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
  61 #include <sys/param.h>
  62 #include <sys/queue.h>
  63 #include <sys/stat.h>
  64 #include <sys/wait.h>
  65
  66 #include <assert.h>
  67 #include <ctype.h>
  68 #include <err.h>
  69 #include <errno.h>
  70 #include <dirent.h>
  71 #include <fcntl.h>
  72 #include <fnmatch.h>
  73 #include <glob.h>
  74 #include <grp.h>
  75 #include <paths.h>
  76 #include <pwd.h>
  77 #include <signal.h>
  78 #include <stdio.h>
  79 #include <libgen.h>
  80 #include <stdlib.h>
  81 #include <string.h>
  82 #include <time.h>
  83 #include <unistd.h>
  84
  85 #include "pathnames.h"
  86 #include "extern.h"
  87
  88 /*
  89  * Compression suffixes
  90  */
  91 #ifndef COMPRESS_SUFFIX_GZ
  92 #define COMPRESS_SUFFIX_GZ      ".gz"
  93 #endif
  94
  95 #ifndef COMPRESS_SUFFIX_BZ2
  96 #define COMPRESS_SUFFIX_BZ2     ".bz2"
  97 #endif
  98
  99 #ifndef COMPRESS_SUFFIX_XZ
 100 #define COMPRESS_SUFFIX_XZ      ".xz"
 101 #endif
 102
 103 #define COMPRESS_SUFFIX_MAXLEN  MAX(MAX(sizeof(COMPRESS_SUFFIX_GZ),sizeof(COMPRESS_SUFFIX_BZ2)),sizeof(COMPRESS_SUFFIX_XZ))
 104
 105 /*
 106  * Compression types
 107  */
 108 #define COMPRESS_TYPES  4       /* Number of supported compression types */
 109
 110 #define COMPRESS_NONE   0
 111 #define COMPRESS_GZIP   1
 112 #define COMPRESS_BZIP2  2
 113 #define COMPRESS_XZ     3
 114
 115 /*
 116  * Bit-values for the 'flags' parsed from a config-file entry.
 117  */
 118 #define CE_BINARY       0x0008  /* Logfile is in binary, do not add status */
 119                                 /*    messages to logfile(s) when rotating. */
 120 #define CE_NOSIGNAL     0x0010  /* There is no process to signal when */
 121                                 /*    trimming this file. */
 122 #define CE_TRIMAT       0x0020  /* trim file at a specific time. */
 123 #define CE_GLOB         0x0040  /* name of the log is file name pattern. */
 124 #define CE_SIGNALGROUP  0x0080  /* Signal a process-group instead of a single */
 125                                 /*    process when trimming this file. */
 126 #define CE_CREATE       0x0100  /* Create the log file if it does not exist. */
 127 #define CE_NODUMP       0x0200  /* Set 'nodump' on newly created log file. */
 128 #define CE_PID2CMD      0x0400  /* Replace PID file with a shell command.*/
 129
 130 #define MIN_PID         5       /* Don't touch pids lower than this */
 131 #define MAX_PID         99999   /* was lower, see /usr/include/sys/proc.h */
 132
 133 #define kbytes(size)  (((size) + 1023) >> 10)
 134
 135 #define DEFAULT_MARKER  "<default>"
 136 #define DEBUG_MARKER    "<debug>"
 137 #define INCLUDE_MARKER  "<include>"
 138 #define DEFAULT_TIMEFNAME_FMT   "%Y%m%dT%H%M%S"
 139
 140 #define MAX_OLDLOGS 65536       /* Default maximum number of old logfiles */
 141
 142 struct compress_types {
 143         const char *flag;       /* Flag in configuration file */
 144         const char *suffix;     /* Compression suffix */
 145         const char *path;       /* Path to compression program */
 146 };
 147
 148 static const struct compress_types compress_type[COMPRESS_TYPES] = {
 149         { "", "", "" },                                 /* no compression */
 150         { "Z", COMPRESS_SUFFIX_GZ, _PATH_GZIP },        /* gzip compression */
 151         { "J", COMPRESS_SUFFIX_BZ2, _PATH_BZIP2 },      /* bzip2 compression */
 152         { "X", COMPRESS_SUFFIX_XZ, _PATH_XZ }           /* xz compression */
 153 };
 154
 155 struct conf_entry {
 156         STAILQ_ENTRY(conf_entry) cf_nextp;
 157         char *log;              /* Name of the log */
 158         char *pid_cmd_file;             /* PID or command file */
 159         char *r_reason;         /* The reason this file is being rotated */
 160         int firstcreate;        /* Creating log for the first time (-C). */
 161         int rotate;             /* Non-zero if this file should be rotated */
 162         int fsize;              /* size found for the log file */
 163         uid_t uid;              /* Owner of log */
 164         gid_t gid;              /* Group of log */
 165         int numlogs;            /* Number of logs to keep */
 166         int trsize;             /* Size cutoff to trigger trimming the log */
 167         int hours;              /* Hours between log trimming */
 168         struct ptime_data *trim_at;     /* Specific time to do trimming */
 169         unsigned int permissions;       /* File permissions on the log */
 170         int flags;              /* CE_BINARY */
 171         int compress;           /* Compression */
 172         int sig;                /* Signal to send */
 173         int def_cfg;            /* Using the <default> rule for this file */
 174 };
 175
 176 struct sigwork_entry {
 177         SLIST_ENTRY(sigwork_entry) sw_nextp;
 178         int      sw_signum;             /* the signal to send */
 179         int      sw_pidok;              /* true if pid value is valid */
 180         pid_t    sw_pid;                /* the process id from the PID file */
 181         const char *sw_pidtype;         /* "daemon" or "process group" */
 182         int      sw_runcmd;             /* run command or send PID to signal */
 183         char     sw_fname[1];           /* file the PID was read from or shell cmd */
 184 };
 185
 186 struct zipwork_entry {
 187         SLIST_ENTRY(zipwork_entry) zw_nextp;
 188         const struct conf_entry *zw_conf;       /* for chown/perm/flag info */
 189         const struct sigwork_entry *zw_swork;   /* to know success of signal */
 190         int      zw_fsize;              /* size of the file to compress */
 191         char     zw_fname[1];           /* the file to compress */
 192 };
 193
 194 struct include_entry {
 195         STAILQ_ENTRY(include_entry) inc_nextp;
 196         const char *file;       /* Name of file to process */
 197 };
 198
 199 struct oldlog_entry {
 200         char *fname;            /* Filename of the log file */
 201         time_t t;               /* Parsed timestamp of the logfile */
 202 };
 203
 204 typedef enum {
 205         FREE_ENT, KEEP_ENT
 206 }       fk_entry;
 207
 208 STAILQ_HEAD(cflist, conf_entry);
 209 static SLIST_HEAD(swlisthead, sigwork_entry) swhead =
 210     SLIST_HEAD_INITIALIZER(swhead);
 211 static SLIST_HEAD(zwlisthead, zipwork_entry) zwhead =
 212     SLIST_HEAD_INITIALIZER(zwhead);
 213 STAILQ_HEAD(ilist, include_entry);
 214
 215 int dbg_at_times;               /* -D Show details of 'trim_at' code */
 216
 217 static int archtodir = 0;       /* Archive old logfiles to other directory */
 218 static int createlogs;          /* Create (non-GLOB) logfiles which do not */
 219                                 /*    already exist.  1=='for entries with */
 220                                 /*    C flag', 2=='for all entries'. */
 221 int verbose = 0;                /* Print out what's going on */
 222 static int needroot = 1;        /* Root privs are necessary */
 223 int noaction = 0;               /* Don't do anything, just show it */
 224 static int norotate = 0;        /* Don't rotate */
 225 static int nosignal;            /* Do not send any signals */
 226 static int enforcepid = 0;      /* If PID file does not exist or empty, do nothing */
 227 static int force = 0;           /* Force the trim no matter what */
 228 static int rotatereq = 0;       /* -R = Always rotate the file(s) as given */
 229                                 /*    on the command (this also requires   */
 230                                 /*    that a list of files *are* given on  */
 231                                 /*    the run command). */
 232 static char *requestor;         /* The name given on a -R request */
 233 static char *timefnamefmt = NULL;/* Use time based filenames instead of .0 */
 234 static char *archdirname;       /* Directory path to old logfiles archive */
 235 static char *destdir = NULL;    /* Directory to treat at root for logs */
 236 static const char *conf;        /* Configuration file to use */
 237
 238 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */
 239 static struct ptime_data *timenow; /* The time to use for checking at-fields */
 240
 241 #define DAYTIME_LEN     16
 242 static char daytime[DAYTIME_LEN];/* The current time in human readable form,
 243                                   * used for rotation-tracking messages. */
 244 static char hostname[MAXHOSTNAMELEN]; /* hostname */
 245
 246 static const char *path_syslogpid = _PATH_SYSLOGPID;
 247
 248 static struct cflist *get_worklist(char **files);
 249 static void parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
 250                     struct conf_entry *defconf_p, struct ilist *inclist);
 251 static void add_to_queue(const char *fname, struct ilist *inclist);
 252 static char *sob(char *p);
 253 static char *son(char *p);
 254 static int isnumberstr(const char *);
 255 static int isglobstr(const char *);
 256 static char *missing_field(char *p, char *errline);
 257 static void      change_attrs(const char *, const struct conf_entry *);
 258 static const char *get_logfile_suffix(const char *logfile);
 259 static fk_entry  do_entry(struct conf_entry *);
 260 static fk_entry  do_rotate(const struct conf_entry *);
 261 static void      do_sigwork(struct sigwork_entry *);
 262 static void      do_zipwork(struct zipwork_entry *);
 263 static struct sigwork_entry *
 264                  save_sigwork(const struct conf_entry *);
 265 static struct zipwork_entry *
 266                  save_zipwork(const struct conf_entry *, const struct
 267                     sigwork_entry *, int, const char *);
 268 static void      set_swpid(struct sigwork_entry *, const struct conf_entry *);
 269 static int       sizefile(const char *);
 270 static void expand_globs(struct cflist *work_p, struct cflist *glob_p);
 271 static void free_clist(struct cflist *list);
 272 static void free_entry(struct conf_entry *ent);
 273 static struct conf_entry *init_entry(const char *fname,
 274                 struct conf_entry *src_entry);
 275 static void parse_args(int argc, char **argv);
 276 static int parse_doption(const char *doption);
 277 static void usage(void);
 278 static int log_trim(const char *logname, const struct conf_entry *log_ent);
 279 static int age_old_log(const char *file);
 280 static void savelog(char *from, char *to);
 281 static void createdir(const struct conf_entry *ent, char *dirpart);
 282 static void createlog(const struct conf_entry *ent);
 283 static int parse_signal(const char *str);
 284
 285 /*
 286  * All the following take a parameter of 'int', but expect values in the
 287  * range of unsigned char.  Define wrappers which take values of type 'char',
 288  * whether signed or unsigned, and ensure they end up in the right range.
 289  */
 290 #define isdigitch(Anychar) isdigit((u_char)(Anychar))
 291 #define isprintch(Anychar) isprint((u_char)(Anychar))
 292 #define isspacech(Anychar) isspace((u_char)(Anychar))
 293 #define tolowerch(Anychar) tolower((u_char)(Anychar))
 294
 295 int
 296 main(int argc, char **argv)
 297 {
 298         struct cflist *worklist;
 299         struct conf_entry *p;
 300         struct sigwork_entry *stmp;
 301         struct zipwork_entry *ztmp;
 302
 303         SLIST_INIT(&swhead);
 304         SLIST_INIT(&zwhead);
 305
 306         parse_args(argc, argv);
 307         argc -= optind;
 308         argv += optind;
 309
 310         if (needroot && getuid() && geteuid())
 311                 errx(1, "must have root privs");
 312         worklist = get_worklist(argv);
 313
 314         /*
 315          * Rotate all the files which need to be rotated.  Note that
 316          * some users have *hundreds* of entries in newsyslog.conf!
 317          */
 318         while (!STAILQ_EMPTY(worklist)) {
 319                 p = STAILQ_FIRST(worklist);
 320                 STAILQ_REMOVE_HEAD(worklist, cf_nextp);
 321                 if (do_entry(p) == FREE_ENT)
 322                         free_entry(p);
 323         }
 324
 325         /*
 326          * Send signals to any processes which need a signal to tell
 327          * them to close and re-open the log file(s) we have rotated.
 328          * Note that zipwork_entries include pointers to these
 329          * sigwork_entry's, so we can not free the entries here.
 330          */
 331         if (!SLIST_EMPTY(&swhead)) {
 332                 if (noaction || verbose)
 333                         printf("Signal all daemon process(es)...\n");
 334                 SLIST_FOREACH(stmp, &swhead, sw_nextp)
 335                         do_sigwork(stmp);
 336                 if (noaction)
 337                         printf("\tsleep 10\n");
 338                 else {
 339                         if (verbose)
 340                                 printf("Pause 10 seconds to allow daemon(s)"
 341                                     " to close log file(s)\n");
 342                         sleep(10);
 343                 }
 344         }
 345         /*
 346          * Compress all files that we're expected to compress, now
 347          * that all processes should have closed the files which
 348          * have been rotated.
 349          */
 350         if (!SLIST_EMPTY(&zwhead)) {
 351                 if (noaction || verbose)
 352                         printf("Compress all rotated log file(s)...\n");
 353                 while (!SLIST_EMPTY(&zwhead)) {
 354                         ztmp = SLIST_FIRST(&zwhead);
 355                         do_zipwork(ztmp);
 356                         SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
 357                         free(ztmp);
 358                 }
 359         }
 360         /* Now free all the sigwork entries. */
 361         while (!SLIST_EMPTY(&swhead)) {
 362                 stmp = SLIST_FIRST(&swhead);
 363                 SLIST_REMOVE_HEAD(&swhead, sw_nextp);
 364                 free(stmp);
 365         }
 366
 367         while (wait(NULL) > 0 || errno == EINTR)
 368                 ;
 369         return (0);
 370 }
 371
 372 static struct conf_entry *
 373 init_entry(const char *fname, struct conf_entry *src_entry)
 374 {
 375         struct conf_entry *tempwork;
 376
 377         if (verbose > 4)
 378                 printf("\t--> [creating entry for %s]\n", fname);
 379
 380         tempwork = malloc(sizeof(struct conf_entry));
 381         if (tempwork == NULL)
 382                 err(1, "malloc of conf_entry for %s", fname);
 383
 384         if (destdir == NULL || fname[0] != '/')
 385                 tempwork->log = strdup(fname);
 386         else
 387                 asprintf(&tempwork->log, "%s%s", destdir, fname);
 388         if (tempwork->log == NULL)
 389                 err(1, "strdup for %s", fname);
 390
 391         if (src_entry != NULL) {
 392                 tempwork->pid_cmd_file = NULL;
 393                 if (src_entry->pid_cmd_file)
 394                         tempwork->pid_cmd_file = strdup(src_entry->pid_cmd_file);
 395                 tempwork->r_reason = NULL;
 396                 tempwork->firstcreate = 0;
 397                 tempwork->rotate = 0;
 398                 tempwork->fsize = -1;
 399                 tempwork->uid = src_entry->uid;
 400                 tempwork->gid = src_entry->gid;
 401                 tempwork->numlogs = src_entry->numlogs;
 402                 tempwork->trsize = src_entry->trsize;
 403                 tempwork->hours = src_entry->hours;
 404                 tempwork->trim_at = NULL;
 405                 if (src_entry->trim_at != NULL)
 406                         tempwork->trim_at = ptime_init(src_entry->trim_at);
 407                 tempwork->permissions = src_entry->permissions;
 408                 tempwork->flags = src_entry->flags;
 409                 tempwork->compress = src_entry->compress;
 410                 tempwork->sig = src_entry->sig;
 411                 tempwork->def_cfg = src_entry->def_cfg;
 412         } else {
 413                 /* Initialize as a "do-nothing" entry */
 414                 tempwork->pid_cmd_file = NULL;
 415                 tempwork->r_reason = NULL;
 416                 tempwork->firstcreate = 0;
 417                 tempwork->rotate = 0;
 418                 tempwork->fsize = -1;
 419                 tempwork->uid = (uid_t)-1;
 420                 tempwork->gid = (gid_t)-1;
 421                 tempwork->numlogs = 1;
 422                 tempwork->trsize = -1;
 423                 tempwork->hours = -1;
 424                 tempwork->trim_at = NULL;
 425                 tempwork->permissions = 0;
 426                 tempwork->flags = 0;
 427                 tempwork->compress = COMPRESS_NONE;
 428                 tempwork->sig = SIGHUP;
 429                 tempwork->def_cfg = 0;
 430         }
 431
 432         return (tempwork);
 433 }
 434
 435 static void
 436 free_entry(struct conf_entry *ent)
 437 {
 438
 439         if (ent == NULL)
 440                 return;
 441
 442         if (ent->log != NULL) {
 443                 if (verbose > 4)
 444                         printf("\t--> [freeing entry for %s]\n", ent->log);
 445                 free(ent->log);
 446                 ent->log = NULL;
 447         }
 448
 449         if (ent->pid_cmd_file != NULL) {
 450                 free(ent->pid_cmd_file);
 451                 ent->pid_cmd_file = NULL;
 452         }
 453
 454         if (ent->r_reason != NULL) {
 455                 free(ent->r_reason);
 456                 ent->r_reason = NULL;
 457         }
 458
 459         if (ent->trim_at != NULL) {
 460                 ptime_free(ent->trim_at);
 461                 ent->trim_at = NULL;
 462         }
 463
 464         free(ent);
 465 }
 466
 467 static void
 468 free_clist(struct cflist *list)
 469 {
 470         struct conf_entry *ent;
 471
 472         while (!STAILQ_EMPTY(list)) {
 473                 ent = STAILQ_FIRST(list);
 474                 STAILQ_REMOVE_HEAD(list, cf_nextp);
 475                 free_entry(ent);
 476         }
 477
 478         free(list);
 479         list = NULL;
 480 }
 481
 482 static fk_entry
 483 do_entry(struct conf_entry * ent)
 484 {
 485 #define REASON_MAX      80
 486         int modtime;
 487         fk_entry free_or_keep;
 488         double diffsecs;
 489         char temp_reason[REASON_MAX];
 490         int oversized;
 491
 492         free_or_keep = FREE_ENT;
 493         if (verbose)
 494                 printf("%s <%d%s>: ", ent->log, ent->numlogs,
 495                     compress_type[ent->compress].flag);
 496         ent->fsize = sizefile(ent->log);
 497         oversized = ((ent->trsize > 0) && (ent->fsize >= ent->trsize));
 498         modtime = age_old_log(ent->log);
 499         ent->rotate = 0;
 500         ent->firstcreate = 0;
 501         if (ent->fsize < 0) {
 502                 /*
 503                  * If either the C flag or the -C option was specified,
 504                  * and if we won't be creating the file, then have the
 505                  * verbose message include a hint as to why the file
 506                  * will not be created.
 507                  */
 508                 temp_reason[0] = '\0';
 509                 if (createlogs > 1)
 510                         ent->firstcreate = 1;
 511                 else if ((ent->flags & CE_CREATE) && createlogs)
 512                         ent->firstcreate = 1;
 513                 else if (ent->flags & CE_CREATE)
 514                         strlcpy(temp_reason, " (no -C option)", REASON_MAX);
 515                 else if (createlogs)
 516                         strlcpy(temp_reason, " (no C flag)", REASON_MAX);
 517
 518                 if (ent->firstcreate) {
 519                         if (verbose)
 520                                 printf("does not exist -> will create.\n");
 521                         createlog(ent);
 522                 } else if (verbose) {
 523                         printf("does not exist, skipped%s.\n", temp_reason);
 524                 }
 525         } else {
 526                 if (ent->flags & CE_TRIMAT && !force && !rotatereq &&
 527                     !oversized) {
 528                         diffsecs = ptimeget_diff(timenow, ent->trim_at);
 529                         if (diffsecs < 0.0) {
 530                                 /* trim_at is some time in the future. */
 531                                 if (verbose) {
 532                                         ptime_adjust4dst(ent->trim_at,
 533                                             timenow);
 534                                         printf("--> will trim at %s",
 535                                             ptimeget_ctime(ent->trim_at));
 536                                 }
 537                                 return (free_or_keep);
 538                         } else if (diffsecs >= 3600.0) {
 539                                 /*
 540                                  * trim_at is more than an hour in the past,
 541                                  * so find the next valid trim_at time, and
 542                                  * tell the user what that will be.
 543                                  */
 544                                 if (verbose && dbg_at_times)
 545                                         printf("\n\t--> prev trim at %s\t",
 546                                             ptimeget_ctime(ent->trim_at));
 547                                 if (verbose) {
 548                                         ptimeset_nxtime(ent->trim_at);
 549                                         printf("--> will trim at %s",
 550                                             ptimeget_ctime(ent->trim_at));
 551                                 }
 552                                 return (free_or_keep);
 553                         } else if (verbose && noaction && dbg_at_times) {
 554                                 /*
 555                                  * If we are just debugging at-times, then
 556                                  * a detailed message is helpful.  Also
 557                                  * skip "doing" any commands, since they
 558                                  * would all be turned off by no-action.
 559                                  */
 560                                 printf("\n\t--> timematch at %s",
 561                                     ptimeget_ctime(ent->trim_at));
 562                                 return (free_or_keep);
 563                         } else if (verbose && ent->hours <= 0) {
 564                                 printf("--> time is up\n");
 565                         }
 566                 }
 567                 if (verbose && (ent->trsize > 0))
 568                         printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
 569                 if (verbose && (ent->hours > 0))
 570                         printf(" age (hr): %d [%d] ", modtime, ent->hours);
 571
 572                 /*
 573                  * Figure out if this logfile needs to be rotated.
 574                  */
 575                 temp_reason[0] = '\0';
 576                 if (rotatereq) {
 577                         ent->rotate = 1;
 578                         snprintf(temp_reason, REASON_MAX, " due to -R from %s",
 579                             requestor);
 580                 } else if (force) {
 581                         ent->rotate = 1;
 582                         snprintf(temp_reason, REASON_MAX, " due to -F request");
 583                 } else if (oversized) {
 584                         ent->rotate = 1;
 585                         snprintf(temp_reason, REASON_MAX, " due to size>%dK",
 586                             ent->trsize);
 587                 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
 588                         ent->rotate = 1;
 589                 } else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
 590                     (modtime < 0))) {
 591                         ent->rotate = 1;
 592                 }
 593
 594                 /*
 595                  * If the file needs to be rotated, then rotate it.
 596                  */
 597                 if (ent->rotate && !norotate) {
 598                         if (temp_reason[0] != '\0')
 599                                 ent->r_reason = strdup(temp_reason);
 600                         if (verbose)
 601                                 printf("--> trimming log....\n");
 602                         if (noaction && !verbose)
 603                                 printf("%s <%d%s>: trimming\n", ent->log,
 604                                     ent->numlogs,
 605                                     compress_type[ent->compress].flag);
 606                         free_or_keep = do_rotate(ent);
 607                 } else {
 608                         if (verbose)
 609                                 printf("--> skipping\n");
 610                 }
 611         }
 612         return (free_or_keep);
 613 #undef REASON_MAX
 614 }
 615
 616 static void
 617 parse_args(int argc, char **argv)
 618 {
 619         int ch;
 620         char *p;
 621
 622         timenow = ptime_init(NULL);
 623         ptimeset_time(timenow, time(NULL));
 624         strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN);
 625
 626         /* Let's get our hostname */
 627         (void)gethostname(hostname, sizeof(hostname));
 628
 629         /* Truncate domain */
 630         if ((p = strchr(hostname, '.')) != NULL)
 631                 *p = '\0';
 632
 633         /* Parse command line options. */
 634         while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1)
 635                 switch (ch) {
 636                 case 'a':
 637                         archtodir++;
 638                         archdirname = optarg;
 639                         break;
 640                 case 'd':
 641                         destdir = optarg;
 642                         break;
 643                 case 'f':
 644                         conf = optarg;
 645                         break;
 646                 case 'n':
 647                         noaction++;
 648                         /* FALLTHROUGH */
 649                 case 'r':
 650                         needroot = 0;
 651                         break;
 652                 case 's':
 653                         nosignal = 1;
 654                         break;
 655                 case 't':
 656                         if (optarg[0] == '\0' ||
 657                             strcmp(optarg, "DEFAULT") == 0)
 658                                 timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT);
 659                         else
 660                                 timefnamefmt = strdup(optarg);
 661                         break;
 662                 case 'v':
 663                         verbose++;
 664                         break;
 665                 case 'C':
 666                         /* Useful for things like rc.diskless... */
 667                         createlogs++;
 668                         break;
 669                 case 'D':
 670                         /*
 671                          * Set some debugging option.  The specific option
 672                          * depends on the value of optarg.  These options
 673                          * may come and go without notice or documentation.
 674                          */
 675                         if (parse_doption(optarg))
 676                                 break;
 677                         usage();
 678                         /* NOTREACHED */
 679                 case 'F':
 680                         force++;
 681                         break;
 682                 case 'N':
 683                         norotate++;
 684                         break;
 685                 case 'P':
 686                         enforcepid++;
 687                         break;
 688                 case 'R':
 689                         rotatereq++;
 690                         requestor = strdup(optarg);
 691                         break;
 692                 case 'S':
 693                         path_syslogpid = optarg;
 694                         break;
 695                 case 'm':       /* Used by OpenBSD for "monitor mode" */
 696                 default:
 697                         usage();
 698                         /* NOTREACHED */
 699                 }
 700
 701         if (force && norotate) {
 702                 warnx("Only one of -F and -N may be specified.");
 703                 usage();
 704                 /* NOTREACHED */
 705         }
 706
 707         if (rotatereq) {
 708                 if (optind == argc) {
 709                         warnx("At least one filename must be given when -R is specified.");
 710                         usage();
 711                         /* NOTREACHED */
 712                 }
 713                 /* Make sure "requestor" value is safe for a syslog message. */
 714                 for (p = requestor; *p != '\0'; p++) {
 715                         if (!isprintch(*p) && (*p != '\t'))
 716                                 *p = '.';
 717                 }
 718         }
 719
 720         if (dbg_timenow) {
 721                 /*
 722                  * Note that the 'daytime' variable is not changed.
 723                  * That is only used in messages that track when a
 724                  * logfile is rotated, and if a file *is* rotated,
 725                  * then it will still rotated at the "real now" time.
 726                  */
 727                 ptime_free(timenow);
 728                 timenow = dbg_timenow;
 729                 fprintf(stderr, "Debug: Running as if TimeNow is %s",
 730                     ptimeget_ctime(dbg_timenow));
 731         }
 732
 733 }
 734
 735 /*
 736  * These debugging options are mainly meant for developer use, such
 737  * as writing regression-tests.  They would not be needed by users
 738  * during normal operation of newsyslog...
 739  */
 740 static int
 741 parse_doption(const char *doption)
 742 {
 743         const char TN[] = "TN=";
 744         int res;
 745
 746         if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
 747                 /*
 748                  * The "TimeNow" debugging option.  This might be off
 749                  * by an hour when crossing a timezone change.
 750                  */
 751                 dbg_timenow = ptime_init(NULL);
 752                 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
 753                     time(NULL), doption + sizeof(TN) - 1);
 754                 if (res == -2) {
 755                         warnx("Non-existent time specified on -D %s", doption);
 756                         return (0);                     /* failure */
 757                 } else if (res < 0) {
 758                         warnx("Malformed time given on -D %s", doption);
 759                         return (0);                     /* failure */
 760                 }
 761                 return (1);                     /* successfully parsed */
 762
 763         }
 764
 765         if (strcmp(doption, "ats") == 0) {
 766                 dbg_at_times++;
 767                 return (1);                     /* successfully parsed */
 768         }
 769
 770         /* XXX - This check could probably be dropped. */
 771         if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder")
 772             == 0)) {
 773                 warnx("NOTE: newsyslog always uses 'neworder'.");
 774                 return (1);                     /* successfully parsed */
 775         }
 776
 777         warnx("Unknown -D (debug) option: '%s'", doption);
 778         return (0);                             /* failure */
 779 }
 780
 781 static void
 782 usage(void)
 783 {
 784
 785         fprintf(stderr,
 786             "usage: newsyslog [-CFNPnrsv] [-a directory] [-d directory] [-f config_file]\n"
 787             "                 [-S pidfile] [-t timefmt] [[-R tagname] file ...]\n");
 788         exit(1);
 789 }
 790
 791 /*
 792  * Parse a configuration file and return a linked list of all the logs
 793  * which should be processed.
 794  */
 795 static struct cflist *
 796 get_worklist(char **files)
 797 {
 798         FILE *f;
 799         char **given;
 800         struct cflist *cmdlist, *filelist, *globlist;
 801         struct conf_entry *defconf, *dupent, *ent;
 802         struct ilist inclist;
 803         struct include_entry *inc;
 804         int gmatch, fnres;
 805
 806         defconf = NULL;
 807         STAILQ_INIT(&inclist);
 808
 809         filelist = malloc(sizeof(struct cflist));
 810         if (filelist == NULL)
 811                 err(1, "malloc of filelist");
 812         STAILQ_INIT(filelist);
 813         globlist = malloc(sizeof(struct cflist));
 814         if (globlist == NULL)
 815                 err(1, "malloc of globlist");
 816         STAILQ_INIT(globlist);
 817
 818         inc = malloc(sizeof(struct include_entry));
 819         if (inc == NULL)
 820                 err(1, "malloc of inc");
 821         inc->file = conf;
 822         if (inc->file == NULL)
 823                 inc->file = _PATH_CONF;
 824         STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp);
 825
 826         STAILQ_FOREACH(inc, &inclist, inc_nextp) {
 827                 if (strcmp(inc->file, "-") != 0)
 828                         f = fopen(inc->file, "r");
 829                 else {
 830                         f = stdin;
 831                         inc->file = "<stdin>";
 832                 }
 833                 if (!f)
 834                         err(1, "%s", inc->file);
 835
 836                 if (verbose)
 837                         printf("Processing %s\n", inc->file);
 838                 parse_file(f, filelist, globlist, defconf, &inclist);
 839                 (void) fclose(f);
 840         }
 841
 842         /*
 843          * All config-file information has been read in and turned into
 844          * a filelist and a globlist.  If there were no specific files
 845          * given on the run command, then the only thing left to do is to
 846          * call a routine which finds all files matched by the globlist
 847          * and adds them to the filelist.  Then return the worklist.
 848          */
 849         if (*files == NULL) {
 850                 expand_globs(filelist, globlist);
 851                 free_clist(globlist);
 852                 if (defconf != NULL)
 853                         free_entry(defconf);
 854                 return (filelist);
 855                 /* NOTREACHED */
 856         }
 857
 858         /*
 859          * If newsyslog was given a specific list of files to process,
 860          * it may be that some of those files were not listed in any
 861          * config file.  Those unlisted files should get the default
 862          * rotation action.  First, create the default-rotation action
 863          * if none was found in a system config file.
 864          */
 865         if (defconf == NULL) {
 866                 defconf = init_entry(DEFAULT_MARKER, NULL);
 867                 defconf->numlogs = 3;
 868                 defconf->trsize = 50;
 869                 defconf->permissions = S_IRUSR|S_IWUSR;
 870         }
 871
 872         /*
 873          * If newsyslog was run with a list of specific filenames,
 874          * then create a new worklist which has only those files in
 875          * it, picking up the rotation-rules for those files from
 876          * the original filelist.
 877          *
 878          * XXX - Note that this will copy multiple rules for a single
 879          *      logfile, if multiple entries are an exact match for
 880          *      that file.  That matches the historic behavior, but do
 881          *      we want to continue to allow it?  If so, it should
 882          *      probably be handled more intelligently.
 883          */
 884         cmdlist = malloc(sizeof(struct cflist));
 885         if (cmdlist == NULL)
 886                 err(1, "malloc of cmdlist");
 887         STAILQ_INIT(cmdlist);
 888
 889         for (given = files; *given; ++given) {
 890                 /*
 891                  * First try to find exact-matches for this given file.
 892                  */
 893                 gmatch = 0;
 894                 STAILQ_FOREACH(ent, filelist, cf_nextp) {
 895                         if (strcmp(ent->log, *given) == 0) {
 896                                 gmatch++;
 897                                 dupent = init_entry(*given, ent);
 898                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 899                         }
 900                 }
 901                 if (gmatch) {
 902                         if (verbose > 2)
 903                                 printf("\t+ Matched entry %s\n", *given);
 904                         continue;
 905                 }
 906
 907                 /*
 908                  * There was no exact-match for this given file, so look
 909                  * for a "glob" entry which does match.
 910                  */
 911                 gmatch = 0;
 912                 if (verbose > 2 && globlist != NULL)
 913                         printf("\t+ Checking globs for %s\n", *given);
 914                 STAILQ_FOREACH(ent, globlist, cf_nextp) {
 915                         fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
 916                         if (verbose > 2)
 917                                 printf("\t+    = %d for pattern %s\n", fnres,
 918                                     ent->log);
 919                         if (fnres == 0) {
 920                                 gmatch++;
 921                                 dupent = init_entry(*given, ent);
 922                                 /* This new entry is not a glob! */
 923                                 dupent->flags &= ~CE_GLOB;
 924                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 925                                 /* Only allow a match to one glob-entry */
 926                                 break;
 927                         }
 928                 }
 929                 if (gmatch) {
 930                         if (verbose > 2)
 931                                 printf("\t+ Matched %s via %s\n", *given,
 932                                     ent->log);
 933                         continue;
 934                 }
 935
 936                 /*
 937                  * This given file was not found in any config file, so
 938                  * add a worklist item based on the default entry.
 939                  */
 940                 if (verbose > 2)
 941                         printf("\t+ No entry matched %s  (will use %s)\n",
 942                             *given, DEFAULT_MARKER);
 943                 dupent = init_entry(*given, defconf);
 944                 /* Mark that it was *not* found in a config file */
 945                 dupent->def_cfg = 1;
 946                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 947         }
 948
 949         /*
 950          * Free all the entries in the original work list, the list of
 951          * glob entries, and the default entry.
 952          */
 953         free_clist(filelist);
 954         free_clist(globlist);
 955         free_entry(defconf);
 956
 957         /* And finally, return a worklist which matches the given files. */
 958         return (cmdlist);
 959 }
 960
 961 /*
 962  * Expand the list of entries with filename patterns, and add all files
 963  * which match those glob-entries onto the worklist.
 964  */
 965 static void
 966 expand_globs(struct cflist *work_p, struct cflist *glob_p)
 967 {
 968         int gmatch, gres;
 969         size_t i;
 970         char *mfname;
 971         struct conf_entry *dupent, *ent, *globent;
 972         glob_t pglob;
 973         struct stat st_fm;
 974
 975         /*
 976          * The worklist contains all fully-specified (non-GLOB) names.
 977          *
 978          * Now expand the list of filename-pattern (GLOB) entries into
 979          * a second list, which (by definition) will only match files
 980          * that already exist.  Do not add a glob-related entry for any
 981          * file which already exists in the fully-specified list.
 982          */
 983         STAILQ_FOREACH(globent, glob_p, cf_nextp) {
 984                 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
 985                 if (gres != 0) {
 986                         warn("cannot expand pattern (%d): %s", gres,
 987                             globent->log);
 988                         continue;
 989                 }
 990
 991                 if (verbose > 2)
 992                         printf("\t+ Expanding pattern %s\n", globent->log);
 993                 for (i = 0; i < pglob.gl_matchc; i++) {
 994                         mfname = pglob.gl_pathv[i];
 995
 996                         /* See if this file already has a specific entry. */
 997                         gmatch = 0;
 998                         STAILQ_FOREACH(ent, work_p, cf_nextp) {
 999                                 if (strcmp(mfname, ent->log) == 0) {
1000                                         gmatch++;
1001                                         break;
1002                                 }
1003                         }
1004                         if (gmatch)
1005                                 continue;
1006
1007                         /* Make sure the named matched is a file. */
1008                         gres = lstat(mfname, &st_fm);
1009                         if (gres != 0) {
1010                                 /* Error on a file that glob() matched?!? */
1011                                 warn("Skipping %s - lstat() error", mfname);
1012                                 continue;
1013                         }
1014                         if (!S_ISREG(st_fm.st_mode)) {
1015                                 /* We only rotate files! */
1016                                 if (verbose > 2)
1017                                         printf("\t+  . skipping %s (!file)\n",
1018                                             mfname);
1019                                 continue;
1020                         }
1021
1022                         if (verbose > 2)
1023                                 printf("\t+  . add file %s\n", mfname);
1024                         dupent = init_entry(mfname, globent);
1025                         /* This new entry is not a glob! */
1026                         dupent->flags &= ~CE_GLOB;
1027
1028                         /* Add to the worklist. */
1029                         STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp);
1030                 }
1031                 globfree(&pglob);
1032                 if (verbose > 2)
1033                         printf("\t+ Done with pattern %s\n", globent->log);
1034         }
1035 }
1036
1037 /*
1038  * Parse a configuration file and update a linked list of all the logs to
1039  * process.
1040  */
1041 static void
1042 parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
1043     struct conf_entry *defconf_p, struct ilist *inclist)
1044 {
1045         char line[BUFSIZ], *parse, *q;
1046         char *cp, *errline, *group;
1047         struct conf_entry *working;
1048         struct passwd *pwd;
1049         struct group *grp;
1050         glob_t pglob;
1051         int eol, ptm_opts, res, special;
1052         size_t i;
1053
1054         errline = NULL;
1055         while (fgets(line, BUFSIZ, cf)) {
1056                 if ((line[0] == '\n') || (line[0] == '#') ||
1057                     (strlen(line) == 0))
1058                         continue;
1059                 if (errline != NULL)
1060                         free(errline);
1061                 errline = strdup(line);
1062                 for (cp = line + 1; *cp != '\0'; cp++) {
1063                         if (*cp != '#')
1064                                 continue;
1065                         if (*(cp - 1) == '\\') {
1066                                 strcpy(cp - 1, cp);
1067                                 cp--;
1068                                 continue;
1069                         }
1070                         *cp = '\0';
1071                         break;
1072                 }
1073
1074                 q = parse = missing_field(sob(line), errline);
1075                 parse = son(line);
1076                 if (!*parse)
1077                         errx(1, "malformed line (missing fields):\n%s",
1078                             errline);
1079                 *parse = '\0';
1080
1081                 /*
1082                  * Allow people to set debug options via the config file.
1083                  * (NOTE: debug options are undocumented, and may disappear
1084                  * at any time, etc).
1085                  */
1086                 if (strcasecmp(DEBUG_MARKER, q) == 0) {
1087                         q = parse = missing_field(sob(parse + 1), errline);
1088                         parse = son(parse);
1089                         if (!*parse)
1090                                 warnx("debug line specifies no option:\n%s",
1091                                     errline);
1092                         else {
1093                                 *parse = '\0';
1094                                 parse_doption(q);
1095                         }
1096                         continue;
1097                 } else if (strcasecmp(INCLUDE_MARKER, q) == 0) {
1098                         if (verbose)
1099                                 printf("Found: %s", errline);
1100                         q = parse = missing_field(sob(parse + 1), errline);
1101                         parse = son(parse);
1102                         if (!*parse) {
1103                                 warnx("include line missing argument:\n%s",
1104                                     errline);
1105                                 continue;
1106                         }
1107
1108                         *parse = '\0';
1109
1110                         if (isglobstr(q)) {
1111                                 res = glob(q, GLOB_NOCHECK, NULL, &pglob);
1112                                 if (res != 0) {
1113                                         warn("cannot expand pattern (%d): %s",
1114                                             res, q);
1115                                         continue;
1116                                 }
1117
1118                                 if (verbose > 2)
1119                                         printf("\t+ Expanding pattern %s\n", q);
1120
1121                                 for (i = 0; i < pglob.gl_matchc; i++)
1122                                         add_to_queue(pglob.gl_pathv[i],
1123                                             inclist);
1124                                 globfree(&pglob);
1125                         } else
1126                                 add_to_queue(q, inclist);
1127                         continue;
1128                 }
1129
1130                 special = 0;
1131                 working = init_entry(q, NULL);
1132                 if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1133                         special = 1;
1134                         if (defconf_p != NULL) {
1135                                 warnx("Ignoring duplicate entry for %s!", q);
1136                                 free_entry(working);
1137                                 continue;
1138                         }
1139                         defconf_p = working;
1140                 }
1141
1142                 q = parse = missing_field(sob(parse + 1), errline);
1143                 parse = son(parse);
1144                 if (!*parse)
1145                         errx(1, "malformed line (missing fields):\n%s",
1146                             errline);
1147                 *parse = '\0';
1148                 if ((group = strchr(q, ':')) != NULL ||
1149                     (group = strrchr(q, '.')) != NULL) {
1150                         *group++ = '\0';
1151                         if (*q) {
1152                                 if (!(isnumberstr(q))) {
1153                                         if ((pwd = getpwnam(q)) == NULL)
1154                                                 errx(1,
1155                                      "error in config file; unknown user:\n%s",
1156                                                     errline);
1157                                         working->uid = pwd->pw_uid;
1158                                 } else
1159                                         working->uid = atoi(q);
1160                         } else
1161                                 working->uid = (uid_t)-1;
1162
1163                         q = group;
1164                         if (*q) {
1165                                 if (!(isnumberstr(q))) {
1166                                         if ((grp = getgrnam(q)) == NULL)
1167                                                 errx(1,
1168                                     "error in config file; unknown group:\n%s",
1169                                                     errline);
1170                                         working->gid = grp->gr_gid;
1171                                 } else
1172                                         working->gid = atoi(q);
1173                         } else
1174                                 working->gid = (gid_t)-1;
1175
1176                         q = parse = missing_field(sob(parse + 1), errline);
1177                         parse = son(parse);
1178                         if (!*parse)
1179                                 errx(1, "malformed line (missing fields):\n%s",
1180                                     errline);
1181                         *parse = '\0';
1182                 } else {
1183                         working->uid = (uid_t)-1;
1184                         working->gid = (gid_t)-1;
1185                 }
1186
1187                 if (!sscanf(q, "%o", &working->permissions))
1188                         errx(1, "error in config file; bad permissions:\n%s",
1189                             errline);
1190
1191                 q = parse = missing_field(sob(parse + 1), errline);
1192                 parse = son(parse);
1193                 if (!*parse)
1194                         errx(1, "malformed line (missing fields):\n%s",
1195                             errline);
1196                 *parse = '\0';
1197                 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1198                         errx(1, "error in config file; bad value for count of logs to save:\n%s",
1199                             errline);
1200
1201                 q = parse = missing_field(sob(parse + 1), errline);
1202                 parse = son(parse);
1203                 if (!*parse)
1204                         errx(1, "malformed line (missing fields):\n%s",
1205                             errline);
1206                 *parse = '\0';
1207                 if (isdigitch(*q))
1208                         working->trsize = atoi(q);
1209                 else if (strcmp(q, "*") == 0)
1210                         working->trsize = -1;
1211                 else {
1212                         warnx("Invalid value of '%s' for 'size' in line:\n%s",
1213                             q, errline);
1214                         working->trsize = -1;
1215                 }
1216
1217                 working->flags = 0;
1218                 working->compress = COMPRESS_NONE;
1219                 q = parse = missing_field(sob(parse + 1), errline);
1220                 parse = son(parse);
1221                 eol = !*parse;
1222                 *parse = '\0';
1223                 {
1224                         char *ep;
1225                         u_long ul;
1226
1227                         ul = strtoul(q, &ep, 10);
1228                         if (ep == q)
1229                                 working->hours = 0;
1230                         else if (*ep == '*')
1231                                 working->hours = -1;
1232                         else if (ul > INT_MAX)
1233                                 errx(1, "interval is too large:\n%s", errline);
1234                         else
1235                                 working->hours = ul;
1236
1237                         if (*ep == '\0' || strcmp(ep, "*") == 0)
1238                                 goto no_trimat;
1239                         if (*ep != '@' && *ep != '$')
1240                                 errx(1, "malformed interval/at:\n%s", errline);
1241
1242                         working->flags |= CE_TRIMAT;
1243                         working->trim_at = ptime_init(NULL);
1244                         ptm_opts = PTM_PARSE_ISO8601;
1245                         if (*ep == '$')
1246                                 ptm_opts = PTM_PARSE_DWM;
1247                         ptm_opts |= PTM_PARSE_MATCHDOM;
1248                         res = ptime_relparse(working->trim_at, ptm_opts,
1249                             ptimeget_secs(timenow), ep + 1);
1250                         if (res == -2)
1251                                 errx(1, "nonexistent time for 'at' value:\n%s",
1252                                     errline);
1253                         else if (res < 0)
1254                                 errx(1, "malformed 'at' value:\n%s", errline);
1255                 }
1256 no_trimat:
1257
1258                 if (eol)
1259                         q = NULL;
1260                 else {
1261                         q = parse = sob(parse + 1);     /* Optional field */
1262                         parse = son(parse);
1263                         if (!*parse)
1264                                 eol = 1;
1265                         *parse = '\0';
1266                 }
1267
1268                 for (; q && *q && !isspacech(*q); q++) {
1269                         switch (tolowerch(*q)) {
1270                         case 'b':
1271                                 working->flags |= CE_BINARY;
1272                                 break;
1273                         case 'c':
1274                                 working->flags |= CE_CREATE;
1275                                 break;
1276                         case 'd':
1277                                 working->flags |= CE_NODUMP;
1278                                 break;
1279                         case 'g':
1280                                 working->flags |= CE_GLOB;
1281                                 break;
1282                         case 'j':
1283                                 working->compress = COMPRESS_BZIP2;
1284                                 break;
1285                         case 'n':
1286                                 working->flags |= CE_NOSIGNAL;
1287                                 break;
1288                         case 'r':
1289                                 working->flags |= CE_PID2CMD;
1290                                 break;
1291                         case 'u':
1292                                 working->flags |= CE_SIGNALGROUP;
1293                                 break;
1294                         case 'w':
1295                                 /* Depreciated flag - keep for compatibility purposes */
1296                                 break;
1297                         case 'x':
1298                                 working->compress = COMPRESS_XZ;
1299                                 break;
1300                         case 'z':
1301                                 working->compress = COMPRESS_GZIP;
1302                                 break;
1303                         case '-':
1304                                 break;
1305                         case 'f':       /* Used by OpenBSD for "CE_FOLLOW" */
1306                         case 'm':       /* Used by OpenBSD for "CE_MONITOR" */
1307                         case 'p':       /* Used by NetBSD  for "CE_PLAIN0" */
1308                         default:
1309                                 errx(1, "illegal flag in config file -- %c",
1310                                     *q);
1311                         }
1312                 }
1313
1314                 if (eol)
1315                         q = NULL;
1316                 else {
1317                         q = parse = sob(parse + 1);     /* Optional field */
1318                         parse = son(parse);
1319                         if (!*parse)
1320                                 eol = 1;
1321                         *parse = '\0';
1322                 }
1323
1324                 working->pid_cmd_file = NULL;
1325                 if (q && *q) {
1326                         if (*q == '/')
1327                                 working->pid_cmd_file = strdup(q);
1328                         else if (isalnum(*q))
1329                                 goto got_sig;
1330                         else {
1331                                 errx(1,
1332                         "illegal pid file or signal in config file:\n%s",
1333                                     errline);
1334                         }
1335                 }
1336                 if (eol)
1337                         q = NULL;
1338                 else {
1339                         q = parse = sob(parse + 1);     /* Optional field */
1340                         *(parse = son(parse)) = '\0';
1341                 }
1342
1343                 working->sig = SIGHUP;
1344                 if (q && *q) {
1345 got_sig:
1346                         working->sig = parse_signal(q);
1347                         if (working->sig < 1 || working->sig >= sys_nsig) {
1348                                 errx(1,
1349                                     "illegal signal in config file:\n%s",
1350                                     errline);
1351                         }
1352                 }
1353
1354                 /*
1355                  * Finish figuring out what pid-file to use (if any) in
1356                  * later processing if this logfile needs to be rotated.
1357                  */
1358                 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1359                         /*
1360                          * This config-entry specified 'n' for nosignal,
1361                          * see if it also specified an explicit pid_cmd_file.
1362                          * This would be a pretty pointless combination.
1363                          */
1364                         if (working->pid_cmd_file != NULL) {
1365                                 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1366                                     working->pid_cmd_file, errline);
1367                                 free(working->pid_cmd_file);
1368                                 working->pid_cmd_file = NULL;
1369                         }
1370                 } else if (working->pid_cmd_file == NULL) {
1371                         /*
1372                          * This entry did not specify the 'n' flag, which
1373                          * means it should signal syslogd unless it had
1374                          * specified some other pid-file (and obviously the
1375                          * syslog pid-file will not be for a process-group).
1376                          * Also, we should only try to notify syslog if we
1377                          * are root.
1378                          */
1379                         if (working->flags & CE_SIGNALGROUP) {
1380                                 warnx("Ignoring flag 'U' in line:\n%s",
1381                                     errline);
1382                                 working->flags &= ~CE_SIGNALGROUP;
1383                         }
1384                         if (needroot)
1385                                 working->pid_cmd_file = strdup(path_syslogpid);
1386                 }
1387
1388                 /*
1389                  * Add this entry to the appropriate list of entries, unless
1390                  * it was some kind of special entry (eg: <default>).
1391                  */
1392                 if (special) {
1393                         ;                       /* Do not add to any list */
1394                 } else if (working->flags & CE_GLOB) {
1395                         STAILQ_INSERT_TAIL(glob_p, working, cf_nextp);
1396                 } else {
1397                         STAILQ_INSERT_TAIL(work_p, working, cf_nextp);
1398                 }
1399         }
1400         if (errline != NULL)
1401                 free(errline);
1402 }
1403
1404 static char *
1405 missing_field(char *p, char *errline)
1406 {
1407
1408         if (!p || !*p)
1409                 errx(1, "missing field in config file:\n%s", errline);
1410         return (p);
1411 }
1412
1413 /*
1414  * In our sort we return it in the reverse of what qsort normally
1415  * would do, as we want the newest files first.  If we have two
1416  * entries with the same time we don't really care about order.
1417  *
1418  * Support function for qsort() in delete_oldest_timelog().
1419  */
1420 static int
1421 oldlog_entry_compare(const void *a, const void *b)
1422 {
1423         const struct oldlog_entry *ola = a, *olb = b;
1424
1425         if (ola->t > olb->t)
1426                 return (-1);
1427         else if (ola->t < olb->t)
1428                 return (1);
1429         else
1430                 return (0);
1431 }
1432
1433 /*
1434  * Check whether the file corresponding to dp is an archive of the logfile
1435  * logfname, based on the timefnamefmt format string. Return true and fill out
1436  * tm if this is the case; otherwise return false.
1437  */
1438 static int
1439 validate_old_timelog(int fd, const struct dirent *dp, const char *logfname,
1440     struct tm *tm)
1441 {
1442         struct stat sb;
1443         size_t logfname_len;
1444         char *s;
1445         int c;
1446
1447         logfname_len = strlen(logfname);
1448
1449         if (dp->d_type != DT_REG) {
1450                 /*
1451                  * Some filesystems (e.g. NFS) don't fill out the d_type field
1452                  * and leave it set to DT_UNKNOWN; in this case we must obtain
1453                  * the file type ourselves.
1454                  */
1455                 if (dp->d_type != DT_UNKNOWN ||
1456                     fstatat(fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) != 0 ||
1457                     !S_ISREG(sb.st_mode))
1458                         return (0);
1459         }
1460         /* Ignore everything but files with our logfile prefix. */
1461         if (strncmp(dp->d_name, logfname, logfname_len) != 0)
1462                 return (0);
1463         /* Ignore the actual non-rotated logfile. */
1464         if (dp->d_namlen == logfname_len)
1465                 return (0);
1466
1467         /*
1468          * Make sure we created have found a logfile, so the
1469          * postfix is valid, IE format is: '.<time>(.[bgx]z)?'.
1470          */
1471         if (dp->d_name[logfname_len] != '.') {
1472                 if (verbose)
1473                         printf("Ignoring %s which has unexpected "
1474                             "extension '%s'\n", dp->d_name,
1475                             &dp->d_name[logfname_len]);
1476                 return (0);
1477         }
1478         memset(tm, 0, sizeof(*tm));
1479         if ((s = strptime(&dp->d_name[logfname_len + 1],
1480             timefnamefmt, tm)) == NULL) {
1481                 /*
1482                  * We could special case "old" sequentially named logfiles here,
1483                  * but we do not as that would require special handling to
1484                  * decide which one was the oldest compared to "new" time based
1485                  * logfiles.
1486                  */
1487                 if (verbose)
1488                         printf("Ignoring %s which does not "
1489                             "match time format\n", dp->d_name);
1490                 return (0);
1491         }
1492
1493         for (c = 0; c < COMPRESS_TYPES; c++)
1494                 if (strcmp(s, compress_type[c].suffix) == 0)
1495                         /* We're done. */
1496                         return (1);
1497
1498         if (verbose)
1499                 printf("Ignoring %s which has unexpected extension '%s'\n",
1500                     dp->d_name, s);
1501
1502         return (0);
1503 }
1504
1505 /*
1506  * Delete the oldest logfiles, when using time based filenames.
1507  */
1508 static void
1509 delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
1510 {
1511         char *logfname, *s, *dir, errbuf[80];
1512         int dir_fd, i, logcnt, max_logcnt;
1513         struct oldlog_entry *oldlogs;
1514         struct dirent *dp;
1515         const char *cdir;
1516         struct tm tm;
1517         DIR *dirp;
1518
1519         oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry));
1520         max_logcnt = MAX_OLDLOGS;
1521         logcnt = 0;
1522
1523         if (archive_dir != NULL && archive_dir[0] != '\0')
1524                 cdir = archive_dir;
1525         else
1526                 if ((cdir = dirname(ent->log)) == NULL)
1527                         err(1, "dirname()");
1528         if ((dir = strdup(cdir)) == NULL)
1529                 err(1, "strdup()");
1530
1531         if ((s = basename(ent->log)) == NULL)
1532                 err(1, "basename()");
1533         if ((logfname = strdup(s)) == NULL)
1534                 err(1, "strdup()");
1535         if (strcmp(logfname, "/") == 0)
1536                 errx(1, "Invalid log filename - became '/'");
1537
1538         if (verbose > 2)
1539                 printf("Searching for old logs in %s\n", dir);
1540
1541         /* First we create a 'list' of all archived logfiles */
1542         if ((dirp = opendir(dir)) == NULL)
1543                 err(1, "Cannot open log directory '%s'", dir);
1544         dir_fd = dirfd(dirp);
1545         while ((dp = readdir(dirp)) != NULL) {
1546                 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0)
1547                         continue;
1548
1549                 /*
1550                  * We should now have old an old rotated logfile, so
1551                  * add it to the 'list'.
1552                  */
1553                 if ((oldlogs[logcnt].t = timegm(&tm)) == -1)
1554                         err(1, "Could not convert time string to time value");
1555                 if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL)
1556                         err(1, "strdup()");
1557                 logcnt++;
1558
1559                 /*
1560                  * It is very unlikely we ever run out of space in the
1561                  * logfile array from the default size, but lets
1562                  * handle it anyway...
1563                  */
1564                 if (logcnt >= max_logcnt) {
1565                         max_logcnt *= 4;
1566                         /* Detect integer overflow */
1567                         if (max_logcnt < logcnt)
1568                                 errx(1, "Too many old logfiles found");
1569                         oldlogs = realloc(oldlogs,
1570                             max_logcnt * sizeof(struct oldlog_entry));
1571                         if (oldlogs == NULL)
1572                                 err(1, "realloc()");
1573                 }
1574         }
1575
1576         /* Second, if needed we delete oldest archived logfiles */
1577         if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) {
1578                 oldlogs = realloc(oldlogs, logcnt *
1579                     sizeof(struct oldlog_entry));
1580                 if (oldlogs == NULL)
1581                         err(1, "realloc()");
1582
1583                 /*
1584                  * We now sort the logs in the order of newest to
1585                  * oldest.  That way we can simply skip over the
1586                  * number of records we want to keep.
1587                  */
1588                 qsort(oldlogs, logcnt, sizeof(struct oldlog_entry),
1589                     oldlog_entry_compare);
1590                 for (i = ent->numlogs - 1; i < logcnt; i++) {
1591                         if (noaction)
1592                                 printf("\trm -f %s/%s\n", dir,
1593                                     oldlogs[i].fname);
1594                         else if (unlinkat(dir_fd, oldlogs[i].fname, 0) != 0) {
1595                                 snprintf(errbuf, sizeof(errbuf),
1596                                     "Could not delete old logfile '%s'",
1597                                     oldlogs[i].fname);
1598                                 perror(errbuf);
1599                         }
1600                 }
1601         } else if (verbose > 1)
1602                 printf("No old logs to delete for logfile %s\n", ent->log);
1603
1604         /* Third, cleanup */
1605         closedir(dirp);
1606         for (i = 0; i < logcnt; i++) {
1607                 assert(oldlogs[i].fname != NULL);
1608                 free(oldlogs[i].fname);
1609         }
1610         free(oldlogs);
1611         free(logfname);
1612         free(dir);
1613 }
1614
1615 /*
1616  * Generate a log filename, when using classic filenames.
1617  */
1618 static void
1619 gen_classiclog_fname(char *fname, size_t fname_sz, const char *archive_dir,
1620     const char *namepart, int numlogs_c)
1621 {
1622
1623         if (archive_dir[0] != '\0')
1624                 (void) snprintf(fname, fname_sz, "%s/%s.%d", archive_dir,
1625                     namepart, numlogs_c);
1626         else
1627                 (void) snprintf(fname, fname_sz, "%s.%d", namepart, numlogs_c);
1628 }
1629
1630 /*
1631  * Delete a rotated logfile, when using classic filenames.
1632  */
1633 static void
1634 delete_classiclog(const char *archive_dir, const char *namepart, int numlog_c)
1635 {
1636         char file1[MAXPATHLEN], zfile1[MAXPATHLEN];
1637         int c;
1638
1639         gen_classiclog_fname(file1, sizeof(file1), archive_dir, namepart,
1640             numlog_c);
1641
1642         for (c = 0; c < COMPRESS_TYPES; c++) {
1643                 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1644                     compress_type[c].suffix);
1645                 if (noaction)
1646                         printf("\trm -f %s\n", zfile1);
1647                 else
1648                         (void) unlink(zfile1);
1649         }
1650 }
1651
1652 /*
1653  * Only add to the queue if the file hasn't already been added. This is
1654  * done to prevent circular include loops.
1655  */
1656 static void
1657 add_to_queue(const char *fname, struct ilist *inclist)
1658 {
1659         struct include_entry *inc;
1660
1661         STAILQ_FOREACH(inc, inclist, inc_nextp) {
1662                 if (strcmp(fname, inc->file) == 0) {
1663                         warnx("duplicate include detected: %s", fname);
1664                         return;
1665                 }
1666         }
1667
1668         inc = malloc(sizeof(struct include_entry));
1669         if (inc == NULL)
1670                 err(1, "malloc of inc");
1671         inc->file = strdup(fname);
1672
1673         if (verbose > 2)
1674                 printf("\t+ Adding %s to the processing queue.\n", fname);
1675
1676         STAILQ_INSERT_TAIL(inclist, inc, inc_nextp);
1677 }
1678
1679 /*
1680  * Search for logfile and return its compression suffix (if supported)
1681  * The suffix detection is first-match in the order of compress_types
1682  *
1683  * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE)
1684  * a zero-length string is returned
1685  */
1686 static const char *
1687 get_logfile_suffix(const char *logfile)
1688 {
1689         struct stat st;
1690         char zfile[MAXPATHLEN];
1691         int c;
1692
1693         for (c = 0; c < COMPRESS_TYPES; c++) {
1694                 (void) strlcpy(zfile, logfile, MAXPATHLEN);
1695                 (void) strlcat(zfile, compress_type[c].suffix, MAXPATHLEN);
1696                 if (lstat(zfile, &st) == 0)
1697                         return (compress_type[c].suffix);
1698         }
1699         return (NULL);
1700 }
1701
1702 static fk_entry
1703 do_rotate(const struct conf_entry *ent)
1704 {
1705         char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1706         char file1[MAXPATHLEN], file2[MAXPATHLEN];
1707         char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1708         const char *logfile_suffix;
1709         char datetimestr[30];
1710         int flags, numlogs_c;
1711         fk_entry free_or_keep;
1712         struct sigwork_entry *swork;
1713         struct stat st;
1714         struct tm tm;
1715         time_t now;
1716
1717         flags = ent->flags;
1718         free_or_keep = FREE_ENT;
1719
1720         if (archtodir) {
1721                 char *p;
1722
1723                 /* build complete name of archive directory into dirpart */
1724                 if (*archdirname == '/') {      /* absolute */
1725                         strlcpy(dirpart, archdirname, sizeof(dirpart));
1726                 } else {        /* relative */
1727                         /* get directory part of logfile */
1728                         strlcpy(dirpart, ent->log, sizeof(dirpart));
1729                         if ((p = strrchr(dirpart, '/')) == NULL)
1730                                 dirpart[0] = '\0';
1731                         else
1732                                 *(p + 1) = '\0';
1733                         strlcat(dirpart, archdirname, sizeof(dirpart));
1734                 }
1735
1736                 /* check if archive directory exists, if not, create it */
1737                 if (lstat(dirpart, &st))
1738                         createdir(ent, dirpart);
1739
1740                 /* get filename part of logfile */
1741                 if ((p = strrchr(ent->log, '/')) == NULL)
1742                         strlcpy(namepart, ent->log, sizeof(namepart));
1743                 else
1744                         strlcpy(namepart, p + 1, sizeof(namepart));
1745         } else {
1746                 /*
1747                  * Tell utility functions we are not using an archive
1748                  * dir.
1749                  */
1750                 dirpart[0] = '\0';
1751                 strlcpy(namepart, ent->log, sizeof(namepart));
1752         }
1753
1754         /* Delete old logs */
1755         if (timefnamefmt != NULL)
1756                 delete_oldest_timelog(ent, dirpart);
1757         else {
1758                 /*
1759                  * Handle cleaning up after legacy newsyslog where we
1760                  * kept ent->numlogs + 1 files.  This code can go away
1761                  * at some point in the future.
1762                  */
1763                 delete_classiclog(dirpart, namepart, ent->numlogs);
1764
1765                 if (ent->numlogs > 0)
1766                         delete_classiclog(dirpart, namepart, ent->numlogs - 1);
1767
1768         }
1769
1770         if (timefnamefmt != NULL) {
1771                 /* If time functions fails we can't really do any sensible */
1772                 if (time(&now) == (time_t)-1 ||
1773                     localtime_r(&now, &tm) == NULL)
1774                         bzero(&tm, sizeof(tm));
1775
1776                 strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm);
1777                 if (archtodir)
1778                         (void) snprintf(file1, sizeof(file1), "%s/%s.%s",
1779                             dirpart, namepart, datetimestr);
1780                 else
1781                         (void) snprintf(file1, sizeof(file1), "%s.%s",
1782                             ent->log, datetimestr);
1783
1784                 /* Don't run the code to move down logs */
1785                 numlogs_c = -1;
1786         } else {
1787                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1788                     ent->numlogs - 1);
1789                 numlogs_c = ent->numlogs - 2;           /* copy for countdown */
1790         }
1791
1792         /* Move down log files */
1793         for (; numlogs_c >= 0; numlogs_c--) {
1794                 (void) strlcpy(file2, file1, sizeof(file2));
1795
1796                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1797                     numlogs_c);
1798
1799                 logfile_suffix = get_logfile_suffix(file1);
1800                 if (logfile_suffix == NULL)
1801                         continue;
1802                 (void) strlcpy(zfile1, file1, MAXPATHLEN);
1803                 (void) strlcpy(zfile2, file2, MAXPATHLEN);
1804                 (void) strlcat(zfile1, logfile_suffix, MAXPATHLEN);
1805                 (void) strlcat(zfile2, logfile_suffix, MAXPATHLEN);
1806
1807                 if (noaction)
1808                         printf("\tmv %s %s\n", zfile1, zfile2);
1809                 else {
1810                         /* XXX - Ought to be checking for failure! */
1811                         (void)rename(zfile1, zfile2);
1812                 }
1813                 change_attrs(zfile2, ent);
1814         }
1815
1816         if (ent->numlogs > 0) {
1817                 if (noaction) {
1818                         /*
1819                          * Note that savelog() may succeed with using link()
1820                          * for the archtodir case, but there is no good way
1821                          * of knowing if it will when doing "noaction", so
1822                          * here we claim that it will have to do a copy...
1823                          */
1824                         if (archtodir)
1825                                 printf("\tcp %s %s\n", ent->log, file1);
1826                         else
1827                                 printf("\tln %s %s\n", ent->log, file1);
1828                         printf("\ttouch %s\t\t"
1829                             "# Update mtime for 'when'-interval processing\n",
1830                             file1);
1831                 } else {
1832                         if (!(flags & CE_BINARY)) {
1833                                 /* Report the trimming to the old log */
1834                                 log_trim(ent->log, ent);
1835                         }
1836                         savelog(ent->log, file1);
1837                         /*
1838                          * Interval-based rotations are done using the mtime of
1839                          * the most recently archived log, so make sure it gets
1840                          * updated during a rotation.
1841                          */
1842                         utimes(file1, NULL);
1843                 }
1844                 change_attrs(file1, ent);
1845         }
1846
1847         /* Create the new log file and move it into place */
1848         if (noaction)
1849                 printf("Start new log...\n");
1850         createlog(ent);
1851
1852         /*
1853          * Save all signalling and file-compression to be done after log
1854          * files from all entries have been rotated.  This way any one
1855          * process will not be sent the same signal multiple times when
1856          * multiple log files had to be rotated.
1857          */
1858         swork = NULL;
1859         if (ent->pid_cmd_file != NULL)
1860                 swork = save_sigwork(ent);
1861         if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) {
1862                 /*
1863                  * The zipwork_entry will include a pointer to this
1864                  * conf_entry, so the conf_entry should not be freed.
1865                  */
1866                 free_or_keep = KEEP_ENT;
1867                 save_zipwork(ent, swork, ent->fsize, file1);
1868         }
1869
1870         return (free_or_keep);
1871 }
1872
1873 static void
1874 do_sigwork(struct sigwork_entry *swork)
1875 {
1876         struct sigwork_entry *nextsig;
1877         int kres, secs;
1878         char *tmp;
1879
1880         if (swork->sw_runcmd == 0 && (!(swork->sw_pidok) || swork->sw_pid == 0))
1881                 return;                 /* no work to do... */
1882
1883         /*
1884          * If nosignal (-s) was specified, then do not signal any process.
1885          * Note that a nosignal request triggers a warning message if the
1886          * rotated logfile needs to be compressed, *unless* -R was also
1887          * specified.  We assume that an `-sR' request came from a process
1888          * which writes to the logfile, and as such, we assume that process
1889          * has already made sure the logfile is not presently in use.  This
1890          * just sets swork->sw_pidok to a special value, and do_zipwork
1891          * will print any necessary warning(s).
1892          */
1893         if (nosignal) {
1894                 if (!rotatereq)
1895                         swork->sw_pidok = -1;
1896                 return;
1897         }
1898
1899         /*
1900          * Compute the pause between consecutive signals.  Use a longer
1901          * sleep time if we will be sending two signals to the same
1902          * daemon or process-group.
1903          */
1904         secs = 0;
1905         nextsig = SLIST_NEXT(swork, sw_nextp);
1906         if (nextsig != NULL) {
1907                 if (swork->sw_pid == nextsig->sw_pid)
1908                         secs = 10;
1909                 else
1910                         secs = 1;
1911         }
1912
1913         if (noaction) {
1914                 if (swork->sw_runcmd)
1915                         printf("\tsh -c '%s %d'\n", swork->sw_fname,
1916                             swork->sw_signum);
1917                 else {
1918                         printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1919                             (int)swork->sw_pid, swork->sw_fname);
1920                         if (secs > 0)
1921                                 printf("\tsleep %d\n", secs);
1922                 }
1923                 return;
1924         }
1925
1926         if (swork->sw_runcmd) {
1927                 asprintf(&tmp, "%s %d", swork->sw_fname, swork->sw_signum);
1928                 if (tmp == NULL) {
1929                         warn("can't allocate memory to run %s",
1930                             swork->sw_fname);
1931                         return;
1932                 }
1933                 if (verbose)
1934                         printf("Run command: %s\n", tmp);
1935                 kres = system(tmp);
1936                 if (kres) {
1937                         warnx("%s: returned non-zero exit code: %d",
1938                             tmp, kres);
1939                 }
1940                 free(tmp);
1941                 return;
1942         }
1943
1944         kres = kill(swork->sw_pid, swork->sw_signum);
1945         if (kres != 0) {
1946                 /*
1947                  * Assume that "no such process" (ESRCH) is something
1948                  * to warn about, but is not an error.  Presumably the
1949                  * process which writes to the rotated log file(s) is
1950                  * gone, in which case we should have no problem with
1951                  * compressing the rotated log file(s).
1952                  */
1953                 if (errno != ESRCH)
1954                         swork->sw_pidok = 0;
1955                 warn("can't notify %s, pid %d = %s", swork->sw_pidtype,
1956                     (int)swork->sw_pid, swork->sw_fname);
1957         } else {
1958                 if (verbose)
1959                         printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
1960                             (int)swork->sw_pid, swork->sw_fname);
1961                 if (secs > 0) {
1962                         if (verbose)
1963                                 printf("Pause %d second(s) between signals\n",
1964                                     secs);
1965                         sleep(secs);
1966                 }
1967         }
1968 }
1969
1970 static void
1971 do_zipwork(struct zipwork_entry *zwork)
1972 {
1973         const char *pgm_name, *pgm_path;
1974         int errsav, fcount, zstatus;
1975         pid_t pidzip, wpid;
1976         char zresult[MAXPATHLEN];
1977         int c;
1978
1979         assert(zwork != NULL);
1980         pgm_path = NULL;
1981         strlcpy(zresult, zwork->zw_fname, sizeof(zresult));
1982         if (zwork->zw_conf != NULL &&
1983             zwork->zw_conf->compress > COMPRESS_NONE)
1984                 for (c = 1; c < COMPRESS_TYPES; c++) {
1985                         if (zwork->zw_conf->compress == c) {
1986                                 pgm_path = compress_type[c].path;
1987                                 (void) strlcat(zresult,
1988                                     compress_type[c].suffix, sizeof(zresult));
1989                                 break;
1990                         }
1991                 }
1992         if (pgm_path == NULL) {
1993                 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname);
1994                 return;
1995         }
1996         pgm_name = strrchr(pgm_path, '/');
1997         if (pgm_name == NULL)
1998                 pgm_name = pgm_path;
1999         else
2000                 pgm_name++;
2001
2002         if (zwork->zw_swork != NULL && zwork->zw_swork->sw_runcmd == 0 &&
2003             zwork->zw_swork->sw_pidok <= 0) {
2004                 warnx(
2005                     "log %s not compressed because daemon(s) not notified",
2006                     zwork->zw_fname);
2007                 change_attrs(zwork->zw_fname, zwork->zw_conf);
2008                 return;
2009         }
2010
2011         if (noaction) {
2012                 printf("\t%s %s\n", pgm_name, zwork->zw_fname);
2013                 change_attrs(zresult, zwork->zw_conf);
2014                 return;
2015         }
2016
2017         fcount = 1;
2018         pidzip = fork();
2019         while (pidzip < 0) {
2020                 /*
2021                  * The fork failed.  If the failure was due to a temporary
2022                  * problem, then wait a short time and try it again.
2023                  */
2024                 errsav = errno;
2025                 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname);
2026                 if (errsav != EAGAIN || fcount > 5)
2027                         errx(1, "Exiting...");
2028                 sleep(fcount * 12);
2029                 fcount++;
2030                 pidzip = fork();
2031         }
2032         if (!pidzip) {
2033                 /* The child process executes the compression command */
2034                 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0);
2035                 err(1, "execl(`%s -f %s')", pgm_path, zwork->zw_fname);
2036         }
2037
2038         wpid = waitpid(pidzip, &zstatus, 0);
2039         if (wpid == -1) {
2040                 /* XXX - should this be a fatal error? */
2041                 warn("%s: waitpid(%d)", pgm_path, pidzip);
2042                 return;
2043         }
2044         if (!WIFEXITED(zstatus)) {
2045                 warnx("`%s -f %s' did not terminate normally", pgm_name,
2046                     zwork->zw_fname);
2047                 return;
2048         }
2049         if (WEXITSTATUS(zstatus)) {
2050                 warnx("`%s -f %s' terminated with a non-zero status (%d)",
2051                     pgm_name, zwork->zw_fname, WEXITSTATUS(zstatus));
2052                 return;
2053         }
2054
2055         /* Compression was successful, set file attributes on the result. */
2056         change_attrs(zresult, zwork->zw_conf);
2057 }
2058
2059 /*
2060  * Save information on any process we need to signal.  Any single
2061  * process may need to be sent different signal-values for different
2062  * log files, but usually a single signal-value will cause the process
2063  * to close and re-open all of it's log files.
2064  */
2065 static struct sigwork_entry *
2066 save_sigwork(const struct conf_entry *ent)
2067 {
2068         struct sigwork_entry *sprev, *stmp;
2069         int ndiff;
2070         size_t tmpsiz;
2071
2072         sprev = NULL;
2073         ndiff = 1;
2074         SLIST_FOREACH(stmp, &swhead, sw_nextp) {
2075                 ndiff = strcmp(ent->pid_cmd_file, stmp->sw_fname);
2076                 if (ndiff > 0)
2077                         break;
2078                 if (ndiff == 0) {
2079                         if (ent->sig == stmp->sw_signum)
2080                                 break;
2081                         if (ent->sig > stmp->sw_signum) {
2082                                 ndiff = 1;
2083                                 break;
2084                         }
2085                 }
2086                 sprev = stmp;
2087         }
2088         if (stmp != NULL && ndiff == 0)
2089                 return (stmp);
2090
2091         tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_cmd_file) + 1;
2092         stmp = malloc(tmpsiz);
2093
2094         stmp->sw_runcmd = 0;
2095         /* If this is a command to run we just set the flag and run command */
2096         if (ent->flags & CE_PID2CMD) {
2097                 stmp->sw_pid = -1;
2098                 stmp->sw_pidok = 0;
2099                 stmp->sw_runcmd = 1;
2100         } else {
2101                 set_swpid(stmp, ent);
2102         }
2103         stmp->sw_signum = ent->sig;
2104         strcpy(stmp->sw_fname, ent->pid_cmd_file);
2105         if (sprev == NULL)
2106                 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
2107         else
2108                 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
2109         return (stmp);
2110 }
2111
2112 /*
2113  * Save information on any file we need to compress.  We may see the same
2114  * file multiple times, so check the full list to avoid duplicates.  The
2115  * list itself is sorted smallest-to-largest, because that's the order we
2116  * want to compress the files.  If the partition is very low on disk space,
2117  * then the smallest files are the most likely to compress, and compressing
2118  * them first will free up more space for the larger files.
2119  */
2120 static struct zipwork_entry *
2121 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
2122     int zsize, const char *zipfname)
2123 {
2124         struct zipwork_entry *zprev, *ztmp;
2125         int ndiff;
2126         size_t tmpsiz;
2127
2128         /* Compute the size if the caller did not know it. */
2129         if (zsize < 0)
2130                 zsize = sizefile(zipfname);
2131
2132         zprev = NULL;
2133         ndiff = 1;
2134         SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
2135                 ndiff = strcmp(zipfname, ztmp->zw_fname);
2136                 if (ndiff == 0)
2137                         break;
2138                 if (zsize > ztmp->zw_fsize)
2139                         zprev = ztmp;
2140         }
2141         if (ztmp != NULL && ndiff == 0)
2142                 return (ztmp);
2143
2144         tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
2145         ztmp = malloc(tmpsiz);
2146         ztmp->zw_conf = ent;
2147         ztmp->zw_swork = swork;
2148         ztmp->zw_fsize = zsize;
2149         strcpy(ztmp->zw_fname, zipfname);
2150         if (zprev == NULL)
2151                 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
2152         else
2153                 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
2154         return (ztmp);
2155 }
2156
2157 /* Send a signal to the pid specified by pidfile */
2158 static void
2159 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
2160 {
2161         FILE *f;
2162         long minok, maxok, rval;
2163         char *endp, *linep, line[BUFSIZ];
2164
2165         minok = MIN_PID;
2166         maxok = MAX_PID;
2167         swork->sw_pidok = 0;
2168         swork->sw_pid = 0;
2169         swork->sw_pidtype = "daemon";
2170         if (ent->flags & CE_SIGNALGROUP) {
2171                 /*
2172                  * If we are expected to signal a process-group when
2173                  * rotating this logfile, then the value read in should
2174                  * be the negative of a valid process ID.
2175                  */
2176                 minok = -MAX_PID;
2177                 maxok = -MIN_PID;
2178                 swork->sw_pidtype = "process-group";
2179         }
2180
2181         f = fopen(ent->pid_cmd_file, "r");
2182         if (f == NULL) {
2183                 if (errno == ENOENT && enforcepid == 0) {
2184                         /*
2185                          * Warn if the PID file doesn't exist, but do
2186                          * not consider it an error.  Most likely it
2187                          * means the process has been terminated,
2188                          * so it should be safe to rotate any log
2189                          * files that the process would have been using.
2190                          */
2191                         swork->sw_pidok = 1;
2192                         warnx("pid file doesn't exist: %s", ent->pid_cmd_file);
2193                 } else
2194                         warn("can't open pid file: %s", ent->pid_cmd_file);
2195                 return;
2196         }
2197
2198         if (fgets(line, BUFSIZ, f) == NULL) {
2199                 /*
2200                  * Warn if the PID file is empty, but do not consider
2201                  * it an error.  Most likely it means the process has
2202                  * has terminated, so it should be safe to rotate any
2203                  * log files that the process would have been using.
2204                  */
2205                 if (feof(f) && enforcepid == 0) {
2206                         swork->sw_pidok = 1;
2207                         warnx("pid/cmd file is empty: %s", ent->pid_cmd_file);
2208                 } else
2209                         warn("can't read from pid file: %s", ent->pid_cmd_file);
2210                 (void)fclose(f);
2211                 return;
2212         }
2213         (void)fclose(f);
2214
2215         errno = 0;
2216         linep = line;
2217         while (*linep == ' ')
2218                 linep++;
2219         rval = strtol(linep, &endp, 10);
2220         if (*endp != '\0' && !isspacech(*endp)) {
2221                 warnx("pid file does not start with a valid number: %s",
2222                     ent->pid_cmd_file);
2223         } else if (rval < minok || rval > maxok) {
2224                 warnx("bad value '%ld' for process number in %s",
2225                     rval, ent->pid_cmd_file);
2226                 if (verbose)
2227                         warnx("\t(expecting value between %ld and %ld)",
2228                             minok, maxok);
2229         } else {
2230                 swork->sw_pidok = 1;
2231                 swork->sw_pid = rval;
2232         }
2233
2234         return;
2235 }
2236
2237 /* Log the fact that the logs were turned over */
2238 static int
2239 log_trim(const char *logname, const struct conf_entry *log_ent)
2240 {
2241         FILE *f;
2242         const char *xtra;
2243
2244         if ((f = fopen(logname, "a")) == NULL)
2245                 return (-1);
2246         xtra = "";
2247         if (log_ent->def_cfg)
2248                 xtra = " using <default> rule";
2249         if (log_ent->firstcreate)
2250                 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n",
2251                     daytime, hostname, (int) getpid(), xtra);
2252         else if (log_ent->r_reason != NULL)
2253                 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n",
2254                     daytime, hostname, (int) getpid(), log_ent->r_reason, xtra);
2255         else
2256                 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n",
2257                     daytime, hostname, (int) getpid(), xtra);
2258         if (fclose(f) == EOF)
2259                 err(1, "log_trim: fclose");
2260         return (0);
2261 }
2262
2263 /* Return size in kilobytes of a file */
2264 static int
2265 sizefile(const char *file)
2266 {
2267         struct stat sb;
2268
2269         if (stat(file, &sb) < 0)
2270                 return (-1);
2271         return (kbytes(sb.st_size));
2272 }
2273
2274 /*
2275  * Return the mtime of the most recent archive of the logfile, using timestamp
2276  * based filenames.
2277  */
2278 static time_t
2279 mtime_old_timelog(const char *file)
2280 {
2281         struct stat sb;
2282         struct tm tm;
2283         int dir_fd;
2284         time_t t;
2285         struct dirent *dp;
2286         DIR *dirp;
2287         char *s, *logfname, *dir;
2288
2289         t = -1;
2290
2291         if ((dir = dirname(file)) == NULL) {
2292                 warn("dirname() of '%s'", file);
2293                 return (t);
2294         }
2295         if ((s = basename(file)) == NULL) {
2296                 warn("basename() of '%s'", file);
2297                 return (t);
2298         } else if (s[0] == '/') {
2299                 warnx("Invalid log filename '%s'", s);
2300                 return (t);
2301         } else if ((logfname = strdup(s)) == NULL)
2302                 err(1, "strdup()");
2303
2304         if ((dirp = opendir(dir)) == NULL) {
2305                 warn("Cannot open log directory '%s'", dir);
2306                 return (t);
2307         }
2308         dir_fd = dirfd(dirp);
2309         /* Open the archive dir and find the most recent archive of logfname. */
2310         while ((dp = readdir(dirp)) != NULL) {
2311                 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0)
2312                         continue;
2313
2314                 if (fstatat(dir_fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) == -1) {
2315                         warn("Cannot stat '%s'", file);
2316                         continue;
2317                 }
2318                 if (t < sb.st_mtime)
2319                         t = sb.st_mtime;
2320         }
2321         closedir(dirp);
2322
2323         return (t);
2324 }
2325
2326 /* Return the age in hours of the most recent archive of the logfile. */
2327 static int
2328 age_old_log(const char *file)
2329 {
2330         struct stat sb;
2331         const char *logfile_suffix;
2332         char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1];
2333         time_t mtime;
2334
2335         if (archtodir) {
2336                 char *p;
2337
2338                 /* build name of archive directory into tmp */
2339                 if (*archdirname == '/') {      /* absolute */
2340                         strlcpy(tmp, archdirname, sizeof(tmp));
2341                 } else {        /* relative */
2342                         /* get directory part of logfile */
2343                         strlcpy(tmp, file, sizeof(tmp));
2344                         if ((p = strrchr(tmp, '/')) == NULL)
2345                                 tmp[0] = '\0';
2346                         else
2347                                 *(p + 1) = '\0';
2348                         strlcat(tmp, archdirname, sizeof(tmp));
2349                 }
2350
2351                 strlcat(tmp, "/", sizeof(tmp));
2352
2353                 /* get filename part of logfile */
2354                 if ((p = strrchr(file, '/')) == NULL)
2355                         strlcat(tmp, file, sizeof(tmp));
2356                 else
2357                         strlcat(tmp, p + 1, sizeof(tmp));
2358         } else {
2359                 (void) strlcpy(tmp, file, sizeof(tmp));
2360         }
2361
2362         if (timefnamefmt != NULL) {
2363                 mtime = mtime_old_timelog(tmp);
2364                 if (mtime == -1)
2365                         return (-1);
2366         } else {
2367                 strlcat(tmp, ".0", sizeof(tmp));
2368                 logfile_suffix = get_logfile_suffix(tmp);
2369                 if (logfile_suffix == NULL)
2370                         return (-1);
2371                 (void) strlcat(tmp, logfile_suffix, sizeof(tmp));
2372                 if (stat(tmp, &sb) < 0)
2373                         return (-1);
2374                 mtime = sb.st_mtime;
2375         }
2376
2377         return ((int)(ptimeget_secs(timenow) - mtime + 1800) / 3600);
2378 }
2379
2380 /* Skip Over Blanks */
2381 static char *
2382 sob(char *p)
2383 {
2384         while (p && *p && isspace(*p))
2385                 p++;
2386         return (p);
2387 }
2388
2389 /* Skip Over Non-Blanks */
2390 static char *
2391 son(char *p)
2392 {
2393         while (p && *p && !isspace(*p))
2394                 p++;
2395         return (p);
2396 }
2397
2398 /* Check if string is actually a number */
2399 static int
2400 isnumberstr(const char *string)
2401 {
2402         while (*string) {
2403                 if (!isdigitch(*string++))
2404                         return (0);
2405         }
2406         return (1);
2407 }
2408
2409 /* Check if string contains a glob */
2410 static int
2411 isglobstr(const char *string)
2412 {
2413         char chr;
2414
2415         while ((chr = *string++)) {
2416                 if (chr == '*' || chr == '?' || chr == '[')
2417                         return (1);
2418         }
2419         return (0);
2420 }
2421
2422 /*
2423  * Save the active log file under a new name.  A link to the new name
2424  * is the quick-and-easy way to do this.  If that fails (which it will
2425  * if the destination is on another partition), then make a copy of
2426  * the file to the new location.
2427  */
2428 static void
2429 savelog(char *from, char *to)
2430 {
2431         FILE *src, *dst;
2432         int c, res;
2433
2434         res = link(from, to);
2435         if (res == 0)
2436                 return;
2437
2438         if ((src = fopen(from, "r")) == NULL)
2439                 err(1, "can't fopen %s for reading", from);
2440         if ((dst = fopen(to, "w")) == NULL)
2441                 err(1, "can't fopen %s for writing", to);
2442
2443         while ((c = getc(src)) != EOF) {
2444                 if ((putc(c, dst)) == EOF)
2445                         err(1, "error writing to %s", to);
2446         }
2447
2448         if (ferror(src))
2449                 err(1, "error reading from %s", from);
2450         if ((fclose(src)) != 0)
2451                 err(1, "can't fclose %s", to);
2452         if ((fclose(dst)) != 0)
2453                 err(1, "can't fclose %s", from);
2454 }
2455
2456 /* create one or more directory components of a path */
2457 static void
2458 createdir(const struct conf_entry *ent, char *dirpart)
2459 {
2460         int res;
2461         char *s, *d;
2462         char mkdirpath[MAXPATHLEN];
2463         struct stat st;
2464
2465         s = dirpart;
2466         d = mkdirpath;
2467
2468         for (;;) {
2469                 *d++ = *s++;
2470                 if (*s != '/' && *s != '\0')
2471                         continue;
2472                 *d = '\0';
2473                 res = lstat(mkdirpath, &st);
2474                 if (res != 0) {
2475                         if (noaction) {
2476                                 printf("\tmkdir %s\n", mkdirpath);
2477                         } else {
2478                                 res = mkdir(mkdirpath, 0755);
2479                                 if (res != 0)
2480                                         err(1, "Error on mkdir(\"%s\") for -a",
2481                                             mkdirpath);
2482                         }
2483                 }
2484                 if (*s == '\0')
2485                         break;
2486         }
2487         if (verbose) {
2488                 if (ent->firstcreate)
2489                         printf("Created directory '%s' for new %s\n",
2490                             dirpart, ent->log);
2491                 else
2492                         printf("Created directory '%s' for -a\n", dirpart);
2493         }
2494 }
2495
2496 /*
2497  * Create a new log file, destroying any currently-existing version
2498  * of the log file in the process.  If the caller wants a backup copy
2499  * of the file to exist, they should call 'link(logfile,logbackup)'
2500  * before calling this routine.
2501  */
2502 void
2503 createlog(const struct conf_entry *ent)
2504 {
2505         int fd, failed;
2506         struct stat st;
2507         char *realfile, *slash, tempfile[MAXPATHLEN];
2508
2509         fd = -1;
2510         realfile = ent->log;
2511
2512         /*
2513          * If this log file is being created for the first time (-C option),
2514          * then it may also be true that the parent directory does not exist
2515          * yet.  Check, and create that directory if it is missing.
2516          */
2517         if (ent->firstcreate) {
2518                 strlcpy(tempfile, realfile, sizeof(tempfile));
2519                 slash = strrchr(tempfile, '/');
2520                 if (slash != NULL) {
2521                         *slash = '\0';
2522                         failed = stat(tempfile, &st);
2523                         if (failed && errno != ENOENT)
2524                                 err(1, "Error on stat(%s)", tempfile);
2525                         if (failed)
2526                                 createdir(ent, tempfile);
2527                         else if (!S_ISDIR(st.st_mode))
2528                                 errx(1, "%s exists but is not a directory",
2529                                     tempfile);
2530                 }
2531         }
2532
2533         /*
2534          * First create an unused filename, so it can be chown'ed and
2535          * chmod'ed before it is moved into the real location.  mkstemp
2536          * will create the file mode=600 & owned by us.  Note that all
2537          * temp files will have a suffix of '.z<something>'.
2538          */
2539         strlcpy(tempfile, realfile, sizeof(tempfile));
2540         strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2541         if (noaction)
2542                 printf("\tmktemp %s\n", tempfile);
2543         else {
2544                 fd = mkstemp(tempfile);
2545                 if (fd < 0)
2546                         err(1, "can't mkstemp logfile %s", tempfile);
2547
2548                 /*
2549                  * Add status message to what will become the new log file.
2550                  */
2551                 if (!(ent->flags & CE_BINARY)) {
2552                         if (log_trim(tempfile, ent))
2553                                 err(1, "can't add status message to log");
2554                 }
2555         }
2556
2557         /* Change the owner/group, if we are supposed to */
2558         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2559                 if (noaction)
2560                         printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2561                             tempfile);
2562                 else {
2563                         failed = fchown(fd, ent->uid, ent->gid);
2564                         if (failed)
2565                                 err(1, "can't fchown temp file %s", tempfile);
2566                 }
2567         }
2568
2569         /* Turn on NODUMP if it was requested in the config-file. */
2570         if (ent->flags & CE_NODUMP) {
2571                 if (noaction)
2572                         printf("\tchflags nodump %s\n", tempfile);
2573                 else {
2574                         failed = fchflags(fd, UF_NODUMP);
2575                         if (failed) {
2576                                 warn("log_trim: fchflags(NODUMP)");
2577                         }
2578                 }
2579         }
2580
2581         /*
2582          * Note that if the real logfile still exists, and if the call
2583          * to rename() fails, then "neither the old file nor the new
2584          * file shall be changed or created" (to quote the standard).
2585          * If the call succeeds, then the file will be replaced without
2586          * any window where some other process might find that the file
2587          * did not exist.
2588          * XXX - ? It may be that for some error conditions, we could
2589          *      retry by first removing the realfile and then renaming.
2590          */
2591         if (noaction) {
2592                 printf("\tchmod %o %s\n", ent->permissions, tempfile);
2593                 printf("\tmv %s %s\n", tempfile, realfile);
2594         } else {
2595                 failed = fchmod(fd, ent->permissions);
2596                 if (failed)
2597                         err(1, "can't fchmod temp file '%s'", tempfile);
2598                 failed = rename(tempfile, realfile);
2599                 if (failed)
2600                         err(1, "can't mv %s to %s", tempfile, realfile);
2601         }
2602
2603         if (fd >= 0)
2604                 close(fd);
2605 }
2606
2607 /*
2608  * Change the attributes of a given filename to what was specified in
2609  * the newsyslog.conf entry.  This routine is only called for files
2610  * that newsyslog expects that it has created, and thus it is a fatal
2611  * error if this routine finds that the file does not exist.
2612  */
2613 static void
2614 change_attrs(const char *fname, const struct conf_entry *ent)
2615 {
2616         int failed;
2617
2618         if (noaction) {
2619                 printf("\tchmod %o %s\n", ent->permissions, fname);
2620
2621                 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2622                         printf("\tchown %u:%u %s\n",
2623                             ent->uid, ent->gid, fname);
2624
2625                 if (ent->flags & CE_NODUMP)
2626                         printf("\tchflags nodump %s\n", fname);
2627                 return;
2628         }
2629
2630         failed = chmod(fname, ent->permissions);
2631         if (failed) {
2632                 if (errno != EPERM)
2633                         err(1, "chmod(%s) in change_attrs", fname);
2634                 warn("change_attrs couldn't chmod(%s)", fname);
2635         }
2636
2637         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2638                 failed = chown(fname, ent->uid, ent->gid);
2639                 if (failed)
2640                         warn("can't chown %s", fname);
2641         }
2642
2643         if (ent->flags & CE_NODUMP) {
2644                 failed = chflags(fname, UF_NODUMP);
2645                 if (failed)
2646                         warn("can't chflags %s NODUMP", fname);
2647         }
2648 }
2649
2650 /*
2651  * Parse a signal number or signal name. Returns the signal number parsed or -1
2652  * on failure.
2653  */
2654 static int
2655 parse_signal(const char *str)
2656 {
2657         int sig, i;
2658         const char *errstr;
2659
2660         sig = strtonum(str, 1, sys_nsig - 1, &errstr);
2661
2662         if (errstr == NULL)
2663                 return (sig);
2664         if (strncasecmp(str, "SIG", 3) == 0)
2665                 str += 3;
2666
2667         for (i = 1; i < sys_nsig; i++) {
2668                 if (strcasecmp(str, sys_signame[i]) == 0)
2669                         return (i);
2670         }
2671
2672         return (-1);
2673 }