ARGSUSED */
3214 SIGFUNC_DECL
3215 intsig(sig)
3216         int sig;
3217 {
3218         bool drop = false;
3219         int save_errno = errno;
3220
3221         FIX_SYSV_SIGNAL(sig, intsig);
3222         errno = save_errno;
3223         CHECK_CRITICAL(sig);
3224         sm_allsignals(true);
3225         IntSig = true;
3226
3227         FileName = NULL;
3228
3229         /* Clean-up on aborted stdin message submission */
3230         if  (OpMode == MD_SMTP ||
3231              OpMode == MD_DELIVER ||
3232              OpMode == MD_ARPAFTP)
3233         {
3234                 if (CurEnv->e_id != NULL)
3235                 {
3236                         char *fn;
3237
3238                         fn = queuename(CurEnv, DATAFL_LETTER);
3239                         if (fn != NULL)
3240                                 (void) unlink(fn);
3241                         fn = queuename(CurEnv, ANYQFL_LETTER);
3242                         if (fn != NULL)
3243                                 (void) unlink(fn);
3244                 }
3245                 _exit(EX_OK);
3246                 /* NOTREACHED */
3247         }
3248
3249         if (sig != 0 && LogLevel > 79)
3250                 sm_syslog(LOG_DEBUG, CurEnv->e_id, "interrupt");
3251         if (OpMode != MD_TEST)
3252                 unlockqueue(CurEnv);
3253
3254         finis(drop, false, EX_OK);
3255         /* NOTREACHED */
3256 }
3257 /*
3258 **  DISCONNECT -- remove our connection with any foreground process
3259 **
3260 **      Parameters:
3261 **              droplev -- how "deeply" we should drop the line.
3262 **                      0 -- ignore signals, mail back errors, make sure
3263 **                           output goes to stdout.
3264 **                      1 -- also, make stdout go to /dev/null.
3265 **                      2 -- also, disconnect from controlling terminal
3266 **                           (only for daemon mode).
3267 **              e -- the current envelope.
3268 **
3269 **      Returns:
3270 **              none
3271 **
3272 **      Side Effects:
3273 **              Trys to insure that we are immune to vagaries of
3274 **              the controlling tty.
3275 */
3276
3277 void
3278 disconnect(droplev, e)
3279         int droplev;
3280         register ENVELOPE *e;
3281 {
3282         int fd;
3283
3284         if (tTd(52, 1))
3285                 sm_dprintf("disconnect: In %d Out %d, e=%p\n",
3286                            sm_io_getinfo(InChannel, SM_IO_WHAT_FD, NULL),
3287                            sm_io_getinfo(OutChannel, SM_IO_WHAT_FD, NULL), e);
3288         if (tTd(52, 100))
3289         {
3290                 sm_dprintf("don't\n");
3291                 return;
3292         }
3293         if (LogLevel > 93)
3294                 sm_syslog(LOG_DEBUG, e->e_id,
3295                           "disconnect level %d",
3296                           droplev);
3297
3298         /* be sure we don't get nasty signals */
3299         (void) sm_signal(SIGINT, SIG_IGN);
3300         (void) sm_signal(SIGQUIT, SIG_IGN);
3301
3302         /* we can't communicate with our caller, so.... */
3303         HoldErrs = true;
3304         CurEnv->e_errormode = EM_MAIL;
3305         Verbose = 0;
3306         DisConnected = true;
3307
3308         /* all input from /dev/null */
3309         if (InChannel != smioin)
3310         {
3311                 (void) sm_io_close(InChannel, SM_TIME_DEFAULT);
3312                 InChannel = smioin;
3313         }
3314         if (sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL,
3315                          SM_IO_RDONLY, NULL, smioin) == NULL)
3316                 sm_syslog(LOG_ERR, e->e_id,
3317                           "disconnect: sm_io_reopen(\"%s\") failed: %s",
3318                           SM_PATH_DEVNULL, sm_errstring(errno));
3319
3320         /*
3321         **  output to the transcript
3322         **      We also compare the fd numbers here since OutChannel
3323         **      might be a layer on top of smioout due to encryption
3324         **      (see sfsasl.c).
3325         */
3326
3327         if (OutChannel != smioout &&
3328             sm_io_getinfo(OutChannel, SM_IO_WHAT_FD, NULL) !=
3329             sm_io_getinfo(smioout, SM_IO_WHAT_FD, NULL))
3330         {
3331                 (void) sm_io_close(OutChannel, SM_TIME_DEFAULT);
3332                 OutChannel = smioout;
3333
3334 #if 0
3335                 /*
3336                 **  Has smioout been closed? Reopen it.
3337                 **      This shouldn't happen anymore, the code is here
3338                 **      just as a reminder.
3339                 */
3340
3341                 if (smioout->sm_magic == NULL &&
3342                     sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL,
3343                                  SM_IO_WRONLY, NULL, smioout) == NULL)
3344                         sm_syslog(LOG_ERR, e->e_id,
3345                                   "disconnect: sm_io_reopen(\"%s\") failed: %s",
3346                                   SM_PATH_DEVNULL, sm_errstring(errno));
3347 #endif /* 0 */
3348         }
3349         if (droplev > 0)
3350         {
3351                 fd = open(SM_PATH_DEVNULL, O_WRONLY, 0666);
3352                 if (fd == -1)
3353                 {
3354                         sm_syslog(LOG_ERR, e->e_id,
3355                                   "disconnect: open(\"%s\") failed: %s",
3356                                   SM_PATH_DEVNULL, sm_errstring(errno));
3357                 }
3358                 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
3359                 if (fd >= 0)
3360                 {
3361                         (void) dup2(fd, STDOUT_FILENO);
3362                         (void) dup2(fd, STDERR_FILENO);
3363                         (void) close(fd);
3364                 }
3365         }
3366
3367         /* drop our controlling TTY completely if possible */
3368         if (droplev > 1)
3369         {
3370                 (void) setsid();
3371                 errno = 0;
3372         }
3373
3374 #if XDEBUG
3375         checkfd012("disconnect");
3376 #endif /* XDEBUG */
3377
3378         if (LogLevel > 71)
3379                 sm_syslog(LOG_DEBUG, e->e_id, "in background, pid=%d",
3380                           (int) CurrentPid);
3381
3382         errno = 0;
3383 }
3384
3385 static void
3386 obsolete(argv)
3387         char *argv[];
3388 {
3389         register char *ap;
3390         register char *op;
3391
3392         while ((ap = *++argv) != NULL)
3393         {
3394                 /* Return if "--" or not an option of any form. */
3395                 if (ap[0] != '-' || ap[1] == '-')
3396                         return;
3397
3398                 /* Don't allow users to use "-Q." or "-Q ." */
3399                 if ((ap[1] == 'Q' && ap[2] == '.') ||
3400                     (ap[1] == 'Q' && argv[1] != NULL &&
3401                      argv[1][0] == '.' && argv[1][1] == '\0'))
3402                 {
3403                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
3404                                              "Can not use -Q.\n");
3405                         exit(EX_USAGE);
3406                 }
3407
3408                 /* skip over options that do have a value */
3409                 op = strchr(OPTIONS, ap[1]);
3410                 if (op != NULL && *++op == ':' && ap[2] == '\0' &&
3411                     ap[1] != 'd' &&
3412 #if defined(sony_news)
3413                     ap[1] != 'E' && ap[1] != 'J' &&
3414 #endif /* defined(sony_news) */
3415                     argv[1] != NULL && argv[1][0] != '-')
3416                 {
3417                         argv++;
3418                         continue;
3419                 }
3420
3421                 /* If -C doesn't have an argument, use sendmail.cf. */
3422 #define __DEFPATH       "sendmail.cf"
3423                 if (ap[1] == 'C' && ap[2] == '\0')
3424                 {
3425                         *argv = xalloc(sizeof(__DEFPATH) + 2);
3426                         (void) sm_strlcpyn(argv[0], sizeof(__DEFPATH) + 2, 2,
3427                                            "-C", __DEFPATH);
3428                 }
3429
3430                 /* If -q doesn't have an argument, run it once. */
3431                 if (ap[1] == 'q' && ap[2] == '\0')
3432                         *argv = "-q0";
3433
3434                 /* If -Q doesn't have an argument, disable quarantining */
3435                 if (ap[1] == 'Q' && ap[2] == '\0')
3436                         *argv = "-Q.";
3437
3438                 /* if -d doesn't have an argument, use 0-99.1 */
3439                 if (ap[1] == 'd' && ap[2] == '\0')
3440                         *argv = "-d0-99.1";
3441
3442 #if defined(sony_news)
3443                 /* if -E doesn't have an argument, use -EC */
3444                 if (ap[1] == 'E' && ap[2] == '\0')
3445                         *argv = "-EC";
3446
3447                 /* if -J doesn't have an argument, use -JJ */
3448                 if (ap[1] == 'J' && ap[2] == '\0')
3449                         *argv = "-JJ";
3450 #endif /* defined(sony_news) */
3451         }
3452 }
3453 /*
3454 **  AUTH_WARNING -- specify authorization warning
3455 **
3456 **      Parameters:
3457 **              e -- the current envelope.
3458 **              msg -- the text of the message.
3459 **              args -- arguments to the message.
3460 **
3461 **      Returns:
3462 **              none.
3463 */
3464
3465 void
3466 #ifdef __STDC__
3467 auth_warning(register ENVELOPE *e, const char *msg, ...)
3468 #else /* __STDC__ */
3469 auth_warning(e, msg, va_alist)
3470         register ENVELOPE *e;
3471         const char *msg;
3472         va_dcl
3473 #endif /* __STDC__ */
3474 {
3475         char buf[MAXLINE];
3476         SM_VA_LOCAL_DECL
3477
3478         if (bitset(PRIV_AUTHWARNINGS, PrivacyFlags))
3479         {
3480                 register char *p;
3481                 static char hostbuf[48];
3482
3483                 if (hostbuf[0] == '\0')
3484                 {
3485                         struct hostent *hp;
3486
3487                         hp = myhostname(hostbuf, sizeof(hostbuf));
3488 #if NETINET6
3489                         if (hp != NULL)
3490                         {
3491                                 freehostent(hp);
3492                                 hp = NULL;
3493                         }
3494 #endif /* NETINET6 */
3495                 }
3496
3497                 (void) sm_strlcpyn(buf, sizeof(buf), 2, hostbuf, ": ");
3498                 p = &buf[strlen(buf)];
3499                 SM_VA_START(ap, msg);
3500                 (void) sm_vsnprintf(p, SPACELEFT(buf, p), msg, ap);
3501                 SM_VA_END(ap);
3502                 addheader("X-Authentication-Warning", buf, 0, e, true);
3503                 if (LogLevel > 3)
3504                         sm_syslog(LOG_INFO, e->e_id,
3505                                   "Authentication-Warning: %.400s",
3506                                   buf);
3507         }
3508 }
3509 /*
3510 **  GETEXTENV -- get from external environment
3511 **
3512 **      Parameters:
3513 **              envar -- the name of the variable to retrieve
3514 **
3515 **      Returns:
3516 **              The value, if any.
3517 */
3518
3519 static char *
3520 getextenv(envar)
3521         const char *envar;
3522 {
3523         char **envp;
3524         int l;
3525
3526         l = strlen(envar);
3527         for (envp = ExternalEnviron; envp != NULL && *envp != NULL; envp++)
3528         {
3529                 if (strncmp(*envp, envar, l) == 0 && (*envp)[l] == '=')
3530                         return &(*envp)[l + 1];
3531         }
3532         return NULL;
3533 }
3534 /*
3535 **  SM_SETUSERENV -- set an environment variable in the propagated environment
3536 **
3537 **      Parameters:
3538 **              envar -- the name of the environment variable.
3539 **              value -- the value to which it should be set.  If
3540 **                      null, this is extracted from the incoming
3541 **                      environment.  If that is not set, the call
3542 **                      to sm_setuserenv is ignored.
3543 **
3544 **      Returns:
3545 **              none.
3546 */
3547
3548 void
3549 sm_setuserenv(envar, value)
3550         const char *envar;
3551         const char *value;
3552 {
3553         int i, l;
3554         char **evp = UserEnviron;
3555         char *p;
3556
3557         if (value == NULL)
3558         {
3559                 value = getextenv(envar);
3560                 if (value == NULL)
3561                         return;
3562         }
3563
3564         /* XXX enforce reasonable size? */
3565         i = strlen(envar) + 1;
3566         l = strlen(value) + i + 1;
3567         p = (char *) xalloc(l);
3568         (void) sm_strlcpyn(p, l, 3, envar, "=", value);
3569
3570         while (*evp != NULL && strncmp(*evp, p, i) != 0)
3571                 evp++;
3572         if (*evp != NULL)
3573         {
3574                 *evp++ = p;
3575         }
3576         else if (evp < &UserEnviron[MAXUSERENVIRON])
3577         {
3578                 *evp++ = p;
3579                 *evp = NULL;
3580         }
3581
3582         /* make sure it is in our environment as well */
3583         if (putenv(p) < 0)
3584                 syserr("sm_setuserenv: putenv(%s) failed", p);
3585 }
3586 /*
3587 **  DUMPSTATE -- dump state
3588 **
3589 **      For debugging.
3590 */
3591
3592 void
3593 dumpstate(when)
3594         char *when;
3595 {
3596         register char *j = macvalue('j', CurEnv);
3597         int rs;
3598         extern int NextMacroId;
3599
3600         sm_syslog(LOG_DEBUG, CurEnv->e_id,
3601                   "--- dumping state on %s: $j = %s ---",
3602                   when,
3603                   j == NULL ? "<NULL>" : j);
3604         if (j != NULL)
3605         {
3606                 if (!wordinclass(j, 'w'))
3607                         sm_syslog(LOG_DEBUG, CurEnv->e_id,
3608                                   "*** $j not in $=w ***");
3609         }
3610         sm_syslog(LOG_DEBUG, CurEnv->e_id, "CurChildren = %d", CurChildren);
3611         sm_syslog(LOG_DEBUG, CurEnv->e_id, "NextMacroId = %d (Max %d)",
3612                   NextMacroId, MAXMACROID);
3613         sm_syslog(LOG_DEBUG, CurEnv->e_id, "--- open file descriptors: ---");
3614         printopenfds(true);
3615         sm_syslog(LOG_DEBUG, CurEnv->e_id, "--- connection cache: ---");
3616         mci_dump_all(smioout, true);
3617         rs = strtorwset("debug_dumpstate", NULL, ST_FIND);
3618         if (rs > 0)
3619         {
3620                 int status;
3621                 register char **pvp;
3622                 char *pv[MAXATOM + 1];
3623
3624                 pv[0] = NULL;
3625                 status = REWRITE(pv, rs, CurEnv);
3626                 sm_syslog(LOG_DEBUG, CurEnv->e_id,
3627                           "--- ruleset debug_dumpstate returns stat %d, pv: ---",
3628                           status);
3629                 for (pvp = pv; *pvp != NULL; pvp++)
3630                         sm_syslog(LOG_DEBUG, CurEnv->e_id, "%s", *pvp);
3631         }
3632         sm_syslog(LOG_DEBUG, CurEnv->e_id, "--- end of state dump ---");
3633 }
3634
3635 #ifdef SIGUSR1
3636 /*
3637 **  SIGUSR1 -- Signal a request to dump state.
3638 **
3639 **      Parameters:
3640 **              sig -- calling signal.
3641 **
3642 **      Returns:
3643 **              none.
3644 **
3645 **      NOTE:   THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
3646 **              ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
3647 **              DOING.
3648 **
3649 **              XXX: More work is needed for this signal handler.
3650 */
3651
3652 /* ARGSUSED */
3653 static SIGFUNC_DECL
3654 sigusr1(sig)
3655         int sig;
3656 {
3657         int save_errno = errno;
3658
3659         FIX_SYSV_SIGNAL(sig, sigusr1);
3660         errno = save_errno;
3661         CHECK_CRITICAL(sig);
3662         dumpstate("user signal");
3663 # if SM_HEAP_CHECK
3664         dumpstab();
3665 # endif /* SM_HEAP_CHECK */
3666         errno = save_errno;
3667         return SIGFUNC_RETURN;
3668 }
3669 #endif /* SIGUSR1 */
3670
3671 /*
3672 **  DROP_PRIVILEGES -- reduce privileges to those of the RunAsUser option
3673 **
3674 **      Parameters:
3675 **              to_real_uid -- if set, drop to the real uid instead
3676 **                      of the RunAsUser.
3677 **
3678 **      Returns:
3679 **              EX_OSERR if the setuid failed.
3680 **              EX_OK otherwise.
3681 */
3682
3683 int
3684 drop_privileges(to_real_uid)
3685         bool to_real_uid;
3686 {
3687         int rval = EX_OK;
3688         GIDSET_T emptygidset[1];
3689
3690         if (tTd(47, 1))
3691                 sm_dprintf("drop_privileges(%d): Real[UG]id=%d:%d, get[ug]id=%d:%d, gete[ug]id=%d:%d, RunAs[UG]id=%d:%d\n",
3692                            (int) to_real_uid,
3693                            (int) RealUid, (int) RealGid,
3694                            (int) getuid(), (int) getgid(),
3695                            (int) geteuid(), (int) getegid(),
3696                            (int) RunAsUid, (int) RunAsGid);
3697
3698         if (to_real_uid)
3699         {
3700                 RunAsUserName = RealUserName;
3701                 RunAsUid = RealUid;
3702                 RunAsGid = RealGid;
3703                 EffGid = RunAsGid;
3704         }
3705
3706         /* make sure no one can grab open descriptors for secret files */
3707         endpwent();
3708         sm_mbdb_terminate();
3709
3710         /* reset group permissions; these can be set later */
3711         emptygidset[0] = (to_real_uid || RunAsGid != 0) ? RunAsGid : getegid();
3712
3713         /*
3714         **  Notice:  on some OS (Linux...) the setgroups() call causes
3715         **      a logfile entry if sendmail is not run by root.
3716         **      However, it is unclear (no POSIX standard) whether
3717         **      setgroups() can only succeed if executed by root.
3718         **      So for now we keep it as it is; if you want to change it, use
3719         **  if (geteuid() == 0 && setgroups(1, emptygidset) == -1)
3720         */
3721
3722         if (setgroups(1, emptygidset) == -1 && geteuid() == 0)
3723         {
3724                 syserr("drop_privileges: setgroups(1, %d) failed",
3725                        (int) emptygidset[0]);
3726                 rval = EX_OSERR;
3727         }
3728
3729         /* reset primary group id */
3730         if (to_real_uid)
3731         {
3732                 /*
3733                 **  Drop gid to real gid.
3734                 **  On some OS we must reset the effective[/real[/saved]] gid,
3735                 **  and then use setgid() to finally drop all group privileges.
3736                 **  Later on we check whether we can get back the
3737                 **  effective gid.
3738                 */
3739
3740 #if HASSETEGID
3741                 if (setegid(RunAsGid) < 0)
3742                 {
3743                         syserr("drop_privileges: setegid(%d) failed",
3744                                (int) RunAsGid);
3745                         rval = EX_OSERR;
3746                 }
3747 #else /* HASSETEGID */
3748 # if HASSETREGID
3749                 if (setregid(RunAsGid, RunAsGid) < 0)
3750                 {
3751                         syserr("drop_privileges: setregid(%d, %d) failed",
3752                                (int) RunAsGid, (int) RunAsGid);
3753                         rval = EX_OSERR;
3754                 }
3755 # else /* HASSETREGID */
3756 #  if HASSETRESGID
3757                 if (setresgid(RunAsGid, RunAsGid, RunAsGid) < 0)
3758                 {
3759                         syserr("drop_privileges: setresgid(%d, %d, %d) failed",
3760                                (int) RunAsGid, (int) RunAsGid, (int) RunAsGid);
3761                         rval = EX_OSERR;
3762                 }
3763 #  endif /* HASSETRESGID */
3764 # endif /* HASSETREGID */
3765 #endif /* HASSETEGID */
3766         }
3767         if (rval == EX_OK && (to_real_uid || RunAsGid != 0))
3768         {
3769                 if (setgid(RunAsGid) < 0 && (!UseMSP || getegid() != RunAsGid))
3770                 {
3771                         syserr("drop_privileges: setgid(%d) failed",
3772                                (int) RunAsGid);
3773                         rval = EX_OSERR;
3774                 }
3775                 errno = 0;
3776                 if (rval == EX_OK && getegid() != RunAsGid)
3777                 {
3778                         syserr("drop_privileges: Unable to set effective gid=%d to RunAsGid=%d",
3779                                (int) getegid(), (int) RunAsGid);
3780                         rval = EX_OSERR;
3781                 }
3782         }
3783
3784         /* fiddle with uid */
3785         if (to_real_uid || RunAsUid != 0)
3786         {
3787                 uid_t euid;
3788
3789                 /*
3790                 **  Try to setuid(RunAsUid).
3791                 **  euid must be RunAsUid,
3792                 **  ruid must be RunAsUid unless (e|r)uid wasn't 0
3793                 **      and we didn't have to drop privileges to the real uid.
3794                 */
3795
3796                 if (setuid(RunAsUid) < 0 ||
3797                     geteuid() != RunAsUid ||
3798                     (getuid() != RunAsUid &&
3799                      (to_real_uid || geteuid() == 0 || getuid() == 0)))
3800                 {
3801 #if HASSETREUID
3802                         /*
3803                         **  if ruid != RunAsUid, euid == RunAsUid, then
3804                         **  try resetting just the real uid, then using
3805                         **  setuid() to drop the saved-uid as well.
3806                         */
3807
3808                         if (geteuid() == RunAsUid)
3809                         {
3810                                 if (setreuid(RunAsUid, -1) < 0)
3811                                 {
3812                                         syserr("drop_privileges: setreuid(%d, -1) failed",
3813                                                (int) RunAsUid);
3814                                         rval = EX_OSERR;
3815                                 }
3816                                 if (setuid(RunAsUid) < 0)
3817                                 {
3818                                         syserr("drop_privileges: second setuid(%d) attempt failed",
3819                                                (int) RunAsUid);
3820                                         rval = EX_OSERR;
3821                                 }
3822                         }
3823                         else
3824 #endif /* HASSETREUID */
3825                         {
3826                                 syserr("drop_privileges: setuid(%d) failed",
3827                                        (int) RunAsUid);
3828                                 rval = EX_OSERR;
3829                         }
3830                 }
3831                 euid = geteuid();
3832                 if (RunAsUid != 0 && setuid(0) == 0)
3833                 {
3834                         /*
3835                         **  Believe it or not, the Linux capability model
3836                         **  allows a non-root process to override setuid()
3837                         **  on a process running as root and prevent that
3838                         **  process from dropping privileges.
3839                         */
3840
3841                         syserr("drop_privileges: setuid(0) succeeded (when it should not)");
3842                         rval = EX_OSERR;
3843                 }
3844                 else if (RunAsUid != euid && setuid(euid) == 0)
3845                 {
3846                         /*
3847                         **  Some operating systems will keep the saved-uid
3848                         **  if a non-root effective-uid calls setuid(real-uid)
3849                         **  making it possible to set it back again later.
3850                         */
3851
3852                         syserr("drop_privileges: Unable to drop non-root set-user-ID privileges");
3853                         rval = EX_OSERR;
3854                 }
3855         }
3856
3857         if ((to_real_uid || RunAsGid != 0) &&
3858             rval == EX_OK && RunAsGid != EffGid &&
3859             getuid() != 0 && geteuid() != 0)
3860         {
3861                 errno = 0;
3862                 if (setgid(EffGid) == 0)
3863                 {
3864                         syserr("drop_privileges: setgid(%d) succeeded (when it should not)",
3865                                (int) EffGid);
3866                         rval = EX_OSERR;
3867                 }
3868         }
3869
3870         if (tTd(47, 5))
3871         {
3872                 sm_dprintf("drop_privileges: e/ruid = %d/%d e/rgid = %d/%d\n",
3873                            (int) geteuid(), (int) getuid(),
3874                            (int) getegid(), (int) getgid());
3875                 sm_dprintf("drop_privileges: RunAsUser = %d:%d\n",
3876                            (int) RunAsUid, (int) RunAsGid);
3877                 if (tTd(47, 10))
3878                         sm_dprintf("drop_privileges: rval = %d\n", rval);
3879         }
3880         return rval;
3881 }
3882 /*
3883 **  FILL_FD -- make sure a file descriptor has been properly allocated
3884 **
3885 **      Used to make sure that stdin/out/err are allocated on startup
3886 **
3887 **      Parameters:
3888 **              fd -- the file descriptor to be filled.
3889 **              where -- a string used for logging.  If NULL, this is
3890 **                      being called on startup, and logging should
3891 **                      not be done.
3892 **
3893 **      Returns:
3894 **              none
3895 **
3896 **      Side Effects:
3897 **              possibly changes MissingFds
3898 */
3899
3900 void
3901 fill_fd(fd, where)
3902         int fd;
3903         char *where;
3904 {
3905         int i;
3906         struct stat stbuf;
3907
3908         if (fstat(fd, &stbuf) >= 0 || errno != EBADF)
3909                 return;
3910
3911         if (where != NULL)
3912                 syserr("fill_fd: %s: fd %d not open", where, fd);
3913         else
3914                 MissingFds |= 1 << fd;
3915         i = open(SM_PATH_DEVNULL, fd == 0 ? O_RDONLY : O_WRONLY, 0666);
3916         if (i < 0)
3917         {
3918                 syserr("!fill_fd: %s: cannot open %s",
3919                        where == NULL ? "startup" : where, SM_PATH_DEVNULL);
3920         }
3921         if (fd != i)
3922         {
3923                 (void) dup2(i, fd);
3924                 (void) close(i);
3925         }
3926 }
3927 /*
3928 **  SM_PRINTOPTIONS -- print options
3929 **
3930 **      Parameters:
3931 **              options -- array of options.
3932 **
3933 **      Returns:
3934 **              none.
3935 */
3936
3937 static void
3938 sm_printoptions(options)
3939         char **options;
3940 {
3941         int ll;
3942         char **av;
3943
3944         av = options;
3945         ll = 7;
3946         while (*av != NULL)
3947         {
3948                 if (ll + strlen(*av) > 63)
3949                 {
3950                         sm_dprintf("\n");
3951                         ll = 0;
3952                 }
3953                 if (ll == 0)
3954                         sm_dprintf("\t\t");
3955                 else
3956                         sm_dprintf(" ");
3957                 sm_dprintf("%s", *av);
3958                 ll += strlen(*av++) + 1;
3959         }
3960         sm_dprintf("\n");
3961 }
3962
3963 /*
3964 **  TO8BIT -- convert \octal sequences in a test mode input line
3965 **
3966 **      Parameters:
3967 **              str -- the input line.
3968 **
3969 **      Returns:
3970 **              none.
3971 **
3972 **      Side Effects:
3973 **              replaces \0octal in str with octal value.
3974 */
3975
3976 static bool to8bit __P((char *));
3977
3978 static bool
3979 to8bit(str)
3980         char *str;
3981 {
3982         int c, len;
3983         char *out, *in;
3984         bool changed;
3985
3986         if (str == NULL)
3987                 return false;
3988         in = out = str;
3989         changed = false;
3990         len = 0;
3991         while ((c = (*str++ & 0377)) != '\0')
3992         {
3993                 int oct, nxtc;
3994
3995                 ++len;
3996                 if (c == '\\' &&
3997                     (nxtc = (*str & 0377)) == '0')
3998                 {
3999                         oct = 0;
4000                         while ((nxtc = (*str & 0377)) != '\0' &&
4001                                 isascii(nxtc) && isdigit(nxtc))
4002                         {
4003                                 oct <<= 3;
4004                                 oct += nxtc - '0';
4005                                 ++str;
4006                                 ++len;
4007                         }
4008                         changed = true;
4009                         c = oct;
4010                 }
4011                 *out++ = c;
4012         }
4013         *out++ = c;
4014         if (changed)
4015         {
4016                 char *q;
4017
4018                 q = quote_internal_chars(in, in, &len);
4019                 if (q != in)
4020                         sm_strlcpy(in, q, len);
4021         }
4022         return changed;
4023 }
4024
4025 /*
4026 **  TESTMODELINE -- process a test mode input line
4027 **
4028 **      Parameters:
4029 **              line -- the input line.
4030 **              e -- the current environment.
4031 **      Syntax:
4032 **              #  a comment
4033 **              .X process X as a configuration line
4034 **              =X dump a configuration item (such as mailers)
4035 **              $X dump a macro or class
4036 **              /X try an activity
4037 **              X  normal process through rule set X
4038 */
4039
4040 static void
4041 testmodeline(line, e)
4042         char *line;
4043         ENVELOPE *e;
4044 {
4045         register char *p;
4046         char *q;
4047         auto char *delimptr;
4048         int mid;
4049         int i, rs;
4050         STAB *map;
4051         char **s;
4052         struct rewrite *rw;
4053         ADDRESS a;
4054         char *lbp;
4055         auto int lbs;
4056         static int tryflags = RF_COPYNONE;
4057         char exbuf[MAXLINE];
4058         char lbuf[MAXLINE];
4059         extern unsigned char TokTypeNoC[];
4060         bool eightbit;
4061
4062         /* skip leading spaces */
4063         while (*line == ' ')
4064                 line++;
4065
4066         lbp = NULL;
4067         eightbit = false;
4068         switch (line[0])
4069         {
4070           case '#':
4071           case '\0':
4072                 return;
4073
4074           case '?':
4075                 help("-bt", e);
4076                 return;
4077
4078           case '.':             /* config-style settings */
4079                 switch (line[1])
4080                 {
4081                   case 'D':
4082                         mid = macid_parse(&line[2], &delimptr);
4083                         if (mid == 0)
4084                                 return;
4085                         lbs = sizeof(lbuf);
4086                         lbp = translate_dollars(delimptr, lbuf, &lbs);
4087                         macdefine(&e->e_macro, A_TEMP, mid, lbp);
4088                         if (lbp != lbuf)
4089                                 SM_FREE(lbp);
4090                         break;
4091
4092                   case 'C':
4093                         if (line[2] == '\0')    /* not to call syserr() */
4094                                 return;
4095
4096                         mid = macid_parse(&line[2], &delimptr);
4097                         if (mid == 0)
4098                                 return;
4099                         lbs = sizeof(lbuf);
4100                         lbp = translate_dollars(delimptr, lbuf, &lbs);
4101                         expand(lbp, exbuf, sizeof(exbuf), e);
4102                         if (lbp != lbuf)
4103                                 SM_FREE(lbp);
4104                         p = exbuf;
4105                         while (*p != '\0')
4106                         {
4107                                 register char *wd;
4108                                 char delim;
4109
4110                                 while (*p != '\0' && isascii(*p) && isspace(*p))
4111                                         p++;
4112                                 wd = p;
4113                                 while (*p != '\0' && !(isascii(*p) && isspace(*p)))
4114                                         p++;
4115                                 delim = *p;
4116                                 *p = '\0';
4117                                 if (wd[0] != '\0')
4118                                         setclass(mid, wd);
4119                                 *p = delim;
4120                         }
4121                         break;
4122
4123                   case '\0':
4124                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4125                                              "Usage: .[DC]macro value(s)\n");
4126                         break;
4127
4128                   default:
4129                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4130                                              "Unknown \".\" command %s\n", line);
4131                         break;
4132                 }
4133                 return;
4134
4135           case '=':             /* config-style settings */
4136                 switch (line[1])
4137                 {
4138                   case 'S':             /* dump rule set */
4139                         rs = strtorwset(&line[2], NULL, ST_FIND);
4140                         if (rs < 0)
4141                         {
4142                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4143                                                      "Undefined ruleset %s\n", &line[2]);
4144                                 return;
4145                         }
4146                         rw = RewriteRules[rs];
4147                         if (rw == NULL)
4148                                 return;
4149                         do
4150                         {
4151                                 (void) sm_io_putc(smioout, SM_TIME_DEFAULT,
4152                                                   'R');
4153                                 s = rw->r_lhs;
4154                                 while (*s != NULL)
4155                                 {
4156                                         xputs(smioout, *s++);
4157                                         (void) sm_io_putc(smioout,
4158                                                           SM_TIME_DEFAULT, ' ');
4159                                 }
4160                                 (void) sm_io_putc(smioout, SM_TIME_DEFAULT,
4161                                                   '\t');
4162                                 (void) sm_io_putc(smioout, SM_TIME_DEFAULT,
4163                                                   '\t');
4164                                 s = rw->r_rhs;
4165                                 while (*s != NULL)
4166                                 {
4167                                         xputs(smioout, *s++);
4168                                         (void) sm_io_putc(smioout,
4169                                                           SM_TIME_DEFAULT, ' ');
4170                                 }
4171                                 (void) sm_io_putc(smioout, SM_TIME_DEFAULT,
4172                                                   '\n');
4173                         } while ((rw = rw->r_next) != NULL);
4174                         break;
4175
4176                   case 'M':
4177                         for (i = 0; i < MAXMAILERS; i++)
4178                         {
4179                                 if (Mailer[i] != NULL)
4180                                         printmailer(smioout, Mailer[i]);
4181                         }
4182                         break;
4183
4184                   case '\0':
4185                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4186                                              "Usage: =Sruleset or =M\n");
4187                         break;
4188
4189                   default:
4190                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4191                                              "Unknown \"=\" command %s\n", line);
4192                         break;
4193                 }
4194                 return;
4195
4196           case '-':             /* set command-line-like opts */
4197                 switch (line[1])
4198                 {
4199                   case 'd':
4200                         tTflag(&line[2]);
4201                         break;
4202
4203                   case '\0':
4204                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4205                                              "Usage: -d{debug arguments}\n");
4206                         break;
4207
4208                   default:
4209                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4210                                              "Unknown \"-\" command %s\n", line);
4211                         break;
4212                 }
4213                 return;
4214
4215           case '$':
4216                 if (line[1] == '=')
4217                 {
4218                         mid = macid(&line[2]);
4219                         if (mid != 0)
4220                                 stabapply(dump_class, mid);
4221                         return;
4222                 }
4223                 mid = macid(&line[1]);
4224                 if (mid == 0)
4225                         return;
4226                 p = macvalue(mid, e);
4227                 if (p == NULL)
4228                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4229                                              "Undefined\n");
4230                 else
4231                 {
4232                         xputs(smioout, p);
4233                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4234                                              "\n");
4235                 }
4236                 return;
4237
4238           case '/':             /* miscellaneous commands */
4239                 p = &line[strlen(line)];
4240                 while (--p >= line && isascii(*p) && isspace(*p))
4241                         *p = '\0';
4242                 p = strpbrk(line, " \t");
4243                 if (p != NULL)
4244                 {
4245                         while (isascii(*p) && isspace(*p))
4246                                 *p++ = '\0';
4247                 }
4248                 else
4249                         p = "";
4250                 if (line[1] == '\0')
4251                 {
4252                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4253                                              "Usage: /[canon|map|mx|parse|try|tryflags]\n");
4254                         return;
4255                 }
4256                 if (sm_strcasecmp(&line[1], "quit") == 0)
4257                 {
4258                         CurEnv->e_id = NULL;
4259                         finis(true, true, ExitStat);
4260                         /* NOTREACHED */
4261                 }
4262                 if (sm_strcasecmp(&line[1], "mx") == 0)
4263                 {
4264 #if NAMED_BIND
4265                         /* look up MX records */
4266                         int nmx;
4267                         auto int rcode;
4268                         char *mxhosts[MAXMXHOSTS + 1];
4269
4270                         if (*p == '\0')
4271                         {
4272                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4273                                                      "Usage: /mx address\n");
4274                                 return;
4275                         }
4276                         nmx = getmxrr(p, mxhosts, NULL, false, &rcode, true,
4277                                       NULL);
4278                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4279                                              "getmxrr(%s) returns %d value(s):\n",
4280                                 p, nmx);
4281                         for (i = 0; i < nmx; i++)
4282                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4283                                                      "\t%s\n", mxhosts[i]);
4284 #else /* NAMED_BIND */
4285                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4286                                              "No MX code compiled in\n");
4287 #endif /* NAMED_BIND */
4288                 }
4289                 else if (sm_strcasecmp(&line[1], "canon") == 0)
4290                 {
4291                         char host[MAXHOSTNAMELEN];
4292
4293                         if (*p == '\0')
4294                         {
4295                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4296                                                      "Usage: /canon address\n");
4297                                 return;
4298                         }
4299                         else if (sm_strlcpy(host, p, sizeof(host)) >= sizeof(host))
4300                         {
4301                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4302                                                      "Name too long\n");
4303                                 return;
4304                         }
4305                         (void) getcanonname(host, sizeof(host), !HasWildcardMX,
4306                                             NULL);
4307                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4308                                              "getcanonname(%s) returns %s\n",
4309                                              p, host);
4310                 }
4311                 else if (sm_strcasecmp(&line[1], "map") == 0)
4312                 {
4313                         auto int rcode = EX_OK;
4314                         char *av[2];
4315
4316                         if (*p == '\0')
4317                         {
4318                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4319                                                      "Usage: /map mapname key\n");
4320                                 return;
4321                         }
4322                         for (q = p; *q != '\0' && !(isascii(*q) && isspace(*q));                             q++)
4323                                 continue;
4324                         if (*q == '\0')
4325                         {
4326                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4327                                                      "No key specified\n");
4328                                 return;
4329                         }
4330                         *q++ = '\0';
4331                         map = stab(p, ST_MAP, ST_FIND);
4332                         if (map == NULL)
4333                         {
4334                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4335                                                      "Map named \"%s\" not found\n", p);
4336                                 return;
4337                         }
4338                         if (!bitset(MF_OPEN, map->s_map.map_mflags) &&
4339                             !openmap(&(map->s_map)))
4340                         {
4341                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4342                                                      "Map named \"%s\" not open\n", p);
4343                                 return;
4344                         }
4345                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4346                                              "map_lookup: %s (%s) ", p, q);
4347                         av[0] = q;
4348                         av[1] = NULL;
4349                         p = (*map->s_map.map_class->map_lookup)
4350                                         (&map->s_map, q, av, &rcode);
4351                         if (p == NULL)
4352                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4353                                                      "no match (%d)\n",
4354                                                      rcode);
4355                         else
4356                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4357                                                      "returns %s (%d)\n", p,
4358                                                      rcode);
4359                 }
4360                 else if (sm_strcasecmp(&line[1], "try") == 0)
4361                 {
4362                         MAILER *m;
4363                         STAB *st;
4364                         auto int rcode = EX_OK;
4365
4366                         q = strpbrk(p, " \t");
4367                         if (q != NULL)
4368                         {
4369                                 while (isascii(*q) && isspace(*q))
4370                                         *q++ = '\0';
4371                         }
4372                         if (q == NULL || *q == '\0')
4373                         {
4374                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4375                                                      "Usage: /try mailer address\n");
4376                                 return;
4377                         }
4378                         st = stab(p, ST_MAILER, ST_FIND);
4379                         if (st == NULL)
4380                         {
4381                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4382                                                      "Unknown mailer %s\n", p);
4383                                 return;
4384                         }
4385                         m = st->s_mailer;
4386                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4387                                              "Trying %s %s address %s for mailer %s\n",
4388                                      bitset(RF_HEADERADDR, tryflags) ? "header"
4389                                                         : "envelope",
4390                                      bitset(RF_SENDERADDR, tryflags) ? "sender"
4391                                                         : "recipient", q, p);
4392                         p = remotename(q, m, tryflags, &rcode, CurEnv);
4393                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4394                                              "Rcode = %d, addr = %s\n",
4395                                              rcode, p == NULL ? "<NULL>" : p);
4396                         e->e_to = NULL;
4397                 }
4398                 else if (sm_strcasecmp(&line[1], "tryflags") == 0)
4399                 {
4400                         if (*p == '\0')
4401                         {
4402                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4403                                                      "Usage: /tryflags [Hh|Ee][Ss|Rr]\n");
4404                                 return;
4405                         }
4406                         for (; *p != '\0'; p++)
4407                         {
4408                                 switch (*p)
4409                                 {
4410                                   case 'H':
4411                                   case 'h':
4412                                         tryflags |= RF_HEADERADDR;
4413                                         break;
4414
4415                                   case 'E':
4416                                   case 'e':
4417                                         tryflags &= ~RF_HEADERADDR;
4418                                         break;
4419
4420                                   case 'S':
4421                                   case 's':
4422                                         tryflags |= RF_SENDERADDR;
4423                                         break;
4424
4425                                   case 'R':
4426                                   case 'r':
4427                                         tryflags &= ~RF_SENDERADDR;
4428                                         break;
4429                                 }
4430                         }
4431                         exbuf[0] = bitset(RF_HEADERADDR, tryflags) ? 'h' : 'e';
4432                         exbuf[1] = ' ';
4433                         exbuf[2] = bitset(RF_SENDERADDR, tryflags) ? 's' : 'r';
4434                         exbuf[3] = '\0';
4435                         macdefine(&e->e_macro, A_TEMP,
4436                                 macid("{addr_type}"), exbuf);
4437                 }
4438                 else if (sm_strcasecmp(&line[1], "parse") == 0)
4439                 {
4440                         if (*p == '\0')
4441                         {
4442                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4443                                                      "Usage: /parse address\n");
4444                                 return;
4445                         }
4446                         q = crackaddr(p, e);
4447                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4448                                              "Cracked address = ");
4449                         xputs(smioout, q);
4450                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4451                                              "\nParsing %s %s address\n",
4452                                              bitset(RF_HEADERADDR, tryflags) ?
4453                                                         "header" : "envelope",
4454                                              bitset(RF_SENDERADDR, tryflags) ?
4455                                                         "sender" : "recipient");
4456                         if (parseaddr(p, &a, tryflags, '\0', NULL, e, true)
4457                             == NULL)
4458                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4459                                                      "Cannot parse\n");
4460                         else if (a.q_host != NULL && a.q_host[0] != '\0')
4461                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4462                                                      "mailer %s, host %s, user %s\n",
4463                                                      a.q_mailer->m_name,
4464                                                      a.q_host,
4465                                                      a.q_user);
4466                         else
4467                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4468                                                      "mailer %s, user %s\n",
4469                                                      a.q_mailer->m_name,
4470                                                      a.q_user);
4471                         e->e_to = NULL;
4472                 }
4473                 else if (sm_strcasecmp(&line[1], "header") == 0)
4474                 {
4475                         unsigned long ul;
4476
4477                         ul = chompheader(p, CHHDR_CHECK|CHHDR_USER, NULL, e);
4478                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4479                                              "ul = %lu\n", ul);
4480                 }
4481                 else
4482                 {
4483                         (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4484                                              "Unknown \"/\" command %s\n",
4485                                              line);
4486                 }
4487                 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
4488                 return;
4489         }
4490
4491         for (p = line; isascii(*p) && isspace(*p); p++)
4492                 continue;
4493         q = p;
4494         while (*p != '\0' && !(isascii(*p) && isspace(*p)))
4495                 p++;
4496         if (*p == '\0')
4497         {
4498                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4499                                      "No address!\n");
4500                 return;
4501         }
4502         *p = '\0';
4503         if (tTd(23, 101))
4504                 eightbit = to8bit(p + 1);
4505         if (invalidaddr(p + 1, NULL, true))
4506                 return;
4507         do
4508         {
4509                 register char **pvp;
4510                 char pvpbuf[PSBUFSIZE];
4511
4512                 pvp = prescan(++p, ',', pvpbuf, sizeof(pvpbuf), &delimptr,
4513                               ConfigLevel >= 9 ? TokTypeNoC : ExtTokenTab, false);
4514                 if (pvp == NULL)
4515                         continue;
4516                 p = q;
4517                 while (*p != '\0')
4518                 {
4519                         int status;
4520
4521                         rs = strtorwset(p, NULL, ST_FIND);
4522                         if (rs < 0)
4523                         {
4524                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4525                                                      "Undefined ruleset %s\n",
4526                                                      p);
4527                                 break;
4528                         }
4529                         status = REWRITE(pvp, rs, e);
4530                         if (status != EX_OK)
4531                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4532                                                      "== Ruleset %s (%d) status %d\n",
4533                                                      p, rs, status);
4534                         else if (eightbit)
4535                         {
4536                                 cataddr(pvp, NULL, exbuf, sizeof(exbuf), '\0',
4537                                         true);
4538                                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4539                                                      "cataddr: %s\n",
4540                                                      str2prt(exbuf));
4541                         }
4542                         while (*p != '\0' && *p++ != ',')
4543                                 continue;
4544                 }
4545         } while (*(p = delimptr) != '\0');
4546         (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
4547 }
4548
4549 static void
4550 dump_class(s, id)
4551         register STAB *s;
4552         int id;
4553 {
4554         if (s->s_symtype != ST_CLASS)
4555                 return;
4556         if (bitnset(bitidx(id), s->s_class))
4557                 (void) sm_io_fprintf(smioout, SM_TIME_DEFAULT,
4558                                      "%s\n", s->s_name);
4559 }
4560
4561 /*
4562 **  An exception type used to create QuickAbort exceptions.
4563 **  This is my first cut at converting QuickAbort from longjmp to exceptions.
4564 **  These exceptions have a single integer argument, which is the argument
4565 **  to longjmp in the original code (either 1 or 2).  I don't know the
4566 **  significance of 1 vs 2: the calls to setjmp don't care.
4567 */
4568
4569 const SM_EXC_TYPE_T EtypeQuickAbort =
4570 {
4571         SmExcTypeMagic,
4572         "E:mta.quickabort",
4573         "i",
4574         sm_etype_printf,
4575         "quick abort %0",
4576 };