usr.sbin/newsyslog/newsyslog.c

   1 /*-
   2  * ------+---------+---------+-------- + --------+---------+---------+---------*
   3  * This file includes significant modifications done by:
   4  * Copyright (c) 2003, 2004  - Garance Alistair Drosehn <gad@FreeBSD.org>.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *   1. Redistributions of source code must retain the above copyright
  11  *      notice, this list of conditions and the following disclaimer.
  12  *   2. Redistributions in binary form must reproduce the above copyright
  13  *      notice, this list of conditions and the following disclaimer in the
  14  *      documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * ------+---------+---------+-------- + --------+---------+---------+---------*
  29  */
  30
  31 /*
  32  * This file contains changes from the Open Software Foundation.
  33  */
  34
  35 /*
  36  * Copyright 1988, 1989 by the Massachusetts Institute of Technology
  37  *
  38  * Permission to use, copy, modify, and distribute this software and its
  39  * documentation for any purpose and without fee is hereby granted, provided
  40  * that the above copyright notice appear in all copies and that both that
  41  * copyright notice and this permission notice appear in supporting
  42  * documentation, and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
  43  * used in advertising or publicity pertaining to distribution of the
  44  * software without specific, written prior permission. M.I.T. and the M.I.T.
  45  * S.I.P.B. make no representations about the suitability of this software
  46  * for any purpose.  It is provided "as is" without express or implied
  47  * warranty.
  48  *
  49  */
  50
  51 /*
  52  * newsyslog - roll over selected logs at the appropriate time, keeping the a
  53  * specified number of backup files around.
  54  */
  55
  56 #include <sys/cdefs.h>
  57 __FBSDID("$FreeBSD$");
  58
  59 #define OSF
  60
  61 #include <sys/param.h>
  62 #include <sys/queue.h>
  63 #include <sys/stat.h>
  64 #include <sys/wait.h>
  65
  66 #include <assert.h>
  67 #include <ctype.h>
  68 #include <err.h>
  69 #include <errno.h>
  70 #include <dirent.h>
  71 #include <fcntl.h>
  72 #include <fnmatch.h>
  73 #include <glob.h>
  74 #include <grp.h>
  75 #include <paths.h>
  76 #include <pwd.h>
  77 #include <signal.h>
  78 #include <stdio.h>
  79 #include <libgen.h>
  80 #include <stdlib.h>
  81 #include <string.h>
  82 #include <syslog.h>
  83 #include <time.h>
  84 #include <unistd.h>
  85
  86 #include "pathnames.h"
  87 #include "extern.h"
  88
  89 /*
  90  * Compression suffixes
  91  */
  92 #ifndef COMPRESS_SUFFIX_GZ
  93 #define COMPRESS_SUFFIX_GZ      ".gz"
  94 #endif
  95
  96 #ifndef COMPRESS_SUFFIX_BZ2
  97 #define COMPRESS_SUFFIX_BZ2     ".bz2"
  98 #endif
  99
 100 #ifndef COMPRESS_SUFFIX_XZ
 101 #define COMPRESS_SUFFIX_XZ      ".xz"
 102 #endif
 103
 104 #ifndef COMPRESS_SUFFIX_ZST
 105 #define COMPRESS_SUFFIX_ZST     ".zst"
 106 #endif
 107
 108 #define COMPRESS_SUFFIX_MAXLEN  MAX(MAX(sizeof(COMPRESS_SUFFIX_GZ),sizeof(COMPRESS_SUFFIX_BZ2)),sizeof(COMPRESS_SUFFIX_XZ))
 109
 110 /*
 111  * Compression types
 112  */
 113 #define COMPRESS_TYPES  5       /* Number of supported compression types */
 114
 115 #define COMPRESS_NONE   0
 116 #define COMPRESS_GZIP   1
 117 #define COMPRESS_BZIP2  2
 118 #define COMPRESS_XZ     3
 119 #define COMPRESS_ZSTD   4
 120
 121 /*
 122  * Bit-values for the 'flags' parsed from a config-file entry.
 123  */
 124 #define CE_BINARY       0x0008  /* Logfile is in binary, do not add status */
 125                                 /*    messages to logfile(s) when rotating. */
 126 #define CE_NOSIGNAL     0x0010  /* There is no process to signal when */
 127                                 /*    trimming this file. */
 128 #define CE_TRIMAT       0x0020  /* trim file at a specific time. */
 129 #define CE_GLOB         0x0040  /* name of the log is file name pattern. */
 130 #define CE_SIGNALGROUP  0x0080  /* Signal a process-group instead of a single */
 131                                 /*    process when trimming this file. */
 132 #define CE_CREATE       0x0100  /* Create the log file if it does not exist. */
 133 #define CE_NODUMP       0x0200  /* Set 'nodump' on newly created log file. */
 134 #define CE_PID2CMD      0x0400  /* Replace PID file with a shell command.*/
 135
 136 #define CE_RFC5424      0x0800  /* Use RFC5424 format rotation message */
 137
 138 #define MIN_PID         5       /* Don't touch pids lower than this */
 139 #define MAX_PID         99999   /* was lower, see /usr/include/sys/proc.h */
 140
 141 #define kbytes(size)  (((size) + 1023) >> 10)
 142
 143 #define DEFAULT_MARKER  "<default>"
 144 #define DEBUG_MARKER    "<debug>"
 145 #define INCLUDE_MARKER  "<include>"
 146 #define DEFAULT_TIMEFNAME_FMT   "%Y%m%dT%H%M%S"
 147
 148 #define MAX_OLDLOGS 65536       /* Default maximum number of old logfiles */
 149
 150 struct compress_types {
 151         const char *flag;       /* Flag in configuration file */
 152         const char *suffix;     /* Compression suffix */
 153         const char *path;       /* Path to compression program */
 154         char **args;            /* Compression program arguments */
 155 };
 156
 157 static char f_arg[] = "-f";
 158 static char q_arg[] = "-q";
 159 static char rm_arg[] = "--rm";
 160 static char *gz_args[] ={ NULL, f_arg, NULL, NULL };
 161 #define bzip2_args gz_args
 162 #define xz_args gz_args
 163 static char *zstd_args[] = { NULL, q_arg, rm_arg, NULL, NULL };
 164
 165 #define ARGS_NUM 4
 166 static const struct compress_types compress_type[COMPRESS_TYPES] = {
 167         { "", "", "", NULL},                                    /* none */
 168         { "Z", COMPRESS_SUFFIX_GZ, _PATH_GZIP, gz_args},        /* gzip */
 169         { "J", COMPRESS_SUFFIX_BZ2, _PATH_BZIP2, bzip2_args},   /* bzip2 */
 170         { "X", COMPRESS_SUFFIX_XZ, _PATH_XZ, xz_args },         /* xz */
 171         { "Y", COMPRESS_SUFFIX_ZST, _PATH_ZSTD, zstd_args }     /* zst */
 172 };
 173
 174 struct conf_entry {
 175         STAILQ_ENTRY(conf_entry) cf_nextp;
 176         char *log;              /* Name of the log */
 177         char *pid_cmd_file;             /* PID or command file */
 178         char *r_reason;         /* The reason this file is being rotated */
 179         int firstcreate;        /* Creating log for the first time (-C). */
 180         int rotate;             /* Non-zero if this file should be rotated */
 181         int fsize;              /* size found for the log file */
 182         uid_t uid;              /* Owner of log */
 183         gid_t gid;              /* Group of log */
 184         int numlogs;            /* Number of logs to keep */
 185         int trsize;             /* Size cutoff to trigger trimming the log */
 186         int hours;              /* Hours between log trimming */
 187         struct ptime_data *trim_at;     /* Specific time to do trimming */
 188         unsigned int permissions;       /* File permissions on the log */
 189         int flags;              /* CE_BINARY */
 190         int compress;           /* Compression */
 191         int sig;                /* Signal to send */
 192         int def_cfg;            /* Using the <default> rule for this file */
 193 };
 194
 195 struct sigwork_entry {
 196         SLIST_ENTRY(sigwork_entry) sw_nextp;
 197         int      sw_signum;             /* the signal to send */
 198         int      sw_pidok;              /* true if pid value is valid */
 199         pid_t    sw_pid;                /* the process id from the PID file */
 200         const char *sw_pidtype;         /* "daemon" or "process group" */
 201         int      sw_runcmd;             /* run command or send PID to signal */
 202         char     sw_fname[1];           /* file the PID was read from or shell cmd */
 203 };
 204
 205 struct zipwork_entry {
 206         SLIST_ENTRY(zipwork_entry) zw_nextp;
 207         const struct conf_entry *zw_conf;       /* for chown/perm/flag info */
 208         const struct sigwork_entry *zw_swork;   /* to know success of signal */
 209         int      zw_fsize;              /* size of the file to compress */
 210         char     zw_fname[1];           /* the file to compress */
 211 };
 212
 213 struct include_entry {
 214         STAILQ_ENTRY(include_entry) inc_nextp;
 215         const char *file;       /* Name of file to process */
 216 };
 217
 218 struct oldlog_entry {
 219         char *fname;            /* Filename of the log file */
 220         time_t t;               /* Parsed timestamp of the logfile */
 221 };
 222
 223 typedef enum {
 224         FREE_ENT, KEEP_ENT
 225 }       fk_entry;
 226
 227 STAILQ_HEAD(cflist, conf_entry);
 228 static SLIST_HEAD(swlisthead, sigwork_entry) swhead =
 229     SLIST_HEAD_INITIALIZER(swhead);
 230 static SLIST_HEAD(zwlisthead, zipwork_entry) zwhead =
 231     SLIST_HEAD_INITIALIZER(zwhead);
 232 STAILQ_HEAD(ilist, include_entry);
 233
 234 int dbg_at_times;               /* -D Show details of 'trim_at' code */
 235
 236 static int archtodir = 0;       /* Archive old logfiles to other directory */
 237 static int createlogs;          /* Create (non-GLOB) logfiles which do not */
 238                                 /*    already exist.  1=='for entries with */
 239                                 /*    C flag', 2=='for all entries'. */
 240 int verbose = 0;                /* Print out what's going on */
 241 static int needroot = 1;        /* Root privs are necessary */
 242 int noaction = 0;               /* Don't do anything, just show it */
 243 static int norotate = 0;        /* Don't rotate */
 244 static int nosignal;            /* Do not send any signals */
 245 static int enforcepid = 0;      /* If PID file does not exist or empty, do nothing */
 246 static int force = 0;           /* Force the trim no matter what */
 247 static int rotatereq = 0;       /* -R = Always rotate the file(s) as given */
 248                                 /*    on the command (this also requires   */
 249                                 /*    that a list of files *are* given on  */
 250                                 /*    the run command). */
 251 static char *requestor;         /* The name given on a -R request */
 252 static char *timefnamefmt = NULL;/* Use time based filenames instead of .0 */
 253 static char *archdirname;       /* Directory path to old logfiles archive */
 254 static char *destdir = NULL;    /* Directory to treat at root for logs */
 255 static const char *conf;        /* Configuration file to use */
 256
 257 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */
 258 static struct ptime_data *timenow; /* The time to use for checking at-fields */
 259
 260 #define DAYTIME_LEN     16
 261 static char daytime[DAYTIME_LEN];/* The current time in human readable form,
 262                                   * used for rotation-tracking messages. */
 263
 264 /* Another buffer to hold the current time in RFC5424 format. Fractional
 265  * seconds are allowed by the RFC, but are not included in the
 266  * rotation-tracking messages written by newsyslog and so are not accounted for
 267  * in the length below.
 268  */
 269 #define DAYTIME_RFC5424_LEN     sizeof("YYYY-MM-DDTHH:MM:SS+00:00")
 270 static char daytime_rfc5424[DAYTIME_RFC5424_LEN];
 271
 272 static char hostname[MAXHOSTNAMELEN]; /* hostname */
 273
 274 static const char *path_syslogpid = _PATH_SYSLOGPID;
 275
 276 static struct cflist *get_worklist(char **files);
 277 static void parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
 278                     struct conf_entry *defconf_p, struct ilist *inclist);
 279 static void add_to_queue(const char *fname, struct ilist *inclist);
 280 static char *sob(char *p);
 281 static char *son(char *p);
 282 static int isnumberstr(const char *);
 283 static int isglobstr(const char *);
 284 static char *missing_field(char *p, char *errline);
 285 static void      change_attrs(const char *, const struct conf_entry *);
 286 static const char *get_logfile_suffix(const char *logfile);
 287 static fk_entry  do_entry(struct conf_entry *);
 288 static fk_entry  do_rotate(const struct conf_entry *);
 289 static void      do_sigwork(struct sigwork_entry *);
 290 static void      do_zipwork(struct zipwork_entry *);
 291 static struct sigwork_entry *
 292                  save_sigwork(const struct conf_entry *);
 293 static struct zipwork_entry *
 294                  save_zipwork(const struct conf_entry *, const struct
 295                     sigwork_entry *, int, const char *);
 296 static void      set_swpid(struct sigwork_entry *, const struct conf_entry *);
 297 static int       sizefile(const char *);
 298 static void expand_globs(struct cflist *work_p, struct cflist *glob_p);
 299 static void free_clist(struct cflist *list);
 300 static void free_entry(struct conf_entry *ent);
 301 static struct conf_entry *init_entry(const char *fname,
 302                 struct conf_entry *src_entry);
 303 static void parse_args(int argc, char **argv);
 304 static int parse_doption(const char *doption);
 305 static void usage(void);
 306 static int log_trim(const char *logname, const struct conf_entry *log_ent);
 307 static int age_old_log(const char *file);
 308 static void savelog(char *from, char *to);
 309 static void createdir(const struct conf_entry *ent, char *dirpart);
 310 static void createlog(const struct conf_entry *ent);
 311 static int parse_signal(const char *str);
 312
 313 /*
 314  * All the following take a parameter of 'int', but expect values in the
 315  * range of unsigned char.  Define wrappers which take values of type 'char',
 316  * whether signed or unsigned, and ensure they end up in the right range.
 317  */
 318 #define isdigitch(Anychar) isdigit((u_char)(Anychar))
 319 #define isprintch(Anychar) isprint((u_char)(Anychar))
 320 #define isspacech(Anychar) isspace((u_char)(Anychar))
 321 #define tolowerch(Anychar) tolower((u_char)(Anychar))
 322
 323 int
 324 main(int argc, char **argv)
 325 {
 326         struct cflist *worklist;
 327         struct conf_entry *p;
 328         struct sigwork_entry *stmp;
 329         struct zipwork_entry *ztmp;
 330
 331         SLIST_INIT(&swhead);
 332         SLIST_INIT(&zwhead);
 333
 334         parse_args(argc, argv);
 335         argc -= optind;
 336         argv += optind;
 337
 338         if (needroot && getuid() && geteuid())
 339                 errx(1, "must have root privs");
 340         worklist = get_worklist(argv);
 341
 342         /*
 343          * Rotate all the files which need to be rotated.  Note that
 344          * some users have *hundreds* of entries in newsyslog.conf!
 345          */
 346         while (!STAILQ_EMPTY(worklist)) {
 347                 p = STAILQ_FIRST(worklist);
 348                 STAILQ_REMOVE_HEAD(worklist, cf_nextp);
 349                 if (do_entry(p) == FREE_ENT)
 350                         free_entry(p);
 351         }
 352
 353         /*
 354          * Send signals to any processes which need a signal to tell
 355          * them to close and re-open the log file(s) we have rotated.
 356          * Note that zipwork_entries include pointers to these
 357          * sigwork_entry's, so we can not free the entries here.
 358          */
 359         if (!SLIST_EMPTY(&swhead)) {
 360                 if (noaction || verbose)
 361                         printf("Signal all daemon process(es)...\n");
 362                 SLIST_FOREACH(stmp, &swhead, sw_nextp)
 363                         do_sigwork(stmp);
 364                 if (!(rotatereq && nosignal)) {
 365                         if (noaction)
 366                                 printf("\tsleep 10\n");
 367                         else {
 368                                 if (verbose)
 369                                         printf("Pause 10 seconds to allow "
 370                                             "daemon(s) to close log file(s)\n");
 371                                 sleep(10);
 372                         }
 373                 }
 374         }
 375         /*
 376          * Compress all files that we're expected to compress, now
 377          * that all processes should have closed the files which
 378          * have been rotated.
 379          */
 380         if (!SLIST_EMPTY(&zwhead)) {
 381                 if (noaction || verbose)
 382                         printf("Compress all rotated log file(s)...\n");
 383                 while (!SLIST_EMPTY(&zwhead)) {
 384                         ztmp = SLIST_FIRST(&zwhead);
 385                         do_zipwork(ztmp);
 386                         SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
 387                         free(ztmp);
 388                 }
 389         }
 390         /* Now free all the sigwork entries. */
 391         while (!SLIST_EMPTY(&swhead)) {
 392                 stmp = SLIST_FIRST(&swhead);
 393                 SLIST_REMOVE_HEAD(&swhead, sw_nextp);
 394                 free(stmp);
 395         }
 396
 397         while (wait(NULL) > 0 || errno == EINTR)
 398                 ;
 399         return (0);
 400 }
 401
 402 static struct conf_entry *
 403 init_entry(const char *fname, struct conf_entry *src_entry)
 404 {
 405         struct conf_entry *tempwork;
 406
 407         if (verbose > 4)
 408                 printf("\t--> [creating entry for %s]\n", fname);
 409
 410         tempwork = malloc(sizeof(struct conf_entry));
 411         if (tempwork == NULL)
 412                 err(1, "malloc of conf_entry for %s", fname);
 413
 414         if (destdir == NULL || fname[0] != '/')
 415                 tempwork->log = strdup(fname);
 416         else
 417                 asprintf(&tempwork->log, "%s%s", destdir, fname);
 418         if (tempwork->log == NULL)
 419                 err(1, "strdup for %s", fname);
 420
 421         if (src_entry != NULL) {
 422                 tempwork->pid_cmd_file = NULL;
 423                 if (src_entry->pid_cmd_file)
 424                         tempwork->pid_cmd_file = strdup(src_entry->pid_cmd_file);
 425                 tempwork->r_reason = NULL;
 426                 tempwork->firstcreate = 0;
 427                 tempwork->rotate = 0;
 428                 tempwork->fsize = -1;
 429                 tempwork->uid = src_entry->uid;
 430                 tempwork->gid = src_entry->gid;
 431                 tempwork->numlogs = src_entry->numlogs;
 432                 tempwork->trsize = src_entry->trsize;
 433                 tempwork->hours = src_entry->hours;
 434                 tempwork->trim_at = NULL;
 435                 if (src_entry->trim_at != NULL)
 436                         tempwork->trim_at = ptime_init(src_entry->trim_at);
 437                 tempwork->permissions = src_entry->permissions;
 438                 tempwork->flags = src_entry->flags;
 439                 tempwork->compress = src_entry->compress;
 440                 tempwork->sig = src_entry->sig;
 441                 tempwork->def_cfg = src_entry->def_cfg;
 442         } else {
 443                 /* Initialize as a "do-nothing" entry */
 444                 tempwork->pid_cmd_file = NULL;
 445                 tempwork->r_reason = NULL;
 446                 tempwork->firstcreate = 0;
 447                 tempwork->rotate = 0;
 448                 tempwork->fsize = -1;
 449                 tempwork->uid = (uid_t)-1;
 450                 tempwork->gid = (gid_t)-1;
 451                 tempwork->numlogs = 1;
 452                 tempwork->trsize = -1;
 453                 tempwork->hours = -1;
 454                 tempwork->trim_at = NULL;
 455                 tempwork->permissions = 0;
 456                 tempwork->flags = 0;
 457                 tempwork->compress = COMPRESS_NONE;
 458                 tempwork->sig = SIGHUP;
 459                 tempwork->def_cfg = 0;
 460         }
 461
 462         return (tempwork);
 463 }
 464
 465 static void
 466 free_entry(struct conf_entry *ent)
 467 {
 468
 469         if (ent == NULL)
 470                 return;
 471
 472         if (ent->log != NULL) {
 473                 if (verbose > 4)
 474                         printf("\t--> [freeing entry for %s]\n", ent->log);
 475                 free(ent->log);
 476                 ent->log = NULL;
 477         }
 478
 479         if (ent->pid_cmd_file != NULL) {
 480                 free(ent->pid_cmd_file);
 481                 ent->pid_cmd_file = NULL;
 482         }
 483
 484         if (ent->r_reason != NULL) {
 485                 free(ent->r_reason);
 486                 ent->r_reason = NULL;
 487         }
 488
 489         if (ent->trim_at != NULL) {
 490                 ptime_free(ent->trim_at);
 491                 ent->trim_at = NULL;
 492         }
 493
 494         free(ent);
 495 }
 496
 497 static void
 498 free_clist(struct cflist *list)
 499 {
 500         struct conf_entry *ent;
 501
 502         while (!STAILQ_EMPTY(list)) {
 503                 ent = STAILQ_FIRST(list);
 504                 STAILQ_REMOVE_HEAD(list, cf_nextp);
 505                 free_entry(ent);
 506         }
 507
 508         free(list);
 509         list = NULL;
 510 }
 511
 512 static fk_entry
 513 do_entry(struct conf_entry * ent)
 514 {
 515 #define REASON_MAX      80
 516         int modtime;
 517         fk_entry free_or_keep;
 518         double diffsecs;
 519         char temp_reason[REASON_MAX];
 520         int oversized;
 521
 522         free_or_keep = FREE_ENT;
 523         if (verbose)
 524                 printf("%s <%d%s>: ", ent->log, ent->numlogs,
 525                     compress_type[ent->compress].flag);
 526         ent->fsize = sizefile(ent->log);
 527         oversized = ((ent->trsize > 0) && (ent->fsize >= ent->trsize));
 528         modtime = age_old_log(ent->log);
 529         ent->rotate = 0;
 530         ent->firstcreate = 0;
 531         if (ent->fsize < 0) {
 532                 /*
 533                  * If either the C flag or the -C option was specified,
 534                  * and if we won't be creating the file, then have the
 535                  * verbose message include a hint as to why the file
 536                  * will not be created.
 537                  */
 538                 temp_reason[0] = '\0';
 539                 if (createlogs > 1)
 540                         ent->firstcreate = 1;
 541                 else if ((ent->flags & CE_CREATE) && createlogs)
 542                         ent->firstcreate = 1;
 543                 else if (ent->flags & CE_CREATE)
 544                         strlcpy(temp_reason, " (no -C option)", REASON_MAX);
 545                 else if (createlogs)
 546                         strlcpy(temp_reason, " (no C flag)", REASON_MAX);
 547
 548                 if (ent->firstcreate) {
 549                         if (verbose)
 550                                 printf("does not exist -> will create.\n");
 551                         createlog(ent);
 552                 } else if (verbose) {
 553                         printf("does not exist, skipped%s.\n", temp_reason);
 554                 }
 555         } else {
 556                 if (ent->flags & CE_TRIMAT && !force && !rotatereq &&
 557                     !oversized) {
 558                         diffsecs = ptimeget_diff(timenow, ent->trim_at);
 559                         if (diffsecs < 0.0) {
 560                                 /* trim_at is some time in the future. */
 561                                 if (verbose) {
 562                                         ptime_adjust4dst(ent->trim_at,
 563                                             timenow);
 564                                         printf("--> will trim at %s",
 565                                             ptimeget_ctime(ent->trim_at));
 566                                 }
 567                                 return (free_or_keep);
 568                         } else if (diffsecs >= 3600.0) {
 569                                 /*
 570                                  * trim_at is more than an hour in the past,
 571                                  * so find the next valid trim_at time, and
 572                                  * tell the user what that will be.
 573                                  */
 574                                 if (verbose && dbg_at_times)
 575                                         printf("\n\t--> prev trim at %s\t",
 576                                             ptimeget_ctime(ent->trim_at));
 577                                 if (verbose) {
 578                                         ptimeset_nxtime(ent->trim_at);
 579                                         printf("--> will trim at %s",
 580                                             ptimeget_ctime(ent->trim_at));
 581                                 }
 582                                 return (free_or_keep);
 583                         } else if (verbose && noaction && dbg_at_times) {
 584                                 /*
 585                                  * If we are just debugging at-times, then
 586                                  * a detailed message is helpful.  Also
 587                                  * skip "doing" any commands, since they
 588                                  * would all be turned off by no-action.
 589                                  */
 590                                 printf("\n\t--> timematch at %s",
 591                                     ptimeget_ctime(ent->trim_at));
 592                                 return (free_or_keep);
 593                         } else if (verbose && ent->hours <= 0) {
 594                                 printf("--> time is up\n");
 595                         }
 596                 }
 597                 if (verbose && (ent->trsize > 0))
 598                         printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
 599                 if (verbose && (ent->hours > 0))
 600                         printf(" age (hr): %d [%d] ", modtime, ent->hours);
 601
 602                 /*
 603                  * Figure out if this logfile needs to be rotated.
 604                  */
 605                 temp_reason[0] = '\0';
 606                 if (rotatereq) {
 607                         ent->rotate = 1;
 608                         snprintf(temp_reason, REASON_MAX, " due to -R from %s",
 609                             requestor);
 610                 } else if (force) {
 611                         ent->rotate = 1;
 612                         snprintf(temp_reason, REASON_MAX, " due to -F request");
 613                 } else if (oversized) {
 614                         ent->rotate = 1;
 615                         snprintf(temp_reason, REASON_MAX, " due to size>%dK",
 616                             ent->trsize);
 617                 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
 618                         ent->rotate = 1;
 619                 } else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
 620                     (modtime < 0))) {
 621                         ent->rotate = 1;
 622                 }
 623
 624                 /*
 625                  * If the file needs to be rotated, then rotate it.
 626                  */
 627                 if (ent->rotate && !norotate) {
 628                         if (temp_reason[0] != '\0')
 629                                 ent->r_reason = strdup(temp_reason);
 630                         if (verbose)
 631                                 printf("--> trimming log....\n");
 632                         if (noaction && !verbose)
 633                                 printf("%s <%d%s>: trimming\n", ent->log,
 634                                     ent->numlogs,
 635                                     compress_type[ent->compress].flag);
 636                         free_or_keep = do_rotate(ent);
 637                 } else {
 638                         if (verbose)
 639                                 printf("--> skipping\n");
 640                 }
 641         }
 642         return (free_or_keep);
 643 #undef REASON_MAX
 644 }
 645
 646 static void
 647 parse_args(int argc, char **argv)
 648 {
 649         int ch;
 650         char *p;
 651
 652         timenow = ptime_init(NULL);
 653         ptimeset_time(timenow, time(NULL));
 654         strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN);
 655         ptimeget_ctime_rfc5424(timenow, daytime_rfc5424, DAYTIME_RFC5424_LEN);
 656
 657         /* Let's get our hostname */
 658         (void)gethostname(hostname, sizeof(hostname));
 659
 660         /* Truncate domain */
 661         if ((p = strchr(hostname, '.')) != NULL)
 662                 *p = '\0';
 663
 664         /* Parse command line options. */
 665         while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1)
 666                 switch (ch) {
 667                 case 'a':
 668                         archtodir++;
 669                         archdirname = optarg;
 670                         break;
 671                 case 'd':
 672                         destdir = optarg;
 673                         break;
 674                 case 'f':
 675                         conf = optarg;
 676                         break;
 677                 case 'n':
 678                         noaction++;
 679                         /* FALLTHROUGH */
 680                 case 'r':
 681                         needroot = 0;
 682                         break;
 683                 case 's':
 684                         nosignal = 1;
 685                         break;
 686                 case 't':
 687                         if (optarg[0] == '\0' ||
 688                             strcmp(optarg, "DEFAULT") == 0)
 689                                 timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT);
 690                         else
 691                                 timefnamefmt = strdup(optarg);
 692                         break;
 693                 case 'v':
 694                         verbose++;
 695                         break;
 696                 case 'C':
 697                         /* Useful for things like rc.diskless... */
 698                         createlogs++;
 699                         break;
 700                 case 'D':
 701                         /*
 702                          * Set some debugging option.  The specific option
 703                          * depends on the value of optarg.  These options
 704                          * may come and go without notice or documentation.
 705                          */
 706                         if (parse_doption(optarg))
 707                                 break;
 708                         usage();
 709                         /* NOTREACHED */
 710                 case 'F':
 711                         force++;
 712                         break;
 713                 case 'N':
 714                         norotate++;
 715                         break;
 716                 case 'P':
 717                         enforcepid++;
 718                         break;
 719                 case 'R':
 720                         rotatereq++;
 721                         requestor = strdup(optarg);
 722                         break;
 723                 case 'S':
 724                         path_syslogpid = optarg;
 725                         break;
 726                 case 'm':       /* Used by OpenBSD for "monitor mode" */
 727                 default:
 728                         usage();
 729                         /* NOTREACHED */
 730                 }
 731
 732         if (force && norotate) {
 733                 warnx("Only one of -F and -N may be specified.");
 734                 usage();
 735                 /* NOTREACHED */
 736         }
 737
 738         if (rotatereq) {
 739                 if (optind == argc) {
 740                         warnx("At least one filename must be given when -R is specified.");
 741                         usage();
 742                         /* NOTREACHED */
 743                 }
 744                 /* Make sure "requestor" value is safe for a syslog message. */
 745                 for (p = requestor; *p != '\0'; p++) {
 746                         if (!isprintch(*p) && (*p != '\t'))
 747                                 *p = '.';
 748                 }
 749         }
 750
 751         if (dbg_timenow) {
 752                 /*
 753                  * Note that the 'daytime' variable is not changed.
 754                  * That is only used in messages that track when a
 755                  * logfile is rotated, and if a file *is* rotated,
 756                  * then it will still rotated at the "real now" time.
 757                  */
 758                 ptime_free(timenow);
 759                 timenow = dbg_timenow;
 760                 fprintf(stderr, "Debug: Running as if TimeNow is %s",
 761                     ptimeget_ctime(dbg_timenow));
 762         }
 763
 764 }
 765
 766 /*
 767  * These debugging options are mainly meant for developer use, such
 768  * as writing regression-tests.  They would not be needed by users
 769  * during normal operation of newsyslog...
 770  */
 771 static int
 772 parse_doption(const char *doption)
 773 {
 774         const char TN[] = "TN=";
 775         int res;
 776
 777         if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
 778                 /*
 779                  * The "TimeNow" debugging option.  This might be off
 780                  * by an hour when crossing a timezone change.
 781                  */
 782                 dbg_timenow = ptime_init(NULL);
 783                 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
 784                     time(NULL), doption + sizeof(TN) - 1);
 785                 if (res == -2) {
 786                         warnx("Non-existent time specified on -D %s", doption);
 787                         return (0);                     /* failure */
 788                 } else if (res < 0) {
 789                         warnx("Malformed time given on -D %s", doption);
 790                         return (0);                     /* failure */
 791                 }
 792                 return (1);                     /* successfully parsed */
 793
 794         }
 795
 796         if (strcmp(doption, "ats") == 0) {
 797                 dbg_at_times++;
 798                 return (1);                     /* successfully parsed */
 799         }
 800
 801         /* XXX - This check could probably be dropped. */
 802         if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder")
 803             == 0)) {
 804                 warnx("NOTE: newsyslog always uses 'neworder'.");
 805                 return (1);                     /* successfully parsed */
 806         }
 807
 808         warnx("Unknown -D (debug) option: '%s'", doption);
 809         return (0);                             /* failure */
 810 }
 811
 812 static void
 813 usage(void)
 814 {
 815
 816         fprintf(stderr,
 817             "usage: newsyslog [-CFNPnrsv] [-a directory] [-d directory] [-f config_file]\n"
 818             "                 [-S pidfile] [-t timefmt] [[-R tagname] file ...]\n");
 819         exit(1);
 820 }
 821
 822 /*
 823  * Parse a configuration file and return a linked list of all the logs
 824  * which should be processed.
 825  */
 826 static struct cflist *
 827 get_worklist(char **files)
 828 {
 829         FILE *f;
 830         char **given;
 831         struct cflist *cmdlist, *filelist, *globlist;
 832         struct conf_entry *defconf, *dupent, *ent;
 833         struct ilist inclist;
 834         struct include_entry *inc;
 835         int gmatch, fnres;
 836
 837         defconf = NULL;
 838         STAILQ_INIT(&inclist);
 839
 840         filelist = malloc(sizeof(struct cflist));
 841         if (filelist == NULL)
 842                 err(1, "malloc of filelist");
 843         STAILQ_INIT(filelist);
 844         globlist = malloc(sizeof(struct cflist));
 845         if (globlist == NULL)
 846                 err(1, "malloc of globlist");
 847         STAILQ_INIT(globlist);
 848
 849         inc = malloc(sizeof(struct include_entry));
 850         if (inc == NULL)
 851                 err(1, "malloc of inc");
 852         inc->file = conf;
 853         if (inc->file == NULL)
 854                 inc->file = _PATH_CONF;
 855         STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp);
 856
 857         STAILQ_FOREACH(inc, &inclist, inc_nextp) {
 858                 if (strcmp(inc->file, "-") != 0)
 859                         f = fopen(inc->file, "r");
 860                 else {
 861                         f = stdin;
 862                         inc->file = "<stdin>";
 863                 }
 864                 if (!f)
 865                         err(1, "%s", inc->file);
 866
 867                 if (verbose)
 868                         printf("Processing %s\n", inc->file);
 869                 parse_file(f, filelist, globlist, defconf, &inclist);
 870                 (void) fclose(f);
 871         }
 872
 873         /*
 874          * All config-file information has been read in and turned into
 875          * a filelist and a globlist.  If there were no specific files
 876          * given on the run command, then the only thing left to do is to
 877          * call a routine which finds all files matched by the globlist
 878          * and adds them to the filelist.  Then return the worklist.
 879          */
 880         if (*files == NULL) {
 881                 expand_globs(filelist, globlist);
 882                 free_clist(globlist);
 883                 if (defconf != NULL)
 884                         free_entry(defconf);
 885                 return (filelist);
 886                 /* NOTREACHED */
 887         }
 888
 889         /*
 890          * If newsyslog was given a specific list of files to process,
 891          * it may be that some of those files were not listed in any
 892          * config file.  Those unlisted files should get the default
 893          * rotation action.  First, create the default-rotation action
 894          * if none was found in a system config file.
 895          */
 896         if (defconf == NULL) {
 897                 defconf = init_entry(DEFAULT_MARKER, NULL);
 898                 defconf->numlogs = 3;
 899                 defconf->trsize = 50;
 900                 defconf->permissions = S_IRUSR|S_IWUSR;
 901         }
 902
 903         /*
 904          * If newsyslog was run with a list of specific filenames,
 905          * then create a new worklist which has only those files in
 906          * it, picking up the rotation-rules for those files from
 907          * the original filelist.
 908          *
 909          * XXX - Note that this will copy multiple rules for a single
 910          *      logfile, if multiple entries are an exact match for
 911          *      that file.  That matches the historic behavior, but do
 912          *      we want to continue to allow it?  If so, it should
 913          *      probably be handled more intelligently.
 914          */
 915         cmdlist = malloc(sizeof(struct cflist));
 916         if (cmdlist == NULL)
 917                 err(1, "malloc of cmdlist");
 918         STAILQ_INIT(cmdlist);
 919
 920         for (given = files; *given; ++given) {
 921                 /*
 922                  * First try to find exact-matches for this given file.
 923                  */
 924                 gmatch = 0;
 925                 STAILQ_FOREACH(ent, filelist, cf_nextp) {
 926                         if (strcmp(ent->log, *given) == 0) {
 927                                 gmatch++;
 928                                 dupent = init_entry(*given, ent);
 929                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 930                         }
 931                 }
 932                 if (gmatch) {
 933                         if (verbose > 2)
 934                                 printf("\t+ Matched entry %s\n", *given);
 935                         continue;
 936                 }
 937
 938                 /*
 939                  * There was no exact-match for this given file, so look
 940                  * for a "glob" entry which does match.
 941                  */
 942                 gmatch = 0;
 943                 if (verbose > 2 && globlist != NULL)
 944                         printf("\t+ Checking globs for %s\n", *given);
 945                 STAILQ_FOREACH(ent, globlist, cf_nextp) {
 946                         fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
 947                         if (verbose > 2)
 948                                 printf("\t+    = %d for pattern %s\n", fnres,
 949                                     ent->log);
 950                         if (fnres == 0) {
 951                                 gmatch++;
 952                                 dupent = init_entry(*given, ent);
 953                                 /* This new entry is not a glob! */
 954                                 dupent->flags &= ~CE_GLOB;
 955                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 956                                 /* Only allow a match to one glob-entry */
 957                                 break;
 958                         }
 959                 }
 960                 if (gmatch) {
 961                         if (verbose > 2)
 962                                 printf("\t+ Matched %s via %s\n", *given,
 963                                     ent->log);
 964                         continue;
 965                 }
 966
 967                 /*
 968                  * This given file was not found in any config file, so
 969                  * add a worklist item based on the default entry.
 970                  */
 971                 if (verbose > 2)
 972                         printf("\t+ No entry matched %s  (will use %s)\n",
 973                             *given, DEFAULT_MARKER);
 974                 dupent = init_entry(*given, defconf);
 975                 /* Mark that it was *not* found in a config file */
 976                 dupent->def_cfg = 1;
 977                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 978         }
 979
 980         /*
 981          * Free all the entries in the original work list, the list of
 982          * glob entries, and the default entry.
 983          */
 984         free_clist(filelist);
 985         free_clist(globlist);
 986         free_entry(defconf);
 987
 988         /* And finally, return a worklist which matches the given files. */
 989         return (cmdlist);
 990 }
 991
 992 /*
 993  * Expand the list of entries with filename patterns, and add all files
 994  * which match those glob-entries onto the worklist.
 995  */
 996 static void
 997 expand_globs(struct cflist *work_p, struct cflist *glob_p)
 998 {
 999         int gmatch, gres;
1000         size_t i;
1001         char *mfname;
1002         struct conf_entry *dupent, *ent, *globent;
1003         glob_t pglob;
1004         struct stat st_fm;
1005
1006         /*
1007          * The worklist contains all fully-specified (non-GLOB) names.
1008          *
1009          * Now expand the list of filename-pattern (GLOB) entries into
1010          * a second list, which (by definition) will only match files
1011          * that already exist.  Do not add a glob-related entry for any
1012          * file which already exists in the fully-specified list.
1013          */
1014         STAILQ_FOREACH(globent, glob_p, cf_nextp) {
1015                 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
1016                 if (gres != 0) {
1017                         warn("cannot expand pattern (%d): %s", gres,
1018                             globent->log);
1019                         continue;
1020                 }
1021
1022                 if (verbose > 2)
1023                         printf("\t+ Expanding pattern %s\n", globent->log);
1024                 for (i = 0; i < pglob.gl_matchc; i++) {
1025                         mfname = pglob.gl_pathv[i];
1026
1027                         /* See if this file already has a specific entry. */
1028                         gmatch = 0;
1029                         STAILQ_FOREACH(ent, work_p, cf_nextp) {
1030                                 if (strcmp(mfname, ent->log) == 0) {
1031                                         gmatch++;
1032                                         break;
1033                                 }
1034                         }
1035                         if (gmatch)
1036                                 continue;
1037
1038                         /* Make sure the named matched is a file. */
1039                         gres = lstat(mfname, &st_fm);
1040                         if (gres != 0) {
1041                                 /* Error on a file that glob() matched?!? */
1042                                 warn("Skipping %s - lstat() error", mfname);
1043                                 continue;
1044                         }
1045                         if (!S_ISREG(st_fm.st_mode)) {
1046                                 /* We only rotate files! */
1047                                 if (verbose > 2)
1048                                         printf("\t+  . skipping %s (!file)\n",
1049                                             mfname);
1050                                 continue;
1051                         }
1052
1053                         if (verbose > 2)
1054                                 printf("\t+  . add file %s\n", mfname);
1055                         dupent = init_entry(mfname, globent);
1056                         /* This new entry is not a glob! */
1057                         dupent->flags &= ~CE_GLOB;
1058
1059                         /* Add to the worklist. */
1060                         STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp);
1061                 }
1062                 globfree(&pglob);
1063                 if (verbose > 2)
1064                         printf("\t+ Done with pattern %s\n", globent->log);
1065         }
1066 }
1067
1068 /*
1069  * Parse a configuration file and update a linked list of all the logs to
1070  * process.
1071  */
1072 static void
1073 parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
1074     struct conf_entry *defconf_p, struct ilist *inclist)
1075 {
1076         char line[BUFSIZ], *parse, *q;
1077         char *cp, *errline, *group;
1078         struct conf_entry *working;
1079         struct passwd *pwd;
1080         struct group *grp;
1081         glob_t pglob;
1082         int eol, ptm_opts, res, special;
1083         size_t i;
1084
1085         errline = NULL;
1086         while (fgets(line, BUFSIZ, cf)) {
1087                 if ((line[0] == '\n') || (line[0] == '#') ||
1088                     (strlen(line) == 0))
1089                         continue;
1090                 if (errline != NULL)
1091                         free(errline);
1092                 errline = strdup(line);
1093                 for (cp = line + 1; *cp != '\0'; cp++) {
1094                         if (*cp != '#')
1095                                 continue;
1096                         if (*(cp - 1) == '\\') {
1097                                 strcpy(cp - 1, cp);
1098                                 cp--;
1099                                 continue;
1100                         }
1101                         *cp = '\0';
1102                         break;
1103                 }
1104
1105                 q = parse = missing_field(sob(line), errline);
1106                 parse = son(line);
1107                 if (!*parse)
1108                         errx(1, "malformed line (missing fields):\n%s",
1109                             errline);
1110                 *parse = '\0';
1111
1112                 /*
1113                  * Allow people to set debug options via the config file.
1114                  * (NOTE: debug options are undocumented, and may disappear
1115                  * at any time, etc).
1116                  */
1117                 if (strcasecmp(DEBUG_MARKER, q) == 0) {
1118                         q = parse = missing_field(sob(parse + 1), errline);
1119                         parse = son(parse);
1120                         if (!*parse)
1121                                 warnx("debug line specifies no option:\n%s",
1122                                     errline);
1123                         else {
1124                                 *parse = '\0';
1125                                 parse_doption(q);
1126                         }
1127                         continue;
1128                 } else if (strcasecmp(INCLUDE_MARKER, q) == 0) {
1129                         if (verbose)
1130                                 printf("Found: %s", errline);
1131                         q = parse = missing_field(sob(parse + 1), errline);
1132                         parse = son(parse);
1133                         if (!*parse) {
1134                                 warnx("include line missing argument:\n%s",
1135                                     errline);
1136                                 continue;
1137                         }
1138
1139                         *parse = '\0';
1140
1141                         if (isglobstr(q)) {
1142                                 res = glob(q, GLOB_NOCHECK, NULL, &pglob);
1143                                 if (res != 0) {
1144                                         warn("cannot expand pattern (%d): %s",
1145                                             res, q);
1146                                         continue;
1147                                 }
1148
1149                                 if (verbose > 2)
1150                                         printf("\t+ Expanding pattern %s\n", q);
1151
1152                                 for (i = 0; i < pglob.gl_matchc; i++)
1153                                         add_to_queue(pglob.gl_pathv[i],
1154                                             inclist);
1155                                 globfree(&pglob);
1156                         } else
1157                                 add_to_queue(q, inclist);
1158                         continue;
1159                 }
1160
1161                 special = 0;
1162                 working = init_entry(q, NULL);
1163                 if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1164                         special = 1;
1165                         if (defconf_p != NULL) {
1166                                 warnx("Ignoring duplicate entry for %s!", q);
1167                                 free_entry(working);
1168                                 continue;
1169                         }
1170                         defconf_p = working;
1171                 }
1172
1173                 q = parse = missing_field(sob(parse + 1), errline);
1174                 parse = son(parse);
1175                 if (!*parse)
1176                         errx(1, "malformed line (missing fields):\n%s",
1177                             errline);
1178                 *parse = '\0';
1179                 if ((group = strchr(q, ':')) != NULL ||
1180                     (group = strrchr(q, '.')) != NULL) {
1181                         *group++ = '\0';
1182                         if (*q) {
1183                                 if (!(isnumberstr(q))) {
1184                                         if ((pwd = getpwnam(q)) == NULL)
1185                                                 errx(1,
1186                                      "error in config file; unknown user:\n%s",
1187                                                     errline);
1188                                         working->uid = pwd->pw_uid;
1189                                 } else
1190                                         working->uid = atoi(q);
1191                         } else
1192                                 working->uid = (uid_t)-1;
1193
1194                         q = group;
1195                         if (*q) {
1196                                 if (!(isnumberstr(q))) {
1197                                         if ((grp = getgrnam(q)) == NULL)
1198                                                 errx(1,
1199                                     "error in config file; unknown group:\n%s",
1200                                                     errline);
1201                                         working->gid = grp->gr_gid;
1202                                 } else
1203                                         working->gid = atoi(q);
1204                         } else
1205                                 working->gid = (gid_t)-1;
1206
1207                         q = parse = missing_field(sob(parse + 1), errline);
1208                         parse = son(parse);
1209                         if (!*parse)
1210                                 errx(1, "malformed line (missing fields):\n%s",
1211                                     errline);
1212                         *parse = '\0';
1213                 } else {
1214                         working->uid = (uid_t)-1;
1215                         working->gid = (gid_t)-1;
1216                 }
1217
1218                 if (!sscanf(q, "%o", &working->permissions))
1219                         errx(1, "error in config file; bad permissions:\n%s",
1220                             errline);
1221
1222                 q = parse = missing_field(sob(parse + 1), errline);
1223                 parse = son(parse);
1224                 if (!*parse)
1225                         errx(1, "malformed line (missing fields):\n%s",
1226                             errline);
1227                 *parse = '\0';
1228                 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1229                         errx(1, "error in config file; bad value for count of logs to save:\n%s",
1230                             errline);
1231
1232                 q = parse = missing_field(sob(parse + 1), errline);
1233                 parse = son(parse);
1234                 if (!*parse)
1235                         errx(1, "malformed line (missing fields):\n%s",
1236                             errline);
1237                 *parse = '\0';
1238                 if (isdigitch(*q))
1239                         working->trsize = atoi(q);
1240                 else if (strcmp(q, "*") == 0)
1241                         working->trsize = -1;
1242                 else {
1243                         warnx("Invalid value of '%s' for 'size' in line:\n%s",
1244                             q, errline);
1245                         working->trsize = -1;
1246                 }
1247
1248                 working->flags = 0;
1249                 working->compress = COMPRESS_NONE;
1250                 q = parse = missing_field(sob(parse + 1), errline);
1251                 parse = son(parse);
1252                 eol = !*parse;
1253                 *parse = '\0';
1254                 {
1255                         char *ep;
1256                         u_long ul;
1257
1258                         ul = strtoul(q, &ep, 10);
1259                         if (ep == q)
1260                                 working->hours = 0;
1261                         else if (*ep == '*')
1262                                 working->hours = -1;
1263                         else if (ul > INT_MAX)
1264                                 errx(1, "interval is too large:\n%s", errline);
1265                         else
1266                                 working->hours = ul;
1267
1268                         if (*ep == '\0' || strcmp(ep, "*") == 0)
1269                                 goto no_trimat;
1270                         if (*ep != '@' && *ep != '$')
1271                                 errx(1, "malformed interval/at:\n%s", errline);
1272
1273                         working->flags |= CE_TRIMAT;
1274                         working->trim_at = ptime_init(NULL);
1275                         ptm_opts = PTM_PARSE_ISO8601;
1276                         if (*ep == '$')
1277                                 ptm_opts = PTM_PARSE_DWM;
1278                         ptm_opts |= PTM_PARSE_MATCHDOM;
1279                         res = ptime_relparse(working->trim_at, ptm_opts,
1280                             ptimeget_secs(timenow), ep + 1);
1281                         if (res == -2)
1282                                 errx(1, "nonexistent time for 'at' value:\n%s",
1283                                     errline);
1284                         else if (res < 0)
1285                                 errx(1, "malformed 'at' value:\n%s", errline);
1286                 }
1287 no_trimat:
1288
1289                 if (eol)
1290                         q = NULL;
1291                 else {
1292                         q = parse = sob(parse + 1);     /* Optional field */
1293                         parse = son(parse);
1294                         if (!*parse)
1295                                 eol = 1;
1296                         *parse = '\0';
1297                 }
1298
1299                 for (; q && *q && !isspacech(*q); q++) {
1300                         switch (tolowerch(*q)) {
1301                         case 'b':
1302                                 working->flags |= CE_BINARY;
1303                                 break;
1304                         case 'c':
1305                                 working->flags |= CE_CREATE;
1306                                 break;
1307                         case 'd':
1308                                 working->flags |= CE_NODUMP;
1309                                 break;
1310                         case 'g':
1311                                 working->flags |= CE_GLOB;
1312                                 break;
1313                         case 'j':
1314                                 working->compress = COMPRESS_BZIP2;
1315                                 break;
1316                         case 'n':
1317                                 working->flags |= CE_NOSIGNAL;
1318                                 break;
1319                         case 'r':
1320                                 working->flags |= CE_PID2CMD;
1321                                 break;
1322                         case 't':
1323                                 working->flags |= CE_RFC5424;
1324                                 break;
1325                         case 'u':
1326                                 working->flags |= CE_SIGNALGROUP;
1327                                 break;
1328                         case 'w':
1329                                 /* Deprecated flag - keep for compatibility purposes */
1330                                 break;
1331                         case 'x':
1332                                 working->compress = COMPRESS_XZ;
1333                                 break;
1334                         case 'y':
1335                                 working->compress = COMPRESS_ZSTD;
1336                                 break;
1337                         case 'z':
1338                                 working->compress = COMPRESS_GZIP;
1339                                 break;
1340                         case '-':
1341                                 break;
1342                         case 'f':       /* Used by OpenBSD for "CE_FOLLOW" */
1343                         case 'm':       /* Used by OpenBSD for "CE_MONITOR" */
1344                         case 'p':       /* Used by NetBSD  for "CE_PLAIN0" */
1345                         default:
1346                                 errx(1, "illegal flag in config file -- %c",
1347                                     *q);
1348                         }
1349                 }
1350
1351                 if (eol)
1352                         q = NULL;
1353                 else {
1354                         q = parse = sob(parse + 1);     /* Optional field */
1355                         parse = son(parse);
1356                         if (!*parse)
1357                                 eol = 1;
1358                         *parse = '\0';
1359                 }
1360
1361                 working->pid_cmd_file = NULL;
1362                 if (q && *q) {
1363                         if (*q == '/')
1364                                 working->pid_cmd_file = strdup(q);
1365                         else if (isalnum(*q))
1366                                 goto got_sig;
1367                         else {
1368                                 errx(1,
1369                         "illegal pid file or signal in config file:\n%s",
1370                                     errline);
1371                         }
1372                 }
1373                 if (eol)
1374                         q = NULL;
1375                 else {
1376                         q = parse = sob(parse + 1);     /* Optional field */
1377                         *(parse = son(parse)) = '\0';
1378                 }
1379
1380                 working->sig = SIGHUP;
1381                 if (q && *q) {
1382 got_sig:
1383                         working->sig = parse_signal(q);
1384                         if (working->sig < 1 || working->sig >= sys_nsig) {
1385                                 errx(1,
1386                                     "illegal signal in config file:\n%s",
1387                                     errline);
1388                         }
1389                 }
1390
1391                 /*
1392                  * Finish figuring out what pid-file to use (if any) in
1393                  * later processing if this logfile needs to be rotated.
1394                  */
1395                 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1396                         /*
1397                          * This config-entry specified 'n' for nosignal,
1398                          * see if it also specified an explicit pid_cmd_file.
1399                          * This would be a pretty pointless combination.
1400                          */
1401                         if (working->pid_cmd_file != NULL) {
1402                                 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1403                                     working->pid_cmd_file, errline);
1404                                 free(working->pid_cmd_file);
1405                                 working->pid_cmd_file = NULL;
1406                         }
1407                 } else if (working->pid_cmd_file == NULL) {
1408                         /*
1409                          * This entry did not specify the 'n' flag, which
1410                          * means it should signal syslogd unless it had
1411                          * specified some other pid-file (and obviously the
1412                          * syslog pid-file will not be for a process-group).
1413                          * Also, we should only try to notify syslog if we
1414                          * are root.
1415                          */
1416                         if (working->flags & CE_SIGNALGROUP) {
1417                                 warnx("Ignoring flag 'U' in line:\n%s",
1418                                     errline);
1419                                 working->flags &= ~CE_SIGNALGROUP;
1420                         }
1421                         if (needroot)
1422                                 working->pid_cmd_file = strdup(path_syslogpid);
1423                 }
1424
1425                 /*
1426                  * Add this entry to the appropriate list of entries, unless
1427                  * it was some kind of special entry (eg: <default>).
1428                  */
1429                 if (special) {
1430                         ;                       /* Do not add to any list */
1431                 } else if (working->flags & CE_GLOB) {
1432                         STAILQ_INSERT_TAIL(glob_p, working, cf_nextp);
1433                 } else {
1434                         STAILQ_INSERT_TAIL(work_p, working, cf_nextp);
1435                 }
1436         }
1437         if (errline != NULL)
1438                 free(errline);
1439 }
1440
1441 static char *
1442 missing_field(char *p, char *errline)
1443 {
1444
1445         if (!p || !*p)
1446                 errx(1, "missing field in config file:\n%s", errline);
1447         return (p);
1448 }
1449
1450 /*
1451  * In our sort we return it in the reverse of what qsort normally
1452  * would do, as we want the newest files first.  If we have two
1453  * entries with the same time we don't really care about order.
1454  *
1455  * Support function for qsort() in delete_oldest_timelog().
1456  */
1457 static int
1458 oldlog_entry_compare(const void *a, const void *b)
1459 {
1460         const struct oldlog_entry *ola = a, *olb = b;
1461
1462         if (ola->t > olb->t)
1463                 return (-1);
1464         else if (ola->t < olb->t)
1465                 return (1);
1466         else
1467                 return (0);
1468 }
1469
1470 /*
1471  * Check whether the file corresponding to dp is an archive of the logfile
1472  * logfname, based on the timefnamefmt format string. Return true and fill out
1473  * tm if this is the case; otherwise return false.
1474  */
1475 static int
1476 validate_old_timelog(int fd, const struct dirent *dp, const char *logfname,
1477     struct tm *tm)
1478 {
1479         struct stat sb;
1480         size_t logfname_len;
1481         char *s;
1482         int c;
1483
1484         logfname_len = strlen(logfname);
1485
1486         if (dp->d_type != DT_REG) {
1487                 /*
1488                  * Some filesystems (e.g. NFS) don't fill out the d_type field
1489                  * and leave it set to DT_UNKNOWN; in this case we must obtain
1490                  * the file type ourselves.
1491                  */
1492                 if (dp->d_type != DT_UNKNOWN ||
1493                     fstatat(fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) != 0 ||
1494                     !S_ISREG(sb.st_mode))
1495                         return (0);
1496         }
1497         /* Ignore everything but files with our logfile prefix. */
1498         if (strncmp(dp->d_name, logfname, logfname_len) != 0)
1499                 return (0);
1500         /* Ignore the actual non-rotated logfile. */
1501         if (dp->d_namlen == logfname_len)
1502                 return (0);
1503
1504         /*
1505          * Make sure we created have found a logfile, so the
1506          * postfix is valid, IE format is: '.<time>(.[bgx]z)?'.
1507          */
1508         if (dp->d_name[logfname_len] != '.') {
1509                 if (verbose)
1510                         printf("Ignoring %s which has unexpected "
1511                             "extension '%s'\n", dp->d_name,
1512                             &dp->d_name[logfname_len]);
1513                 return (0);
1514         }
1515         memset(tm, 0, sizeof(*tm));
1516         if ((s = strptime(&dp->d_name[logfname_len + 1],
1517             timefnamefmt, tm)) == NULL) {
1518                 /*
1519                  * We could special case "old" sequentially named logfiles here,
1520                  * but we do not as that would require special handling to
1521                  * decide which one was the oldest compared to "new" time based
1522                  * logfiles.
1523                  */
1524                 if (verbose)
1525                         printf("Ignoring %s which does not "
1526                             "match time format\n", dp->d_name);
1527                 return (0);
1528         }
1529
1530         for (c = 0; c < COMPRESS_TYPES; c++)
1531                 if (strcmp(s, compress_type[c].suffix) == 0)
1532                         /* We're done. */
1533                         return (1);
1534
1535         if (verbose)
1536                 printf("Ignoring %s which has unexpected extension '%s'\n",
1537                     dp->d_name, s);
1538
1539         return (0);
1540 }
1541
1542 /*
1543  * Delete the oldest logfiles, when using time based filenames.
1544  */
1545 static void
1546 delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
1547 {
1548         char *basebuf, *dirbuf, errbuf[80];
1549         const char *base, *dir;
1550         int dir_fd, i, logcnt, max_logcnt;
1551         struct oldlog_entry *oldlogs;
1552         struct dirent *dp;
1553         struct tm tm;
1554         DIR *dirp;
1555
1556         oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry));
1557         max_logcnt = MAX_OLDLOGS;
1558         logcnt = 0;
1559
1560         if (archive_dir != NULL && archive_dir[0] != '\0') {
1561                 dirbuf = NULL;
1562                 dir = archive_dir;
1563         } else {
1564                 if ((dirbuf = strdup(ent->log)) == NULL)
1565                         err(1, "strdup()");
1566                 dir = dirname(dirbuf);
1567         }
1568
1569         if ((basebuf = strdup(ent->log)) == NULL)
1570                 err(1, "strdup()");
1571         base = basename(basebuf);
1572         if (strcmp(base, "/") == 0)
1573                 errx(1, "Invalid log filename - became '/'");
1574
1575         if (verbose > 2)
1576                 printf("Searching for old logs in %s\n", dir);
1577
1578         /* First we create a 'list' of all archived logfiles */
1579         if ((dirp = opendir(dir)) == NULL)
1580                 err(1, "Cannot open log directory '%s'", dir);
1581         dir_fd = dirfd(dirp);
1582         while ((dp = readdir(dirp)) != NULL) {
1583                 if (validate_old_timelog(dir_fd, dp, base, &tm) == 0)
1584                         continue;
1585
1586                 /*
1587                  * We should now have old an old rotated logfile, so
1588                  * add it to the 'list'.
1589                  */
1590                 if ((oldlogs[logcnt].t = timegm(&tm)) == -1)
1591                         err(1, "Could not convert time string to time value");
1592                 if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL)
1593                         err(1, "strdup()");
1594                 logcnt++;
1595
1596                 /*
1597                  * It is very unlikely we ever run out of space in the
1598                  * logfile array from the default size, but lets
1599                  * handle it anyway...
1600                  */
1601                 if (logcnt >= max_logcnt) {
1602                         max_logcnt *= 4;
1603                         /* Detect integer overflow */
1604                         if (max_logcnt < logcnt)
1605                                 errx(1, "Too many old logfiles found");
1606                         oldlogs = realloc(oldlogs,
1607                             max_logcnt * sizeof(struct oldlog_entry));
1608                         if (oldlogs == NULL)
1609                                 err(1, "realloc()");
1610                 }
1611         }
1612
1613         /* Second, if needed we delete oldest archived logfiles */
1614         if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) {
1615                 oldlogs = realloc(oldlogs, logcnt *
1616                     sizeof(struct oldlog_entry));
1617                 if (oldlogs == NULL)
1618                         err(1, "realloc()");
1619
1620                 /*
1621                  * We now sort the logs in the order of newest to
1622                  * oldest.  That way we can simply skip over the
1623                  * number of records we want to keep.
1624                  */
1625                 qsort(oldlogs, logcnt, sizeof(struct oldlog_entry),
1626                     oldlog_entry_compare);
1627                 for (i = ent->numlogs - 1; i < logcnt; i++) {
1628                         if (noaction)
1629                                 printf("\trm -f %s/%s\n", dir,
1630                                     oldlogs[i].fname);
1631                         else if (unlinkat(dir_fd, oldlogs[i].fname, 0) != 0) {
1632                                 snprintf(errbuf, sizeof(errbuf),
1633                                     "Could not delete old logfile '%s'",
1634                                     oldlogs[i].fname);
1635                                 perror(errbuf);
1636                         }
1637                 }
1638         } else if (verbose > 1)
1639                 printf("No old logs to delete for logfile %s\n", ent->log);
1640
1641         /* Third, cleanup */
1642         closedir(dirp);
1643         for (i = 0; i < logcnt; i++) {
1644                 assert(oldlogs[i].fname != NULL);
1645                 free(oldlogs[i].fname);
1646         }
1647         free(oldlogs);
1648         free(dirbuf);
1649         free(basebuf);
1650 }
1651
1652 /*
1653  * Generate a log filename, when using classic filenames.
1654  */
1655 static void
1656 gen_classiclog_fname(char *fname, size_t fname_sz, const char *archive_dir,
1657     const char *namepart, int numlogs_c)
1658 {
1659
1660         if (archive_dir[0] != '\0')
1661                 (void) snprintf(fname, fname_sz, "%s/%s.%d", archive_dir,
1662                     namepart, numlogs_c);
1663         else
1664                 (void) snprintf(fname, fname_sz, "%s.%d", namepart, numlogs_c);
1665 }
1666
1667 /*
1668  * Delete a rotated logfile, when using classic filenames.
1669  */
1670 static void
1671 delete_classiclog(const char *archive_dir, const char *namepart, int numlog_c)
1672 {
1673         char file1[MAXPATHLEN], zfile1[MAXPATHLEN];
1674         int c;
1675
1676         gen_classiclog_fname(file1, sizeof(file1), archive_dir, namepart,
1677             numlog_c);
1678
1679         for (c = 0; c < COMPRESS_TYPES; c++) {
1680                 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1681                     compress_type[c].suffix);
1682                 if (noaction)
1683                         printf("\trm -f %s\n", zfile1);
1684                 else
1685                         (void) unlink(zfile1);
1686         }
1687 }
1688
1689 /*
1690  * Only add to the queue if the file hasn't already been added. This is
1691  * done to prevent circular include loops.
1692  */
1693 static void
1694 add_to_queue(const char *fname, struct ilist *inclist)
1695 {
1696         struct include_entry *inc;
1697
1698         STAILQ_FOREACH(inc, inclist, inc_nextp) {
1699                 if (strcmp(fname, inc->file) == 0) {
1700                         warnx("duplicate include detected: %s", fname);
1701                         return;
1702                 }
1703         }
1704
1705         inc = malloc(sizeof(struct include_entry));
1706         if (inc == NULL)
1707                 err(1, "malloc of inc");
1708         inc->file = strdup(fname);
1709
1710         if (verbose > 2)
1711                 printf("\t+ Adding %s to the processing queue.\n", fname);
1712
1713         STAILQ_INSERT_TAIL(inclist, inc, inc_nextp);
1714 }
1715
1716 /*
1717  * Search for logfile and return its compression suffix (if supported)
1718  * The suffix detection is first-match in the order of compress_types
1719  *
1720  * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE)
1721  * a zero-length string is returned
1722  */
1723 static const char *
1724 get_logfile_suffix(const char *logfile)
1725 {
1726         struct stat st;
1727         char zfile[MAXPATHLEN];
1728         int c;
1729
1730         for (c = 0; c < COMPRESS_TYPES; c++) {
1731                 (void) strlcpy(zfile, logfile, MAXPATHLEN);
1732                 (void) strlcat(zfile, compress_type[c].suffix, MAXPATHLEN);
1733                 if (lstat(zfile, &st) == 0)
1734                         return (compress_type[c].suffix);
1735         }
1736         return (NULL);
1737 }
1738
1739 static fk_entry
1740 do_rotate(const struct conf_entry *ent)
1741 {
1742         char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1743         char file1[MAXPATHLEN], file2[MAXPATHLEN];
1744         char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1745         const char *logfile_suffix;
1746         char datetimestr[30];
1747         int flags, numlogs_c;
1748         fk_entry free_or_keep;
1749         struct sigwork_entry *swork;
1750         struct stat st;
1751         struct tm tm;
1752         time_t now;
1753
1754         flags = ent->flags;
1755         free_or_keep = FREE_ENT;
1756
1757         if (archtodir) {
1758                 char *p;
1759
1760                 /* build complete name of archive directory into dirpart */
1761                 if (*archdirname == '/') {      /* absolute */
1762                         strlcpy(dirpart, archdirname, sizeof(dirpart));
1763                 } else {        /* relative */
1764                         /* get directory part of logfile */
1765                         strlcpy(dirpart, ent->log, sizeof(dirpart));
1766                         if ((p = strrchr(dirpart, '/')) == NULL)
1767                                 dirpart[0] = '\0';
1768                         else
1769                                 *(p + 1) = '\0';
1770                         strlcat(dirpart, archdirname, sizeof(dirpart));
1771                 }
1772
1773                 /* check if archive directory exists, if not, create it */
1774                 if (lstat(dirpart, &st))
1775                         createdir(ent, dirpart);
1776
1777                 /* get filename part of logfile */
1778                 if ((p = strrchr(ent->log, '/')) == NULL)
1779                         strlcpy(namepart, ent->log, sizeof(namepart));
1780                 else
1781                         strlcpy(namepart, p + 1, sizeof(namepart));
1782         } else {
1783                 /*
1784                  * Tell utility functions we are not using an archive
1785                  * dir.
1786                  */
1787                 dirpart[0] = '\0';
1788                 strlcpy(namepart, ent->log, sizeof(namepart));
1789         }
1790
1791         /* Delete old logs */
1792         if (timefnamefmt != NULL)
1793                 delete_oldest_timelog(ent, dirpart);
1794         else {
1795                 /*
1796                  * Handle cleaning up after legacy newsyslog where we
1797                  * kept ent->numlogs + 1 files.  This code can go away
1798                  * at some point in the future.
1799                  */
1800                 delete_classiclog(dirpart, namepart, ent->numlogs);
1801
1802                 if (ent->numlogs > 0)
1803                         delete_classiclog(dirpart, namepart, ent->numlogs - 1);
1804
1805         }
1806
1807         if (timefnamefmt != NULL) {
1808                 /* If time functions fails we can't really do any sensible */
1809                 if (time(&now) == (time_t)-1 ||
1810                     localtime_r(&now, &tm) == NULL)
1811                         bzero(&tm, sizeof(tm));
1812
1813                 strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm);
1814                 if (archtodir)
1815                         (void) snprintf(file1, sizeof(file1), "%s/%s.%s",
1816                             dirpart, namepart, datetimestr);
1817                 else
1818                         (void) snprintf(file1, sizeof(file1), "%s.%s",
1819                             ent->log, datetimestr);
1820
1821                 /* Don't run the code to move down logs */
1822                 numlogs_c = -1;
1823         } else {
1824                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1825                     ent->numlogs - 1);
1826                 numlogs_c = ent->numlogs - 2;           /* copy for countdown */
1827         }
1828
1829         /* Move down log files */
1830         for (; numlogs_c >= 0; numlogs_c--) {
1831                 (void) strlcpy(file2, file1, sizeof(file2));
1832
1833                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1834                     numlogs_c);
1835
1836                 logfile_suffix = get_logfile_suffix(file1);
1837                 if (logfile_suffix == NULL)
1838                         continue;
1839                 (void) strlcpy(zfile1, file1, MAXPATHLEN);
1840                 (void) strlcpy(zfile2, file2, MAXPATHLEN);
1841                 (void) strlcat(zfile1, logfile_suffix, MAXPATHLEN);
1842                 (void) strlcat(zfile2, logfile_suffix, MAXPATHLEN);
1843
1844                 if (noaction)
1845                         printf("\tmv %s %s\n", zfile1, zfile2);
1846                 else {
1847                         /* XXX - Ought to be checking for failure! */
1848                         (void)rename(zfile1, zfile2);
1849                 }
1850                 change_attrs(zfile2, ent);
1851         }
1852
1853         if (ent->numlogs > 0) {
1854                 if (noaction) {
1855                         /*
1856                          * Note that savelog() may succeed with using link()
1857                          * for the archtodir case, but there is no good way
1858                          * of knowing if it will when doing "noaction", so
1859                          * here we claim that it will have to do a copy...
1860                          */
1861                         if (archtodir)
1862                                 printf("\tcp %s %s\n", ent->log, file1);
1863                         else
1864                                 printf("\tln %s %s\n", ent->log, file1);
1865                         printf("\ttouch %s\t\t"
1866                             "# Update mtime for 'when'-interval processing\n",
1867                             file1);
1868                 } else {
1869                         if (!(flags & CE_BINARY)) {
1870                                 /* Report the trimming to the old log */
1871                                 log_trim(ent->log, ent);
1872                         }
1873                         savelog(ent->log, file1);
1874                         /*
1875                          * Interval-based rotations are done using the mtime of
1876                          * the most recently archived log, so make sure it gets
1877                          * updated during a rotation.
1878                          */
1879                         utimes(file1, NULL);
1880                 }
1881                 change_attrs(file1, ent);
1882         }
1883
1884         /* Create the new log file and move it into place */
1885         if (noaction)
1886                 printf("Start new log...\n");
1887         createlog(ent);
1888
1889         /*
1890          * Save all signalling and file-compression to be done after log
1891          * files from all entries have been rotated.  This way any one
1892          * process will not be sent the same signal multiple times when
1893          * multiple log files had to be rotated.
1894          */
1895         swork = NULL;
1896         if (ent->pid_cmd_file != NULL)
1897                 swork = save_sigwork(ent);
1898         if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) {
1899                 /*
1900                  * The zipwork_entry will include a pointer to this
1901                  * conf_entry, so the conf_entry should not be freed.
1902                  */
1903                 free_or_keep = KEEP_ENT;
1904                 save_zipwork(ent, swork, ent->fsize, file1);
1905         }
1906
1907         return (free_or_keep);
1908 }
1909
1910 static void
1911 do_sigwork(struct sigwork_entry *swork)
1912 {
1913         struct sigwork_entry *nextsig;
1914         int kres, secs;
1915         char *tmp;
1916
1917         if (swork->sw_runcmd == 0 && (!(swork->sw_pidok) || swork->sw_pid == 0))
1918                 return;                 /* no work to do... */
1919
1920         /*
1921          * If nosignal (-s) was specified, then do not signal any process.
1922          * Note that a nosignal request triggers a warning message if the
1923          * rotated logfile needs to be compressed, *unless* -R was also
1924          * specified.  We assume that an `-sR' request came from a process
1925          * which writes to the logfile, and as such, we assume that process
1926          * has already made sure the logfile is not presently in use.  This
1927          * just sets swork->sw_pidok to a special value, and do_zipwork
1928          * will print any necessary warning(s).
1929          */
1930         if (nosignal) {
1931                 if (!rotatereq)
1932                         swork->sw_pidok = -1;
1933                 return;
1934         }
1935
1936         /*
1937          * Compute the pause between consecutive signals.  Use a longer
1938          * sleep time if we will be sending two signals to the same
1939          * daemon or process-group.
1940          */
1941         secs = 0;
1942         nextsig = SLIST_NEXT(swork, sw_nextp);
1943         if (nextsig != NULL) {
1944                 if (swork->sw_pid == nextsig->sw_pid)
1945                         secs = 10;
1946                 else
1947                         secs = 1;
1948         }
1949
1950         if (noaction) {
1951                 if (swork->sw_runcmd)
1952                         printf("\tsh -c '%s %d'\n", swork->sw_fname,
1953                             swork->sw_signum);
1954                 else {
1955                         printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1956                             (int)swork->sw_pid, swork->sw_fname);
1957                         if (secs > 0)
1958                                 printf("\tsleep %d\n", secs);
1959                 }
1960                 return;
1961         }
1962
1963         if (swork->sw_runcmd) {
1964                 asprintf(&tmp, "%s %d", swork->sw_fname, swork->sw_signum);
1965                 if (tmp == NULL) {
1966                         warn("can't allocate memory to run %s",
1967                             swork->sw_fname);
1968                         return;
1969                 }
1970                 if (verbose)
1971                         printf("Run command: %s\n", tmp);
1972                 kres = system(tmp);
1973                 if (kres) {
1974                         warnx("%s: returned non-zero exit code: %d",
1975                             tmp, kres);
1976                 }
1977                 free(tmp);
1978                 return;
1979         }
1980
1981         kres = kill(swork->sw_pid, swork->sw_signum);
1982         if (kres != 0) {
1983                 /*
1984                  * Assume that "no such process" (ESRCH) is something
1985                  * to warn about, but is not an error.  Presumably the
1986                  * process which writes to the rotated log file(s) is
1987                  * gone, in which case we should have no problem with
1988                  * compressing the rotated log file(s).
1989                  */
1990                 if (errno != ESRCH)
1991                         swork->sw_pidok = 0;
1992                 warn("can't notify %s, pid %d = %s", swork->sw_pidtype,
1993                     (int)swork->sw_pid, swork->sw_fname);
1994         } else {
1995                 if (verbose)
1996                         printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
1997                             (int)swork->sw_pid, swork->sw_fname);
1998                 if (secs > 0) {
1999                         if (verbose)
2000                                 printf("Pause %d second(s) between signals\n",
2001                                     secs);
2002                         sleep(secs);
2003                 }
2004         }
2005 }
2006
2007 static void
2008 do_zipwork(struct zipwork_entry *zwork)
2009 {
2010         const char *pgm_name, *pgm_path;
2011         int errsav, fcount, zstatus;
2012         pid_t pidzip, wpid;
2013         char zresult[MAXPATHLEN];
2014         char command[BUFSIZ];
2015         char **args;
2016         int c;
2017
2018         assert(zwork != NULL);
2019         pgm_path = NULL;
2020         strlcpy(zresult, zwork->zw_fname, sizeof(zresult));
2021         args = calloc(ARGS_NUM, sizeof(*args));
2022         if (args == NULL)
2023                 err(1, "calloc()");
2024         if (zwork->zw_conf != NULL &&
2025             zwork->zw_conf->compress > COMPRESS_NONE)
2026                 for (c = 1; c < COMPRESS_TYPES; c++) {
2027                         if (zwork->zw_conf->compress == c) {
2028                                 pgm_path = compress_type[c].path;
2029                                 (void) strlcat(zresult,
2030                                     compress_type[c].suffix, sizeof(zresult));
2031                                 /* the first argument is always NULL, skip it */
2032                                 for (c = 1; c < ARGS_NUM; c++) {
2033                                         if (compress_type[c].args[c] == NULL)
2034                                                 break;
2035                                         args[c] = compress_type[c].args[c];
2036                                 }
2037                                 break;
2038                         }
2039                 }
2040         if (pgm_path == NULL) {
2041                 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname);
2042                 return;
2043         }
2044         pgm_name = strrchr(pgm_path, '/');
2045         if (pgm_name == NULL)
2046                 pgm_name = pgm_path;
2047         else
2048                 pgm_name++;
2049
2050         args[0] = strdup(pgm_name);
2051         if (args[0] == NULL)
2052                 err(1, "strdup()");
2053         for (c = 0; args[c] != NULL; c++)
2054                 ;
2055         args[c] = zwork->zw_fname;
2056
2057         if (zwork->zw_swork != NULL && zwork->zw_swork->sw_runcmd == 0 &&
2058             zwork->zw_swork->sw_pidok <= 0) {
2059                 warnx(
2060                     "log %s not compressed because daemon(s) not notified",
2061                     zwork->zw_fname);
2062                 change_attrs(zwork->zw_fname, zwork->zw_conf);
2063                 return;
2064         }
2065
2066         strlcpy(command, pgm_path, sizeof(command));
2067         for (c = 1; args[c] != NULL; c++) {
2068                 strlcat(command, " ", sizeof(command));
2069                 strlcat(command, args[c], sizeof(command));
2070         }
2071         if (noaction) {
2072                 printf("\t%s %s\n", pgm_name, zwork->zw_fname);
2073                 change_attrs(zresult, zwork->zw_conf);
2074                 return;
2075         }
2076
2077         if (verbose) {
2078                 printf("Executing: %s\n", command);
2079         }
2080         fcount = 1;
2081         pidzip = fork();
2082         while (pidzip < 0) {
2083                 /*
2084                  * The fork failed.  If the failure was due to a temporary
2085                  * problem, then wait a short time and try it again.
2086                  */
2087                 errsav = errno;
2088                 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname);
2089                 if (errsav != EAGAIN || fcount > 5)
2090                         errx(1, "Exiting...");
2091                 sleep(fcount * 12);
2092                 fcount++;
2093                 pidzip = fork();
2094         }
2095         if (!pidzip) {
2096                 /* The child process executes the compression command */
2097                 execv(pgm_path, (char *const*) args);
2098                 err(1, "execv(`%s')", command);
2099         }
2100
2101         wpid = waitpid(pidzip, &zstatus, 0);
2102         if (wpid == -1) {
2103                 /* XXX - should this be a fatal error? */
2104                 warn("%s: waitpid(%d)", pgm_path, pidzip);
2105                 return;
2106         }
2107         if (!WIFEXITED(zstatus)) {
2108                 warnx("`%s' did not terminate normally", command);
2109                 free(args[0]);
2110                 free(args);
2111                 return;
2112         }
2113         if (WEXITSTATUS(zstatus)) {
2114                 warnx("`%s' terminated with a non-zero status (%d)", command,
2115                     WEXITSTATUS(zstatus));
2116                 free(args[0]);
2117                 free(args);
2118                 return;
2119         }
2120
2121         free(args[0]);
2122         free(args);
2123         /* Compression was successful, set file attributes on the result. */
2124         change_attrs(zresult, zwork->zw_conf);
2125 }
2126
2127 /*
2128  * Save information on any process we need to signal.  Any single
2129  * process may need to be sent different signal-values for different
2130  * log files, but usually a single signal-value will cause the process
2131  * to close and re-open all of its log files.
2132  */
2133 static struct sigwork_entry *
2134 save_sigwork(const struct conf_entry *ent)
2135 {
2136         struct sigwork_entry *sprev, *stmp;
2137         int ndiff;
2138         size_t tmpsiz;
2139
2140         sprev = NULL;
2141         ndiff = 1;
2142         SLIST_FOREACH(stmp, &swhead, sw_nextp) {
2143                 ndiff = strcmp(ent->pid_cmd_file, stmp->sw_fname);
2144                 if (ndiff > 0)
2145                         break;
2146                 if (ndiff == 0) {
2147                         if (ent->sig == stmp->sw_signum)
2148                                 break;
2149                         if (ent->sig > stmp->sw_signum) {
2150                                 ndiff = 1;
2151                                 break;
2152                         }
2153                 }
2154                 sprev = stmp;
2155         }
2156         if (stmp != NULL && ndiff == 0)
2157                 return (stmp);
2158
2159         tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_cmd_file) + 1;
2160         stmp = malloc(tmpsiz);
2161
2162         stmp->sw_runcmd = 0;
2163         /* If this is a command to run we just set the flag and run command */
2164         if (ent->flags & CE_PID2CMD) {
2165                 stmp->sw_pid = -1;
2166                 stmp->sw_pidok = 0;
2167                 stmp->sw_runcmd = 1;
2168         } else {
2169                 set_swpid(stmp, ent);
2170         }
2171         stmp->sw_signum = ent->sig;
2172         strcpy(stmp->sw_fname, ent->pid_cmd_file);
2173         if (sprev == NULL)
2174                 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
2175         else
2176                 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
2177         return (stmp);
2178 }
2179
2180 /*
2181  * Save information on any file we need to compress.  We may see the same
2182  * file multiple times, so check the full list to avoid duplicates.  The
2183  * list itself is sorted smallest-to-largest, because that's the order we
2184  * want to compress the files.  If the partition is very low on disk space,
2185  * then the smallest files are the most likely to compress, and compressing
2186  * them first will free up more space for the larger files.
2187  */
2188 static struct zipwork_entry *
2189 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
2190     int zsize, const char *zipfname)
2191 {
2192         struct zipwork_entry *zprev, *ztmp;
2193         int ndiff;
2194         size_t tmpsiz;
2195
2196         /* Compute the size if the caller did not know it. */
2197         if (zsize < 0)
2198                 zsize = sizefile(zipfname);
2199
2200         zprev = NULL;
2201         ndiff = 1;
2202         SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
2203                 ndiff = strcmp(zipfname, ztmp->zw_fname);
2204                 if (ndiff == 0)
2205                         break;
2206                 if (zsize > ztmp->zw_fsize)
2207                         zprev = ztmp;
2208         }
2209         if (ztmp != NULL && ndiff == 0)
2210                 return (ztmp);
2211
2212         tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
2213         ztmp = malloc(tmpsiz);
2214         ztmp->zw_conf = ent;
2215         ztmp->zw_swork = swork;
2216         ztmp->zw_fsize = zsize;
2217         strcpy(ztmp->zw_fname, zipfname);
2218         if (zprev == NULL)
2219                 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
2220         else
2221                 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
2222         return (ztmp);
2223 }
2224
2225 /* Send a signal to the pid specified by pidfile */
2226 static void
2227 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
2228 {
2229         FILE *f;
2230         long minok, maxok, rval;
2231         char *endp, *linep, line[BUFSIZ];
2232
2233         minok = MIN_PID;
2234         maxok = MAX_PID;
2235         swork->sw_pidok = 0;
2236         swork->sw_pid = 0;
2237         swork->sw_pidtype = "daemon";
2238         if (ent->flags & CE_SIGNALGROUP) {
2239                 /*
2240                  * If we are expected to signal a process-group when
2241                  * rotating this logfile, then the value read in should
2242                  * be the negative of a valid process ID.
2243                  */
2244                 minok = -MAX_PID;
2245                 maxok = -MIN_PID;
2246                 swork->sw_pidtype = "process-group";
2247         }
2248
2249         f = fopen(ent->pid_cmd_file, "r");
2250         if (f == NULL) {
2251                 if (errno == ENOENT && enforcepid == 0) {
2252                         /*
2253                          * Warn if the PID file doesn't exist, but do
2254                          * not consider it an error.  Most likely it
2255                          * means the process has been terminated,
2256                          * so it should be safe to rotate any log
2257                          * files that the process would have been using.
2258                          */
2259                         swork->sw_pidok = 1;
2260                         warnx("pid file doesn't exist: %s", ent->pid_cmd_file);
2261                 } else
2262                         warn("can't open pid file: %s", ent->pid_cmd_file);
2263                 return;
2264         }
2265
2266         if (fgets(line, BUFSIZ, f) == NULL) {
2267                 /*
2268                  * Warn if the PID file is empty, but do not consider
2269                  * it an error.  Most likely it means the process has
2270                  * has terminated, so it should be safe to rotate any
2271                  * log files that the process would have been using.
2272                  */
2273                 if (feof(f) && enforcepid == 0) {
2274                         swork->sw_pidok = 1;
2275                         warnx("pid/cmd file is empty: %s", ent->pid_cmd_file);
2276                 } else
2277                         warn("can't read from pid file: %s", ent->pid_cmd_file);
2278                 (void)fclose(f);
2279                 return;
2280         }
2281         (void)fclose(f);
2282
2283         errno = 0;
2284         linep = line;
2285         while (*linep == ' ')
2286                 linep++;
2287         rval = strtol(linep, &endp, 10);
2288         if (*endp != '\0' && !isspacech(*endp)) {
2289                 warnx("pid file does not start with a valid number: %s",
2290                     ent->pid_cmd_file);
2291         } else if (rval < minok || rval > maxok) {
2292                 warnx("bad value '%ld' for process number in %s",
2293                     rval, ent->pid_cmd_file);
2294                 if (verbose)
2295                         warnx("\t(expecting value between %ld and %ld)",
2296                             minok, maxok);
2297         } else {
2298                 swork->sw_pidok = 1;
2299                 swork->sw_pid = rval;
2300         }
2301
2302         return;
2303 }
2304
2305 /* Log the fact that the logs were turned over */
2306 static int
2307 log_trim(const char *logname, const struct conf_entry *log_ent)
2308 {
2309         FILE *f;
2310         const char *xtra;
2311
2312         if ((f = fopen(logname, "a")) == NULL)
2313                 return (-1);
2314         xtra = "";
2315         if (log_ent->def_cfg)
2316                 xtra = " using <default> rule";
2317         if (log_ent->flags & CE_RFC5424) {
2318                 if (log_ent->firstcreate) {
2319                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s\n",
2320                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2321                             daytime_rfc5424, hostname, getpid(),
2322                             "logfile first created", xtra);
2323                 } else if (log_ent->r_reason != NULL) {
2324                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s%s\n",
2325                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2326                             daytime_rfc5424, hostname, getpid(),
2327                             "logfile turned over", log_ent->r_reason, xtra);
2328                 } else {
2329                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s\n",
2330                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2331                             daytime_rfc5424, hostname, getpid(),
2332                             "logfile turned over", xtra);
2333                 }
2334         } else {
2335                 if (log_ent->firstcreate)
2336                         fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n",
2337                             daytime, hostname, getpid(), xtra);
2338                 else if (log_ent->r_reason != NULL)
2339                         fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n",
2340                             daytime, hostname, getpid(), log_ent->r_reason, xtra);
2341                 else
2342                         fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n",
2343                             daytime, hostname, getpid(), xtra);
2344         }
2345         if (fclose(f) == EOF)
2346                 err(1, "log_trim: fclose");
2347         return (0);
2348 }
2349
2350 /* Return size in kilobytes of a file */
2351 static int
2352 sizefile(const char *file)
2353 {
2354         struct stat sb;
2355
2356         if (stat(file, &sb) < 0)
2357                 return (-1);
2358         return (kbytes(sb.st_size));
2359 }
2360
2361 /*
2362  * Return the mtime of the most recent archive of the logfile, using timestamp
2363  * based filenames.
2364  */
2365 static time_t
2366 mtime_old_timelog(const char *file)
2367 {
2368         struct stat sb;
2369         struct tm tm;
2370         int dir_fd;
2371         time_t t;
2372         struct dirent *dp;
2373         DIR *dirp;
2374         char *logfname, *logfnamebuf, *dir, *dirbuf;
2375
2376         t = -1;
2377
2378         if ((dirbuf = strdup(file)) == NULL) {
2379                 warn("strdup() of '%s'", file);
2380                 return (t);
2381         }
2382         dir = dirname(dirbuf);
2383         if ((logfnamebuf = strdup(file)) == NULL) {
2384                 warn("strdup() of '%s'", file);
2385                 free(dirbuf);
2386                 return (t);
2387         }
2388         logfname = basename(logfnamebuf);
2389         if (logfname[0] == '/') {
2390                 warnx("Invalid log filename '%s'", logfname);
2391                 goto out;
2392         }
2393
2394         if ((dirp = opendir(dir)) == NULL) {
2395                 warn("Cannot open log directory '%s'", dir);
2396                 goto out;
2397         }
2398         dir_fd = dirfd(dirp);
2399         /* Open the archive dir and find the most recent archive of logfname. */
2400         while ((dp = readdir(dirp)) != NULL) {
2401                 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0)
2402                         continue;
2403
2404                 if (fstatat(dir_fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) == -1) {
2405                         warn("Cannot stat '%s'", file);
2406                         continue;
2407                 }
2408                 if (t < sb.st_mtime)
2409                         t = sb.st_mtime;
2410         }
2411         closedir(dirp);
2412
2413 out:
2414         free(dirbuf);
2415         free(logfnamebuf);
2416         return (t);
2417 }
2418
2419 /* Return the age in hours of the most recent archive of the logfile. */
2420 static int
2421 age_old_log(const char *file)
2422 {
2423         struct stat sb;
2424         const char *logfile_suffix;
2425         char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1];
2426         time_t mtime;
2427
2428         if (archtodir) {
2429                 char *p;
2430
2431                 /* build name of archive directory into tmp */
2432                 if (*archdirname == '/') {      /* absolute */
2433                         strlcpy(tmp, archdirname, sizeof(tmp));
2434                 } else {        /* relative */
2435                         /* get directory part of logfile */
2436                         strlcpy(tmp, file, sizeof(tmp));
2437                         if ((p = strrchr(tmp, '/')) == NULL)
2438                                 tmp[0] = '\0';
2439                         else
2440                                 *(p + 1) = '\0';
2441                         strlcat(tmp, archdirname, sizeof(tmp));
2442                 }
2443
2444                 strlcat(tmp, "/", sizeof(tmp));
2445
2446                 /* get filename part of logfile */
2447                 if ((p = strrchr(file, '/')) == NULL)
2448                         strlcat(tmp, file, sizeof(tmp));
2449                 else
2450                         strlcat(tmp, p + 1, sizeof(tmp));
2451         } else {
2452                 (void) strlcpy(tmp, file, sizeof(tmp));
2453         }
2454
2455         if (timefnamefmt != NULL) {
2456                 mtime = mtime_old_timelog(tmp);
2457                 if (mtime == -1)
2458                         return (-1);
2459         } else {
2460                 strlcat(tmp, ".0", sizeof(tmp));
2461                 logfile_suffix = get_logfile_suffix(tmp);
2462                 if (logfile_suffix == NULL)
2463                         return (-1);
2464                 (void) strlcat(tmp, logfile_suffix, sizeof(tmp));
2465                 if (stat(tmp, &sb) < 0)
2466                         return (-1);
2467                 mtime = sb.st_mtime;
2468         }
2469
2470         return ((int)(ptimeget_secs(timenow) - mtime + 1800) / 3600);
2471 }
2472
2473 /* Skip Over Blanks */
2474 static char *
2475 sob(char *p)
2476 {
2477         while (p && *p && isspace(*p))
2478                 p++;
2479         return (p);
2480 }
2481
2482 /* Skip Over Non-Blanks */
2483 static char *
2484 son(char *p)
2485 {
2486         while (p && *p && !isspace(*p))
2487                 p++;
2488         return (p);
2489 }
2490
2491 /* Check if string is actually a number */
2492 static int
2493 isnumberstr(const char *string)
2494 {
2495         while (*string) {
2496                 if (!isdigitch(*string++))
2497                         return (0);
2498         }
2499         return (1);
2500 }
2501
2502 /* Check if string contains a glob */
2503 static int
2504 isglobstr(const char *string)
2505 {
2506         char chr;
2507
2508         while ((chr = *string++)) {
2509                 if (chr == '*' || chr == '?' || chr == '[')
2510                         return (1);
2511         }
2512         return (0);
2513 }
2514
2515 /*
2516  * Save the active log file under a new name.  A link to the new name
2517  * is the quick-and-easy way to do this.  If that fails (which it will
2518  * if the destination is on another partition), then make a copy of
2519  * the file to the new location.
2520  */
2521 static void
2522 savelog(char *from, char *to)
2523 {
2524         FILE *src, *dst;
2525         int c, res;
2526
2527         res = link(from, to);
2528         if (res == 0)
2529                 return;
2530
2531         if ((src = fopen(from, "r")) == NULL)
2532                 err(1, "can't fopen %s for reading", from);
2533         if ((dst = fopen(to, "w")) == NULL)
2534                 err(1, "can't fopen %s for writing", to);
2535
2536         while ((c = getc(src)) != EOF) {
2537                 if ((putc(c, dst)) == EOF)
2538                         err(1, "error writing to %s", to);
2539         }
2540
2541         if (ferror(src))
2542                 err(1, "error reading from %s", from);
2543         if ((fclose(src)) != 0)
2544                 err(1, "can't fclose %s", to);
2545         if ((fclose(dst)) != 0)
2546                 err(1, "can't fclose %s", from);
2547 }
2548
2549 /* create one or more directory components of a path */
2550 static void
2551 createdir(const struct conf_entry *ent, char *dirpart)
2552 {
2553         int res;
2554         char *s, *d;
2555         char mkdirpath[MAXPATHLEN];
2556         struct stat st;
2557
2558         s = dirpart;
2559         d = mkdirpath;
2560
2561         for (;;) {
2562                 *d++ = *s++;
2563                 if (*s != '/' && *s != '\0')
2564                         continue;
2565                 *d = '\0';
2566                 res = lstat(mkdirpath, &st);
2567                 if (res != 0) {
2568                         if (noaction) {
2569                                 printf("\tmkdir %s\n", mkdirpath);
2570                         } else {
2571                                 res = mkdir(mkdirpath, 0755);
2572                                 if (res != 0)
2573                                         err(1, "Error on mkdir(\"%s\") for -a",
2574                                             mkdirpath);
2575                         }
2576                 }
2577                 if (*s == '\0')
2578                         break;
2579         }
2580         if (verbose) {
2581                 if (ent->firstcreate)
2582                         printf("Created directory '%s' for new %s\n",
2583                             dirpart, ent->log);
2584                 else
2585                         printf("Created directory '%s' for -a\n", dirpart);
2586         }
2587 }
2588
2589 /*
2590  * Create a new log file, destroying any currently-existing version
2591  * of the log file in the process.  If the caller wants a backup copy
2592  * of the file to exist, they should call 'link(logfile,logbackup)'
2593  * before calling this routine.
2594  */
2595 void
2596 createlog(const struct conf_entry *ent)
2597 {
2598         int fd, failed;
2599         struct stat st;
2600         char *realfile, *slash, tempfile[MAXPATHLEN];
2601
2602         fd = -1;
2603         realfile = ent->log;
2604
2605         /*
2606          * If this log file is being created for the first time (-C option),
2607          * then it may also be true that the parent directory does not exist
2608          * yet.  Check, and create that directory if it is missing.
2609          */
2610         if (ent->firstcreate) {
2611                 strlcpy(tempfile, realfile, sizeof(tempfile));
2612                 slash = strrchr(tempfile, '/');
2613                 if (slash != NULL) {
2614                         *slash = '\0';
2615                         failed = stat(tempfile, &st);
2616                         if (failed && errno != ENOENT)
2617                                 err(1, "Error on stat(%s)", tempfile);
2618                         if (failed)
2619                                 createdir(ent, tempfile);
2620                         else if (!S_ISDIR(st.st_mode))
2621                                 errx(1, "%s exists but is not a directory",
2622                                     tempfile);
2623                 }
2624         }
2625
2626         /*
2627          * First create an unused filename, so it can be chown'ed and
2628          * chmod'ed before it is moved into the real location.  mkstemp
2629          * will create the file mode=600 & owned by us.  Note that all
2630          * temp files will have a suffix of '.z<something>'.
2631          */
2632         strlcpy(tempfile, realfile, sizeof(tempfile));
2633         strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2634         if (noaction)
2635                 printf("\tmktemp %s\n", tempfile);
2636         else {
2637                 fd = mkstemp(tempfile);
2638                 if (fd < 0)
2639                         err(1, "can't mkstemp logfile %s", tempfile);
2640
2641                 /*
2642                  * Add status message to what will become the new log file.
2643                  */
2644                 if (!(ent->flags & CE_BINARY)) {
2645                         if (log_trim(tempfile, ent))
2646                                 err(1, "can't add status message to log");
2647                 }
2648         }
2649
2650         /* Change the owner/group, if we are supposed to */
2651         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2652                 if (noaction)
2653                         printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2654                             tempfile);
2655                 else {
2656                         failed = fchown(fd, ent->uid, ent->gid);
2657                         if (failed)
2658                                 err(1, "can't fchown temp file %s", tempfile);
2659                 }
2660         }
2661
2662         /* Turn on NODUMP if it was requested in the config-file. */
2663         if (ent->flags & CE_NODUMP) {
2664                 if (noaction)
2665                         printf("\tchflags nodump %s\n", tempfile);
2666                 else {
2667                         failed = fchflags(fd, UF_NODUMP);
2668                         if (failed) {
2669                                 warn("log_trim: fchflags(NODUMP)");
2670                         }
2671                 }
2672         }
2673
2674         /*
2675          * Note that if the real logfile still exists, and if the call
2676          * to rename() fails, then "neither the old file nor the new
2677          * file shall be changed or created" (to quote the standard).
2678          * If the call succeeds, then the file will be replaced without
2679          * any window where some other process might find that the file
2680          * did not exist.
2681          * XXX - ? It may be that for some error conditions, we could
2682          *      retry by first removing the realfile and then renaming.
2683          */
2684         if (noaction) {
2685                 printf("\tchmod %o %s\n", ent->permissions, tempfile);
2686                 printf("\tmv %s %s\n", tempfile, realfile);
2687         } else {
2688                 failed = fchmod(fd, ent->permissions);
2689                 if (failed)
2690                         err(1, "can't fchmod temp file '%s'", tempfile);
2691                 failed = rename(tempfile, realfile);
2692                 if (failed)
2693                         err(1, "can't mv %s to %s", tempfile, realfile);
2694         }
2695
2696         if (fd >= 0)
2697                 close(fd);
2698 }
2699
2700 /*
2701  * Change the attributes of a given filename to what was specified in
2702  * the newsyslog.conf entry.  This routine is only called for files
2703  * that newsyslog expects that it has created, and thus it is a fatal
2704  * error if this routine finds that the file does not exist.
2705  */
2706 static void
2707 change_attrs(const char *fname, const struct conf_entry *ent)
2708 {
2709         int failed;
2710
2711         if (noaction) {
2712                 printf("\tchmod %o %s\n", ent->permissions, fname);
2713
2714                 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2715                         printf("\tchown %u:%u %s\n",
2716                             ent->uid, ent->gid, fname);
2717
2718                 if (ent->flags & CE_NODUMP)
2719                         printf("\tchflags nodump %s\n", fname);
2720                 return;
2721         }
2722
2723         failed = chmod(fname, ent->permissions);
2724         if (failed) {
2725                 if (errno != EPERM)
2726                         err(1, "chmod(%s) in change_attrs", fname);
2727                 warn("change_attrs couldn't chmod(%s)", fname);
2728         }
2729
2730         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2731                 failed = chown(fname, ent->uid, ent->gid);
2732                 if (failed)
2733                         warn("can't chown %s", fname);
2734         }
2735
2736         if (ent->flags & CE_NODUMP) {
2737                 failed = chflags(fname, UF_NODUMP);
2738                 if (failed)
2739                         warn("can't chflags %s NODUMP", fname);
2740         }
2741 }
2742
2743 /*
2744  * Parse a signal number or signal name. Returns the signal number parsed or -1
2745  * on failure.
2746  */
2747 static int
2748 parse_signal(const char *str)
2749 {
2750         int sig, i;
2751         const char *errstr;
2752
2753         sig = strtonum(str, 1, sys_nsig - 1, &errstr);
2754
2755         if (errstr == NULL)
2756                 return (sig);
2757         if (strncasecmp(str, "SIG", 3) == 0)
2758                 str += 3;
2759
2760         for (i = 1; i < sys_nsig; i++) {
2761                 if (strcasecmp(str, sys_signame[i]) == 0)
2762                         return (i);
2763         }
2764
2765         return (-1);
2766 }