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 <syslog.h>
  83 #include <time.h>
  84 #include <unistd.h>
  85
  86 #include "pathnames.h"
  87 #include "extern.h"
  88
  89 /*
  90  * Compression suffixes
  91  */
  92 #ifndef COMPRESS_SUFFIX_GZ
  93 #define COMPRESS_SUFFIX_GZ      ".gz"
  94 #endif
  95
  96 #ifndef COMPRESS_SUFFIX_BZ2
  97 #define COMPRESS_SUFFIX_BZ2     ".bz2"
  98 #endif
  99
 100 #ifndef COMPRESS_SUFFIX_XZ
 101 #define COMPRESS_SUFFIX_XZ      ".xz"
 102 #endif
 103
 104 #ifndef COMPRESS_SUFFIX_ZST
 105 #define COMPRESS_SUFFIX_ZST     ".zst"
 106 #endif
 107
 108 #define COMPRESS_SUFFIX_MAXLEN  MAX(MAX(sizeof(COMPRESS_SUFFIX_GZ),sizeof(COMPRESS_SUFFIX_BZ2)),sizeof(COMPRESS_SUFFIX_XZ))
 109
 110 /*
 111  * Compression types
 112  */
 113 #define COMPRESS_TYPES  5       /* Number of supported compression types */
 114
 115 #define COMPRESS_NONE   0
 116 #define COMPRESS_GZIP   1
 117 #define COMPRESS_BZIP2  2
 118 #define COMPRESS_XZ     3
 119 #define COMPRESS_ZSTD   4
 120
 121 /*
 122  * Bit-values for the 'flags' parsed from a config-file entry.
 123  */
 124 #define CE_BINARY       0x0008  /* Logfile is in binary, do not add status */
 125                                 /*    messages to logfile(s) when rotating. */
 126 #define CE_NOSIGNAL     0x0010  /* There is no process to signal when */
 127                                 /*    trimming this file. */
 128 #define CE_TRIMAT       0x0020  /* trim file at a specific time. */
 129 #define CE_GLOB         0x0040  /* name of the log is file name pattern. */
 130 #define CE_SIGNALGROUP  0x0080  /* Signal a process-group instead of a single */
 131                                 /*    process when trimming this file. */
 132 #define CE_CREATE       0x0100  /* Create the log file if it does not exist. */
 133 #define CE_NODUMP       0x0200  /* Set 'nodump' on newly created log file. */
 134 #define CE_PID2CMD      0x0400  /* Replace PID file with a shell command.*/
 135 #define CE_PLAIN0       0x0800  /* Do not compress zero'th history file */
 136
 137 #define CE_RFC5424      0x0800  /* Use RFC5424 format rotation message */
 138
 139 #define MIN_PID         5       /* Don't touch pids lower than this */
 140 #define MAX_PID         99999   /* was lower, see /usr/include/sys/proc.h */
 141
 142 #define kbytes(size)  (((size) + 1023) >> 10)
 143
 144 #define DEFAULT_MARKER  "<default>"
 145 #define DEBUG_MARKER    "<debug>"
 146 #define INCLUDE_MARKER  "<include>"
 147 #define DEFAULT_TIMEFNAME_FMT   "%Y%m%dT%H%M%S"
 148
 149 #define MAX_OLDLOGS 65536       /* Default maximum number of old logfiles */
 150
 151 struct compress_types {
 152         const char *flag;       /* Flag in configuration file */
 153         const char *suffix;     /* Compression suffix */
 154         const char *path;       /* Path to compression program */
 155         char **args;            /* Compression program arguments */
 156 };
 157
 158 static char f_arg[] = "-f";
 159 static char q_arg[] = "-q";
 160 static char rm_arg[] = "--rm";
 161 static char *gz_args[] ={ NULL, f_arg, NULL, NULL };
 162 #define bzip2_args gz_args
 163 #define xz_args gz_args
 164 static char *zstd_args[] = { NULL, q_arg, rm_arg, NULL, NULL };
 165
 166 #define ARGS_NUM 4
 167 static const struct compress_types compress_type[COMPRESS_TYPES] = {
 168         { "", "", "", NULL},                                    /* none */
 169         { "Z", COMPRESS_SUFFIX_GZ, _PATH_GZIP, gz_args},        /* gzip */
 170         { "J", COMPRESS_SUFFIX_BZ2, _PATH_BZIP2, bzip2_args},   /* bzip2 */
 171         { "X", COMPRESS_SUFFIX_XZ, _PATH_XZ, xz_args },         /* xz */
 172         { "Y", COMPRESS_SUFFIX_ZST, _PATH_ZSTD, zstd_args }     /* zst */
 173 };
 174
 175 struct conf_entry {
 176         STAILQ_ENTRY(conf_entry) cf_nextp;
 177         char *log;              /* Name of the log */
 178         char *pid_cmd_file;             /* PID or command file */
 179         char *r_reason;         /* The reason this file is being rotated */
 180         int firstcreate;        /* Creating log for the first time (-C). */
 181         int rotate;             /* Non-zero if this file should be rotated */
 182         int fsize;              /* size found for the log file */
 183         uid_t uid;              /* Owner of log */
 184         gid_t gid;              /* Group of log */
 185         int numlogs;            /* Number of logs to keep */
 186         int trsize;             /* Size cutoff to trigger trimming the log */
 187         int hours;              /* Hours between log trimming */
 188         struct ptime_data *trim_at;     /* Specific time to do trimming */
 189         unsigned int permissions;       /* File permissions on the log */
 190         int flags;              /* CE_BINARY */
 191         int compress;           /* Compression */
 192         int sig;                /* Signal to send */
 193         int def_cfg;            /* Using the <default> rule for this file */
 194 };
 195
 196 struct sigwork_entry {
 197         SLIST_ENTRY(sigwork_entry) sw_nextp;
 198         int      sw_signum;             /* the signal to send */
 199         int      sw_pidok;              /* true if pid value is valid */
 200         pid_t    sw_pid;                /* the process id from the PID file */
 201         const char *sw_pidtype;         /* "daemon" or "process group" */
 202         int      sw_runcmd;             /* run command or send PID to signal */
 203         char     sw_fname[1];           /* file the PID was read from or shell cmd */
 204 };
 205
 206 struct zipwork_entry {
 207         SLIST_ENTRY(zipwork_entry) zw_nextp;
 208         const struct conf_entry *zw_conf;       /* for chown/perm/flag info */
 209         const struct sigwork_entry *zw_swork;   /* to know success of signal */
 210         int      zw_fsize;              /* size of the file to compress */
 211         char     zw_fname[1];           /* the file to compress */
 212 };
 213
 214 struct include_entry {
 215         STAILQ_ENTRY(include_entry) inc_nextp;
 216         const char *file;       /* Name of file to process */
 217 };
 218
 219 struct oldlog_entry {
 220         char *fname;            /* Filename of the log file */
 221         time_t t;               /* Parsed timestamp of the logfile */
 222 };
 223
 224 typedef enum {
 225         FREE_ENT, KEEP_ENT
 226 }       fk_entry;
 227
 228 STAILQ_HEAD(cflist, conf_entry);
 229 static SLIST_HEAD(swlisthead, sigwork_entry) swhead =
 230     SLIST_HEAD_INITIALIZER(swhead);
 231 static SLIST_HEAD(zwlisthead, zipwork_entry) zwhead =
 232     SLIST_HEAD_INITIALIZER(zwhead);
 233 STAILQ_HEAD(ilist, include_entry);
 234
 235 int dbg_at_times;               /* -D Show details of 'trim_at' code */
 236
 237 static int archtodir = 0;       /* Archive old logfiles to other directory */
 238 static int createlogs;          /* Create (non-GLOB) logfiles which do not */
 239                                 /*    already exist.  1=='for entries with */
 240                                 /*    C flag', 2=='for all entries'. */
 241 int verbose = 0;                /* Print out what's going on */
 242 static int needroot = 1;        /* Root privs are necessary */
 243 int noaction = 0;               /* Don't do anything, just show it */
 244 static int norotate = 0;        /* Don't rotate */
 245 static int nosignal;            /* Do not send any signals */
 246 static int enforcepid = 0;      /* If PID file does not exist or empty, do nothing */
 247 static int force = 0;           /* Force the trim no matter what */
 248 static int rotatereq = 0;       /* -R = Always rotate the file(s) as given */
 249                                 /*    on the command (this also requires   */
 250                                 /*    that a list of files *are* given on  */
 251                                 /*    the run command). */
 252 static char *requestor;         /* The name given on a -R request */
 253 static char *timefnamefmt = NULL;/* Use time based filenames instead of .0 */
 254 static char *archdirname;       /* Directory path to old logfiles archive */
 255 static char *destdir = NULL;    /* Directory to treat at root for logs */
 256 static const char *conf;        /* Configuration file to use */
 257
 258 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */
 259 static struct ptime_data *timenow; /* The time to use for checking at-fields */
 260
 261 #define DAYTIME_LEN     16
 262 static char daytime[DAYTIME_LEN];/* The current time in human readable form,
 263                                   * used for rotation-tracking messages. */
 264
 265 /* Another buffer to hold the current time in RFC5424 format. Fractional
 266  * seconds are allowed by the RFC, but are not included in the
 267  * rotation-tracking messages written by newsyslog and so are not accounted for
 268  * in the length below.
 269  */
 270 #define DAYTIME_RFC5424_LEN     sizeof("YYYY-MM-DDTHH:MM:SS+00:00")
 271 static char daytime_rfc5424[DAYTIME_RFC5424_LEN];
 272
 273 static char hostname[MAXHOSTNAMELEN]; /* hostname */
 274 static size_t hostname_shortlen;
 275
 276 static const char *path_syslogpid = _PATH_SYSLOGPID;
 277
 278 static struct cflist *get_worklist(char **files);
 279 static void parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
 280                     struct conf_entry *defconf_p, struct ilist *inclist);
 281 static void add_to_queue(const char *fname, struct ilist *inclist);
 282 static char *sob(char *p);
 283 static char *son(char *p);
 284 static int isnumberstr(const char *);
 285 static int isglobstr(const char *);
 286 static char *missing_field(char *p, char *errline);
 287 static void      change_attrs(const char *, const struct conf_entry *);
 288 static const char *get_logfile_suffix(const char *logfile);
 289 static fk_entry  do_entry(struct conf_entry *);
 290 static fk_entry  do_rotate(const struct conf_entry *);
 291 static void      do_sigwork(struct sigwork_entry *);
 292 static void      do_zipwork(struct zipwork_entry *);
 293 static struct sigwork_entry *
 294                  save_sigwork(const struct conf_entry *);
 295 static struct zipwork_entry *
 296                  save_zipwork(const struct conf_entry *, const struct
 297                     sigwork_entry *, int, const char *);
 298 static void      set_swpid(struct sigwork_entry *, const struct conf_entry *);
 299 static int       sizefile(const char *);
 300 static void expand_globs(struct cflist *work_p, struct cflist *glob_p);
 301 static void free_clist(struct cflist *list);
 302 static void free_entry(struct conf_entry *ent);
 303 static struct conf_entry *init_entry(const char *fname,
 304                 struct conf_entry *src_entry);
 305 static void parse_args(int argc, char **argv);
 306 static int parse_doption(const char *doption);
 307 static void usage(void);
 308 static int log_trim(const char *logname, const struct conf_entry *log_ent);
 309 static int age_old_log(const char *file);
 310 static void savelog(char *from, char *to);
 311 static void createdir(const struct conf_entry *ent, char *dirpart);
 312 static void createlog(const struct conf_entry *ent);
 313 static int parse_signal(const char *str);
 314
 315 /*
 316  * All the following take a parameter of 'int', but expect values in the
 317  * range of unsigned char.  Define wrappers which take values of type 'char',
 318  * whether signed or unsigned, and ensure they end up in the right range.
 319  */
 320 #define isdigitch(Anychar) isdigit((u_char)(Anychar))
 321 #define isprintch(Anychar) isprint((u_char)(Anychar))
 322 #define isspacech(Anychar) isspace((u_char)(Anychar))
 323 #define tolowerch(Anychar) tolower((u_char)(Anychar))
 324
 325 int
 326 main(int argc, char **argv)
 327 {
 328         struct cflist *worklist;
 329         struct conf_entry *p;
 330         struct sigwork_entry *stmp;
 331         struct zipwork_entry *ztmp;
 332
 333         SLIST_INIT(&swhead);
 334         SLIST_INIT(&zwhead);
 335
 336         parse_args(argc, argv);
 337         argc -= optind;
 338         argv += optind;
 339
 340         if (needroot && getuid() && geteuid())
 341                 errx(1, "must have root privs");
 342         worklist = get_worklist(argv);
 343
 344         /*
 345          * Rotate all the files which need to be rotated.  Note that
 346          * some users have *hundreds* of entries in newsyslog.conf!
 347          */
 348         while (!STAILQ_EMPTY(worklist)) {
 349                 p = STAILQ_FIRST(worklist);
 350                 STAILQ_REMOVE_HEAD(worklist, cf_nextp);
 351                 if (do_entry(p) == FREE_ENT)
 352                         free_entry(p);
 353         }
 354
 355         /*
 356          * Send signals to any processes which need a signal to tell
 357          * them to close and re-open the log file(s) we have rotated.
 358          * Note that zipwork_entries include pointers to these
 359          * sigwork_entry's, so we can not free the entries here.
 360          */
 361         if (!SLIST_EMPTY(&swhead)) {
 362                 if (noaction || verbose)
 363                         printf("Signal all daemon process(es)...\n");
 364                 SLIST_FOREACH(stmp, &swhead, sw_nextp)
 365                         do_sigwork(stmp);
 366                 if (!(rotatereq && nosignal)) {
 367                         if (noaction)
 368                                 printf("\tsleep 10\n");
 369                         else {
 370                                 if (verbose)
 371                                         printf("Pause 10 seconds to allow "
 372                                             "daemon(s) to close log file(s)\n");
 373                                 sleep(10);
 374                         }
 375                 }
 376         }
 377         /*
 378          * Compress all files that we're expected to compress, now
 379          * that all processes should have closed the files which
 380          * have been rotated.
 381          */
 382         if (!SLIST_EMPTY(&zwhead)) {
 383                 if (noaction || verbose)
 384                         printf("Compress all rotated log file(s)...\n");
 385                 while (!SLIST_EMPTY(&zwhead)) {
 386                         ztmp = SLIST_FIRST(&zwhead);
 387                         do_zipwork(ztmp);
 388                         SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
 389                         free(ztmp);
 390                 }
 391         }
 392         /* Now free all the sigwork entries. */
 393         while (!SLIST_EMPTY(&swhead)) {
 394                 stmp = SLIST_FIRST(&swhead);
 395                 SLIST_REMOVE_HEAD(&swhead, sw_nextp);
 396                 free(stmp);
 397         }
 398
 399         while (wait(NULL) > 0 || errno == EINTR)
 400                 ;
 401         return (0);
 402 }
 403
 404 static struct conf_entry *
 405 init_entry(const char *fname, struct conf_entry *src_entry)
 406 {
 407         struct conf_entry *tempwork;
 408
 409         if (verbose > 4)
 410                 printf("\t--> [creating entry for %s]\n", fname);
 411
 412         tempwork = malloc(sizeof(struct conf_entry));
 413         if (tempwork == NULL)
 414                 err(1, "malloc of conf_entry for %s", fname);
 415
 416         if (destdir == NULL || fname[0] != '/')
 417                 tempwork->log = strdup(fname);
 418         else
 419                 asprintf(&tempwork->log, "%s%s", destdir, fname);
 420         if (tempwork->log == NULL)
 421                 err(1, "strdup for %s", fname);
 422
 423         if (src_entry != NULL) {
 424                 tempwork->pid_cmd_file = NULL;
 425                 if (src_entry->pid_cmd_file)
 426                         tempwork->pid_cmd_file = strdup(src_entry->pid_cmd_file);
 427                 tempwork->r_reason = NULL;
 428                 tempwork->firstcreate = 0;
 429                 tempwork->rotate = 0;
 430                 tempwork->fsize = -1;
 431                 tempwork->uid = src_entry->uid;
 432                 tempwork->gid = src_entry->gid;
 433                 tempwork->numlogs = src_entry->numlogs;
 434                 tempwork->trsize = src_entry->trsize;
 435                 tempwork->hours = src_entry->hours;
 436                 tempwork->trim_at = NULL;
 437                 if (src_entry->trim_at != NULL)
 438                         tempwork->trim_at = ptime_init(src_entry->trim_at);
 439                 tempwork->permissions = src_entry->permissions;
 440                 tempwork->flags = src_entry->flags;
 441                 tempwork->compress = src_entry->compress;
 442                 tempwork->sig = src_entry->sig;
 443                 tempwork->def_cfg = src_entry->def_cfg;
 444         } else {
 445                 /* Initialize as a "do-nothing" entry */
 446                 tempwork->pid_cmd_file = NULL;
 447                 tempwork->r_reason = NULL;
 448                 tempwork->firstcreate = 0;
 449                 tempwork->rotate = 0;
 450                 tempwork->fsize = -1;
 451                 tempwork->uid = (uid_t)-1;
 452                 tempwork->gid = (gid_t)-1;
 453                 tempwork->numlogs = 1;
 454                 tempwork->trsize = -1;
 455                 tempwork->hours = -1;
 456                 tempwork->trim_at = NULL;
 457                 tempwork->permissions = 0;
 458                 tempwork->flags = 0;
 459                 tempwork->compress = COMPRESS_NONE;
 460                 tempwork->sig = SIGHUP;
 461                 tempwork->def_cfg = 0;
 462         }
 463
 464         return (tempwork);
 465 }
 466
 467 static void
 468 free_entry(struct conf_entry *ent)
 469 {
 470
 471         if (ent == NULL)
 472                 return;
 473
 474         if (ent->log != NULL) {
 475                 if (verbose > 4)
 476                         printf("\t--> [freeing entry for %s]\n", ent->log);
 477                 free(ent->log);
 478                 ent->log = NULL;
 479         }
 480
 481         if (ent->pid_cmd_file != NULL) {
 482                 free(ent->pid_cmd_file);
 483                 ent->pid_cmd_file = NULL;
 484         }
 485
 486         if (ent->r_reason != NULL) {
 487                 free(ent->r_reason);
 488                 ent->r_reason = NULL;
 489         }
 490
 491         if (ent->trim_at != NULL) {
 492                 ptime_free(ent->trim_at);
 493                 ent->trim_at = NULL;
 494         }
 495
 496         free(ent);
 497 }
 498
 499 static void
 500 free_clist(struct cflist *list)
 501 {
 502         struct conf_entry *ent;
 503
 504         while (!STAILQ_EMPTY(list)) {
 505                 ent = STAILQ_FIRST(list);
 506                 STAILQ_REMOVE_HEAD(list, cf_nextp);
 507                 free_entry(ent);
 508         }
 509
 510         free(list);
 511         list = NULL;
 512 }
 513
 514 static fk_entry
 515 do_entry(struct conf_entry * ent)
 516 {
 517 #define REASON_MAX      80
 518         int modtime;
 519         fk_entry free_or_keep;
 520         double diffsecs;
 521         char temp_reason[REASON_MAX];
 522         int oversized;
 523
 524         free_or_keep = FREE_ENT;
 525         if (verbose)
 526                 printf("%s <%d%s>: ", ent->log, ent->numlogs,
 527                     compress_type[ent->compress].flag);
 528         ent->fsize = sizefile(ent->log);
 529         oversized = ((ent->trsize > 0) && (ent->fsize >= ent->trsize));
 530         modtime = age_old_log(ent->log);
 531         ent->rotate = 0;
 532         ent->firstcreate = 0;
 533         if (ent->fsize < 0) {
 534                 /*
 535                  * If either the C flag or the -C option was specified,
 536                  * and if we won't be creating the file, then have the
 537                  * verbose message include a hint as to why the file
 538                  * will not be created.
 539                  */
 540                 temp_reason[0] = '\0';
 541                 if (createlogs > 1)
 542                         ent->firstcreate = 1;
 543                 else if ((ent->flags & CE_CREATE) && createlogs)
 544                         ent->firstcreate = 1;
 545                 else if (ent->flags & CE_CREATE)
 546                         strlcpy(temp_reason, " (no -C option)", REASON_MAX);
 547                 else if (createlogs)
 548                         strlcpy(temp_reason, " (no C flag)", REASON_MAX);
 549
 550                 if (ent->firstcreate) {
 551                         if (verbose)
 552                                 printf("does not exist -> will create.\n");
 553                         createlog(ent);
 554                 } else if (verbose) {
 555                         printf("does not exist, skipped%s.\n", temp_reason);
 556                 }
 557         } else {
 558                 if (ent->flags & CE_TRIMAT && !force && !rotatereq &&
 559                     !oversized) {
 560                         diffsecs = ptimeget_diff(timenow, ent->trim_at);
 561                         if (diffsecs < 0.0) {
 562                                 /* trim_at is some time in the future. */
 563                                 if (verbose) {
 564                                         ptime_adjust4dst(ent->trim_at,
 565                                             timenow);
 566                                         printf("--> will trim at %s",
 567                                             ptimeget_ctime(ent->trim_at));
 568                                 }
 569                                 return (free_or_keep);
 570                         } else if (diffsecs >= 3600.0) {
 571                                 /*
 572                                  * trim_at is more than an hour in the past,
 573                                  * so find the next valid trim_at time, and
 574                                  * tell the user what that will be.
 575                                  */
 576                                 if (verbose && dbg_at_times)
 577                                         printf("\n\t--> prev trim at %s\t",
 578                                             ptimeget_ctime(ent->trim_at));
 579                                 if (verbose) {
 580                                         ptimeset_nxtime(ent->trim_at);
 581                                         printf("--> will trim at %s",
 582                                             ptimeget_ctime(ent->trim_at));
 583                                 }
 584                                 return (free_or_keep);
 585                         } else if (verbose && noaction && dbg_at_times) {
 586                                 /*
 587                                  * If we are just debugging at-times, then
 588                                  * a detailed message is helpful.  Also
 589                                  * skip "doing" any commands, since they
 590                                  * would all be turned off by no-action.
 591                                  */
 592                                 printf("\n\t--> timematch at %s",
 593                                     ptimeget_ctime(ent->trim_at));
 594                                 return (free_or_keep);
 595                         } else if (verbose && ent->hours <= 0) {
 596                                 printf("--> time is up\n");
 597                         }
 598                 }
 599                 if (verbose && (ent->trsize > 0))
 600                         printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
 601                 if (verbose && (ent->hours > 0))
 602                         printf(" age (hr): %d [%d] ", modtime, ent->hours);
 603
 604                 /*
 605                  * Figure out if this logfile needs to be rotated.
 606                  */
 607                 temp_reason[0] = '\0';
 608                 if (rotatereq) {
 609                         ent->rotate = 1;
 610                         snprintf(temp_reason, REASON_MAX, " due to -R from %s",
 611                             requestor);
 612                 } else if (force) {
 613                         ent->rotate = 1;
 614                         snprintf(temp_reason, REASON_MAX, " due to -F request");
 615                 } else if (oversized) {
 616                         ent->rotate = 1;
 617                         snprintf(temp_reason, REASON_MAX, " due to size>%dK",
 618                             ent->trsize);
 619                 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
 620                         ent->rotate = 1;
 621                 } else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
 622                     (modtime < 0))) {
 623                         ent->rotate = 1;
 624                 }
 625
 626                 /*
 627                  * If the file needs to be rotated, then rotate it.
 628                  */
 629                 if (ent->rotate && !norotate) {
 630                         if (temp_reason[0] != '\0')
 631                                 ent->r_reason = strdup(temp_reason);
 632                         if (verbose)
 633                                 printf("--> trimming log....\n");
 634                         if (noaction && !verbose)
 635                                 printf("%s <%d%s>: trimming\n", ent->log,
 636                                     ent->numlogs,
 637                                     compress_type[ent->compress].flag);
 638                         free_or_keep = do_rotate(ent);
 639                 } else {
 640                         if (verbose)
 641                                 printf("--> skipping\n");
 642                 }
 643         }
 644         return (free_or_keep);
 645 #undef REASON_MAX
 646 }
 647
 648 static void
 649 parse_args(int argc, char **argv)
 650 {
 651         int ch;
 652         char *p;
 653
 654         timenow = ptime_init(NULL);
 655         ptimeset_time(timenow, time(NULL));
 656         strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN);
 657         ptimeget_ctime_rfc5424(timenow, daytime_rfc5424, DAYTIME_RFC5424_LEN);
 658
 659         /* Let's get our hostname */
 660         (void)gethostname(hostname, sizeof(hostname));
 661         hostname_shortlen = strcspn(hostname, ".");
 662
 663         /* Parse command line options. */
 664         while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1)
 665                 switch (ch) {
 666                 case 'a':
 667                         archtodir++;
 668                         archdirname = optarg;
 669                         break;
 670                 case 'd':
 671                         destdir = optarg;
 672                         break;
 673                 case 'f':
 674                         conf = optarg;
 675                         break;
 676                 case 'n':
 677                         noaction++;
 678                         /* FALLTHROUGH */
 679                 case 'r':
 680                         needroot = 0;
 681                         break;
 682                 case 's':
 683                         nosignal = 1;
 684                         break;
 685                 case 't':
 686                         if (optarg[0] == '\0' ||
 687                             strcmp(optarg, "DEFAULT") == 0)
 688                                 timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT);
 689                         else
 690                                 timefnamefmt = strdup(optarg);
 691                         break;
 692                 case 'v':
 693                         verbose++;
 694                         break;
 695                 case 'C':
 696                         /* Useful for things like rc.diskless... */
 697                         createlogs++;
 698                         break;
 699                 case 'D':
 700                         /*
 701                          * Set some debugging option.  The specific option
 702                          * depends on the value of optarg.  These options
 703                          * may come and go without notice or documentation.
 704                          */
 705                         if (parse_doption(optarg))
 706                                 break;
 707                         usage();
 708                         /* NOTREACHED */
 709                 case 'F':
 710                         force++;
 711                         break;
 712                 case 'N':
 713                         norotate++;
 714                         break;
 715                 case 'P':
 716                         enforcepid++;
 717                         break;
 718                 case 'R':
 719                         rotatereq++;
 720                         requestor = strdup(optarg);
 721                         break;
 722                 case 'S':
 723                         path_syslogpid = optarg;
 724                         break;
 725                 case 'm':       /* Used by OpenBSD for "monitor mode" */
 726                 default:
 727                         usage();
 728                         /* NOTREACHED */
 729                 }
 730
 731         if (force && norotate) {
 732                 warnx("Only one of -F and -N may be specified.");
 733                 usage();
 734                 /* NOTREACHED */
 735         }
 736
 737         if (rotatereq) {
 738                 if (optind == argc) {
 739                         warnx("At least one filename must be given when -R is specified.");
 740                         usage();
 741                         /* NOTREACHED */
 742                 }
 743                 /* Make sure "requestor" value is safe for a syslog message. */
 744                 for (p = requestor; *p != '\0'; p++) {
 745                         if (!isprintch(*p) && (*p != '\t'))
 746                                 *p = '.';
 747                 }
 748         }
 749
 750         if (dbg_timenow) {
 751                 /*
 752                  * Note that the 'daytime' variable is not changed.
 753                  * That is only used in messages that track when a
 754                  * logfile is rotated, and if a file *is* rotated,
 755                  * then it will still rotated at the "real now" time.
 756                  */
 757                 ptime_free(timenow);
 758                 timenow = dbg_timenow;
 759                 fprintf(stderr, "Debug: Running as if TimeNow is %s",
 760                     ptimeget_ctime(dbg_timenow));
 761         }
 762
 763 }
 764
 765 /*
 766  * These debugging options are mainly meant for developer use, such
 767  * as writing regression-tests.  They would not be needed by users
 768  * during normal operation of newsyslog...
 769  */
 770 static int
 771 parse_doption(const char *doption)
 772 {
 773         const char TN[] = "TN=";
 774         int res;
 775
 776         if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
 777                 /*
 778                  * The "TimeNow" debugging option.  This might be off
 779                  * by an hour when crossing a timezone change.
 780                  */
 781                 dbg_timenow = ptime_init(NULL);
 782                 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
 783                     time(NULL), doption + sizeof(TN) - 1);
 784                 if (res == -2) {
 785                         warnx("Non-existent time specified on -D %s", doption);
 786                         return (0);                     /* failure */
 787                 } else if (res < 0) {
 788                         warnx("Malformed time given on -D %s", doption);
 789                         return (0);                     /* failure */
 790                 }
 791                 return (1);                     /* successfully parsed */
 792
 793         }
 794
 795         if (strcmp(doption, "ats") == 0) {
 796                 dbg_at_times++;
 797                 return (1);                     /* successfully parsed */
 798         }
 799
 800         /* XXX - This check could probably be dropped. */
 801         if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder")
 802             == 0)) {
 803                 warnx("NOTE: newsyslog always uses 'neworder'.");
 804                 return (1);                     /* successfully parsed */
 805         }
 806
 807         warnx("Unknown -D (debug) option: '%s'", doption);
 808         return (0);                             /* failure */
 809 }
 810
 811 static void
 812 usage(void)
 813 {
 814
 815         fprintf(stderr,
 816             "usage: newsyslog [-CFNPnrsv] [-a directory] [-d directory] [-f config_file]\n"
 817             "                 [-S pidfile] [-t timefmt] [[-R tagname] file ...]\n");
 818         exit(1);
 819 }
 820
 821 /*
 822  * Parse a configuration file and return a linked list of all the logs
 823  * which should be processed.
 824  */
 825 static struct cflist *
 826 get_worklist(char **files)
 827 {
 828         FILE *f;
 829         char **given;
 830         struct cflist *cmdlist, *filelist, *globlist;
 831         struct conf_entry *defconf, *dupent, *ent;
 832         struct ilist inclist;
 833         struct include_entry *inc;
 834         int gmatch, fnres;
 835
 836         defconf = NULL;
 837         STAILQ_INIT(&inclist);
 838
 839         filelist = malloc(sizeof(struct cflist));
 840         if (filelist == NULL)
 841                 err(1, "malloc of filelist");
 842         STAILQ_INIT(filelist);
 843         globlist = malloc(sizeof(struct cflist));
 844         if (globlist == NULL)
 845                 err(1, "malloc of globlist");
 846         STAILQ_INIT(globlist);
 847
 848         inc = malloc(sizeof(struct include_entry));
 849         if (inc == NULL)
 850                 err(1, "malloc of inc");
 851         inc->file = conf;
 852         if (inc->file == NULL)
 853                 inc->file = _PATH_CONF;
 854         STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp);
 855
 856         STAILQ_FOREACH(inc, &inclist, inc_nextp) {
 857                 if (strcmp(inc->file, "-") != 0)
 858                         f = fopen(inc->file, "r");
 859                 else {
 860                         f = stdin;
 861                         inc->file = "<stdin>";
 862                 }
 863                 if (!f)
 864                         err(1, "%s", inc->file);
 865
 866                 if (verbose)
 867                         printf("Processing %s\n", inc->file);
 868                 parse_file(f, filelist, globlist, defconf, &inclist);
 869                 (void) fclose(f);
 870         }
 871
 872         /*
 873          * All config-file information has been read in and turned into
 874          * a filelist and a globlist.  If there were no specific files
 875          * given on the run command, then the only thing left to do is to
 876          * call a routine which finds all files matched by the globlist
 877          * and adds them to the filelist.  Then return the worklist.
 878          */
 879         if (*files == NULL) {
 880                 expand_globs(filelist, globlist);
 881                 free_clist(globlist);
 882                 if (defconf != NULL)
 883                         free_entry(defconf);
 884                 return (filelist);
 885                 /* NOTREACHED */
 886         }
 887
 888         /*
 889          * If newsyslog was given a specific list of files to process,
 890          * it may be that some of those files were not listed in any
 891          * config file.  Those unlisted files should get the default
 892          * rotation action.  First, create the default-rotation action
 893          * if none was found in a system config file.
 894          */
 895         if (defconf == NULL) {
 896                 defconf = init_entry(DEFAULT_MARKER, NULL);
 897                 defconf->numlogs = 3;
 898                 defconf->trsize = 50;
 899                 defconf->permissions = S_IRUSR|S_IWUSR;
 900         }
 901
 902         /*
 903          * If newsyslog was run with a list of specific filenames,
 904          * then create a new worklist which has only those files in
 905          * it, picking up the rotation-rules for those files from
 906          * the original filelist.
 907          *
 908          * XXX - Note that this will copy multiple rules for a single
 909          *      logfile, if multiple entries are an exact match for
 910          *      that file.  That matches the historic behavior, but do
 911          *      we want to continue to allow it?  If so, it should
 912          *      probably be handled more intelligently.
 913          */
 914         cmdlist = malloc(sizeof(struct cflist));
 915         if (cmdlist == NULL)
 916                 err(1, "malloc of cmdlist");
 917         STAILQ_INIT(cmdlist);
 918
 919         for (given = files; *given; ++given) {
 920                 /*
 921                  * First try to find exact-matches for this given file.
 922                  */
 923                 gmatch = 0;
 924                 STAILQ_FOREACH(ent, filelist, cf_nextp) {
 925                         if (strcmp(ent->log, *given) == 0) {
 926                                 gmatch++;
 927                                 dupent = init_entry(*given, ent);
 928                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 929                         }
 930                 }
 931                 if (gmatch) {
 932                         if (verbose > 2)
 933                                 printf("\t+ Matched entry %s\n", *given);
 934                         continue;
 935                 }
 936
 937                 /*
 938                  * There was no exact-match for this given file, so look
 939                  * for a "glob" entry which does match.
 940                  */
 941                 gmatch = 0;
 942                 if (verbose > 2 && globlist != NULL)
 943                         printf("\t+ Checking globs for %s\n", *given);
 944                 STAILQ_FOREACH(ent, globlist, cf_nextp) {
 945                         fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
 946                         if (verbose > 2)
 947                                 printf("\t+    = %d for pattern %s\n", fnres,
 948                                     ent->log);
 949                         if (fnres == 0) {
 950                                 gmatch++;
 951                                 dupent = init_entry(*given, ent);
 952                                 /* This new entry is not a glob! */
 953                                 dupent->flags &= ~CE_GLOB;
 954                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 955                                 /* Only allow a match to one glob-entry */
 956                                 break;
 957                         }
 958                 }
 959                 if (gmatch) {
 960                         if (verbose > 2)
 961                                 printf("\t+ Matched %s via %s\n", *given,
 962                                     ent->log);
 963                         continue;
 964                 }
 965
 966                 /*
 967                  * This given file was not found in any config file, so
 968                  * add a worklist item based on the default entry.
 969                  */
 970                 if (verbose > 2)
 971                         printf("\t+ No entry matched %s  (will use %s)\n",
 972                             *given, DEFAULT_MARKER);
 973                 dupent = init_entry(*given, defconf);
 974                 /* Mark that it was *not* found in a config file */
 975                 dupent->def_cfg = 1;
 976                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 977         }
 978
 979         /*
 980          * Free all the entries in the original work list, the list of
 981          * glob entries, and the default entry.
 982          */
 983         free_clist(filelist);
 984         free_clist(globlist);
 985         free_entry(defconf);
 986
 987         /* And finally, return a worklist which matches the given files. */
 988         return (cmdlist);
 989 }
 990
 991 /*
 992  * Expand the list of entries with filename patterns, and add all files
 993  * which match those glob-entries onto the worklist.
 994  */
 995 static void
 996 expand_globs(struct cflist *work_p, struct cflist *glob_p)
 997 {
 998         int gmatch, gres;
 999         size_t i;
1000         char *mfname;
1001         struct conf_entry *dupent, *ent, *globent;
1002         glob_t pglob;
1003         struct stat st_fm;
1004
1005         /*
1006          * The worklist contains all fully-specified (non-GLOB) names.
1007          *
1008          * Now expand the list of filename-pattern (GLOB) entries into
1009          * a second list, which (by definition) will only match files
1010          * that already exist.  Do not add a glob-related entry for any
1011          * file which already exists in the fully-specified list.
1012          */
1013         STAILQ_FOREACH(globent, glob_p, cf_nextp) {
1014                 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
1015                 if (gres != 0) {
1016                         warn("cannot expand pattern (%d): %s", gres,
1017                             globent->log);
1018                         continue;
1019                 }
1020
1021                 if (verbose > 2)
1022                         printf("\t+ Expanding pattern %s\n", globent->log);
1023                 for (i = 0; i < pglob.gl_matchc; i++) {
1024                         mfname = pglob.gl_pathv[i];
1025
1026                         /* See if this file already has a specific entry. */
1027                         gmatch = 0;
1028                         STAILQ_FOREACH(ent, work_p, cf_nextp) {
1029                                 if (strcmp(mfname, ent->log) == 0) {
1030                                         gmatch++;
1031                                         break;
1032                                 }
1033                         }
1034                         if (gmatch)
1035                                 continue;
1036
1037                         /* Make sure the named matched is a file. */
1038                         gres = lstat(mfname, &st_fm);
1039                         if (gres != 0) {
1040                                 /* Error on a file that glob() matched?!? */
1041                                 warn("Skipping %s - lstat() error", mfname);
1042                                 continue;
1043                         }
1044                         if (!S_ISREG(st_fm.st_mode)) {
1045                                 /* We only rotate files! */
1046                                 if (verbose > 2)
1047                                         printf("\t+  . skipping %s (!file)\n",
1048                                             mfname);
1049                                 continue;
1050                         }
1051
1052                         if (verbose > 2)
1053                                 printf("\t+  . add file %s\n", mfname);
1054                         dupent = init_entry(mfname, globent);
1055                         /* This new entry is not a glob! */
1056                         dupent->flags &= ~CE_GLOB;
1057
1058                         /* Add to the worklist. */
1059                         STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp);
1060                 }
1061                 globfree(&pglob);
1062                 if (verbose > 2)
1063                         printf("\t+ Done with pattern %s\n", globent->log);
1064         }
1065 }
1066
1067 /*
1068  * Parse a configuration file and update a linked list of all the logs to
1069  * process.
1070  */
1071 static void
1072 parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
1073     struct conf_entry *defconf_p, struct ilist *inclist)
1074 {
1075         char line[BUFSIZ], *parse, *q;
1076         char *cp, *errline, *group;
1077         struct conf_entry *working;
1078         struct passwd *pwd;
1079         struct group *grp;
1080         glob_t pglob;
1081         int eol, ptm_opts, res, special;
1082         size_t i;
1083
1084         errline = NULL;
1085         while (fgets(line, BUFSIZ, cf)) {
1086                 if ((line[0] == '\n') || (line[0] == '#') ||
1087                     (strlen(line) == 0))
1088                         continue;
1089                 if (errline != NULL)
1090                         free(errline);
1091                 errline = strdup(line);
1092                 for (cp = line + 1; *cp != '\0'; cp++) {
1093                         if (*cp != '#')
1094                                 continue;
1095                         if (*(cp - 1) == '\\') {
1096                                 strcpy(cp - 1, cp);
1097                                 cp--;
1098                                 continue;
1099                         }
1100                         *cp = '\0';
1101                         break;
1102                 }
1103
1104                 q = parse = missing_field(sob(line), errline);
1105                 parse = son(line);
1106                 if (!*parse)
1107                         errx(1, "malformed line (missing fields):\n%s",
1108                             errline);
1109                 *parse = '\0';
1110
1111                 /*
1112                  * Allow people to set debug options via the config file.
1113                  * (NOTE: debug options are undocumented, and may disappear
1114                  * at any time, etc).
1115                  */
1116                 if (strcasecmp(DEBUG_MARKER, q) == 0) {
1117                         q = parse = missing_field(sob(parse + 1), errline);
1118                         parse = son(parse);
1119                         if (!*parse)
1120                                 warnx("debug line specifies no option:\n%s",
1121                                     errline);
1122                         else {
1123                                 *parse = '\0';
1124                                 parse_doption(q);
1125                         }
1126                         continue;
1127                 } else if (strcasecmp(INCLUDE_MARKER, q) == 0) {
1128                         if (verbose)
1129                                 printf("Found: %s", errline);
1130                         q = parse = missing_field(sob(parse + 1), errline);
1131                         parse = son(parse);
1132                         if (!*parse) {
1133                                 warnx("include line missing argument:\n%s",
1134                                     errline);
1135                                 continue;
1136                         }
1137
1138                         *parse = '\0';
1139
1140                         if (isglobstr(q)) {
1141                                 res = glob(q, GLOB_NOCHECK, NULL, &pglob);
1142                                 if (res != 0) {
1143                                         warn("cannot expand pattern (%d): %s",
1144                                             res, q);
1145                                         continue;
1146                                 }
1147
1148                                 if (verbose > 2)
1149                                         printf("\t+ Expanding pattern %s\n", q);
1150
1151                                 for (i = 0; i < pglob.gl_matchc; i++)
1152                                         add_to_queue(pglob.gl_pathv[i],
1153                                             inclist);
1154                                 globfree(&pglob);
1155                         } else
1156                                 add_to_queue(q, inclist);
1157                         continue;
1158                 }
1159
1160                 special = 0;
1161                 working = init_entry(q, NULL);
1162                 if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1163                         special = 1;
1164                         if (defconf_p != NULL) {
1165                                 warnx("Ignoring duplicate entry for %s!", q);
1166                                 free_entry(working);
1167                                 continue;
1168                         }
1169                         defconf_p = working;
1170                 }
1171
1172                 q = parse = missing_field(sob(parse + 1), errline);
1173                 parse = son(parse);
1174                 if (!*parse)
1175                         errx(1, "malformed line (missing fields):\n%s",
1176                             errline);
1177                 *parse = '\0';
1178                 if ((group = strchr(q, ':')) != NULL ||
1179                     (group = strrchr(q, '.')) != NULL) {
1180                         *group++ = '\0';
1181                         if (*q) {
1182                                 if (!(isnumberstr(q))) {
1183                                         if ((pwd = getpwnam(q)) == NULL)
1184                                                 errx(1,
1185                                      "error in config file; unknown user:\n%s",
1186                                                     errline);
1187                                         working->uid = pwd->pw_uid;
1188                                 } else
1189                                         working->uid = atoi(q);
1190                         } else
1191                                 working->uid = (uid_t)-1;
1192
1193                         q = group;
1194                         if (*q) {
1195                                 if (!(isnumberstr(q))) {
1196                                         if ((grp = getgrnam(q)) == NULL)
1197                                                 errx(1,
1198                                     "error in config file; unknown group:\n%s",
1199                                                     errline);
1200                                         working->gid = grp->gr_gid;
1201                                 } else
1202                                         working->gid = atoi(q);
1203                         } else
1204                                 working->gid = (gid_t)-1;
1205
1206                         q = parse = missing_field(sob(parse + 1), errline);
1207                         parse = son(parse);
1208                         if (!*parse)
1209                                 errx(1, "malformed line (missing fields):\n%s",
1210                                     errline);
1211                         *parse = '\0';
1212                 } else {
1213                         working->uid = (uid_t)-1;
1214                         working->gid = (gid_t)-1;
1215                 }
1216
1217                 if (!sscanf(q, "%o", &working->permissions))
1218                         errx(1, "error in config file; bad permissions:\n%s",
1219                             errline);
1220
1221                 q = parse = missing_field(sob(parse + 1), errline);
1222                 parse = son(parse);
1223                 if (!*parse)
1224                         errx(1, "malformed line (missing fields):\n%s",
1225                             errline);
1226                 *parse = '\0';
1227                 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1228                         errx(1, "error in config file; bad value for count of logs to save:\n%s",
1229                             errline);
1230
1231                 q = parse = missing_field(sob(parse + 1), errline);
1232                 parse = son(parse);
1233                 if (!*parse)
1234                         errx(1, "malformed line (missing fields):\n%s",
1235                             errline);
1236                 *parse = '\0';
1237                 if (isdigitch(*q))
1238                         working->trsize = atoi(q);
1239                 else if (strcmp(q, "*") == 0)
1240                         working->trsize = -1;
1241                 else {
1242                         warnx("Invalid value of '%s' for 'size' in line:\n%s",
1243                             q, errline);
1244                         working->trsize = -1;
1245                 }
1246
1247                 working->flags = 0;
1248                 working->compress = COMPRESS_NONE;
1249                 q = parse = missing_field(sob(parse + 1), errline);
1250                 parse = son(parse);
1251                 eol = !*parse;
1252                 *parse = '\0';
1253                 {
1254                         char *ep;
1255                         u_long ul;
1256
1257                         ul = strtoul(q, &ep, 10);
1258                         if (ep == q)
1259                                 working->hours = 0;
1260                         else if (*ep == '*')
1261                                 working->hours = -1;
1262                         else if (ul > INT_MAX)
1263                                 errx(1, "interval is too large:\n%s", errline);
1264                         else
1265                                 working->hours = ul;
1266
1267                         if (*ep == '\0' || strcmp(ep, "*") == 0)
1268                                 goto no_trimat;
1269                         if (*ep != '@' && *ep != '$')
1270                                 errx(1, "malformed interval/at:\n%s", errline);
1271
1272                         working->flags |= CE_TRIMAT;
1273                         working->trim_at = ptime_init(NULL);
1274                         ptm_opts = PTM_PARSE_ISO8601;
1275                         if (*ep == '$')
1276                                 ptm_opts = PTM_PARSE_DWM;
1277                         ptm_opts |= PTM_PARSE_MATCHDOM;
1278                         res = ptime_relparse(working->trim_at, ptm_opts,
1279                             ptimeget_secs(timenow), ep + 1);
1280                         if (res == -2)
1281                                 errx(1, "nonexistent time for 'at' value:\n%s",
1282                                     errline);
1283                         else if (res < 0)
1284                                 errx(1, "malformed 'at' value:\n%s", errline);
1285                 }
1286 no_trimat:
1287
1288                 if (eol)
1289                         q = NULL;
1290                 else {
1291                         q = parse = sob(parse + 1);     /* Optional field */
1292                         parse = son(parse);
1293                         if (!*parse)
1294                                 eol = 1;
1295                         *parse = '\0';
1296                 }
1297
1298                 for (; q && *q && !isspacech(*q); q++) {
1299                         switch (tolowerch(*q)) {
1300                         case 'b':
1301                                 working->flags |= CE_BINARY;
1302                                 break;
1303                         case 'c':
1304                                 working->flags |= CE_CREATE;
1305                                 break;
1306                         case 'd':
1307                                 working->flags |= CE_NODUMP;
1308                                 break;
1309                         case 'g':
1310                                 working->flags |= CE_GLOB;
1311                                 break;
1312                         case 'j':
1313                                 working->compress = COMPRESS_BZIP2;
1314                                 break;
1315                         case 'n':
1316                                 working->flags |= CE_NOSIGNAL;
1317                                 break;
1318                         case 'p':
1319                                 working->flags |= CE_PLAIN0;
1320                                 break;
1321                         case 'r':
1322                                 working->flags |= CE_PID2CMD;
1323                                 break;
1324                         case 't':
1325                                 working->flags |= CE_RFC5424;
1326                                 break;
1327                         case 'u':
1328                                 working->flags |= CE_SIGNALGROUP;
1329                                 break;
1330                         case 'w':
1331                                 /* Deprecated flag - keep for compatibility purposes */
1332                                 break;
1333                         case 'x':
1334                                 working->compress = COMPRESS_XZ;
1335                                 break;
1336                         case 'y':
1337                                 working->compress = COMPRESS_ZSTD;
1338                                 break;
1339                         case 'z':
1340                                 working->compress = COMPRESS_GZIP;
1341                                 break;
1342                         case '-':
1343                                 break;
1344                         case 'f':       /* Used by OpenBSD for "CE_FOLLOW" */
1345                         case 'm':       /* Used by OpenBSD for "CE_MONITOR" */
1346                         default:
1347                                 errx(1, "illegal flag in config file -- %c",
1348                                     *q);
1349                         }
1350                 }
1351
1352                 if (eol)
1353                         q = NULL;
1354                 else {
1355                         q = parse = sob(parse + 1);     /* Optional field */
1356                         parse = son(parse);
1357                         if (!*parse)
1358                                 eol = 1;
1359                         *parse = '\0';
1360                 }
1361
1362                 working->pid_cmd_file = NULL;
1363                 if (q && *q) {
1364                         if (*q == '/')
1365                                 working->pid_cmd_file = strdup(q);
1366                         else if (isalnum(*q))
1367                                 goto got_sig;
1368                         else {
1369                                 errx(1,
1370                         "illegal pid file or signal in config file:\n%s",
1371                                     errline);
1372                         }
1373                 }
1374                 if (eol)
1375                         q = NULL;
1376                 else {
1377                         q = parse = sob(parse + 1);     /* Optional field */
1378                         *(parse = son(parse)) = '\0';
1379                 }
1380
1381                 working->sig = SIGHUP;
1382                 if (q && *q) {
1383 got_sig:
1384                         working->sig = parse_signal(q);
1385                         if (working->sig < 1 || working->sig >= sys_nsig) {
1386                                 errx(1,
1387                                     "illegal signal in config file:\n%s",
1388                                     errline);
1389                         }
1390                 }
1391
1392                 /*
1393                  * Finish figuring out what pid-file to use (if any) in
1394                  * later processing if this logfile needs to be rotated.
1395                  */
1396                 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1397                         /*
1398                          * This config-entry specified 'n' for nosignal,
1399                          * see if it also specified an explicit pid_cmd_file.
1400                          * This would be a pretty pointless combination.
1401                          */
1402                         if (working->pid_cmd_file != NULL) {
1403                                 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1404                                     working->pid_cmd_file, errline);
1405                                 free(working->pid_cmd_file);
1406                                 working->pid_cmd_file = NULL;
1407                         }
1408                 } else if (working->pid_cmd_file == NULL) {
1409                         /*
1410                          * This entry did not specify the 'n' flag, which
1411                          * means it should signal syslogd unless it had
1412                          * specified some other pid-file (and obviously the
1413                          * syslog pid-file will not be for a process-group).
1414                          * Also, we should only try to notify syslog if we
1415                          * are root.
1416                          */
1417                         if (working->flags & CE_SIGNALGROUP) {
1418                                 warnx("Ignoring flag 'U' in line:\n%s",
1419                                     errline);
1420                                 working->flags &= ~CE_SIGNALGROUP;
1421                         }
1422                         if (needroot)
1423                                 working->pid_cmd_file = strdup(path_syslogpid);
1424                 }
1425
1426                 /*
1427                  * Add this entry to the appropriate list of entries, unless
1428                  * it was some kind of special entry (eg: <default>).
1429                  */
1430                 if (special) {
1431                         ;                       /* Do not add to any list */
1432                 } else if (working->flags & CE_GLOB) {
1433                         STAILQ_INSERT_TAIL(glob_p, working, cf_nextp);
1434                 } else {
1435                         STAILQ_INSERT_TAIL(work_p, working, cf_nextp);
1436                 }
1437         }
1438         if (errline != NULL)
1439                 free(errline);
1440 }
1441
1442 static char *
1443 missing_field(char *p, char *errline)
1444 {
1445
1446         if (!p || !*p)
1447                 errx(1, "missing field in config file:\n%s", errline);
1448         return (p);
1449 }
1450
1451 /*
1452  * In our sort we return it in the reverse of what qsort normally
1453  * would do, as we want the newest files first.  If we have two
1454  * entries with the same time we don't really care about order.
1455  *
1456  * Support function for qsort() in delete_oldest_timelog().
1457  */
1458 static int
1459 oldlog_entry_compare(const void *a, const void *b)
1460 {
1461         const struct oldlog_entry *ola = a, *olb = b;
1462
1463         if (ola->t > olb->t)
1464                 return (-1);
1465         else if (ola->t < olb->t)
1466                 return (1);
1467         else
1468                 return (0);
1469 }
1470
1471 /*
1472  * Check whether the file corresponding to dp is an archive of the logfile
1473  * logfname, based on the timefnamefmt format string. Return true and fill out
1474  * tm if this is the case; otherwise return false.
1475  */
1476 static int
1477 validate_old_timelog(int fd, const struct dirent *dp, const char *logfname,
1478     struct tm *tm)
1479 {
1480         struct stat sb;
1481         size_t logfname_len;
1482         char *s;
1483         int c;
1484
1485         logfname_len = strlen(logfname);
1486
1487         if (dp->d_type != DT_REG) {
1488                 /*
1489                  * Some filesystems (e.g. NFS) don't fill out the d_type field
1490                  * and leave it set to DT_UNKNOWN; in this case we must obtain
1491                  * the file type ourselves.
1492                  */
1493                 if (dp->d_type != DT_UNKNOWN ||
1494                     fstatat(fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) != 0 ||
1495                     !S_ISREG(sb.st_mode))
1496                         return (0);
1497         }
1498         /* Ignore everything but files with our logfile prefix. */
1499         if (strncmp(dp->d_name, logfname, logfname_len) != 0)
1500                 return (0);
1501         /* Ignore the actual non-rotated logfile. */
1502         if (dp->d_namlen == logfname_len)
1503                 return (0);
1504
1505         /*
1506          * Make sure we created have found a logfile, so the
1507          * postfix is valid, IE format is: '.<time>(.[bgx]z)?'.
1508          */
1509         if (dp->d_name[logfname_len] != '.') {
1510                 if (verbose)
1511                         printf("Ignoring %s which has unexpected "
1512                             "extension '%s'\n", dp->d_name,
1513                             &dp->d_name[logfname_len]);
1514                 return (0);
1515         }
1516         memset(tm, 0, sizeof(*tm));
1517         if ((s = strptime(&dp->d_name[logfname_len + 1],
1518             timefnamefmt, tm)) == NULL) {
1519                 /*
1520                  * We could special case "old" sequentially named logfiles here,
1521                  * but we do not as that would require special handling to
1522                  * decide which one was the oldest compared to "new" time based
1523                  * logfiles.
1524                  */
1525                 if (verbose)
1526                         printf("Ignoring %s which does not "
1527                             "match time format\n", dp->d_name);
1528                 return (0);
1529         }
1530
1531         for (c = 0; c < COMPRESS_TYPES; c++)
1532                 if (strcmp(s, compress_type[c].suffix) == 0)
1533                         /* We're done. */
1534                         return (1);
1535
1536         if (verbose)
1537                 printf("Ignoring %s which has unexpected extension '%s'\n",
1538                     dp->d_name, s);
1539
1540         return (0);
1541 }
1542
1543 /*
1544  * Delete the oldest logfiles, when using time based filenames.
1545  */
1546 static void
1547 delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
1548 {
1549         char *basebuf, *dirbuf, errbuf[80];
1550         const char *base, *dir;
1551         int dir_fd, i, logcnt, max_logcnt;
1552         struct oldlog_entry *oldlogs;
1553         struct dirent *dp;
1554         struct tm tm;
1555         DIR *dirp;
1556
1557         oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry));
1558         max_logcnt = MAX_OLDLOGS;
1559         logcnt = 0;
1560
1561         if (archive_dir != NULL && archive_dir[0] != '\0') {
1562                 dirbuf = NULL;
1563                 dir = archive_dir;
1564         } else {
1565                 if ((dirbuf = strdup(ent->log)) == NULL)
1566                         err(1, "strdup()");
1567                 dir = dirname(dirbuf);
1568         }
1569
1570         if ((basebuf = strdup(ent->log)) == NULL)
1571                 err(1, "strdup()");
1572         base = basename(basebuf);
1573         if (strcmp(base, "/") == 0)
1574                 errx(1, "Invalid log filename - became '/'");
1575
1576         if (verbose > 2)
1577                 printf("Searching for old logs in %s\n", dir);
1578
1579         /* First we create a 'list' of all archived logfiles */
1580         if ((dirp = opendir(dir)) == NULL)
1581                 err(1, "Cannot open log directory '%s'", dir);
1582         dir_fd = dirfd(dirp);
1583         while ((dp = readdir(dirp)) != NULL) {
1584                 if (validate_old_timelog(dir_fd, dp, base, &tm) == 0)
1585                         continue;
1586
1587                 /*
1588                  * We should now have old an old rotated logfile, so
1589                  * add it to the 'list'.
1590                  */
1591                 if ((oldlogs[logcnt].t = timegm(&tm)) == -1)
1592                         err(1, "Could not convert time string to time value");
1593                 if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL)
1594                         err(1, "strdup()");
1595                 logcnt++;
1596
1597                 /*
1598                  * It is very unlikely we ever run out of space in the
1599                  * logfile array from the default size, but lets
1600                  * handle it anyway...
1601                  */
1602                 if (logcnt >= max_logcnt) {
1603                         max_logcnt *= 4;
1604                         /* Detect integer overflow */
1605                         if (max_logcnt < logcnt)
1606                                 errx(1, "Too many old logfiles found");
1607                         oldlogs = realloc(oldlogs,
1608                             max_logcnt * sizeof(struct oldlog_entry));
1609                         if (oldlogs == NULL)
1610                                 err(1, "realloc()");
1611                 }
1612         }
1613
1614         /* Second, if needed we delete oldest archived logfiles */
1615         if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) {
1616                 oldlogs = realloc(oldlogs, logcnt *
1617                     sizeof(struct oldlog_entry));
1618                 if (oldlogs == NULL)
1619                         err(1, "realloc()");
1620
1621                 /*
1622                  * We now sort the logs in the order of newest to
1623                  * oldest.  That way we can simply skip over the
1624                  * number of records we want to keep.
1625                  */
1626                 qsort(oldlogs, logcnt, sizeof(struct oldlog_entry),
1627                     oldlog_entry_compare);
1628                 for (i = ent->numlogs - 1; i < logcnt; i++) {
1629                         if (noaction)
1630                                 printf("\trm -f %s/%s\n", dir,
1631                                     oldlogs[i].fname);
1632                         else if (unlinkat(dir_fd, oldlogs[i].fname, 0) != 0) {
1633                                 snprintf(errbuf, sizeof(errbuf),
1634                                     "Could not delete old logfile '%s'",
1635                                     oldlogs[i].fname);
1636                                 perror(errbuf);
1637                         }
1638                 }
1639         } else if (verbose > 1)
1640                 printf("No old logs to delete for logfile %s\n", ent->log);
1641
1642         /* Third, cleanup */
1643         closedir(dirp);
1644         for (i = 0; i < logcnt; i++) {
1645                 assert(oldlogs[i].fname != NULL);
1646                 free(oldlogs[i].fname);
1647         }
1648         free(oldlogs);
1649         free(dirbuf);
1650         free(basebuf);
1651 }
1652
1653 /*
1654  * Generate a log filename, when using classic filenames.
1655  */
1656 static void
1657 gen_classiclog_fname(char *fname, size_t fname_sz, const char *archive_dir,
1658     const char *namepart, int numlogs_c)
1659 {
1660
1661         if (archive_dir[0] != '\0')
1662                 (void) snprintf(fname, fname_sz, "%s/%s.%d", archive_dir,
1663                     namepart, numlogs_c);
1664         else
1665                 (void) snprintf(fname, fname_sz, "%s.%d", namepart, numlogs_c);
1666 }
1667
1668 /*
1669  * Delete a rotated logfile, when using classic filenames.
1670  */
1671 static void
1672 delete_classiclog(const char *archive_dir, const char *namepart, int numlog_c)
1673 {
1674         char file1[MAXPATHLEN], zfile1[MAXPATHLEN];
1675         int c;
1676
1677         gen_classiclog_fname(file1, sizeof(file1), archive_dir, namepart,
1678             numlog_c);
1679
1680         for (c = 0; c < COMPRESS_TYPES; c++) {
1681                 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1682                     compress_type[c].suffix);
1683                 if (noaction)
1684                         printf("\trm -f %s\n", zfile1);
1685                 else
1686                         (void) unlink(zfile1);
1687         }
1688 }
1689
1690 /*
1691  * Only add to the queue if the file hasn't already been added. This is
1692  * done to prevent circular include loops.
1693  */
1694 static void
1695 add_to_queue(const char *fname, struct ilist *inclist)
1696 {
1697         struct include_entry *inc;
1698
1699         STAILQ_FOREACH(inc, inclist, inc_nextp) {
1700                 if (strcmp(fname, inc->file) == 0) {
1701                         warnx("duplicate include detected: %s", fname);
1702                         return;
1703                 }
1704         }
1705
1706         inc = malloc(sizeof(struct include_entry));
1707         if (inc == NULL)
1708                 err(1, "malloc of inc");
1709         inc->file = strdup(fname);
1710
1711         if (verbose > 2)
1712                 printf("\t+ Adding %s to the processing queue.\n", fname);
1713
1714         STAILQ_INSERT_TAIL(inclist, inc, inc_nextp);
1715 }
1716
1717 /*
1718  * Search for logfile and return its compression suffix (if supported)
1719  * The suffix detection is first-match in the order of compress_types
1720  *
1721  * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE)
1722  * a zero-length string is returned
1723  */
1724 static const char *
1725 get_logfile_suffix(const char *logfile)
1726 {
1727         struct stat st;
1728         char zfile[MAXPATHLEN];
1729         int c;
1730
1731         for (c = 0; c < COMPRESS_TYPES; c++) {
1732                 (void) strlcpy(zfile, logfile, MAXPATHLEN);
1733                 (void) strlcat(zfile, compress_type[c].suffix, MAXPATHLEN);
1734                 if (lstat(zfile, &st) == 0)
1735                         return (compress_type[c].suffix);
1736         }
1737         return (NULL);
1738 }
1739
1740 static fk_entry
1741 do_rotate(const struct conf_entry *ent)
1742 {
1743         char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1744         char file1[MAXPATHLEN], file2[MAXPATHLEN];
1745         char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1746         const char *logfile_suffix;
1747         char datetimestr[30];
1748         int flags, numlogs_c;
1749         fk_entry free_or_keep;
1750         struct sigwork_entry *swork;
1751         struct stat st;
1752         struct tm tm;
1753         time_t now;
1754
1755         flags = ent->flags;
1756         free_or_keep = FREE_ENT;
1757
1758         if (archtodir) {
1759                 char *p;
1760
1761                 /* build complete name of archive directory into dirpart */
1762                 if (*archdirname == '/') {      /* absolute */
1763                         strlcpy(dirpart, archdirname, sizeof(dirpart));
1764                 } else {        /* relative */
1765                         /* get directory part of logfile */
1766                         strlcpy(dirpart, ent->log, sizeof(dirpart));
1767                         if ((p = strrchr(dirpart, '/')) == NULL)
1768                                 dirpart[0] = '\0';
1769                         else
1770                                 *(p + 1) = '\0';
1771                         strlcat(dirpart, archdirname, sizeof(dirpart));
1772                 }
1773
1774                 /* check if archive directory exists, if not, create it */
1775                 if (lstat(dirpart, &st))
1776                         createdir(ent, dirpart);
1777
1778                 /* get filename part of logfile */
1779                 if ((p = strrchr(ent->log, '/')) == NULL)
1780                         strlcpy(namepart, ent->log, sizeof(namepart));
1781                 else
1782                         strlcpy(namepart, p + 1, sizeof(namepart));
1783         } else {
1784                 /*
1785                  * Tell utility functions we are not using an archive
1786                  * dir.
1787                  */
1788                 dirpart[0] = '\0';
1789                 strlcpy(namepart, ent->log, sizeof(namepart));
1790         }
1791
1792         /* Delete old logs */
1793         if (timefnamefmt != NULL)
1794                 delete_oldest_timelog(ent, dirpart);
1795         else {
1796                 /*
1797                  * Handle cleaning up after legacy newsyslog where we
1798                  * kept ent->numlogs + 1 files.  This code can go away
1799                  * at some point in the future.
1800                  */
1801                 delete_classiclog(dirpart, namepart, ent->numlogs);
1802
1803                 if (ent->numlogs > 0)
1804                         delete_classiclog(dirpart, namepart, ent->numlogs - 1);
1805
1806         }
1807
1808         if (timefnamefmt != NULL) {
1809                 /* If time functions fails we can't really do any sensible */
1810                 if (time(&now) == (time_t)-1 ||
1811                     localtime_r(&now, &tm) == NULL)
1812                         bzero(&tm, sizeof(tm));
1813
1814                 strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm);
1815                 if (archtodir)
1816                         (void) snprintf(file1, sizeof(file1), "%s/%s.%s",
1817                             dirpart, namepart, datetimestr);
1818                 else
1819                         (void) snprintf(file1, sizeof(file1), "%s.%s",
1820                             ent->log, datetimestr);
1821
1822                 /* Don't run the code to move down logs */
1823                 numlogs_c = -1;
1824         } else {
1825                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1826                     ent->numlogs - 1);
1827                 numlogs_c = ent->numlogs - 2;           /* copy for countdown */
1828         }
1829
1830         /* Move down log files */
1831         for (; numlogs_c >= 0; numlogs_c--) {
1832                 (void) strlcpy(file2, file1, sizeof(file2));
1833
1834                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1835                     numlogs_c);
1836
1837                 logfile_suffix = get_logfile_suffix(file1);
1838                 if (logfile_suffix == NULL)
1839                         continue;
1840                 (void) strlcpy(zfile1, file1, MAXPATHLEN);
1841                 (void) strlcpy(zfile2, file2, MAXPATHLEN);
1842                 (void) strlcat(zfile1, logfile_suffix, MAXPATHLEN);
1843                 (void) strlcat(zfile2, logfile_suffix, MAXPATHLEN);
1844
1845                 if (noaction)
1846                         printf("\tmv %s %s\n", zfile1, zfile2);
1847                 else {
1848                         /* XXX - Ought to be checking for failure! */
1849                         (void)rename(zfile1, zfile2);
1850                         change_attrs(zfile2, ent);
1851                         if (ent->compress && !strlen(logfile_suffix)) {
1852                                 /* compress old rotation */
1853                                 struct zipwork_entry zwork;
1854
1855                                 memset(&zwork, 0, sizeof(zwork));
1856                                 zwork.zw_conf = ent;
1857                                 zwork.zw_fsize = sizefile(zfile2);
1858                                 strcpy(zwork.zw_fname, zfile2);
1859                                 do_zipwork(&zwork);
1860                         }
1861                 }
1862         }
1863
1864         if (ent->numlogs > 0) {
1865                 if (noaction) {
1866                         /*
1867                          * Note that savelog() may succeed with using link()
1868                          * for the archtodir case, but there is no good way
1869                          * of knowing if it will when doing "noaction", so
1870                          * here we claim that it will have to do a copy...
1871                          */
1872                         if (archtodir)
1873                                 printf("\tcp %s %s\n", ent->log, file1);
1874                         else
1875                                 printf("\tln %s %s\n", ent->log, file1);
1876                         printf("\ttouch %s\t\t"
1877                             "# Update mtime for 'when'-interval processing\n",
1878                             file1);
1879                 } else {
1880                         if (!(flags & CE_BINARY)) {
1881                                 /* Report the trimming to the old log */
1882                                 log_trim(ent->log, ent);
1883                         }
1884                         savelog(ent->log, file1);
1885                         /*
1886                          * Interval-based rotations are done using the mtime of
1887                          * the most recently archived log, so make sure it gets
1888                          * updated during a rotation.
1889                          */
1890                         utimes(file1, NULL);
1891                 }
1892                 change_attrs(file1, ent);
1893         }
1894
1895         /* Create the new log file and move it into place */
1896         if (noaction)
1897                 printf("Start new log...\n");
1898         createlog(ent);
1899
1900         /*
1901          * Save all signalling and file-compression to be done after log
1902          * files from all entries have been rotated.  This way any one
1903          * process will not be sent the same signal multiple times when
1904          * multiple log files had to be rotated.
1905          */
1906         swork = NULL;
1907         if (ent->pid_cmd_file != NULL)
1908                 swork = save_sigwork(ent);
1909         if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) {
1910                 if (!(ent->flags & CE_PLAIN0) ||
1911                     strcmp(&file1[strlen(file1) - 2], ".0") != 0) {
1912                         /*
1913                          * The zipwork_entry will include a pointer to this
1914                          * conf_entry, so the conf_entry should not be freed.
1915                          */
1916                         free_or_keep = KEEP_ENT;
1917                         save_zipwork(ent, swork, ent->fsize, file1);
1918                 }
1919         }
1920
1921         return (free_or_keep);
1922 }
1923
1924 static void
1925 do_sigwork(struct sigwork_entry *swork)
1926 {
1927         struct sigwork_entry *nextsig;
1928         int kres, secs;
1929         char *tmp;
1930
1931         if (swork->sw_runcmd == 0 && (!(swork->sw_pidok) || swork->sw_pid == 0))
1932                 return;                 /* no work to do... */
1933
1934         /*
1935          * If nosignal (-s) was specified, then do not signal any process.
1936          * Note that a nosignal request triggers a warning message if the
1937          * rotated logfile needs to be compressed, *unless* -R was also
1938          * specified.  We assume that an `-sR' request came from a process
1939          * which writes to the logfile, and as such, we assume that process
1940          * has already made sure the logfile is not presently in use.  This
1941          * just sets swork->sw_pidok to a special value, and do_zipwork
1942          * will print any necessary warning(s).
1943          */
1944         if (nosignal) {
1945                 if (!rotatereq)
1946                         swork->sw_pidok = -1;
1947                 return;
1948         }
1949
1950         /*
1951          * Compute the pause between consecutive signals.  Use a longer
1952          * sleep time if we will be sending two signals to the same
1953          * daemon or process-group.
1954          */
1955         secs = 0;
1956         nextsig = SLIST_NEXT(swork, sw_nextp);
1957         if (nextsig != NULL) {
1958                 if (swork->sw_pid == nextsig->sw_pid)
1959                         secs = 10;
1960                 else
1961                         secs = 1;
1962         }
1963
1964         if (noaction) {
1965                 if (swork->sw_runcmd)
1966                         printf("\tsh -c '%s %d'\n", swork->sw_fname,
1967                             swork->sw_signum);
1968                 else {
1969                         printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1970                             (int)swork->sw_pid, swork->sw_fname);
1971                         if (secs > 0)
1972                                 printf("\tsleep %d\n", secs);
1973                 }
1974                 return;
1975         }
1976
1977         if (swork->sw_runcmd) {
1978                 asprintf(&tmp, "%s %d", swork->sw_fname, swork->sw_signum);
1979                 if (tmp == NULL) {
1980                         warn("can't allocate memory to run %s",
1981                             swork->sw_fname);
1982                         return;
1983                 }
1984                 if (verbose)
1985                         printf("Run command: %s\n", tmp);
1986                 kres = system(tmp);
1987                 if (kres) {
1988                         warnx("%s: returned non-zero exit code: %d",
1989                             tmp, kres);
1990                 }
1991                 free(tmp);
1992                 return;
1993         }
1994
1995         kres = kill(swork->sw_pid, swork->sw_signum);
1996         if (kres != 0) {
1997                 /*
1998                  * Assume that "no such process" (ESRCH) is something
1999                  * to warn about, but is not an error.  Presumably the
2000                  * process which writes to the rotated log file(s) is
2001                  * gone, in which case we should have no problem with
2002                  * compressing the rotated log file(s).
2003                  */
2004                 if (errno != ESRCH)
2005                         swork->sw_pidok = 0;
2006                 warn("can't notify %s, pid %d = %s", swork->sw_pidtype,
2007                     (int)swork->sw_pid, swork->sw_fname);
2008         } else {
2009                 if (verbose)
2010                         printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
2011                             (int)swork->sw_pid, swork->sw_fname);
2012                 if (secs > 0) {
2013                         if (verbose)
2014                                 printf("Pause %d second(s) between signals\n",
2015                                     secs);
2016                         sleep(secs);
2017                 }
2018         }
2019 }
2020
2021 static void
2022 do_zipwork(struct zipwork_entry *zwork)
2023 {
2024         const char *pgm_name, *pgm_path;
2025         int errsav, fcount, zstatus;
2026         pid_t pidzip, wpid;
2027         char zresult[MAXPATHLEN];
2028         char command[BUFSIZ];
2029         char **args;
2030         int c;
2031
2032         assert(zwork != NULL);
2033         pgm_path = NULL;
2034         strlcpy(zresult, zwork->zw_fname, sizeof(zresult));
2035         args = calloc(ARGS_NUM, sizeof(*args));
2036         if (args == NULL)
2037                 err(1, "calloc()");
2038         if (zwork->zw_conf != NULL &&
2039             zwork->zw_conf->compress > COMPRESS_NONE)
2040                 for (c = 1; c < COMPRESS_TYPES; c++) {
2041                         if (zwork->zw_conf->compress == c) {
2042                                 pgm_path = compress_type[c].path;
2043                                 (void) strlcat(zresult,
2044                                     compress_type[c].suffix, sizeof(zresult));
2045                                 /* the first argument is always NULL, skip it */
2046                                 for (c = 1; c < ARGS_NUM; c++) {
2047                                         if (compress_type[c].args[c] == NULL)
2048                                                 break;
2049                                         args[c] = compress_type[c].args[c];
2050                                 }
2051                                 break;
2052                         }
2053                 }
2054         if (pgm_path == NULL) {
2055                 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname);
2056                 return;
2057         }
2058         pgm_name = strrchr(pgm_path, '/');
2059         if (pgm_name == NULL)
2060                 pgm_name = pgm_path;
2061         else
2062                 pgm_name++;
2063
2064         args[0] = strdup(pgm_name);
2065         if (args[0] == NULL)
2066                 err(1, "strdup()");
2067         for (c = 0; args[c] != NULL; c++)
2068                 ;
2069         args[c] = zwork->zw_fname;
2070
2071         if (zwork->zw_swork != NULL && zwork->zw_swork->sw_runcmd == 0 &&
2072             zwork->zw_swork->sw_pidok <= 0) {
2073                 warnx(
2074                     "log %s not compressed because daemon(s) not notified",
2075                     zwork->zw_fname);
2076                 change_attrs(zwork->zw_fname, zwork->zw_conf);
2077                 return;
2078         }
2079
2080         strlcpy(command, pgm_path, sizeof(command));
2081         for (c = 1; args[c] != NULL; c++) {
2082                 strlcat(command, " ", sizeof(command));
2083                 strlcat(command, args[c], sizeof(command));
2084         }
2085         if (noaction) {
2086                 printf("\t%s %s\n", pgm_name, zwork->zw_fname);
2087                 change_attrs(zresult, zwork->zw_conf);
2088                 return;
2089         }
2090
2091         if (verbose) {
2092                 printf("Executing: %s\n", command);
2093         }
2094         fcount = 1;
2095         pidzip = fork();
2096         while (pidzip < 0) {
2097                 /*
2098                  * The fork failed.  If the failure was due to a temporary
2099                  * problem, then wait a short time and try it again.
2100                  */
2101                 errsav = errno;
2102                 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname);
2103                 if (errsav != EAGAIN || fcount > 5)
2104                         errx(1, "Exiting...");
2105                 sleep(fcount * 12);
2106                 fcount++;
2107                 pidzip = fork();
2108         }
2109         if (!pidzip) {
2110                 /* The child process executes the compression command */
2111                 execv(pgm_path, (char *const*) args);
2112                 err(1, "execv(`%s')", command);
2113         }
2114
2115         wpid = waitpid(pidzip, &zstatus, 0);
2116         if (wpid == -1) {
2117                 /* XXX - should this be a fatal error? */
2118                 warn("%s: waitpid(%d)", pgm_path, pidzip);
2119                 return;
2120         }
2121         if (!WIFEXITED(zstatus)) {
2122                 warnx("`%s' did not terminate normally", command);
2123                 free(args[0]);
2124                 free(args);
2125                 return;
2126         }
2127         if (WEXITSTATUS(zstatus)) {
2128                 warnx("`%s' terminated with a non-zero status (%d)", command,
2129                     WEXITSTATUS(zstatus));
2130                 free(args[0]);
2131                 free(args);
2132                 return;
2133         }
2134
2135         free(args[0]);
2136         free(args);
2137         /* Compression was successful, set file attributes on the result. */
2138         change_attrs(zresult, zwork->zw_conf);
2139 }
2140
2141 /*
2142  * Save information on any process we need to signal.  Any single
2143  * process may need to be sent different signal-values for different
2144  * log files, but usually a single signal-value will cause the process
2145  * to close and re-open all of its log files.
2146  */
2147 static struct sigwork_entry *
2148 save_sigwork(const struct conf_entry *ent)
2149 {
2150         struct sigwork_entry *sprev, *stmp;
2151         int ndiff;
2152         size_t tmpsiz;
2153
2154         sprev = NULL;
2155         ndiff = 1;
2156         SLIST_FOREACH(stmp, &swhead, sw_nextp) {
2157                 ndiff = strcmp(ent->pid_cmd_file, stmp->sw_fname);
2158                 if (ndiff > 0)
2159                         break;
2160                 if (ndiff == 0) {
2161                         if (ent->sig == stmp->sw_signum)
2162                                 break;
2163                         if (ent->sig > stmp->sw_signum) {
2164                                 ndiff = 1;
2165                                 break;
2166                         }
2167                 }
2168                 sprev = stmp;
2169         }
2170         if (stmp != NULL && ndiff == 0)
2171                 return (stmp);
2172
2173         tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_cmd_file) + 1;
2174         stmp = malloc(tmpsiz);
2175
2176         stmp->sw_runcmd = 0;
2177         /* If this is a command to run we just set the flag and run command */
2178         if (ent->flags & CE_PID2CMD) {
2179                 stmp->sw_pid = -1;
2180                 stmp->sw_pidok = 0;
2181                 stmp->sw_runcmd = 1;
2182         } else {
2183                 set_swpid(stmp, ent);
2184         }
2185         stmp->sw_signum = ent->sig;
2186         strcpy(stmp->sw_fname, ent->pid_cmd_file);
2187         if (sprev == NULL)
2188                 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
2189         else
2190                 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
2191         return (stmp);
2192 }
2193
2194 /*
2195  * Save information on any file we need to compress.  We may see the same
2196  * file multiple times, so check the full list to avoid duplicates.  The
2197  * list itself is sorted smallest-to-largest, because that's the order we
2198  * want to compress the files.  If the partition is very low on disk space,
2199  * then the smallest files are the most likely to compress, and compressing
2200  * them first will free up more space for the larger files.
2201  */
2202 static struct zipwork_entry *
2203 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
2204     int zsize, const char *zipfname)
2205 {
2206         struct zipwork_entry *zprev, *ztmp;
2207         int ndiff;
2208         size_t tmpsiz;
2209
2210         /* Compute the size if the caller did not know it. */
2211         if (zsize < 0)
2212                 zsize = sizefile(zipfname);
2213
2214         zprev = NULL;
2215         ndiff = 1;
2216         SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
2217                 ndiff = strcmp(zipfname, ztmp->zw_fname);
2218                 if (ndiff == 0)
2219                         break;
2220                 if (zsize > ztmp->zw_fsize)
2221                         zprev = ztmp;
2222         }
2223         if (ztmp != NULL && ndiff == 0)
2224                 return (ztmp);
2225
2226         tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
2227         ztmp = malloc(tmpsiz);
2228         ztmp->zw_conf = ent;
2229         ztmp->zw_swork = swork;
2230         ztmp->zw_fsize = zsize;
2231         strcpy(ztmp->zw_fname, zipfname);
2232         if (zprev == NULL)
2233                 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
2234         else
2235                 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
2236         return (ztmp);
2237 }
2238
2239 /* Send a signal to the pid specified by pidfile */
2240 static void
2241 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
2242 {
2243         FILE *f;
2244         long minok, maxok, rval;
2245         char *endp, *linep, line[BUFSIZ];
2246
2247         minok = MIN_PID;
2248         maxok = MAX_PID;
2249         swork->sw_pidok = 0;
2250         swork->sw_pid = 0;
2251         swork->sw_pidtype = "daemon";
2252         if (ent->flags & CE_SIGNALGROUP) {
2253                 /*
2254                  * If we are expected to signal a process-group when
2255                  * rotating this logfile, then the value read in should
2256                  * be the negative of a valid process ID.
2257                  */
2258                 minok = -MAX_PID;
2259                 maxok = -MIN_PID;
2260                 swork->sw_pidtype = "process-group";
2261         }
2262
2263         f = fopen(ent->pid_cmd_file, "r");
2264         if (f == NULL) {
2265                 if (errno == ENOENT && enforcepid == 0) {
2266                         /*
2267                          * Warn if the PID file doesn't exist, but do
2268                          * not consider it an error.  Most likely it
2269                          * means the process has been terminated,
2270                          * so it should be safe to rotate any log
2271                          * files that the process would have been using.
2272                          */
2273                         swork->sw_pidok = 1;
2274                         warnx("pid file doesn't exist: %s", ent->pid_cmd_file);
2275                 } else
2276                         warn("can't open pid file: %s", ent->pid_cmd_file);
2277                 return;
2278         }
2279
2280         if (fgets(line, BUFSIZ, f) == NULL) {
2281                 /*
2282                  * Warn if the PID file is empty, but do not consider
2283                  * it an error.  Most likely it means the process has
2284                  * has terminated, so it should be safe to rotate any
2285                  * log files that the process would have been using.
2286                  */
2287                 if (feof(f) && enforcepid == 0) {
2288                         swork->sw_pidok = 1;
2289                         warnx("pid/cmd file is empty: %s", ent->pid_cmd_file);
2290                 } else
2291                         warn("can't read from pid file: %s", ent->pid_cmd_file);
2292                 (void)fclose(f);
2293                 return;
2294         }
2295         (void)fclose(f);
2296
2297         errno = 0;
2298         linep = line;
2299         while (*linep == ' ')
2300                 linep++;
2301         rval = strtol(linep, &endp, 10);
2302         if (*endp != '\0' && !isspacech(*endp)) {
2303                 warnx("pid file does not start with a valid number: %s",
2304                     ent->pid_cmd_file);
2305         } else if (rval < minok || rval > maxok) {
2306                 warnx("bad value '%ld' for process number in %s",
2307                     rval, ent->pid_cmd_file);
2308                 if (verbose)
2309                         warnx("\t(expecting value between %ld and %ld)",
2310                             minok, maxok);
2311         } else {
2312                 swork->sw_pidok = 1;
2313                 swork->sw_pid = rval;
2314         }
2315
2316         return;
2317 }
2318
2319 /* Log the fact that the logs were turned over */
2320 static int
2321 log_trim(const char *logname, const struct conf_entry *log_ent)
2322 {
2323         FILE *f;
2324         const char *xtra;
2325
2326         if ((f = fopen(logname, "a")) == NULL)
2327                 return (-1);
2328         xtra = "";
2329         if (log_ent->def_cfg)
2330                 xtra = " using <default> rule";
2331         if (log_ent->flags & CE_RFC5424) {
2332                 if (log_ent->firstcreate) {
2333                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s\n",
2334                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2335                             daytime_rfc5424, hostname, getpid(),
2336                             "logfile first created", xtra);
2337                 } else if (log_ent->r_reason != NULL) {
2338                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s%s\n",
2339                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2340                             daytime_rfc5424, hostname, getpid(),
2341                             "logfile turned over", log_ent->r_reason, xtra);
2342                 } else {
2343                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s\n",
2344                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2345                             daytime_rfc5424, hostname, getpid(),
2346                             "logfile turned over", xtra);
2347                 }
2348         } else {
2349                 if (log_ent->firstcreate)
2350                         fprintf(f,
2351                             "%s %.*s newsyslog[%d]: logfile first created%s\n",
2352                             daytime, (int)hostname_shortlen, hostname, getpid(),
2353                             xtra);
2354                 else if (log_ent->r_reason != NULL)
2355                         fprintf(f,
2356                             "%s %.*s newsyslog[%d]: logfile turned over%s%s\n",
2357                             daytime, (int)hostname_shortlen, hostname, getpid(),
2358                             log_ent->r_reason, xtra);
2359                 else
2360                         fprintf(f,
2361                             "%s %.*s newsyslog[%d]: logfile turned over%s\n",
2362                             daytime, (int)hostname_shortlen, hostname, getpid(),
2363                             xtra);
2364         }
2365         if (fclose(f) == EOF)
2366                 err(1, "log_trim: fclose");
2367         return (0);
2368 }
2369
2370 /* Return size in kilobytes of a file */
2371 static int
2372 sizefile(const char *file)
2373 {
2374         struct stat sb;
2375
2376         if (stat(file, &sb) < 0)
2377                 return (-1);
2378         return (kbytes(sb.st_size));
2379 }
2380
2381 /*
2382  * Return the mtime of the most recent archive of the logfile, using timestamp
2383  * based filenames.
2384  */
2385 static time_t
2386 mtime_old_timelog(const char *file)
2387 {
2388         struct stat sb;
2389         struct tm tm;
2390         int dir_fd;
2391         time_t t;
2392         struct dirent *dp;
2393         DIR *dirp;
2394         char *logfname, *logfnamebuf, *dir, *dirbuf;
2395
2396         t = -1;
2397
2398         if ((dirbuf = strdup(file)) == NULL) {
2399                 warn("strdup() of '%s'", file);
2400                 return (t);
2401         }
2402         dir = dirname(dirbuf);
2403         if ((logfnamebuf = strdup(file)) == NULL) {
2404                 warn("strdup() of '%s'", file);
2405                 free(dirbuf);
2406                 return (t);
2407         }
2408         logfname = basename(logfnamebuf);
2409         if (logfname[0] == '/') {
2410                 warnx("Invalid log filename '%s'", logfname);
2411                 goto out;
2412         }
2413
2414         if ((dirp = opendir(dir)) == NULL) {
2415                 warn("Cannot open log directory '%s'", dir);
2416                 goto out;
2417         }
2418         dir_fd = dirfd(dirp);
2419         /* Open the archive dir and find the most recent archive of logfname. */
2420         while ((dp = readdir(dirp)) != NULL) {
2421                 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0)
2422                         continue;
2423
2424                 if (fstatat(dir_fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) == -1) {
2425                         warn("Cannot stat '%s'", file);
2426                         continue;
2427                 }
2428                 if (t < sb.st_mtime)
2429                         t = sb.st_mtime;
2430         }
2431         closedir(dirp);
2432
2433 out:
2434         free(dirbuf);
2435         free(logfnamebuf);
2436         return (t);
2437 }
2438
2439 /* Return the age in hours of the most recent archive of the logfile. */
2440 static int
2441 age_old_log(const char *file)
2442 {
2443         struct stat sb;
2444         const char *logfile_suffix;
2445         char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1];
2446         time_t mtime;
2447
2448         if (archtodir) {
2449                 char *p;
2450
2451                 /* build name of archive directory into tmp */
2452                 if (*archdirname == '/') {      /* absolute */
2453                         strlcpy(tmp, archdirname, sizeof(tmp));
2454                 } else {        /* relative */
2455                         /* get directory part of logfile */
2456                         strlcpy(tmp, file, sizeof(tmp));
2457                         if ((p = strrchr(tmp, '/')) == NULL)
2458                                 tmp[0] = '\0';
2459                         else
2460                                 *(p + 1) = '\0';
2461                         strlcat(tmp, archdirname, sizeof(tmp));
2462                 }
2463
2464                 strlcat(tmp, "/", sizeof(tmp));
2465
2466                 /* get filename part of logfile */
2467                 if ((p = strrchr(file, '/')) == NULL)
2468                         strlcat(tmp, file, sizeof(tmp));
2469                 else
2470                         strlcat(tmp, p + 1, sizeof(tmp));
2471         } else {
2472                 (void) strlcpy(tmp, file, sizeof(tmp));
2473         }
2474
2475         if (timefnamefmt != NULL) {
2476                 mtime = mtime_old_timelog(tmp);
2477                 if (mtime == -1)
2478                         return (-1);
2479         } else {
2480                 strlcat(tmp, ".0", sizeof(tmp));
2481                 logfile_suffix = get_logfile_suffix(tmp);
2482                 if (logfile_suffix == NULL)
2483                         return (-1);
2484                 (void) strlcat(tmp, logfile_suffix, sizeof(tmp));
2485                 if (stat(tmp, &sb) < 0)
2486                         return (-1);
2487                 mtime = sb.st_mtime;
2488         }
2489
2490         return ((int)(ptimeget_secs(timenow) - mtime + 1800) / 3600);
2491 }
2492
2493 /* Skip Over Blanks */
2494 static char *
2495 sob(char *p)
2496 {
2497         while (p && *p && isspace(*p))
2498                 p++;
2499         return (p);
2500 }
2501
2502 /* Skip Over Non-Blanks */
2503 static char *
2504 son(char *p)
2505 {
2506         while (p && *p && !isspace(*p))
2507                 p++;
2508         return (p);
2509 }
2510
2511 /* Check if string is actually a number */
2512 static int
2513 isnumberstr(const char *string)
2514 {
2515         while (*string) {
2516                 if (!isdigitch(*string++))
2517                         return (0);
2518         }
2519         return (1);
2520 }
2521
2522 /* Check if string contains a glob */
2523 static int
2524 isglobstr(const char *string)
2525 {
2526         char chr;
2527
2528         while ((chr = *string++)) {
2529                 if (chr == '*' || chr == '?' || chr == '[')
2530                         return (1);
2531         }
2532         return (0);
2533 }
2534
2535 /*
2536  * Save the active log file under a new name.  A link to the new name
2537  * is the quick-and-easy way to do this.  If that fails (which it will
2538  * if the destination is on another partition), then make a copy of
2539  * the file to the new location.
2540  */
2541 static void
2542 savelog(char *from, char *to)
2543 {
2544         FILE *src, *dst;
2545         int c, res;
2546
2547         res = link(from, to);
2548         if (res == 0)
2549                 return;
2550
2551         if ((src = fopen(from, "r")) == NULL)
2552                 err(1, "can't fopen %s for reading", from);
2553         if ((dst = fopen(to, "w")) == NULL)
2554                 err(1, "can't fopen %s for writing", to);
2555
2556         while ((c = getc(src)) != EOF) {
2557                 if ((putc(c, dst)) == EOF)
2558                         err(1, "error writing to %s", to);
2559         }
2560
2561         if (ferror(src))
2562                 err(1, "error reading from %s", from);
2563         if ((fclose(src)) != 0)
2564                 err(1, "can't fclose %s", to);
2565         if ((fclose(dst)) != 0)
2566                 err(1, "can't fclose %s", from);
2567 }
2568
2569 /* create one or more directory components of a path */
2570 static void
2571 createdir(const struct conf_entry *ent, char *dirpart)
2572 {
2573         int res;
2574         char *s, *d;
2575         char mkdirpath[MAXPATHLEN];
2576         struct stat st;
2577
2578         s = dirpart;
2579         d = mkdirpath;
2580
2581         for (;;) {
2582                 *d++ = *s++;
2583                 if (*s != '/' && *s != '\0')
2584                         continue;
2585                 *d = '\0';
2586                 res = lstat(mkdirpath, &st);
2587                 if (res != 0) {
2588                         if (noaction) {
2589                                 printf("\tmkdir %s\n", mkdirpath);
2590                         } else {
2591                                 res = mkdir(mkdirpath, 0755);
2592                                 if (res != 0)
2593                                         err(1, "Error on mkdir(\"%s\") for -a",
2594                                             mkdirpath);
2595                         }
2596                 }
2597                 if (*s == '\0')
2598                         break;
2599         }
2600         if (verbose) {
2601                 if (ent->firstcreate)
2602                         printf("Created directory '%s' for new %s\n",
2603                             dirpart, ent->log);
2604                 else
2605                         printf("Created directory '%s' for -a\n", dirpart);
2606         }
2607 }
2608
2609 /*
2610  * Create a new log file, destroying any currently-existing version
2611  * of the log file in the process.  If the caller wants a backup copy
2612  * of the file to exist, they should call 'link(logfile,logbackup)'
2613  * before calling this routine.
2614  */
2615 void
2616 createlog(const struct conf_entry *ent)
2617 {
2618         int fd, failed;
2619         struct stat st;
2620         char *realfile, *slash, tempfile[MAXPATHLEN];
2621
2622         fd = -1;
2623         realfile = ent->log;
2624
2625         /*
2626          * If this log file is being created for the first time (-C option),
2627          * then it may also be true that the parent directory does not exist
2628          * yet.  Check, and create that directory if it is missing.
2629          */
2630         if (ent->firstcreate) {
2631                 strlcpy(tempfile, realfile, sizeof(tempfile));
2632                 slash = strrchr(tempfile, '/');
2633                 if (slash != NULL) {
2634                         *slash = '\0';
2635                         failed = stat(tempfile, &st);
2636                         if (failed && errno != ENOENT)
2637                                 err(1, "Error on stat(%s)", tempfile);
2638                         if (failed)
2639                                 createdir(ent, tempfile);
2640                         else if (!S_ISDIR(st.st_mode))
2641                                 errx(1, "%s exists but is not a directory",
2642                                     tempfile);
2643                 }
2644         }
2645
2646         /*
2647          * First create an unused filename, so it can be chown'ed and
2648          * chmod'ed before it is moved into the real location.  mkstemp
2649          * will create the file mode=600 & owned by us.  Note that all
2650          * temp files will have a suffix of '.z<something>'.
2651          */
2652         strlcpy(tempfile, realfile, sizeof(tempfile));
2653         strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2654         if (noaction)
2655                 printf("\tmktemp %s\n", tempfile);
2656         else {
2657                 fd = mkstemp(tempfile);
2658                 if (fd < 0)
2659                         err(1, "can't mkstemp logfile %s", tempfile);
2660
2661                 /*
2662                  * Add status message to what will become the new log file.
2663                  */
2664                 if (!(ent->flags & CE_BINARY)) {
2665                         if (log_trim(tempfile, ent))
2666                                 err(1, "can't add status message to log");
2667                 }
2668         }
2669
2670         /* Change the owner/group, if we are supposed to */
2671         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2672                 if (noaction)
2673                         printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2674                             tempfile);
2675                 else {
2676                         failed = fchown(fd, ent->uid, ent->gid);
2677                         if (failed)
2678                                 err(1, "can't fchown temp file %s", tempfile);
2679                 }
2680         }
2681
2682         /* Turn on NODUMP if it was requested in the config-file. */
2683         if (ent->flags & CE_NODUMP) {
2684                 if (noaction)
2685                         printf("\tchflags nodump %s\n", tempfile);
2686                 else {
2687                         failed = fchflags(fd, UF_NODUMP);
2688                         if (failed) {
2689                                 warn("log_trim: fchflags(NODUMP)");
2690                         }
2691                 }
2692         }
2693
2694         /*
2695          * Note that if the real logfile still exists, and if the call
2696          * to rename() fails, then "neither the old file nor the new
2697          * file shall be changed or created" (to quote the standard).
2698          * If the call succeeds, then the file will be replaced without
2699          * any window where some other process might find that the file
2700          * did not exist.
2701          * XXX - ? It may be that for some error conditions, we could
2702          *      retry by first removing the realfile and then renaming.
2703          */
2704         if (noaction) {
2705                 printf("\tchmod %o %s\n", ent->permissions, tempfile);
2706                 printf("\tmv %s %s\n", tempfile, realfile);
2707         } else {
2708                 failed = fchmod(fd, ent->permissions);
2709                 if (failed)
2710                         err(1, "can't fchmod temp file '%s'", tempfile);
2711                 failed = rename(tempfile, realfile);
2712                 if (failed)
2713                         err(1, "can't mv %s to %s", tempfile, realfile);
2714         }
2715
2716         if (fd >= 0)
2717                 close(fd);
2718 }
2719
2720 /*
2721  * Change the attributes of a given filename to what was specified in
2722  * the newsyslog.conf entry.  This routine is only called for files
2723  * that newsyslog expects that it has created, and thus it is a fatal
2724  * error if this routine finds that the file does not exist.
2725  */
2726 static void
2727 change_attrs(const char *fname, const struct conf_entry *ent)
2728 {
2729         int failed;
2730
2731         if (noaction) {
2732                 printf("\tchmod %o %s\n", ent->permissions, fname);
2733
2734                 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2735                         printf("\tchown %u:%u %s\n",
2736                             ent->uid, ent->gid, fname);
2737
2738                 if (ent->flags & CE_NODUMP)
2739                         printf("\tchflags nodump %s\n", fname);
2740                 return;
2741         }
2742
2743         failed = chmod(fname, ent->permissions);
2744         if (failed) {
2745                 if (errno != EPERM)
2746                         err(1, "chmod(%s) in change_attrs", fname);
2747                 warn("change_attrs couldn't chmod(%s)", fname);
2748         }
2749
2750         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2751                 failed = chown(fname, ent->uid, ent->gid);
2752                 if (failed)
2753                         warn("can't chown %s", fname);
2754         }
2755
2756         if (ent->flags & CE_NODUMP) {
2757                 failed = chflags(fname, UF_NODUMP);
2758                 if (failed)
2759                         warn("can't chflags %s NODUMP", fname);
2760         }
2761 }
2762
2763 /*
2764  * Parse a signal number or signal name. Returns the signal number parsed or -1
2765  * on failure.
2766  */
2767 static int
2768 parse_signal(const char *str)
2769 {
2770         int sig, i;
2771         const char *errstr;
2772
2773         sig = strtonum(str, 1, sys_nsig - 1, &errstr);
2774
2775         if (errstr == NULL)
2776                 return (sig);
2777         if (strncasecmp(str, "SIG", 3) == 0)
2778                 str += 3;
2779
2780         for (i = 1; i < sys_nsig; i++) {
2781                 if (strcasecmp(str, sys_signame[i]) == 0)
2782                         return (i);
2783         }
2784
2785         return (-1);
2786 }