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  * $FreeBSD: src/usr.sbin/newsyslog/newsyslog.c,v 1.117 2011/01/31 10:57:54 mm Exp $
  50  */
  51
  52 /*
  53  * newsyslog - roll over selected logs at the appropriate time, keeping the a
  54  * specified number of backup files around.
  55  */
  56
  57 #define OSF
  58
  59 #include <sys/param.h>
  60 #include <sys/queue.h>
  61 #include <sys/stat.h>
  62 #include <sys/user.h>
  63 #include <sys/wait.h>
  64
  65 #include <assert.h>
  66 #include <ctype.h>
  67 #include <err.h>
  68 #include <errno.h>
  69 #include <dirent.h>
  70 #include <fcntl.h>
  71 #include <fnmatch.h>
  72 #include <glob.h>
  73 #include <grp.h>
  74 #include <paths.h>
  75 #include <pwd.h>
  76 #include <signal.h>
  77 #include <stdio.h>
  78 #include <libgen.h>
  79 #include <stdlib.h>
  80 #include <string.h>
  81 #include <time.h>
  82 #include <unistd.h>
  83
  84 #include "pathnames.h"
  85 #include "extern.h"
  86
  87 /*
  88  * Compression suffixes
  89  */
  90 #ifndef COMPRESS_SUFFIX_GZ
  91 #define COMPRESS_SUFFIX_GZ      ".gz"
  92 #endif
  93
  94 #ifndef COMPRESS_SUFFIX_BZ2
  95 #define COMPRESS_SUFFIX_BZ2     ".bz2"
  96 #endif
  97
  98 #ifndef COMPRESS_SUFFIX_XZ
  99 #define COMPRESS_SUFFIX_XZ      ".xz"
 100 #endif
 101
 102 #define COMPRESS_SUFFIX_MAXLEN  MAX(MAX(sizeof(COMPRESS_SUFFIX_GZ),sizeof(COMPRESS_SUFFIX_BZ2)),sizeof(COMPRESS_SUFFIX_XZ))
 103
 104 /*
 105  * Compression types
 106  */
 107 #define COMPRESS_TYPES  4       /* Number of supported compression types */
 108
 109 #define COMPRESS_NONE   0
 110 #define COMPRESS_GZIP   1
 111 #define COMPRESS_BZIP2  2
 112 #define COMPRESS_XZ     3
 113
 114 /*
 115  * Bit-values for the 'flags' parsed from a config-file entry.
 116  */
 117 #define CE_BINARY       0x0008  /* Logfile is in binary, do not add status */
 118                                 /*    messages to logfile(s) when rotating. */
 119 #define CE_NOSIGNAL     0x0010  /* There is no process to signal when */
 120                                 /*    trimming this file. */
 121 #define CE_TRIMAT       0x0020  /* trim file at a specific time. */
 122 #define CE_GLOB         0x0040  /* name of the log is file name pattern. */
 123 #define CE_SIGNALGROUP  0x0080  /* Signal a process-group instead of a single */
 124                                 /*    process when trimming this file. */
 125 #define CE_CREATE       0x0100  /* Create the log file if it does not exist. */
 126 #define CE_NODUMP       0x0200  /* Set 'nodump' on newly created log file. */
 127
 128 #define MIN_PID         5       /* Don't touch pids lower than this */
 129 #define MAX_PID         PID_MAX /* was lower, see /usr/include/sys/proc.h */
 130
 131 #define kbytes(size)  (((size) + 1023) >> 10)
 132
 133 #define DEFAULT_MARKER  "<default>"
 134 #define DEBUG_MARKER    "<debug>"
 135 #define INCLUDE_MARKER  "<include>"
 136 #define DEFAULT_TIMEFNAME_FMT   "%Y%m%dT%H%M%S"
 137
 138 #define MAX_OLDLOGS 65536       /* Default maximum number of old logfiles */
 139
 140 struct compress_types {
 141         const char *flag;       /* Flag in configuration file */
 142         const char *suffix;     /* Compression suffix */
 143         const char *path;       /* Path to compression program */
 144 };
 145
 146 const struct compress_types compress_type[COMPRESS_TYPES] = {
 147         { "", "", "" },                                 /* no compression */
 148         { "Z", COMPRESS_SUFFIX_GZ, _PATH_GZIP },        /* gzip compression */
 149         { "J", COMPRESS_SUFFIX_BZ2, _PATH_BZIP2 },      /* bzip2 compression */
 150         { "X", COMPRESS_SUFFIX_XZ, _PATH_XZ }           /* xz compression */
 151 };
 152
 153 struct conf_entry {
 154         STAILQ_ENTRY(conf_entry) cf_nextp;
 155         char *log;              /* Name of the log */
 156         char *pid_file;         /* PID file */
 157         char *r_reason;         /* The reason this file is being rotated */
 158         int firstcreate;        /* Creating log for the first time (-C). */
 159         int rotate;             /* Non-zero if this file should be rotated */
 160         int fsize;              /* size found for the log file */
 161         uid_t uid;              /* Owner of log */
 162         gid_t gid;              /* Group of log */
 163         int numlogs;            /* Number of logs to keep */
 164         int trsize;             /* Size cutoff to trigger trimming the log */
 165         int hours;              /* Hours between log trimming */
 166         struct ptime_data *trim_at;     /* Specific time to do trimming */
 167         unsigned int permissions;       /* File permissions on the log */
 168         int flags;              /* CE_BINARY */
 169         int compress;           /* Compression */
 170         int sig;                /* Signal to send */
 171         int def_cfg;            /* Using the <default> rule for this file */
 172 };
 173
 174 struct sigwork_entry {
 175         SLIST_ENTRY(sigwork_entry) sw_nextp;
 176         int      sw_signum;             /* the signal to send */
 177         int      sw_pidok;              /* true if pid value is valid */
 178         pid_t    sw_pid;                /* the process id from the PID file */
 179         const char *sw_pidtype;         /* "daemon" or "process group" */
 180         char     sw_fname[1];           /* file the PID was read from */
 181 };
 182
 183 struct zipwork_entry {
 184         SLIST_ENTRY(zipwork_entry) zw_nextp;
 185         const struct conf_entry *zw_conf;       /* for chown/perm/flag info */
 186         const struct sigwork_entry *zw_swork;   /* to know success of signal */
 187         int      zw_fsize;              /* size of the file to compress */
 188         char     zw_fname[1];           /* the file to compress */
 189 };
 190
 191 struct include_entry {
 192         STAILQ_ENTRY(include_entry) inc_nextp;
 193         const char *file;       /* Name of file to process */
 194 };
 195
 196 struct oldlog_entry {
 197         char *fname;            /* Filename of the log file */
 198         time_t t;               /* Parsed timestamp of the logfile */
 199 };
 200
 201 typedef enum {
 202         FREE_ENT, KEEP_ENT
 203 }       fk_entry;
 204
 205 STAILQ_HEAD(cflist, conf_entry);
 206 SLIST_HEAD(swlisthead, sigwork_entry) swhead = SLIST_HEAD_INITIALIZER(swhead);
 207 SLIST_HEAD(zwlisthead, zipwork_entry) zwhead = SLIST_HEAD_INITIALIZER(zwhead);
 208 STAILQ_HEAD(ilist, include_entry);
 209
 210 int dbg_at_times;               /* -D Show details of 'trim_at' code */
 211
 212 int archtodir = 0;              /* Archive old logfiles to other directory */
 213 int createlogs;                 /* Create (non-GLOB) logfiles which do not */
 214                                 /*    already exist.  1=='for entries with */
 215                                 /*    C flag', 2=='for all entries'. */
 216 int verbose = 0;                /* Print out what's going on */
 217 int needroot = 1;               /* Root privs are necessary */
 218 int noaction = 0;               /* Don't do anything, just show it */
 219 int norotate = 0;               /* Don't rotate */
 220 int nosignal;                   /* Do not send any signals */
 221 int enforcepid = 0;             /* If PID file does not exist or empty, do nothing */
 222 int force = 0;                  /* Force the trim no matter what */
 223 int rotatereq = 0;              /* -R = Always rotate the file(s) as given */
 224                                 /*    on the command (this also requires   */
 225                                 /*    that a list of files *are* given on  */
 226                                 /*    the run command). */
 227 char *requestor;                /* The name given on a -R request */
 228 char *timefnamefmt = NULL;      /* Use time based filenames instead of .0 etc */
 229 char *archdirname;              /* Directory path to old logfiles archive */
 230 char *destdir = NULL;           /* Directory to treat at root for logs */
 231 const char *conf;               /* Configuration file to use */
 232
 233 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */
 234 struct ptime_data *timenow;     /* The time to use for checking at-fields */
 235
 236 #define DAYTIME_LEN     16
 237 char daytime[DAYTIME_LEN];      /* The current time in human readable form,
 238                                  * used for rotation-tracking messages. */
 239 char hostname[MAXHOSTNAMELEN];  /* hostname */
 240
 241 const char *path_syslogpid = _PATH_SYSLOGPID;
 242
 243 static struct cflist *get_worklist(char **files);
 244 static void parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
 245                     struct conf_entry *defconf_p, struct ilist *inclist);
 246 static void add_to_queue(const char *fname, struct ilist *inclist);
 247 static char *sob(char *p);
 248 static char *son(char *p);
 249 static int isnumberstr(const char *);
 250 static int isglobstr(const char *);
 251 static char *missing_field(char *p, char *errline);
 252 static void      change_attrs(const char *, const struct conf_entry *);
 253 static const char *get_logfile_suffix(const char *logfile);
 254 static fk_entry  do_entry(struct conf_entry *);
 255 static fk_entry  do_rotate(const struct conf_entry *);
 256 static void      do_sigwork(struct sigwork_entry *);
 257 static void      do_zipwork(struct zipwork_entry *);
 258 static struct sigwork_entry *
 259                  save_sigwork(const struct conf_entry *);
 260 static struct zipwork_entry *
 261                  save_zipwork(const struct conf_entry *, const struct
 262                     sigwork_entry *, int, const char *);
 263 static void      set_swpid(struct sigwork_entry *, const struct conf_entry *);
 264 static int       sizefile(const char *);
 265 static void expand_globs(struct cflist *work_p, struct cflist *glob_p);
 266 static void free_clist(struct cflist *list);
 267 static void free_entry(struct conf_entry *ent);
 268 static struct conf_entry *init_entry(const char *fname,
 269                 struct conf_entry *src_entry);
 270 static void parse_args(int argc, char **argv);
 271 static int parse_doption(const char *doption);
 272 static void usage(void);
 273 static int log_trim(const char *logname, const struct conf_entry *log_ent);
 274 static int age_old_log(char *file);
 275 static void savelog(char *from, char *to);
 276 static void createdir(const struct conf_entry *ent, char *dirpart);
 277 static void createlog(const struct conf_entry *ent);
 278
 279 /*
 280  * All the following take a parameter of 'int', but expect values in the
 281  * range of unsigned char.  Define wrappers which take values of type 'char',
 282  * whether signed or unsigned, and ensure they end up in the right range.
 283  */
 284 #define isdigitch(Anychar) isdigit((u_char)(Anychar))
 285 #define isprintch(Anychar) isprint((u_char)(Anychar))
 286 #define isspacech(Anychar) isspace((u_char)(Anychar))
 287 #define tolowerch(Anychar) tolower((u_char)(Anychar))
 288
 289 int
 290 main(int argc, char **argv)
 291 {
 292         struct cflist *worklist;
 293         struct conf_entry *p;
 294         struct sigwork_entry *stmp;
 295         struct zipwork_entry *ztmp;
 296
 297         SLIST_INIT(&swhead);
 298         SLIST_INIT(&zwhead);
 299
 300         parse_args(argc, argv);
 301         argc -= optind;
 302         argv += optind;
 303
 304         if (needroot && getuid() && geteuid())
 305                 errx(1, "must have root privs");
 306         worklist = get_worklist(argv);
 307
 308         /*
 309          * Rotate all the files which need to be rotated.  Note that
 310          * some users have *hundreds* of entries in newsyslog.conf!
 311          */
 312         while (!STAILQ_EMPTY(worklist)) {
 313                 p = STAILQ_FIRST(worklist);
 314                 STAILQ_REMOVE_HEAD(worklist, cf_nextp);
 315                 if (do_entry(p) == FREE_ENT)
 316                         free_entry(p);
 317         }
 318
 319         /*
 320          * Send signals to any processes which need a signal to tell
 321          * them to close and re-open the log file(s) we have rotated.
 322          * Note that zipwork_entries include pointers to these
 323          * sigwork_entry's, so we can not free the entries here.
 324          */
 325         if (!SLIST_EMPTY(&swhead)) {
 326                 if (noaction || verbose)
 327                         printf("Signal all daemon process(es)...\n");
 328                 SLIST_FOREACH(stmp, &swhead, sw_nextp)
 329                         do_sigwork(stmp);
 330                 if (noaction)
 331                         printf("\tsleep 10\n");
 332                 else {
 333                         if (verbose)
 334                                 printf("Pause 10 seconds to allow daemon(s)"
 335                                     " to close log file(s)\n");
 336                         sleep(10);
 337                 }
 338         }
 339         /*
 340          * Compress all files that we're expected to compress, now
 341          * that all processes should have closed the files which
 342          * have been rotated.
 343          */
 344         if (!SLIST_EMPTY(&zwhead)) {
 345                 if (noaction || verbose)
 346                         printf("Compress all rotated log file(s)...\n");
 347                 while (!SLIST_EMPTY(&zwhead)) {
 348                         ztmp = SLIST_FIRST(&zwhead);
 349                         do_zipwork(ztmp);
 350                         SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
 351                         free(ztmp);
 352                 }
 353         }
 354         /* Now free all the sigwork entries. */
 355         while (!SLIST_EMPTY(&swhead)) {
 356                 stmp = SLIST_FIRST(&swhead);
 357                 SLIST_REMOVE_HEAD(&swhead, sw_nextp);
 358                 free(stmp);
 359         }
 360
 361         while (wait(NULL) > 0 || errno == EINTR)
 362                 ;
 363         return (0);
 364 }
 365
 366 static struct conf_entry *
 367 init_entry(const char *fname, struct conf_entry *src_entry)
 368 {
 369         struct conf_entry *tempwork;
 370
 371         if (verbose > 4)
 372                 printf("\t--> [creating entry for %s]\n", fname);
 373
 374         tempwork = malloc(sizeof(struct conf_entry));
 375         if (tempwork == NULL)
 376                 err(1, "malloc of conf_entry for %s", fname);
 377
 378         if (destdir == NULL || fname[0] != '/')
 379                 tempwork->log = strdup(fname);
 380         else
 381                 asprintf(&tempwork->log, "%s%s", destdir, fname);
 382         if (tempwork->log == NULL)
 383                 err(1, "strdup for %s", fname);
 384
 385         if (src_entry != NULL) {
 386                 tempwork->pid_file = NULL;
 387                 if (src_entry->pid_file)
 388                         tempwork->pid_file = strdup(src_entry->pid_file);
 389                 tempwork->r_reason = NULL;
 390                 tempwork->firstcreate = 0;
 391                 tempwork->rotate = 0;
 392                 tempwork->fsize = -1;
 393                 tempwork->uid = src_entry->uid;
 394                 tempwork->gid = src_entry->gid;
 395                 tempwork->numlogs = src_entry->numlogs;
 396                 tempwork->trsize = src_entry->trsize;
 397                 tempwork->hours = src_entry->hours;
 398                 tempwork->trim_at = NULL;
 399                 if (src_entry->trim_at != NULL)
 400                         tempwork->trim_at = ptime_init(src_entry->trim_at);
 401                 tempwork->permissions = src_entry->permissions;
 402                 tempwork->flags = src_entry->flags;
 403                 tempwork->compress = src_entry->compress;
 404                 tempwork->sig = src_entry->sig;
 405                 tempwork->def_cfg = src_entry->def_cfg;
 406         } else {
 407                 /* Initialize as a "do-nothing" entry */
 408                 tempwork->pid_file = NULL;
 409                 tempwork->r_reason = NULL;
 410                 tempwork->firstcreate = 0;
 411                 tempwork->rotate = 0;
 412                 tempwork->fsize = -1;
 413                 tempwork->uid = (uid_t)-1;
 414                 tempwork->gid = (gid_t)-1;
 415                 tempwork->numlogs = 1;
 416                 tempwork->trsize = -1;
 417                 tempwork->hours = -1;
 418                 tempwork->trim_at = NULL;
 419                 tempwork->permissions = 0;
 420                 tempwork->flags = 0;
 421                 tempwork->compress = COMPRESS_NONE;
 422                 tempwork->sig = SIGHUP;
 423                 tempwork->def_cfg = 0;
 424         }
 425
 426         return (tempwork);
 427 }
 428
 429 static void
 430 free_entry(struct conf_entry *ent)
 431 {
 432
 433         if (ent == NULL)
 434                 return;
 435
 436         if (ent->log != NULL) {
 437                 if (verbose > 4)
 438                         printf("\t--> [freeing entry for %s]\n", ent->log);
 439                 free(ent->log);
 440                 ent->log = NULL;
 441         }
 442
 443         if (ent->pid_file != NULL) {
 444                 free(ent->pid_file);
 445                 ent->pid_file = NULL;
 446         }
 447
 448         if (ent->r_reason != NULL) {
 449                 free(ent->r_reason);
 450                 ent->r_reason = NULL;
 451         }
 452
 453         if (ent->trim_at != NULL) {
 454                 ptime_free(ent->trim_at);
 455                 ent->trim_at = NULL;
 456         }
 457
 458         free(ent);
 459 }
 460
 461 static void
 462 free_clist(struct cflist *list)
 463 {
 464         struct conf_entry *ent;
 465
 466         while (!STAILQ_EMPTY(list)) {
 467                 ent = STAILQ_FIRST(list);
 468                 STAILQ_REMOVE_HEAD(list, cf_nextp);
 469                 free_entry(ent);
 470         }
 471
 472         free(list);
 473         list = NULL;
 474 }
 475
 476 static fk_entry
 477 do_entry(struct conf_entry * ent)
 478 {
 479 #define REASON_MAX      80
 480         int modtime;
 481         fk_entry free_or_keep;
 482         double diffsecs;
 483         char temp_reason[REASON_MAX];
 484
 485         free_or_keep = FREE_ENT;
 486         if (verbose)
 487                 printf("%s <%d%s>: ", ent->log, ent->numlogs,
 488                     compress_type[ent->compress].flag);
 489         ent->fsize = sizefile(ent->log);
 490         modtime = age_old_log(ent->log);
 491         ent->rotate = 0;
 492         ent->firstcreate = 0;
 493         if (ent->fsize < 0) {
 494                 /*
 495                  * If either the C flag or the -C option was specified,
 496                  * and if we won't be creating the file, then have the
 497                  * verbose message include a hint as to why the file
 498                  * will not be created.
 499                  */
 500                 temp_reason[0] = '\0';
 501                 if (createlogs > 1)
 502                         ent->firstcreate = 1;
 503                 else if ((ent->flags & CE_CREATE) && createlogs)
 504                         ent->firstcreate = 1;
 505                 else if (ent->flags & CE_CREATE)
 506                         strlcpy(temp_reason, " (no -C option)", REASON_MAX);
 507                 else if (createlogs)
 508                         strlcpy(temp_reason, " (no C flag)", REASON_MAX);
 509
 510                 if (ent->firstcreate) {
 511                         if (verbose)
 512                                 printf("does not exist -> will create.\n");
 513                         createlog(ent);
 514                 } else if (verbose) {
 515                         printf("does not exist, skipped%s.\n", temp_reason);
 516                 }
 517         } else {
 518                 if (ent->flags & CE_TRIMAT && !force && !rotatereq) {
 519                         diffsecs = ptimeget_diff(timenow, ent->trim_at);
 520                         if (diffsecs < 0.0) {
 521                                 /* trim_at is some time in the future. */
 522                                 if (verbose) {
 523                                         ptime_adjust4dst(ent->trim_at,
 524                                             timenow);
 525                                         printf("--> will trim at %s",
 526                                             ptimeget_ctime(ent->trim_at));
 527                                 }
 528                                 return (free_or_keep);
 529                         } else if (diffsecs >= 3600.0) {
 530                                 /*
 531                                  * trim_at is more than an hour in the past,
 532                                  * so find the next valid trim_at time, and
 533                                  * tell the user what that will be.
 534                                  */
 535                                 if (verbose && dbg_at_times)
 536                                         printf("\n\t--> prev trim at %s\t",
 537                                             ptimeget_ctime(ent->trim_at));
 538                                 if (verbose) {
 539                                         ptimeset_nxtime(ent->trim_at);
 540                                         printf("--> will trim at %s",
 541                                             ptimeget_ctime(ent->trim_at));
 542                                 }
 543                                 return (free_or_keep);
 544                         } else if (verbose && noaction && dbg_at_times) {
 545                                 /*
 546                                  * If we are just debugging at-times, then
 547                                  * a detailed message is helpful.  Also
 548                                  * skip "doing" any commands, since they
 549                                  * would all be turned off by no-action.
 550                                  */
 551                                 printf("\n\t--> timematch at %s",
 552                                     ptimeget_ctime(ent->trim_at));
 553                                 return (free_or_keep);
 554                         } else if (verbose && ent->hours <= 0) {
 555                                 printf("--> time is up\n");
 556                         }
 557                 }
 558                 if (verbose && (ent->trsize > 0))
 559                         printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
 560                 if (verbose && (ent->hours > 0))
 561                         printf(" age (hr): %d [%d] ", modtime, ent->hours);
 562
 563                 /*
 564                  * Figure out if this logfile needs to be rotated.
 565                  */
 566                 temp_reason[0] = '\0';
 567                 if (rotatereq) {
 568                         ent->rotate = 1;
 569                         snprintf(temp_reason, REASON_MAX, " due to -R from %s",
 570                             requestor);
 571                 } else if (force) {
 572                         ent->rotate = 1;
 573                         snprintf(temp_reason, REASON_MAX, " due to -F request");
 574                 } else if ((ent->trsize > 0) && (ent->fsize >= ent->trsize)) {
 575                         ent->rotate = 1;
 576                         snprintf(temp_reason, REASON_MAX, " due to size>%dK",
 577                             ent->trsize);
 578                 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
 579                         ent->rotate = 1;
 580                 } else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
 581                     (modtime < 0))) {
 582                         ent->rotate = 1;
 583                 }
 584
 585                 /*
 586                  * If the file needs to be rotated, then rotate it.
 587                  */
 588                 if (ent->rotate && !norotate) {
 589                         if (temp_reason[0] != '\0')
 590                                 ent->r_reason = strdup(temp_reason);
 591                         if (verbose)
 592                                 printf("--> trimming log....\n");
 593                         if (noaction && !verbose)
 594                                 printf("%s <%d%s>: trimming\n", ent->log,
 595                                     ent->numlogs,
 596                                     compress_type[ent->compress].flag);
 597                         free_or_keep = do_rotate(ent);
 598                 } else {
 599                         if (verbose)
 600                                 printf("--> skipping\n");
 601                 }
 602         }
 603         return (free_or_keep);
 604 #undef REASON_MAX
 605 }
 606
 607 static void
 608 parse_args(int argc, char **argv)
 609 {
 610         int ch;
 611         char *p;
 612
 613         timenow = ptime_init(NULL);
 614         ptimeset_time(timenow, time(NULL));
 615         strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN);
 616
 617         /* Let's get our hostname */
 618         gethostname(hostname, sizeof(hostname));
 619
 620         /* Truncate domain */
 621         if ((p = strchr(hostname, '.')) != NULL)
 622                 *p = '\0';
 623
 624         /* Parse command line options. */
 625         while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1)
 626                 switch (ch) {
 627                 case 'a':
 628                         archtodir++;
 629                         archdirname = optarg;
 630                         break;
 631                 case 'd':
 632                         destdir = optarg;
 633                         break;
 634                 case 'f':
 635                         conf = optarg;
 636                         break;
 637                 case 'n':
 638                         noaction++;
 639                         break;
 640                 case 'r':
 641                         needroot = 0;
 642                         break;
 643                 case 's':
 644                         nosignal = 1;
 645                         break;
 646                 case 't':
 647                         if (optarg[0] == '\0' ||
 648                             strcmp(optarg, "DEFAULT") == 0)
 649                                 timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT);
 650                         else
 651                                 timefnamefmt = strdup(optarg);
 652                         break;
 653                 case 'v':
 654                         verbose++;
 655                         break;
 656                 case 'C':
 657                         /* Useful for things like rc.diskless... */
 658                         createlogs++;
 659                         break;
 660                 case 'D':
 661                         /*
 662                          * Set some debugging option.  The specific option
 663                          * depends on the value of optarg.  These options
 664                          * may come and go without notice or documentation.
 665                          */
 666                         if (parse_doption(optarg))
 667                                 break;
 668                         usage();
 669                         /* NOTREACHED */
 670                 case 'F':
 671                         force++;
 672                         break;
 673                 case 'N':
 674                         norotate++;
 675                         break;
 676                 case 'P':
 677                         enforcepid++;
 678                         break;
 679                 case 'R':
 680                         rotatereq++;
 681                         requestor = strdup(optarg);
 682                         break;
 683                 case 'S':
 684                         path_syslogpid = optarg;
 685                         break;
 686                 case 'm':       /* Used by OpenBSD for "monitor mode" */
 687                 default:
 688                         usage();
 689                         /* NOTREACHED */
 690                 }
 691
 692         if (force && norotate) {
 693                 warnx("Only one of -F and -N may be specified.");
 694                 usage();
 695                 /* NOTREACHED */
 696         }
 697
 698         if (rotatereq) {
 699                 if (optind == argc) {
 700                         warnx("At least one filename must be given when -R is specified.");
 701                         usage();
 702                         /* NOTREACHED */
 703                 }
 704                 /* Make sure "requestor" value is safe for a syslog message. */
 705                 for (p = requestor; *p != '\0'; p++) {
 706                         if (!isprintch(*p) && (*p != '\t'))
 707                                 *p = '.';
 708                 }
 709         }
 710
 711         if (dbg_timenow) {
 712                 /*
 713                  * Note that the 'daytime' variable is not changed.
 714                  * That is only used in messages that track when a
 715                  * logfile is rotated, and if a file *is* rotated,
 716                  * then it will still rotated at the "real now" time.
 717                  */
 718                 ptime_free(timenow);
 719                 timenow = dbg_timenow;
 720                 fprintf(stderr, "Debug: Running as if TimeNow is %s",
 721                     ptimeget_ctime(dbg_timenow));
 722         }
 723
 724 }
 725
 726 /*
 727  * These debugging options are mainly meant for developer use, such
 728  * as writing regression-tests.  They would not be needed by users
 729  * during normal operation of newsyslog...
 730  */
 731 static int
 732 parse_doption(const char *doption)
 733 {
 734         const char TN[] = "TN=";
 735         int res;
 736
 737         if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
 738                 /*
 739                  * The "TimeNow" debugging option.  This might be off
 740                  * by an hour when crossing a timezone change.
 741                  */
 742                 dbg_timenow = ptime_init(NULL);
 743                 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
 744                     time(NULL), doption + sizeof(TN) - 1);
 745                 if (res == -2) {
 746                         warnx("Non-existent time specified on -D %s", doption);
 747                         return (0);                     /* failure */
 748                 } else if (res < 0) {
 749                         warnx("Malformed time given on -D %s", doption);
 750                         return (0);                     /* failure */
 751                 }
 752                 return (1);                     /* successfully parsed */
 753
 754         }
 755
 756         if (strcmp(doption, "ats") == 0) {
 757                 dbg_at_times++;
 758                 return (1);                     /* successfully parsed */
 759         }
 760
 761         /* XXX - This check could probably be dropped. */
 762         if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder")
 763             == 0)) {
 764                 warnx("NOTE: newsyslog always uses 'neworder'.");
 765                 return (1);                     /* successfully parsed */
 766         }
 767
 768         warnx("Unknown -D (debug) option: '%s'", doption);
 769         return (0);                             /* failure */
 770 }
 771
 772 static void
 773 usage(void)
 774 {
 775
 776         fprintf(stderr,
 777             "usage: newsyslog [-CFNnrsv] [-a directory] [-d directory] [-f config-file]\n"
 778             "                 [-S pidfile] [-t timefmt ] [ [-R requestor] filename ... ]\n");
 779         exit(1);
 780 }
 781
 782 /*
 783  * Parse a configuration file and return a linked list of all the logs
 784  * which should be processed.
 785  */
 786 static struct cflist *
 787 get_worklist(char **files)
 788 {
 789         FILE *f;
 790         char **given;
 791         struct cflist *cmdlist, *filelist, *globlist;
 792         struct conf_entry *defconf, *dupent, *ent;
 793         struct ilist inclist;
 794         struct include_entry *inc;
 795         int gmatch, fnres;
 796
 797         defconf = NULL;
 798         STAILQ_INIT(&inclist);
 799
 800         filelist = malloc(sizeof(struct cflist));
 801         if (filelist == NULL)
 802                 err(1, "malloc of filelist");
 803         STAILQ_INIT(filelist);
 804         globlist = malloc(sizeof(struct cflist));
 805         if (globlist == NULL)
 806                 err(1, "malloc of globlist");
 807         STAILQ_INIT(globlist);
 808
 809         inc = malloc(sizeof(struct include_entry));
 810         if (inc == NULL)
 811                 err(1, "malloc of inc");
 812         inc->file = conf;
 813         if (inc->file == NULL)
 814                 inc->file = _PATH_CONF;
 815         STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp);
 816
 817         STAILQ_FOREACH(inc, &inclist, inc_nextp) {
 818                 if (strcmp(inc->file, "-") != 0)
 819                         f = fopen(inc->file, "r");
 820                 else {
 821                         f = stdin;
 822                         inc->file = "<stdin>";
 823                 }
 824                 if (!f)
 825                         err(1, "%s", inc->file);
 826
 827                 if (verbose)
 828                         printf("Processing %s\n", inc->file);
 829                 parse_file(f, filelist, globlist, defconf, &inclist);
 830                 fclose(f);
 831         }
 832
 833         /*
 834          * All config-file information has been read in and turned into
 835          * a filelist and a globlist.  If there were no specific files
 836          * given on the run command, then the only thing left to do is to
 837          * call a routine which finds all files matched by the globlist
 838          * and adds them to the filelist.  Then return the worklist.
 839          */
 840         if (*files == NULL) {
 841                 expand_globs(filelist, globlist);
 842                 free_clist(globlist);
 843                 if (defconf != NULL)
 844                         free_entry(defconf);
 845                 return (filelist);
 846                 /* NOTREACHED */
 847         }
 848
 849         /*
 850          * If newsyslog was given a specific list of files to process,
 851          * it may be that some of those files were not listed in any
 852          * config file.  Those unlisted files should get the default
 853          * rotation action.  First, create the default-rotation action
 854          * if none was found in a system config file.
 855          */
 856         if (defconf == NULL) {
 857                 defconf = init_entry(DEFAULT_MARKER, NULL);
 858                 defconf->numlogs = 3;
 859                 defconf->trsize = 50;
 860                 defconf->permissions = S_IRUSR|S_IWUSR;
 861         }
 862
 863         /*
 864          * If newsyslog was run with a list of specific filenames,
 865          * then create a new worklist which has only those files in
 866          * it, picking up the rotation-rules for those files from
 867          * the original filelist.
 868          *
 869          * XXX - Note that this will copy multiple rules for a single
 870          *      logfile, if multiple entries are an exact match for
 871          *      that file.  That matches the historic behavior, but do
 872          *      we want to continue to allow it?  If so, it should
 873          *      probably be handled more intelligently.
 874          */
 875         cmdlist = malloc(sizeof(struct cflist));
 876         if (cmdlist == NULL)
 877                 err(1, "malloc of cmdlist");
 878         STAILQ_INIT(cmdlist);
 879
 880         for (given = files; *given; ++given) {
 881                 /*
 882                  * First try to find exact-matches for this given file.
 883                  */
 884                 gmatch = 0;
 885                 STAILQ_FOREACH(ent, filelist, cf_nextp) {
 886                         if (strcmp(ent->log, *given) == 0) {
 887                                 gmatch++;
 888                                 dupent = init_entry(*given, ent);
 889                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 890                         }
 891                 }
 892                 if (gmatch) {
 893                         if (verbose > 2)
 894                                 printf("\t+ Matched entry %s\n", *given);
 895                         continue;
 896                 }
 897
 898                 /*
 899                  * There was no exact-match for this given file, so look
 900                  * for a "glob" entry which does match.
 901                  */
 902                 gmatch = 0;
 903                 if (verbose > 2 && globlist != NULL)
 904                         printf("\t+ Checking globs for %s\n", *given);
 905                 STAILQ_FOREACH(ent, globlist, cf_nextp) {
 906                         fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
 907                         if (verbose > 2)
 908                                 printf("\t+    = %d for pattern %s\n", fnres,
 909                                     ent->log);
 910                         if (fnres == 0) {
 911                                 gmatch++;
 912                                 dupent = init_entry(*given, ent);
 913                                 /* This new entry is not a glob! */
 914                                 dupent->flags &= ~CE_GLOB;
 915                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 916                                 /* Only allow a match to one glob-entry */
 917                                 break;
 918                         }
 919                 }
 920                 if (gmatch) {
 921                         if (verbose > 2)
 922                                 printf("\t+ Matched %s via %s\n", *given,
 923                                     ent->log);
 924                         continue;
 925                 }
 926
 927                 /*
 928                  * This given file was not found in any config file, so
 929                  * add a worklist item based on the default entry.
 930                  */
 931                 if (verbose > 2)
 932                         printf("\t+ No entry matched %s  (will use %s)\n",
 933                             *given, DEFAULT_MARKER);
 934                 dupent = init_entry(*given, defconf);
 935                 /* Mark that it was *not* found in a config file */
 936                 dupent->def_cfg = 1;
 937                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 938         }
 939
 940         /*
 941          * Free all the entries in the original work list, the list of
 942          * glob entries, and the default entry.
 943          */
 944         free_clist(filelist);
 945         free_clist(globlist);
 946         free_entry(defconf);
 947
 948         /* And finally, return a worklist which matches the given files. */
 949         return (cmdlist);
 950 }
 951
 952 /*
 953  * Expand the list of entries with filename patterns, and add all files
 954  * which match those glob-entries onto the worklist.
 955  */
 956 static void
 957 expand_globs(struct cflist *work_p, struct cflist *glob_p)
 958 {
 959         int gmatch, gres;
 960         size_t i;
 961         char *mfname;
 962         struct conf_entry *dupent, *ent, *globent;
 963         glob_t pglob;
 964         struct stat st_fm;
 965
 966         /*
 967          * The worklist contains all fully-specified (non-GLOB) names.
 968          *
 969          * Now expand the list of filename-pattern (GLOB) entries into
 970          * a second list, which (by definition) will only match files
 971          * that already exist.  Do not add a glob-related entry for any
 972          * file which already exists in the fully-specified list.
 973          */
 974         STAILQ_FOREACH(globent, glob_p, cf_nextp) {
 975                 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
 976                 if (gres != 0) {
 977                         warn("cannot expand pattern (%d): %s", gres,
 978                             globent->log);
 979                         continue;
 980                 }
 981
 982                 if (verbose > 2)
 983                         printf("\t+ Expanding pattern %s\n", globent->log);
 984                 for (i = 0; i < pglob.gl_matchc; i++) {
 985                         mfname = pglob.gl_pathv[i];
 986
 987                         /* See if this file already has a specific entry. */
 988                         gmatch = 0;
 989                         STAILQ_FOREACH(ent, work_p, cf_nextp) {
 990                                 if (strcmp(mfname, ent->log) == 0) {
 991                                         gmatch++;
 992                                         break;
 993                                 }
 994                         }
 995                         if (gmatch)
 996                                 continue;
 997
 998                         /* Make sure the named matched is a file. */
 999                         gres = lstat(mfname, &st_fm);
1000                         if (gres != 0) {
1001                                 /* Error on a file that glob() matched?!? */
1002                                 warn("Skipping %s - lstat() error", mfname);
1003                                 continue;
1004                         }
1005                         if (!S_ISREG(st_fm.st_mode)) {
1006                                 /* We only rotate files! */
1007                                 if (verbose > 2)
1008                                         printf("\t+  . skipping %s (!file)\n",
1009                                             mfname);
1010                                 continue;
1011                         }
1012
1013                         if (verbose > 2)
1014                                 printf("\t+  . add file %s\n", mfname);
1015                         dupent = init_entry(mfname, globent);
1016                         /* This new entry is not a glob! */
1017                         dupent->flags &= ~CE_GLOB;
1018
1019                         /* Add to the worklist. */
1020                         STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp);
1021                 }
1022                 globfree(&pglob);
1023                 if (verbose > 2)
1024                         printf("\t+ Done with pattern %s\n", globent->log);
1025         }
1026 }
1027
1028 /*
1029  * Parse a configuration file and update a linked list of all the logs to
1030  * process.
1031  */
1032 static void
1033 parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
1034     struct conf_entry *defconf_p, struct ilist *inclist)
1035 {
1036         char line[BUFSIZ], *parse, *q;
1037         char *cp, *errline, *group;
1038         struct conf_entry *working;
1039         struct passwd *pwd;
1040         struct group *grp;
1041         glob_t pglob;
1042         int eol, ptm_opts, res, special;
1043         size_t i;
1044
1045         errline = NULL;
1046         while (fgets(line, BUFSIZ, cf)) {
1047                 if ((line[0] == '\n') || (line[0] == '#') ||
1048                     (strlen(line) == 0))
1049                         continue;
1050                 if (errline != NULL)
1051                         free(errline);
1052                 errline = strdup(line);
1053                 for (cp = line + 1; *cp != '\0'; cp++) {
1054                         if (*cp != '#')
1055                                 continue;
1056                         if (*(cp - 1) == '\\') {
1057                                 strcpy(cp - 1, cp);
1058                                 cp--;
1059                                 continue;
1060                         }
1061                         *cp = '\0';
1062                         break;
1063                 }
1064
1065                 q = parse = missing_field(sob(line), errline);
1066                 parse = son(line);
1067                 if (!*parse)
1068                         errx(1, "malformed line (missing fields):\n%s",
1069                             errline);
1070                 *parse = '\0';
1071
1072                 /*
1073                  * Allow people to set debug options via the config file.
1074                  * (NOTE: debug options are undocumented, and may disappear
1075                  * at any time, etc).
1076                  */
1077                 if (strcasecmp(DEBUG_MARKER, q) == 0) {
1078                         q = parse = missing_field(sob(++parse), errline);
1079                         parse = son(parse);
1080                         if (!*parse)
1081                                 warnx("debug line specifies no option:\n%s",
1082                                     errline);
1083                         else {
1084                                 *parse = '\0';
1085                                 parse_doption(q);
1086                         }
1087                         continue;
1088                 } else if (strcasecmp(INCLUDE_MARKER, q) == 0) {
1089                         if (verbose)
1090                                 printf("Found: %s", errline);
1091                         q = parse = missing_field(sob(++parse), errline);
1092                         parse = son(parse);
1093                         if (!*parse) {
1094                                 warnx("include line missing argument:\n%s",
1095                                     errline);
1096                                 continue;
1097                         }
1098
1099                         *parse = '\0';
1100
1101                         if (isglobstr(q)) {
1102                                 res = glob(q, GLOB_NOCHECK, NULL, &pglob);
1103                                 if (res != 0) {
1104                                         warn("cannot expand pattern (%d): %s",
1105                                             res, q);
1106                                         continue;
1107                                 }
1108
1109                                 if (verbose > 2)
1110                                         printf("\t+ Expanding pattern %s\n", q);
1111
1112                                 for (i = 0; i < pglob.gl_matchc; i++)
1113                                         add_to_queue(pglob.gl_pathv[i],
1114                                             inclist);
1115                                 globfree(&pglob);
1116                         } else
1117                                 add_to_queue(q, inclist);
1118                         continue;
1119                 }
1120
1121                 special = 0;
1122                 working = init_entry(q, NULL);
1123                 if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1124                         special = 1;
1125                         if (defconf_p != NULL) {
1126                                 warnx("Ignoring duplicate entry for %s!", q);
1127                                 free_entry(working);
1128                                 continue;
1129                         }
1130                         defconf_p = working;
1131                 }
1132
1133                 q = parse = missing_field(sob(++parse), errline);
1134                 parse = son(parse);
1135                 if (!*parse)
1136                         errx(1, "malformed line (missing fields):\n%s",
1137                             errline);
1138                 *parse = '\0';
1139                 if ((group = strchr(q, ':')) != NULL ||
1140                     (group = strrchr(q, '.')) != NULL) {
1141                         *group++ = '\0';
1142                         if (*q) {
1143                                 if (!(isnumberstr(q))) {
1144                                         if ((pwd = getpwnam(q)) == NULL)
1145                                                 errx(1,
1146                                      "error in config file; unknown user:\n%s",
1147                                                     errline);
1148                                         working->uid = pwd->pw_uid;
1149                                 } else
1150                                         working->uid = atoi(q);
1151                         } else
1152                                 working->uid = (uid_t)-1;
1153
1154                         q = group;
1155                         if (*q) {
1156                                 if (!(isnumberstr(q))) {
1157                                         if ((grp = getgrnam(q)) == NULL)
1158                                                 errx(1,
1159                                     "error in config file; unknown group:\n%s",
1160                                                     errline);
1161                                         working->gid = grp->gr_gid;
1162                                 } else
1163                                         working->gid = atoi(q);
1164                         } else
1165                                 working->gid = (gid_t)-1;
1166
1167                         q = parse = missing_field(sob(++parse), errline);
1168                         parse = son(parse);
1169                         if (!*parse)
1170                                 errx(1, "malformed line (missing fields):\n%s",
1171                                     errline);
1172                         *parse = '\0';
1173                 } else {
1174                         working->uid = (uid_t)-1;
1175                         working->gid = (gid_t)-1;
1176                 }
1177
1178                 if (!sscanf(q, "%o", &working->permissions))
1179                         errx(1, "error in config file; bad permissions:\n%s",
1180                             errline);
1181
1182                 q = parse = missing_field(sob(++parse), errline);
1183                 parse = son(parse);
1184                 if (!*parse)
1185                         errx(1, "malformed line (missing fields):\n%s",
1186                             errline);
1187                 *parse = '\0';
1188                 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1189                         errx(1, "error in config file; bad value for count of logs to save:\n%s",
1190                             errline);
1191
1192                 q = parse = missing_field(sob(++parse), errline);
1193                 parse = son(parse);
1194                 if (!*parse)
1195                         errx(1, "malformed line (missing fields):\n%s",
1196                             errline);
1197                 *parse = '\0';
1198                 if (isdigitch(*q))
1199                         working->trsize = atoi(q);
1200                 else if (strcmp(q, "*") == 0)
1201                         working->trsize = -1;
1202                 else {
1203                         warnx("Invalid value of '%s' for 'size' in line:\n%s",
1204                             q, errline);
1205                         working->trsize = -1;
1206                 }
1207
1208                 working->flags = 0;
1209                 working->compress = COMPRESS_NONE;
1210                 q = parse = missing_field(sob(++parse), errline);
1211                 parse = son(parse);
1212                 eol = !*parse;
1213                 *parse = '\0';
1214                 {
1215                         char *ep;
1216                         u_long ul;
1217
1218                         ul = strtoul(q, &ep, 10);
1219                         if (ep == q)
1220                                 working->hours = 0;
1221                         else if (*ep == '*')
1222                                 working->hours = -1;
1223                         else if (ul > INT_MAX)
1224                                 errx(1, "interval is too large:\n%s", errline);
1225                         else
1226                                 working->hours = ul;
1227
1228                         if (*ep == '\0' || strcmp(ep, "*") == 0)
1229                                 goto no_trimat;
1230                         if (*ep != '@' && *ep != '$')
1231                                 errx(1, "malformed interval/at:\n%s", errline);
1232
1233                         working->flags |= CE_TRIMAT;
1234                         working->trim_at = ptime_init(NULL);
1235                         ptm_opts = PTM_PARSE_ISO8601;
1236                         if (*ep == '$')
1237                                 ptm_opts = PTM_PARSE_DWM;
1238                         ptm_opts |= PTM_PARSE_MATCHDOM;
1239                         res = ptime_relparse(working->trim_at, ptm_opts,
1240                             ptimeget_secs(timenow), ep + 1);
1241                         if (res == -2)
1242                                 errx(1, "nonexistent time for 'at' value:\n%s",
1243                                     errline);
1244                         else if (res < 0)
1245                                 errx(1, "malformed 'at' value:\n%s", errline);
1246                 }
1247 no_trimat:
1248
1249                 if (eol)
1250                         q = NULL;
1251                 else {
1252                         q = parse = sob(++parse);       /* Optional field */
1253                         parse = son(parse);
1254                         if (!*parse)
1255                                 eol = 1;
1256                         *parse = '\0';
1257                 }
1258
1259                 for (; q && *q && !isspacech(*q); q++) {
1260                         switch (tolowerch(*q)) {
1261                         case 'b':
1262                                 working->flags |= CE_BINARY;
1263                                 break;
1264                         case 'c':
1265                                 /*
1266                                  * XXX -        Ick! Ugly! Remove ASAP!
1267                                  * We want `c' and `C' for "create".  But we
1268                                  * will temporarily treat `c' as `g', because
1269                                  * FreeBSD releases <= 4.8 have a typo of
1270                                  * checking  ('G' || 'c')  for CE_GLOB.
1271                                  */
1272                                 if (*q == 'c') {
1273                                         warnx("Assuming 'g' for 'c' in flags for line:\n%s",
1274                                             errline);
1275                                         warnx("The 'c' flag will eventually mean 'CREATE'");
1276                                         working->flags |= CE_GLOB;
1277                                         break;
1278                                 }
1279                                 working->flags |= CE_CREATE;
1280                                 break;
1281                         case 'd':
1282                                 working->flags |= CE_NODUMP;
1283                                 break;
1284                         case 'g':
1285                                 working->flags |= CE_GLOB;
1286                                 break;
1287                         case 'j':
1288                                 working->compress = COMPRESS_BZIP2;
1289                                 break;
1290                         case 'n':
1291                                 working->flags |= CE_NOSIGNAL;
1292                                 break;
1293                         case 'u':
1294                                 working->flags |= CE_SIGNALGROUP;
1295                                 break;
1296                         case 'w':
1297                                 /* Depreciated flag - keep for compatibility purposes */
1298                                 break;
1299                         case 'x':
1300                                 working->compress = COMPRESS_XZ;
1301                                 break;
1302                         case 'z':
1303                                 working->compress = COMPRESS_GZIP;
1304                                 break;
1305                         case '-':
1306                                 break;
1307                         case 'f':       /* Used by OpenBSD for "CE_FOLLOW" */
1308                         case 'm':       /* Used by OpenBSD for "CE_MONITOR" */
1309                         case 'p':       /* Used by NetBSD  for "CE_PLAIN0" */
1310                         default:
1311                                 errx(1, "illegal flag in config file -- %c",
1312                                     *q);
1313                         }
1314                 }
1315
1316                 if (eol)
1317                         q = NULL;
1318                 else {
1319                         q = parse = sob(++parse);       /* Optional field */
1320                         parse = son(parse);
1321                         if (!*parse)
1322                                 eol = 1;
1323                         *parse = '\0';
1324                 }
1325
1326                 working->pid_file = NULL;
1327                 if (q && *q) {
1328                         if (*q == '/')
1329                                 working->pid_file = strdup(q);
1330                         else if (isdigit(*q))
1331                                 goto got_sig;
1332                         else
1333                                 errx(1,
1334                         "illegal pid file or signal number in config file:\n%s",
1335                                     errline);
1336                 }
1337                 if (eol)
1338                         q = NULL;
1339                 else {
1340                         q = parse = sob(++parse);       /* Optional field */
1341                         *(parse = son(parse)) = '\0';
1342                 }
1343
1344                 working->sig = SIGHUP;
1345                 if (q && *q) {
1346                         if (isdigit(*q)) {
1347                 got_sig:
1348                                 working->sig = atoi(q);
1349                         } else {
1350                 err_sig:
1351                                 errx(1,
1352                                     "illegal signal number in config file:\n%s",
1353                                     errline);
1354                         }
1355                         if (working->sig < 1 || working->sig >= NSIG)
1356                                 goto err_sig;
1357                 }
1358
1359                 /*
1360                  * Finish figuring out what pid-file to use (if any) in
1361                  * later processing if this logfile needs to be rotated.
1362                  */
1363                 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1364                         /*
1365                          * This config-entry specified 'n' for nosignal,
1366                          * see if it also specified an explicit pid_file.
1367                          * This would be a pretty pointless combination.
1368                          */
1369                         if (working->pid_file != NULL) {
1370                                 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1371                                     working->pid_file, errline);
1372                                 free(working->pid_file);
1373                                 working->pid_file = NULL;
1374                         }
1375                 } else if (working->pid_file == NULL) {
1376                         /*
1377                          * This entry did not specify the 'n' flag, which
1378                          * means it should signal syslogd unless it had
1379                          * specified some other pid-file (and obviously the
1380                          * syslog pid-file will not be for a process-group).
1381                          * Also, we should only try to notify syslog if we
1382                          * are root.
1383                          */
1384                         if (working->flags & CE_SIGNALGROUP) {
1385                                 warnx("Ignoring flag 'U' in line:\n%s",
1386                                     errline);
1387                                 working->flags &= ~CE_SIGNALGROUP;
1388                         }
1389                         if (needroot)
1390                                 working->pid_file = strdup(path_syslogpid);
1391                 }
1392
1393                 /*
1394                  * Add this entry to the appropriate list of entries, unless
1395                  * it was some kind of special entry (eg: <default>).
1396                  */
1397                 if (special) {
1398                         ;                       /* Do not add to any list */
1399                 } else if (working->flags & CE_GLOB) {
1400                         STAILQ_INSERT_TAIL(glob_p, working, cf_nextp);
1401                 } else {
1402                         STAILQ_INSERT_TAIL(work_p, working, cf_nextp);
1403                 }
1404         }
1405         if (errline != NULL)
1406                 free(errline);
1407 }
1408
1409 static char *
1410 missing_field(char *p, char *errline)
1411 {
1412
1413         if (!p || !*p)
1414                 errx(1, "missing field in config file:\n%s", errline);
1415         return (p);
1416 }
1417
1418 /*
1419  * In our sort we return it in the reverse of what qsort normally
1420  * would do, as we want the newest files first.  If we have two
1421  * entries with the same time we don't really care about order.
1422  *
1423  * Support function for qsort() in delete_oldest_timelog().
1424  */
1425 static int
1426 oldlog_entry_compare(const void *a, const void *b)
1427 {
1428         const struct oldlog_entry *ola = a, *olb = b;
1429
1430         if (ola->t > olb->t)
1431                 return (-1);
1432         else if (ola->t < olb->t)
1433                 return (1);
1434         else
1435                 return (0);
1436 }
1437
1438 /*
1439  * Delete the oldest logfiles, when using time based filenames.
1440  */
1441 static void
1442 delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
1443 {
1444         char *logfname, *s, *dir, errbuf[80];
1445         int dirfd, i, logcnt, max_logcnt, valid;
1446         struct oldlog_entry *oldlogs;
1447         size_t logfname_len;
1448         struct dirent *dp;
1449         const char *cdir;
1450         struct tm tm;
1451         DIR *dirp;
1452
1453         oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry));
1454         max_logcnt = MAX_OLDLOGS;
1455         logcnt = 0;
1456
1457         if (archive_dir != NULL && archive_dir[0] != '\0')
1458                 cdir = archive_dir;
1459         else
1460                 if ((cdir = dirname(ent->log)) == NULL)
1461                         err(1, "dirname()");
1462         if ((dir = strdup(cdir)) == NULL)
1463                 err(1, "strdup()");
1464
1465         if ((s = basename(ent->log)) == NULL)
1466                 err(1, "basename()");
1467         if ((logfname = strdup(s)) == NULL)
1468                 err(1, "strdup()");
1469         logfname_len = strlen(logfname);
1470         if (strcmp(logfname, "/") == 0)
1471                 errx(1, "Invalid log filename - became '/'");
1472
1473         if (verbose > 2)
1474                 printf("Searching for old logs in %s\n", dir);
1475
1476         /* First we create a 'list' of all archived logfiles */
1477         if ((dirp = opendir(dir)) == NULL)
1478                 err(1, "Cannot open log directory '%s'", dir);
1479         dirfd = dirfd(dirp);
1480         while ((dp = readdir(dirp)) != NULL) {
1481                 if (dp->d_type != DT_REG)
1482                         continue;
1483
1484                 /* Ignore everything but files with our logfile prefix */
1485                 if (strncmp(dp->d_name, logfname, logfname_len) != 0)
1486                         continue;
1487                 /* Ignore the actual non-rotated logfile */
1488                 if (dp->d_namlen == logfname_len)
1489                         continue;
1490                 /*
1491                  * Make sure we created have found a logfile, so the
1492                  * postfix is valid, IE format is: '.<time>(.[bg]z)?'.
1493                  */
1494                 if (dp->d_name[logfname_len] != '.') {
1495                         if (verbose)
1496                                 printf("Ignoring %s which has unexpected "
1497                                     "extension '%s'\n", dp->d_name,
1498                                     &dp->d_name[logfname_len]);
1499                         continue;
1500                 }
1501                 if ((s = strptime(&dp->d_name[logfname_len + 1],
1502                             timefnamefmt, &tm)) == NULL) {
1503                         /*
1504                          * We could special case "old" sequentially
1505                          * named logfiles here, but we do not as that
1506                          * would require special handling to decide
1507                          * which one was the oldest compared to "new"
1508                          * time based logfiles.
1509                          */
1510                         if (verbose)
1511                                 printf("Ignoring %s which does not "
1512                                     "match time format\n", dp->d_name);
1513                         continue;
1514                 }
1515
1516                 for (int c = 0; c < COMPRESS_TYPES; c++)
1517                         if (strcmp(s, compress_type[c].suffix) == 0)
1518                                 valid = 1;
1519                 if (valid != 1) {
1520                         if (verbose)
1521                                 printf("Ignoring %s which has unexpected "
1522                                     "extension '%s'\n", dp->d_name, s);
1523                         continue;
1524                 }
1525
1526                 /*
1527                  * We should now have old an old rotated logfile, so
1528                  * add it to the 'list'.
1529                  */
1530                 if ((oldlogs[logcnt].t = timegm(&tm)) == -1)
1531                         err(1, "Could not convert time string to time value");
1532                 if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL)
1533                         err(1, "strdup()");
1534                 logcnt++;
1535
1536                 /*
1537                  * It is very unlikely we ever run out of space in the
1538                  * logfile array from the default size, but lets
1539                  * handle it anyway...
1540                  */
1541                 if (logcnt >= max_logcnt) {
1542                         max_logcnt *= 4;
1543                         /* Detect integer overflow */
1544                         if (max_logcnt < logcnt)
1545                                 errx(1, "Too many old logfiles found");
1546                         oldlogs = realloc(oldlogs,
1547                             max_logcnt * sizeof(struct oldlog_entry));
1548                         if (oldlogs == NULL)
1549                                 err(1, "realloc()");
1550                 }
1551         }
1552
1553         /* Second, if needed we delete oldest archived logfiles */
1554         if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) {
1555                 oldlogs = realloc(oldlogs, logcnt *
1556                     sizeof(struct oldlog_entry));
1557                 if (oldlogs == NULL)
1558                         err(1, "realloc()");
1559
1560                 /*
1561                  * We now sort the logs in the order of newest to
1562                  * oldest.  That way we can simply skip over the
1563                  * number of records we want to keep.
1564                  */
1565                 qsort(oldlogs, logcnt, sizeof(struct oldlog_entry),
1566                     oldlog_entry_compare);
1567                 for (i = ent->numlogs - 1; i < logcnt; i++) {
1568                         if (noaction)
1569                                 printf("\trm -f %s/%s\n", dir,
1570                                     oldlogs[i].fname);
1571                         else if (unlinkat(dirfd, oldlogs[i].fname, 0) != 0) {
1572                                 snprintf(errbuf, sizeof(errbuf),
1573                                     "Could not delete old logfile '%s'",
1574                                     oldlogs[i].fname);
1575                                 perror(errbuf);
1576                         }
1577                 }
1578         } else if (verbose > 1)
1579                 printf("No old logs to delete for logfile %s\n", ent->log);
1580
1581         /* Third, cleanup */
1582         closedir(dirp);
1583         for (i = 0; i < logcnt; i++) {
1584                 assert(oldlogs[i].fname != NULL);
1585                 free(oldlogs[i].fname);
1586         }
1587         free(oldlogs);
1588         free(logfname);
1589         free(dir);
1590 }
1591
1592 /*
1593  * Only add to the queue if the file hasn't already been added. This is
1594  * done to prevent circular include loops.
1595  */
1596 static void
1597 add_to_queue(const char *fname, struct ilist *inclist)
1598 {
1599         struct include_entry *inc;
1600
1601         STAILQ_FOREACH(inc, inclist, inc_nextp) {
1602                 if (strcmp(fname, inc->file) == 0) {
1603                         warnx("duplicate include detected: %s", fname);
1604                         return;
1605                 }
1606         }
1607
1608         inc = malloc(sizeof(struct include_entry));
1609         if (inc == NULL)
1610                 err(1, "malloc of inc");
1611         inc->file = strdup(fname);
1612
1613         if (verbose > 2)
1614                 printf("\t+ Adding %s to the processing queue.\n", fname);
1615
1616         STAILQ_INSERT_TAIL(inclist, inc, inc_nextp);
1617 }
1618
1619 /*
1620  * Search for logfile and return its compression suffix (if supported)
1621  * The suffix detection is first-match in the order of compress_types
1622  *
1623  * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE)
1624  * a zero-length string is returned
1625  */
1626 static const char *
1627 get_logfile_suffix(const char *logfile)
1628 {
1629         struct stat st;
1630         char zfile[MAXPATHLEN];
1631
1632         for (int c = 0; c < COMPRESS_TYPES; c++) {
1633                 strlcpy(zfile, logfile, MAXPATHLEN);
1634                 strlcat(zfile, compress_type[c].suffix, MAXPATHLEN);
1635                 if (lstat(zfile, &st) == 0)
1636                         return (compress_type[c].suffix);
1637         }
1638         return (NULL);
1639 }
1640
1641 static fk_entry
1642 do_rotate(const struct conf_entry *ent)
1643 {
1644         char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1645         char file1[MAXPATHLEN], file2[MAXPATHLEN];
1646         char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1647         const char *logfile_suffix;
1648         char datetimestr[30];
1649         int flags, numlogs_c;
1650         fk_entry free_or_keep;
1651         struct sigwork_entry *swork;
1652         struct stat st;
1653         struct tm tm;
1654         time_t now;
1655
1656         flags = ent->flags;
1657         free_or_keep = FREE_ENT;
1658
1659         if (archtodir) {
1660                 char *p;
1661
1662                 /* build complete name of archive directory into dirpart */
1663                 if (*archdirname == '/') {      /* absolute */
1664                         strlcpy(dirpart, archdirname, sizeof(dirpart));
1665                 } else {        /* relative */
1666                         /* get directory part of logfile */
1667                         strlcpy(dirpart, ent->log, sizeof(dirpart));
1668                         if ((p = strrchr(dirpart, '/')) == NULL)
1669                                 dirpart[0] = '\0';
1670                         else
1671                                 *(p + 1) = '\0';
1672                         strlcat(dirpart, archdirname, sizeof(dirpart));
1673                 }
1674
1675                 /* check if archive directory exists, if not, create it */
1676                 if (lstat(dirpart, &st))
1677                         createdir(ent, dirpart);
1678
1679                 /* get filename part of logfile */
1680                 if ((p = strrchr(ent->log, '/')) == NULL)
1681                         strlcpy(namepart, ent->log, sizeof(namepart));
1682                 else
1683                         strlcpy(namepart, p + 1, sizeof(namepart));
1684
1685                 /* name of oldest log */
1686                 snprintf(file1, sizeof(file1), "%s/%s.%d", dirpart,
1687                     namepart, ent->numlogs);
1688         } else {
1689                 /*
1690                  * Tell delete_oldest_timelog() we are not using an
1691                  * archive dir.
1692                  */
1693                 dirpart[0] = '\0';
1694
1695                 /* name of oldest log */
1696                 snprintf(file1, sizeof(file1), "%s.%d", ent->log,
1697                     ent->numlogs);
1698         }
1699
1700         /* Delete old logs */
1701         if (timefnamefmt != NULL)
1702                 delete_oldest_timelog(ent, dirpart);
1703         else {
1704                 /* name of oldest log */
1705                 for (int c = 0; c < COMPRESS_TYPES; c++) {
1706                         snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1707                             compress_type[c].suffix);
1708                         if (noaction)
1709                                 printf("\trm -f %s\n", zfile1);
1710                         else
1711                                 unlink(zfile1);
1712                 }
1713         }
1714
1715         if (timefnamefmt != NULL) {
1716                 /* If time functions fails we can't really do any sensible */
1717                 if (time(&now) == (time_t)-1 ||
1718                     localtime_r(&now, &tm) == NULL)
1719                         bzero(&tm, sizeof(tm));
1720
1721                 strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm);
1722                 if (archtodir) {
1723                         snprintf(file1, sizeof(file1), "%s/%s.%s",
1724                             dirpart, namepart, datetimestr);
1725                 } else {
1726                         snprintf(file1, sizeof(file1), "%s.%s",
1727                             ent->log, datetimestr);
1728                 }
1729
1730                 /* Don't run the code to move down logs */
1731                 numlogs_c = 0;
1732         } else
1733                 numlogs_c = ent->numlogs;               /* copy for countdown */
1734
1735         /* Move down log files */
1736         while (numlogs_c--) {
1737
1738                 strlcpy(file2, file1, sizeof(file2));
1739
1740                 if (archtodir)
1741                         snprintf(file1, sizeof(file1), "%s/%s.%d",
1742                             dirpart, namepart, numlogs_c);
1743                 else
1744                         snprintf(file1, sizeof(file1), "%s.%d",
1745                             ent->log, numlogs_c);
1746
1747                 logfile_suffix = get_logfile_suffix(file1);
1748                 if (logfile_suffix == NULL)
1749                         continue;
1750                 strlcpy(zfile1, file1, MAXPATHLEN);
1751                 strlcpy(zfile2, file2, MAXPATHLEN);
1752                 strlcat(zfile1, logfile_suffix, MAXPATHLEN);
1753                 strlcat(zfile2, logfile_suffix, MAXPATHLEN);
1754
1755                 if (noaction)
1756                         printf("\tmv %s %s\n", zfile1, zfile2);
1757                 else {
1758                         /* XXX - Ought to be checking for failure! */
1759                         rename(zfile1, zfile2);
1760                 }
1761                 change_attrs(zfile2, ent);
1762         }
1763
1764         if (ent->numlogs > 0) {
1765                 if (noaction) {
1766                         /*
1767                          * Note that savelog() may succeed with using link()
1768                          * for the archtodir case, but there is no good way
1769                          * of knowing if it will when doing "noaction", so
1770                          * here we claim that it will have to do a copy...
1771                          */
1772                         if (archtodir)
1773                                 printf("\tcp %s %s\n", ent->log, file1);
1774                         else
1775                                 printf("\tln %s %s\n", ent->log, file1);
1776                 } else {
1777                         if (!(flags & CE_BINARY)) {
1778                                 /* Report the trimming to the old log */
1779                                 log_trim(ent->log, ent);
1780                         }
1781                         savelog(ent->log, file1);
1782                 }
1783                 change_attrs(file1, ent);
1784         }
1785
1786         /* Create the new log file and move it into place */
1787         if (noaction)
1788                 printf("Start new log...\n");
1789         createlog(ent);
1790
1791         /*
1792          * Save all signalling and file-compression to be done after log
1793          * files from all entries have been rotated.  This way any one
1794          * process will not be sent the same signal multiple times when
1795          * multiple log files had to be rotated.
1796          */
1797         swork = NULL;
1798         if (ent->pid_file != NULL)
1799                 swork = save_sigwork(ent);
1800         if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) {
1801                 /*
1802                  * The zipwork_entry will include a pointer to this
1803                  * conf_entry, so the conf_entry should not be freed.
1804                  */
1805                 free_or_keep = KEEP_ENT;
1806                 save_zipwork(ent, swork, ent->fsize, file1);
1807         }
1808
1809         return (free_or_keep);
1810 }
1811
1812 static void
1813 do_sigwork(struct sigwork_entry *swork)
1814 {
1815         struct sigwork_entry *nextsig;
1816         int kres, secs;
1817
1818         if (!(swork->sw_pidok) || swork->sw_pid == 0)
1819                 return;                 /* no work to do... */
1820
1821         /*
1822          * If nosignal (-s) was specified, then do not signal any process.
1823          * Note that a nosignal request triggers a warning message if the
1824          * rotated logfile needs to be compressed, *unless* -R was also
1825          * specified.  We assume that an `-sR' request came from a process
1826          * which writes to the logfile, and as such, we assume that process
1827          * has already made sure the logfile is not presently in use.  This
1828          * just sets swork->sw_pidok to a special value, and do_zipwork
1829          * will print any necessary warning(s).
1830          */
1831         if (nosignal) {
1832                 if (!rotatereq)
1833                         swork->sw_pidok = -1;
1834                 return;
1835         }
1836
1837         /*
1838          * Compute the pause between consecutive signals.  Use a longer
1839          * sleep time if we will be sending two signals to the same
1840          * deamon or process-group.
1841          */
1842         secs = 0;
1843         nextsig = SLIST_NEXT(swork, sw_nextp);
1844         if (nextsig != NULL) {
1845                 if (swork->sw_pid == nextsig->sw_pid)
1846                         secs = 10;
1847                 else
1848                         secs = 1;
1849         }
1850
1851         if (noaction) {
1852                 printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1853                     (int)swork->sw_pid, swork->sw_fname);
1854                 if (secs > 0)
1855                         printf("\tsleep %d\n", secs);
1856                 return;
1857         }
1858
1859         kres = kill(swork->sw_pid, swork->sw_signum);
1860         if (kres != 0) {
1861                 /*
1862                  * Assume that "no such process" (ESRCH) is something
1863                  * to warn about, but is not an error.  Presumably the
1864                  * process which writes to the rotated log file(s) is
1865                  * gone, in which case we should have no problem with
1866                  * compressing the rotated log file(s).
1867                  */
1868                 if (errno != ESRCH)
1869                         swork->sw_pidok = 0;
1870                 warn("can't notify %s, pid %d", swork->sw_pidtype,
1871                     (int)swork->sw_pid);
1872         } else {
1873                 if (verbose)
1874                         printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
1875                             (int)swork->sw_pid, swork->sw_fname);
1876                 if (secs > 0) {
1877                         if (verbose)
1878                                 printf("Pause %d second(s) between signals\n",
1879                                     secs);
1880                         sleep(secs);
1881                 }
1882         }
1883 }
1884
1885 static void
1886 do_zipwork(struct zipwork_entry *zwork)
1887 {
1888         const char *pgm_name, *pgm_path;
1889         int errsav, fcount, zstatus;
1890         pid_t pidzip, wpid;
1891         char zresult[MAXPATHLEN];
1892
1893         pgm_path = NULL;
1894         strlcpy(zresult, zwork->zw_fname, sizeof(zresult));
1895         if (zwork != NULL && zwork->zw_conf != NULL &&
1896             zwork->zw_conf->compress > COMPRESS_NONE)
1897                 for (int c = 1; c < COMPRESS_TYPES; c++) {
1898                         if (zwork->zw_conf->compress == c) {
1899                                 pgm_path = compress_type[c].path;
1900                                 strlcat(zresult,
1901                                     compress_type[c].suffix, sizeof(zresult));
1902                                 break;
1903                         }
1904                 }
1905         if (pgm_path == NULL) {
1906                 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname);
1907                 return;
1908         }
1909         pgm_name = strrchr(pgm_path, '/');
1910         if (pgm_name == NULL)
1911                 pgm_name = pgm_path;
1912         else
1913                 pgm_name++;
1914
1915         if (zwork->zw_swork != NULL && zwork->zw_swork->sw_pidok <= 0) {
1916                 warnx(
1917                     "log %s not compressed because daemon(s) not notified",
1918                     zwork->zw_fname);
1919                 change_attrs(zwork->zw_fname, zwork->zw_conf);
1920                 return;
1921         }
1922
1923         if (noaction) {
1924                 printf("\t%s %s\n", pgm_name, zwork->zw_fname);
1925                 change_attrs(zresult, zwork->zw_conf);
1926                 return;
1927         }
1928
1929         fcount = 1;
1930         pidzip = fork();
1931         while (pidzip < 0) {
1932                 /*
1933                  * The fork failed.  If the failure was due to a temporary
1934                  * problem, then wait a short time and try it again.
1935                  */
1936                 errsav = errno;
1937                 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname);
1938                 if (errsav != EAGAIN || fcount > 5)
1939                         errx(1, "Exiting...");
1940                 sleep(fcount * 12);
1941                 fcount++;
1942                 pidzip = fork();
1943         }
1944         if (!pidzip) {
1945                 /* The child process executes the compression command */
1946                 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, NULL);
1947                 err(1, "execl(`%s -f %s')", pgm_path, zwork->zw_fname);
1948         }
1949
1950         wpid = waitpid(pidzip, &zstatus, 0);
1951         if (wpid == -1) {
1952                 /* XXX - should this be a fatal error? */
1953                 warn("%s: waitpid(%d)", pgm_path, pidzip);
1954                 return;
1955         }
1956         if (!WIFEXITED(zstatus)) {
1957                 warnx("`%s -f %s' did not terminate normally", pgm_name,
1958                     zwork->zw_fname);
1959                 return;
1960         }
1961         if (WEXITSTATUS(zstatus)) {
1962                 warnx("`%s -f %s' terminated with a non-zero status (%d)",
1963                     pgm_name, zwork->zw_fname, WEXITSTATUS(zstatus));
1964                 return;
1965         }
1966
1967         /* Compression was successful, set file attributes on the result. */
1968         change_attrs(zresult, zwork->zw_conf);
1969 }
1970
1971 /*
1972  * Save information on any process we need to signal.  Any single
1973  * process may need to be sent different signal-values for different
1974  * log files, but usually a single signal-value will cause the process
1975  * to close and re-open all of it's log files.
1976  */
1977 static struct sigwork_entry *
1978 save_sigwork(const struct conf_entry *ent)
1979 {
1980         struct sigwork_entry *sprev, *stmp;
1981         int ndiff;
1982         size_t tmpsiz;
1983
1984         sprev = NULL;
1985         ndiff = 1;
1986         SLIST_FOREACH(stmp, &swhead, sw_nextp) {
1987                 ndiff = strcmp(ent->pid_file, stmp->sw_fname);
1988                 if (ndiff > 0)
1989                         break;
1990                 if (ndiff == 0) {
1991                         if (ent->sig == stmp->sw_signum)
1992                                 break;
1993                         if (ent->sig > stmp->sw_signum) {
1994                                 ndiff = 1;
1995                                 break;
1996                         }
1997                 }
1998                 sprev = stmp;
1999         }
2000         if (stmp != NULL && ndiff == 0)
2001                 return (stmp);
2002
2003         tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_file) + 1;
2004         stmp = malloc(tmpsiz);
2005         set_swpid(stmp, ent);
2006         stmp->sw_signum = ent->sig;
2007         strcpy(stmp->sw_fname, ent->pid_file);
2008         if (sprev == NULL)
2009                 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
2010         else
2011                 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
2012         return (stmp);
2013 }
2014
2015 /*
2016  * Save information on any file we need to compress.  We may see the same
2017  * file multiple times, so check the full list to avoid duplicates.  The
2018  * list itself is sorted smallest-to-largest, because that's the order we
2019  * want to compress the files.  If the partition is very low on disk space,
2020  * then the smallest files are the most likely to compress, and compressing
2021  * them first will free up more space for the larger files.
2022  */
2023 static struct zipwork_entry *
2024 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
2025     int zsize, const char *zipfname)
2026 {
2027         struct zipwork_entry *zprev, *ztmp;
2028         int ndiff;
2029         size_t tmpsiz;
2030
2031         /* Compute the size if the caller did not know it. */
2032         if (zsize < 0)
2033                 zsize = sizefile(zipfname);
2034
2035         zprev = NULL;
2036         ndiff = 1;
2037         SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
2038                 ndiff = strcmp(zipfname, ztmp->zw_fname);
2039                 if (ndiff == 0)
2040                         break;
2041                 if (zsize > ztmp->zw_fsize)
2042                         zprev = ztmp;
2043         }
2044         if (ztmp != NULL && ndiff == 0)
2045                 return (ztmp);
2046
2047         tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
2048         ztmp = malloc(tmpsiz);
2049         ztmp->zw_conf = ent;
2050         ztmp->zw_swork = swork;
2051         ztmp->zw_fsize = zsize;
2052         strcpy(ztmp->zw_fname, zipfname);
2053         if (zprev == NULL)
2054                 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
2055         else
2056                 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
2057         return (ztmp);
2058 }
2059
2060 /* Send a signal to the pid specified by pidfile */
2061 static void
2062 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
2063 {
2064         FILE *f;
2065         long minok, maxok, rval;
2066         char *endp, *linep, line[BUFSIZ];
2067
2068         minok = MIN_PID;
2069         maxok = MAX_PID;
2070         swork->sw_pidok = 0;
2071         swork->sw_pid = 0;
2072         swork->sw_pidtype = "daemon";
2073         if (ent->flags & CE_SIGNALGROUP) {
2074                 /*
2075                  * If we are expected to signal a process-group when
2076                  * rotating this logfile, then the value read in should
2077                  * be the negative of a valid process ID.
2078                  */
2079                 minok = -MAX_PID;
2080                 maxok = -MIN_PID;
2081                 swork->sw_pidtype = "process-group";
2082         }
2083
2084         f = fopen(ent->pid_file, "r");
2085         if (f == NULL) {
2086                 if (errno == ENOENT && enforcepid == 0) {
2087                         /*
2088                          * Warn if the PID file doesn't exist, but do
2089                          * not consider it an error.  Most likely it
2090                          * means the process has been terminated,
2091                          * so it should be safe to rotate any log
2092                          * files that the process would have been using.
2093                          */
2094                         swork->sw_pidok = 1;
2095                         warnx("pid file doesn't exist: %s", ent->pid_file);
2096                 } else
2097                         warn("can't open pid file: %s", ent->pid_file);
2098                 return;
2099         }
2100
2101         if (fgets(line, BUFSIZ, f) == NULL) {
2102                 /*
2103                  * Warn if the PID file is empty, but do not consider
2104                  * it an error.  Most likely it means the process has
2105                  * has terminated, so it should be safe to rotate any
2106                  * log files that the process would have been using.
2107                  */
2108                 if (feof(f) && enforcepid == 0) {
2109                         swork->sw_pidok = 1;
2110                         warnx("pid file is empty: %s", ent->pid_file);
2111                 } else
2112                         warn("can't read from pid file: %s", ent->pid_file);
2113                 fclose(f);
2114                 return;
2115         }
2116         fclose(f);
2117
2118         errno = 0;
2119         linep = line;
2120         while (*linep == ' ')
2121                 linep++;
2122         rval = strtol(linep, &endp, 10);
2123         if (*endp != '\0' && !isspacech(*endp)) {
2124                 warnx("pid file does not start with a valid number: %s",
2125                     ent->pid_file);
2126         } else if (rval < minok || rval > maxok) {
2127                 warnx("bad value '%ld' for process number in %s",
2128                     rval, ent->pid_file);
2129                 if (verbose)
2130                         warnx("\t(expecting value between %ld and %ld)",
2131                             minok, maxok);
2132         } else {
2133                 swork->sw_pidok = 1;
2134                 swork->sw_pid = rval;
2135         }
2136
2137         return;
2138 }
2139
2140 /* Log the fact that the logs were turned over */
2141 static int
2142 log_trim(const char *logname, const struct conf_entry *log_ent)
2143 {
2144         FILE *f;
2145         const char *xtra;
2146
2147         if ((f = fopen(logname, "a")) == NULL)
2148                 return (-1);
2149         xtra = "";
2150         if (log_ent->def_cfg)
2151                 xtra = " using <default> rule";
2152         if (log_ent->firstcreate)
2153                 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n",
2154                     daytime, hostname, (int) getpid(), xtra);
2155         else if (log_ent->r_reason != NULL)
2156                 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n",
2157                     daytime, hostname, (int) getpid(), log_ent->r_reason, xtra);
2158         else
2159                 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n",
2160                     daytime, hostname, (int) getpid(), xtra);
2161         if (fclose(f) == EOF)
2162                 err(1, "log_trim: fclose");
2163         return (0);
2164 }
2165
2166 /* Return size in kilobytes of a file */
2167 static int
2168 sizefile(const char *file)
2169 {
2170         struct stat sb;
2171
2172         if (stat(file, &sb) < 0)
2173                 return (-1);
2174         return (kbytes(dbtob(sb.st_blocks)));
2175 }
2176
2177 /* Return the age of old log file (file.0) */
2178 static int
2179 age_old_log(char *file)
2180 {
2181         struct stat sb;
2182         const char *logfile_suffix;
2183         char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1];
2184
2185         if (archtodir) {
2186                 char *p;
2187
2188                 /* build name of archive directory into tmp */
2189                 if (*archdirname == '/') {      /* absolute */
2190                         strlcpy(tmp, archdirname, sizeof(tmp));
2191                 } else {        /* relative */
2192                         /* get directory part of logfile */
2193                         strlcpy(tmp, file, sizeof(tmp));
2194                         if ((p = strrchr(tmp, '/')) == NULL)
2195                                 tmp[0] = '\0';
2196                         else
2197                                 *(p + 1) = '\0';
2198                         strlcat(tmp, archdirname, sizeof(tmp));
2199                 }
2200
2201                 strlcat(tmp, "/", sizeof(tmp));
2202
2203                 /* get filename part of logfile */
2204                 if ((p = strrchr(file, '/')) == NULL)
2205                         strlcat(tmp, file, sizeof(tmp));
2206                 else
2207                         strlcat(tmp, p + 1, sizeof(tmp));
2208         } else {
2209                 strlcpy(tmp, file, sizeof(tmp));
2210         }
2211
2212         strlcat(tmp, ".0", sizeof(tmp));
2213         logfile_suffix = get_logfile_suffix(tmp);
2214         if (logfile_suffix == NULL)
2215                 return (-1);
2216         strlcat(tmp, logfile_suffix, sizeof(tmp));
2217         if (stat(tmp, &sb) < 0)
2218                 return (-1);
2219         return ((int)(ptimeget_secs(timenow) - sb.st_mtime + 1800) / 3600);
2220 }
2221
2222 /* Skip Over Blanks */
2223 static char *
2224 sob(char *p)
2225 {
2226         while (p && *p && isspace(*p))
2227                 p++;
2228         return (p);
2229 }
2230
2231 /* Skip Over Non-Blanks */
2232 static char *
2233 son(char *p)
2234 {
2235         while (p && *p && !isspace(*p))
2236                 p++;
2237         return (p);
2238 }
2239
2240 /* Check if string is actually a number */
2241 static int
2242 isnumberstr(const char *string)
2243 {
2244         while (*string) {
2245                 if (!isdigitch(*string++))
2246                         return (0);
2247         }
2248         return (1);
2249 }
2250
2251 /* Check if string contains a glob */
2252 static int
2253 isglobstr(const char *string)
2254 {
2255         char chr;
2256
2257         while ((chr = *string++)) {
2258                 if (chr == '*' || chr == '?' || chr == '[')
2259                         return (1);
2260         }
2261         return (0);
2262 }
2263
2264 /*
2265  * Save the active log file under a new name.  A link to the new name
2266  * is the quick-and-easy way to do this.  If that fails (which it will
2267  * if the destination is on another partition), then make a copy of
2268  * the file to the new location.
2269  */
2270 static void
2271 savelog(char *from, char *to)
2272 {
2273         FILE *src, *dst;
2274         int c, res;
2275
2276         res = link(from, to);
2277         if (res == 0)
2278                 return;
2279
2280         if ((src = fopen(from, "r")) == NULL)
2281                 err(1, "can't fopen %s for reading", from);
2282         if ((dst = fopen(to, "w")) == NULL)
2283                 err(1, "can't fopen %s for writing", to);
2284
2285         while ((c = getc(src)) != EOF) {
2286                 if ((putc(c, dst)) == EOF)
2287                         err(1, "error writing to %s", to);
2288         }
2289
2290         if (ferror(src))
2291                 err(1, "error reading from %s", from);
2292         if ((fclose(src)) != 0)
2293                 err(1, "can't fclose %s", to);
2294         if ((fclose(dst)) != 0)
2295                 err(1, "can't fclose %s", from);
2296 }
2297
2298 /* create one or more directory components of a path */
2299 static void
2300 createdir(const struct conf_entry *ent, char *dirpart)
2301 {
2302         int res;
2303         char *s, *d;
2304         char mkdirpath[MAXPATHLEN];
2305         struct stat st;
2306
2307         s = dirpart;
2308         d = mkdirpath;
2309
2310         for (;;) {
2311                 *d++ = *s++;
2312                 if (*s != '/' && *s != '\0')
2313                         continue;
2314                 *d = '\0';
2315                 res = lstat(mkdirpath, &st);
2316                 if (res != 0) {
2317                         if (noaction) {
2318                                 printf("\tmkdir %s\n", mkdirpath);
2319                         } else {
2320                                 res = mkdir(mkdirpath, 0755);
2321                                 if (res != 0)
2322                                         err(1, "Error on mkdir(\"%s\") for -a",
2323                                             mkdirpath);
2324                         }
2325                 }
2326                 if (*s == '\0')
2327                         break;
2328         }
2329         if (verbose) {
2330                 if (ent->firstcreate)
2331                         printf("Created directory '%s' for new %s\n",
2332                             dirpart, ent->log);
2333                 else
2334                         printf("Created directory '%s' for -a\n", dirpart);
2335         }
2336 }
2337
2338 /*
2339  * Create a new log file, destroying any currently-existing version
2340  * of the log file in the process.  If the caller wants a backup copy
2341  * of the file to exist, they should call 'link(logfile,logbackup)'
2342  * before calling this routine.
2343  */
2344 void
2345 createlog(const struct conf_entry *ent)
2346 {
2347         int fd, failed;
2348         struct stat st;
2349         char *realfile, *slash, tempfile[MAXPATHLEN];
2350
2351         fd = -1;
2352         realfile = ent->log;
2353
2354         /*
2355          * If this log file is being created for the first time (-C option),
2356          * then it may also be true that the parent directory does not exist
2357          * yet.  Check, and create that directory if it is missing.
2358          */
2359         if (ent->firstcreate) {
2360                 strlcpy(tempfile, realfile, sizeof(tempfile));
2361                 slash = strrchr(tempfile, '/');
2362                 if (slash != NULL) {
2363                         *slash = '\0';
2364                         failed = stat(tempfile, &st);
2365                         if (failed && errno != ENOENT)
2366                                 err(1, "Error on stat(%s)", tempfile);
2367                         if (failed)
2368                                 createdir(ent, tempfile);
2369                         else if (!S_ISDIR(st.st_mode))
2370                                 errx(1, "%s exists but is not a directory",
2371                                     tempfile);
2372                 }
2373         }
2374
2375         /*
2376          * First create an unused filename, so it can be chown'ed and
2377          * chmod'ed before it is moved into the real location.  mkstemp
2378          * will create the file mode=600 & owned by us.  Note that all
2379          * temp files will have a suffix of '.z<something>'.
2380          */
2381         strlcpy(tempfile, realfile, sizeof(tempfile));
2382         strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2383         if (noaction)
2384                 printf("\tmktemp %s\n", tempfile);
2385         else {
2386                 fd = mkstemp(tempfile);
2387                 if (fd < 0)
2388                         err(1, "can't mkstemp logfile %s", tempfile);
2389
2390                 /*
2391                  * Add status message to what will become the new log file.
2392                  */
2393                 if (!(ent->flags & CE_BINARY)) {
2394                         if (log_trim(tempfile, ent))
2395                                 err(1, "can't add status message to log");
2396                 }
2397         }
2398
2399         /* Change the owner/group, if we are supposed to */
2400         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2401                 if (noaction)
2402                         printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2403                             tempfile);
2404                 else {
2405                         failed = fchown(fd, ent->uid, ent->gid);
2406                         if (failed)
2407                                 err(1, "can't fchown temp file %s", tempfile);
2408                 }
2409         }
2410
2411         /* Turn on NODUMP if it was requested in the config-file. */
2412         if (ent->flags & CE_NODUMP) {
2413                 if (noaction)
2414                         printf("\tchflags nodump %s\n", tempfile);
2415                 else {
2416                         failed = fchflags(fd, UF_NODUMP);
2417                         if (failed) {
2418                                 warn("log_trim: fchflags(NODUMP)");
2419                         }
2420                 }
2421         }
2422
2423         /*
2424          * Note that if the real logfile still exists, and if the call
2425          * to rename() fails, then "neither the old file nor the new
2426          * file shall be changed or created" (to quote the standard).
2427          * If the call succeeds, then the file will be replaced without
2428          * any window where some other process might find that the file
2429          * did not exist.
2430          * XXX - ? It may be that for some error conditions, we could
2431          *      retry by first removing the realfile and then renaming.
2432          */
2433         if (noaction) {
2434                 printf("\tchmod %o %s\n", ent->permissions, tempfile);
2435                 printf("\tmv %s %s\n", tempfile, realfile);
2436         } else {
2437                 failed = fchmod(fd, ent->permissions);
2438                 if (failed)
2439                         err(1, "can't fchmod temp file '%s'", tempfile);
2440                 failed = rename(tempfile, realfile);
2441                 if (failed)
2442                         err(1, "can't mv %s to %s", tempfile, realfile);
2443         }
2444
2445         if (fd >= 0)
2446                 close(fd);
2447 }
2448
2449 /*
2450  * Change the attributes of a given filename to what was specified in
2451  * the newsyslog.conf entry.  This routine is only called for files
2452  * that newsyslog expects that it has created, and thus it is a fatal
2453  * error if this routine finds that the file does not exist.
2454  */
2455 static void
2456 change_attrs(const char *fname, const struct conf_entry *ent)
2457 {
2458         int failed;
2459
2460         if (noaction) {
2461                 printf("\tchmod %o %s\n", ent->permissions, fname);
2462
2463                 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2464                         printf("\tchown %u:%u %s\n",
2465                             ent->uid, ent->gid, fname);
2466
2467                 if (ent->flags & CE_NODUMP)
2468                         printf("\tchflags nodump %s\n", fname);
2469                 return;
2470         }
2471
2472         failed = chmod(fname, ent->permissions);
2473         if (failed) {
2474                 if (errno != EPERM)
2475                         err(1, "chmod(%s) in change_attrs", fname);
2476                 warn("change_attrs couldn't chmod(%s)", fname);
2477         }
2478
2479         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2480                 failed = chown(fname, ent->uid, ent->gid);
2481                 if (failed)
2482                         warn("can't chown %s", fname);
2483         }
2484
2485         if (ent->flags & CE_NODUMP) {
2486                 failed = chflags(fname, UF_NODUMP);
2487                 if (failed)
2488                         warn("can't chflags %s NODUMP", fname);
2489         }
2490 }