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/sbuf.h>
  64 #include <sys/stat.h>
  65 #include <sys/wait.h>
  66
  67 #include <assert.h>
  68 #include <ctype.h>
  69 #include <err.h>
  70 #include <errno.h>
  71 #include <dirent.h>
  72 #include <fcntl.h>
  73 #include <fnmatch.h>
  74 #include <glob.h>
  75 #include <grp.h>
  76 #include <paths.h>
  77 #include <pwd.h>
  78 #include <signal.h>
  79 #include <stdio.h>
  80 #include <libgen.h>
  81 #include <stdlib.h>
  82 #include <string.h>
  83 #include <syslog.h>
  84 #include <time.h>
  85 #include <unistd.h>
  86
  87 #include "pathnames.h"
  88 #include "extern.h"
  89
  90 /*
  91  * Compression types
  92  */
  93 #define COMPRESS_TYPES  5       /* Number of supported compression types */
  94
  95 #define COMPRESS_NONE   0
  96 #define COMPRESS_GZIP   1
  97 #define COMPRESS_BZIP2  2
  98 #define COMPRESS_XZ     3
  99 #define COMPRESS_ZSTD   4
 100
 101 /*
 102  * Bit-values for the 'flags' parsed from a config-file entry.
 103  */
 104 #define CE_BINARY       0x0008  /* Logfile is in binary, do not add status */
 105                                 /*    messages to logfile(s) when rotating. */
 106 #define CE_NOSIGNAL     0x0010  /* There is no process to signal when */
 107                                 /*    trimming this file. */
 108 #define CE_TRIMAT       0x0020  /* trim file at a specific time. */
 109 #define CE_GLOB         0x0040  /* name of the log is file name pattern. */
 110 #define CE_SIGNALGROUP  0x0080  /* Signal a process-group instead of a single */
 111                                 /*    process when trimming this file. */
 112 #define CE_CREATE       0x0100  /* Create the log file if it does not exist. */
 113 #define CE_NODUMP       0x0200  /* Set 'nodump' on newly created log file. */
 114 #define CE_PID2CMD      0x0400  /* Replace PID file with a shell command.*/
 115 #define CE_PLAIN0       0x0800  /* Do not compress zero'th history file */
 116 #define CE_RFC5424      0x1000  /* Use RFC5424 format rotation message */
 117
 118 #define MIN_PID         5       /* Don't touch pids lower than this */
 119 #define MAX_PID         99999   /* was lower, see /usr/include/sys/proc.h */
 120
 121 #define kbytes(size)  (((size) + 1023) >> 10)
 122
 123 #define DEFAULT_MARKER  "<default>"
 124 #define DEBUG_MARKER    "<debug>"
 125 #define INCLUDE_MARKER  "<include>"
 126 #define DEFAULT_TIMEFNAME_FMT   "%Y%m%dT%H%M%S"
 127
 128 #define MAX_OLDLOGS 65536       /* Default maximum number of old logfiles */
 129
 130 struct compress_types {
 131         const char *flag;       /* Flag in configuration file */
 132         const char *suffix;     /* Compression suffix */
 133         const char *path;       /* Path to compression program */
 134         const char **flags;     /* Compression program flags */
 135         int nflags;             /* Program flags count */
 136 };
 137
 138 static const char *gzip_flags[] = { "-f" };
 139 #define bzip2_flags gzip_flags
 140 #define xz_flags gzip_flags
 141 static const char *zstd_flags[] = { "-q", "--rm" };
 142
 143 static const struct compress_types compress_type[COMPRESS_TYPES] = {
 144         { "", "", "", NULL, 0 },
 145         { "Z", ".gz", _PATH_GZIP, gzip_flags, nitems(gzip_flags) },
 146         { "J", ".bz2", _PATH_BZIP2, bzip2_flags, nitems(bzip2_flags) },
 147         { "X", ".xz", _PATH_XZ, xz_flags, nitems(xz_flags) },
 148         { "Y", ".zst", _PATH_ZSTD, zstd_flags, nitems(zstd_flags) }
 149 };
 150
 151 struct conf_entry {
 152         STAILQ_ENTRY(conf_entry) cf_nextp;
 153         char *log;              /* Name of the log */
 154         char *pid_cmd_file;             /* PID or command file */
 155         char *r_reason;         /* The reason this file is being rotated */
 156         int firstcreate;        /* Creating log for the first time (-C). */
 157         int rotate;             /* Non-zero if this file should be rotated */
 158         int fsize;              /* size found for the log file */
 159         uid_t uid;              /* Owner of log */
 160         gid_t gid;              /* Group of log */
 161         int numlogs;            /* Number of logs to keep */
 162         int trsize;             /* Size cutoff to trigger trimming the log */
 163         int hours;              /* Hours between log trimming */
 164         struct ptime_data *trim_at;     /* Specific time to do trimming */
 165         unsigned int permissions;       /* File permissions on the log */
 166         int flags;              /* CE_BINARY */
 167         int compress;           /* Compression */
 168         int sig;                /* Signal to send */
 169         int def_cfg;            /* Using the <default> rule for this file */
 170 };
 171
 172 struct sigwork_entry {
 173         SLIST_ENTRY(sigwork_entry) sw_nextp;
 174         int      sw_signum;             /* the signal to send */
 175         int      sw_pidok;              /* true if pid value is valid */
 176         pid_t    sw_pid;                /* the process id from the PID file */
 177         const char *sw_pidtype;         /* "daemon" or "process group" */
 178         int      sw_runcmd;             /* run command or send PID to signal */
 179         char     sw_fname[1];           /* file the PID was read from or shell cmd */
 180 };
 181
 182 struct zipwork_entry {
 183         SLIST_ENTRY(zipwork_entry) zw_nextp;
 184         const struct conf_entry *zw_conf;       /* for chown/perm/flag info */
 185         const struct sigwork_entry *zw_swork;   /* to know success of signal */
 186         int      zw_fsize;              /* size of the file to compress */
 187         char     zw_fname[1];           /* the file to compress */
 188 };
 189
 190 struct include_entry {
 191         STAILQ_ENTRY(include_entry) inc_nextp;
 192         const char *file;       /* Name of file to process */
 193 };
 194
 195 struct oldlog_entry {
 196         char *fname;            /* Filename of the log file */
 197         time_t t;               /* Parsed timestamp of the logfile */
 198 };
 199
 200 typedef enum {
 201         FREE_ENT, KEEP_ENT
 202 }       fk_entry;
 203
 204 STAILQ_HEAD(cflist, conf_entry);
 205 static SLIST_HEAD(swlisthead, sigwork_entry) swhead =
 206     SLIST_HEAD_INITIALIZER(swhead);
 207 static SLIST_HEAD(zwlisthead, zipwork_entry) zwhead =
 208     SLIST_HEAD_INITIALIZER(zwhead);
 209 STAILQ_HEAD(ilist, include_entry);
 210
 211 int dbg_at_times;               /* -D Show details of 'trim_at' code */
 212
 213 static int archtodir = 0;       /* Archive old logfiles to other directory */
 214 static int createlogs;          /* Create (non-GLOB) logfiles which do not */
 215                                 /*    already exist.  1=='for entries with */
 216                                 /*    C flag', 2=='for all entries'. */
 217 int verbose = 0;                /* Print out what's going on */
 218 static int needroot = 1;        /* Root privs are necessary */
 219 int noaction = 0;               /* Don't do anything, just show it */
 220 static int norotate = 0;        /* Don't rotate */
 221 static int nosignal;            /* Do not send any signals */
 222 static int enforcepid = 0;      /* If PID file does not exist or empty, do nothing */
 223 static int force = 0;           /* Force the trim no matter what */
 224 static int rotatereq = 0;       /* -R = Always rotate the file(s) as given */
 225                                 /*    on the command (this also requires   */
 226                                 /*    that a list of files *are* given on  */
 227                                 /*    the run command). */
 228 static char *requestor;         /* The name given on a -R request */
 229 static char *timefnamefmt = NULL;/* Use time based filenames instead of .0 */
 230 static char *archdirname;       /* Directory path to old logfiles archive */
 231 static char *destdir = NULL;    /* Directory to treat at root for logs */
 232 static const char *conf;        /* Configuration file to use */
 233
 234 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */
 235 static struct ptime_data *timenow; /* The time to use for checking at-fields */
 236
 237 #define DAYTIME_LEN     16
 238 static char daytime[DAYTIME_LEN];/* The current time in human readable form,
 239                                   * used for rotation-tracking messages. */
 240
 241 /* Another buffer to hold the current time in RFC5424 format. Fractional
 242  * seconds are allowed by the RFC, but are not included in the
 243  * rotation-tracking messages written by newsyslog and so are not accounted for
 244  * in the length below.
 245  */
 246 #define DAYTIME_RFC5424_LEN     sizeof("YYYY-MM-DDTHH:MM:SS+00:00")
 247 static char daytime_rfc5424[DAYTIME_RFC5424_LEN];
 248
 249 static char hostname[MAXHOSTNAMELEN]; /* hostname */
 250 static size_t hostname_shortlen;
 251
 252 static const char *path_syslogpid = _PATH_SYSLOGPID;
 253
 254 static struct cflist *get_worklist(char **files);
 255 static void parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
 256                     struct conf_entry **defconf, struct ilist *inclist);
 257 static void add_to_queue(const char *fname, struct ilist *inclist);
 258 static char *sob(char *p);
 259 static char *son(char *p);
 260 static int isnumberstr(const char *);
 261 static int isglobstr(const char *);
 262 static char *missing_field(char *p, char *errline);
 263 static void      change_attrs(const char *, const struct conf_entry *);
 264 static const char *get_logfile_suffix(const char *logfile);
 265 static fk_entry  do_entry(struct conf_entry *);
 266 static fk_entry  do_rotate(const struct conf_entry *);
 267 static void      do_sigwork(struct sigwork_entry *);
 268 static void      do_zipwork(struct zipwork_entry *);
 269 static struct sigwork_entry *
 270                  save_sigwork(const struct conf_entry *);
 271 static struct zipwork_entry *
 272                  save_zipwork(const struct conf_entry *, const struct
 273                     sigwork_entry *, int, const char *);
 274 static void      set_swpid(struct sigwork_entry *, const struct conf_entry *);
 275 static int       sizefile(const char *);
 276 static void expand_globs(struct cflist *work_p, struct cflist *glob_p);
 277 static void free_clist(struct cflist *list);
 278 static void free_entry(struct conf_entry *ent);
 279 static struct conf_entry *init_entry(const char *fname,
 280                 struct conf_entry *src_entry);
 281 static void parse_args(int argc, char **argv);
 282 static int parse_doption(const char *doption);
 283 static void usage(void);
 284 static int log_trim(const char *logname, const struct conf_entry *log_ent);
 285 static int age_old_log(const char *file);
 286 static void savelog(char *from, char *to);
 287 static void createdir(const struct conf_entry *ent, char *dirpart);
 288 static void createlog(const struct conf_entry *ent);
 289 static int parse_signal(const char *str);
 290
 291 /*
 292  * All the following take a parameter of 'int', but expect values in the
 293  * range of unsigned char.  Define wrappers which take values of type 'char',
 294  * whether signed or unsigned, and ensure they end up in the right range.
 295  */
 296 #define isdigitch(Anychar) isdigit((u_char)(Anychar))
 297 #define isprintch(Anychar) isprint((u_char)(Anychar))
 298 #define isspacech(Anychar) isspace((u_char)(Anychar))
 299 #define tolowerch(Anychar) tolower((u_char)(Anychar))
 300
 301 int
 302 main(int argc, char **argv)
 303 {
 304         struct cflist *worklist;
 305         struct conf_entry *p;
 306         struct sigwork_entry *stmp;
 307         struct zipwork_entry *ztmp;
 308
 309         SLIST_INIT(&swhead);
 310         SLIST_INIT(&zwhead);
 311
 312         parse_args(argc, argv);
 313         argc -= optind;
 314         argv += optind;
 315
 316         if (needroot && getuid() && geteuid())
 317                 errx(1, "must have root privs");
 318         worklist = get_worklist(argv);
 319
 320         /*
 321          * Rotate all the files which need to be rotated.  Note that
 322          * some users have *hundreds* of entries in newsyslog.conf!
 323          */
 324         while (!STAILQ_EMPTY(worklist)) {
 325                 p = STAILQ_FIRST(worklist);
 326                 STAILQ_REMOVE_HEAD(worklist, cf_nextp);
 327                 if (do_entry(p) == FREE_ENT)
 328                         free_entry(p);
 329         }
 330
 331         /*
 332          * Send signals to any processes which need a signal to tell
 333          * them to close and re-open the log file(s) we have rotated.
 334          * Note that zipwork_entries include pointers to these
 335          * sigwork_entry's, so we can not free the entries here.
 336          */
 337         if (!SLIST_EMPTY(&swhead)) {
 338                 if (noaction || verbose)
 339                         printf("Signal all daemon process(es)...\n");
 340                 SLIST_FOREACH(stmp, &swhead, sw_nextp)
 341                         do_sigwork(stmp);
 342                 if (!(rotatereq && nosignal)) {
 343                         if (noaction)
 344                                 printf("\tsleep 10\n");
 345                         else {
 346                                 if (verbose)
 347                                         printf("Pause 10 seconds to allow "
 348                                             "daemon(s) to close log file(s)\n");
 349                                 sleep(10);
 350                         }
 351                 }
 352         }
 353         /*
 354          * Compress all files that we're expected to compress, now
 355          * that all processes should have closed the files which
 356          * have been rotated.
 357          */
 358         if (!SLIST_EMPTY(&zwhead)) {
 359                 if (noaction || verbose)
 360                         printf("Compress all rotated log file(s)...\n");
 361                 while (!SLIST_EMPTY(&zwhead)) {
 362                         ztmp = SLIST_FIRST(&zwhead);
 363                         do_zipwork(ztmp);
 364                         SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
 365                         free(ztmp);
 366                 }
 367         }
 368         /* Now free all the sigwork entries. */
 369         while (!SLIST_EMPTY(&swhead)) {
 370                 stmp = SLIST_FIRST(&swhead);
 371                 SLIST_REMOVE_HEAD(&swhead, sw_nextp);
 372                 free(stmp);
 373         }
 374
 375         while (wait(NULL) > 0 || errno == EINTR)
 376                 ;
 377         return (0);
 378 }
 379
 380 static struct conf_entry *
 381 init_entry(const char *fname, struct conf_entry *src_entry)
 382 {
 383         struct conf_entry *tempwork;
 384
 385         if (verbose > 4)
 386                 printf("\t--> [creating entry for %s]\n", fname);
 387
 388         tempwork = malloc(sizeof(struct conf_entry));
 389         if (tempwork == NULL)
 390                 err(1, "malloc of conf_entry for %s", fname);
 391
 392         if (destdir == NULL || fname[0] != '/')
 393                 tempwork->log = strdup(fname);
 394         else
 395                 asprintf(&tempwork->log, "%s%s", destdir, fname);
 396         if (tempwork->log == NULL)
 397                 err(1, "strdup for %s", fname);
 398
 399         if (src_entry != NULL) {
 400                 tempwork->pid_cmd_file = NULL;
 401                 if (src_entry->pid_cmd_file)
 402                         tempwork->pid_cmd_file = strdup(src_entry->pid_cmd_file);
 403                 tempwork->r_reason = NULL;
 404                 tempwork->firstcreate = 0;
 405                 tempwork->rotate = 0;
 406                 tempwork->fsize = -1;
 407                 tempwork->uid = src_entry->uid;
 408                 tempwork->gid = src_entry->gid;
 409                 tempwork->numlogs = src_entry->numlogs;
 410                 tempwork->trsize = src_entry->trsize;
 411                 tempwork->hours = src_entry->hours;
 412                 tempwork->trim_at = NULL;
 413                 if (src_entry->trim_at != NULL)
 414                         tempwork->trim_at = ptime_init(src_entry->trim_at);
 415                 tempwork->permissions = src_entry->permissions;
 416                 tempwork->flags = src_entry->flags;
 417                 tempwork->compress = src_entry->compress;
 418                 tempwork->sig = src_entry->sig;
 419                 tempwork->def_cfg = src_entry->def_cfg;
 420         } else {
 421                 /* Initialize as a "do-nothing" entry */
 422                 tempwork->pid_cmd_file = NULL;
 423                 tempwork->r_reason = NULL;
 424                 tempwork->firstcreate = 0;
 425                 tempwork->rotate = 0;
 426                 tempwork->fsize = -1;
 427                 tempwork->uid = (uid_t)-1;
 428                 tempwork->gid = (gid_t)-1;
 429                 tempwork->numlogs = 1;
 430                 tempwork->trsize = -1;
 431                 tempwork->hours = -1;
 432                 tempwork->trim_at = NULL;
 433                 tempwork->permissions = 0;
 434                 tempwork->flags = 0;
 435                 tempwork->compress = COMPRESS_NONE;
 436                 tempwork->sig = SIGHUP;
 437                 tempwork->def_cfg = 0;
 438         }
 439
 440         return (tempwork);
 441 }
 442
 443 static void
 444 free_entry(struct conf_entry *ent)
 445 {
 446
 447         if (ent == NULL)
 448                 return;
 449
 450         if (ent->log != NULL) {
 451                 if (verbose > 4)
 452                         printf("\t--> [freeing entry for %s]\n", ent->log);
 453                 free(ent->log);
 454                 ent->log = NULL;
 455         }
 456
 457         if (ent->pid_cmd_file != NULL) {
 458                 free(ent->pid_cmd_file);
 459                 ent->pid_cmd_file = NULL;
 460         }
 461
 462         if (ent->r_reason != NULL) {
 463                 free(ent->r_reason);
 464                 ent->r_reason = NULL;
 465         }
 466
 467         if (ent->trim_at != NULL) {
 468                 ptime_free(ent->trim_at);
 469                 ent->trim_at = NULL;
 470         }
 471
 472         free(ent);
 473 }
 474
 475 static void
 476 free_clist(struct cflist *list)
 477 {
 478         struct conf_entry *ent;
 479
 480         while (!STAILQ_EMPTY(list)) {
 481                 ent = STAILQ_FIRST(list);
 482                 STAILQ_REMOVE_HEAD(list, cf_nextp);
 483                 free_entry(ent);
 484         }
 485
 486         free(list);
 487         list = NULL;
 488 }
 489
 490 static fk_entry
 491 do_entry(struct conf_entry * ent)
 492 {
 493 #define REASON_MAX      80
 494         int modtime;
 495         fk_entry free_or_keep;
 496         double diffsecs;
 497         char temp_reason[REASON_MAX];
 498         int oversized;
 499
 500         free_or_keep = FREE_ENT;
 501         if (verbose)
 502                 printf("%s <%d%s>: ", ent->log, ent->numlogs,
 503                     compress_type[ent->compress].flag);
 504         ent->fsize = sizefile(ent->log);
 505         oversized = ((ent->trsize > 0) && (ent->fsize >= ent->trsize));
 506         modtime = age_old_log(ent->log);
 507         ent->rotate = 0;
 508         ent->firstcreate = 0;
 509         if (ent->fsize < 0) {
 510                 /*
 511                  * If either the C flag or the -C option was specified,
 512                  * and if we won't be creating the file, then have the
 513                  * verbose message include a hint as to why the file
 514                  * will not be created.
 515                  */
 516                 temp_reason[0] = '\0';
 517                 if (createlogs > 1)
 518                         ent->firstcreate = 1;
 519                 else if ((ent->flags & CE_CREATE) && createlogs)
 520                         ent->firstcreate = 1;
 521                 else if (ent->flags & CE_CREATE)
 522                         strlcpy(temp_reason, " (no -C option)", REASON_MAX);
 523                 else if (createlogs)
 524                         strlcpy(temp_reason, " (no C flag)", REASON_MAX);
 525
 526                 if (ent->firstcreate) {
 527                         if (verbose)
 528                                 printf("does not exist -> will create.\n");
 529                         createlog(ent);
 530                 } else if (verbose) {
 531                         printf("does not exist, skipped%s.\n", temp_reason);
 532                 }
 533         } else {
 534                 if (ent->flags & CE_TRIMAT && !force && !rotatereq &&
 535                     !oversized) {
 536                         diffsecs = ptimeget_diff(timenow, ent->trim_at);
 537                         if (diffsecs < 0.0) {
 538                                 /* trim_at is some time in the future. */
 539                                 if (verbose) {
 540                                         ptime_adjust4dst(ent->trim_at,
 541                                             timenow);
 542                                         printf("--> will trim at %s",
 543                                             ptimeget_ctime(ent->trim_at));
 544                                 }
 545                                 return (free_or_keep);
 546                         } else if (diffsecs >= 3600.0) {
 547                                 /*
 548                                  * trim_at is more than an hour in the past,
 549                                  * so find the next valid trim_at time, and
 550                                  * tell the user what that will be.
 551                                  */
 552                                 if (verbose && dbg_at_times)
 553                                         printf("\n\t--> prev trim at %s\t",
 554                                             ptimeget_ctime(ent->trim_at));
 555                                 if (verbose) {
 556                                         ptimeset_nxtime(ent->trim_at);
 557                                         printf("--> will trim at %s",
 558                                             ptimeget_ctime(ent->trim_at));
 559                                 }
 560                                 return (free_or_keep);
 561                         } else if (verbose && noaction && dbg_at_times) {
 562                                 /*
 563                                  * If we are just debugging at-times, then
 564                                  * a detailed message is helpful.  Also
 565                                  * skip "doing" any commands, since they
 566                                  * would all be turned off by no-action.
 567                                  */
 568                                 printf("\n\t--> timematch at %s",
 569                                     ptimeget_ctime(ent->trim_at));
 570                                 return (free_or_keep);
 571                         } else if (verbose && ent->hours <= 0) {
 572                                 printf("--> time is up\n");
 573                         }
 574                 }
 575                 if (verbose && (ent->trsize > 0))
 576                         printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
 577                 if (verbose && (ent->hours > 0))
 578                         printf(" age (hr): %d [%d] ", modtime, ent->hours);
 579
 580                 /*
 581                  * Figure out if this logfile needs to be rotated.
 582                  */
 583                 temp_reason[0] = '\0';
 584                 if (rotatereq) {
 585                         ent->rotate = 1;
 586                         snprintf(temp_reason, REASON_MAX, " due to -R from %s",
 587                             requestor);
 588                 } else if (force) {
 589                         ent->rotate = 1;
 590                         snprintf(temp_reason, REASON_MAX, " due to -F request");
 591                 } else if (oversized) {
 592                         ent->rotate = 1;
 593                         snprintf(temp_reason, REASON_MAX, " due to size>%dK",
 594                             ent->trsize);
 595                 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
 596                         ent->rotate = 1;
 597                 } else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
 598                     (modtime < 0))) {
 599                         ent->rotate = 1;
 600                 }
 601
 602                 /*
 603                  * If the file needs to be rotated, then rotate it.
 604                  */
 605                 if (ent->rotate && !norotate) {
 606                         if (temp_reason[0] != '\0')
 607                                 ent->r_reason = strdup(temp_reason);
 608                         if (verbose)
 609                                 printf("--> trimming log....\n");
 610                         if (noaction && !verbose)
 611                                 printf("%s <%d%s>: trimming\n", ent->log,
 612                                     ent->numlogs,
 613                                     compress_type[ent->compress].flag);
 614                         free_or_keep = do_rotate(ent);
 615                 } else {
 616                         if (verbose)
 617                                 printf("--> skipping\n");
 618                 }
 619         }
 620         return (free_or_keep);
 621 #undef REASON_MAX
 622 }
 623
 624 static void
 625 parse_args(int argc, char **argv)
 626 {
 627         int ch;
 628         char *p;
 629
 630         timenow = ptime_init(NULL);
 631         ptimeset_time(timenow, time(NULL));
 632         strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN);
 633         ptimeget_ctime_rfc5424(timenow, daytime_rfc5424, DAYTIME_RFC5424_LEN);
 634
 635         /* Let's get our hostname */
 636         (void)gethostname(hostname, sizeof(hostname));
 637         hostname_shortlen = strcspn(hostname, ".");
 638
 639         /* Parse command line options. */
 640         while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1)
 641                 switch (ch) {
 642                 case 'a':
 643                         archtodir++;
 644                         archdirname = optarg;
 645                         break;
 646                 case 'd':
 647                         destdir = optarg;
 648                         break;
 649                 case 'f':
 650                         conf = optarg;
 651                         break;
 652                 case 'n':
 653                         noaction++;
 654                         /* FALLTHROUGH */
 655                 case 'r':
 656                         needroot = 0;
 657                         break;
 658                 case 's':
 659                         nosignal = 1;
 660                         break;
 661                 case 't':
 662                         if (optarg[0] == '\0' ||
 663                             strcmp(optarg, "DEFAULT") == 0)
 664                                 timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT);
 665                         else
 666                                 timefnamefmt = strdup(optarg);
 667                         break;
 668                 case 'v':
 669                         verbose++;
 670                         break;
 671                 case 'C':
 672                         /* Useful for things like rc.diskless... */
 673                         createlogs++;
 674                         break;
 675                 case 'D':
 676                         /*
 677                          * Set some debugging option.  The specific option
 678                          * depends on the value of optarg.  These options
 679                          * may come and go without notice or documentation.
 680                          */
 681                         if (parse_doption(optarg))
 682                                 break;
 683                         usage();
 684                         /* NOTREACHED */
 685                 case 'F':
 686                         force++;
 687                         break;
 688                 case 'N':
 689                         norotate++;
 690                         break;
 691                 case 'P':
 692                         enforcepid++;
 693                         break;
 694                 case 'R':
 695                         rotatereq++;
 696                         requestor = strdup(optarg);
 697                         break;
 698                 case 'S':
 699                         path_syslogpid = optarg;
 700                         break;
 701                 case 'm':       /* Used by OpenBSD for "monitor mode" */
 702                 default:
 703                         usage();
 704                         /* NOTREACHED */
 705                 }
 706
 707         if (force && norotate) {
 708                 warnx("Only one of -F and -N may be specified.");
 709                 usage();
 710                 /* NOTREACHED */
 711         }
 712
 713         if (rotatereq) {
 714                 if (optind == argc) {
 715                         warnx("At least one filename must be given when -R is specified.");
 716                         usage();
 717                         /* NOTREACHED */
 718                 }
 719                 /* Make sure "requestor" value is safe for a syslog message. */
 720                 for (p = requestor; *p != '\0'; p++) {
 721                         if (!isprintch(*p) && (*p != '\t'))
 722                                 *p = '.';
 723                 }
 724         }
 725
 726         if (dbg_timenow) {
 727                 /*
 728                  * Note that the 'daytime' variable is not changed.
 729                  * That is only used in messages that track when a
 730                  * logfile is rotated, and if a file *is* rotated,
 731                  * then it will still rotated at the "real now" time.
 732                  */
 733                 ptime_free(timenow);
 734                 timenow = dbg_timenow;
 735                 fprintf(stderr, "Debug: Running as if TimeNow is %s",
 736                     ptimeget_ctime(dbg_timenow));
 737         }
 738
 739 }
 740
 741 /*
 742  * These debugging options are mainly meant for developer use, such
 743  * as writing regression-tests.  They would not be needed by users
 744  * during normal operation of newsyslog...
 745  */
 746 static int
 747 parse_doption(const char *doption)
 748 {
 749         const char TN[] = "TN=";
 750         int res;
 751
 752         if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
 753                 /*
 754                  * The "TimeNow" debugging option.  This might be off
 755                  * by an hour when crossing a timezone change.
 756                  */
 757                 dbg_timenow = ptime_init(NULL);
 758                 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
 759                     time(NULL), doption + sizeof(TN) - 1);
 760                 if (res == -2) {
 761                         warnx("Non-existent time specified on -D %s", doption);
 762                         return (0);                     /* failure */
 763                 } else if (res < 0) {
 764                         warnx("Malformed time given on -D %s", doption);
 765                         return (0);                     /* failure */
 766                 }
 767                 return (1);                     /* successfully parsed */
 768
 769         }
 770
 771         if (strcmp(doption, "ats") == 0) {
 772                 dbg_at_times++;
 773                 return (1);                     /* successfully parsed */
 774         }
 775
 776         /* XXX - This check could probably be dropped. */
 777         if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder")
 778             == 0)) {
 779                 warnx("NOTE: newsyslog always uses 'neworder'.");
 780                 return (1);                     /* successfully parsed */
 781         }
 782
 783         warnx("Unknown -D (debug) option: '%s'", doption);
 784         return (0);                             /* failure */
 785 }
 786
 787 static void
 788 usage(void)
 789 {
 790
 791         fprintf(stderr,
 792             "usage: newsyslog [-CFNPnrsv] [-a directory] [-d directory] [-f config_file]\n"
 793             "                 [-S pidfile] [-t timefmt] [[-R tagname] file ...]\n");
 794         exit(1);
 795 }
 796
 797 /*
 798  * Parse a configuration file and return a linked list of all the logs
 799  * which should be processed.
 800  */
 801 static struct cflist *
 802 get_worklist(char **files)
 803 {
 804         FILE *f;
 805         char **given;
 806         struct cflist *cmdlist, *filelist, *globlist;
 807         struct conf_entry *defconf, *dupent, *ent;
 808         struct ilist inclist;
 809         struct include_entry *inc;
 810         int gmatch, fnres;
 811
 812         defconf = NULL;
 813         STAILQ_INIT(&inclist);
 814
 815         filelist = malloc(sizeof(struct cflist));
 816         if (filelist == NULL)
 817                 err(1, "malloc of filelist");
 818         STAILQ_INIT(filelist);
 819         globlist = malloc(sizeof(struct cflist));
 820         if (globlist == NULL)
 821                 err(1, "malloc of globlist");
 822         STAILQ_INIT(globlist);
 823
 824         inc = malloc(sizeof(struct include_entry));
 825         if (inc == NULL)
 826                 err(1, "malloc of inc");
 827         inc->file = conf;
 828         if (inc->file == NULL)
 829                 inc->file = _PATH_CONF;
 830         STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp);
 831
 832         STAILQ_FOREACH(inc, &inclist, inc_nextp) {
 833                 if (strcmp(inc->file, "-") != 0)
 834                         f = fopen(inc->file, "r");
 835                 else {
 836                         f = stdin;
 837                         inc->file = "<stdin>";
 838                 }
 839                 if (!f)
 840                         err(1, "%s", inc->file);
 841
 842                 if (verbose)
 843                         printf("Processing %s\n", inc->file);
 844                 parse_file(f, filelist, globlist, &defconf, &inclist);
 845                 (void) fclose(f);
 846         }
 847
 848         /*
 849          * All config-file information has been read in and turned into
 850          * a filelist and a globlist.  If there were no specific files
 851          * given on the run command, then the only thing left to do is to
 852          * call a routine which finds all files matched by the globlist
 853          * and adds them to the filelist.  Then return the worklist.
 854          */
 855         if (*files == NULL) {
 856                 expand_globs(filelist, globlist);
 857                 free_clist(globlist);
 858                 if (defconf != NULL)
 859                         free_entry(defconf);
 860                 return (filelist);
 861         }
 862
 863         /*
 864          * If newsyslog was given a specific list of files to process,
 865          * it may be that some of those files were not listed in any
 866          * config file.  Those unlisted files should get the default
 867          * rotation action.  First, create the default-rotation action
 868          * if none was found in a system config file.
 869          */
 870         if (defconf == NULL) {
 871                 defconf = init_entry(DEFAULT_MARKER, NULL);
 872                 defconf->numlogs = 3;
 873                 defconf->trsize = 50;
 874                 defconf->permissions = S_IRUSR|S_IWUSR;
 875         }
 876
 877         /*
 878          * If newsyslog was run with a list of specific filenames,
 879          * then create a new worklist which has only those files in
 880          * it, picking up the rotation-rules for those files from
 881          * the original filelist.
 882          *
 883          * XXX - Note that this will copy multiple rules for a single
 884          *      logfile, if multiple entries are an exact match for
 885          *      that file.  That matches the historic behavior, but do
 886          *      we want to continue to allow it?  If so, it should
 887          *      probably be handled more intelligently.
 888          */
 889         cmdlist = malloc(sizeof(struct cflist));
 890         if (cmdlist == NULL)
 891                 err(1, "malloc of cmdlist");
 892         STAILQ_INIT(cmdlist);
 893
 894         for (given = files; *given; ++given) {
 895                 /*
 896                  * First try to find exact-matches for this given file.
 897                  */
 898                 gmatch = 0;
 899                 STAILQ_FOREACH(ent, filelist, cf_nextp) {
 900                         if (strcmp(ent->log, *given) == 0) {
 901                                 gmatch++;
 902                                 dupent = init_entry(*given, ent);
 903                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 904                         }
 905                 }
 906                 if (gmatch) {
 907                         if (verbose > 2)
 908                                 printf("\t+ Matched entry %s\n", *given);
 909                         continue;
 910                 }
 911
 912                 /*
 913                  * There was no exact-match for this given file, so look
 914                  * for a "glob" entry which does match.
 915                  */
 916                 gmatch = 0;
 917                 if (verbose > 2)
 918                         printf("\t+ Checking globs for %s\n", *given);
 919                 STAILQ_FOREACH(ent, globlist, cf_nextp) {
 920                         fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
 921                         if (verbose > 2)
 922                                 printf("\t+    = %d for pattern %s\n", fnres,
 923                                     ent->log);
 924                         if (fnres == 0) {
 925                                 gmatch++;
 926                                 dupent = init_entry(*given, ent);
 927                                 /* This new entry is not a glob! */
 928                                 dupent->flags &= ~CE_GLOB;
 929                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 930                                 /* Only allow a match to one glob-entry */
 931                                 break;
 932                         }
 933                 }
 934                 if (gmatch) {
 935                         if (verbose > 2)
 936                                 printf("\t+ Matched %s via %s\n", *given,
 937                                     ent->log);
 938                         continue;
 939                 }
 940
 941                 /*
 942                  * This given file was not found in any config file, so
 943                  * add a worklist item based on the default entry.
 944                  */
 945                 if (verbose > 2)
 946                         printf("\t+ No entry matched %s  (will use %s)\n",
 947                             *given, DEFAULT_MARKER);
 948                 dupent = init_entry(*given, defconf);
 949                 /* Mark that it was *not* found in a config file */
 950                 dupent->def_cfg = 1;
 951                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 952         }
 953
 954         /*
 955          * Free all the entries in the original work list, the list of
 956          * glob entries, and the default entry.
 957          */
 958         free_clist(filelist);
 959         free_clist(globlist);
 960         free_entry(defconf);
 961
 962         /* And finally, return a worklist which matches the given files. */
 963         return (cmdlist);
 964 }
 965
 966 /*
 967  * Expand the list of entries with filename patterns, and add all files
 968  * which match those glob-entries onto the worklist.
 969  */
 970 static void
 971 expand_globs(struct cflist *work_p, struct cflist *glob_p)
 972 {
 973         int gmatch, gres;
 974         size_t i;
 975         char *mfname;
 976         struct conf_entry *dupent, *ent, *globent;
 977         glob_t pglob;
 978         struct stat st_fm;
 979
 980         /*
 981          * The worklist contains all fully-specified (non-GLOB) names.
 982          *
 983          * Now expand the list of filename-pattern (GLOB) entries into
 984          * a second list, which (by definition) will only match files
 985          * that already exist.  Do not add a glob-related entry for any
 986          * file which already exists in the fully-specified list.
 987          */
 988         STAILQ_FOREACH(globent, glob_p, cf_nextp) {
 989                 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
 990                 if (gres != 0) {
 991                         warn("cannot expand pattern (%d): %s", gres,
 992                             globent->log);
 993                         continue;
 994                 }
 995
 996                 if (verbose > 2)
 997                         printf("\t+ Expanding pattern %s\n", globent->log);
 998                 for (i = 0; i < pglob.gl_matchc; i++) {
 999                         mfname = pglob.gl_pathv[i];
1000
1001                         /* See if this file already has a specific entry. */
1002                         gmatch = 0;
1003                         STAILQ_FOREACH(ent, work_p, cf_nextp) {
1004                                 if (strcmp(mfname, ent->log) == 0) {
1005                                         gmatch++;
1006                                         break;
1007                                 }
1008                         }
1009                         if (gmatch)
1010                                 continue;
1011
1012                         /* Make sure the named matched is a file. */
1013                         gres = lstat(mfname, &st_fm);
1014                         if (gres != 0) {
1015                                 /* Error on a file that glob() matched?!? */
1016                                 warn("Skipping %s - lstat() error", mfname);
1017                                 continue;
1018                         }
1019                         if (!S_ISREG(st_fm.st_mode)) {
1020                                 /* We only rotate files! */
1021                                 if (verbose > 2)
1022                                         printf("\t+  . skipping %s (!file)\n",
1023                                             mfname);
1024                                 continue;
1025                         }
1026
1027                         if (verbose > 2)
1028                                 printf("\t+  . add file %s\n", mfname);
1029                         dupent = init_entry(mfname, globent);
1030                         /* This new entry is not a glob! */
1031                         dupent->flags &= ~CE_GLOB;
1032
1033                         /* Add to the worklist. */
1034                         STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp);
1035                 }
1036                 globfree(&pglob);
1037                 if (verbose > 2)
1038                         printf("\t+ Done with pattern %s\n", globent->log);
1039         }
1040 }
1041
1042 /*
1043  * Parse a configuration file and update a linked list of all the logs to
1044  * process.
1045  */
1046 static void
1047 parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
1048     struct conf_entry **defconf_p, struct ilist *inclist)
1049 {
1050         char line[BUFSIZ], *parse, *q;
1051         char *cp, *errline, *group;
1052         struct conf_entry *working;
1053         struct passwd *pwd;
1054         struct group *grp;
1055         glob_t pglob;
1056         int eol, ptm_opts, res, special;
1057         size_t i;
1058
1059         errline = NULL;
1060         while (fgets(line, BUFSIZ, cf)) {
1061                 if ((line[0] == '\n') || (line[0] == '#') ||
1062                     (strlen(line) == 0))
1063                         continue;
1064                 if (errline != NULL)
1065                         free(errline);
1066                 errline = strdup(line);
1067                 for (cp = line + 1; *cp != '\0'; cp++) {
1068                         if (*cp != '#')
1069                                 continue;
1070                         if (*(cp - 1) == '\\') {
1071                                 strcpy(cp - 1, cp);
1072                                 cp--;
1073                                 continue;
1074                         }
1075                         *cp = '\0';
1076                         break;
1077                 }
1078
1079                 q = parse = missing_field(sob(line), errline);
1080                 parse = son(line);
1081                 if (!*parse) {
1082                         warnx("malformed line (missing fields):\n%s",
1083                             errline);
1084                         continue;
1085                 }
1086                 *parse = '\0';
1087
1088                 /*
1089                  * Allow people to set debug options via the config file.
1090                  * (NOTE: debug options are undocumented, and may disappear
1091                  * at any time, etc).
1092                  */
1093                 if (strcasecmp(DEBUG_MARKER, q) == 0) {
1094                         q = parse = missing_field(sob(parse + 1), errline);
1095                         parse = son(parse);
1096                         if (!*parse)
1097                                 warnx("debug line specifies no option:\n%s",
1098                                     errline);
1099                         else {
1100                                 *parse = '\0';
1101                                 parse_doption(q);
1102                         }
1103                         continue;
1104                 } else if (strcasecmp(INCLUDE_MARKER, q) == 0) {
1105                         if (verbose)
1106                                 printf("Found: %s", errline);
1107                         q = parse = missing_field(sob(parse + 1), errline);
1108                         parse = son(parse);
1109                         if (!*parse) {
1110                                 warnx("include line missing argument:\n%s",
1111                                     errline);
1112                                 continue;
1113                         }
1114
1115                         *parse = '\0';
1116
1117                         if (isglobstr(q)) {
1118                                 res = glob(q, GLOB_NOCHECK, NULL, &pglob);
1119                                 if (res != 0) {
1120                                         warn("cannot expand pattern (%d): %s",
1121                                             res, q);
1122                                         continue;
1123                                 }
1124
1125                                 if (verbose > 2)
1126                                         printf("\t+ Expanding pattern %s\n", q);
1127
1128                                 for (i = 0; i < pglob.gl_matchc; i++)
1129                                         add_to_queue(pglob.gl_pathv[i],
1130                                             inclist);
1131                                 globfree(&pglob);
1132                         } else
1133                                 add_to_queue(q, inclist);
1134                         continue;
1135                 }
1136
1137 #define badline(msg, ...) do {          \
1138         warnx(msg, __VA_ARGS__);        \
1139         goto cleanup;                   \
1140 } while (0)
1141
1142                 special = 0;
1143                 working = init_entry(q, NULL);
1144                 if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1145                         special = 1;
1146                         if (*defconf_p != NULL)
1147                                 badline("Ignoring duplicate entry for %s!", q);
1148                         *defconf_p = working;
1149                 }
1150
1151                 q = parse = missing_field(sob(parse + 1), errline);
1152                 parse = son(parse);
1153                 if (!*parse)
1154                         badline("malformed line (missing fields):\n%s",
1155                             errline);
1156                 *parse = '\0';
1157                 if ((group = strchr(q, ':')) != NULL ||
1158                     (group = strrchr(q, '.')) != NULL) {
1159                         *group++ = '\0';
1160                         if (*q) {
1161                                 if (!(isnumberstr(q))) {
1162                                         if ((pwd = getpwnam(q)) == NULL)
1163                                                 badline(
1164                                      "error in config file; unknown user:\n%s",
1165                                                     errline);
1166                                         working->uid = pwd->pw_uid;
1167                                 } else
1168                                         working->uid = atoi(q);
1169                         } else
1170                                 working->uid = (uid_t)-1;
1171
1172                         q = group;
1173                         if (*q) {
1174                                 if (!(isnumberstr(q))) {
1175                                         if ((grp = getgrnam(q)) == NULL)
1176                                                 badline(
1177                                     "error in config file; unknown group:\n%s",
1178                                                     errline);
1179                                         working->gid = grp->gr_gid;
1180                                 } else
1181                                         working->gid = atoi(q);
1182                         } else
1183                                 working->gid = (gid_t)-1;
1184
1185                         q = parse = missing_field(sob(parse + 1), errline);
1186                         parse = son(parse);
1187                         if (!*parse)
1188                                 badline("malformed line (missing fields):\n%s",
1189                                     errline);
1190                         *parse = '\0';
1191                 } else {
1192                         working->uid = (uid_t)-1;
1193                         working->gid = (gid_t)-1;
1194                 }
1195
1196                 if (!sscanf(q, "%o", &working->permissions))
1197                         badline("error in config file; bad permissions:\n%s",
1198                             errline);
1199                 if ((working->permissions & ~DEFFILEMODE) != 0) {
1200                         warnx("File mode bits 0%o changed to 0%o in line:\n%s",
1201                             working->permissions,
1202                             working->permissions & DEFFILEMODE, errline);
1203                         working->permissions &= DEFFILEMODE;
1204                 }
1205
1206                 q = parse = missing_field(sob(parse + 1), errline);
1207                 parse = son(parse);
1208                 if (!*parse)
1209                         badline("malformed line (missing fields):\n%s",
1210                             errline);
1211                 *parse = '\0';
1212                 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1213                         badline("error in config file; bad value for count of logs to save:\n%s",
1214                             errline);
1215
1216                 q = parse = missing_field(sob(parse + 1), errline);
1217                 parse = son(parse);
1218                 if (!*parse)
1219                         badline("malformed line (missing fields):\n%s",
1220                             errline);
1221                 *parse = '\0';
1222                 if (isdigitch(*q))
1223                         working->trsize = atoi(q);
1224                 else if (strcmp(q, "*") == 0)
1225                         working->trsize = -1;
1226                 else {
1227                         warnx("Invalid value of '%s' for 'size' in line:\n%s",
1228                             q, errline);
1229                         working->trsize = -1;
1230                 }
1231
1232                 working->flags = 0;
1233                 working->compress = COMPRESS_NONE;
1234                 q = parse = missing_field(sob(parse + 1), errline);
1235                 parse = son(parse);
1236                 eol = !*parse;
1237                 *parse = '\0';
1238                 {
1239                         char *ep;
1240                         u_long ul;
1241
1242                         ul = strtoul(q, &ep, 10);
1243                         if (ep == q)
1244                                 working->hours = 0;
1245                         else if (*ep == '*')
1246                                 working->hours = -1;
1247                         else if (ul > INT_MAX)
1248                                 badline("interval is too large:\n%s", errline);
1249                         else
1250                                 working->hours = ul;
1251
1252                         if (*ep == '\0' || strcmp(ep, "*") == 0)
1253                                 goto no_trimat;
1254                         if (*ep != '@' && *ep != '$')
1255                                 badline("malformed interval/at:\n%s", errline);
1256
1257                         working->flags |= CE_TRIMAT;
1258                         working->trim_at = ptime_init(NULL);
1259                         ptm_opts = PTM_PARSE_ISO8601;
1260                         if (*ep == '$')
1261                                 ptm_opts = PTM_PARSE_DWM;
1262                         ptm_opts |= PTM_PARSE_MATCHDOM;
1263                         res = ptime_relparse(working->trim_at, ptm_opts,
1264                             ptimeget_secs(timenow), ep + 1);
1265                         if (res == -2)
1266                                 badline("nonexistent time for 'at' value:\n%s",
1267                                     errline);
1268                         else if (res < 0)
1269                                 badline("malformed 'at' value:\n%s", errline);
1270                 }
1271 no_trimat:
1272
1273                 if (eol)
1274                         q = NULL;
1275                 else {
1276                         q = parse = sob(parse + 1);     /* Optional field */
1277                         parse = son(parse);
1278                         if (!*parse)
1279                                 eol = 1;
1280                         *parse = '\0';
1281                 }
1282
1283                 for (; q && *q && !isspacech(*q); q++) {
1284                         switch (tolowerch(*q)) {
1285                         case 'b':
1286                                 working->flags |= CE_BINARY;
1287                                 break;
1288                         case 'c':
1289                                 working->flags |= CE_CREATE;
1290                                 break;
1291                         case 'd':
1292                                 working->flags |= CE_NODUMP;
1293                                 break;
1294                         case 'g':
1295                                 working->flags |= CE_GLOB;
1296                                 break;
1297                         case 'j':
1298                                 working->compress = COMPRESS_BZIP2;
1299                                 break;
1300                         case 'n':
1301                                 working->flags |= CE_NOSIGNAL;
1302                                 break;
1303                         case 'p':
1304                                 working->flags |= CE_PLAIN0;
1305                                 break;
1306                         case 'r':
1307                                 working->flags |= CE_PID2CMD;
1308                                 break;
1309                         case 't':
1310                                 working->flags |= CE_RFC5424;
1311                                 break;
1312                         case 'u':
1313                                 working->flags |= CE_SIGNALGROUP;
1314                                 break;
1315                         case 'w':
1316                                 /* Deprecated flag - keep for compatibility purposes */
1317                                 break;
1318                         case 'x':
1319                                 working->compress = COMPRESS_XZ;
1320                                 break;
1321                         case 'y':
1322                                 working->compress = COMPRESS_ZSTD;
1323                                 break;
1324                         case 'z':
1325                                 working->compress = COMPRESS_GZIP;
1326                                 break;
1327                         case '-':
1328                                 break;
1329                         case 'f':       /* Used by OpenBSD for "CE_FOLLOW" */
1330                         case 'm':       /* Used by OpenBSD for "CE_MONITOR" */
1331                         default:
1332                                 badline("illegal flag in config file -- %c",
1333                                     *q);
1334                         }
1335                 }
1336
1337                 if (eol)
1338                         q = NULL;
1339                 else {
1340                         q = parse = sob(parse + 1);     /* Optional field */
1341                         parse = son(parse);
1342                         if (!*parse)
1343                                 eol = 1;
1344                         *parse = '\0';
1345                 }
1346
1347                 working->pid_cmd_file = NULL;
1348                 if (q && *q) {
1349                         if (*q == '/')
1350                                 working->pid_cmd_file = strdup(q);
1351                         else if (isalnum(*q))
1352                                 goto got_sig;
1353                         else {
1354                                 badline(
1355                         "illegal pid file or signal in config file:\n%s",
1356                                     errline);
1357                         }
1358                 }
1359                 if (eol)
1360                         q = NULL;
1361                 else {
1362                         q = parse = sob(parse + 1);     /* Optional field */
1363                         parse = son(parse);
1364                         *parse = '\0';
1365                 }
1366
1367                 working->sig = SIGHUP;
1368                 if (q && *q) {
1369 got_sig:
1370                         working->sig = parse_signal(q);
1371                         if (working->sig < 1 || working->sig >= sys_nsig) {
1372                                 badline(
1373                                     "illegal signal in config file:\n%s",
1374                                     errline);
1375                         }
1376                 }
1377
1378                 /*
1379                  * Finish figuring out what pid-file to use (if any) in
1380                  * later processing if this logfile needs to be rotated.
1381                  */
1382                 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1383                         /*
1384                          * This config-entry specified 'n' for nosignal,
1385                          * see if it also specified an explicit pid_cmd_file.
1386                          * This would be a pretty pointless combination.
1387                          */
1388                         if (working->pid_cmd_file != NULL) {
1389                                 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1390                                     working->pid_cmd_file, errline);
1391                                 free(working->pid_cmd_file);
1392                                 working->pid_cmd_file = NULL;
1393                         }
1394                 } else if (working->pid_cmd_file == NULL) {
1395                         /*
1396                          * This entry did not specify the 'n' flag, which
1397                          * means it should signal syslogd unless it had
1398                          * specified some other pid-file (and obviously the
1399                          * syslog pid-file will not be for a process-group).
1400                          * Also, we should only try to notify syslog if we
1401                          * are root.
1402                          */
1403                         if (working->flags & CE_SIGNALGROUP) {
1404                                 warnx("Ignoring flag 'U' in line:\n%s",
1405                                     errline);
1406                                 working->flags &= ~CE_SIGNALGROUP;
1407                         }
1408                         if (needroot)
1409                                 working->pid_cmd_file = strdup(path_syslogpid);
1410                 }
1411
1412                 /*
1413                  * Add this entry to the appropriate list of entries, unless
1414                  * it was some kind of special entry (eg: <default>).
1415                  */
1416                 if (special) {
1417                         ;                       /* Do not add to any list */
1418                 } else if (working->flags & CE_GLOB) {
1419                         STAILQ_INSERT_TAIL(glob_p, working, cf_nextp);
1420                 } else {
1421                         STAILQ_INSERT_TAIL(work_p, working, cf_nextp);
1422                 }
1423                 continue;
1424 cleanup:
1425                 free_entry(working);
1426 #undef badline
1427         } /* while (fgets(line, BUFSIZ, cf)) */
1428         if (errline != NULL)
1429                 free(errline);
1430 }
1431
1432 static char *
1433 missing_field(char *p, char *errline)
1434 {
1435
1436         if (!p || !*p)
1437                 errx(1, "missing field in config file:\n%s", errline);
1438         return (p);
1439 }
1440
1441 /*
1442  * In our sort we return it in the reverse of what qsort normally
1443  * would do, as we want the newest files first.  If we have two
1444  * entries with the same time we don't really care about order.
1445  *
1446  * Support function for qsort() in delete_oldest_timelog().
1447  */
1448 static int
1449 oldlog_entry_compare(const void *a, const void *b)
1450 {
1451         const struct oldlog_entry *ola = a, *olb = b;
1452
1453         if (ola->t > olb->t)
1454                 return (-1);
1455         else if (ola->t < olb->t)
1456                 return (1);
1457         else
1458                 return (0);
1459 }
1460
1461 /*
1462  * Check whether the file corresponding to dp is an archive of the logfile
1463  * logfname, based on the timefnamefmt format string. Return true and fill out
1464  * tm if this is the case; otherwise return false.
1465  */
1466 static int
1467 validate_old_timelog(int fd, const struct dirent *dp, const char *logfname,
1468     struct tm *tm)
1469 {
1470         struct stat sb;
1471         size_t logfname_len;
1472         char *s;
1473         int c;
1474
1475         logfname_len = strlen(logfname);
1476
1477         if (dp->d_type != DT_REG) {
1478                 /*
1479                  * Some filesystems (e.g. NFS) don't fill out the d_type field
1480                  * and leave it set to DT_UNKNOWN; in this case we must obtain
1481                  * the file type ourselves.
1482                  */
1483                 if (dp->d_type != DT_UNKNOWN ||
1484                     fstatat(fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) != 0 ||
1485                     !S_ISREG(sb.st_mode))
1486                         return (0);
1487         }
1488         /* Ignore everything but files with our logfile prefix. */
1489         if (strncmp(dp->d_name, logfname, logfname_len) != 0)
1490                 return (0);
1491         /* Ignore the actual non-rotated logfile. */
1492         if (dp->d_namlen == logfname_len)
1493                 return (0);
1494
1495         /*
1496          * Make sure we created have found a logfile, so the
1497          * postfix is valid, IE format is: '.<time>(.[bgx]z)?'.
1498          */
1499         if (dp->d_name[logfname_len] != '.') {
1500                 if (verbose)
1501                         printf("Ignoring %s which has unexpected "
1502                             "extension '%s'\n", dp->d_name,
1503                             &dp->d_name[logfname_len]);
1504                 return (0);
1505         }
1506         memset(tm, 0, sizeof(*tm));
1507         if ((s = strptime(&dp->d_name[logfname_len + 1],
1508             timefnamefmt, tm)) == NULL) {
1509                 /*
1510                  * We could special case "old" sequentially named logfiles here,
1511                  * but we do not as that would require special handling to
1512                  * decide which one was the oldest compared to "new" time based
1513                  * logfiles.
1514                  */
1515                 if (verbose)
1516                         printf("Ignoring %s which does not "
1517                             "match time format\n", dp->d_name);
1518                 return (0);
1519         }
1520
1521         for (c = 0; c < COMPRESS_TYPES; c++)
1522                 if (strcmp(s, compress_type[c].suffix) == 0)
1523                         /* We're done. */
1524                         return (1);
1525
1526         if (verbose)
1527                 printf("Ignoring %s which has unexpected extension '%s'\n",
1528                     dp->d_name, s);
1529
1530         return (0);
1531 }
1532
1533 /*
1534  * Delete the oldest logfiles, when using time based filenames.
1535  */
1536 static void
1537 delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
1538 {
1539         char *basebuf, *dirbuf, errbuf[80];
1540         const char *base, *dir;
1541         int dir_fd, i, logcnt, max_logcnt;
1542         struct oldlog_entry *oldlogs;
1543         struct dirent *dp;
1544         struct tm tm;
1545         DIR *dirp;
1546
1547         oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry));
1548         max_logcnt = MAX_OLDLOGS;
1549         logcnt = 0;
1550
1551         if (archive_dir != NULL && archive_dir[0] != '\0') {
1552                 dirbuf = NULL;
1553                 dir = archive_dir;
1554         } else {
1555                 if ((dirbuf = strdup(ent->log)) == NULL)
1556                         err(1, "strdup()");
1557                 dir = dirname(dirbuf);
1558         }
1559
1560         if ((basebuf = strdup(ent->log)) == NULL)
1561                 err(1, "strdup()");
1562         base = basename(basebuf);
1563         if (strcmp(base, "/") == 0)
1564                 errx(1, "Invalid log filename - became '/'");
1565
1566         if (verbose > 2)
1567                 printf("Searching for old logs in %s\n", dir);
1568
1569         /* First we create a 'list' of all archived logfiles */
1570         if ((dirp = opendir(dir)) == NULL)
1571                 err(1, "Cannot open log directory '%s'", dir);
1572         dir_fd = dirfd(dirp);
1573         while ((dp = readdir(dirp)) != NULL) {
1574                 if (validate_old_timelog(dir_fd, dp, base, &tm) == 0)
1575                         continue;
1576
1577                 /*
1578                  * We should now have old an old rotated logfile, so
1579                  * add it to the 'list'.
1580                  */
1581                 if ((oldlogs[logcnt].t = timegm(&tm)) == -1)
1582                         err(1, "Could not convert time string to time value");
1583                 if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL)
1584                         err(1, "strdup()");
1585                 logcnt++;
1586
1587                 /*
1588                  * It is very unlikely we ever run out of space in the
1589                  * logfile array from the default size, but lets
1590                  * handle it anyway...
1591                  */
1592                 if (logcnt >= max_logcnt) {
1593                         max_logcnt *= 4;
1594                         /* Detect integer overflow */
1595                         if (max_logcnt < logcnt)
1596                                 errx(1, "Too many old logfiles found");
1597                         oldlogs = realloc(oldlogs,
1598                             max_logcnt * sizeof(struct oldlog_entry));
1599                         if (oldlogs == NULL)
1600                                 err(1, "realloc()");
1601                 }
1602         }
1603
1604         /* Second, if needed we delete oldest archived logfiles */
1605         if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) {
1606                 oldlogs = realloc(oldlogs, logcnt *
1607                     sizeof(struct oldlog_entry));
1608                 if (oldlogs == NULL)
1609                         err(1, "realloc()");
1610
1611                 /*
1612                  * We now sort the logs in the order of newest to
1613                  * oldest.  That way we can simply skip over the
1614                  * number of records we want to keep.
1615                  */
1616                 qsort(oldlogs, logcnt, sizeof(struct oldlog_entry),
1617                     oldlog_entry_compare);
1618                 for (i = ent->numlogs - 1; i < logcnt; i++) {
1619                         if (noaction)
1620                                 printf("\trm -f %s/%s\n", dir,
1621                                     oldlogs[i].fname);
1622                         else if (unlinkat(dir_fd, oldlogs[i].fname, 0) != 0) {
1623                                 snprintf(errbuf, sizeof(errbuf),
1624                                     "Could not delete old logfile '%s'",
1625                                     oldlogs[i].fname);
1626                                 perror(errbuf);
1627                         }
1628                 }
1629         } else if (verbose > 1)
1630                 printf("No old logs to delete for logfile %s\n", ent->log);
1631
1632         /* Third, cleanup */
1633         closedir(dirp);
1634         for (i = 0; i < logcnt; i++) {
1635                 assert(oldlogs[i].fname != NULL);
1636                 free(oldlogs[i].fname);
1637         }
1638         free(oldlogs);
1639         free(dirbuf);
1640         free(basebuf);
1641 }
1642
1643 /*
1644  * Generate a log filename, when using classic filenames.
1645  */
1646 static void
1647 gen_classiclog_fname(char *fname, size_t fname_sz, const char *archive_dir,
1648     const char *namepart, int numlogs_c)
1649 {
1650
1651         if (archive_dir[0] != '\0')
1652                 (void) snprintf(fname, fname_sz, "%s/%s.%d", archive_dir,
1653                     namepart, numlogs_c);
1654         else
1655                 (void) snprintf(fname, fname_sz, "%s.%d", namepart, numlogs_c);
1656 }
1657
1658 /*
1659  * Delete a rotated logfile, when using classic filenames.
1660  */
1661 static void
1662 delete_classiclog(const char *archive_dir, const char *namepart, int numlog_c)
1663 {
1664         char file1[MAXPATHLEN], zfile1[MAXPATHLEN];
1665         int c;
1666
1667         gen_classiclog_fname(file1, sizeof(file1), archive_dir, namepart,
1668             numlog_c);
1669
1670         for (c = 0; c < COMPRESS_TYPES; c++) {
1671                 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1672                     compress_type[c].suffix);
1673                 if (noaction)
1674                         printf("\trm -f %s\n", zfile1);
1675                 else
1676                         (void) unlink(zfile1);
1677         }
1678 }
1679
1680 /*
1681  * Only add to the queue if the file hasn't already been added. This is
1682  * done to prevent circular include loops.
1683  */
1684 static void
1685 add_to_queue(const char *fname, struct ilist *inclist)
1686 {
1687         struct include_entry *inc;
1688
1689         STAILQ_FOREACH(inc, inclist, inc_nextp) {
1690                 if (strcmp(fname, inc->file) == 0) {
1691                         warnx("duplicate include detected: %s", fname);
1692                         return;
1693                 }
1694         }
1695
1696         inc = malloc(sizeof(struct include_entry));
1697         if (inc == NULL)
1698                 err(1, "malloc of inc");
1699         inc->file = strdup(fname);
1700
1701         if (verbose > 2)
1702                 printf("\t+ Adding %s to the processing queue.\n", fname);
1703
1704         STAILQ_INSERT_TAIL(inclist, inc, inc_nextp);
1705 }
1706
1707 /*
1708  * Search for logfile and return its compression suffix (if supported)
1709  * The suffix detection is first-match in the order of compress_types
1710  *
1711  * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE)
1712  * a zero-length string is returned
1713  */
1714 static const char *
1715 get_logfile_suffix(const char *logfile)
1716 {
1717         struct stat st;
1718         char zfile[MAXPATHLEN];
1719         int c;
1720
1721         for (c = 0; c < COMPRESS_TYPES; c++) {
1722                 (void) strlcpy(zfile, logfile, MAXPATHLEN);
1723                 (void) strlcat(zfile, compress_type[c].suffix, MAXPATHLEN);
1724                 if (lstat(zfile, &st) == 0)
1725                         return (compress_type[c].suffix);
1726         }
1727         return (NULL);
1728 }
1729
1730 static fk_entry
1731 do_rotate(const struct conf_entry *ent)
1732 {
1733         char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1734         char file1[MAXPATHLEN], file2[MAXPATHLEN];
1735         char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1736         const char *logfile_suffix;
1737         char datetimestr[30];
1738         int flags, numlogs_c;
1739         fk_entry free_or_keep;
1740         struct sigwork_entry *swork;
1741         struct stat st;
1742         struct tm tm;
1743         time_t now;
1744
1745         flags = ent->flags;
1746         free_or_keep = FREE_ENT;
1747
1748         if (archtodir) {
1749                 char *p;
1750
1751                 /* build complete name of archive directory into dirpart */
1752                 if (*archdirname == '/') {      /* absolute */
1753                         strlcpy(dirpart, archdirname, sizeof(dirpart));
1754                 } else {        /* relative */
1755                         /* get directory part of logfile */
1756                         strlcpy(dirpart, ent->log, sizeof(dirpart));
1757                         if ((p = strrchr(dirpart, '/')) == NULL)
1758                                 dirpart[0] = '\0';
1759                         else
1760                                 *(p + 1) = '\0';
1761                         strlcat(dirpart, archdirname, sizeof(dirpart));
1762                 }
1763
1764                 /* check if archive directory exists, if not, create it */
1765                 if (lstat(dirpart, &st))
1766                         createdir(ent, dirpart);
1767
1768                 /* get filename part of logfile */
1769                 if ((p = strrchr(ent->log, '/')) == NULL)
1770                         strlcpy(namepart, ent->log, sizeof(namepart));
1771                 else
1772                         strlcpy(namepart, p + 1, sizeof(namepart));
1773         } else {
1774                 /*
1775                  * Tell utility functions we are not using an archive
1776                  * dir.
1777                  */
1778                 dirpart[0] = '\0';
1779                 strlcpy(namepart, ent->log, sizeof(namepart));
1780         }
1781
1782         /* Delete old logs */
1783         if (timefnamefmt != NULL)
1784                 delete_oldest_timelog(ent, dirpart);
1785         else {
1786                 /*
1787                  * Handle cleaning up after legacy newsyslog where we
1788                  * kept ent->numlogs + 1 files.  This code can go away
1789                  * at some point in the future.
1790                  */
1791                 delete_classiclog(dirpart, namepart, ent->numlogs);
1792
1793                 if (ent->numlogs > 0)
1794                         delete_classiclog(dirpart, namepart, ent->numlogs - 1);
1795
1796         }
1797
1798         if (timefnamefmt != NULL) {
1799                 /* If time functions fails we can't really do any sensible */
1800                 if (time(&now) == (time_t)-1 ||
1801                     localtime_r(&now, &tm) == NULL)
1802                         bzero(&tm, sizeof(tm));
1803
1804                 strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm);
1805                 if (archtodir)
1806                         (void) snprintf(file1, sizeof(file1), "%s/%s.%s",
1807                             dirpart, namepart, datetimestr);
1808                 else
1809                         (void) snprintf(file1, sizeof(file1), "%s.%s",
1810                             ent->log, datetimestr);
1811
1812                 /* Don't run the code to move down logs */
1813                 numlogs_c = -1;
1814         } else {
1815                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1816                     ent->numlogs - 1);
1817                 numlogs_c = ent->numlogs - 2;           /* copy for countdown */
1818         }
1819
1820         /* Move down log files */
1821         for (; numlogs_c >= 0; numlogs_c--) {
1822                 (void) strlcpy(file2, file1, sizeof(file2));
1823
1824                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1825                     numlogs_c);
1826
1827                 logfile_suffix = get_logfile_suffix(file1);
1828                 if (logfile_suffix == NULL)
1829                         continue;
1830                 (void) strlcpy(zfile1, file1, MAXPATHLEN);
1831                 (void) strlcpy(zfile2, file2, MAXPATHLEN);
1832                 (void) strlcat(zfile1, logfile_suffix, MAXPATHLEN);
1833                 (void) strlcat(zfile2, logfile_suffix, MAXPATHLEN);
1834
1835                 if (noaction)
1836                         printf("\tmv %s %s\n", zfile1, zfile2);
1837                 else {
1838                         /* XXX - Ought to be checking for failure! */
1839                         (void)rename(zfile1, zfile2);
1840                 }
1841                 change_attrs(zfile2, ent);
1842                 if (ent->compress && strlen(logfile_suffix) == 0) {
1843                         /* compress old rotation */
1844                         struct zipwork_entry *zwork;
1845                         size_t sz;
1846
1847                         sz = sizeof(*zwork) + strlen(zfile2) + 1;
1848                         zwork = calloc(1, sz);
1849                         if (zwork == NULL)
1850                                 err(1, "calloc");
1851
1852                         zwork->zw_conf = ent;
1853                         zwork->zw_fsize = sizefile(zfile2);
1854                         strcpy(zwork->zw_fname, zfile2);
1855                         do_zipwork(zwork);
1856                         free(zwork);
1857                 }
1858         }
1859
1860         if (ent->numlogs > 0) {
1861                 if (noaction) {
1862                         /*
1863                          * Note that savelog() may succeed with using link()
1864                          * for the archtodir case, but there is no good way
1865                          * of knowing if it will when doing "noaction", so
1866                          * here we claim that it will have to do a copy...
1867                          */
1868                         if (archtodir)
1869                                 printf("\tcp %s %s\n", ent->log, file1);
1870                         else
1871                                 printf("\tln %s %s\n", ent->log, file1);
1872                         printf("\ttouch %s\t\t"
1873                             "# Update mtime for 'when'-interval processing\n",
1874                             file1);
1875                 } else {
1876                         if (!(flags & CE_BINARY)) {
1877                                 /* Report the trimming to the old log */
1878                                 log_trim(ent->log, ent);
1879                         }
1880                         savelog(ent->log, file1);
1881                         /*
1882                          * Interval-based rotations are done using the mtime of
1883                          * the most recently archived log, so make sure it gets
1884                          * updated during a rotation.
1885                          */
1886                         utimes(file1, NULL);
1887                 }
1888                 change_attrs(file1, ent);
1889         }
1890
1891         /* Create the new log file and move it into place */
1892         if (noaction)
1893                 printf("Start new log...\n");
1894         createlog(ent);
1895
1896         /*
1897          * Save all signalling and file-compression to be done after log
1898          * files from all entries have been rotated.  This way any one
1899          * process will not be sent the same signal multiple times when
1900          * multiple log files had to be rotated.
1901          */
1902         swork = NULL;
1903         if (ent->pid_cmd_file != NULL)
1904                 swork = save_sigwork(ent);
1905         if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) {
1906                 if (!(ent->flags & CE_PLAIN0) ||
1907                     strcmp(&file1[strlen(file1) - 2], ".0") != 0) {
1908                         /*
1909                          * The zipwork_entry will include a pointer to this
1910                          * conf_entry, so the conf_entry should not be freed.
1911                          */
1912                         free_or_keep = KEEP_ENT;
1913                         save_zipwork(ent, swork, ent->fsize, file1);
1914                 }
1915         }
1916
1917         return (free_or_keep);
1918 }
1919
1920 static void
1921 do_sigwork(struct sigwork_entry *swork)
1922 {
1923         struct sigwork_entry *nextsig;
1924         int kres, secs;
1925         char *tmp;
1926
1927         if (swork->sw_runcmd == 0 && (!(swork->sw_pidok) || swork->sw_pid == 0))
1928                 return;                 /* no work to do... */
1929
1930         /*
1931          * If nosignal (-s) was specified, then do not signal any process.
1932          * Note that a nosignal request triggers a warning message if the
1933          * rotated logfile needs to be compressed, *unless* -R was also
1934          * specified.  We assume that an `-sR' request came from a process
1935          * which writes to the logfile, and as such, we assume that process
1936          * has already made sure the logfile is not presently in use.  This
1937          * just sets swork->sw_pidok to a special value, and do_zipwork
1938          * will print any necessary warning(s).
1939          */
1940         if (nosignal) {
1941                 if (!rotatereq)
1942                         swork->sw_pidok = -1;
1943                 return;
1944         }
1945
1946         /*
1947          * Compute the pause between consecutive signals.  Use a longer
1948          * sleep time if we will be sending two signals to the same
1949          * daemon or process-group.
1950          */
1951         secs = 0;
1952         nextsig = SLIST_NEXT(swork, sw_nextp);
1953         if (nextsig != NULL) {
1954                 if (swork->sw_pid == nextsig->sw_pid)
1955                         secs = 10;
1956                 else
1957                         secs = 1;
1958         }
1959
1960         if (noaction) {
1961                 if (swork->sw_runcmd)
1962                         printf("\tsh -c '%s %d'\n", swork->sw_fname,
1963                             swork->sw_signum);
1964                 else {
1965                         printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1966                             (int)swork->sw_pid, swork->sw_fname);
1967                         if (secs > 0)
1968                                 printf("\tsleep %d\n", secs);
1969                 }
1970                 return;
1971         }
1972
1973         if (swork->sw_runcmd) {
1974                 asprintf(&tmp, "%s %d", swork->sw_fname, swork->sw_signum);
1975                 if (tmp == NULL) {
1976                         warn("can't allocate memory to run %s",
1977                             swork->sw_fname);
1978                         return;
1979                 }
1980                 if (verbose)
1981                         printf("Run command: %s\n", tmp);
1982                 kres = system(tmp);
1983                 if (kres) {
1984                         warnx("%s: returned non-zero exit code: %d",
1985                             tmp, kres);
1986                 }
1987                 free(tmp);
1988                 return;
1989         }
1990
1991         kres = kill(swork->sw_pid, swork->sw_signum);
1992         if (kres != 0) {
1993                 /*
1994                  * Assume that "no such process" (ESRCH) is something
1995                  * to warn about, but is not an error.  Presumably the
1996                  * process which writes to the rotated log file(s) is
1997                  * gone, in which case we should have no problem with
1998                  * compressing the rotated log file(s).
1999                  */
2000                 if (errno != ESRCH)
2001                         swork->sw_pidok = 0;
2002                 warn("can't notify %s, pid %d = %s", swork->sw_pidtype,
2003                     (int)swork->sw_pid, swork->sw_fname);
2004         } else {
2005                 if (verbose)
2006                         printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
2007                             (int)swork->sw_pid, swork->sw_fname);
2008                 if (secs > 0) {
2009                         if (verbose)
2010                                 printf("Pause %d second(s) between signals\n",
2011                                     secs);
2012                         sleep(secs);
2013                 }
2014         }
2015 }
2016
2017 static void
2018 do_zipwork(struct zipwork_entry *zwork)
2019 {
2020         const struct compress_types *ct;
2021         struct sbuf *command;
2022         pid_t pidzip, wpid;
2023         int c, errsav, fcount, zstatus;
2024         const char **args, *pgm_name, *pgm_path;
2025         char *zresult;
2026
2027         assert(zwork != NULL);
2028         assert(zwork->zw_conf != NULL);
2029         assert(zwork->zw_conf->compress > COMPRESS_NONE);
2030         assert(zwork->zw_conf->compress < COMPRESS_TYPES);
2031
2032         if (zwork->zw_swork != NULL && zwork->zw_swork->sw_runcmd == 0 &&
2033             zwork->zw_swork->sw_pidok <= 0) {
2034                 warnx(
2035                     "log %s not compressed because daemon(s) not notified",
2036                     zwork->zw_fname);
2037                 change_attrs(zwork->zw_fname, zwork->zw_conf);
2038                 return;
2039         }
2040
2041         ct = &compress_type[zwork->zw_conf->compress];
2042
2043         /*
2044          * execv will be called with the array [ program, flags ... ,
2045          * filename, NULL ] so allocate nflags+3 elements for the array.
2046          */
2047         args = calloc(ct->nflags + 3, sizeof(*args));
2048         if (args == NULL)
2049                 err(1, "calloc");
2050
2051         pgm_path = ct->path;
2052         pgm_name = strrchr(pgm_path, '/');
2053         if (pgm_name == NULL)
2054                 pgm_name = pgm_path;
2055         else
2056                 pgm_name++;
2057
2058         /* Build the argument array. */
2059         args[0] = pgm_name;
2060         for (c = 0; c < ct->nflags; c++)
2061                 args[c + 1] = ct->flags[c];
2062         args[c + 1] = zwork->zw_fname;
2063
2064         /* Also create a space-delimited version if we need to print it. */
2065         if ((command = sbuf_new_auto()) == NULL)
2066                 errx(1, "sbuf_new");
2067         sbuf_cpy(command, pgm_path);
2068         for (c = 1; args[c] != NULL; c++) {
2069                 sbuf_putc(command, ' ');
2070                 sbuf_cat(command, args[c]);
2071         }
2072         if (sbuf_finish(command) == -1)
2073                 err(1, "sbuf_finish");
2074
2075         /* Determine the filename of the compressed file. */
2076         asprintf(&zresult, "%s%s", zwork->zw_fname, ct->suffix);
2077         if (zresult == NULL)
2078                 errx(1, "asprintf");
2079
2080         if (verbose)
2081                 printf("Executing: %s\n", sbuf_data(command));
2082
2083         if (noaction) {
2084                 printf("\t%s %s\n", pgm_name, zwork->zw_fname);
2085                 change_attrs(zresult, zwork->zw_conf);
2086                 goto out;
2087         }
2088
2089         fcount = 1;
2090         pidzip = fork();
2091         while (pidzip < 0) {
2092                 /*
2093                  * The fork failed.  If the failure was due to a temporary
2094                  * problem, then wait a short time and try it again.
2095                  */
2096                 errsav = errno;
2097                 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname);
2098                 if (errsav != EAGAIN || fcount > 5)
2099                         errx(1, "Exiting...");
2100                 sleep(fcount * 12);
2101                 fcount++;
2102                 pidzip = fork();
2103         }
2104         if (!pidzip) {
2105                 /* The child process executes the compression command */
2106                 execv(pgm_path, __DECONST(char *const*, args));
2107                 err(1, "execv(`%s')", sbuf_data(command));
2108         }
2109
2110         wpid = waitpid(pidzip, &zstatus, 0);
2111         if (wpid == -1) {
2112                 /* XXX - should this be a fatal error? */
2113                 warn("%s: waitpid(%d)", pgm_path, pidzip);
2114                 goto out;
2115         }
2116         if (!WIFEXITED(zstatus)) {
2117                 warnx("`%s' did not terminate normally", sbuf_data(command));
2118                 goto out;
2119         }
2120         if (WEXITSTATUS(zstatus)) {
2121                 warnx("`%s' terminated with a non-zero status (%d)",
2122                     sbuf_data(command), WEXITSTATUS(zstatus));
2123                 goto out;
2124         }
2125
2126         /* Compression was successful, set file attributes on the result. */
2127         change_attrs(zresult, zwork->zw_conf);
2128
2129 out:
2130         sbuf_delete(command);
2131         free(args);
2132         free(zresult);
2133 }
2134
2135 /*
2136  * Save information on any process we need to signal.  Any single
2137  * process may need to be sent different signal-values for different
2138  * log files, but usually a single signal-value will cause the process
2139  * to close and re-open all of its log files.
2140  */
2141 static struct sigwork_entry *
2142 save_sigwork(const struct conf_entry *ent)
2143 {
2144         struct sigwork_entry *sprev, *stmp;
2145         int ndiff;
2146         size_t tmpsiz;
2147
2148         sprev = NULL;
2149         ndiff = 1;
2150         SLIST_FOREACH(stmp, &swhead, sw_nextp) {
2151                 ndiff = strcmp(ent->pid_cmd_file, stmp->sw_fname);
2152                 if (ndiff > 0)
2153                         break;
2154                 if (ndiff == 0) {
2155                         if (ent->sig == stmp->sw_signum)
2156                                 break;
2157                         if (ent->sig > stmp->sw_signum) {
2158                                 ndiff = 1;
2159                                 break;
2160                         }
2161                 }
2162                 sprev = stmp;
2163         }
2164         if (stmp != NULL && ndiff == 0)
2165                 return (stmp);
2166
2167         tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_cmd_file) + 1;
2168         stmp = malloc(tmpsiz);
2169
2170         stmp->sw_runcmd = 0;
2171         /* If this is a command to run we just set the flag and run command */
2172         if (ent->flags & CE_PID2CMD) {
2173                 stmp->sw_pid = -1;
2174                 stmp->sw_pidok = 0;
2175                 stmp->sw_runcmd = 1;
2176         } else {
2177                 set_swpid(stmp, ent);
2178         }
2179         stmp->sw_signum = ent->sig;
2180         strcpy(stmp->sw_fname, ent->pid_cmd_file);
2181         if (sprev == NULL)
2182                 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
2183         else
2184                 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
2185         return (stmp);
2186 }
2187
2188 /*
2189  * Save information on any file we need to compress.  We may see the same
2190  * file multiple times, so check the full list to avoid duplicates.  The
2191  * list itself is sorted smallest-to-largest, because that's the order we
2192  * want to compress the files.  If the partition is very low on disk space,
2193  * then the smallest files are the most likely to compress, and compressing
2194  * them first will free up more space for the larger files.
2195  */
2196 static struct zipwork_entry *
2197 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
2198     int zsize, const char *zipfname)
2199 {
2200         struct zipwork_entry *zprev, *ztmp;
2201         int ndiff;
2202         size_t tmpsiz;
2203
2204         /* Compute the size if the caller did not know it. */
2205         if (zsize < 0)
2206                 zsize = sizefile(zipfname);
2207
2208         zprev = NULL;
2209         ndiff = 1;
2210         SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
2211                 ndiff = strcmp(zipfname, ztmp->zw_fname);
2212                 if (ndiff == 0)
2213                         break;
2214                 if (zsize > ztmp->zw_fsize)
2215                         zprev = ztmp;
2216         }
2217         if (ztmp != NULL && ndiff == 0)
2218                 return (ztmp);
2219
2220         tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
2221         ztmp = malloc(tmpsiz);
2222         ztmp->zw_conf = ent;
2223         ztmp->zw_swork = swork;
2224         ztmp->zw_fsize = zsize;
2225         strcpy(ztmp->zw_fname, zipfname);
2226         if (zprev == NULL)
2227                 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
2228         else
2229                 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
2230         return (ztmp);
2231 }
2232
2233 /* Send a signal to the pid specified by pidfile */
2234 static void
2235 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
2236 {
2237         FILE *f;
2238         long minok, maxok, rval;
2239         char *endp, *linep, line[BUFSIZ];
2240
2241         minok = MIN_PID;
2242         maxok = MAX_PID;
2243         swork->sw_pidok = 0;
2244         swork->sw_pid = 0;
2245         swork->sw_pidtype = "daemon";
2246         if (ent->flags & CE_SIGNALGROUP) {
2247                 /*
2248                  * If we are expected to signal a process-group when
2249                  * rotating this logfile, then the value read in should
2250                  * be the negative of a valid process ID.
2251                  */
2252                 minok = -MAX_PID;
2253                 maxok = -MIN_PID;
2254                 swork->sw_pidtype = "process-group";
2255         }
2256
2257         f = fopen(ent->pid_cmd_file, "r");
2258         if (f == NULL) {
2259                 if (errno == ENOENT && enforcepid == 0) {
2260                         /*
2261                          * Warn if the PID file doesn't exist, but do
2262                          * not consider it an error.  Most likely it
2263                          * means the process has been terminated,
2264                          * so it should be safe to rotate any log
2265                          * files that the process would have been using.
2266                          */
2267                         swork->sw_pidok = 1;
2268                         warnx("pid file doesn't exist: %s", ent->pid_cmd_file);
2269                 } else
2270                         warn("can't open pid file: %s", ent->pid_cmd_file);
2271                 return;
2272         }
2273
2274         if (fgets(line, BUFSIZ, f) == NULL) {
2275                 /*
2276                  * Warn if the PID file is empty, but do not consider
2277                  * it an error.  Most likely it means the process has
2278                  * has terminated, so it should be safe to rotate any
2279                  * log files that the process would have been using.
2280                  */
2281                 if (feof(f) && enforcepid == 0) {
2282                         swork->sw_pidok = 1;
2283                         warnx("pid/cmd file is empty: %s", ent->pid_cmd_file);
2284                 } else
2285                         warn("can't read from pid file: %s", ent->pid_cmd_file);
2286                 (void)fclose(f);
2287                 return;
2288         }
2289         (void)fclose(f);
2290
2291         errno = 0;
2292         linep = line;
2293         while (*linep == ' ')
2294                 linep++;
2295         rval = strtol(linep, &endp, 10);
2296         if (*endp != '\0' && !isspacech(*endp)) {
2297                 warnx("pid file does not start with a valid number: %s",
2298                     ent->pid_cmd_file);
2299         } else if (rval < minok || rval > maxok) {
2300                 warnx("bad value '%ld' for process number in %s",
2301                     rval, ent->pid_cmd_file);
2302                 if (verbose)
2303                         warnx("\t(expecting value between %ld and %ld)",
2304                             minok, maxok);
2305         } else {
2306                 swork->sw_pidok = 1;
2307                 swork->sw_pid = rval;
2308         }
2309
2310         return;
2311 }
2312
2313 /* Log the fact that the logs were turned over */
2314 static int
2315 log_trim(const char *logname, const struct conf_entry *log_ent)
2316 {
2317         FILE *f;
2318         const char *xtra;
2319
2320         if ((f = fopen(logname, "a")) == NULL)
2321                 return (-1);
2322         xtra = "";
2323         if (log_ent->def_cfg)
2324                 xtra = " using <default> rule";
2325         if (log_ent->flags & CE_RFC5424) {
2326                 if (log_ent->firstcreate) {
2327                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s\n",
2328                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2329                             daytime_rfc5424, hostname, getpid(),
2330                             "logfile first created", xtra);
2331                 } else if (log_ent->r_reason != NULL) {
2332                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s%s\n",
2333                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2334                             daytime_rfc5424, hostname, getpid(),
2335                             "logfile turned over", log_ent->r_reason, xtra);
2336                 } else {
2337                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s\n",
2338                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2339                             daytime_rfc5424, hostname, getpid(),
2340                             "logfile turned over", xtra);
2341                 }
2342         } else {
2343                 if (log_ent->firstcreate)
2344                         fprintf(f,
2345                             "%s %.*s newsyslog[%d]: logfile first created%s\n",
2346                             daytime, (int)hostname_shortlen, hostname, getpid(),
2347                             xtra);
2348                 else if (log_ent->r_reason != NULL)
2349                         fprintf(f,
2350                             "%s %.*s newsyslog[%d]: logfile turned over%s%s\n",
2351                             daytime, (int)hostname_shortlen, hostname, getpid(),
2352                             log_ent->r_reason, xtra);
2353                 else
2354                         fprintf(f,
2355                             "%s %.*s newsyslog[%d]: logfile turned over%s\n",
2356                             daytime, (int)hostname_shortlen, hostname, getpid(),
2357                             xtra);
2358         }
2359         if (fclose(f) == EOF)
2360                 err(1, "log_trim: fclose");
2361         return (0);
2362 }
2363
2364 /* Return size in kilobytes of a file */
2365 static int
2366 sizefile(const char *file)
2367 {
2368         struct stat sb;
2369
2370         if (stat(file, &sb) < 0)
2371                 return (-1);
2372         return (kbytes(sb.st_size));
2373 }
2374
2375 /*
2376  * Return the mtime of the most recent archive of the logfile, using timestamp
2377  * based filenames.
2378  */
2379 static time_t
2380 mtime_old_timelog(const char *file)
2381 {
2382         struct stat sb;
2383         struct tm tm;
2384         int dir_fd;
2385         time_t t;
2386         struct dirent *dp;
2387         DIR *dirp;
2388         char *logfname, *logfnamebuf, *dir, *dirbuf;
2389
2390         t = -1;
2391
2392         if ((dirbuf = strdup(file)) == NULL) {
2393                 warn("strdup() of '%s'", file);
2394                 return (t);
2395         }
2396         dir = dirname(dirbuf);
2397         if ((logfnamebuf = strdup(file)) == NULL) {
2398                 warn("strdup() of '%s'", file);
2399                 free(dirbuf);
2400                 return (t);
2401         }
2402         logfname = basename(logfnamebuf);
2403         if (logfname[0] == '/') {
2404                 warnx("Invalid log filename '%s'", logfname);
2405                 goto out;
2406         }
2407
2408         if ((dirp = opendir(dir)) == NULL) {
2409                 warn("Cannot open log directory '%s'", dir);
2410                 goto out;
2411         }
2412         dir_fd = dirfd(dirp);
2413         /* Open the archive dir and find the most recent archive of logfname. */
2414         while ((dp = readdir(dirp)) != NULL) {
2415                 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0)
2416                         continue;
2417
2418                 if (fstatat(dir_fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) == -1) {
2419                         warn("Cannot stat '%s'", file);
2420                         continue;
2421                 }
2422                 if (t < sb.st_mtime)
2423                         t = sb.st_mtime;
2424         }
2425         closedir(dirp);
2426
2427 out:
2428         free(dirbuf);
2429         free(logfnamebuf);
2430         return (t);
2431 }
2432
2433 /* Return the age in hours of the most recent archive of the logfile. */
2434 static int
2435 age_old_log(const char *file)
2436 {
2437         struct stat sb;
2438         const char *logfile_suffix;
2439         static unsigned int suffix_maxlen = 0;
2440         char *tmp;
2441         size_t tmpsiz;
2442         time_t mtime;
2443         int c;
2444
2445         if (suffix_maxlen == 0) {
2446                 for (c = 0; c < COMPRESS_TYPES; c++)
2447                         suffix_maxlen = MAX(suffix_maxlen,
2448                             strlen(compress_type[c].suffix));
2449         }
2450
2451         tmpsiz = MAXPATHLEN + sizeof(".0") + suffix_maxlen + 1;
2452         tmp = alloca(tmpsiz);
2453
2454         if (archtodir) {
2455                 char *p;
2456
2457                 /* build name of archive directory into tmp */
2458                 if (*archdirname == '/') {      /* absolute */
2459                         strlcpy(tmp, archdirname, tmpsiz);
2460                 } else {        /* relative */
2461                         /* get directory part of logfile */
2462                         strlcpy(tmp, file, tmpsiz);
2463                         if ((p = strrchr(tmp, '/')) == NULL)
2464                                 tmp[0] = '\0';
2465                         else
2466                                 *(p + 1) = '\0';
2467                         strlcat(tmp, archdirname, tmpsiz);
2468                 }
2469
2470                 strlcat(tmp, "/", tmpsiz);
2471
2472                 /* get filename part of logfile */
2473                 if ((p = strrchr(file, '/')) == NULL)
2474                         strlcat(tmp, file, tmpsiz);
2475                 else
2476                         strlcat(tmp, p + 1, tmpsiz);
2477         } else {
2478                 (void) strlcpy(tmp, file, tmpsiz);
2479         }
2480
2481         if (timefnamefmt != NULL) {
2482                 mtime = mtime_old_timelog(tmp);
2483                 if (mtime == -1)
2484                         return (-1);
2485         } else {
2486                 strlcat(tmp, ".0", tmpsiz);
2487                 logfile_suffix = get_logfile_suffix(tmp);
2488                 if (logfile_suffix == NULL)
2489                         return (-1);
2490                 (void) strlcat(tmp, logfile_suffix, tmpsiz);
2491                 if (stat(tmp, &sb) < 0)
2492                         return (-1);
2493                 mtime = sb.st_mtime;
2494         }
2495
2496         return ((int)(ptimeget_secs(timenow) - mtime + 1800) / 3600);
2497 }
2498
2499 /* Skip Over Blanks */
2500 static char *
2501 sob(char *p)
2502 {
2503         while (p && *p && isspace(*p))
2504                 p++;
2505         return (p);
2506 }
2507
2508 /* Skip Over Non-Blanks */
2509 static char *
2510 son(char *p)
2511 {
2512         while (p && *p && !isspace(*p))
2513                 p++;
2514         return (p);
2515 }
2516
2517 /* Check if string is actually a number */
2518 static int
2519 isnumberstr(const char *string)
2520 {
2521         while (*string) {
2522                 if (!isdigitch(*string++))
2523                         return (0);
2524         }
2525         return (1);
2526 }
2527
2528 /* Check if string contains a glob */
2529 static int
2530 isglobstr(const char *string)
2531 {
2532         char chr;
2533
2534         while ((chr = *string++)) {
2535                 if (chr == '*' || chr == '?' || chr == '[')
2536                         return (1);
2537         }
2538         return (0);
2539 }
2540
2541 /*
2542  * Save the active log file under a new name.  A link to the new name
2543  * is the quick-and-easy way to do this.  If that fails (which it will
2544  * if the destination is on another partition), then make a copy of
2545  * the file to the new location.
2546  */
2547 static void
2548 savelog(char *from, char *to)
2549 {
2550         FILE *src, *dst;
2551         int c, res;
2552
2553         res = link(from, to);
2554         if (res == 0)
2555                 return;
2556
2557         if ((src = fopen(from, "r")) == NULL)
2558                 err(1, "can't fopen %s for reading", from);
2559         if ((dst = fopen(to, "w")) == NULL)
2560                 err(1, "can't fopen %s for writing", to);
2561
2562         while ((c = getc(src)) != EOF) {
2563                 if ((putc(c, dst)) == EOF)
2564                         err(1, "error writing to %s", to);
2565         }
2566
2567         if (ferror(src))
2568                 err(1, "error reading from %s", from);
2569         if ((fclose(src)) != 0)
2570                 err(1, "can't fclose %s", to);
2571         if ((fclose(dst)) != 0)
2572                 err(1, "can't fclose %s", from);
2573 }
2574
2575 /* create one or more directory components of a path */
2576 static void
2577 createdir(const struct conf_entry *ent, char *dirpart)
2578 {
2579         int res;
2580         char *s, *d;
2581         char mkdirpath[MAXPATHLEN];
2582         struct stat st;
2583
2584         s = dirpart;
2585         d = mkdirpath;
2586
2587         for (;;) {
2588                 *d++ = *s++;
2589                 if (*s != '/' && *s != '\0')
2590                         continue;
2591                 *d = '\0';
2592                 res = lstat(mkdirpath, &st);
2593                 if (res != 0) {
2594                         if (noaction) {
2595                                 printf("\tmkdir %s\n", mkdirpath);
2596                         } else {
2597                                 res = mkdir(mkdirpath, 0755);
2598                                 if (res != 0)
2599                                         err(1, "Error on mkdir(\"%s\") for -a",
2600                                             mkdirpath);
2601                         }
2602                 }
2603                 if (*s == '\0')
2604                         break;
2605         }
2606         if (verbose) {
2607                 if (ent->firstcreate)
2608                         printf("Created directory '%s' for new %s\n",
2609                             dirpart, ent->log);
2610                 else
2611                         printf("Created directory '%s' for -a\n", dirpart);
2612         }
2613 }
2614
2615 /*
2616  * Create a new log file, destroying any currently-existing version
2617  * of the log file in the process.  If the caller wants a backup copy
2618  * of the file to exist, they should call 'link(logfile,logbackup)'
2619  * before calling this routine.
2620  */
2621 void
2622 createlog(const struct conf_entry *ent)
2623 {
2624         int fd, failed;
2625         struct stat st;
2626         char *realfile, *slash, tempfile[MAXPATHLEN];
2627
2628         fd = -1;
2629         realfile = ent->log;
2630
2631         /*
2632          * If this log file is being created for the first time (-C option),
2633          * then it may also be true that the parent directory does not exist
2634          * yet.  Check, and create that directory if it is missing.
2635          */
2636         if (ent->firstcreate) {
2637                 strlcpy(tempfile, realfile, sizeof(tempfile));
2638                 slash = strrchr(tempfile, '/');
2639                 if (slash != NULL) {
2640                         *slash = '\0';
2641                         failed = stat(tempfile, &st);
2642                         if (failed && errno != ENOENT)
2643                                 err(1, "Error on stat(%s)", tempfile);
2644                         if (failed)
2645                                 createdir(ent, tempfile);
2646                         else if (!S_ISDIR(st.st_mode))
2647                                 errx(1, "%s exists but is not a directory",
2648                                     tempfile);
2649                 }
2650         }
2651
2652         /*
2653          * First create an unused filename, so it can be chown'ed and
2654          * chmod'ed before it is moved into the real location.  mkstemp
2655          * will create the file mode=600 & owned by us.  Note that all
2656          * temp files will have a suffix of '.z<something>'.
2657          */
2658         strlcpy(tempfile, realfile, sizeof(tempfile));
2659         strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2660         if (noaction)
2661                 printf("\tmktemp %s\n", tempfile);
2662         else {
2663                 fd = mkstemp(tempfile);
2664                 if (fd < 0)
2665                         err(1, "can't mkstemp logfile %s", tempfile);
2666
2667                 /*
2668                  * Add status message to what will become the new log file.
2669                  */
2670                 if (!(ent->flags & CE_BINARY)) {
2671                         if (log_trim(tempfile, ent))
2672                                 err(1, "can't add status message to log");
2673                 }
2674         }
2675
2676         /* Change the owner/group, if we are supposed to */
2677         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2678                 if (noaction)
2679                         printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2680                             tempfile);
2681                 else {
2682                         failed = fchown(fd, ent->uid, ent->gid);
2683                         if (failed)
2684                                 err(1, "can't fchown temp file %s", tempfile);
2685                 }
2686         }
2687
2688         /* Turn on NODUMP if it was requested in the config-file. */
2689         if (ent->flags & CE_NODUMP) {
2690                 if (noaction)
2691                         printf("\tchflags nodump %s\n", tempfile);
2692                 else {
2693                         failed = fchflags(fd, UF_NODUMP);
2694                         if (failed) {
2695                                 warn("log_trim: fchflags(NODUMP)");
2696                         }
2697                 }
2698         }
2699
2700         /*
2701          * Note that if the real logfile still exists, and if the call
2702          * to rename() fails, then "neither the old file nor the new
2703          * file shall be changed or created" (to quote the standard).
2704          * If the call succeeds, then the file will be replaced without
2705          * any window where some other process might find that the file
2706          * did not exist.
2707          * XXX - ? It may be that for some error conditions, we could
2708          *      retry by first removing the realfile and then renaming.
2709          */
2710         if (noaction) {
2711                 printf("\tchmod %o %s\n", ent->permissions, tempfile);
2712                 printf("\tmv %s %s\n", tempfile, realfile);
2713         } else {
2714                 failed = fchmod(fd, ent->permissions);
2715                 if (failed)
2716                         err(1, "can't fchmod temp file '%s'", tempfile);
2717                 failed = rename(tempfile, realfile);
2718                 if (failed)
2719                         err(1, "can't mv %s to %s", tempfile, realfile);
2720         }
2721
2722         if (fd >= 0)
2723                 close(fd);
2724 }
2725
2726 /*
2727  * Change the attributes of a given filename to what was specified in
2728  * the newsyslog.conf entry.  This routine is only called for files
2729  * that newsyslog expects that it has created, and thus it is a fatal
2730  * error if this routine finds that the file does not exist.
2731  */
2732 static void
2733 change_attrs(const char *fname, const struct conf_entry *ent)
2734 {
2735         int failed;
2736
2737         if (noaction) {
2738                 printf("\tchmod %o %s\n", ent->permissions, fname);
2739
2740                 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2741                         printf("\tchown %u:%u %s\n",
2742                             ent->uid, ent->gid, fname);
2743
2744                 if (ent->flags & CE_NODUMP)
2745                         printf("\tchflags nodump %s\n", fname);
2746                 return;
2747         }
2748
2749         failed = chmod(fname, ent->permissions);
2750         if (failed) {
2751                 if (errno != EPERM)
2752                         err(1, "chmod(%s) in change_attrs", fname);
2753                 warn("change_attrs couldn't chmod(%s)", fname);
2754         }
2755
2756         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2757                 failed = chown(fname, ent->uid, ent->gid);
2758                 if (failed)
2759                         warn("can't chown %s", fname);
2760         }
2761
2762         if (ent->flags & CE_NODUMP) {
2763                 failed = chflags(fname, UF_NODUMP);
2764                 if (failed)
2765                         warn("can't chflags %s NODUMP", fname);
2766         }
2767 }
2768
2769 /*
2770  * Parse a signal number or signal name. Returns the signal number parsed or -1
2771  * on failure.
2772  */
2773 static int
2774 parse_signal(const char *str)
2775 {
2776         int sig, i;
2777         const char *errstr;
2778
2779         sig = strtonum(str, 1, sys_nsig - 1, &errstr);
2780
2781         if (errstr == NULL)
2782                 return (sig);
2783         if (strncasecmp(str, "SIG", 3) == 0)
2784                 str += 3;
2785
2786         for (i = 1; i < sys_nsig; i++) {
2787                 if (strcasecmp(str, sys_signame[i]) == 0)
2788                         return (i);
2789         }
2790
2791         return (-1);
2792 }