usr.sbin/newsyslog/newsyslog.c

   1 /*-
   2  * ------+---------+---------+-------- + --------+---------+---------+---------*
   3  * This file includes significant modifications done by:
   4  * Copyright (c) 2003, 2004  - Garance Alistair Drosehn <gad@FreeBSD.org>.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *   1. Redistributions of source code must retain the above copyright
  11  *      notice, this list of conditions and the following disclaimer.
  12  *   2. Redistributions in binary form must reproduce the above copyright
  13  *      notice, this list of conditions and the following disclaimer in the
  14  *      documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * ------+---------+---------+-------- + --------+---------+---------+---------*
  29  */
  30
  31 /*
  32  * This file contains changes from the Open Software Foundation.
  33  */
  34
  35 /*
  36  * Copyright 1988, 1989 by the Massachusetts Institute of Technology
  37  *
  38  * Permission to use, copy, modify, and distribute this software and its
  39  * documentation for any purpose and without fee is hereby granted, provided
  40  * that the above copyright notice appear in all copies and that both that
  41  * copyright notice and this permission notice appear in supporting
  42  * documentation, and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
  43  * used in advertising or publicity pertaining to distribution of the
  44  * software without specific, written prior permission. M.I.T. and the M.I.T.
  45  * S.I.P.B. make no representations about the suitability of this software
  46  * for any purpose.  It is provided "as is" without express or implied
  47  * warranty.
  48  *
  49  */
  50
  51 /*
  52  * newsyslog - roll over selected logs at the appropriate time, keeping the a
  53  * specified number of backup files around.
  54  */
  55
  56 #include <sys/cdefs.h>
  57 __FBSDID("$FreeBSD$");
  58
  59 #define OSF
  60 #ifndef COMPRESS_POSTFIX
  61 #define COMPRESS_POSTFIX ".gz"
  62 #endif
  63 #ifndef BZCOMPRESS_POSTFIX
  64 #define BZCOMPRESS_POSTFIX ".bz2"
  65 #endif
  66
  67 #include <sys/param.h>
  68 #include <sys/queue.h>
  69 #include <sys/stat.h>
  70 #include <sys/wait.h>
  71
  72 #include <ctype.h>
  73 #include <err.h>
  74 #include <errno.h>
  75 #include <fcntl.h>
  76 #include <fnmatch.h>
  77 #include <glob.h>
  78 #include <grp.h>
  79 #include <paths.h>
  80 #include <pwd.h>
  81 #include <signal.h>
  82 #include <stdio.h>
  83 #include <stdlib.h>
  84 #include <string.h>
  85 #include <time.h>
  86 #include <unistd.h>
  87
  88 #include "pathnames.h"
  89 #include "extern.h"
  90
  91 /*
  92  * Bit-values for the 'flags' parsed from a config-file entry.
  93  */
  94 #define CE_COMPACT      0x0001  /* Compact the archived log files with gzip. */
  95 #define CE_BZCOMPACT    0x0002  /* Compact the archived log files with bzip2. */
  96 #define CE_BINARY       0x0008  /* Logfile is in binary, do not add status */
  97                                 /*    messages to logfile(s) when rotating. */
  98 #define CE_NOSIGNAL     0x0010  /* There is no process to signal when */
  99                                 /*    trimming this file. */
 100 #define CE_TRIMAT       0x0020  /* trim file at a specific time. */
 101 #define CE_GLOB         0x0040  /* name of the log is file name pattern. */
 102 #define CE_SIGNALGROUP  0x0080  /* Signal a process-group instead of a single */
 103                                 /*    process when trimming this file. */
 104 #define CE_CREATE       0x0100  /* Create the log file if it does not exist. */
 105 #define CE_NODUMP       0x0200  /* Set 'nodump' on newly created log file. */
 106
 107 #define MIN_PID         5       /* Don't touch pids lower than this */
 108 #define MAX_PID         99999   /* was lower, see /usr/include/sys/proc.h */
 109
 110 #define kbytes(size)  (((size) + 1023) >> 10)
 111
 112 #define DEFAULT_MARKER  "<default>"
 113 #define DEBUG_MARKER    "<debug>"
 114
 115 struct conf_entry {
 116         char *log;              /* Name of the log */
 117         char *pid_file;         /* PID file */
 118         char *r_reason;         /* The reason this file is being rotated */
 119         int firstcreate;        /* Creating log for the first time (-C). */
 120         int rotate;             /* Non-zero if this file should be rotated */
 121         int fsize;              /* size found for the log file */
 122         uid_t uid;              /* Owner of log */
 123         gid_t gid;              /* Group of log */
 124         int numlogs;            /* Number of logs to keep */
 125         int trsize;             /* Size cutoff to trigger trimming the log */
 126         int hours;              /* Hours between log trimming */
 127         struct ptime_data *trim_at;     /* Specific time to do trimming */
 128         unsigned int permissions;       /* File permissions on the log */
 129         int flags;              /* CE_COMPACT, CE_BZCOMPACT, CE_BINARY */
 130         int sig;                /* Signal to send */
 131         int def_cfg;            /* Using the <default> rule for this file */
 132         struct conf_entry *next;/* Linked list pointer */
 133 };
 134
 135 struct sigwork_entry {
 136         SLIST_ENTRY(sigwork_entry) sw_nextp;
 137         int      sw_signum;             /* the signal to send */
 138         int      sw_pidok;              /* true if pid value is valid */
 139         pid_t    sw_pid;                /* the process id from the PID file */
 140         const char *sw_pidtype;         /* "daemon" or "process group" */
 141         char     sw_fname[1];           /* file the PID was read from */
 142 };
 143
 144 struct zipwork_entry {
 145         SLIST_ENTRY(zipwork_entry) zw_nextp;
 146         const struct conf_entry *zw_conf;       /* for chown/perm/flag info */
 147         const struct sigwork_entry *zw_swork;   /* to know success of signal */
 148         int      zw_fsize;              /* size of the file to compress */
 149         char     zw_fname[1];           /* the file to compress */
 150 };
 151
 152 typedef enum {
 153         FREE_ENT, KEEP_ENT
 154 }       fk_entry;
 155
 156 SLIST_HEAD(swlisthead, sigwork_entry) swhead = SLIST_HEAD_INITIALIZER(swhead);
 157 SLIST_HEAD(zwlisthead, zipwork_entry) zwhead = SLIST_HEAD_INITIALIZER(zwhead);
 158
 159 int dbg_at_times;               /* -D Show details of 'trim_at' code */
 160
 161 int archtodir = 0;              /* Archive old logfiles to other directory */
 162 int createlogs;                 /* Create (non-GLOB) logfiles which do not */
 163                                 /*    already exist.  1=='for entries with */
 164                                 /*    C flag', 2=='for all entries'. */
 165 int verbose = 0;                /* Print out what's going on */
 166 int needroot = 1;               /* Root privs are necessary */
 167 int noaction = 0;               /* Don't do anything, just show it */
 168 int norotate = 0;               /* Don't rotate */
 169 int nosignal;                   /* Do not send any signals */
 170 int enforcepid = 0;             /* If PID file does not exist or empty, do nothing */
 171 int force = 0;                  /* Force the trim no matter what */
 172 int rotatereq = 0;              /* -R = Always rotate the file(s) as given */
 173                                 /*    on the command (this also requires   */
 174                                 /*    that a list of files *are* given on  */
 175                                 /*    the run command). */
 176 char *requestor;                /* The name given on a -R request */
 177 char *archdirname;              /* Directory path to old logfiles archive */
 178 char *destdir = NULL;           /* Directory to treat at root for logs */
 179 const char *conf;               /* Configuration file to use */
 180
 181 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */
 182 struct ptime_data *timenow;     /* The time to use for checking at-fields */
 183
 184 #define DAYTIME_LEN     16
 185 char daytime[DAYTIME_LEN];      /* The current time in human readable form,
 186                                  * used for rotation-tracking messages. */
 187 char hostname[MAXHOSTNAMELEN];  /* hostname */
 188
 189 static struct conf_entry *get_worklist(char **files);
 190 static void parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p,
 191                 struct conf_entry **glob_p, struct conf_entry **defconf_p);
 192 static char *sob(char *p);
 193 static char *son(char *p);
 194 static int isnumberstr(const char *);
 195 static char *missing_field(char *p, char *errline);
 196 static void      change_attrs(const char *, const struct conf_entry *);
 197 static fk_entry  do_entry(struct conf_entry *);
 198 static fk_entry  do_rotate(const struct conf_entry *);
 199 static void      do_sigwork(struct sigwork_entry *);
 200 static void      do_zipwork(struct zipwork_entry *);
 201 static struct sigwork_entry *
 202                  save_sigwork(const struct conf_entry *);
 203 static struct zipwork_entry *
 204                  save_zipwork(const struct conf_entry *, const struct
 205                     sigwork_entry *, int, const char *);
 206 static void      set_swpid(struct sigwork_entry *, const struct conf_entry *);
 207 static int       sizefile(const char *);
 208 static void expand_globs(struct conf_entry **work_p,
 209                 struct conf_entry **glob_p);
 210 static void free_clist(struct conf_entry **firstent);
 211 static void free_entry(struct conf_entry *ent);
 212 static struct conf_entry *init_entry(const char *fname,
 213                 struct conf_entry *src_entry);
 214 static void parse_args(int argc, char **argv);
 215 static int parse_doption(const char *doption);
 216 static void usage(void);
 217 static int log_trim(const char *logname, const struct conf_entry *log_ent);
 218 static int age_old_log(char *file);
 219 static void savelog(char *from, char *to);
 220 static void createdir(const struct conf_entry *ent, char *dirpart);
 221 static void createlog(const struct conf_entry *ent);
 222
 223 /*
 224  * All the following take a parameter of 'int', but expect values in the
 225  * range of unsigned char.  Define wrappers which take values of type 'char',
 226  * whether signed or unsigned, and ensure they end up in the right range.
 227  */
 228 #define isdigitch(Anychar) isdigit((u_char)(Anychar))
 229 #define isprintch(Anychar) isprint((u_char)(Anychar))
 230 #define isspacech(Anychar) isspace((u_char)(Anychar))
 231 #define tolowerch(Anychar) tolower((u_char)(Anychar))
 232
 233 int
 234 main(int argc, char **argv)
 235 {
 236         fk_entry free_or_keep;
 237         struct conf_entry *p, *q;
 238         struct sigwork_entry *stmp;
 239         struct zipwork_entry *ztmp;
 240
 241         SLIST_INIT(&swhead);
 242         SLIST_INIT(&zwhead);
 243
 244         parse_args(argc, argv);
 245         argc -= optind;
 246         argv += optind;
 247
 248         if (needroot && getuid() && geteuid())
 249                 errx(1, "must have root privs");
 250         p = q = get_worklist(argv);
 251
 252         /*
 253          * Rotate all the files which need to be rotated.  Note that
 254          * some users have *hundreds* of entries in newsyslog.conf!
 255          */
 256         while (p) {
 257                 free_or_keep = do_entry(p);
 258                 p = p->next;
 259                 if (free_or_keep == FREE_ENT)
 260                         free_entry(q);
 261                 q = p;
 262         }
 263
 264         /*
 265          * Send signals to any processes which need a signal to tell
 266          * them to close and re-open the log file(s) we have rotated.
 267          * Note that zipwork_entries include pointers to these
 268          * sigwork_entry's, so we can not free the entries here.
 269          */
 270         if (!SLIST_EMPTY(&swhead)) {
 271                 if (noaction || verbose)
 272                         printf("Signal all daemon process(es)...\n");
 273                 SLIST_FOREACH(stmp, &swhead, sw_nextp)
 274                         do_sigwork(stmp);
 275                 if (noaction)
 276                         printf("\tsleep 10\n");
 277                 else {
 278                         if (verbose)
 279                                 printf("Pause 10 seconds to allow daemon(s)"
 280                                     " to close log file(s)\n");
 281                         sleep(10);
 282                 }
 283         }
 284         /*
 285          * Compress all files that we're expected to compress, now
 286          * that all processes should have closed the files which
 287          * have been rotated.
 288          */
 289         if (!SLIST_EMPTY(&zwhead)) {
 290                 if (noaction || verbose)
 291                         printf("Compress all rotated log file(s)...\n");
 292                 while (!SLIST_EMPTY(&zwhead)) {
 293                         ztmp = SLIST_FIRST(&zwhead);
 294                         do_zipwork(ztmp);
 295                         SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
 296                         free(ztmp);
 297                 }
 298         }
 299         /* Now free all the sigwork entries. */
 300         while (!SLIST_EMPTY(&swhead)) {
 301                 stmp = SLIST_FIRST(&swhead);
 302                 SLIST_REMOVE_HEAD(&swhead, sw_nextp);
 303                 free(stmp);
 304         }
 305
 306         while (wait(NULL) > 0 || errno == EINTR)
 307                 ;
 308         return (0);
 309 }
 310
 311 static struct conf_entry *
 312 init_entry(const char *fname, struct conf_entry *src_entry)
 313 {
 314         struct conf_entry *tempwork;
 315
 316         if (verbose > 4)
 317                 printf("\t--> [creating entry for %s]\n", fname);
 318
 319         tempwork = malloc(sizeof(struct conf_entry));
 320         if (tempwork == NULL)
 321                 err(1, "malloc of conf_entry for %s", fname);
 322
 323         if (destdir == NULL || fname[0] != '/')
 324                 tempwork->log = strdup(fname);
 325         else
 326                 asprintf(&tempwork->log, "%s%s", destdir, fname);
 327         if (tempwork->log == NULL)
 328                 err(1, "strdup for %s", fname);
 329
 330         if (src_entry != NULL) {
 331                 tempwork->pid_file = NULL;
 332                 if (src_entry->pid_file)
 333                         tempwork->pid_file = strdup(src_entry->pid_file);
 334                 tempwork->r_reason = NULL;
 335                 tempwork->firstcreate = 0;
 336                 tempwork->rotate = 0;
 337                 tempwork->fsize = -1;
 338                 tempwork->uid = src_entry->uid;
 339                 tempwork->gid = src_entry->gid;
 340                 tempwork->numlogs = src_entry->numlogs;
 341                 tempwork->trsize = src_entry->trsize;
 342                 tempwork->hours = src_entry->hours;
 343                 tempwork->trim_at = NULL;
 344                 if (src_entry->trim_at != NULL)
 345                         tempwork->trim_at = ptime_init(src_entry->trim_at);
 346                 tempwork->permissions = src_entry->permissions;
 347                 tempwork->flags = src_entry->flags;
 348                 tempwork->sig = src_entry->sig;
 349                 tempwork->def_cfg = src_entry->def_cfg;
 350         } else {
 351                 /* Initialize as a "do-nothing" entry */
 352                 tempwork->pid_file = NULL;
 353                 tempwork->r_reason = NULL;
 354                 tempwork->firstcreate = 0;
 355                 tempwork->rotate = 0;
 356                 tempwork->fsize = -1;
 357                 tempwork->uid = (uid_t)-1;
 358                 tempwork->gid = (gid_t)-1;
 359                 tempwork->numlogs = 1;
 360                 tempwork->trsize = -1;
 361                 tempwork->hours = -1;
 362                 tempwork->trim_at = NULL;
 363                 tempwork->permissions = 0;
 364                 tempwork->flags = 0;
 365                 tempwork->sig = SIGHUP;
 366                 tempwork->def_cfg = 0;
 367         }
 368         tempwork->next = NULL;
 369
 370         return (tempwork);
 371 }
 372
 373 static void
 374 free_entry(struct conf_entry *ent)
 375 {
 376
 377         if (ent == NULL)
 378                 return;
 379
 380         if (ent->log != NULL) {
 381                 if (verbose > 4)
 382                         printf("\t--> [freeing entry for %s]\n", ent->log);
 383                 free(ent->log);
 384                 ent->log = NULL;
 385         }
 386
 387         if (ent->pid_file != NULL) {
 388                 free(ent->pid_file);
 389                 ent->pid_file = NULL;
 390         }
 391
 392         if (ent->r_reason != NULL) {
 393                 free(ent->r_reason);
 394                 ent->r_reason = NULL;
 395         }
 396
 397         if (ent->trim_at != NULL) {
 398                 ptime_free(ent->trim_at);
 399                 ent->trim_at = NULL;
 400         }
 401
 402         free(ent);
 403 }
 404
 405 static void
 406 free_clist(struct conf_entry **firstent)
 407 {
 408         struct conf_entry *ent, *nextent;
 409
 410         if (firstent == NULL)
 411                 return;                 /* There is nothing to do. */
 412
 413         ent = *firstent;
 414         firstent = NULL;
 415
 416         while (ent) {
 417                 nextent = ent->next;
 418                 free_entry(ent);
 419                 ent = nextent;
 420         }
 421 }
 422
 423 static fk_entry
 424 do_entry(struct conf_entry * ent)
 425 {
 426 #define REASON_MAX      80
 427         int modtime;
 428         fk_entry free_or_keep;
 429         double diffsecs;
 430         char temp_reason[REASON_MAX];
 431
 432         free_or_keep = FREE_ENT;
 433         if (verbose) {
 434                 if (ent->flags & CE_COMPACT)
 435                         printf("%s <%dZ>: ", ent->log, ent->numlogs);
 436                 else if (ent->flags & CE_BZCOMPACT)
 437                         printf("%s <%dJ>: ", ent->log, ent->numlogs);
 438                 else
 439                         printf("%s <%d>: ", ent->log, ent->numlogs);
 440         }
 441         ent->fsize = sizefile(ent->log);
 442         modtime = age_old_log(ent->log);
 443         ent->rotate = 0;
 444         ent->firstcreate = 0;
 445         if (ent->fsize < 0) {
 446                 /*
 447                  * If either the C flag or the -C option was specified,
 448                  * and if we won't be creating the file, then have the
 449                  * verbose message include a hint as to why the file
 450                  * will not be created.
 451                  */
 452                 temp_reason[0] = '\0';
 453                 if (createlogs > 1)
 454                         ent->firstcreate = 1;
 455                 else if ((ent->flags & CE_CREATE) && createlogs)
 456                         ent->firstcreate = 1;
 457                 else if (ent->flags & CE_CREATE)
 458                         strlcpy(temp_reason, " (no -C option)", REASON_MAX);
 459                 else if (createlogs)
 460                         strlcpy(temp_reason, " (no C flag)", REASON_MAX);
 461
 462                 if (ent->firstcreate) {
 463                         if (verbose)
 464                                 printf("does not exist -> will create.\n");
 465                         createlog(ent);
 466                 } else if (verbose) {
 467                         printf("does not exist, skipped%s.\n", temp_reason);
 468                 }
 469         } else {
 470                 if (ent->flags & CE_TRIMAT && !force && !rotatereq) {
 471                         diffsecs = ptimeget_diff(timenow, ent->trim_at);
 472                         if (diffsecs < 0.0) {
 473                                 /* trim_at is some time in the future. */
 474                                 if (verbose) {
 475                                         ptime_adjust4dst(ent->trim_at,
 476                                             timenow);
 477                                         printf("--> will trim at %s",
 478                                             ptimeget_ctime(ent->trim_at));
 479                                 }
 480                                 return (free_or_keep);
 481                         } else if (diffsecs >= 3600.0) {
 482                                 /*
 483                                  * trim_at is more than an hour in the past,
 484                                  * so find the next valid trim_at time, and
 485                                  * tell the user what that will be.
 486                                  */
 487                                 if (verbose && dbg_at_times)
 488                                         printf("\n\t--> prev trim at %s\t",
 489                                             ptimeget_ctime(ent->trim_at));
 490                                 if (verbose) {
 491                                         ptimeset_nxtime(ent->trim_at);
 492                                         printf("--> will trim at %s",
 493                                             ptimeget_ctime(ent->trim_at));
 494                                 }
 495                                 return (free_or_keep);
 496                         } else if (verbose && noaction && dbg_at_times) {
 497                                 /*
 498                                  * If we are just debugging at-times, then
 499                                  * a detailed message is helpful.  Also
 500                                  * skip "doing" any commands, since they
 501                                  * would all be turned off by no-action.
 502                                  */
 503                                 printf("\n\t--> timematch at %s",
 504                                     ptimeget_ctime(ent->trim_at));
 505                                 return (free_or_keep);
 506                         } else if (verbose && ent->hours <= 0) {
 507                                 printf("--> time is up\n");
 508                         }
 509                 }
 510                 if (verbose && (ent->trsize > 0))
 511                         printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
 512                 if (verbose && (ent->hours > 0))
 513                         printf(" age (hr): %d [%d] ", modtime, ent->hours);
 514
 515                 /*
 516                  * Figure out if this logfile needs to be rotated.
 517                  */
 518                 temp_reason[0] = '\0';
 519                 if (rotatereq) {
 520                         ent->rotate = 1;
 521                         snprintf(temp_reason, REASON_MAX, " due to -R from %s",
 522                             requestor);
 523                 } else if (force) {
 524                         ent->rotate = 1;
 525                         snprintf(temp_reason, REASON_MAX, " due to -F request");
 526                 } else if ((ent->trsize > 0) && (ent->fsize >= ent->trsize)) {
 527                         ent->rotate = 1;
 528                         snprintf(temp_reason, REASON_MAX, " due to size>%dK",
 529                             ent->trsize);
 530                 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
 531                         ent->rotate = 1;
 532                 } else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
 533                     (modtime < 0))) {
 534                         ent->rotate = 1;
 535                 }
 536
 537                 /*
 538                  * If the file needs to be rotated, then rotate it.
 539                  */
 540                 if (ent->rotate && !norotate) {
 541                         if (temp_reason[0] != '\0')
 542                                 ent->r_reason = strdup(temp_reason);
 543                         if (verbose)
 544                                 printf("--> trimming log....\n");
 545                         if (noaction && !verbose) {
 546                                 if (ent->flags & CE_COMPACT)
 547                                         printf("%s <%dZ>: trimming\n",
 548                                             ent->log, ent->numlogs);
 549                                 else if (ent->flags & CE_BZCOMPACT)
 550                                         printf("%s <%dJ>: trimming\n",
 551                                             ent->log, ent->numlogs);
 552                                 else
 553                                         printf("%s <%d>: trimming\n",
 554                                             ent->log, ent->numlogs);
 555                         }
 556                         free_or_keep = do_rotate(ent);
 557                 } else {
 558                         if (verbose)
 559                                 printf("--> skipping\n");
 560                 }
 561         }
 562         return (free_or_keep);
 563 #undef REASON_MAX
 564 }
 565
 566 static void
 567 parse_args(int argc, char **argv)
 568 {
 569         int ch;
 570         char *p;
 571
 572         timenow = ptime_init(NULL);
 573         ptimeset_time(timenow, time(NULL));
 574         strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN);
 575
 576         /* Let's get our hostname */
 577         (void)gethostname(hostname, sizeof(hostname));
 578
 579         /* Truncate domain */
 580         if ((p = strchr(hostname, '.')) != NULL)
 581                 *p = '\0';
 582
 583         /* Parse command line options. */
 584         while ((ch = getopt(argc, argv, "a:d:f:nrsvCD:FNPR:")) != -1)
 585                 switch (ch) {
 586                 case 'a':
 587                         archtodir++;
 588                         archdirname = optarg;
 589                         break;
 590                 case 'd':
 591                         destdir = optarg;
 592                         break;
 593                 case 'f':
 594                         conf = optarg;
 595                         break;
 596                 case 'n':
 597                         noaction++;
 598                         break;
 599                 case 'r':
 600                         needroot = 0;
 601                         break;
 602                 case 's':
 603                         nosignal = 1;
 604                         break;
 605                 case 'v':
 606                         verbose++;
 607                         break;
 608                 case 'C':
 609                         /* Useful for things like rc.diskless... */
 610                         createlogs++;
 611                         break;
 612                 case 'D':
 613                         /*
 614                          * Set some debugging option.  The specific option
 615                          * depends on the value of optarg.  These options
 616                          * may come and go without notice or documentation.
 617                          */
 618                         if (parse_doption(optarg))
 619                                 break;
 620                         usage();
 621                         /* NOTREACHED */
 622                 case 'F':
 623                         force++;
 624                         break;
 625                 case 'N':
 626                         norotate++;
 627                         break;
 628                 case 'P':
 629                         enforcepid++;
 630                         break;
 631                 case 'R':
 632                         rotatereq++;
 633                         requestor = strdup(optarg);
 634                         break;
 635                 case 'm':       /* Used by OpenBSD for "monitor mode" */
 636                 default:
 637                         usage();
 638                         /* NOTREACHED */
 639                 }
 640
 641         if (force && norotate) {
 642                 warnx("Only one of -F and -N may be specified.");
 643                 usage();
 644                 /* NOTREACHED */
 645         }
 646
 647         if (rotatereq) {
 648                 if (optind == argc) {
 649                         warnx("At least one filename must be given when -R is specified.");
 650                         usage();
 651                         /* NOTREACHED */
 652                 }
 653                 /* Make sure "requestor" value is safe for a syslog message. */
 654                 for (p = requestor; *p != '\0'; p++) {
 655                         if (!isprintch(*p) && (*p != '\t'))
 656                                 *p = '.';
 657                 }
 658         }
 659
 660         if (dbg_timenow) {
 661                 /*
 662                  * Note that the 'daytime' variable is not changed.
 663                  * That is only used in messages that track when a
 664                  * logfile is rotated, and if a file *is* rotated,
 665                  * then it will still rotated at the "real now" time.
 666                  */
 667                 ptime_free(timenow);
 668                 timenow = dbg_timenow;
 669                 fprintf(stderr, "Debug: Running as if TimeNow is %s",
 670                     ptimeget_ctime(dbg_timenow));
 671         }
 672
 673 }
 674
 675 /*
 676  * These debugging options are mainly meant for developer use, such
 677  * as writing regression-tests.  They would not be needed by users
 678  * during normal operation of newsyslog...
 679  */
 680 static int
 681 parse_doption(const char *doption)
 682 {
 683         const char TN[] = "TN=";
 684         int res;
 685
 686         if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
 687                 /*
 688                  * The "TimeNow" debugging option.  This might be off
 689                  * by an hour when crossing a timezone change.
 690                  */
 691                 dbg_timenow = ptime_init(NULL);
 692                 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
 693                     time(NULL), doption + sizeof(TN) - 1);
 694                 if (res == -2) {
 695                         warnx("Non-existent time specified on -D %s", doption);
 696                         return (0);                     /* failure */
 697                 } else if (res < 0) {
 698                         warnx("Malformed time given on -D %s", doption);
 699                         return (0);                     /* failure */
 700                 }
 701                 return (1);                     /* successfully parsed */
 702
 703         }
 704
 705         if (strcmp(doption, "ats") == 0) {
 706                 dbg_at_times++;
 707                 return (1);                     /* successfully parsed */
 708         }
 709
 710         /* XXX - This check could probably be dropped. */
 711         if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder")
 712             == 0)) {
 713                 warnx("NOTE: newsyslog always uses 'neworder'.");
 714                 return (1);                     /* successfully parsed */
 715         }
 716
 717         warnx("Unknown -D (debug) option: '%s'", doption);
 718         return (0);                             /* failure */
 719 }
 720
 721 static void
 722 usage(void)
 723 {
 724
 725         fprintf(stderr,
 726             "usage: newsyslog [-CFNnrsv] [-a directory] [-d directory] [-f config-file]\n"
 727             "                 [ [-R requestor] filename ... ]\n");
 728         exit(1);
 729 }
 730
 731 /*
 732  * Parse a configuration file and return a linked list of all the logs
 733  * which should be processed.
 734  */
 735 static struct conf_entry *
 736 get_worklist(char **files)
 737 {
 738         FILE *f;
 739         const char *fname;
 740         char **given;
 741         struct conf_entry *defconf, *dupent, *ent, *firstnew;
 742         struct conf_entry *globlist, *lastnew, *worklist;
 743         int gmatch, fnres;
 744
 745         defconf = globlist = worklist = NULL;
 746
 747         fname = conf;
 748         if (fname == NULL)
 749                 fname = _PATH_CONF;
 750
 751         if (strcmp(fname, "-") != 0)
 752                 f = fopen(fname, "r");
 753         else {
 754                 f = stdin;
 755                 fname = "<stdin>";
 756         }
 757         if (!f)
 758                 err(1, "%s", fname);
 759
 760         parse_file(f, fname, &worklist, &globlist, &defconf);
 761         (void) fclose(f);
 762
 763         /*
 764          * All config-file information has been read in and turned into
 765          * a worklist and a globlist.  If there were no specific files
 766          * given on the run command, then the only thing left to do is to
 767          * call a routine which finds all files matched by the globlist
 768          * and adds them to the worklist.  Then return the worklist.
 769          */
 770         if (*files == NULL) {
 771                 expand_globs(&worklist, &globlist);
 772                 free_clist(&globlist);
 773                 if (defconf != NULL)
 774                         free_entry(defconf);
 775                 return (worklist);
 776                 /* NOTREACHED */
 777         }
 778
 779         /*
 780          * If newsyslog was given a specific list of files to process,
 781          * it may be that some of those files were not listed in any
 782          * config file.  Those unlisted files should get the default
 783          * rotation action.  First, create the default-rotation action
 784          * if none was found in a system config file.
 785          */
 786         if (defconf == NULL) {
 787                 defconf = init_entry(DEFAULT_MARKER, NULL);
 788                 defconf->numlogs = 3;
 789                 defconf->trsize = 50;
 790                 defconf->permissions = S_IRUSR|S_IWUSR;
 791         }
 792
 793         /*
 794          * If newsyslog was run with a list of specific filenames,
 795          * then create a new worklist which has only those files in
 796          * it, picking up the rotation-rules for those files from
 797          * the original worklist.
 798          *
 799          * XXX - Note that this will copy multiple rules for a single
 800          *      logfile, if multiple entries are an exact match for
 801          *      that file.  That matches the historic behavior, but do
 802          *      we want to continue to allow it?  If so, it should
 803          *      probably be handled more intelligently.
 804          */
 805         firstnew = lastnew = NULL;
 806         for (given = files; *given; ++given) {
 807                 /*
 808                  * First try to find exact-matches for this given file.
 809                  */
 810                 gmatch = 0;
 811                 for (ent = worklist; ent; ent = ent->next) {
 812                         if (strcmp(ent->log, *given) == 0) {
 813                                 gmatch++;
 814                                 dupent = init_entry(*given, ent);
 815                                 if (!firstnew)
 816                                         firstnew = dupent;
 817                                 else
 818                                         lastnew->next = dupent;
 819                                 lastnew = dupent;
 820                         }
 821                 }
 822                 if (gmatch) {
 823                         if (verbose > 2)
 824                                 printf("\t+ Matched entry %s\n", *given);
 825                         continue;
 826                 }
 827
 828                 /*
 829                  * There was no exact-match for this given file, so look
 830                  * for a "glob" entry which does match.
 831                  */
 832                 gmatch = 0;
 833                 if (verbose > 2 && globlist != NULL)
 834                         printf("\t+ Checking globs for %s\n", *given);
 835                 for (ent = globlist; ent; ent = ent->next) {
 836                         fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
 837                         if (verbose > 2)
 838                                 printf("\t+    = %d for pattern %s\n", fnres,
 839                                     ent->log);
 840                         if (fnres == 0) {
 841                                 gmatch++;
 842                                 dupent = init_entry(*given, ent);
 843                                 if (!firstnew)
 844                                         firstnew = dupent;
 845                                 else
 846                                         lastnew->next = dupent;
 847                                 lastnew = dupent;
 848                                 /* This new entry is not a glob! */
 849                                 dupent->flags &= ~CE_GLOB;
 850                                 /* Only allow a match to one glob-entry */
 851                                 break;
 852                         }
 853                 }
 854                 if (gmatch) {
 855                         if (verbose > 2)
 856                                 printf("\t+ Matched %s via %s\n", *given,
 857                                     ent->log);
 858                         continue;
 859                 }
 860
 861                 /*
 862                  * This given file was not found in any config file, so
 863                  * add a worklist item based on the default entry.
 864                  */
 865                 if (verbose > 2)
 866                         printf("\t+ No entry matched %s  (will use %s)\n",
 867                             *given, DEFAULT_MARKER);
 868                 dupent = init_entry(*given, defconf);
 869                 if (!firstnew)
 870                         firstnew = dupent;
 871                 else
 872                         lastnew->next = dupent;
 873                 /* Mark that it was *not* found in a config file */
 874                 dupent->def_cfg = 1;
 875                 lastnew = dupent;
 876         }
 877
 878         /*
 879          * Free all the entries in the original work list, the list of
 880          * glob entries, and the default entry.
 881          */
 882         free_clist(&worklist);
 883         free_clist(&globlist);
 884         free_entry(defconf);
 885
 886         /* And finally, return a worklist which matches the given files. */
 887         return (firstnew);
 888 }
 889
 890 /*
 891  * Expand the list of entries with filename patterns, and add all files
 892  * which match those glob-entries onto the worklist.
 893  */
 894 static void
 895 expand_globs(struct conf_entry **work_p, struct conf_entry **glob_p)
 896 {
 897         int gmatch, gres;
 898         size_t i;
 899         char *mfname;
 900         struct conf_entry *dupent, *ent, *firstmatch, *globent;
 901         struct conf_entry *lastmatch;
 902         glob_t pglob;
 903         struct stat st_fm;
 904
 905         if ((glob_p == NULL) || (*glob_p == NULL))
 906                 return;                 /* There is nothing to do. */
 907
 908         /*
 909          * The worklist contains all fully-specified (non-GLOB) names.
 910          *
 911          * Now expand the list of filename-pattern (GLOB) entries into
 912          * a second list, which (by definition) will only match files
 913          * that already exist.  Do not add a glob-related entry for any
 914          * file which already exists in the fully-specified list.
 915          */
 916         firstmatch = lastmatch = NULL;
 917         for (globent = *glob_p; globent; globent = globent->next) {
 918
 919                 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
 920                 if (gres != 0) {
 921                         warn("cannot expand pattern (%d): %s", gres,
 922                             globent->log);
 923                         continue;
 924                 }
 925
 926                 if (verbose > 2)
 927                         printf("\t+ Expanding pattern %s\n", globent->log);
 928                 for (i = 0; i < pglob.gl_matchc; i++) {
 929                         mfname = pglob.gl_pathv[i];
 930
 931                         /* See if this file already has a specific entry. */
 932                         gmatch = 0;
 933                         for (ent = *work_p; ent; ent = ent->next) {
 934                                 if (strcmp(mfname, ent->log) == 0) {
 935                                         gmatch++;
 936                                         break;
 937                                 }
 938                         }
 939                         if (gmatch)
 940                                 continue;
 941
 942                         /* Make sure the named matched is a file. */
 943                         gres = lstat(mfname, &st_fm);
 944                         if (gres != 0) {
 945                                 /* Error on a file that glob() matched?!? */
 946                                 warn("Skipping %s - lstat() error", mfname);
 947                                 continue;
 948                         }
 949                         if (!S_ISREG(st_fm.st_mode)) {
 950                                 /* We only rotate files! */
 951                                 if (verbose > 2)
 952                                         printf("\t+  . skipping %s (!file)\n",
 953                                             mfname);
 954                                 continue;
 955                         }
 956
 957                         if (verbose > 2)
 958                                 printf("\t+  . add file %s\n", mfname);
 959                         dupent = init_entry(mfname, globent);
 960                         if (!firstmatch)
 961                                 firstmatch = dupent;
 962                         else
 963                                 lastmatch->next = dupent;
 964                         lastmatch = dupent;
 965                         /* This new entry is not a glob! */
 966                         dupent->flags &= ~CE_GLOB;
 967                 }
 968                 globfree(&pglob);
 969                 if (verbose > 2)
 970                         printf("\t+ Done with pattern %s\n", globent->log);
 971         }
 972
 973         /* Add the list of matched files to the end of the worklist. */
 974         if (!*work_p)
 975                 *work_p = firstmatch;
 976         else {
 977                 ent = *work_p;
 978                 while (ent->next)
 979                         ent = ent->next;
 980                 ent->next = firstmatch;
 981         }
 982
 983 }
 984
 985 /*
 986  * Parse a configuration file and update a linked list of all the logs to
 987  * process.
 988  */
 989 static void
 990 parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p,
 991     struct conf_entry **glob_p, struct conf_entry **defconf_p)
 992 {
 993         char line[BUFSIZ], *parse, *q;
 994         char *cp, *errline, *group;
 995         struct conf_entry *lastglob, *lastwork, *working;
 996         struct passwd *pwd;
 997         struct group *grp;
 998         int eol, ptm_opts, res, special;
 999
1000         /*
1001          * XXX - for now, assume that only one config file will be read,
1002          *      ie, this routine is only called one time.
1003          */
1004         lastglob = lastwork = NULL;
1005
1006         errline = NULL;
1007         while (fgets(line, BUFSIZ, cf)) {
1008                 if ((line[0] == '\n') || (line[0] == '#') ||
1009                     (strlen(line) == 0))
1010                         continue;
1011                 if (errline != NULL)
1012                         free(errline);
1013                 errline = strdup(line);
1014                 for (cp = line + 1; *cp != '\0'; cp++) {
1015                         if (*cp != '#')
1016                                 continue;
1017                         if (*(cp - 1) == '\\') {
1018                                 strcpy(cp - 1, cp);
1019                                 cp--;
1020                                 continue;
1021                         }
1022                         *cp = '\0';
1023                         break;
1024                 }
1025
1026                 q = parse = missing_field(sob(line), errline);
1027                 parse = son(line);
1028                 if (!*parse)
1029                         errx(1, "malformed line (missing fields):\n%s",
1030                             errline);
1031                 *parse = '\0';
1032
1033                 /*
1034                  * Allow people to set debug options via the config file.
1035                  * (NOTE: debug optons are undocumented, and may disappear
1036                  * at any time, etc).
1037                  */
1038                 if (strcasecmp(DEBUG_MARKER, q) == 0) {
1039                         q = parse = missing_field(sob(++parse), errline);
1040                         parse = son(parse);
1041                         if (!*parse)
1042                                 warnx("debug line specifies no option:\n%s",
1043                                     errline);
1044                         else {
1045                                 *parse = '\0';
1046                                 parse_doption(q);
1047                         }
1048                         continue;
1049                 }
1050
1051                 special = 0;
1052                 working = init_entry(q, NULL);
1053                 if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1054                         special = 1;
1055                         if (defconf_p == NULL) {
1056                                 warnx("Ignoring entry for %s in %s!", q,
1057                                     cfname);
1058                                 free_entry(working);
1059                                 continue;
1060                         } else if (*defconf_p != NULL) {
1061                                 warnx("Ignoring duplicate entry for %s!", q);
1062                                 free_entry(working);
1063                                 continue;
1064                         }
1065                         *defconf_p = working;
1066                 }
1067
1068                 q = parse = missing_field(sob(++parse), errline);
1069                 parse = son(parse);
1070                 if (!*parse)
1071                         errx(1, "malformed line (missing fields):\n%s",
1072                             errline);
1073                 *parse = '\0';
1074                 if ((group = strchr(q, ':')) != NULL ||
1075                     (group = strrchr(q, '.')) != NULL) {
1076                         *group++ = '\0';
1077                         if (*q) {
1078                                 if (!(isnumberstr(q))) {
1079                                         if ((pwd = getpwnam(q)) == NULL)
1080                                                 errx(1,
1081                                      "error in config file; unknown user:\n%s",
1082                                                     errline);
1083                                         working->uid = pwd->pw_uid;
1084                                 } else
1085                                         working->uid = atoi(q);
1086                         } else
1087                                 working->uid = (uid_t)-1;
1088
1089                         q = group;
1090                         if (*q) {
1091                                 if (!(isnumberstr(q))) {
1092                                         if ((grp = getgrnam(q)) == NULL)
1093                                                 errx(1,
1094                                     "error in config file; unknown group:\n%s",
1095                                                     errline);
1096                                         working->gid = grp->gr_gid;
1097                                 } else
1098                                         working->gid = atoi(q);
1099                         } else
1100                                 working->gid = (gid_t)-1;
1101
1102                         q = parse = missing_field(sob(++parse), errline);
1103                         parse = son(parse);
1104                         if (!*parse)
1105                                 errx(1, "malformed line (missing fields):\n%s",
1106                                     errline);
1107                         *parse = '\0';
1108                 } else {
1109                         working->uid = (uid_t)-1;
1110                         working->gid = (gid_t)-1;
1111                 }
1112
1113                 if (!sscanf(q, "%o", &working->permissions))
1114                         errx(1, "error in config file; bad permissions:\n%s",
1115                             errline);
1116
1117                 q = parse = missing_field(sob(++parse), errline);
1118                 parse = son(parse);
1119                 if (!*parse)
1120                         errx(1, "malformed line (missing fields):\n%s",
1121                             errline);
1122                 *parse = '\0';
1123                 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1124                         errx(1, "error in config file; bad value for count of logs to save:\n%s",
1125                             errline);
1126
1127                 q = parse = missing_field(sob(++parse), errline);
1128                 parse = son(parse);
1129                 if (!*parse)
1130                         errx(1, "malformed line (missing fields):\n%s",
1131                             errline);
1132                 *parse = '\0';
1133                 if (isdigitch(*q))
1134                         working->trsize = atoi(q);
1135                 else if (strcmp(q, "*") == 0)
1136                         working->trsize = -1;
1137                 else {
1138                         warnx("Invalid value of '%s' for 'size' in line:\n%s",
1139                             q, errline);
1140                         working->trsize = -1;
1141                 }
1142
1143                 working->flags = 0;
1144                 q = parse = missing_field(sob(++parse), errline);
1145                 parse = son(parse);
1146                 eol = !*parse;
1147                 *parse = '\0';
1148                 {
1149                         char *ep;
1150                         u_long ul;
1151
1152                         ul = strtoul(q, &ep, 10);
1153                         if (ep == q)
1154                                 working->hours = 0;
1155                         else if (*ep == '*')
1156                                 working->hours = -1;
1157                         else if (ul > INT_MAX)
1158                                 errx(1, "interval is too large:\n%s", errline);
1159                         else
1160                                 working->hours = ul;
1161
1162                         if (*ep == '\0' || strcmp(ep, "*") == 0)
1163                                 goto no_trimat;
1164                         if (*ep != '@' && *ep != '$')
1165                                 errx(1, "malformed interval/at:\n%s", errline);
1166
1167                         working->flags |= CE_TRIMAT;
1168                         working->trim_at = ptime_init(NULL);
1169                         ptm_opts = PTM_PARSE_ISO8601;
1170                         if (*ep == '$')
1171                                 ptm_opts = PTM_PARSE_DWM;
1172                         ptm_opts |= PTM_PARSE_MATCHDOM;
1173                         res = ptime_relparse(working->trim_at, ptm_opts,
1174                             ptimeget_secs(timenow), ep + 1);
1175                         if (res == -2)
1176                                 errx(1, "nonexistent time for 'at' value:\n%s",
1177                                     errline);
1178                         else if (res < 0)
1179                                 errx(1, "malformed 'at' value:\n%s", errline);
1180                 }
1181 no_trimat:
1182
1183                 if (eol)
1184                         q = NULL;
1185                 else {
1186                         q = parse = sob(++parse);       /* Optional field */
1187                         parse = son(parse);
1188                         if (!*parse)
1189                                 eol = 1;
1190                         *parse = '\0';
1191                 }
1192
1193                 for (; q && *q && !isspacech(*q); q++) {
1194                         switch (tolowerch(*q)) {
1195                         case 'b':
1196                                 working->flags |= CE_BINARY;
1197                                 break;
1198                         case 'c':
1199                                 /*
1200                                  * XXX -        Ick! Ugly! Remove ASAP!
1201                                  * We want `c' and `C' for "create".  But we
1202                                  * will temporarily treat `c' as `g', because
1203                                  * FreeBSD releases <= 4.8 have a typo of
1204                                  * checking  ('G' || 'c')  for CE_GLOB.
1205                                  */
1206                                 if (*q == 'c') {
1207                                         warnx("Assuming 'g' for 'c' in flags for line:\n%s",
1208                                             errline);
1209                                         warnx("The 'c' flag will eventually mean 'CREATE'");
1210                                         working->flags |= CE_GLOB;
1211                                         break;
1212                                 }
1213                                 working->flags |= CE_CREATE;
1214                                 break;
1215                         case 'd':
1216                                 working->flags |= CE_NODUMP;
1217                                 break;
1218                         case 'g':
1219                                 working->flags |= CE_GLOB;
1220                                 break;
1221                         case 'j':
1222                                 working->flags |= CE_BZCOMPACT;
1223                                 break;
1224                         case 'n':
1225                                 working->flags |= CE_NOSIGNAL;
1226                                 break;
1227                         case 'u':
1228                                 working->flags |= CE_SIGNALGROUP;
1229                                 break;
1230                         case 'w':
1231                                 /* Depreciated flag - keep for compatibility purposes */
1232                                 break;
1233                         case 'z':
1234                                 working->flags |= CE_COMPACT;
1235                                 break;
1236                         case '-':
1237                                 break;
1238                         case 'f':       /* Used by OpenBSD for "CE_FOLLOW" */
1239                         case 'm':       /* Used by OpenBSD for "CE_MONITOR" */
1240                         case 'p':       /* Used by NetBSD  for "CE_PLAIN0" */
1241                         default:
1242                                 errx(1, "illegal flag in config file -- %c",
1243                                     *q);
1244                         }
1245                 }
1246
1247                 if (eol)
1248                         q = NULL;
1249                 else {
1250                         q = parse = sob(++parse);       /* Optional field */
1251                         parse = son(parse);
1252                         if (!*parse)
1253                                 eol = 1;
1254                         *parse = '\0';
1255                 }
1256
1257                 working->pid_file = NULL;
1258                 if (q && *q) {
1259                         if (*q == '/')
1260                                 working->pid_file = strdup(q);
1261                         else if (isdigit(*q))
1262                                 goto got_sig;
1263                         else
1264                                 errx(1,
1265                         "illegal pid file or signal number in config file:\n%s",
1266                                     errline);
1267                 }
1268                 if (eol)
1269                         q = NULL;
1270                 else {
1271                         q = parse = sob(++parse);       /* Optional field */
1272                         *(parse = son(parse)) = '\0';
1273                 }
1274
1275                 working->sig = SIGHUP;
1276                 if (q && *q) {
1277                         if (isdigit(*q)) {
1278                 got_sig:
1279                                 working->sig = atoi(q);
1280                         } else {
1281                 err_sig:
1282                                 errx(1,
1283                                     "illegal signal number in config file:\n%s",
1284                                     errline);
1285                         }
1286                         if (working->sig < 1 || working->sig >= NSIG)
1287                                 goto err_sig;
1288                 }
1289
1290                 /*
1291                  * Finish figuring out what pid-file to use (if any) in
1292                  * later processing if this logfile needs to be rotated.
1293                  */
1294                 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1295                         /*
1296                          * This config-entry specified 'n' for nosignal,
1297                          * see if it also specified an explicit pid_file.
1298                          * This would be a pretty pointless combination.
1299                          */
1300                         if (working->pid_file != NULL) {
1301                                 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1302                                     working->pid_file, errline);
1303                                 free(working->pid_file);
1304                                 working->pid_file = NULL;
1305                         }
1306                 } else if (working->pid_file == NULL) {
1307                         /*
1308                          * This entry did not specify the 'n' flag, which
1309                          * means it should signal syslogd unless it had
1310                          * specified some other pid-file (and obviously the
1311                          * syslog pid-file will not be for a process-group).
1312                          * Also, we should only try to notify syslog if we
1313                          * are root.
1314                          */
1315                         if (working->flags & CE_SIGNALGROUP) {
1316                                 warnx("Ignoring flag 'U' in line:\n%s",
1317                                     errline);
1318                                 working->flags &= ~CE_SIGNALGROUP;
1319                         }
1320                         if (needroot)
1321                                 working->pid_file = strdup(_PATH_SYSLOGPID);
1322                 }
1323
1324                 /*
1325                  * Add this entry to the appropriate list of entries, unless
1326                  * it was some kind of special entry (eg: <default>).
1327                  */
1328                 if (special) {
1329                         ;                       /* Do not add to any list */
1330                 } else if (working->flags & CE_GLOB) {
1331                         if (!*glob_p)
1332                                 *glob_p = working;
1333                         else
1334                                 lastglob->next = working;
1335                         lastglob = working;
1336                 } else {
1337                         if (!*work_p)
1338                                 *work_p = working;
1339                         else
1340                                 lastwork->next = working;
1341                         lastwork = working;
1342                 }
1343         }
1344         if (errline != NULL)
1345                 free(errline);
1346 }
1347
1348 static char *
1349 missing_field(char *p, char *errline)
1350 {
1351
1352         if (!p || !*p)
1353                 errx(1, "missing field in config file:\n%s", errline);
1354         return (p);
1355 }
1356
1357 static fk_entry
1358 do_rotate(const struct conf_entry *ent)
1359 {
1360         char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1361         char file1[MAXPATHLEN], file2[MAXPATHLEN];
1362         char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1363         char jfile1[MAXPATHLEN];
1364         int flags, numlogs_c;
1365         fk_entry free_or_keep;
1366         struct sigwork_entry *swork;
1367         struct stat st;
1368
1369         flags = ent->flags;
1370         free_or_keep = FREE_ENT;
1371
1372         if (archtodir) {
1373                 char *p;
1374
1375                 /* build complete name of archive directory into dirpart */
1376                 if (*archdirname == '/') {      /* absolute */
1377                         strlcpy(dirpart, archdirname, sizeof(dirpart));
1378                 } else {        /* relative */
1379                         /* get directory part of logfile */
1380                         strlcpy(dirpart, ent->log, sizeof(dirpart));
1381                         if ((p = rindex(dirpart, '/')) == NULL)
1382                                 dirpart[0] = '\0';
1383                         else
1384                                 *(p + 1) = '\0';
1385                         strlcat(dirpart, archdirname, sizeof(dirpart));
1386                 }
1387
1388                 /* check if archive directory exists, if not, create it */
1389                 if (lstat(dirpart, &st))
1390                         createdir(ent, dirpart);
1391
1392                 /* get filename part of logfile */
1393                 if ((p = rindex(ent->log, '/')) == NULL)
1394                         strlcpy(namepart, ent->log, sizeof(namepart));
1395                 else
1396                         strlcpy(namepart, p + 1, sizeof(namepart));
1397
1398                 /* name of oldest log */
1399                 (void) snprintf(file1, sizeof(file1), "%s/%s.%d", dirpart,
1400                     namepart, ent->numlogs);
1401                 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1402                     COMPRESS_POSTFIX);
1403                 snprintf(jfile1, sizeof(jfile1), "%s%s", file1,
1404                     BZCOMPRESS_POSTFIX);
1405         } else {
1406                 /* name of oldest log */
1407                 (void) snprintf(file1, sizeof(file1), "%s.%d", ent->log,
1408                     ent->numlogs);
1409                 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1410                     COMPRESS_POSTFIX);
1411                 snprintf(jfile1, sizeof(jfile1), "%s%s", file1,
1412                     BZCOMPRESS_POSTFIX);
1413         }
1414
1415         if (noaction) {
1416                 printf("\trm -f %s\n", file1);
1417                 printf("\trm -f %s\n", zfile1);
1418                 printf("\trm -f %s\n", jfile1);
1419         } else {
1420                 (void) unlink(file1);
1421                 (void) unlink(zfile1);
1422                 (void) unlink(jfile1);
1423         }
1424
1425         /* Move down log files */
1426         numlogs_c = ent->numlogs;               /* copy for countdown */
1427         while (numlogs_c--) {
1428
1429                 (void) strlcpy(file2, file1, sizeof(file2));
1430
1431                 if (archtodir)
1432                         (void) snprintf(file1, sizeof(file1), "%s/%s.%d",
1433                             dirpart, namepart, numlogs_c);
1434                 else
1435                         (void) snprintf(file1, sizeof(file1), "%s.%d",
1436                             ent->log, numlogs_c);
1437
1438                 (void) strlcpy(zfile1, file1, sizeof(zfile1));
1439                 (void) strlcpy(zfile2, file2, sizeof(zfile2));
1440                 if (lstat(file1, &st)) {
1441                         (void) strlcat(zfile1, COMPRESS_POSTFIX,
1442                             sizeof(zfile1));
1443                         (void) strlcat(zfile2, COMPRESS_POSTFIX,
1444                             sizeof(zfile2));
1445                         if (lstat(zfile1, &st)) {
1446                                 strlcpy(zfile1, file1, sizeof(zfile1));
1447                                 strlcpy(zfile2, file2, sizeof(zfile2));
1448                                 strlcat(zfile1, BZCOMPRESS_POSTFIX,
1449                                     sizeof(zfile1));
1450                                 strlcat(zfile2, BZCOMPRESS_POSTFIX,
1451                                     sizeof(zfile2));
1452                                 if (lstat(zfile1, &st))
1453                                         continue;
1454                         }
1455                 }
1456                 if (noaction)
1457                         printf("\tmv %s %s\n", zfile1, zfile2);
1458                 else {
1459                         /* XXX - Ought to be checking for failure! */
1460                         (void)rename(zfile1, zfile2);
1461                 }
1462                 change_attrs(zfile2, ent);
1463         }
1464
1465         if (ent->numlogs > 0) {
1466                 if (noaction) {
1467                         /*
1468                          * Note that savelog() may succeed with using link()
1469                          * for the archtodir case, but there is no good way
1470                          * of knowing if it will when doing "noaction", so
1471                          * here we claim that it will have to do a copy...
1472                          */
1473                         if (archtodir)
1474                                 printf("\tcp %s %s\n", ent->log, file1);
1475                         else
1476                                 printf("\tln %s %s\n", ent->log, file1);
1477                 } else {
1478                         if (!(flags & CE_BINARY)) {
1479                                 /* Report the trimming to the old log */
1480                                 log_trim(ent->log, ent);
1481                         }
1482                         savelog(ent->log, file1);
1483                 }
1484                 change_attrs(file1, ent);
1485         }
1486
1487         /* Create the new log file and move it into place */
1488         if (noaction)
1489                 printf("Start new log...\n");
1490         createlog(ent);
1491
1492         /*
1493          * Save all signalling and file-compression to be done after log
1494          * files from all entries have been rotated.  This way any one
1495          * process will not be sent the same signal multiple times when
1496          * multiple log files had to be rotated.
1497          */
1498         swork = NULL;
1499         if (ent->pid_file != NULL)
1500                 swork = save_sigwork(ent);
1501         if (ent->numlogs > 0 && (flags & (CE_COMPACT | CE_BZCOMPACT))) {
1502                 /*
1503                  * The zipwork_entry will include a pointer to this
1504                  * conf_entry, so the conf_entry should not be freed.
1505                  */
1506                 free_or_keep = KEEP_ENT;
1507                 save_zipwork(ent, swork, ent->fsize, file1);
1508         }
1509
1510         return (free_or_keep);
1511 }
1512
1513 static void
1514 do_sigwork(struct sigwork_entry *swork)
1515 {
1516         struct sigwork_entry *nextsig;
1517         int kres, secs;
1518
1519         if (!(swork->sw_pidok) || swork->sw_pid == 0)
1520                 return;                 /* no work to do... */
1521
1522         /*
1523          * If nosignal (-s) was specified, then do not signal any process.
1524          * Note that a nosignal request triggers a warning message if the
1525          * rotated logfile needs to be compressed, *unless* -R was also
1526          * specified.  We assume that an `-sR' request came from a process
1527          * which writes to the logfile, and as such, we assume that process
1528          * has already made sure the logfile is not presently in use.  This
1529          * just sets swork->sw_pidok to a special value, and do_zipwork
1530          * will print any necessary warning(s).
1531          */
1532         if (nosignal) {
1533                 if (!rotatereq)
1534                         swork->sw_pidok = -1;
1535                 return;
1536         }
1537
1538         /*
1539          * Compute the pause between consecutive signals.  Use a longer
1540          * sleep time if we will be sending two signals to the same
1541          * deamon or process-group.
1542          */
1543         secs = 0;
1544         nextsig = SLIST_NEXT(swork, sw_nextp);
1545         if (nextsig != NULL) {
1546                 if (swork->sw_pid == nextsig->sw_pid)
1547                         secs = 10;
1548                 else
1549                         secs = 1;
1550         }
1551
1552         if (noaction) {
1553                 printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1554                     (int)swork->sw_pid, swork->sw_fname);
1555                 if (secs > 0)
1556                         printf("\tsleep %d\n", secs);
1557                 return;
1558         }
1559
1560         kres = kill(swork->sw_pid, swork->sw_signum);
1561         if (kres != 0) {
1562                 /*
1563                  * Assume that "no such process" (ESRCH) is something
1564                  * to warn about, but is not an error.  Presumably the
1565                  * process which writes to the rotated log file(s) is
1566                  * gone, in which case we should have no problem with
1567                  * compressing the rotated log file(s).
1568                  */
1569                 if (errno != ESRCH)
1570                         swork->sw_pidok = 0;
1571                 warn("can't notify %s, pid %d", swork->sw_pidtype,
1572                     (int)swork->sw_pid);
1573         } else {
1574                 if (verbose)
1575                         printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
1576                             (int)swork->sw_pid, swork->sw_fname);
1577                 if (secs > 0) {
1578                         if (verbose)
1579                                 printf("Pause %d second(s) between signals\n",
1580                                     secs);
1581                         sleep(secs);
1582                 }
1583         }
1584 }
1585
1586 static void
1587 do_zipwork(struct zipwork_entry *zwork)
1588 {
1589         const char *pgm_name, *pgm_path;
1590         int errsav, fcount, zstatus;
1591         pid_t pidzip, wpid;
1592         char zresult[MAXPATHLEN];
1593
1594         pgm_path = NULL;
1595         strlcpy(zresult, zwork->zw_fname, sizeof(zresult));
1596         if (zwork != NULL && zwork->zw_conf != NULL) {
1597                 if (zwork->zw_conf->flags & CE_COMPACT) {
1598                         pgm_path = _PATH_GZIP;
1599                         strlcat(zresult, COMPRESS_POSTFIX, sizeof(zresult));
1600                 } else if (zwork->zw_conf->flags & CE_BZCOMPACT) {
1601                         pgm_path = _PATH_BZIP2;
1602                         strlcat(zresult, BZCOMPRESS_POSTFIX, sizeof(zresult));
1603                 }
1604         }
1605         if (pgm_path == NULL) {
1606                 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname);
1607                 return;
1608         }
1609         pgm_name = strrchr(pgm_path, '/');
1610         if (pgm_name == NULL)
1611                 pgm_name = pgm_path;
1612         else
1613                 pgm_name++;
1614
1615         if (zwork->zw_swork != NULL && zwork->zw_swork->sw_pidok <= 0) {
1616                 warnx(
1617                     "log %s not compressed because daemon(s) not notified",
1618                     zwork->zw_fname);
1619                 change_attrs(zwork->zw_fname, zwork->zw_conf);
1620                 return;
1621         }
1622
1623         if (noaction) {
1624                 printf("\t%s %s\n", pgm_name, zwork->zw_fname);
1625                 change_attrs(zresult, zwork->zw_conf);
1626                 return;
1627         }
1628
1629         fcount = 1;
1630         pidzip = fork();
1631         while (pidzip < 0) {
1632                 /*
1633                  * The fork failed.  If the failure was due to a temporary
1634                  * problem, then wait a short time and try it again.
1635                  */
1636                 errsav = errno;
1637                 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname);
1638                 if (errsav != EAGAIN || fcount > 5)
1639                         errx(1, "Exiting...");
1640                 sleep(fcount * 12);
1641                 fcount++;
1642                 pidzip = fork();
1643         }
1644         if (!pidzip) {
1645                 /* The child process executes the compression command */
1646                 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0);
1647                 err(1, "execl(`%s -f %s')", pgm_path, zwork->zw_fname);
1648         }
1649
1650         wpid = waitpid(pidzip, &zstatus, 0);
1651         if (wpid == -1) {
1652                 /* XXX - should this be a fatal error? */
1653                 warn("%s: waitpid(%d)", pgm_path, pidzip);
1654                 return;
1655         }
1656         if (!WIFEXITED(zstatus)) {
1657                 warnx("`%s -f %s' did not terminate normally", pgm_name,
1658                     zwork->zw_fname);
1659                 return;
1660         }
1661         if (WEXITSTATUS(zstatus)) {
1662                 warnx("`%s -f %s' terminated with a non-zero status (%d)",
1663                     pgm_name, zwork->zw_fname, WEXITSTATUS(zstatus));
1664                 return;
1665         }
1666
1667         /* Compression was successful, set file attributes on the result. */
1668         change_attrs(zresult, zwork->zw_conf);
1669 }
1670
1671 /*
1672  * Save information on any process we need to signal.  Any single
1673  * process may need to be sent different signal-values for different
1674  * log files, but usually a single signal-value will cause the process
1675  * to close and re-open all of it's log files.
1676  */
1677 static struct sigwork_entry *
1678 save_sigwork(const struct conf_entry *ent)
1679 {
1680         struct sigwork_entry *sprev, *stmp;
1681         int ndiff;
1682         size_t tmpsiz;
1683
1684         sprev = NULL;
1685         ndiff = 1;
1686         SLIST_FOREACH(stmp, &swhead, sw_nextp) {
1687                 ndiff = strcmp(ent->pid_file, stmp->sw_fname);
1688                 if (ndiff > 0)
1689                         break;
1690                 if (ndiff == 0) {
1691                         if (ent->sig == stmp->sw_signum)
1692                                 break;
1693                         if (ent->sig > stmp->sw_signum) {
1694                                 ndiff = 1;
1695                                 break;
1696                         }
1697                 }
1698                 sprev = stmp;
1699         }
1700         if (stmp != NULL && ndiff == 0)
1701                 return (stmp);
1702
1703         tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_file) + 1;
1704         stmp = malloc(tmpsiz);
1705         set_swpid(stmp, ent);
1706         stmp->sw_signum = ent->sig;
1707         strcpy(stmp->sw_fname, ent->pid_file);
1708         if (sprev == NULL)
1709                 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
1710         else
1711                 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
1712         return (stmp);
1713 }
1714
1715 /*
1716  * Save information on any file we need to compress.  We may see the same
1717  * file multiple times, so check the full list to avoid duplicates.  The
1718  * list itself is sorted smallest-to-largest, because that's the order we
1719  * want to compress the files.  If the partition is very low on disk space,
1720  * then the smallest files are the most likely to compress, and compressing
1721  * them first will free up more space for the larger files.
1722  */
1723 static struct zipwork_entry *
1724 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
1725     int zsize, const char *zipfname)
1726 {
1727         struct zipwork_entry *zprev, *ztmp;
1728         int ndiff;
1729         size_t tmpsiz;
1730
1731         /* Compute the size if the caller did not know it. */
1732         if (zsize < 0)
1733                 zsize = sizefile(zipfname);
1734
1735         zprev = NULL;
1736         ndiff = 1;
1737         SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
1738                 ndiff = strcmp(zipfname, ztmp->zw_fname);
1739                 if (ndiff == 0)
1740                         break;
1741                 if (zsize > ztmp->zw_fsize)
1742                         zprev = ztmp;
1743         }
1744         if (ztmp != NULL && ndiff == 0)
1745                 return (ztmp);
1746
1747         tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
1748         ztmp = malloc(tmpsiz);
1749         ztmp->zw_conf = ent;
1750         ztmp->zw_swork = swork;
1751         ztmp->zw_fsize = zsize;
1752         strcpy(ztmp->zw_fname, zipfname);
1753         if (zprev == NULL)
1754                 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
1755         else
1756                 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
1757         return (ztmp);
1758 }
1759
1760 /* Send a signal to the pid specified by pidfile */
1761 static void
1762 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
1763 {
1764         FILE *f;
1765         long minok, maxok, rval;
1766         char *endp, *linep, line[BUFSIZ];
1767
1768         minok = MIN_PID;
1769         maxok = MAX_PID;
1770         swork->sw_pidok = 0;
1771         swork->sw_pid = 0;
1772         swork->sw_pidtype = "daemon";
1773         if (ent->flags & CE_SIGNALGROUP) {
1774                 /*
1775                  * If we are expected to signal a process-group when
1776                  * rotating this logfile, then the value read in should
1777                  * be the negative of a valid process ID.
1778                  */
1779                 minok = -MAX_PID;
1780                 maxok = -MIN_PID;
1781                 swork->sw_pidtype = "process-group";
1782         }
1783
1784         f = fopen(ent->pid_file, "r");
1785         if (f == NULL) {
1786                 if (errno == ENOENT && enforcepid == 0) {
1787                         /*
1788                          * Warn if the PID file doesn't exist, but do
1789                          * not consider it an error.  Most likely it
1790                          * means the process has been terminated,
1791                          * so it should be safe to rotate any log
1792                          * files that the process would have been using.
1793                          */
1794                         swork->sw_pidok = 1;
1795                         warnx("pid file doesn't exist: %s", ent->pid_file);
1796                 } else
1797                         warn("can't open pid file: %s", ent->pid_file);
1798                 return;
1799         }
1800
1801         if (fgets(line, BUFSIZ, f) == NULL) {
1802                 /*
1803                  * Warn if the PID file is empty, but do not consider
1804                  * it an error.  Most likely it means the process has
1805                  * has terminated, so it should be safe to rotate any
1806                  * log files that the process would have been using.
1807                  */
1808                 if (feof(f) && enforcepid == 0) {
1809                         swork->sw_pidok = 1;
1810                         warnx("pid file is empty: %s", ent->pid_file);
1811                 } else
1812                         warn("can't read from pid file: %s", ent->pid_file);
1813                 (void)fclose(f);
1814                 return;
1815         }
1816         (void)fclose(f);
1817
1818         errno = 0;
1819         linep = line;
1820         while (*linep == ' ')
1821                 linep++;
1822         rval = strtol(linep, &endp, 10);
1823         if (*endp != '\0' && !isspacech(*endp)) {
1824                 warnx("pid file does not start with a valid number: %s",
1825                     ent->pid_file);
1826         } else if (rval < minok || rval > maxok) {
1827                 warnx("bad value '%ld' for process number in %s",
1828                     rval, ent->pid_file);
1829                 if (verbose)
1830                         warnx("\t(expecting value between %ld and %ld)",
1831                             minok, maxok);
1832         } else {
1833                 swork->sw_pidok = 1;
1834                 swork->sw_pid = rval;
1835         }
1836
1837         return;
1838 }
1839
1840 /* Log the fact that the logs were turned over */
1841 static int
1842 log_trim(const char *logname, const struct conf_entry *log_ent)
1843 {
1844         FILE *f;
1845         const char *xtra;
1846
1847         if ((f = fopen(logname, "a")) == NULL)
1848                 return (-1);
1849         xtra = "";
1850         if (log_ent->def_cfg)
1851                 xtra = " using <default> rule";
1852         if (log_ent->firstcreate)
1853                 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n",
1854                     daytime, hostname, (int) getpid(), xtra);
1855         else if (log_ent->r_reason != NULL)
1856                 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n",
1857                     daytime, hostname, (int) getpid(), log_ent->r_reason, xtra);
1858         else
1859                 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n",
1860                     daytime, hostname, (int) getpid(), xtra);
1861         if (fclose(f) == EOF)
1862                 err(1, "log_trim: fclose");
1863         return (0);
1864 }
1865
1866 /* Return size in kilobytes of a file */
1867 static int
1868 sizefile(const char *file)
1869 {
1870         struct stat sb;
1871
1872         if (stat(file, &sb) < 0)
1873                 return (-1);
1874         return (kbytes(dbtob(sb.st_blocks)));
1875 }
1876
1877 /* Return the age of old log file (file.0) */
1878 static int
1879 age_old_log(char *file)
1880 {
1881         struct stat sb;
1882         char *endp;
1883         char tmp[MAXPATHLEN + sizeof(".0") + sizeof(COMPRESS_POSTFIX) +
1884                 sizeof(BZCOMPRESS_POSTFIX) + 1];
1885
1886         if (archtodir) {
1887                 char *p;
1888
1889                 /* build name of archive directory into tmp */
1890                 if (*archdirname == '/') {      /* absolute */
1891                         strlcpy(tmp, archdirname, sizeof(tmp));
1892                 } else {        /* relative */
1893                         /* get directory part of logfile */
1894                         strlcpy(tmp, file, sizeof(tmp));
1895                         if ((p = rindex(tmp, '/')) == NULL)
1896                                 tmp[0] = '\0';
1897                         else
1898                                 *(p + 1) = '\0';
1899                         strlcat(tmp, archdirname, sizeof(tmp));
1900                 }
1901
1902                 strlcat(tmp, "/", sizeof(tmp));
1903
1904                 /* get filename part of logfile */
1905                 if ((p = rindex(file, '/')) == NULL)
1906                         strlcat(tmp, file, sizeof(tmp));
1907                 else
1908                         strlcat(tmp, p + 1, sizeof(tmp));
1909         } else {
1910                 (void) strlcpy(tmp, file, sizeof(tmp));
1911         }
1912
1913         strlcat(tmp, ".0", sizeof(tmp));
1914         if (stat(tmp, &sb) < 0) {
1915                 /*
1916                  * A plain '.0' file does not exist.  Try again, first
1917                  * with the added suffix of '.gz', then with an added
1918                  * suffix of '.bz2' instead of '.gz'.
1919                  */
1920                 endp = strchr(tmp, '\0');
1921                 strlcat(tmp, COMPRESS_POSTFIX, sizeof(tmp));
1922                 if (stat(tmp, &sb) < 0) {
1923                         *endp = '\0';           /* Remove .gz */
1924                         strlcat(tmp, BZCOMPRESS_POSTFIX, sizeof(tmp));
1925                         if (stat(tmp, &sb) < 0)
1926                                 return (-1);
1927                 }
1928         }
1929         return ((int)(ptimeget_secs(timenow) - sb.st_mtime + 1800) / 3600);
1930 }
1931
1932 /* Skip Over Blanks */
1933 static char *
1934 sob(char *p)
1935 {
1936         while (p && *p && isspace(*p))
1937                 p++;
1938         return (p);
1939 }
1940
1941 /* Skip Over Non-Blanks */
1942 static char *
1943 son(char *p)
1944 {
1945         while (p && *p && !isspace(*p))
1946                 p++;
1947         return (p);
1948 }
1949
1950 /* Check if string is actually a number */
1951 static int
1952 isnumberstr(const char *string)
1953 {
1954         while (*string) {
1955                 if (!isdigitch(*string++))
1956                         return (0);
1957         }
1958         return (1);
1959 }
1960
1961 /*
1962  * Save the active log file under a new name.  A link to the new name
1963  * is the quick-and-easy way to do this.  If that fails (which it will
1964  * if the destination is on another partition), then make a copy of
1965  * the file to the new location.
1966  */
1967 static void
1968 savelog(char *from, char *to)
1969 {
1970         FILE *src, *dst;
1971         int c, res;
1972
1973         res = link(from, to);
1974         if (res == 0)
1975                 return;
1976
1977         if ((src = fopen(from, "r")) == NULL)
1978                 err(1, "can't fopen %s for reading", from);
1979         if ((dst = fopen(to, "w")) == NULL)
1980                 err(1, "can't fopen %s for writing", to);
1981
1982         while ((c = getc(src)) != EOF) {
1983                 if ((putc(c, dst)) == EOF)
1984                         err(1, "error writing to %s", to);
1985         }
1986
1987         if (ferror(src))
1988                 err(1, "error reading from %s", from);
1989         if ((fclose(src)) != 0)
1990                 err(1, "can't fclose %s", to);
1991         if ((fclose(dst)) != 0)
1992                 err(1, "can't fclose %s", from);
1993 }
1994
1995 /* create one or more directory components of a path */
1996 static void
1997 createdir(const struct conf_entry *ent, char *dirpart)
1998 {
1999         int res;
2000         char *s, *d;
2001         char mkdirpath[MAXPATHLEN];
2002         struct stat st;
2003
2004         s = dirpart;
2005         d = mkdirpath;
2006
2007         for (;;) {
2008                 *d++ = *s++;
2009                 if (*s != '/' && *s != '\0')
2010                         continue;
2011                 *d = '\0';
2012                 res = lstat(mkdirpath, &st);
2013                 if (res != 0) {
2014                         if (noaction) {
2015                                 printf("\tmkdir %s\n", mkdirpath);
2016                         } else {
2017                                 res = mkdir(mkdirpath, 0755);
2018                                 if (res != 0)
2019                                         err(1, "Error on mkdir(\"%s\") for -a",
2020                                             mkdirpath);
2021                         }
2022                 }
2023                 if (*s == '\0')
2024                         break;
2025         }
2026         if (verbose) {
2027                 if (ent->firstcreate)
2028                         printf("Created directory '%s' for new %s\n",
2029                             dirpart, ent->log);
2030                 else
2031                         printf("Created directory '%s' for -a\n", dirpart);
2032         }
2033 }
2034
2035 /*
2036  * Create a new log file, destroying any currently-existing version
2037  * of the log file in the process.  If the caller wants a backup copy
2038  * of the file to exist, they should call 'link(logfile,logbackup)'
2039  * before calling this routine.
2040  */
2041 void
2042 createlog(const struct conf_entry *ent)
2043 {
2044         int fd, failed;
2045         struct stat st;
2046         char *realfile, *slash, tempfile[MAXPATHLEN];
2047
2048         fd = -1;
2049         realfile = ent->log;
2050
2051         /*
2052          * If this log file is being created for the first time (-C option),
2053          * then it may also be true that the parent directory does not exist
2054          * yet.  Check, and create that directory if it is missing.
2055          */
2056         if (ent->firstcreate) {
2057                 strlcpy(tempfile, realfile, sizeof(tempfile));
2058                 slash = strrchr(tempfile, '/');
2059                 if (slash != NULL) {
2060                         *slash = '\0';
2061                         failed = stat(tempfile, &st);
2062                         if (failed && errno != ENOENT)
2063                                 err(1, "Error on stat(%s)", tempfile);
2064                         if (failed)
2065                                 createdir(ent, tempfile);
2066                         else if (!S_ISDIR(st.st_mode))
2067                                 errx(1, "%s exists but is not a directory",
2068                                     tempfile);
2069                 }
2070         }
2071
2072         /*
2073          * First create an unused filename, so it can be chown'ed and
2074          * chmod'ed before it is moved into the real location.  mkstemp
2075          * will create the file mode=600 & owned by us.  Note that all
2076          * temp files will have a suffix of '.z<something>'.
2077          */
2078         strlcpy(tempfile, realfile, sizeof(tempfile));
2079         strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2080         if (noaction)
2081                 printf("\tmktemp %s\n", tempfile);
2082         else {
2083                 fd = mkstemp(tempfile);
2084                 if (fd < 0)
2085                         err(1, "can't mkstemp logfile %s", tempfile);
2086
2087                 /*
2088                  * Add status message to what will become the new log file.
2089                  */
2090                 if (!(ent->flags & CE_BINARY)) {
2091                         if (log_trim(tempfile, ent))
2092                                 err(1, "can't add status message to log");
2093                 }
2094         }
2095
2096         /* Change the owner/group, if we are supposed to */
2097         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2098                 if (noaction)
2099                         printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2100                             tempfile);
2101                 else {
2102                         failed = fchown(fd, ent->uid, ent->gid);
2103                         if (failed)
2104                                 err(1, "can't fchown temp file %s", tempfile);
2105                 }
2106         }
2107
2108         /* Turn on NODUMP if it was requested in the config-file. */
2109         if (ent->flags & CE_NODUMP) {
2110                 if (noaction)
2111                         printf("\tchflags nodump %s\n", tempfile);
2112                 else {
2113                         failed = fchflags(fd, UF_NODUMP);
2114                         if (failed) {
2115                                 warn("log_trim: fchflags(NODUMP)");
2116                         }
2117                 }
2118         }
2119
2120         /*
2121          * Note that if the real logfile still exists, and if the call
2122          * to rename() fails, then "neither the old file nor the new
2123          * file shall be changed or created" (to quote the standard).
2124          * If the call succeeds, then the file will be replaced without
2125          * any window where some other process might find that the file
2126          * did not exist.
2127          * XXX - ? It may be that for some error conditions, we could
2128          *      retry by first removing the realfile and then renaming.
2129          */
2130         if (noaction) {
2131                 printf("\tchmod %o %s\n", ent->permissions, tempfile);
2132                 printf("\tmv %s %s\n", tempfile, realfile);
2133         } else {
2134                 failed = fchmod(fd, ent->permissions);
2135                 if (failed)
2136                         err(1, "can't fchmod temp file '%s'", tempfile);
2137                 failed = rename(tempfile, realfile);
2138                 if (failed)
2139                         err(1, "can't mv %s to %s", tempfile, realfile);
2140         }
2141
2142         if (fd >= 0)
2143                 close(fd);
2144 }
2145
2146 /*
2147  * Change the attributes of a given filename to what was specified in
2148  * the newsyslog.conf entry.  This routine is only called for files
2149  * that newsyslog expects that it has created, and thus it is a fatal
2150  * error if this routine finds that the file does not exist.
2151  */
2152 static void
2153 change_attrs(const char *fname, const struct conf_entry *ent)
2154 {
2155         int failed;
2156
2157         if (noaction) {
2158                 printf("\tchmod %o %s\n", ent->permissions, fname);
2159
2160                 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2161                         printf("\tchown %u:%u %s\n",
2162                             ent->uid, ent->gid, fname);
2163
2164                 if (ent->flags & CE_NODUMP)
2165                         printf("\tchflags nodump %s\n", fname);
2166                 return;
2167         }
2168
2169         failed = chmod(fname, ent->permissions);
2170         if (failed) {
2171                 if (errno != EPERM)
2172                         err(1, "chmod(%s) in change_attrs", fname);
2173                 warn("change_attrs couldn't chmod(%s)", fname);
2174         }
2175
2176         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2177                 failed = chown(fname, ent->uid, ent->gid);
2178                 if (failed)
2179                         warn("can't chown %s", fname);
2180         }
2181
2182         if (ent->flags & CE_NODUMP) {
2183                 failed = chflags(fname, UF_NODUMP);
2184                 if (failed)
2185                         warn("can't chflags %s NODUMP", fname);
2186         }
2187 }