usr.sbin/newsyslog/newsyslog.c

   1 /*-
   2  * ------+---------+---------+-------- + --------+---------+---------+---------*
   3  * This file includes significant modifications done by:
   4  * Copyright (c) 2003, 2004  - Garance Alistair Drosehn <gad@FreeBSD.org>.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *   1. Redistributions of source code must retain the above copyright
  11  *      notice, this list of conditions and the following disclaimer.
  12  *   2. Redistributions in binary form must reproduce the above copyright
  13  *      notice, this list of conditions and the following disclaimer in the
  14  *      documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * ------+---------+---------+-------- + --------+---------+---------+---------*
  29  */
  30
  31 /*
  32  * This file contains changes from the Open Software Foundation.
  33  */
  34
  35 /*
  36  * Copyright 1988, 1989 by the Massachusetts Institute of Technology
  37  *
  38  * Permission to use, copy, modify, and distribute this software and its
  39  * documentation for any purpose and without fee is hereby granted, provided
  40  * that the above copyright notice appear in all copies and that both that
  41  * copyright notice and this permission notice appear in supporting
  42  * documentation, and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
  43  * used in advertising or publicity pertaining to distribution of the
  44  * software without specific, written prior permission. M.I.T. and the M.I.T.
  45  * S.I.P.B. make no representations about the suitability of this software
  46  * for any purpose.  It is provided "as is" without express or implied
  47  * warranty.
  48  *
  49  */
  50
  51 /*
  52  * newsyslog - roll over selected logs at the appropriate time, keeping the a
  53  * specified number of backup files around.
  54  */
  55
  56 #include <sys/cdefs.h>
  57 __FBSDID("$FreeBSD$");
  58
  59 #define OSF
  60
  61 #include <sys/param.h>
  62 #include <sys/queue.h>
  63 #include <sys/stat.h>
  64 #include <sys/wait.h>
  65
  66 #include <assert.h>
  67 #include <ctype.h>
  68 #include <err.h>
  69 #include <errno.h>
  70 #include <dirent.h>
  71 #include <fcntl.h>
  72 #include <fnmatch.h>
  73 #include <glob.h>
  74 #include <grp.h>
  75 #include <paths.h>
  76 #include <pwd.h>
  77 #include <signal.h>
  78 #include <stdio.h>
  79 #include <libgen.h>
  80 #include <stdlib.h>
  81 #include <string.h>
  82 #include <time.h>
  83 #include <unistd.h>
  84
  85 #include "pathnames.h"
  86 #include "extern.h"
  87
  88 /*
  89  * Compression suffixes
  90  */
  91 #ifndef COMPRESS_SUFFIX_GZ
  92 #define COMPRESS_SUFFIX_GZ      ".gz"
  93 #endif
  94
  95 #ifndef COMPRESS_SUFFIX_BZ2
  96 #define COMPRESS_SUFFIX_BZ2     ".bz2"
  97 #endif
  98
  99 #ifndef COMPRESS_SUFFIX_XZ
 100 #define COMPRESS_SUFFIX_XZ      ".xz"
 101 #endif
 102
 103 #define COMPRESS_SUFFIX_MAXLEN  MAX(MAX(sizeof(COMPRESS_SUFFIX_GZ),sizeof(COMPRESS_SUFFIX_BZ2)),sizeof(COMPRESS_SUFFIX_XZ))
 104
 105 /*
 106  * Compression types
 107  */
 108 #define COMPRESS_TYPES  4       /* Number of supported compression types */
 109
 110 #define COMPRESS_NONE   0
 111 #define COMPRESS_GZIP   1
 112 #define COMPRESS_BZIP2  2
 113 #define COMPRESS_XZ     3
 114
 115 /*
 116  * Bit-values for the 'flags' parsed from a config-file entry.
 117  */
 118 #define CE_BINARY       0x0008  /* Logfile is in binary, do not add status */
 119                                 /*    messages to logfile(s) when rotating. */
 120 #define CE_NOSIGNAL     0x0010  /* There is no process to signal when */
 121                                 /*    trimming this file. */
 122 #define CE_TRIMAT       0x0020  /* trim file at a specific time. */
 123 #define CE_GLOB         0x0040  /* name of the log is file name pattern. */
 124 #define CE_SIGNALGROUP  0x0080  /* Signal a process-group instead of a single */
 125                                 /*    process when trimming this file. */
 126 #define CE_CREATE       0x0100  /* Create the log file if it does not exist. */
 127 #define CE_NODUMP       0x0200  /* Set 'nodump' on newly created log file. */
 128 #define CE_PID2CMD      0x0400  /* Replace PID file with a shell command.*/
 129
 130 #define MIN_PID         5       /* Don't touch pids lower than this */
 131 #define MAX_PID         99999   /* was lower, see /usr/include/sys/proc.h */
 132
 133 #define kbytes(size)  (((size) + 1023) >> 10)
 134
 135 #define DEFAULT_MARKER  "<default>"
 136 #define DEBUG_MARKER    "<debug>"
 137 #define INCLUDE_MARKER  "<include>"
 138 #define DEFAULT_TIMEFNAME_FMT   "%Y%m%dT%H%M%S"
 139
 140 #define MAX_OLDLOGS 65536       /* Default maximum number of old logfiles */
 141
 142 struct compress_types {
 143         const char *flag;       /* Flag in configuration file */
 144         const char *suffix;     /* Compression suffix */
 145         const char *path;       /* Path to compression program */
 146 };
 147
 148 static const struct compress_types compress_type[COMPRESS_TYPES] = {
 149         { "", "", "" },                                 /* no compression */
 150         { "Z", COMPRESS_SUFFIX_GZ, _PATH_GZIP },        /* gzip compression */
 151         { "J", COMPRESS_SUFFIX_BZ2, _PATH_BZIP2 },      /* bzip2 compression */
 152         { "X", COMPRESS_SUFFIX_XZ, _PATH_XZ }           /* xz compression */
 153 };
 154
 155 struct conf_entry {
 156         STAILQ_ENTRY(conf_entry) cf_nextp;
 157         char *log;              /* Name of the log */
 158         char *pid_cmd_file;             /* PID or command file */
 159         char *r_reason;         /* The reason this file is being rotated */
 160         int firstcreate;        /* Creating log for the first time (-C). */
 161         int rotate;             /* Non-zero if this file should be rotated */
 162         int fsize;              /* size found for the log file */
 163         uid_t uid;              /* Owner of log */
 164         gid_t gid;              /* Group of log */
 165         int numlogs;            /* Number of logs to keep */
 166         int trsize;             /* Size cutoff to trigger trimming the log */
 167         int hours;              /* Hours between log trimming */
 168         struct ptime_data *trim_at;     /* Specific time to do trimming */
 169         unsigned int permissions;       /* File permissions on the log */
 170         int flags;              /* CE_BINARY */
 171         int compress;           /* Compression */
 172         int sig;                /* Signal to send */
 173         int def_cfg;            /* Using the <default> rule for this file */
 174 };
 175
 176 struct sigwork_entry {
 177         SLIST_ENTRY(sigwork_entry) sw_nextp;
 178         int      sw_signum;             /* the signal to send */
 179         int      sw_pidok;              /* true if pid value is valid */
 180         pid_t    sw_pid;                /* the process id from the PID file */
 181         const char *sw_pidtype;         /* "daemon" or "process group" */
 182         int      sw_runcmd;             /* run command or send PID to signal */
 183         char     sw_fname[1];           /* file the PID was read from or shell cmd */
 184 };
 185
 186 struct zipwork_entry {
 187         SLIST_ENTRY(zipwork_entry) zw_nextp;
 188         const struct conf_entry *zw_conf;       /* for chown/perm/flag info */
 189         const struct sigwork_entry *zw_swork;   /* to know success of signal */
 190         int      zw_fsize;              /* size of the file to compress */
 191         char     zw_fname[1];           /* the file to compress */
 192 };
 193
 194 struct include_entry {
 195         STAILQ_ENTRY(include_entry) inc_nextp;
 196         const char *file;       /* Name of file to process */
 197 };
 198
 199 struct oldlog_entry {
 200         char *fname;            /* Filename of the log file */
 201         time_t t;               /* Parsed timestamp of the logfile */
 202 };
 203
 204 typedef enum {
 205         FREE_ENT, KEEP_ENT
 206 }       fk_entry;
 207
 208 STAILQ_HEAD(cflist, conf_entry);
 209 static SLIST_HEAD(swlisthead, sigwork_entry) swhead =
 210     SLIST_HEAD_INITIALIZER(swhead);
 211 static SLIST_HEAD(zwlisthead, zipwork_entry) zwhead =
 212     SLIST_HEAD_INITIALIZER(zwhead);
 213 STAILQ_HEAD(ilist, include_entry);
 214
 215 int dbg_at_times;               /* -D Show details of 'trim_at' code */
 216
 217 static int archtodir = 0;       /* Archive old logfiles to other directory */
 218 static int createlogs;          /* Create (non-GLOB) logfiles which do not */
 219                                 /*    already exist.  1=='for entries with */
 220                                 /*    C flag', 2=='for all entries'. */
 221 int verbose = 0;                /* Print out what's going on */
 222 static int needroot = 1;        /* Root privs are necessary */
 223 int noaction = 0;               /* Don't do anything, just show it */
 224 static int norotate = 0;        /* Don't rotate */
 225 static int nosignal;            /* Do not send any signals */
 226 static int enforcepid = 0;      /* If PID file does not exist or empty, do nothing */
 227 static int force = 0;           /* Force the trim no matter what */
 228 static int rotatereq = 0;       /* -R = Always rotate the file(s) as given */
 229                                 /*    on the command (this also requires   */
 230                                 /*    that a list of files *are* given on  */
 231                                 /*    the run command). */
 232 static char *requestor;         /* The name given on a -R request */
 233 static char *timefnamefmt = NULL;/* Use time based filenames instead of .0 */
 234 static char *archdirname;       /* Directory path to old logfiles archive */
 235 static char *destdir = NULL;    /* Directory to treat at root for logs */
 236 static const char *conf;        /* Configuration file to use */
 237
 238 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */
 239 static struct ptime_data *timenow; /* The time to use for checking at-fields */
 240
 241 #define DAYTIME_LEN     16
 242 static char daytime[DAYTIME_LEN];/* The current time in human readable form,
 243                                   * used for rotation-tracking messages. */
 244 static char hostname[MAXHOSTNAMELEN]; /* hostname */
 245
 246 static const char *path_syslogpid = _PATH_SYSLOGPID;
 247
 248 static struct cflist *get_worklist(char **files);
 249 static void parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
 250                     struct conf_entry *defconf_p, struct ilist *inclist);
 251 static void add_to_queue(const char *fname, struct ilist *inclist);
 252 static char *sob(char *p);
 253 static char *son(char *p);
 254 static int isnumberstr(const char *);
 255 static int isglobstr(const char *);
 256 static char *missing_field(char *p, char *errline);
 257 static void      change_attrs(const char *, const struct conf_entry *);
 258 static const char *get_logfile_suffix(const char *logfile);
 259 static fk_entry  do_entry(struct conf_entry *);
 260 static fk_entry  do_rotate(const struct conf_entry *);
 261 static void      do_sigwork(struct sigwork_entry *);
 262 static void      do_zipwork(struct zipwork_entry *);
 263 static struct sigwork_entry *
 264                  save_sigwork(const struct conf_entry *);
 265 static struct zipwork_entry *
 266                  save_zipwork(const struct conf_entry *, const struct
 267                     sigwork_entry *, int, const char *);
 268 static void      set_swpid(struct sigwork_entry *, const struct conf_entry *);
 269 static int       sizefile(const char *);
 270 static void expand_globs(struct cflist *work_p, struct cflist *glob_p);
 271 static void free_clist(struct cflist *list);
 272 static void free_entry(struct conf_entry *ent);
 273 static struct conf_entry *init_entry(const char *fname,
 274                 struct conf_entry *src_entry);
 275 static void parse_args(int argc, char **argv);
 276 static int parse_doption(const char *doption);
 277 static void usage(void);
 278 static int log_trim(const char *logname, const struct conf_entry *log_ent);
 279 static int age_old_log(char *file);
 280 static void savelog(char *from, char *to);
 281 static void createdir(const struct conf_entry *ent, char *dirpart);
 282 static void createlog(const struct conf_entry *ent);
 283
 284 /*
 285  * All the following take a parameter of 'int', but expect values in the
 286  * range of unsigned char.  Define wrappers which take values of type 'char',
 287  * whether signed or unsigned, and ensure they end up in the right range.
 288  */
 289 #define isdigitch(Anychar) isdigit((u_char)(Anychar))
 290 #define isprintch(Anychar) isprint((u_char)(Anychar))
 291 #define isspacech(Anychar) isspace((u_char)(Anychar))
 292 #define tolowerch(Anychar) tolower((u_char)(Anychar))
 293
 294 int
 295 main(int argc, char **argv)
 296 {
 297         struct cflist *worklist;
 298         struct conf_entry *p;
 299         struct sigwork_entry *stmp;
 300         struct zipwork_entry *ztmp;
 301
 302         SLIST_INIT(&swhead);
 303         SLIST_INIT(&zwhead);
 304
 305         parse_args(argc, argv);
 306         argc -= optind;
 307         argv += optind;
 308
 309         if (needroot && getuid() && geteuid())
 310                 errx(1, "must have root privs");
 311         worklist = get_worklist(argv);
 312
 313         /*
 314          * Rotate all the files which need to be rotated.  Note that
 315          * some users have *hundreds* of entries in newsyslog.conf!
 316          */
 317         while (!STAILQ_EMPTY(worklist)) {
 318                 p = STAILQ_FIRST(worklist);
 319                 STAILQ_REMOVE_HEAD(worklist, cf_nextp);
 320                 if (do_entry(p) == FREE_ENT)
 321                         free_entry(p);
 322         }
 323
 324         /*
 325          * Send signals to any processes which need a signal to tell
 326          * them to close and re-open the log file(s) we have rotated.
 327          * Note that zipwork_entries include pointers to these
 328          * sigwork_entry's, so we can not free the entries here.
 329          */
 330         if (!SLIST_EMPTY(&swhead)) {
 331                 if (noaction || verbose)
 332                         printf("Signal all daemon process(es)...\n");
 333                 SLIST_FOREACH(stmp, &swhead, sw_nextp)
 334                         do_sigwork(stmp);
 335                 if (noaction)
 336                         printf("\tsleep 10\n");
 337                 else {
 338                         if (verbose)
 339                                 printf("Pause 10 seconds to allow daemon(s)"
 340                                     " to close log file(s)\n");
 341                         sleep(10);
 342                 }
 343         }
 344         /*
 345          * Compress all files that we're expected to compress, now
 346          * that all processes should have closed the files which
 347          * have been rotated.
 348          */
 349         if (!SLIST_EMPTY(&zwhead)) {
 350                 if (noaction || verbose)
 351                         printf("Compress all rotated log file(s)...\n");
 352                 while (!SLIST_EMPTY(&zwhead)) {
 353                         ztmp = SLIST_FIRST(&zwhead);
 354                         do_zipwork(ztmp);
 355                         SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
 356                         free(ztmp);
 357                 }
 358         }
 359         /* Now free all the sigwork entries. */
 360         while (!SLIST_EMPTY(&swhead)) {
 361                 stmp = SLIST_FIRST(&swhead);
 362                 SLIST_REMOVE_HEAD(&swhead, sw_nextp);
 363                 free(stmp);
 364         }
 365
 366         while (wait(NULL) > 0 || errno == EINTR)
 367                 ;
 368         return (0);
 369 }
 370
 371 static struct conf_entry *
 372 init_entry(const char *fname, struct conf_entry *src_entry)
 373 {
 374         struct conf_entry *tempwork;
 375
 376         if (verbose > 4)
 377                 printf("\t--> [creating entry for %s]\n", fname);
 378
 379         tempwork = malloc(sizeof(struct conf_entry));
 380         if (tempwork == NULL)
 381                 err(1, "malloc of conf_entry for %s", fname);
 382
 383         if (destdir == NULL || fname[0] != '/')
 384                 tempwork->log = strdup(fname);
 385         else
 386                 asprintf(&tempwork->log, "%s%s", destdir, fname);
 387         if (tempwork->log == NULL)
 388                 err(1, "strdup for %s", fname);
 389
 390         if (src_entry != NULL) {
 391                 tempwork->pid_cmd_file = NULL;
 392                 if (src_entry->pid_cmd_file)
 393                         tempwork->pid_cmd_file = strdup(src_entry->pid_cmd_file);
 394                 tempwork->r_reason = NULL;
 395                 tempwork->firstcreate = 0;
 396                 tempwork->rotate = 0;
 397                 tempwork->fsize = -1;
 398                 tempwork->uid = src_entry->uid;
 399                 tempwork->gid = src_entry->gid;
 400                 tempwork->numlogs = src_entry->numlogs;
 401                 tempwork->trsize = src_entry->trsize;
 402                 tempwork->hours = src_entry->hours;
 403                 tempwork->trim_at = NULL;
 404                 if (src_entry->trim_at != NULL)
 405                         tempwork->trim_at = ptime_init(src_entry->trim_at);
 406                 tempwork->permissions = src_entry->permissions;
 407                 tempwork->flags = src_entry->flags;
 408                 tempwork->compress = src_entry->compress;
 409                 tempwork->sig = src_entry->sig;
 410                 tempwork->def_cfg = src_entry->def_cfg;
 411         } else {
 412                 /* Initialize as a "do-nothing" entry */
 413                 tempwork->pid_cmd_file = NULL;
 414                 tempwork->r_reason = NULL;
 415                 tempwork->firstcreate = 0;
 416                 tempwork->rotate = 0;
 417                 tempwork->fsize = -1;
 418                 tempwork->uid = (uid_t)-1;
 419                 tempwork->gid = (gid_t)-1;
 420                 tempwork->numlogs = 1;
 421                 tempwork->trsize = -1;
 422                 tempwork->hours = -1;
 423                 tempwork->trim_at = NULL;
 424                 tempwork->permissions = 0;
 425                 tempwork->flags = 0;
 426                 tempwork->compress = COMPRESS_NONE;
 427                 tempwork->sig = SIGHUP;
 428                 tempwork->def_cfg = 0;
 429         }
 430
 431         return (tempwork);
 432 }
 433
 434 static void
 435 free_entry(struct conf_entry *ent)
 436 {
 437
 438         if (ent == NULL)
 439                 return;
 440
 441         if (ent->log != NULL) {
 442                 if (verbose > 4)
 443                         printf("\t--> [freeing entry for %s]\n", ent->log);
 444                 free(ent->log);
 445                 ent->log = NULL;
 446         }
 447
 448         if (ent->pid_cmd_file != NULL) {
 449                 free(ent->pid_cmd_file);
 450                 ent->pid_cmd_file = NULL;
 451         }
 452
 453         if (ent->r_reason != NULL) {
 454                 free(ent->r_reason);
 455                 ent->r_reason = NULL;
 456         }
 457
 458         if (ent->trim_at != NULL) {
 459                 ptime_free(ent->trim_at);
 460                 ent->trim_at = NULL;
 461         }
 462
 463         free(ent);
 464 }
 465
 466 static void
 467 free_clist(struct cflist *list)
 468 {
 469         struct conf_entry *ent;
 470
 471         while (!STAILQ_EMPTY(list)) {
 472                 ent = STAILQ_FIRST(list);
 473                 STAILQ_REMOVE_HEAD(list, cf_nextp);
 474                 free_entry(ent);
 475         }
 476
 477         free(list);
 478         list = NULL;
 479 }
 480
 481 static fk_entry
 482 do_entry(struct conf_entry * ent)
 483 {
 484 #define REASON_MAX      80
 485         int modtime;
 486         fk_entry free_or_keep;
 487         double diffsecs;
 488         char temp_reason[REASON_MAX];
 489         int oversized;
 490
 491         free_or_keep = FREE_ENT;
 492         if (verbose)
 493                 printf("%s <%d%s>: ", ent->log, ent->numlogs,
 494                     compress_type[ent->compress].flag);
 495         ent->fsize = sizefile(ent->log);
 496         oversized = ((ent->trsize > 0) && (ent->fsize >= ent->trsize));
 497         modtime = age_old_log(ent->log);
 498         ent->rotate = 0;
 499         ent->firstcreate = 0;
 500         if (ent->fsize < 0) {
 501                 /*
 502                  * If either the C flag or the -C option was specified,
 503                  * and if we won't be creating the file, then have the
 504                  * verbose message include a hint as to why the file
 505                  * will not be created.
 506                  */
 507                 temp_reason[0] = '\0';
 508                 if (createlogs > 1)
 509                         ent->firstcreate = 1;
 510                 else if ((ent->flags & CE_CREATE) && createlogs)
 511                         ent->firstcreate = 1;
 512                 else if (ent->flags & CE_CREATE)
 513                         strlcpy(temp_reason, " (no -C option)", REASON_MAX);
 514                 else if (createlogs)
 515                         strlcpy(temp_reason, " (no C flag)", REASON_MAX);
 516
 517                 if (ent->firstcreate) {
 518                         if (verbose)
 519                                 printf("does not exist -> will create.\n");
 520                         createlog(ent);
 521                 } else if (verbose) {
 522                         printf("does not exist, skipped%s.\n", temp_reason);
 523                 }
 524         } else {
 525                 if (ent->flags & CE_TRIMAT && !force && !rotatereq &&
 526                     !oversized) {
 527                         diffsecs = ptimeget_diff(timenow, ent->trim_at);
 528                         if (diffsecs < 0.0) {
 529                                 /* trim_at is some time in the future. */
 530                                 if (verbose) {
 531                                         ptime_adjust4dst(ent->trim_at,
 532                                             timenow);
 533                                         printf("--> will trim at %s",
 534                                             ptimeget_ctime(ent->trim_at));
 535                                 }
 536                                 return (free_or_keep);
 537                         } else if (diffsecs >= 3600.0) {
 538                                 /*
 539                                  * trim_at is more than an hour in the past,
 540                                  * so find the next valid trim_at time, and
 541                                  * tell the user what that will be.
 542                                  */
 543                                 if (verbose && dbg_at_times)
 544                                         printf("\n\t--> prev trim at %s\t",
 545                                             ptimeget_ctime(ent->trim_at));
 546                                 if (verbose) {
 547                                         ptimeset_nxtime(ent->trim_at);
 548                                         printf("--> will trim at %s",
 549                                             ptimeget_ctime(ent->trim_at));
 550                                 }
 551                                 return (free_or_keep);
 552                         } else if (verbose && noaction && dbg_at_times) {
 553                                 /*
 554                                  * If we are just debugging at-times, then
 555                                  * a detailed message is helpful.  Also
 556                                  * skip "doing" any commands, since they
 557                                  * would all be turned off by no-action.
 558                                  */
 559                                 printf("\n\t--> timematch at %s",
 560                                     ptimeget_ctime(ent->trim_at));
 561                                 return (free_or_keep);
 562                         } else if (verbose && ent->hours <= 0) {
 563                                 printf("--> time is up\n");
 564                         }
 565                 }
 566                 if (verbose && (ent->trsize > 0))
 567                         printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
 568                 if (verbose && (ent->hours > 0))
 569                         printf(" age (hr): %d [%d] ", modtime, ent->hours);
 570
 571                 /*
 572                  * Figure out if this logfile needs to be rotated.
 573                  */
 574                 temp_reason[0] = '\0';
 575                 if (rotatereq) {
 576                         ent->rotate = 1;
 577                         snprintf(temp_reason, REASON_MAX, " due to -R from %s",
 578                             requestor);
 579                 } else if (force) {
 580                         ent->rotate = 1;
 581                         snprintf(temp_reason, REASON_MAX, " due to -F request");
 582                 } else if (oversized) {
 583                         ent->rotate = 1;
 584                         snprintf(temp_reason, REASON_MAX, " due to size>%dK",
 585                             ent->trsize);
 586                 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
 587                         ent->rotate = 1;
 588                 } else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
 589                     (modtime < 0))) {
 590                         ent->rotate = 1;
 591                 }
 592
 593                 /*
 594                  * If the file needs to be rotated, then rotate it.
 595                  */
 596                 if (ent->rotate && !norotate) {
 597                         if (temp_reason[0] != '\0')
 598                                 ent->r_reason = strdup(temp_reason);
 599                         if (verbose)
 600                                 printf("--> trimming log....\n");
 601                         if (noaction && !verbose)
 602                                 printf("%s <%d%s>: trimming\n", ent->log,
 603                                     ent->numlogs,
 604                                     compress_type[ent->compress].flag);
 605                         free_or_keep = do_rotate(ent);
 606                 } else {
 607                         if (verbose)
 608                                 printf("--> skipping\n");
 609                 }
 610         }
 611         return (free_or_keep);
 612 #undef REASON_MAX
 613 }
 614
 615 static void
 616 parse_args(int argc, char **argv)
 617 {
 618         int ch;
 619         char *p;
 620
 621         timenow = ptime_init(NULL);
 622         ptimeset_time(timenow, time(NULL));
 623         strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN);
 624
 625         /* Let's get our hostname */
 626         (void)gethostname(hostname, sizeof(hostname));
 627
 628         /* Truncate domain */
 629         if ((p = strchr(hostname, '.')) != NULL)
 630                 *p = '\0';
 631
 632         /* Parse command line options. */
 633         while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1)
 634                 switch (ch) {
 635                 case 'a':
 636                         archtodir++;
 637                         archdirname = optarg;
 638                         break;
 639                 case 'd':
 640                         destdir = optarg;
 641                         break;
 642                 case 'f':
 643                         conf = optarg;
 644                         break;
 645                 case 'n':
 646                         noaction++;
 647                         /* FALLTHROUGH */
 648                 case 'r':
 649                         needroot = 0;
 650                         break;
 651                 case 's':
 652                         nosignal = 1;
 653                         break;
 654                 case 't':
 655                         if (optarg[0] == '\0' ||
 656                             strcmp(optarg, "DEFAULT") == 0)
 657                                 timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT);
 658                         else
 659                                 timefnamefmt = strdup(optarg);
 660                         break;
 661                 case 'v':
 662                         verbose++;
 663                         break;
 664                 case 'C':
 665                         /* Useful for things like rc.diskless... */
 666                         createlogs++;
 667                         break;
 668                 case 'D':
 669                         /*
 670                          * Set some debugging option.  The specific option
 671                          * depends on the value of optarg.  These options
 672                          * may come and go without notice or documentation.
 673                          */
 674                         if (parse_doption(optarg))
 675                                 break;
 676                         usage();
 677                         /* NOTREACHED */
 678                 case 'F':
 679                         force++;
 680                         break;
 681                 case 'N':
 682                         norotate++;
 683                         break;
 684                 case 'P':
 685                         enforcepid++;
 686                         break;
 687                 case 'R':
 688                         rotatereq++;
 689                         requestor = strdup(optarg);
 690                         break;
 691                 case 'S':
 692                         path_syslogpid = optarg;
 693                         break;
 694                 case 'm':       /* Used by OpenBSD for "monitor mode" */
 695                 default:
 696                         usage();
 697                         /* NOTREACHED */
 698                 }
 699
 700         if (force && norotate) {
 701                 warnx("Only one of -F and -N may be specified.");
 702                 usage();
 703                 /* NOTREACHED */
 704         }
 705
 706         if (rotatereq) {
 707                 if (optind == argc) {
 708                         warnx("At least one filename must be given when -R is specified.");
 709                         usage();
 710                         /* NOTREACHED */
 711                 }
 712                 /* Make sure "requestor" value is safe for a syslog message. */
 713                 for (p = requestor; *p != '\0'; p++) {
 714                         if (!isprintch(*p) && (*p != '\t'))
 715                                 *p = '.';
 716                 }
 717         }
 718
 719         if (dbg_timenow) {
 720                 /*
 721                  * Note that the 'daytime' variable is not changed.
 722                  * That is only used in messages that track when a
 723                  * logfile is rotated, and if a file *is* rotated,
 724                  * then it will still rotated at the "real now" time.
 725                  */
 726                 ptime_free(timenow);
 727                 timenow = dbg_timenow;
 728                 fprintf(stderr, "Debug: Running as if TimeNow is %s",
 729                     ptimeget_ctime(dbg_timenow));
 730         }
 731
 732 }
 733
 734 /*
 735  * These debugging options are mainly meant for developer use, such
 736  * as writing regression-tests.  They would not be needed by users
 737  * during normal operation of newsyslog...
 738  */
 739 static int
 740 parse_doption(const char *doption)
 741 {
 742         const char TN[] = "TN=";
 743         int res;
 744
 745         if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
 746                 /*
 747                  * The "TimeNow" debugging option.  This might be off
 748                  * by an hour when crossing a timezone change.
 749                  */
 750                 dbg_timenow = ptime_init(NULL);
 751                 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
 752                     time(NULL), doption + sizeof(TN) - 1);
 753                 if (res == -2) {
 754                         warnx("Non-existent time specified on -D %s", doption);
 755                         return (0);                     /* failure */
 756                 } else if (res < 0) {
 757                         warnx("Malformed time given on -D %s", doption);
 758                         return (0);                     /* failure */
 759                 }
 760                 return (1);                     /* successfully parsed */
 761
 762         }
 763
 764         if (strcmp(doption, "ats") == 0) {
 765                 dbg_at_times++;
 766                 return (1);                     /* successfully parsed */
 767         }
 768
 769         /* XXX - This check could probably be dropped. */
 770         if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder")
 771             == 0)) {
 772                 warnx("NOTE: newsyslog always uses 'neworder'.");
 773                 return (1);                     /* successfully parsed */
 774         }
 775
 776         warnx("Unknown -D (debug) option: '%s'", doption);
 777         return (0);                             /* failure */
 778 }
 779
 780 static void
 781 usage(void)
 782 {
 783
 784         fprintf(stderr,
 785             "usage: newsyslog [-CFNPnrsv] [-a directory] [-d directory] [-f config_file]\n"
 786             "                 [-S pidfile] [-t timefmt] [[-R tagname] file ...]\n");
 787         exit(1);
 788 }
 789
 790 /*
 791  * Parse a configuration file and return a linked list of all the logs
 792  * which should be processed.
 793  */
 794 static struct cflist *
 795 get_worklist(char **files)
 796 {
 797         FILE *f;
 798         char **given;
 799         struct cflist *cmdlist, *filelist, *globlist;
 800         struct conf_entry *defconf, *dupent, *ent;
 801         struct ilist inclist;
 802         struct include_entry *inc;
 803         int gmatch, fnres;
 804
 805         defconf = NULL;
 806         STAILQ_INIT(&inclist);
 807
 808         filelist = malloc(sizeof(struct cflist));
 809         if (filelist == NULL)
 810                 err(1, "malloc of filelist");
 811         STAILQ_INIT(filelist);
 812         globlist = malloc(sizeof(struct cflist));
 813         if (globlist == NULL)
 814                 err(1, "malloc of globlist");
 815         STAILQ_INIT(globlist);
 816
 817         inc = malloc(sizeof(struct include_entry));
 818         if (inc == NULL)
 819                 err(1, "malloc of inc");
 820         inc->file = conf;
 821         if (inc->file == NULL)
 822                 inc->file = _PATH_CONF;
 823         STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp);
 824
 825         STAILQ_FOREACH(inc, &inclist, inc_nextp) {
 826                 if (strcmp(inc->file, "-") != 0)
 827                         f = fopen(inc->file, "r");
 828                 else {
 829                         f = stdin;
 830                         inc->file = "<stdin>";
 831                 }
 832                 if (!f)
 833                         err(1, "%s", inc->file);
 834
 835                 if (verbose)
 836                         printf("Processing %s\n", inc->file);
 837                 parse_file(f, filelist, globlist, defconf, &inclist);
 838                 (void) fclose(f);
 839         }
 840
 841         /*
 842          * All config-file information has been read in and turned into
 843          * a filelist and a globlist.  If there were no specific files
 844          * given on the run command, then the only thing left to do is to
 845          * call a routine which finds all files matched by the globlist
 846          * and adds them to the filelist.  Then return the worklist.
 847          */
 848         if (*files == NULL) {
 849                 expand_globs(filelist, globlist);
 850                 free_clist(globlist);
 851                 if (defconf != NULL)
 852                         free_entry(defconf);
 853                 return (filelist);
 854                 /* NOTREACHED */
 855         }
 856
 857         /*
 858          * If newsyslog was given a specific list of files to process,
 859          * it may be that some of those files were not listed in any
 860          * config file.  Those unlisted files should get the default
 861          * rotation action.  First, create the default-rotation action
 862          * if none was found in a system config file.
 863          */
 864         if (defconf == NULL) {
 865                 defconf = init_entry(DEFAULT_MARKER, NULL);
 866                 defconf->numlogs = 3;
 867                 defconf->trsize = 50;
 868                 defconf->permissions = S_IRUSR|S_IWUSR;
 869         }
 870
 871         /*
 872          * If newsyslog was run with a list of specific filenames,
 873          * then create a new worklist which has only those files in
 874          * it, picking up the rotation-rules for those files from
 875          * the original filelist.
 876          *
 877          * XXX - Note that this will copy multiple rules for a single
 878          *      logfile, if multiple entries are an exact match for
 879          *      that file.  That matches the historic behavior, but do
 880          *      we want to continue to allow it?  If so, it should
 881          *      probably be handled more intelligently.
 882          */
 883         cmdlist = malloc(sizeof(struct cflist));
 884         if (cmdlist == NULL)
 885                 err(1, "malloc of cmdlist");
 886         STAILQ_INIT(cmdlist);
 887
 888         for (given = files; *given; ++given) {
 889                 /*
 890                  * First try to find exact-matches for this given file.
 891                  */
 892                 gmatch = 0;
 893                 STAILQ_FOREACH(ent, filelist, cf_nextp) {
 894                         if (strcmp(ent->log, *given) == 0) {
 895                                 gmatch++;
 896                                 dupent = init_entry(*given, ent);
 897                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 898                         }
 899                 }
 900                 if (gmatch) {
 901                         if (verbose > 2)
 902                                 printf("\t+ Matched entry %s\n", *given);
 903                         continue;
 904                 }
 905
 906                 /*
 907                  * There was no exact-match for this given file, so look
 908                  * for a "glob" entry which does match.
 909                  */
 910                 gmatch = 0;
 911                 if (verbose > 2 && globlist != NULL)
 912                         printf("\t+ Checking globs for %s\n", *given);
 913                 STAILQ_FOREACH(ent, globlist, cf_nextp) {
 914                         fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
 915                         if (verbose > 2)
 916                                 printf("\t+    = %d for pattern %s\n", fnres,
 917                                     ent->log);
 918                         if (fnres == 0) {
 919                                 gmatch++;
 920                                 dupent = init_entry(*given, ent);
 921                                 /* This new entry is not a glob! */
 922                                 dupent->flags &= ~CE_GLOB;
 923                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 924                                 /* Only allow a match to one glob-entry */
 925                                 break;
 926                         }
 927                 }
 928                 if (gmatch) {
 929                         if (verbose > 2)
 930                                 printf("\t+ Matched %s via %s\n", *given,
 931                                     ent->log);
 932                         continue;
 933                 }
 934
 935                 /*
 936                  * This given file was not found in any config file, so
 937                  * add a worklist item based on the default entry.
 938                  */
 939                 if (verbose > 2)
 940                         printf("\t+ No entry matched %s  (will use %s)\n",
 941                             *given, DEFAULT_MARKER);
 942                 dupent = init_entry(*given, defconf);
 943                 /* Mark that it was *not* found in a config file */
 944                 dupent->def_cfg = 1;
 945                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 946         }
 947
 948         /*
 949          * Free all the entries in the original work list, the list of
 950          * glob entries, and the default entry.
 951          */
 952         free_clist(filelist);
 953         free_clist(globlist);
 954         free_entry(defconf);
 955
 956         /* And finally, return a worklist which matches the given files. */
 957         return (cmdlist);
 958 }
 959
 960 /*
 961  * Expand the list of entries with filename patterns, and add all files
 962  * which match those glob-entries onto the worklist.
 963  */
 964 static void
 965 expand_globs(struct cflist *work_p, struct cflist *glob_p)
 966 {
 967         int gmatch, gres;
 968         size_t i;
 969         char *mfname;
 970         struct conf_entry *dupent, *ent, *globent;
 971         glob_t pglob;
 972         struct stat st_fm;
 973
 974         /*
 975          * The worklist contains all fully-specified (non-GLOB) names.
 976          *
 977          * Now expand the list of filename-pattern (GLOB) entries into
 978          * a second list, which (by definition) will only match files
 979          * that already exist.  Do not add a glob-related entry for any
 980          * file which already exists in the fully-specified list.
 981          */
 982         STAILQ_FOREACH(globent, glob_p, cf_nextp) {
 983                 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
 984                 if (gres != 0) {
 985                         warn("cannot expand pattern (%d): %s", gres,
 986                             globent->log);
 987                         continue;
 988                 }
 989
 990                 if (verbose > 2)
 991                         printf("\t+ Expanding pattern %s\n", globent->log);
 992                 for (i = 0; i < pglob.gl_matchc; i++) {
 993                         mfname = pglob.gl_pathv[i];
 994
 995                         /* See if this file already has a specific entry. */
 996                         gmatch = 0;
 997                         STAILQ_FOREACH(ent, work_p, cf_nextp) {
 998                                 if (strcmp(mfname, ent->log) == 0) {
 999                                         gmatch++;
1000                                         break;
1001                                 }
1002                         }
1003                         if (gmatch)
1004                                 continue;
1005
1006                         /* Make sure the named matched is a file. */
1007                         gres = lstat(mfname, &st_fm);
1008                         if (gres != 0) {
1009                                 /* Error on a file that glob() matched?!? */
1010                                 warn("Skipping %s - lstat() error", mfname);
1011                                 continue;
1012                         }
1013                         if (!S_ISREG(st_fm.st_mode)) {
1014                                 /* We only rotate files! */
1015                                 if (verbose > 2)
1016                                         printf("\t+  . skipping %s (!file)\n",
1017                                             mfname);
1018                                 continue;
1019                         }
1020
1021                         if (verbose > 2)
1022                                 printf("\t+  . add file %s\n", mfname);
1023                         dupent = init_entry(mfname, globent);
1024                         /* This new entry is not a glob! */
1025                         dupent->flags &= ~CE_GLOB;
1026
1027                         /* Add to the worklist. */
1028                         STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp);
1029                 }
1030                 globfree(&pglob);
1031                 if (verbose > 2)
1032                         printf("\t+ Done with pattern %s\n", globent->log);
1033         }
1034 }
1035
1036 /*
1037  * Parse a configuration file and update a linked list of all the logs to
1038  * process.
1039  */
1040 static void
1041 parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
1042     struct conf_entry *defconf_p, struct ilist *inclist)
1043 {
1044         char line[BUFSIZ], *parse, *q;
1045         char *cp, *errline, *group;
1046         struct conf_entry *working;
1047         struct passwd *pwd;
1048         struct group *grp;
1049         glob_t pglob;
1050         int eol, ptm_opts, res, special;
1051         size_t i;
1052
1053         errline = NULL;
1054         while (fgets(line, BUFSIZ, cf)) {
1055                 if ((line[0] == '\n') || (line[0] == '#') ||
1056                     (strlen(line) == 0))
1057                         continue;
1058                 if (errline != NULL)
1059                         free(errline);
1060                 errline = strdup(line);
1061                 for (cp = line + 1; *cp != '\0'; cp++) {
1062                         if (*cp != '#')
1063                                 continue;
1064                         if (*(cp - 1) == '\\') {
1065                                 strcpy(cp - 1, cp);
1066                                 cp--;
1067                                 continue;
1068                         }
1069                         *cp = '\0';
1070                         break;
1071                 }
1072
1073                 q = parse = missing_field(sob(line), errline);
1074                 parse = son(line);
1075                 if (!*parse)
1076                         errx(1, "malformed line (missing fields):\n%s",
1077                             errline);
1078                 *parse = '\0';
1079
1080                 /*
1081                  * Allow people to set debug options via the config file.
1082                  * (NOTE: debug options are undocumented, and may disappear
1083                  * at any time, etc).
1084                  */
1085                 if (strcasecmp(DEBUG_MARKER, q) == 0) {
1086                         q = parse = missing_field(sob(++parse), errline);
1087                         parse = son(parse);
1088                         if (!*parse)
1089                                 warnx("debug line specifies no option:\n%s",
1090                                     errline);
1091                         else {
1092                                 *parse = '\0';
1093                                 parse_doption(q);
1094                         }
1095                         continue;
1096                 } else if (strcasecmp(INCLUDE_MARKER, q) == 0) {
1097                         if (verbose)
1098                                 printf("Found: %s", errline);
1099                         q = parse = missing_field(sob(++parse), errline);
1100                         parse = son(parse);
1101                         if (!*parse) {
1102                                 warnx("include line missing argument:\n%s",
1103                                     errline);
1104                                 continue;
1105                         }
1106
1107                         *parse = '\0';
1108
1109                         if (isglobstr(q)) {
1110                                 res = glob(q, GLOB_NOCHECK, NULL, &pglob);
1111                                 if (res != 0) {
1112                                         warn("cannot expand pattern (%d): %s",
1113                                             res, q);
1114                                         continue;
1115                                 }
1116
1117                                 if (verbose > 2)
1118                                         printf("\t+ Expanding pattern %s\n", q);
1119
1120                                 for (i = 0; i < pglob.gl_matchc; i++)
1121                                         add_to_queue(pglob.gl_pathv[i],
1122                                             inclist);
1123                                 globfree(&pglob);
1124                         } else
1125                                 add_to_queue(q, inclist);
1126                         continue;
1127                 }
1128
1129                 special = 0;
1130                 working = init_entry(q, NULL);
1131                 if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1132                         special = 1;
1133                         if (defconf_p != NULL) {
1134                                 warnx("Ignoring duplicate entry for %s!", q);
1135                                 free_entry(working);
1136                                 continue;
1137                         }
1138                         defconf_p = working;
1139                 }
1140
1141                 q = parse = missing_field(sob(++parse), errline);
1142                 parse = son(parse);
1143                 if (!*parse)
1144                         errx(1, "malformed line (missing fields):\n%s",
1145                             errline);
1146                 *parse = '\0';
1147                 if ((group = strchr(q, ':')) != NULL ||
1148                     (group = strrchr(q, '.')) != NULL) {
1149                         *group++ = '\0';
1150                         if (*q) {
1151                                 if (!(isnumberstr(q))) {
1152                                         if ((pwd = getpwnam(q)) == NULL)
1153                                                 errx(1,
1154                                      "error in config file; unknown user:\n%s",
1155                                                     errline);
1156                                         working->uid = pwd->pw_uid;
1157                                 } else
1158                                         working->uid = atoi(q);
1159                         } else
1160                                 working->uid = (uid_t)-1;
1161
1162                         q = group;
1163                         if (*q) {
1164                                 if (!(isnumberstr(q))) {
1165                                         if ((grp = getgrnam(q)) == NULL)
1166                                                 errx(1,
1167                                     "error in config file; unknown group:\n%s",
1168                                                     errline);
1169                                         working->gid = grp->gr_gid;
1170                                 } else
1171                                         working->gid = atoi(q);
1172                         } else
1173                                 working->gid = (gid_t)-1;
1174
1175                         q = parse = missing_field(sob(++parse), errline);
1176                         parse = son(parse);
1177                         if (!*parse)
1178                                 errx(1, "malformed line (missing fields):\n%s",
1179                                     errline);
1180                         *parse = '\0';
1181                 } else {
1182                         working->uid = (uid_t)-1;
1183                         working->gid = (gid_t)-1;
1184                 }
1185
1186                 if (!sscanf(q, "%o", &working->permissions))
1187                         errx(1, "error in config file; bad permissions:\n%s",
1188                             errline);
1189
1190                 q = parse = missing_field(sob(++parse), errline);
1191                 parse = son(parse);
1192                 if (!*parse)
1193                         errx(1, "malformed line (missing fields):\n%s",
1194                             errline);
1195                 *parse = '\0';
1196                 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1197                         errx(1, "error in config file; bad value for count of logs to save:\n%s",
1198                             errline);
1199
1200                 q = parse = missing_field(sob(++parse), errline);
1201                 parse = son(parse);
1202                 if (!*parse)
1203                         errx(1, "malformed line (missing fields):\n%s",
1204                             errline);
1205                 *parse = '\0';
1206                 if (isdigitch(*q))
1207                         working->trsize = atoi(q);
1208                 else if (strcmp(q, "*") == 0)
1209                         working->trsize = -1;
1210                 else {
1211                         warnx("Invalid value of '%s' for 'size' in line:\n%s",
1212                             q, errline);
1213                         working->trsize = -1;
1214                 }
1215
1216                 working->flags = 0;
1217                 working->compress = COMPRESS_NONE;
1218                 q = parse = missing_field(sob(++parse), errline);
1219                 parse = son(parse);
1220                 eol = !*parse;
1221                 *parse = '\0';
1222                 {
1223                         char *ep;
1224                         u_long ul;
1225
1226                         ul = strtoul(q, &ep, 10);
1227                         if (ep == q)
1228                                 working->hours = 0;
1229                         else if (*ep == '*')
1230                                 working->hours = -1;
1231                         else if (ul > INT_MAX)
1232                                 errx(1, "interval is too large:\n%s", errline);
1233                         else
1234                                 working->hours = ul;
1235
1236                         if (*ep == '\0' || strcmp(ep, "*") == 0)
1237                                 goto no_trimat;
1238                         if (*ep != '@' && *ep != '$')
1239                                 errx(1, "malformed interval/at:\n%s", errline);
1240
1241                         working->flags |= CE_TRIMAT;
1242                         working->trim_at = ptime_init(NULL);
1243                         ptm_opts = PTM_PARSE_ISO8601;
1244                         if (*ep == '$')
1245                                 ptm_opts = PTM_PARSE_DWM;
1246                         ptm_opts |= PTM_PARSE_MATCHDOM;
1247                         res = ptime_relparse(working->trim_at, ptm_opts,
1248                             ptimeget_secs(timenow), ep + 1);
1249                         if (res == -2)
1250                                 errx(1, "nonexistent time for 'at' value:\n%s",
1251                                     errline);
1252                         else if (res < 0)
1253                                 errx(1, "malformed 'at' value:\n%s", errline);
1254                 }
1255 no_trimat:
1256
1257                 if (eol)
1258                         q = NULL;
1259                 else {
1260                         q = parse = sob(++parse);       /* Optional field */
1261                         parse = son(parse);
1262                         if (!*parse)
1263                                 eol = 1;
1264                         *parse = '\0';
1265                 }
1266
1267                 for (; q && *q && !isspacech(*q); q++) {
1268                         switch (tolowerch(*q)) {
1269                         case 'b':
1270                                 working->flags |= CE_BINARY;
1271                                 break;
1272                         case 'c':
1273                                 /*
1274                                  * XXX -        Ick! Ugly! Remove ASAP!
1275                                  * We want `c' and `C' for "create".  But we
1276                                  * will temporarily treat `c' as `g', because
1277                                  * FreeBSD releases <= 4.8 have a typo of
1278                                  * checking  ('G' || 'c')  for CE_GLOB.
1279                                  */
1280                                 if (*q == 'c') {
1281                                         warnx("Assuming 'g' for 'c' in flags for line:\n%s",
1282                                             errline);
1283                                         warnx("The 'c' flag will eventually mean 'CREATE'");
1284                                         working->flags |= CE_GLOB;
1285                                         break;
1286                                 }
1287                                 working->flags |= CE_CREATE;
1288                                 break;
1289                         case 'd':
1290                                 working->flags |= CE_NODUMP;
1291                                 break;
1292                         case 'g':
1293                                 working->flags |= CE_GLOB;
1294                                 break;
1295                         case 'j':
1296                                 working->compress = COMPRESS_BZIP2;
1297                                 break;
1298                         case 'n':
1299                                 working->flags |= CE_NOSIGNAL;
1300                                 break;
1301                         case 'r':
1302                                 working->flags |= CE_PID2CMD;
1303                                 break;
1304                         case 'u':
1305                                 working->flags |= CE_SIGNALGROUP;
1306                                 break;
1307                         case 'w':
1308                                 /* Depreciated flag - keep for compatibility purposes */
1309                                 break;
1310                         case 'x':
1311                                 working->compress = COMPRESS_XZ;
1312                                 break;
1313                         case 'z':
1314                                 working->compress = COMPRESS_GZIP;
1315                                 break;
1316                         case '-':
1317                                 break;
1318                         case 'f':       /* Used by OpenBSD for "CE_FOLLOW" */
1319                         case 'm':       /* Used by OpenBSD for "CE_MONITOR" */
1320                         case 'p':       /* Used by NetBSD  for "CE_PLAIN0" */
1321                         default:
1322                                 errx(1, "illegal flag in config file -- %c",
1323                                     *q);
1324                         }
1325                 }
1326
1327                 if (eol)
1328                         q = NULL;
1329                 else {
1330                         q = parse = sob(++parse);       /* Optional field */
1331                         parse = son(parse);
1332                         if (!*parse)
1333                                 eol = 1;
1334                         *parse = '\0';
1335                 }
1336
1337                 working->pid_cmd_file = NULL;
1338                 if (q && *q) {
1339                         if (*q == '/')
1340                                 working->pid_cmd_file = strdup(q);
1341                         else if (isdigit(*q))
1342                                 goto got_sig;
1343                         else
1344                                 errx(1,
1345                         "illegal pid file or signal number in config file:\n%s",
1346                                     errline);
1347                 }
1348                 if (eol)
1349                         q = NULL;
1350                 else {
1351                         q = parse = sob(++parse);       /* Optional field */
1352                         *(parse = son(parse)) = '\0';
1353                 }
1354
1355                 working->sig = SIGHUP;
1356                 if (q && *q) {
1357                         if (isdigit(*q)) {
1358                 got_sig:
1359                                 working->sig = atoi(q);
1360                         } else {
1361                 err_sig:
1362                                 errx(1,
1363                                     "illegal signal number in config file:\n%s",
1364                                     errline);
1365                         }
1366                         if (working->sig < 1 || working->sig >= NSIG)
1367                                 goto err_sig;
1368                 }
1369
1370                 /*
1371                  * Finish figuring out what pid-file to use (if any) in
1372                  * later processing if this logfile needs to be rotated.
1373                  */
1374                 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1375                         /*
1376                          * This config-entry specified 'n' for nosignal,
1377                          * see if it also specified an explicit pid_cmd_file.
1378                          * This would be a pretty pointless combination.
1379                          */
1380                         if (working->pid_cmd_file != NULL) {
1381                                 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1382                                     working->pid_cmd_file, errline);
1383                                 free(working->pid_cmd_file);
1384                                 working->pid_cmd_file = NULL;
1385                         }
1386                 } else if (working->pid_cmd_file == NULL) {
1387                         /*
1388                          * This entry did not specify the 'n' flag, which
1389                          * means it should signal syslogd unless it had
1390                          * specified some other pid-file (and obviously the
1391                          * syslog pid-file will not be for a process-group).
1392                          * Also, we should only try to notify syslog if we
1393                          * are root.
1394                          */
1395                         if (working->flags & CE_SIGNALGROUP) {
1396                                 warnx("Ignoring flag 'U' in line:\n%s",
1397                                     errline);
1398                                 working->flags &= ~CE_SIGNALGROUP;
1399                         }
1400                         if (needroot)
1401                                 working->pid_cmd_file = strdup(path_syslogpid);
1402                 }
1403
1404                 /*
1405                  * Add this entry to the appropriate list of entries, unless
1406                  * it was some kind of special entry (eg: <default>).
1407                  */
1408                 if (special) {
1409                         ;                       /* Do not add to any list */
1410                 } else if (working->flags & CE_GLOB) {
1411                         STAILQ_INSERT_TAIL(glob_p, working, cf_nextp);
1412                 } else {
1413                         STAILQ_INSERT_TAIL(work_p, working, cf_nextp);
1414                 }
1415         }
1416         if (errline != NULL)
1417                 free(errline);
1418 }
1419
1420 static char *
1421 missing_field(char *p, char *errline)
1422 {
1423
1424         if (!p || !*p)
1425                 errx(1, "missing field in config file:\n%s", errline);
1426         return (p);
1427 }
1428
1429 /*
1430  * In our sort we return it in the reverse of what qsort normally
1431  * would do, as we want the newest files first.  If we have two
1432  * entries with the same time we don't really care about order.
1433  *
1434  * Support function for qsort() in delete_oldest_timelog().
1435  */
1436 static int
1437 oldlog_entry_compare(const void *a, const void *b)
1438 {
1439         const struct oldlog_entry *ola = a, *olb = b;
1440
1441         if (ola->t > olb->t)
1442                 return (-1);
1443         else if (ola->t < olb->t)
1444                 return (1);
1445         else
1446                 return (0);
1447 }
1448
1449 /*
1450  * Delete the oldest logfiles, when using time based filenames.
1451  */
1452 static void
1453 delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
1454 {
1455         char *logfname, *s, *dir, errbuf[80];
1456         int dir_fd, i, logcnt, max_logcnt, valid;
1457         struct oldlog_entry *oldlogs;
1458         size_t logfname_len;
1459         struct dirent *dp;
1460         const char *cdir;
1461         struct tm tm;
1462         DIR *dirp;
1463         int c;
1464
1465         oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry));
1466         max_logcnt = MAX_OLDLOGS;
1467         logcnt = 0;
1468
1469         if (archive_dir != NULL && archive_dir[0] != '\0')
1470                 cdir = archive_dir;
1471         else
1472                 if ((cdir = dirname(ent->log)) == NULL)
1473                         err(1, "dirname()");
1474         if ((dir = strdup(cdir)) == NULL)
1475                 err(1, "strdup()");
1476
1477         if ((s = basename(ent->log)) == NULL)
1478                 err(1, "basename()");
1479         if ((logfname = strdup(s)) == NULL)
1480                 err(1, "strdup()");
1481         logfname_len = strlen(logfname);
1482         if (strcmp(logfname, "/") == 0)
1483                 errx(1, "Invalid log filename - became '/'");
1484
1485         if (verbose > 2)
1486                 printf("Searching for old logs in %s\n", dir);
1487
1488         /* First we create a 'list' of all archived logfiles */
1489         if ((dirp = opendir(dir)) == NULL)
1490                 err(1, "Cannot open log directory '%s'", dir);
1491         dir_fd = dirfd(dirp);
1492         while ((dp = readdir(dirp)) != NULL) {
1493                 if (dp->d_type != DT_REG)
1494                         continue;
1495
1496                 /* Ignore everything but files with our logfile prefix */
1497                 if (strncmp(dp->d_name, logfname, logfname_len) != 0)
1498                         continue;
1499                 /* Ignore the actual non-rotated logfile */
1500                 if (dp->d_namlen == logfname_len)
1501                         continue;
1502                 /*
1503                  * Make sure we created have found a logfile, so the
1504                  * postfix is valid, IE format is: '.<time>(.[bg]z)?'.
1505                  */
1506                 if (dp->d_name[logfname_len] != '.') {
1507                         if (verbose)
1508                                 printf("Ignoring %s which has unexpected "
1509                                     "extension '%s'\n", dp->d_name,
1510                                     &dp->d_name[logfname_len]);
1511                         continue;
1512                 }
1513                 if ((s = strptime(&dp->d_name[logfname_len + 1],
1514                             timefnamefmt, &tm)) == NULL) {
1515                         /*
1516                          * We could special case "old" sequentially
1517                          * named logfiles here, but we do not as that
1518                          * would require special handling to decide
1519                          * which one was the oldest compared to "new"
1520                          * time based logfiles.
1521                          */
1522                         if (verbose)
1523                                 printf("Ignoring %s which does not "
1524                                     "match time format\n", dp->d_name);
1525                         continue;
1526                 }
1527
1528                 for (c = 0; c < COMPRESS_TYPES; c++)
1529                         if (strcmp(s, compress_type[c].suffix) == 0)
1530                                 valid = 1;
1531                 if (valid != 1) {
1532                         if (verbose)
1533                                 printf("Ignoring %s which has unexpected "
1534                                     "extension '%s'\n", dp->d_name, s);
1535                         continue;
1536                 }
1537
1538                 /*
1539                  * We should now have old an old rotated logfile, so
1540                  * add it to the 'list'.
1541                  */
1542                 if ((oldlogs[logcnt].t = timegm(&tm)) == -1)
1543                         err(1, "Could not convert time string to time value");
1544                 if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL)
1545                         err(1, "strdup()");
1546                 logcnt++;
1547
1548                 /*
1549                  * It is very unlikely we ever run out of space in the
1550                  * logfile array from the default size, but lets
1551                  * handle it anyway...
1552                  */
1553                 if (logcnt >= max_logcnt) {
1554                         max_logcnt *= 4;
1555                         /* Detect integer overflow */
1556                         if (max_logcnt < logcnt)
1557                                 errx(1, "Too many old logfiles found");
1558                         oldlogs = realloc(oldlogs,
1559                             max_logcnt * sizeof(struct oldlog_entry));
1560                         if (oldlogs == NULL)
1561                                 err(1, "realloc()");
1562                 }
1563         }
1564
1565         /* Second, if needed we delete oldest archived logfiles */
1566         if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) {
1567                 oldlogs = realloc(oldlogs, logcnt *
1568                     sizeof(struct oldlog_entry));
1569                 if (oldlogs == NULL)
1570                         err(1, "realloc()");
1571
1572                 /*
1573                  * We now sort the logs in the order of newest to
1574                  * oldest.  That way we can simply skip over the
1575                  * number of records we want to keep.
1576                  */
1577                 qsort(oldlogs, logcnt, sizeof(struct oldlog_entry),
1578                     oldlog_entry_compare);
1579                 for (i = ent->numlogs - 1; i < logcnt; i++) {
1580                         if (noaction)
1581                                 printf("\trm -f %s/%s\n", dir,
1582                                     oldlogs[i].fname);
1583                         else if (unlinkat(dir_fd, oldlogs[i].fname, 0) != 0) {
1584                                 snprintf(errbuf, sizeof(errbuf),
1585                                     "Could not delete old logfile '%s'",
1586                                     oldlogs[i].fname);
1587                                 perror(errbuf);
1588                         }
1589                 }
1590         } else if (verbose > 1)
1591                 printf("No old logs to delete for logfile %s\n", ent->log);
1592
1593         /* Third, cleanup */
1594         closedir(dirp);
1595         for (i = 0; i < logcnt; i++) {
1596                 assert(oldlogs[i].fname != NULL);
1597                 free(oldlogs[i].fname);
1598         }
1599         free(oldlogs);
1600         free(logfname);
1601         free(dir);
1602 }
1603
1604 /*
1605  * Generate a log filename, when using classic filenames.
1606  */
1607 static void
1608 gen_classiclog_fname(char *fname, size_t fname_sz, const char *archive_dir,
1609     const char *namepart, int numlogs_c)
1610 {
1611
1612         if (archive_dir[0] != '\0')
1613                 (void) snprintf(fname, fname_sz, "%s/%s.%d", archive_dir,
1614                     namepart, numlogs_c);
1615         else
1616                 (void) snprintf(fname, fname_sz, "%s.%d", namepart, numlogs_c);
1617 }
1618
1619 /*
1620  * Delete a rotated logfile, when using classic filenames.
1621  */
1622 static void
1623 delete_classiclog(const char *archive_dir, const char *namepart, int numlog_c)
1624 {
1625         char file1[MAXPATHLEN], zfile1[MAXPATHLEN];
1626         int c;
1627
1628         gen_classiclog_fname(file1, sizeof(file1), archive_dir, namepart,
1629             numlog_c);
1630
1631         for (c = 0; c < COMPRESS_TYPES; c++) {
1632                 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1633                     compress_type[c].suffix);
1634                 if (noaction)
1635                         printf("\trm -f %s\n", zfile1);
1636                 else
1637                         (void) unlink(zfile1);
1638         }
1639 }
1640
1641 /*
1642  * Only add to the queue if the file hasn't already been added. This is
1643  * done to prevent circular include loops.
1644  */
1645 static void
1646 add_to_queue(const char *fname, struct ilist *inclist)
1647 {
1648         struct include_entry *inc;
1649
1650         STAILQ_FOREACH(inc, inclist, inc_nextp) {
1651                 if (strcmp(fname, inc->file) == 0) {
1652                         warnx("duplicate include detected: %s", fname);
1653                         return;
1654                 }
1655         }
1656
1657         inc = malloc(sizeof(struct include_entry));
1658         if (inc == NULL)
1659                 err(1, "malloc of inc");
1660         inc->file = strdup(fname);
1661
1662         if (verbose > 2)
1663                 printf("\t+ Adding %s to the processing queue.\n", fname);
1664
1665         STAILQ_INSERT_TAIL(inclist, inc, inc_nextp);
1666 }
1667
1668 /*
1669  * Search for logfile and return its compression suffix (if supported)
1670  * The suffix detection is first-match in the order of compress_types
1671  *
1672  * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE)
1673  * a zero-length string is returned
1674  */
1675 static const char *
1676 get_logfile_suffix(const char *logfile)
1677 {
1678         struct stat st;
1679         char zfile[MAXPATHLEN];
1680         int c;
1681
1682         for (c = 0; c < COMPRESS_TYPES; c++) {
1683                 (void) strlcpy(zfile, logfile, MAXPATHLEN);
1684                 (void) strlcat(zfile, compress_type[c].suffix, MAXPATHLEN);
1685                 if (lstat(zfile, &st) == 0)
1686                         return (compress_type[c].suffix);
1687         }
1688         return (NULL);
1689 }
1690
1691 static fk_entry
1692 do_rotate(const struct conf_entry *ent)
1693 {
1694         char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1695         char file1[MAXPATHLEN], file2[MAXPATHLEN];
1696         char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1697         const char *logfile_suffix;
1698         char datetimestr[30];
1699         int flags, numlogs_c;
1700         fk_entry free_or_keep;
1701         struct sigwork_entry *swork;
1702         struct stat st;
1703         struct tm tm;
1704         time_t now;
1705
1706         flags = ent->flags;
1707         free_or_keep = FREE_ENT;
1708
1709         if (archtodir) {
1710                 char *p;
1711
1712                 /* build complete name of archive directory into dirpart */
1713                 if (*archdirname == '/') {      /* absolute */
1714                         strlcpy(dirpart, archdirname, sizeof(dirpart));
1715                 } else {        /* relative */
1716                         /* get directory part of logfile */
1717                         strlcpy(dirpart, ent->log, sizeof(dirpart));
1718                         if ((p = strrchr(dirpart, '/')) == NULL)
1719                                 dirpart[0] = '\0';
1720                         else
1721                                 *(p + 1) = '\0';
1722                         strlcat(dirpart, archdirname, sizeof(dirpart));
1723                 }
1724
1725                 /* check if archive directory exists, if not, create it */
1726                 if (lstat(dirpart, &st))
1727                         createdir(ent, dirpart);
1728
1729                 /* get filename part of logfile */
1730                 if ((p = strrchr(ent->log, '/')) == NULL)
1731                         strlcpy(namepart, ent->log, sizeof(namepart));
1732                 else
1733                         strlcpy(namepart, p + 1, sizeof(namepart));
1734         } else {
1735                 /*
1736                  * Tell utility functions we are not using an archive
1737                  * dir.
1738                  */
1739                 dirpart[0] = '\0';
1740                 strlcpy(namepart, ent->log, sizeof(namepart));
1741         }
1742
1743         /* Delete old logs */
1744         if (timefnamefmt != NULL)
1745                 delete_oldest_timelog(ent, dirpart);
1746         else {
1747                 /*
1748                  * Handle cleaning up after legacy newsyslog where we
1749                  * kept ent->numlogs + 1 files.  This code can go away
1750                  * at some point in the future.
1751                  */
1752                 delete_classiclog(dirpart, namepart, ent->numlogs);
1753
1754                 if (ent->numlogs > 0)
1755                         delete_classiclog(dirpart, namepart, ent->numlogs - 1);
1756
1757         }
1758
1759         if (timefnamefmt != NULL) {
1760                 /* If time functions fails we can't really do any sensible */
1761                 if (time(&now) == (time_t)-1 ||
1762                     localtime_r(&now, &tm) == NULL)
1763                         bzero(&tm, sizeof(tm));
1764
1765                 strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm);
1766                 if (archtodir)
1767                         (void) snprintf(file1, sizeof(file1), "%s/%s.%s",
1768                             dirpart, namepart, datetimestr);
1769                 else
1770                         (void) snprintf(file1, sizeof(file1), "%s.%s",
1771                             ent->log, datetimestr);
1772
1773                 /* Don't run the code to move down logs */
1774                 numlogs_c = -1;
1775         } else {
1776                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1777                     ent->numlogs - 1);
1778                 numlogs_c = ent->numlogs - 2;           /* copy for countdown */
1779         }
1780
1781         /* Move down log files */
1782         for (; numlogs_c >= 0; numlogs_c--) {
1783                 (void) strlcpy(file2, file1, sizeof(file2));
1784
1785                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1786                     numlogs_c);
1787
1788                 logfile_suffix = get_logfile_suffix(file1);
1789                 if (logfile_suffix == NULL)
1790                         continue;
1791                 (void) strlcpy(zfile1, file1, MAXPATHLEN);
1792                 (void) strlcpy(zfile2, file2, MAXPATHLEN);
1793                 (void) strlcat(zfile1, logfile_suffix, MAXPATHLEN);
1794                 (void) strlcat(zfile2, logfile_suffix, MAXPATHLEN);
1795
1796                 if (noaction)
1797                         printf("\tmv %s %s\n", zfile1, zfile2);
1798                 else {
1799                         /* XXX - Ought to be checking for failure! */
1800                         (void)rename(zfile1, zfile2);
1801                 }
1802                 change_attrs(zfile2, ent);
1803         }
1804
1805         if (ent->numlogs > 0) {
1806                 if (noaction) {
1807                         /*
1808                          * Note that savelog() may succeed with using link()
1809                          * for the archtodir case, but there is no good way
1810                          * of knowing if it will when doing "noaction", so
1811                          * here we claim that it will have to do a copy...
1812                          */
1813                         if (archtodir)
1814                                 printf("\tcp %s %s\n", ent->log, file1);
1815                         else
1816                                 printf("\tln %s %s\n", ent->log, file1);
1817                         printf("\ttouch %s\t\t"
1818                             "# Update mtime for 'when'-interval processing\n",
1819                             file1);
1820                 } else {
1821                         if (!(flags & CE_BINARY)) {
1822                                 /* Report the trimming to the old log */
1823                                 log_trim(ent->log, ent);
1824                         }
1825                         savelog(ent->log, file1);
1826                         /*
1827                          * Interval-based rotations are done using the mtime of
1828                          * the most recently archived log, so make sure it gets
1829                          * updated during a rotation.
1830                          */
1831                         utimes(file1, NULL);
1832                 }
1833                 change_attrs(file1, ent);
1834         }
1835
1836         /* Create the new log file and move it into place */
1837         if (noaction)
1838                 printf("Start new log...\n");
1839         createlog(ent);
1840
1841         /*
1842          * Save all signalling and file-compression to be done after log
1843          * files from all entries have been rotated.  This way any one
1844          * process will not be sent the same signal multiple times when
1845          * multiple log files had to be rotated.
1846          */
1847         swork = NULL;
1848         if (ent->pid_cmd_file != NULL)
1849                 swork = save_sigwork(ent);
1850         if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) {
1851                 /*
1852                  * The zipwork_entry will include a pointer to this
1853                  * conf_entry, so the conf_entry should not be freed.
1854                  */
1855                 free_or_keep = KEEP_ENT;
1856                 save_zipwork(ent, swork, ent->fsize, file1);
1857         }
1858
1859         return (free_or_keep);
1860 }
1861
1862 static void
1863 do_sigwork(struct sigwork_entry *swork)
1864 {
1865         struct sigwork_entry *nextsig;
1866         int kres, secs;
1867         char *tmp;
1868
1869         if (swork->sw_runcmd == 0 && (!(swork->sw_pidok) || swork->sw_pid == 0))
1870                 return;                 /* no work to do... */
1871
1872         /*
1873          * If nosignal (-s) was specified, then do not signal any process.
1874          * Note that a nosignal request triggers a warning message if the
1875          * rotated logfile needs to be compressed, *unless* -R was also
1876          * specified.  We assume that an `-sR' request came from a process
1877          * which writes to the logfile, and as such, we assume that process
1878          * has already made sure the logfile is not presently in use.  This
1879          * just sets swork->sw_pidok to a special value, and do_zipwork
1880          * will print any necessary warning(s).
1881          */
1882         if (nosignal) {
1883                 if (!rotatereq)
1884                         swork->sw_pidok = -1;
1885                 return;
1886         }
1887
1888         /*
1889          * Compute the pause between consecutive signals.  Use a longer
1890          * sleep time if we will be sending two signals to the same
1891          * deamon or process-group.
1892          */
1893         secs = 0;
1894         nextsig = SLIST_NEXT(swork, sw_nextp);
1895         if (nextsig != NULL) {
1896                 if (swork->sw_pid == nextsig->sw_pid)
1897                         secs = 10;
1898                 else
1899                         secs = 1;
1900         }
1901
1902         if (noaction) {
1903                 if (swork->sw_runcmd)
1904                         printf("\tsh -c '%s %d'\n", swork->sw_fname,
1905                             swork->sw_signum);
1906                 else {
1907                         printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1908                             (int)swork->sw_pid, swork->sw_fname);
1909                         if (secs > 0)
1910                                 printf("\tsleep %d\n", secs);
1911                 }
1912                 return;
1913         }
1914
1915         if (swork->sw_runcmd) {
1916                 asprintf(&tmp, "%s %d", swork->sw_fname, swork->sw_signum);
1917                 if (tmp == NULL) {
1918                         warn("can't allocate memory to run %s",
1919                             swork->sw_fname);
1920                         return;
1921                 }
1922                 if (verbose)
1923                         printf("Run command: %s\n", tmp);
1924                 kres = system(tmp);
1925                 if (kres) {
1926                         warnx("%s: returned non-zero exit code: %d",
1927                             tmp, kres);
1928                 }
1929                 free(tmp);
1930                 return;
1931         }
1932
1933         kres = kill(swork->sw_pid, swork->sw_signum);
1934         if (kres != 0) {
1935                 /*
1936                  * Assume that "no such process" (ESRCH) is something
1937                  * to warn about, but is not an error.  Presumably the
1938                  * process which writes to the rotated log file(s) is
1939                  * gone, in which case we should have no problem with
1940                  * compressing the rotated log file(s).
1941                  */
1942                 if (errno != ESRCH)
1943                         swork->sw_pidok = 0;
1944                 warn("can't notify %s, pid %d", swork->sw_pidtype,
1945                     (int)swork->sw_pid);
1946         } else {
1947                 if (verbose)
1948                         printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
1949                             (int)swork->sw_pid, swork->sw_fname);
1950                 if (secs > 0) {
1951                         if (verbose)
1952                                 printf("Pause %d second(s) between signals\n",
1953                                     secs);
1954                         sleep(secs);
1955                 }
1956         }
1957 }
1958
1959 static void
1960 do_zipwork(struct zipwork_entry *zwork)
1961 {
1962         const char *pgm_name, *pgm_path;
1963         int errsav, fcount, zstatus;
1964         pid_t pidzip, wpid;
1965         char zresult[MAXPATHLEN];
1966         int c;
1967
1968         assert(zwork != NULL);
1969         pgm_path = NULL;
1970         strlcpy(zresult, zwork->zw_fname, sizeof(zresult));
1971         if (zwork->zw_conf != NULL &&
1972             zwork->zw_conf->compress > COMPRESS_NONE)
1973                 for (c = 1; c < COMPRESS_TYPES; c++) {
1974                         if (zwork->zw_conf->compress == c) {
1975                                 pgm_path = compress_type[c].path;
1976                                 (void) strlcat(zresult,
1977                                     compress_type[c].suffix, sizeof(zresult));
1978                                 break;
1979                         }
1980                 }
1981         if (pgm_path == NULL) {
1982                 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname);
1983                 return;
1984         }
1985         pgm_name = strrchr(pgm_path, '/');
1986         if (pgm_name == NULL)
1987                 pgm_name = pgm_path;
1988         else
1989                 pgm_name++;
1990
1991         if (zwork->zw_swork != NULL && zwork->zw_swork->sw_runcmd == 0 &&
1992             zwork->zw_swork->sw_pidok <= 0) {
1993                 warnx(
1994                     "log %s not compressed because daemon(s) not notified",
1995                     zwork->zw_fname);
1996                 change_attrs(zwork->zw_fname, zwork->zw_conf);
1997                 return;
1998         }
1999
2000         if (noaction) {
2001                 printf("\t%s %s\n", pgm_name, zwork->zw_fname);
2002                 change_attrs(zresult, zwork->zw_conf);
2003                 return;
2004         }
2005
2006         fcount = 1;
2007         pidzip = fork();
2008         while (pidzip < 0) {
2009                 /*
2010                  * The fork failed.  If the failure was due to a temporary
2011                  * problem, then wait a short time and try it again.
2012                  */
2013                 errsav = errno;
2014                 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname);
2015                 if (errsav != EAGAIN || fcount > 5)
2016                         errx(1, "Exiting...");
2017                 sleep(fcount * 12);
2018                 fcount++;
2019                 pidzip = fork();
2020         }
2021         if (!pidzip) {
2022                 /* The child process executes the compression command */
2023                 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0);
2024                 err(1, "execl(`%s -f %s')", pgm_path, zwork->zw_fname);
2025         }
2026
2027         wpid = waitpid(pidzip, &zstatus, 0);
2028         if (wpid == -1) {
2029                 /* XXX - should this be a fatal error? */
2030                 warn("%s: waitpid(%d)", pgm_path, pidzip);
2031                 return;
2032         }
2033         if (!WIFEXITED(zstatus)) {
2034                 warnx("`%s -f %s' did not terminate normally", pgm_name,
2035                     zwork->zw_fname);
2036                 return;
2037         }
2038         if (WEXITSTATUS(zstatus)) {
2039                 warnx("`%s -f %s' terminated with a non-zero status (%d)",
2040                     pgm_name, zwork->zw_fname, WEXITSTATUS(zstatus));
2041                 return;
2042         }
2043
2044         /* Compression was successful, set file attributes on the result. */
2045         change_attrs(zresult, zwork->zw_conf);
2046 }
2047
2048 /*
2049  * Save information on any process we need to signal.  Any single
2050  * process may need to be sent different signal-values for different
2051  * log files, but usually a single signal-value will cause the process
2052  * to close and re-open all of it's log files.
2053  */
2054 static struct sigwork_entry *
2055 save_sigwork(const struct conf_entry *ent)
2056 {
2057         struct sigwork_entry *sprev, *stmp;
2058         int ndiff;
2059         size_t tmpsiz;
2060
2061         sprev = NULL;
2062         ndiff = 1;
2063         SLIST_FOREACH(stmp, &swhead, sw_nextp) {
2064                 ndiff = strcmp(ent->pid_cmd_file, stmp->sw_fname);
2065                 if (ndiff > 0)
2066                         break;
2067                 if (ndiff == 0) {
2068                         if (ent->sig == stmp->sw_signum)
2069                                 break;
2070                         if (ent->sig > stmp->sw_signum) {
2071                                 ndiff = 1;
2072                                 break;
2073                         }
2074                 }
2075                 sprev = stmp;
2076         }
2077         if (stmp != NULL && ndiff == 0)
2078                 return (stmp);
2079
2080         tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_cmd_file) + 1;
2081         stmp = malloc(tmpsiz);
2082
2083         stmp->sw_runcmd = 0;
2084         /* If this is a command to run we just set the flag and run command */
2085         if (ent->flags & CE_PID2CMD) {
2086                 stmp->sw_pid = -1;
2087                 stmp->sw_pidok = 0;
2088                 stmp->sw_runcmd = 1;
2089         } else {
2090                 set_swpid(stmp, ent);
2091         }
2092         stmp->sw_signum = ent->sig;
2093         strcpy(stmp->sw_fname, ent->pid_cmd_file);
2094         if (sprev == NULL)
2095                 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
2096         else
2097                 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
2098         return (stmp);
2099 }
2100
2101 /*
2102  * Save information on any file we need to compress.  We may see the same
2103  * file multiple times, so check the full list to avoid duplicates.  The
2104  * list itself is sorted smallest-to-largest, because that's the order we
2105  * want to compress the files.  If the partition is very low on disk space,
2106  * then the smallest files are the most likely to compress, and compressing
2107  * them first will free up more space for the larger files.
2108  */
2109 static struct zipwork_entry *
2110 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
2111     int zsize, const char *zipfname)
2112 {
2113         struct zipwork_entry *zprev, *ztmp;
2114         int ndiff;
2115         size_t tmpsiz;
2116
2117         /* Compute the size if the caller did not know it. */
2118         if (zsize < 0)
2119                 zsize = sizefile(zipfname);
2120
2121         zprev = NULL;
2122         ndiff = 1;
2123         SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
2124                 ndiff = strcmp(zipfname, ztmp->zw_fname);
2125                 if (ndiff == 0)
2126                         break;
2127                 if (zsize > ztmp->zw_fsize)
2128                         zprev = ztmp;
2129         }
2130         if (ztmp != NULL && ndiff == 0)
2131                 return (ztmp);
2132
2133         tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
2134         ztmp = malloc(tmpsiz);
2135         ztmp->zw_conf = ent;
2136         ztmp->zw_swork = swork;
2137         ztmp->zw_fsize = zsize;
2138         strcpy(ztmp->zw_fname, zipfname);
2139         if (zprev == NULL)
2140                 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
2141         else
2142                 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
2143         return (ztmp);
2144 }
2145
2146 /* Send a signal to the pid specified by pidfile */
2147 static void
2148 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
2149 {
2150         FILE *f;
2151         long minok, maxok, rval;
2152         char *endp, *linep, line[BUFSIZ];
2153
2154         minok = MIN_PID;
2155         maxok = MAX_PID;
2156         swork->sw_pidok = 0;
2157         swork->sw_pid = 0;
2158         swork->sw_pidtype = "daemon";
2159         if (ent->flags & CE_SIGNALGROUP) {
2160                 /*
2161                  * If we are expected to signal a process-group when
2162                  * rotating this logfile, then the value read in should
2163                  * be the negative of a valid process ID.
2164                  */
2165                 minok = -MAX_PID;
2166                 maxok = -MIN_PID;
2167                 swork->sw_pidtype = "process-group";
2168         }
2169
2170         f = fopen(ent->pid_cmd_file, "r");
2171         if (f == NULL) {
2172                 if (errno == ENOENT && enforcepid == 0) {
2173                         /*
2174                          * Warn if the PID file doesn't exist, but do
2175                          * not consider it an error.  Most likely it
2176                          * means the process has been terminated,
2177                          * so it should be safe to rotate any log
2178                          * files that the process would have been using.
2179                          */
2180                         swork->sw_pidok = 1;
2181                         warnx("pid file doesn't exist: %s", ent->pid_cmd_file);
2182                 } else
2183                         warn("can't open pid file: %s", ent->pid_cmd_file);
2184                 return;
2185         }
2186
2187         if (fgets(line, BUFSIZ, f) == NULL) {
2188                 /*
2189                  * Warn if the PID file is empty, but do not consider
2190                  * it an error.  Most likely it means the process has
2191                  * has terminated, so it should be safe to rotate any
2192                  * log files that the process would have been using.
2193                  */
2194                 if (feof(f) && enforcepid == 0) {
2195                         swork->sw_pidok = 1;
2196                         warnx("pid/cmd file is empty: %s", ent->pid_cmd_file);
2197                 } else
2198                         warn("can't read from pid file: %s", ent->pid_cmd_file);
2199                 (void)fclose(f);
2200                 return;
2201         }
2202         (void)fclose(f);
2203
2204         errno = 0;
2205         linep = line;
2206         while (*linep == ' ')
2207                 linep++;
2208         rval = strtol(linep, &endp, 10);
2209         if (*endp != '\0' && !isspacech(*endp)) {
2210                 warnx("pid file does not start with a valid number: %s",
2211                     ent->pid_cmd_file);
2212         } else if (rval < minok || rval > maxok) {
2213                 warnx("bad value '%ld' for process number in %s",
2214                     rval, ent->pid_cmd_file);
2215                 if (verbose)
2216                         warnx("\t(expecting value between %ld and %ld)",
2217                             minok, maxok);
2218         } else {
2219                 swork->sw_pidok = 1;
2220                 swork->sw_pid = rval;
2221         }
2222
2223         return;
2224 }
2225
2226 /* Log the fact that the logs were turned over */
2227 static int
2228 log_trim(const char *logname, const struct conf_entry *log_ent)
2229 {
2230         FILE *f;
2231         const char *xtra;
2232
2233         if ((f = fopen(logname, "a")) == NULL)
2234                 return (-1);
2235         xtra = "";
2236         if (log_ent->def_cfg)
2237                 xtra = " using <default> rule";
2238         if (log_ent->firstcreate)
2239                 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n",
2240                     daytime, hostname, (int) getpid(), xtra);
2241         else if (log_ent->r_reason != NULL)
2242                 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n",
2243                     daytime, hostname, (int) getpid(), log_ent->r_reason, xtra);
2244         else
2245                 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n",
2246                     daytime, hostname, (int) getpid(), xtra);
2247         if (fclose(f) == EOF)
2248                 err(1, "log_trim: fclose");
2249         return (0);
2250 }
2251
2252 /* Return size in kilobytes of a file */
2253 static int
2254 sizefile(const char *file)
2255 {
2256         struct stat sb;
2257
2258         if (stat(file, &sb) < 0)
2259                 return (-1);
2260         return (kbytes(dbtob(sb.st_blocks)));
2261 }
2262
2263 /* Return the age of old log file (file.0) */
2264 static int
2265 age_old_log(char *file)
2266 {
2267         struct stat sb;
2268         const char *logfile_suffix;
2269         char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1];
2270
2271         if (archtodir) {
2272                 char *p;
2273
2274                 /* build name of archive directory into tmp */
2275                 if (*archdirname == '/') {      /* absolute */
2276                         strlcpy(tmp, archdirname, sizeof(tmp));
2277                 } else {        /* relative */
2278                         /* get directory part of logfile */
2279                         strlcpy(tmp, file, sizeof(tmp));
2280                         if ((p = strrchr(tmp, '/')) == NULL)
2281                                 tmp[0] = '\0';
2282                         else
2283                                 *(p + 1) = '\0';
2284                         strlcat(tmp, archdirname, sizeof(tmp));
2285                 }
2286
2287                 strlcat(tmp, "/", sizeof(tmp));
2288
2289                 /* get filename part of logfile */
2290                 if ((p = strrchr(file, '/')) == NULL)
2291                         strlcat(tmp, file, sizeof(tmp));
2292                 else
2293                         strlcat(tmp, p + 1, sizeof(tmp));
2294         } else {
2295                 (void) strlcpy(tmp, file, sizeof(tmp));
2296         }
2297
2298         strlcat(tmp, ".0", sizeof(tmp));
2299         logfile_suffix = get_logfile_suffix(tmp);
2300         if (logfile_suffix == NULL)
2301                 return (-1);
2302         (void) strlcat(tmp, logfile_suffix, sizeof(tmp));
2303         if (stat(tmp, &sb) < 0)
2304                 return (-1);
2305         return ((int)(ptimeget_secs(timenow) - sb.st_mtime + 1800) / 3600);
2306 }
2307
2308 /* Skip Over Blanks */
2309 static char *
2310 sob(char *p)
2311 {
2312         while (p && *p && isspace(*p))
2313                 p++;
2314         return (p);
2315 }
2316
2317 /* Skip Over Non-Blanks */
2318 static char *
2319 son(char *p)
2320 {
2321         while (p && *p && !isspace(*p))
2322                 p++;
2323         return (p);
2324 }
2325
2326 /* Check if string is actually a number */
2327 static int
2328 isnumberstr(const char *string)
2329 {
2330         while (*string) {
2331                 if (!isdigitch(*string++))
2332                         return (0);
2333         }
2334         return (1);
2335 }
2336
2337 /* Check if string contains a glob */
2338 static int
2339 isglobstr(const char *string)
2340 {
2341         char chr;
2342
2343         while ((chr = *string++)) {
2344                 if (chr == '*' || chr == '?' || chr == '[')
2345                         return (1);
2346         }
2347         return (0);
2348 }
2349
2350 /*
2351  * Save the active log file under a new name.  A link to the new name
2352  * is the quick-and-easy way to do this.  If that fails (which it will
2353  * if the destination is on another partition), then make a copy of
2354  * the file to the new location.
2355  */
2356 static void
2357 savelog(char *from, char *to)
2358 {
2359         FILE *src, *dst;
2360         int c, res;
2361
2362         res = link(from, to);
2363         if (res == 0)
2364                 return;
2365
2366         if ((src = fopen(from, "r")) == NULL)
2367                 err(1, "can't fopen %s for reading", from);
2368         if ((dst = fopen(to, "w")) == NULL)
2369                 err(1, "can't fopen %s for writing", to);
2370
2371         while ((c = getc(src)) != EOF) {
2372                 if ((putc(c, dst)) == EOF)
2373                         err(1, "error writing to %s", to);
2374         }
2375
2376         if (ferror(src))
2377                 err(1, "error reading from %s", from);
2378         if ((fclose(src)) != 0)
2379                 err(1, "can't fclose %s", to);
2380         if ((fclose(dst)) != 0)
2381                 err(1, "can't fclose %s", from);
2382 }
2383
2384 /* create one or more directory components of a path */
2385 static void
2386 createdir(const struct conf_entry *ent, char *dirpart)
2387 {
2388         int res;
2389         char *s, *d;
2390         char mkdirpath[MAXPATHLEN];
2391         struct stat st;
2392
2393         s = dirpart;
2394         d = mkdirpath;
2395
2396         for (;;) {
2397                 *d++ = *s++;
2398                 if (*s != '/' && *s != '\0')
2399                         continue;
2400                 *d = '\0';
2401                 res = lstat(mkdirpath, &st);
2402                 if (res != 0) {
2403                         if (noaction) {
2404                                 printf("\tmkdir %s\n", mkdirpath);
2405                         } else {
2406                                 res = mkdir(mkdirpath, 0755);
2407                                 if (res != 0)
2408                                         err(1, "Error on mkdir(\"%s\") for -a",
2409                                             mkdirpath);
2410                         }
2411                 }
2412                 if (*s == '\0')
2413                         break;
2414         }
2415         if (verbose) {
2416                 if (ent->firstcreate)
2417                         printf("Created directory '%s' for new %s\n",
2418                             dirpart, ent->log);
2419                 else
2420                         printf("Created directory '%s' for -a\n", dirpart);
2421         }
2422 }
2423
2424 /*
2425  * Create a new log file, destroying any currently-existing version
2426  * of the log file in the process.  If the caller wants a backup copy
2427  * of the file to exist, they should call 'link(logfile,logbackup)'
2428  * before calling this routine.
2429  */
2430 void
2431 createlog(const struct conf_entry *ent)
2432 {
2433         int fd, failed;
2434         struct stat st;
2435         char *realfile, *slash, tempfile[MAXPATHLEN];
2436
2437         fd = -1;
2438         realfile = ent->log;
2439
2440         /*
2441          * If this log file is being created for the first time (-C option),
2442          * then it may also be true that the parent directory does not exist
2443          * yet.  Check, and create that directory if it is missing.
2444          */
2445         if (ent->firstcreate) {
2446                 strlcpy(tempfile, realfile, sizeof(tempfile));
2447                 slash = strrchr(tempfile, '/');
2448                 if (slash != NULL) {
2449                         *slash = '\0';
2450                         failed = stat(tempfile, &st);
2451                         if (failed && errno != ENOENT)
2452                                 err(1, "Error on stat(%s)", tempfile);
2453                         if (failed)
2454                                 createdir(ent, tempfile);
2455                         else if (!S_ISDIR(st.st_mode))
2456                                 errx(1, "%s exists but is not a directory",
2457                                     tempfile);
2458                 }
2459         }
2460
2461         /*
2462          * First create an unused filename, so it can be chown'ed and
2463          * chmod'ed before it is moved into the real location.  mkstemp
2464          * will create the file mode=600 & owned by us.  Note that all
2465          * temp files will have a suffix of '.z<something>'.
2466          */
2467         strlcpy(tempfile, realfile, sizeof(tempfile));
2468         strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2469         if (noaction)
2470                 printf("\tmktemp %s\n", tempfile);
2471         else {
2472                 fd = mkstemp(tempfile);
2473                 if (fd < 0)
2474                         err(1, "can't mkstemp logfile %s", tempfile);
2475
2476                 /*
2477                  * Add status message to what will become the new log file.
2478                  */
2479                 if (!(ent->flags & CE_BINARY)) {
2480                         if (log_trim(tempfile, ent))
2481                                 err(1, "can't add status message to log");
2482                 }
2483         }
2484
2485         /* Change the owner/group, if we are supposed to */
2486         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2487                 if (noaction)
2488                         printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2489                             tempfile);
2490                 else {
2491                         failed = fchown(fd, ent->uid, ent->gid);
2492                         if (failed)
2493                                 err(1, "can't fchown temp file %s", tempfile);
2494                 }
2495         }
2496
2497         /* Turn on NODUMP if it was requested in the config-file. */
2498         if (ent->flags & CE_NODUMP) {
2499                 if (noaction)
2500                         printf("\tchflags nodump %s\n", tempfile);
2501                 else {
2502                         failed = fchflags(fd, UF_NODUMP);
2503                         if (failed) {
2504                                 warn("log_trim: fchflags(NODUMP)");
2505                         }
2506                 }
2507         }
2508
2509         /*
2510          * Note that if the real logfile still exists, and if the call
2511          * to rename() fails, then "neither the old file nor the new
2512          * file shall be changed or created" (to quote the standard).
2513          * If the call succeeds, then the file will be replaced without
2514          * any window where some other process might find that the file
2515          * did not exist.
2516          * XXX - ? It may be that for some error conditions, we could
2517          *      retry by first removing the realfile and then renaming.
2518          */
2519         if (noaction) {
2520                 printf("\tchmod %o %s\n", ent->permissions, tempfile);
2521                 printf("\tmv %s %s\n", tempfile, realfile);
2522         } else {
2523                 failed = fchmod(fd, ent->permissions);
2524                 if (failed)
2525                         err(1, "can't fchmod temp file '%s'", tempfile);
2526                 failed = rename(tempfile, realfile);
2527                 if (failed)
2528                         err(1, "can't mv %s to %s", tempfile, realfile);
2529         }
2530
2531         if (fd >= 0)
2532                 close(fd);
2533 }
2534
2535 /*
2536  * Change the attributes of a given filename to what was specified in
2537  * the newsyslog.conf entry.  This routine is only called for files
2538  * that newsyslog expects that it has created, and thus it is a fatal
2539  * error if this routine finds that the file does not exist.
2540  */
2541 static void
2542 change_attrs(const char *fname, const struct conf_entry *ent)
2543 {
2544         int failed;
2545
2546         if (noaction) {
2547                 printf("\tchmod %o %s\n", ent->permissions, fname);
2548
2549                 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2550                         printf("\tchown %u:%u %s\n",
2551                             ent->uid, ent->gid, fname);
2552
2553                 if (ent->flags & CE_NODUMP)
2554                         printf("\tchflags nodump %s\n", fname);
2555                 return;
2556         }
2557
2558         failed = chmod(fname, ent->permissions);
2559         if (failed) {
2560                 if (errno != EPERM)
2561                         err(1, "chmod(%s) in change_attrs", fname);
2562                 warn("change_attrs couldn't chmod(%s)", fname);
2563         }
2564
2565         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2566                 failed = chown(fname, ent->uid, ent->gid);
2567                 if (failed)
2568                         warn("can't chown %s", fname);
2569         }
2570
2571         if (ent->flags & CE_NODUMP) {
2572                 failed = chflags(fname, UF_NODUMP);
2573                 if (failed)
2574                         warn("can't chflags %s NODUMP", fname);
2575         }
2576 }