contrib/sendmail/src/collect.c

   1 /*
   2  * Copyright (c) 1998-2006, 2008 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 #include <sendmail.h>
  15
  16 SM_RCSID("@(#)$Id: collect.c,v 8.284 2008/08/06 05:26:24 ca Exp $")
  17
  18 static void     eatfrom __P((char *volatile, ENVELOPE *));
  19 static void     collect_doheader __P((ENVELOPE *));
  20 static SM_FILE_T *collect_dfopen __P((ENVELOPE *));
  21 static SM_FILE_T *collect_eoh __P((ENVELOPE *, int, int));
  22
  23 /*
  24 **  COLLECT_EOH -- end-of-header processing in collect()
  25 **
  26 **      Called by collect() when it encounters the blank line
  27 **      separating the header from the message body, or when it
  28 **      encounters EOF in a message that contains only a header.
  29 **
  30 **      Parameters:
  31 **              e -- envelope
  32 **              numhdrs -- number of headers
  33 **              hdrslen -- length of headers
  34 **
  35 **      Results:
  36 **              NULL, or handle to open data file
  37 **
  38 **      Side Effects:
  39 **              end-of-header check ruleset is invoked.
  40 **              envelope state is updated.
  41 **              headers may be added and deleted.
  42 **              selects the queue.
  43 **              opens the data file.
  44 */
  45
  46 static SM_FILE_T *
  47 collect_eoh(e, numhdrs, hdrslen)
  48         ENVELOPE *e;
  49         int numhdrs;
  50         int hdrslen;
  51 {
  52         char hnum[16];
  53         char hsize[16];
  54
  55         /* call the end-of-header check ruleset */
  56         (void) sm_snprintf(hnum, sizeof(hnum), "%d", numhdrs);
  57         (void) sm_snprintf(hsize, sizeof(hsize), "%d", hdrslen);
  58         if (tTd(30, 10))
  59                 sm_dprintf("collect: rscheck(\"check_eoh\", \"%s $| %s\")\n",
  60                            hnum, hsize);
  61         (void) rscheck("check_eoh", hnum, hsize, e, RSF_UNSTRUCTURED|RSF_COUNT,
  62                         3, NULL, e->e_id, NULL);
  63
  64         /*
  65         **  Process the header,
  66         **  select the queue, open the data file.
  67         */
  68
  69         collect_doheader(e);
  70         return collect_dfopen(e);
  71 }
  72
  73 /*
  74 **  COLLECT_DOHEADER -- process header in collect()
  75 **
  76 **      Called by collect() after it has finished parsing the header,
  77 **      but before it selects the queue and creates the data file.
  78 **      The results of processing the header will affect queue selection.
  79 **
  80 **      Parameters:
  81 **              e -- envelope
  82 **
  83 **      Results:
  84 **              none.
  85 **
  86 **      Side Effects:
  87 **              envelope state is updated.
  88 **              headers may be added and deleted.
  89 */
  90
  91 static void
  92 collect_doheader(e)
  93         ENVELOPE *e;
  94 {
  95         /*
  96         **  Find out some information from the headers.
  97         **      Examples are who is the from person & the date.
  98         */
  99
 100         eatheader(e, true, false);
 101
 102         if (GrabTo && e->e_sendqueue == NULL)
 103                 usrerr("No recipient addresses found in header");
 104
 105         /*
 106         **  If we have a Return-Receipt-To:, turn it into a DSN.
 107         */
 108
 109         if (RrtImpliesDsn && hvalue("return-receipt-to", e->e_header) != NULL)
 110         {
 111                 ADDRESS *q;
 112
 113                 for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 114                         if (!bitset(QHASNOTIFY, q->q_flags))
 115                                 q->q_flags |= QHASNOTIFY|QPINGONSUCCESS;
 116         }
 117
 118         /*
 119         **  Add an appropriate recipient line if we have none.
 120         */
 121
 122         if (hvalue("to", e->e_header) != NULL ||
 123             hvalue("cc", e->e_header) != NULL ||
 124             hvalue("apparently-to", e->e_header) != NULL)
 125         {
 126                 /* have a valid recipient header -- delete Bcc: headers */
 127                 e->e_flags |= EF_DELETE_BCC;
 128         }
 129         else if (hvalue("bcc", e->e_header) == NULL)
 130         {
 131                 /* no valid recipient headers */
 132                 register ADDRESS *q;
 133                 char *hdr = NULL;
 134
 135                 /* create a recipient field */
 136                 switch (NoRecipientAction)
 137                 {
 138                   case NRA_ADD_APPARENTLY_TO:
 139                         hdr = "Apparently-To";
 140                         break;
 141
 142                   case NRA_ADD_TO:
 143                         hdr = "To";
 144                         break;
 145
 146                   case NRA_ADD_BCC:
 147                         addheader("Bcc", " ", 0, e, true);
 148                         break;
 149
 150                   case NRA_ADD_TO_UNDISCLOSED:
 151                         addheader("To", "undisclosed-recipients:;", 0, e, true);
 152                         break;
 153                 }
 154
 155                 if (hdr != NULL)
 156                 {
 157                         for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 158                         {
 159                                 if (q->q_alias != NULL)
 160                                         continue;
 161                                 if (tTd(30, 3))
 162                                         sm_dprintf("Adding %s: %s\n",
 163                                                 hdr, q->q_paddr);
 164                                 addheader(hdr, q->q_paddr, 0, e, true);
 165                         }
 166                 }
 167         }
 168 }
 169
 170 /*
 171 **  COLLECT_DFOPEN -- open the message data file
 172 **
 173 **      Called by collect() after it has finished processing the header.
 174 **      Queue selection occurs at this point, possibly based on the
 175 **      envelope's recipient list and on header information.
 176 **
 177 **      Parameters:
 178 **              e -- envelope
 179 **
 180 **      Results:
 181 **              NULL, or a pointer to an open data file,
 182 **              into which the message body will be written by collect().
 183 **
 184 **      Side Effects:
 185 **              Calls syserr, sets EF_FATALERRS and returns NULL
 186 **              if there is insufficient disk space.
 187 **              Aborts process if data file could not be opened.
 188 **              Otherwise, the queue is selected,
 189 **              e->e_{dfino,dfdev,msgsize,flags} are updated,
 190 **              and a pointer to an open data file is returned.
 191 */
 192
 193 static SM_FILE_T *
 194 collect_dfopen(e)
 195         ENVELOPE *e;
 196 {
 197         MODE_T oldumask = 0;
 198         int dfd;
 199         struct stat stbuf;
 200         SM_FILE_T *df;
 201         char *dfname;
 202
 203         if (!setnewqueue(e))
 204                 return NULL;
 205
 206         dfname = queuename(e, DATAFL_LETTER);
 207         if (bitset(S_IWGRP, QueueFileMode))
 208                 oldumask = umask(002);
 209         df = bfopen(dfname, QueueFileMode, DataFileBufferSize,
 210                     SFF_OPENASROOT);
 211         if (bitset(S_IWGRP, QueueFileMode))
 212                 (void) umask(oldumask);
 213         if (df == NULL)
 214         {
 215                 syserr("@Cannot create %s", dfname);
 216                 e->e_flags |= EF_NO_BODY_RETN;
 217                 flush_errors(true);
 218                 finis(false, true, ExitStat);
 219                 /* NOTREACHED */
 220         }
 221         dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL);
 222         if (dfd < 0 || fstat(dfd, &stbuf) < 0)
 223                 e->e_dfino = -1;
 224         else
 225         {
 226                 e->e_dfdev = stbuf.st_dev;
 227                 e->e_dfino = stbuf.st_ino;
 228         }
 229         e->e_flags |= EF_HAS_DF;
 230         return df;
 231 }
 232
 233 /*
 234 **  COLLECT -- read & parse message header & make temp file.
 235 **
 236 **      Creates a temporary file name and copies the standard
 237 **      input to that file.  Leading UNIX-style "From" lines are
 238 **      stripped off (after important information is extracted).
 239 **
 240 **      Parameters:
 241 **              fp -- file to read.
 242 **              smtpmode -- if set, we are running SMTP: give an RFC821
 243 **                      style message to say we are ready to collect
 244 **                      input, and never ignore a single dot to mean
 245 **                      end of message.
 246 **              hdrp -- the location to stash the header.
 247 **              e -- the current envelope.
 248 **              rsetsize -- reset e_msgsize?
 249 **
 250 **      Returns:
 251 **              none.
 252 **
 253 **      Side Effects:
 254 **              If successful,
 255 **              - Data file is created and filled, and e->e_dfp is set.
 256 **              - The from person may be set.
 257 **              If the "enough disk space" check fails,
 258 **              - syserr is called.
 259 **              - e->e_dfp is NULL.
 260 **              - e->e_flags & EF_FATALERRS is set.
 261 **              - collect() returns.
 262 **              If data file cannot be created, the process is terminated.
 263 */
 264
 265 /* values for input state machine */
 266 #define IS_NORM         0       /* middle of line */
 267 #define IS_BOL          1       /* beginning of line */
 268 #define IS_DOT          2       /* read a dot at beginning of line */
 269 #define IS_DOTCR        3       /* read ".\r" at beginning of line */
 270 #define IS_CR           4       /* read a carriage return */
 271
 272 /* values for message state machine */
 273 #define MS_UFROM        0       /* reading Unix from line */
 274 #define MS_HEADER       1       /* reading message header */
 275 #define MS_BODY         2       /* reading message body */
 276 #define MS_DISCARD      3       /* discarding rest of message */
 277
 278 void
 279 collect(fp, smtpmode, hdrp, e, rsetsize)
 280         SM_FILE_T *fp;
 281         bool smtpmode;
 282         HDR **hdrp;
 283         register ENVELOPE *e;
 284         bool rsetsize;
 285 {
 286         register SM_FILE_T *df;
 287         bool ignrdot;
 288         int dbto;
 289         register char *bp;
 290         int c;
 291         bool inputerr;
 292         bool headeronly;
 293         char *buf;
 294         int buflen;
 295         int istate;
 296         int mstate;
 297         int hdrslen;
 298         int numhdrs;
 299         int afd;
 300         unsigned char *pbp;
 301         unsigned char peekbuf[8];
 302         char bufbuf[MAXLINE];
 303
 304         df = NULL;
 305         ignrdot = smtpmode ? false : IgnrDot;
 306
 307         /* timeout for I/O functions is in milliseconds */
 308         dbto = smtpmode ? ((int) TimeOuts.to_datablock * 1000)
 309                         : SM_TIME_FOREVER;
 310         sm_io_setinfo(fp, SM_IO_WHAT_TIMEOUT, &dbto);
 311         set_tls_rd_tmo(TimeOuts.to_datablock);
 312         c = SM_IO_EOF;
 313         inputerr = false;
 314         headeronly = hdrp != NULL;
 315         hdrslen = 0;
 316         numhdrs = 0;
 317         HasEightBits = false;
 318         buf = bp = bufbuf;
 319         buflen = sizeof(bufbuf);
 320         pbp = peekbuf;
 321         istate = IS_BOL;
 322         mstate = SaveFrom ? MS_HEADER : MS_UFROM;
 323
 324         /*
 325         **  Tell ARPANET to go ahead.
 326         */
 327
 328         if (smtpmode)
 329                 message("354 Enter mail, end with \".\" on a line by itself");
 330
 331         /* simulate an I/O timeout when used as sink */
 332         if (tTd(83, 101))
 333                 sleep(319);
 334
 335         if (tTd(30, 2))
 336                 sm_dprintf("collect\n");
 337
 338         /*
 339         **  Read the message.
 340         **
 341         **      This is done using two interleaved state machines.
 342         **      The input state machine is looking for things like
 343         **      hidden dots; the message state machine is handling
 344         **      the larger picture (e.g., header versus body).
 345         */
 346
 347         if (rsetsize)
 348                 e->e_msgsize = 0;
 349         for (;;)
 350         {
 351                 if (tTd(30, 35))
 352                         sm_dprintf("top, istate=%d, mstate=%d\n", istate,
 353                                    mstate);
 354                 for (;;)
 355                 {
 356                         if (pbp > peekbuf)
 357                                 c = *--pbp;
 358                         else
 359                         {
 360                                 while (!sm_io_eof(fp) && !sm_io_error(fp))
 361                                 {
 362                                         errno = 0;
 363                                         c = sm_io_getc(fp, SM_TIME_DEFAULT);
 364                                         if (c == SM_IO_EOF && errno == EINTR)
 365                                         {
 366                                                 /* Interrupted, retry */
 367                                                 sm_io_clearerr(fp);
 368                                                 continue;
 369                                         }
 370
 371                                         /* timeout? */
 372                                         if (c == SM_IO_EOF && errno == EAGAIN
 373                                             && smtpmode)
 374                                         {
 375                                                 /*
 376                                                 **  Override e_message in
 377                                                 **  usrerr() as this is the
 378                                                 **  reason for failure that
 379                                                 **  should be logged for
 380                                                 **  undelivered recipients.
 381                                                 */
 382
 383                                                 e->e_message = NULL;
 384                                                 errno = 0;
 385                                                 inputerr = true;
 386                                                 goto readabort;
 387                                         }
 388                                         break;
 389                                 }
 390                                 if (TrafficLogFile != NULL && !headeronly)
 391                                 {
 392                                         if (istate == IS_BOL)
 393                                                 (void) sm_io_fprintf(TrafficLogFile,
 394                                                         SM_TIME_DEFAULT,
 395                                                         "%05d <<< ",
 396                                                         (int) CurrentPid);
 397                                         if (c == SM_IO_EOF)
 398                                                 (void) sm_io_fprintf(TrafficLogFile,
 399                                                         SM_TIME_DEFAULT,
 400                                                         "[EOF]\n");
 401                                         else
 402                                                 (void) sm_io_putc(TrafficLogFile,
 403                                                         SM_TIME_DEFAULT,
 404                                                         c);
 405                                 }
 406                                 if (c == SM_IO_EOF)
 407                                         goto readerr;
 408                                 if (SevenBitInput)
 409                                         c &= 0x7f;
 410                                 else
 411                                         HasEightBits |= bitset(0x80, c);
 412                         }
 413                         if (tTd(30, 94))
 414                                 sm_dprintf("istate=%d, c=%c (0x%x)\n",
 415                                         istate, (char) c, c);
 416                         switch (istate)
 417                         {
 418                           case IS_BOL:
 419                                 if (c == '.')
 420                                 {
 421                                         istate = IS_DOT;
 422                                         continue;
 423                                 }
 424                                 break;
 425
 426                           case IS_DOT:
 427                                 if (c == '\n' && !ignrdot &&
 428                                     !bitset(EF_NL_NOT_EOL, e->e_flags))
 429                                         goto readerr;
 430                                 else if (c == '\r' &&
 431                                          !bitset(EF_CRLF_NOT_EOL, e->e_flags))
 432                                 {
 433                                         istate = IS_DOTCR;
 434                                         continue;
 435                                 }
 436                                 else if (ignrdot ||
 437                                          (c != '.' &&
 438                                           OpMode != MD_SMTP &&
 439                                           OpMode != MD_DAEMON &&
 440                                           OpMode != MD_ARPAFTP))
 441
 442                                 {
 443                                         SM_ASSERT(pbp < peekbuf +
 444                                                         sizeof(peekbuf));
 445                                         *pbp++ = c;
 446                                         c = '.';
 447                                 }
 448                                 break;
 449
 450                           case IS_DOTCR:
 451                                 if (c == '\n' && !ignrdot)
 452                                         goto readerr;
 453                                 else
 454                                 {
 455                                         /* push back the ".\rx" */
 456                                         SM_ASSERT(pbp < peekbuf +
 457                                                         sizeof(peekbuf));
 458                                         *pbp++ = c;
 459                                         if (OpMode != MD_SMTP &&
 460                                             OpMode != MD_DAEMON &&
 461                                             OpMode != MD_ARPAFTP)
 462                                         {
 463                                                 SM_ASSERT(pbp < peekbuf +
 464                                                          sizeof(peekbuf));
 465                                                 *pbp++ = '\r';
 466                                                 c = '.';
 467                                         }
 468                                         else
 469                                                 c = '\r';
 470                                 }
 471                                 break;
 472
 473                           case IS_CR:
 474                                 if (c == '\n')
 475                                         istate = IS_BOL;
 476                                 else
 477                                 {
 478                                         (void) sm_io_ungetc(fp, SM_TIME_DEFAULT,
 479                                                             c);
 480                                         c = '\r';
 481                                         istate = IS_NORM;
 482                                 }
 483                                 goto bufferchar;
 484                         }
 485
 486                         if (c == '\r' && !bitset(EF_CRLF_NOT_EOL, e->e_flags))
 487                         {
 488                                 istate = IS_CR;
 489                                 continue;
 490                         }
 491                         else if (c == '\n' && !bitset(EF_NL_NOT_EOL,
 492                                                       e->e_flags))
 493                                 istate = IS_BOL;
 494                         else
 495                                 istate = IS_NORM;
 496
 497 bufferchar:
 498                         if (!headeronly)
 499                         {
 500                                 /* no overflow? */
 501                                 if (e->e_msgsize >= 0)
 502                                 {
 503                                         e->e_msgsize++;
 504                                         if (MaxMessageSize > 0 &&
 505                                             !bitset(EF_TOOBIG, e->e_flags) &&
 506                                             e->e_msgsize > MaxMessageSize)
 507                                                  e->e_flags |= EF_TOOBIG;
 508                                 }
 509                         }
 510                         switch (mstate)
 511                         {
 512                           case MS_BODY:
 513                                 /* just put the character out */
 514                                 if (!bitset(EF_TOOBIG, e->e_flags))
 515                                         (void) sm_io_putc(df, SM_TIME_DEFAULT,
 516                                                           c);
 517
 518                                 /* FALLTHROUGH */
 519
 520                           case MS_DISCARD:
 521                                 continue;
 522                         }
 523
 524                         SM_ASSERT(mstate == MS_UFROM || mstate == MS_HEADER);
 525
 526                         /* header -- buffer up */
 527                         if (bp >= &buf[buflen - 2])
 528                         {
 529                                 char *obuf;
 530
 531                                 /* out of space for header */
 532                                 obuf = buf;
 533                                 if (buflen < MEMCHUNKSIZE)
 534                                         buflen *= 2;
 535                                 else
 536                                         buflen += MEMCHUNKSIZE;
 537                                 if (buflen <= 0)
 538                                 {
 539                                         sm_syslog(LOG_NOTICE, e->e_id,
 540                                                   "header overflow from %s during message collect",
 541                                                   CURHOSTNAME);
 542                                         errno = 0;
 543                                         e->e_flags |= EF_CLRQUEUE;
 544                                         e->e_status = "5.6.0";
 545                                         usrerrenh(e->e_status,
 546                                                   "552 Headers too large");
 547                                         goto discard;
 548                                 }
 549                                 buf = xalloc(buflen);
 550                                 memmove(buf, obuf, bp - obuf);
 551                                 bp = &buf[bp - obuf];
 552                                 if (obuf != bufbuf)
 553                                         sm_free(obuf);  /* XXX */
 554                         }
 555
 556                         if (c != '\0')
 557                         {
 558                                 *bp++ = c;
 559                                 ++hdrslen;
 560                                 if (!headeronly &&
 561                                     MaxHeadersLength > 0 &&
 562                                     hdrslen > MaxHeadersLength)
 563                                 {
 564                                         sm_syslog(LOG_NOTICE, e->e_id,
 565                                                   "headers too large (%d max) from %s during message collect",
 566                                                   MaxHeadersLength,
 567                                                   CURHOSTNAME);
 568                                         errno = 0;
 569                                         e->e_flags |= EF_CLRQUEUE;
 570                                         e->e_status = "5.6.0";
 571                                         usrerrenh(e->e_status,
 572                                                   "552 Headers too large (%d max)",
 573                                                   MaxHeadersLength);
 574   discard:
 575                                         mstate = MS_DISCARD;
 576                                 }
 577                         }
 578                         if (istate == IS_BOL)
 579                                 break;
 580                 }
 581                 *bp = '\0';
 582
 583 nextstate:
 584                 if (tTd(30, 35))
 585                         sm_dprintf("nextstate, istate=%d, mstate=%d, line=\"%s\"\n",
 586                                 istate, mstate, buf);
 587                 switch (mstate)
 588                 {
 589                   case MS_UFROM:
 590                         mstate = MS_HEADER;
 591 #ifndef NOTUNIX
 592                         if (strncmp(buf, "From ", 5) == 0)
 593                         {
 594                                 bp = buf;
 595                                 eatfrom(buf, e);
 596                                 continue;
 597                         }
 598 #endif /* ! NOTUNIX */
 599                         /* FALLTHROUGH */
 600
 601                   case MS_HEADER:
 602                         if (!isheader(buf))
 603                         {
 604                                 mstate = MS_BODY;
 605                                 goto nextstate;
 606                         }
 607
 608                         /* check for possible continuation line */
 609                         do
 610                         {
 611                                 sm_io_clearerr(fp);
 612                                 errno = 0;
 613                                 c = sm_io_getc(fp, SM_TIME_DEFAULT);
 614
 615                                 /* timeout? */
 616                                 if (c == SM_IO_EOF && errno == EAGAIN
 617                                     && smtpmode)
 618                                 {
 619                                         /*
 620                                         **  Override e_message in
 621                                         **  usrerr() as this is the
 622                                         **  reason for failure that
 623                                         **  should be logged for
 624                                         **  undelivered recipients.
 625                                         */
 626
 627                                         e->e_message = NULL;
 628                                         errno = 0;
 629                                         inputerr = true;
 630                                         goto readabort;
 631                                 }
 632                         } while (c == SM_IO_EOF && errno == EINTR);
 633                         if (c != SM_IO_EOF)
 634                                 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, c);
 635                         if (c == ' ' || c == '\t')
 636                         {
 637                                 /* yep -- defer this */
 638                                 continue;
 639                         }
 640
 641                         SM_ASSERT(bp > buf);
 642
 643                         /* guaranteed by isheader(buf) */
 644                         SM_ASSERT(*(bp - 1) != '\n' || bp > buf + 1);
 645
 646                         /* trim off trailing CRLF or NL */
 647                         if (*--bp != '\n' || *--bp != '\r')
 648                                 bp++;
 649                         *bp = '\0';
 650
 651                         if (bitset(H_EOH, chompheader(buf,
 652                                                       CHHDR_CHECK | CHHDR_USER,
 653                                                       hdrp, e)))
 654                         {
 655                                 mstate = MS_BODY;
 656                                 goto nextstate;
 657                         }
 658                         numhdrs++;
 659                         break;
 660
 661                   case MS_BODY:
 662                         if (tTd(30, 1))
 663                                 sm_dprintf("EOH\n");
 664
 665                         if (headeronly)
 666                                 goto readerr;
 667
 668                         df = collect_eoh(e, numhdrs, hdrslen);
 669                         if (df == NULL)
 670                                 e->e_flags |= EF_TOOBIG;
 671
 672                         bp = buf;
 673
 674                         /* toss blank line */
 675                         if ((!bitset(EF_CRLF_NOT_EOL, e->e_flags) &&
 676                                 bp[0] == '\r' && bp[1] == '\n') ||
 677                             (!bitset(EF_NL_NOT_EOL, e->e_flags) &&
 678                                 bp[0] == '\n'))
 679                         {
 680                                 break;
 681                         }
 682
 683                         /* if not a blank separator, write it out */
 684                         if (!bitset(EF_TOOBIG, e->e_flags))
 685                         {
 686                                 while (*bp != '\0')
 687                                         (void) sm_io_putc(df, SM_TIME_DEFAULT,
 688                                                           *bp++);
 689                         }
 690                         break;
 691                 }
 692                 bp = buf;
 693         }
 694
 695 readerr:
 696         if ((sm_io_eof(fp) && smtpmode) || sm_io_error(fp))
 697         {
 698                 const char *errmsg;
 699
 700                 if (sm_io_eof(fp))
 701                         errmsg = "unexpected close";
 702                 else
 703                         errmsg = sm_errstring(errno);
 704                 if (tTd(30, 1))
 705                         sm_dprintf("collect: premature EOM: %s\n", errmsg);
 706                 if (LogLevel > 1)
 707                         sm_syslog(LOG_WARNING, e->e_id,
 708                                 "collect: premature EOM: %s", errmsg);
 709                 inputerr = true;
 710         }
 711
 712         if (headeronly)
 713                 return;
 714
 715         if (mstate != MS_BODY)
 716         {
 717                 /* no body or discard, so we never opened the data file */
 718                 SM_ASSERT(df == NULL);
 719                 df = collect_eoh(e, numhdrs, hdrslen);
 720         }
 721
 722         if (df == NULL)
 723         {
 724                 /* skip next few clauses */
 725                 /* EMPTY */
 726         }
 727         else if (sm_io_flush(df, SM_TIME_DEFAULT) != 0 || sm_io_error(df))
 728         {
 729                 dferror(df, "sm_io_flush||sm_io_error", e);
 730                 flush_errors(true);
 731                 finis(true, true, ExitStat);
 732                 /* NOTREACHED */
 733         }
 734         else if (SuperSafe == SAFE_NO ||
 735                  SuperSafe == SAFE_INTERACTIVE ||
 736                  (SuperSafe == SAFE_REALLY_POSTMILTER && smtpmode))
 737         {
 738                 /* skip next few clauses */
 739                 /* EMPTY */
 740                 /* Note: updfs() is not called in this case! */
 741         }
 742         else if (sm_io_setinfo(df, SM_BF_COMMIT, NULL) < 0 && errno != EINVAL)
 743         {
 744                 int save_errno = errno;
 745
 746                 if (save_errno == EEXIST)
 747                 {
 748                         char *dfile;
 749                         struct stat st;
 750                         int dfd;
 751
 752                         dfile = queuename(e, DATAFL_LETTER);
 753                         if (stat(dfile, &st) < 0)
 754                                 st.st_size = -1;
 755                         errno = EEXIST;
 756                         syserr("@collect: bfcommit(%s): already on disk, size=%ld",
 757                                dfile, (long) st.st_size);
 758                         dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL);
 759                         if (dfd >= 0)
 760                                 dumpfd(dfd, true, true);
 761                 }
 762                 errno = save_errno;
 763                 dferror(df, "bfcommit", e);
 764                 flush_errors(true);
 765                 finis(save_errno != EEXIST, true, ExitStat);
 766         }
 767         else if ((afd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL)) < 0)
 768         {
 769                 dferror(df, "sm_io_getinfo", e);
 770                 flush_errors(true);
 771                 finis(true, true, ExitStat);
 772                 /* NOTREACHED */
 773         }
 774         else if (fsync(afd) < 0)
 775         {
 776                 dferror(df, "fsync", e);
 777                 flush_errors(true);
 778                 finis(true, true, ExitStat);
 779                 /* NOTREACHED */
 780         }
 781         else if (sm_io_close(df, SM_TIME_DEFAULT) < 0)
 782         {
 783                 dferror(df, "sm_io_close", e);
 784                 flush_errors(true);
 785                 finis(true, true, ExitStat);
 786                 /* NOTREACHED */
 787         }
 788         else
 789         {
 790                 /* everything is happily flushed to disk */
 791                 df = NULL;
 792
 793                 /* remove from available space in filesystem */
 794                 updfs(e, 0, 1, "collect");
 795         }
 796
 797         /* An EOF when running SMTP is an error */
 798   readabort:
 799         if (inputerr && (OpMode == MD_SMTP || OpMode == MD_DAEMON))
 800         {
 801                 char *host;
 802                 char *problem;
 803                 ADDRESS *q;
 804
 805                 host = RealHostName;
 806                 if (host == NULL)
 807                         host = "localhost";
 808
 809                 if (sm_io_eof(fp))
 810                         problem = "unexpected close";
 811                 else if (sm_io_error(fp))
 812                         problem = "I/O error";
 813                 else
 814                         problem = "read timeout";
 815                 if (LogLevel > 0 && sm_io_eof(fp))
 816                         sm_syslog(LOG_NOTICE, e->e_id,
 817                                 "collect: %s on connection from %.100s, sender=%s",
 818                                 problem, host,
 819                                 shortenstring(e->e_from.q_paddr, MAXSHORTSTR));
 820                 if (sm_io_eof(fp))
 821                         usrerr("421 4.4.1 collect: %s on connection from %s, from=%s",
 822                                 problem, host,
 823                                 shortenstring(e->e_from.q_paddr, MAXSHORTSTR));
 824                 else
 825                         syserr("421 4.4.1 collect: %s on connection from %s, from=%s",
 826                                 problem, host,
 827                                 shortenstring(e->e_from.q_paddr, MAXSHORTSTR));
 828                 flush_errors(true);
 829
 830                 /* don't return an error indication */
 831                 e->e_to = NULL;
 832                 e->e_flags &= ~EF_FATALERRS;
 833                 e->e_flags |= EF_CLRQUEUE;
 834
 835                 /* Don't send any message notification to sender */
 836                 for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 837                 {
 838                         if (QS_IS_DEAD(q->q_state))
 839                                 continue;
 840                         q->q_state = QS_FATALERR;
 841                 }
 842
 843                 (void) sm_io_close(df, SM_TIME_DEFAULT);
 844                 df = NULL;
 845                 finis(true, true, ExitStat);
 846                 /* NOTREACHED */
 847         }
 848
 849         /* Log collection information. */
 850         if (tTd(92, 2))
 851                 sm_dprintf("collect: e_id=%s, EF_LOGSENDER=%d, LogLevel=%d\n",
 852                         e->e_id, bitset(EF_LOGSENDER, e->e_flags), LogLevel);
 853         if (bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4)
 854         {
 855                 logsender(e, e->e_msgid);
 856                 e->e_flags &= ~EF_LOGSENDER;
 857         }
 858
 859         /* check for message too large */
 860         if (bitset(EF_TOOBIG, e->e_flags))
 861         {
 862                 e->e_flags |= EF_NO_BODY_RETN|EF_CLRQUEUE;
 863                 if (!bitset(EF_FATALERRS, e->e_flags))
 864                 {
 865                         e->e_status = "5.2.3";
 866                         usrerrenh(e->e_status,
 867                                 "552 Message exceeds maximum fixed size (%ld)",
 868                                 MaxMessageSize);
 869                         if (LogLevel > 6)
 870                                 sm_syslog(LOG_NOTICE, e->e_id,
 871                                         "message size (%ld) exceeds maximum (%ld)",
 872                                         e->e_msgsize, MaxMessageSize);
 873                 }
 874         }
 875
 876         /* check for illegal 8-bit data */
 877         if (HasEightBits)
 878         {
 879                 e->e_flags |= EF_HAS8BIT;
 880                 if (!bitset(MM_PASS8BIT|MM_MIME8BIT, MimeMode) &&
 881                     !bitset(EF_IS_MIME, e->e_flags))
 882                 {
 883                         e->e_status = "5.6.1";
 884                         usrerrenh(e->e_status, "554 Eight bit data not allowed");
 885                 }
 886         }
 887         else
 888         {
 889                 /* if it claimed to be 8 bits, well, it lied.... */
 890                 if (e->e_bodytype != NULL &&
 891                     sm_strcasecmp(e->e_bodytype, "8BITMIME") == 0)
 892                         e->e_bodytype = "7BIT";
 893         }
 894
 895         if (SuperSafe == SAFE_REALLY && !bitset(EF_FATALERRS, e->e_flags))
 896         {
 897                 char *dfname = queuename(e, DATAFL_LETTER);
 898                 if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname,
 899                                            SM_IO_RDONLY_B, NULL)) == NULL)
 900                 {
 901                         /* we haven't acked receipt yet, so just chuck this */
 902                         syserr("@Cannot reopen %s", dfname);
 903                         finis(true, true, ExitStat);
 904                         /* NOTREACHED */
 905                 }
 906         }
 907         else
 908                 e->e_dfp = df;
 909
 910         /* collect statistics */
 911         if (OpMode != MD_VERIFY)
 912         {
 913                 /*
 914                 **  Recalculate e_msgpriority, it is done at in eatheader()
 915                 **  which is called (in 8.12) after the header is collected,
 916                 **  hence e_msgsize is (most likely) incorrect.
 917                 */
 918
 919                 e->e_msgpriority = e->e_msgsize
 920                                  - e->e_class * WkClassFact
 921                                  + e->e_nrcpts * WkRecipFact;
 922                 markstats(e, (ADDRESS *) NULL, STATS_NORMAL);
 923         }
 924 }
 925
 926 /*
 927 **  DFERROR -- signal error on writing the data file.
 928 **
 929 **      Called by collect().  Collect() always terminates the process
 930 **      immediately after calling dferror(), which means that the SMTP
 931 **      session will be terminated, which means that any error message
 932 **      issued by dferror must be a 421 error, as per RFC 821.
 933 **
 934 **      Parameters:
 935 **              df -- the file pointer for the data file.
 936 **              msg -- detailed message.
 937 **              e -- the current envelope.
 938 **
 939 **      Returns:
 940 **              none.
 941 **
 942 **      Side Effects:
 943 **              Gives an error message.
 944 **              Arranges for following output to go elsewhere.
 945 */
 946
 947 void
 948 dferror(df, msg, e)
 949         SM_FILE_T *volatile df;
 950         char *msg;
 951         register ENVELOPE *e;
 952 {
 953         char *dfname;
 954
 955         dfname = queuename(e, DATAFL_LETTER);
 956         setstat(EX_IOERR);
 957         if (errno == ENOSPC)
 958         {
 959 #if STAT64 > 0
 960                 struct stat64 st;
 961 #else /* STAT64 > 0 */
 962                 struct stat st;
 963 #endif /* STAT64 > 0 */
 964                 long avail;
 965                 long bsize;
 966
 967                 e->e_flags |= EF_NO_BODY_RETN;
 968
 969                 if (
 970 #if STAT64 > 0
 971                     fstat64(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st)
 972 #else /* STAT64 > 0 */
 973                     fstat(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st)
 974 #endif /* STAT64 > 0 */
 975                     < 0)
 976                   st.st_size = 0;
 977                 (void) sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, dfname,
 978                                     SM_IO_WRONLY_B, NULL, df);
 979                 if (st.st_size <= 0)
 980                         (void) sm_io_fprintf(df, SM_TIME_DEFAULT,
 981                                 "\n*** Mail could not be accepted");
 982                 else
 983                         (void) sm_io_fprintf(df, SM_TIME_DEFAULT,
 984                                 "\n*** Mail of at least %llu bytes could not be accepted\n",
 985                                 (ULONGLONG_T) st.st_size);
 986                 (void) sm_io_fprintf(df, SM_TIME_DEFAULT,
 987                         "*** at %s due to lack of disk space for temp file.\n",
 988                         MyHostName);
 989                 avail = freediskspace(qid_printqueue(e->e_qgrp, e->e_qdir),
 990                                       &bsize);
 991                 if (avail > 0)
 992                 {
 993                         if (bsize > 1024)
 994                                 avail *= bsize / 1024;
 995                         else if (bsize < 1024)
 996                                 avail /= 1024 / bsize;
 997                         (void) sm_io_fprintf(df, SM_TIME_DEFAULT,
 998                                 "*** Currently, %ld kilobytes are available for mail temp files.\n",
 999                                 avail);
1000                 }
1001 #if 0
1002                 /* Wrong response code; should be 421. */
1003                 e->e_status = "4.3.1";
1004                 usrerrenh(e->e_status, "452 Out of disk space for temp file");
1005 #else /* 0 */
1006                 syserr("421 4.3.1 Out of disk space for temp file");
1007 #endif /* 0 */
1008         }
1009         else
1010                 syserr("421 4.3.0 collect: Cannot write %s (%s, uid=%d, gid=%d)",
1011                         dfname, msg, (int) geteuid(), (int) getegid());
1012         if (sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL,
1013                          SM_IO_WRONLY, NULL, df) == NULL)
1014                 sm_syslog(LOG_ERR, e->e_id,
1015                           "dferror: sm_io_reopen(\"/dev/null\") failed: %s",
1016                           sm_errstring(errno));
1017 }
1018 /*
1019 **  EATFROM -- chew up a UNIX style from line and process
1020 **
1021 **      This does indeed make some assumptions about the format
1022 **      of UNIX messages.
1023 **
1024 **      Parameters:
1025 **              fm -- the from line.
1026 **              e -- envelope
1027 **
1028 **      Returns:
1029 **              none.
1030 **
1031 **      Side Effects:
1032 **              extracts what information it can from the header,
1033 **              such as the date.
1034 */
1035
1036 #ifndef NOTUNIX
1037
1038 static char     *DowList[] =
1039 {
1040         "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL
1041 };
1042
1043 static char     *MonthList[] =
1044 {
1045         "Jan", "Feb", "Mar", "Apr", "May", "Jun",
1046         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
1047         NULL
1048 };
1049
1050 static void
1051 eatfrom(fm, e)
1052         char *volatile fm;
1053         register ENVELOPE *e;
1054 {
1055         register char *p;
1056         register char **dt;
1057
1058         if (tTd(30, 2))
1059                 sm_dprintf("eatfrom(%s)\n", fm);
1060
1061         /* find the date part */
1062         p = fm;
1063         while (*p != '\0')
1064         {
1065                 /* skip a word */
1066                 while (*p != '\0' && *p != ' ')
1067                         p++;
1068                 while (*p == ' ')
1069                         p++;
1070                 if (strlen(p) < 17)
1071                 {
1072                         /* no room for the date */
1073                         return;
1074                 }
1075                 if (!(isascii(*p) && isupper(*p)) ||
1076                     p[3] != ' ' || p[13] != ':' || p[16] != ':')
1077                         continue;
1078
1079                 /* we have a possible date */
1080                 for (dt = DowList; *dt != NULL; dt++)
1081                         if (strncmp(*dt, p, 3) == 0)
1082                                 break;
1083                 if (*dt == NULL)
1084                         continue;
1085
1086                 for (dt = MonthList; *dt != NULL; dt++)
1087                 {
1088                         if (strncmp(*dt, &p[4], 3) == 0)
1089                                 break;
1090                 }
1091                 if (*dt != NULL)
1092                         break;
1093         }
1094
1095         if (*p != '\0')
1096         {
1097                 char *q, buf[25];
1098
1099                 /* we have found a date */
1100                 (void) sm_strlcpy(buf, p, sizeof(buf));
1101                 q = arpadate(buf);
1102                 macdefine(&e->e_macro, A_TEMP, 'a', q);
1103         }
1104 }
1105 #endif /* ! NOTUNIX */