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 #define COMPRESS_SUFFIX_MAXLEN  MAX(MAX(sizeof(COMPRESS_SUFFIX_GZ),sizeof(COMPRESS_SUFFIX_BZ2)),sizeof(COMPRESS_SUFFIX_XZ))
 105
 106 /*
 107  * Compression types
 108  */
 109 #define COMPRESS_TYPES  4       /* Number of supported compression types */
 110
 111 #define COMPRESS_NONE   0
 112 #define COMPRESS_GZIP   1
 113 #define COMPRESS_BZIP2  2
 114 #define COMPRESS_XZ     3
 115
 116 /*
 117  * Bit-values for the 'flags' parsed from a config-file entry.
 118  */
 119 #define CE_BINARY       0x0008  /* Logfile is in binary, do not add status */
 120                                 /*    messages to logfile(s) when rotating. */
 121 #define CE_NOSIGNAL     0x0010  /* There is no process to signal when */
 122                                 /*    trimming this file. */
 123 #define CE_TRIMAT       0x0020  /* trim file at a specific time. */
 124 #define CE_GLOB         0x0040  /* name of the log is file name pattern. */
 125 #define CE_SIGNALGROUP  0x0080  /* Signal a process-group instead of a single */
 126                                 /*    process when trimming this file. */
 127 #define CE_CREATE       0x0100  /* Create the log file if it does not exist. */
 128 #define CE_NODUMP       0x0200  /* Set 'nodump' on newly created log file. */
 129 #define CE_PID2CMD      0x0400  /* Replace PID file with a shell command.*/
 130
 131 #define CE_RFC5424      0x0800  /* Use RFC5424 format rotation message */
 132
 133 #define MIN_PID         5       /* Don't touch pids lower than this */
 134 #define MAX_PID         99999   /* was lower, see /usr/include/sys/proc.h */
 135
 136 #define kbytes(size)  (((size) + 1023) >> 10)
 137
 138 #define DEFAULT_MARKER  "<default>"
 139 #define DEBUG_MARKER    "<debug>"
 140 #define INCLUDE_MARKER  "<include>"
 141 #define DEFAULT_TIMEFNAME_FMT   "%Y%m%dT%H%M%S"
 142
 143 #define MAX_OLDLOGS 65536       /* Default maximum number of old logfiles */
 144
 145 struct compress_types {
 146         const char *flag;       /* Flag in configuration file */
 147         const char *suffix;     /* Compression suffix */
 148         const char *path;       /* Path to compression program */
 149 };
 150
 151 static const struct compress_types compress_type[COMPRESS_TYPES] = {
 152         { "", "", "" },                                 /* no compression */
 153         { "Z", COMPRESS_SUFFIX_GZ, _PATH_GZIP },        /* gzip compression */
 154         { "J", COMPRESS_SUFFIX_BZ2, _PATH_BZIP2 },      /* bzip2 compression */
 155         { "X", COMPRESS_SUFFIX_XZ, _PATH_XZ }           /* xz compression */
 156 };
 157
 158 struct conf_entry {
 159         STAILQ_ENTRY(conf_entry) cf_nextp;
 160         char *log;              /* Name of the log */
 161         char *pid_cmd_file;             /* PID or command file */
 162         char *r_reason;         /* The reason this file is being rotated */
 163         int firstcreate;        /* Creating log for the first time (-C). */
 164         int rotate;             /* Non-zero if this file should be rotated */
 165         int fsize;              /* size found for the log file */
 166         uid_t uid;              /* Owner of log */
 167         gid_t gid;              /* Group of log */
 168         int numlogs;            /* Number of logs to keep */
 169         int trsize;             /* Size cutoff to trigger trimming the log */
 170         int hours;              /* Hours between log trimming */
 171         struct ptime_data *trim_at;     /* Specific time to do trimming */
 172         unsigned int permissions;       /* File permissions on the log */
 173         int flags;              /* CE_BINARY */
 174         int compress;           /* Compression */
 175         int sig;                /* Signal to send */
 176         int def_cfg;            /* Using the <default> rule for this file */
 177 };
 178
 179 struct sigwork_entry {
 180         SLIST_ENTRY(sigwork_entry) sw_nextp;
 181         int      sw_signum;             /* the signal to send */
 182         int      sw_pidok;              /* true if pid value is valid */
 183         pid_t    sw_pid;                /* the process id from the PID file */
 184         const char *sw_pidtype;         /* "daemon" or "process group" */
 185         int      sw_runcmd;             /* run command or send PID to signal */
 186         char     sw_fname[1];           /* file the PID was read from or shell cmd */
 187 };
 188
 189 struct zipwork_entry {
 190         SLIST_ENTRY(zipwork_entry) zw_nextp;
 191         const struct conf_entry *zw_conf;       /* for chown/perm/flag info */
 192         const struct sigwork_entry *zw_swork;   /* to know success of signal */
 193         int      zw_fsize;              /* size of the file to compress */
 194         char     zw_fname[1];           /* the file to compress */
 195 };
 196
 197 struct include_entry {
 198         STAILQ_ENTRY(include_entry) inc_nextp;
 199         const char *file;       /* Name of file to process */
 200 };
 201
 202 struct oldlog_entry {
 203         char *fname;            /* Filename of the log file */
 204         time_t t;               /* Parsed timestamp of the logfile */
 205 };
 206
 207 typedef enum {
 208         FREE_ENT, KEEP_ENT
 209 }       fk_entry;
 210
 211 STAILQ_HEAD(cflist, conf_entry);
 212 static SLIST_HEAD(swlisthead, sigwork_entry) swhead =
 213     SLIST_HEAD_INITIALIZER(swhead);
 214 static SLIST_HEAD(zwlisthead, zipwork_entry) zwhead =
 215     SLIST_HEAD_INITIALIZER(zwhead);
 216 STAILQ_HEAD(ilist, include_entry);
 217
 218 int dbg_at_times;               /* -D Show details of 'trim_at' code */
 219
 220 static int archtodir = 0;       /* Archive old logfiles to other directory */
 221 static int createlogs;          /* Create (non-GLOB) logfiles which do not */
 222                                 /*    already exist.  1=='for entries with */
 223                                 /*    C flag', 2=='for all entries'. */
 224 int verbose = 0;                /* Print out what's going on */
 225 static int needroot = 1;        /* Root privs are necessary */
 226 int noaction = 0;               /* Don't do anything, just show it */
 227 static int norotate = 0;        /* Don't rotate */
 228 static int nosignal;            /* Do not send any signals */
 229 static int enforcepid = 0;      /* If PID file does not exist or empty, do nothing */
 230 static int force = 0;           /* Force the trim no matter what */
 231 static int rotatereq = 0;       /* -R = Always rotate the file(s) as given */
 232                                 /*    on the command (this also requires   */
 233                                 /*    that a list of files *are* given on  */
 234                                 /*    the run command). */
 235 static char *requestor;         /* The name given on a -R request */
 236 static char *timefnamefmt = NULL;/* Use time based filenames instead of .0 */
 237 static char *archdirname;       /* Directory path to old logfiles archive */
 238 static char *destdir = NULL;    /* Directory to treat at root for logs */
 239 static const char *conf;        /* Configuration file to use */
 240
 241 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */
 242 static struct ptime_data *timenow; /* The time to use for checking at-fields */
 243
 244 #define DAYTIME_LEN     16
 245 static char daytime[DAYTIME_LEN];/* The current time in human readable form,
 246                                   * used for rotation-tracking messages. */
 247
 248 /* Another buffer to hold the current time in RFC5424 format. Fractional
 249  * seconds are allowed by the RFC, but are not included in the
 250  * rotation-tracking messages written by newsyslog and so are not accounted for
 251  * in the length below.
 252  */
 253 #define DAYTIME_RFC5424_LEN     sizeof("YYYY-MM-DDTHH:MM:SS+00:00")
 254 static char daytime_rfc5424[DAYTIME_RFC5424_LEN];
 255
 256 static char hostname[MAXHOSTNAMELEN]; /* hostname */
 257
 258 static const char *path_syslogpid = _PATH_SYSLOGPID;
 259
 260 static struct cflist *get_worklist(char **files);
 261 static void parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
 262                     struct conf_entry **defconf, struct ilist *inclist);
 263 static void add_to_queue(const char *fname, struct ilist *inclist);
 264 static char *sob(char *p);
 265 static char *son(char *p);
 266 static int isnumberstr(const char *);
 267 static int isglobstr(const char *);
 268 static char *missing_field(char *p, char *errline);
 269 static void      change_attrs(const char *, const struct conf_entry *);
 270 static const char *get_logfile_suffix(const char *logfile);
 271 static fk_entry  do_entry(struct conf_entry *);
 272 static fk_entry  do_rotate(const struct conf_entry *);
 273 static void      do_sigwork(struct sigwork_entry *);
 274 static void      do_zipwork(struct zipwork_entry *);
 275 static struct sigwork_entry *
 276                  save_sigwork(const struct conf_entry *);
 277 static struct zipwork_entry *
 278                  save_zipwork(const struct conf_entry *, const struct
 279                     sigwork_entry *, int, const char *);
 280 static void      set_swpid(struct sigwork_entry *, const struct conf_entry *);
 281 static int       sizefile(const char *);
 282 static void expand_globs(struct cflist *work_p, struct cflist *glob_p);
 283 static void free_clist(struct cflist *list);
 284 static void free_entry(struct conf_entry *ent);
 285 static struct conf_entry *init_entry(const char *fname,
 286                 struct conf_entry *src_entry);
 287 static void parse_args(int argc, char **argv);
 288 static int parse_doption(const char *doption);
 289 static void usage(void);
 290 static int log_trim(const char *logname, const struct conf_entry *log_ent);
 291 static int age_old_log(const char *file);
 292 static void savelog(char *from, char *to);
 293 static void createdir(const struct conf_entry *ent, char *dirpart);
 294 static void createlog(const struct conf_entry *ent);
 295 static int parse_signal(const char *str);
 296
 297 /*
 298  * All the following take a parameter of 'int', but expect values in the
 299  * range of unsigned char.  Define wrappers which take values of type 'char',
 300  * whether signed or unsigned, and ensure they end up in the right range.
 301  */
 302 #define isdigitch(Anychar) isdigit((u_char)(Anychar))
 303 #define isprintch(Anychar) isprint((u_char)(Anychar))
 304 #define isspacech(Anychar) isspace((u_char)(Anychar))
 305 #define tolowerch(Anychar) tolower((u_char)(Anychar))
 306
 307 int
 308 main(int argc, char **argv)
 309 {
 310         struct cflist *worklist;
 311         struct conf_entry *p;
 312         struct sigwork_entry *stmp;
 313         struct zipwork_entry *ztmp;
 314
 315         SLIST_INIT(&swhead);
 316         SLIST_INIT(&zwhead);
 317
 318         parse_args(argc, argv);
 319         argc -= optind;
 320         argv += optind;
 321
 322         if (needroot && getuid() && geteuid())
 323                 errx(1, "must have root privs");
 324         worklist = get_worklist(argv);
 325
 326         /*
 327          * Rotate all the files which need to be rotated.  Note that
 328          * some users have *hundreds* of entries in newsyslog.conf!
 329          */
 330         while (!STAILQ_EMPTY(worklist)) {
 331                 p = STAILQ_FIRST(worklist);
 332                 STAILQ_REMOVE_HEAD(worklist, cf_nextp);
 333                 if (do_entry(p) == FREE_ENT)
 334                         free_entry(p);
 335         }
 336
 337         /*
 338          * Send signals to any processes which need a signal to tell
 339          * them to close and re-open the log file(s) we have rotated.
 340          * Note that zipwork_entries include pointers to these
 341          * sigwork_entry's, so we can not free the entries here.
 342          */
 343         if (!SLIST_EMPTY(&swhead)) {
 344                 if (noaction || verbose)
 345                         printf("Signal all daemon process(es)...\n");
 346                 SLIST_FOREACH(stmp, &swhead, sw_nextp)
 347                         do_sigwork(stmp);
 348                 if (!(rotatereq && nosignal)) {
 349                         if (noaction)
 350                                 printf("\tsleep 10\n");
 351                         else {
 352                                 if (verbose)
 353                                         printf("Pause 10 seconds to allow "
 354                                             "daemon(s) to close log file(s)\n");
 355                                 sleep(10);
 356                         }
 357                 }
 358         }
 359         /*
 360          * Compress all files that we're expected to compress, now
 361          * that all processes should have closed the files which
 362          * have been rotated.
 363          */
 364         if (!SLIST_EMPTY(&zwhead)) {
 365                 if (noaction || verbose)
 366                         printf("Compress all rotated log file(s)...\n");
 367                 while (!SLIST_EMPTY(&zwhead)) {
 368                         ztmp = SLIST_FIRST(&zwhead);
 369                         do_zipwork(ztmp);
 370                         SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
 371                         free(ztmp);
 372                 }
 373         }
 374         /* Now free all the sigwork entries. */
 375         while (!SLIST_EMPTY(&swhead)) {
 376                 stmp = SLIST_FIRST(&swhead);
 377                 SLIST_REMOVE_HEAD(&swhead, sw_nextp);
 378                 free(stmp);
 379         }
 380
 381         while (wait(NULL) > 0 || errno == EINTR)
 382                 ;
 383         return (0);
 384 }
 385
 386 static struct conf_entry *
 387 init_entry(const char *fname, struct conf_entry *src_entry)
 388 {
 389         struct conf_entry *tempwork;
 390
 391         if (verbose > 4)
 392                 printf("\t--> [creating entry for %s]\n", fname);
 393
 394         tempwork = malloc(sizeof(struct conf_entry));
 395         if (tempwork == NULL)
 396                 err(1, "malloc of conf_entry for %s", fname);
 397
 398         if (destdir == NULL || fname[0] != '/')
 399                 tempwork->log = strdup(fname);
 400         else
 401                 asprintf(&tempwork->log, "%s%s", destdir, fname);
 402         if (tempwork->log == NULL)
 403                 err(1, "strdup for %s", fname);
 404
 405         if (src_entry != NULL) {
 406                 tempwork->pid_cmd_file = NULL;
 407                 if (src_entry->pid_cmd_file)
 408                         tempwork->pid_cmd_file = strdup(src_entry->pid_cmd_file);
 409                 tempwork->r_reason = NULL;
 410                 tempwork->firstcreate = 0;
 411                 tempwork->rotate = 0;
 412                 tempwork->fsize = -1;
 413                 tempwork->uid = src_entry->uid;
 414                 tempwork->gid = src_entry->gid;
 415                 tempwork->numlogs = src_entry->numlogs;
 416                 tempwork->trsize = src_entry->trsize;
 417                 tempwork->hours = src_entry->hours;
 418                 tempwork->trim_at = NULL;
 419                 if (src_entry->trim_at != NULL)
 420                         tempwork->trim_at = ptime_init(src_entry->trim_at);
 421                 tempwork->permissions = src_entry->permissions;
 422                 tempwork->flags = src_entry->flags;
 423                 tempwork->compress = src_entry->compress;
 424                 tempwork->sig = src_entry->sig;
 425                 tempwork->def_cfg = src_entry->def_cfg;
 426         } else {
 427                 /* Initialize as a "do-nothing" entry */
 428                 tempwork->pid_cmd_file = NULL;
 429                 tempwork->r_reason = NULL;
 430                 tempwork->firstcreate = 0;
 431                 tempwork->rotate = 0;
 432                 tempwork->fsize = -1;
 433                 tempwork->uid = (uid_t)-1;
 434                 tempwork->gid = (gid_t)-1;
 435                 tempwork->numlogs = 1;
 436                 tempwork->trsize = -1;
 437                 tempwork->hours = -1;
 438                 tempwork->trim_at = NULL;
 439                 tempwork->permissions = 0;
 440                 tempwork->flags = 0;
 441                 tempwork->compress = COMPRESS_NONE;
 442                 tempwork->sig = SIGHUP;
 443                 tempwork->def_cfg = 0;
 444         }
 445
 446         return (tempwork);
 447 }
 448
 449 static void
 450 free_entry(struct conf_entry *ent)
 451 {
 452
 453         if (ent == NULL)
 454                 return;
 455
 456         if (ent->log != NULL) {
 457                 if (verbose > 4)
 458                         printf("\t--> [freeing entry for %s]\n", ent->log);
 459                 free(ent->log);
 460                 ent->log = NULL;
 461         }
 462
 463         if (ent->pid_cmd_file != NULL) {
 464                 free(ent->pid_cmd_file);
 465                 ent->pid_cmd_file = NULL;
 466         }
 467
 468         if (ent->r_reason != NULL) {
 469                 free(ent->r_reason);
 470                 ent->r_reason = NULL;
 471         }
 472
 473         if (ent->trim_at != NULL) {
 474                 ptime_free(ent->trim_at);
 475                 ent->trim_at = NULL;
 476         }
 477
 478         free(ent);
 479 }
 480
 481 static void
 482 free_clist(struct cflist *list)
 483 {
 484         struct conf_entry *ent;
 485
 486         while (!STAILQ_EMPTY(list)) {
 487                 ent = STAILQ_FIRST(list);
 488                 STAILQ_REMOVE_HEAD(list, cf_nextp);
 489                 free_entry(ent);
 490         }
 491
 492         free(list);
 493         list = NULL;
 494 }
 495
 496 static fk_entry
 497 do_entry(struct conf_entry * ent)
 498 {
 499 #define REASON_MAX      80
 500         int modtime;
 501         fk_entry free_or_keep;
 502         double diffsecs;
 503         char temp_reason[REASON_MAX];
 504         int oversized;
 505
 506         free_or_keep = FREE_ENT;
 507         if (verbose)
 508                 printf("%s <%d%s>: ", ent->log, ent->numlogs,
 509                     compress_type[ent->compress].flag);
 510         ent->fsize = sizefile(ent->log);
 511         oversized = ((ent->trsize > 0) && (ent->fsize >= ent->trsize));
 512         modtime = age_old_log(ent->log);
 513         ent->rotate = 0;
 514         ent->firstcreate = 0;
 515         if (ent->fsize < 0) {
 516                 /*
 517                  * If either the C flag or the -C option was specified,
 518                  * and if we won't be creating the file, then have the
 519                  * verbose message include a hint as to why the file
 520                  * will not be created.
 521                  */
 522                 temp_reason[0] = '\0';
 523                 if (createlogs > 1)
 524                         ent->firstcreate = 1;
 525                 else if ((ent->flags & CE_CREATE) && createlogs)
 526                         ent->firstcreate = 1;
 527                 else if (ent->flags & CE_CREATE)
 528                         strlcpy(temp_reason, " (no -C option)", REASON_MAX);
 529                 else if (createlogs)
 530                         strlcpy(temp_reason, " (no C flag)", REASON_MAX);
 531
 532                 if (ent->firstcreate) {
 533                         if (verbose)
 534                                 printf("does not exist -> will create.\n");
 535                         createlog(ent);
 536                 } else if (verbose) {
 537                         printf("does not exist, skipped%s.\n", temp_reason);
 538                 }
 539         } else {
 540                 if (ent->flags & CE_TRIMAT && !force && !rotatereq &&
 541                     !oversized) {
 542                         diffsecs = ptimeget_diff(timenow, ent->trim_at);
 543                         if (diffsecs < 0.0) {
 544                                 /* trim_at is some time in the future. */
 545                                 if (verbose) {
 546                                         ptime_adjust4dst(ent->trim_at,
 547                                             timenow);
 548                                         printf("--> will trim at %s",
 549                                             ptimeget_ctime(ent->trim_at));
 550                                 }
 551                                 return (free_or_keep);
 552                         } else if (diffsecs >= 3600.0) {
 553                                 /*
 554                                  * trim_at is more than an hour in the past,
 555                                  * so find the next valid trim_at time, and
 556                                  * tell the user what that will be.
 557                                  */
 558                                 if (verbose && dbg_at_times)
 559                                         printf("\n\t--> prev trim at %s\t",
 560                                             ptimeget_ctime(ent->trim_at));
 561                                 if (verbose) {
 562                                         ptimeset_nxtime(ent->trim_at);
 563                                         printf("--> will trim at %s",
 564                                             ptimeget_ctime(ent->trim_at));
 565                                 }
 566                                 return (free_or_keep);
 567                         } else if (verbose && noaction && dbg_at_times) {
 568                                 /*
 569                                  * If we are just debugging at-times, then
 570                                  * a detailed message is helpful.  Also
 571                                  * skip "doing" any commands, since they
 572                                  * would all be turned off by no-action.
 573                                  */
 574                                 printf("\n\t--> timematch at %s",
 575                                     ptimeget_ctime(ent->trim_at));
 576                                 return (free_or_keep);
 577                         } else if (verbose && ent->hours <= 0) {
 578                                 printf("--> time is up\n");
 579                         }
 580                 }
 581                 if (verbose && (ent->trsize > 0))
 582                         printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
 583                 if (verbose && (ent->hours > 0))
 584                         printf(" age (hr): %d [%d] ", modtime, ent->hours);
 585
 586                 /*
 587                  * Figure out if this logfile needs to be rotated.
 588                  */
 589                 temp_reason[0] = '\0';
 590                 if (rotatereq) {
 591                         ent->rotate = 1;
 592                         snprintf(temp_reason, REASON_MAX, " due to -R from %s",
 593                             requestor);
 594                 } else if (force) {
 595                         ent->rotate = 1;
 596                         snprintf(temp_reason, REASON_MAX, " due to -F request");
 597                 } else if (oversized) {
 598                         ent->rotate = 1;
 599                         snprintf(temp_reason, REASON_MAX, " due to size>%dK",
 600                             ent->trsize);
 601                 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
 602                         ent->rotate = 1;
 603                 } else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
 604                     (modtime < 0))) {
 605                         ent->rotate = 1;
 606                 }
 607
 608                 /*
 609                  * If the file needs to be rotated, then rotate it.
 610                  */
 611                 if (ent->rotate && !norotate) {
 612                         if (temp_reason[0] != '\0')
 613                                 ent->r_reason = strdup(temp_reason);
 614                         if (verbose)
 615                                 printf("--> trimming log....\n");
 616                         if (noaction && !verbose)
 617                                 printf("%s <%d%s>: trimming\n", ent->log,
 618                                     ent->numlogs,
 619                                     compress_type[ent->compress].flag);
 620                         free_or_keep = do_rotate(ent);
 621                 } else {
 622                         if (verbose)
 623                                 printf("--> skipping\n");
 624                 }
 625         }
 626         return (free_or_keep);
 627 #undef REASON_MAX
 628 }
 629
 630 static void
 631 parse_args(int argc, char **argv)
 632 {
 633         int ch;
 634         char *p;
 635
 636         timenow = ptime_init(NULL);
 637         ptimeset_time(timenow, time(NULL));
 638         strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN);
 639         ptimeget_ctime_rfc5424(timenow, daytime_rfc5424, DAYTIME_RFC5424_LEN);
 640
 641         /* Let's get our hostname */
 642         (void)gethostname(hostname, sizeof(hostname));
 643
 644         /* Truncate domain */
 645         if ((p = strchr(hostname, '.')) != NULL)
 646                 *p = '\0';
 647
 648         /* Parse command line options. */
 649         while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1)
 650                 switch (ch) {
 651                 case 'a':
 652                         archtodir++;
 653                         archdirname = optarg;
 654                         break;
 655                 case 'd':
 656                         destdir = optarg;
 657                         break;
 658                 case 'f':
 659                         conf = optarg;
 660                         break;
 661                 case 'n':
 662                         noaction++;
 663                         /* FALLTHROUGH */
 664                 case 'r':
 665                         needroot = 0;
 666                         break;
 667                 case 's':
 668                         nosignal = 1;
 669                         break;
 670                 case 't':
 671                         if (optarg[0] == '\0' ||
 672                             strcmp(optarg, "DEFAULT") == 0)
 673                                 timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT);
 674                         else
 675                                 timefnamefmt = strdup(optarg);
 676                         break;
 677                 case 'v':
 678                         verbose++;
 679                         break;
 680                 case 'C':
 681                         /* Useful for things like rc.diskless... */
 682                         createlogs++;
 683                         break;
 684                 case 'D':
 685                         /*
 686                          * Set some debugging option.  The specific option
 687                          * depends on the value of optarg.  These options
 688                          * may come and go without notice or documentation.
 689                          */
 690                         if (parse_doption(optarg))
 691                                 break;
 692                         usage();
 693                         /* NOTREACHED */
 694                 case 'F':
 695                         force++;
 696                         break;
 697                 case 'N':
 698                         norotate++;
 699                         break;
 700                 case 'P':
 701                         enforcepid++;
 702                         break;
 703                 case 'R':
 704                         rotatereq++;
 705                         requestor = strdup(optarg);
 706                         break;
 707                 case 'S':
 708                         path_syslogpid = optarg;
 709                         break;
 710                 case 'm':       /* Used by OpenBSD for "monitor mode" */
 711                 default:
 712                         usage();
 713                         /* NOTREACHED */
 714                 }
 715
 716         if (force && norotate) {
 717                 warnx("Only one of -F and -N may be specified.");
 718                 usage();
 719                 /* NOTREACHED */
 720         }
 721
 722         if (rotatereq) {
 723                 if (optind == argc) {
 724                         warnx("At least one filename must be given when -R is specified.");
 725                         usage();
 726                         /* NOTREACHED */
 727                 }
 728                 /* Make sure "requestor" value is safe for a syslog message. */
 729                 for (p = requestor; *p != '\0'; p++) {
 730                         if (!isprintch(*p) && (*p != '\t'))
 731                                 *p = '.';
 732                 }
 733         }
 734
 735         if (dbg_timenow) {
 736                 /*
 737                  * Note that the 'daytime' variable is not changed.
 738                  * That is only used in messages that track when a
 739                  * logfile is rotated, and if a file *is* rotated,
 740                  * then it will still rotated at the "real now" time.
 741                  */
 742                 ptime_free(timenow);
 743                 timenow = dbg_timenow;
 744                 fprintf(stderr, "Debug: Running as if TimeNow is %s",
 745                     ptimeget_ctime(dbg_timenow));
 746         }
 747
 748 }
 749
 750 /*
 751  * These debugging options are mainly meant for developer use, such
 752  * as writing regression-tests.  They would not be needed by users
 753  * during normal operation of newsyslog...
 754  */
 755 static int
 756 parse_doption(const char *doption)
 757 {
 758         const char TN[] = "TN=";
 759         int res;
 760
 761         if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
 762                 /*
 763                  * The "TimeNow" debugging option.  This might be off
 764                  * by an hour when crossing a timezone change.
 765                  */
 766                 dbg_timenow = ptime_init(NULL);
 767                 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
 768                     time(NULL), doption + sizeof(TN) - 1);
 769                 if (res == -2) {
 770                         warnx("Non-existent time specified on -D %s", doption);
 771                         return (0);                     /* failure */
 772                 } else if (res < 0) {
 773                         warnx("Malformed time given on -D %s", doption);
 774                         return (0);                     /* failure */
 775                 }
 776                 return (1);                     /* successfully parsed */
 777
 778         }
 779
 780         if (strcmp(doption, "ats") == 0) {
 781                 dbg_at_times++;
 782                 return (1);                     /* successfully parsed */
 783         }
 784
 785         /* XXX - This check could probably be dropped. */
 786         if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder")
 787             == 0)) {
 788                 warnx("NOTE: newsyslog always uses 'neworder'.");
 789                 return (1);                     /* successfully parsed */
 790         }
 791
 792         warnx("Unknown -D (debug) option: '%s'", doption);
 793         return (0);                             /* failure */
 794 }
 795
 796 static void
 797 usage(void)
 798 {
 799
 800         fprintf(stderr,
 801             "usage: newsyslog [-CFNPnrsv] [-a directory] [-d directory] [-f config_file]\n"
 802             "                 [-S pidfile] [-t timefmt] [[-R tagname] file ...]\n");
 803         exit(1);
 804 }
 805
 806 /*
 807  * Parse a configuration file and return a linked list of all the logs
 808  * which should be processed.
 809  */
 810 static struct cflist *
 811 get_worklist(char **files)
 812 {
 813         FILE *f;
 814         char **given;
 815         struct cflist *cmdlist, *filelist, *globlist;
 816         struct conf_entry *defconf, *dupent, *ent;
 817         struct ilist inclist;
 818         struct include_entry *inc;
 819         int gmatch, fnres;
 820
 821         defconf = NULL;
 822         STAILQ_INIT(&inclist);
 823
 824         filelist = malloc(sizeof(struct cflist));
 825         if (filelist == NULL)
 826                 err(1, "malloc of filelist");
 827         STAILQ_INIT(filelist);
 828         globlist = malloc(sizeof(struct cflist));
 829         if (globlist == NULL)
 830                 err(1, "malloc of globlist");
 831         STAILQ_INIT(globlist);
 832
 833         inc = malloc(sizeof(struct include_entry));
 834         if (inc == NULL)
 835                 err(1, "malloc of inc");
 836         inc->file = conf;
 837         if (inc->file == NULL)
 838                 inc->file = _PATH_CONF;
 839         STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp);
 840
 841         STAILQ_FOREACH(inc, &inclist, inc_nextp) {
 842                 if (strcmp(inc->file, "-") != 0)
 843                         f = fopen(inc->file, "r");
 844                 else {
 845                         f = stdin;
 846                         inc->file = "<stdin>";
 847                 }
 848                 if (!f)
 849                         err(1, "%s", inc->file);
 850
 851                 if (verbose)
 852                         printf("Processing %s\n", inc->file);
 853                 parse_file(f, filelist, globlist, &defconf, &inclist);
 854                 (void) fclose(f);
 855         }
 856
 857         /*
 858          * All config-file information has been read in and turned into
 859          * a filelist and a globlist.  If there were no specific files
 860          * given on the run command, then the only thing left to do is to
 861          * call a routine which finds all files matched by the globlist
 862          * and adds them to the filelist.  Then return the worklist.
 863          */
 864         if (*files == NULL) {
 865                 expand_globs(filelist, globlist);
 866                 free_clist(globlist);
 867                 if (defconf != NULL)
 868                         free_entry(defconf);
 869                 return (filelist);
 870         }
 871
 872         /*
 873          * If newsyslog was given a specific list of files to process,
 874          * it may be that some of those files were not listed in any
 875          * config file.  Those unlisted files should get the default
 876          * rotation action.  First, create the default-rotation action
 877          * if none was found in a system config file.
 878          */
 879         if (defconf == NULL) {
 880                 defconf = init_entry(DEFAULT_MARKER, NULL);
 881                 defconf->numlogs = 3;
 882                 defconf->trsize = 50;
 883                 defconf->permissions = S_IRUSR|S_IWUSR;
 884         }
 885
 886         /*
 887          * If newsyslog was run with a list of specific filenames,
 888          * then create a new worklist which has only those files in
 889          * it, picking up the rotation-rules for those files from
 890          * the original filelist.
 891          *
 892          * XXX - Note that this will copy multiple rules for a single
 893          *      logfile, if multiple entries are an exact match for
 894          *      that file.  That matches the historic behavior, but do
 895          *      we want to continue to allow it?  If so, it should
 896          *      probably be handled more intelligently.
 897          */
 898         cmdlist = malloc(sizeof(struct cflist));
 899         if (cmdlist == NULL)
 900                 err(1, "malloc of cmdlist");
 901         STAILQ_INIT(cmdlist);
 902
 903         for (given = files; *given; ++given) {
 904                 /*
 905                  * First try to find exact-matches for this given file.
 906                  */
 907                 gmatch = 0;
 908                 STAILQ_FOREACH(ent, filelist, cf_nextp) {
 909                         if (strcmp(ent->log, *given) == 0) {
 910                                 gmatch++;
 911                                 dupent = init_entry(*given, ent);
 912                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 913                         }
 914                 }
 915                 if (gmatch) {
 916                         if (verbose > 2)
 917                                 printf("\t+ Matched entry %s\n", *given);
 918                         continue;
 919                 }
 920
 921                 /*
 922                  * There was no exact-match for this given file, so look
 923                  * for a "glob" entry which does match.
 924                  */
 925                 gmatch = 0;
 926                 if (verbose > 2)
 927                         printf("\t+ Checking globs for %s\n", *given);
 928                 STAILQ_FOREACH(ent, globlist, cf_nextp) {
 929                         fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
 930                         if (verbose > 2)
 931                                 printf("\t+    = %d for pattern %s\n", fnres,
 932                                     ent->log);
 933                         if (fnres == 0) {
 934                                 gmatch++;
 935                                 dupent = init_entry(*given, ent);
 936                                 /* This new entry is not a glob! */
 937                                 dupent->flags &= ~CE_GLOB;
 938                                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 939                                 /* Only allow a match to one glob-entry */
 940                                 break;
 941                         }
 942                 }
 943                 if (gmatch) {
 944                         if (verbose > 2)
 945                                 printf("\t+ Matched %s via %s\n", *given,
 946                                     ent->log);
 947                         continue;
 948                 }
 949
 950                 /*
 951                  * This given file was not found in any config file, so
 952                  * add a worklist item based on the default entry.
 953                  */
 954                 if (verbose > 2)
 955                         printf("\t+ No entry matched %s  (will use %s)\n",
 956                             *given, DEFAULT_MARKER);
 957                 dupent = init_entry(*given, defconf);
 958                 /* Mark that it was *not* found in a config file */
 959                 dupent->def_cfg = 1;
 960                 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
 961         }
 962
 963         /*
 964          * Free all the entries in the original work list, the list of
 965          * glob entries, and the default entry.
 966          */
 967         free_clist(filelist);
 968         free_clist(globlist);
 969         free_entry(defconf);
 970
 971         /* And finally, return a worklist which matches the given files. */
 972         return (cmdlist);
 973 }
 974
 975 /*
 976  * Expand the list of entries with filename patterns, and add all files
 977  * which match those glob-entries onto the worklist.
 978  */
 979 static void
 980 expand_globs(struct cflist *work_p, struct cflist *glob_p)
 981 {
 982         int gmatch, gres;
 983         size_t i;
 984         char *mfname;
 985         struct conf_entry *dupent, *ent, *globent;
 986         glob_t pglob;
 987         struct stat st_fm;
 988
 989         /*
 990          * The worklist contains all fully-specified (non-GLOB) names.
 991          *
 992          * Now expand the list of filename-pattern (GLOB) entries into
 993          * a second list, which (by definition) will only match files
 994          * that already exist.  Do not add a glob-related entry for any
 995          * file which already exists in the fully-specified list.
 996          */
 997         STAILQ_FOREACH(globent, glob_p, cf_nextp) {
 998                 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
 999                 if (gres != 0) {
1000                         warn("cannot expand pattern (%d): %s", gres,
1001                             globent->log);
1002                         continue;
1003                 }
1004
1005                 if (verbose > 2)
1006                         printf("\t+ Expanding pattern %s\n", globent->log);
1007                 for (i = 0; i < pglob.gl_matchc; i++) {
1008                         mfname = pglob.gl_pathv[i];
1009
1010                         /* See if this file already has a specific entry. */
1011                         gmatch = 0;
1012                         STAILQ_FOREACH(ent, work_p, cf_nextp) {
1013                                 if (strcmp(mfname, ent->log) == 0) {
1014                                         gmatch++;
1015                                         break;
1016                                 }
1017                         }
1018                         if (gmatch)
1019                                 continue;
1020
1021                         /* Make sure the named matched is a file. */
1022                         gres = lstat(mfname, &st_fm);
1023                         if (gres != 0) {
1024                                 /* Error on a file that glob() matched?!? */
1025                                 warn("Skipping %s - lstat() error", mfname);
1026                                 continue;
1027                         }
1028                         if (!S_ISREG(st_fm.st_mode)) {
1029                                 /* We only rotate files! */
1030                                 if (verbose > 2)
1031                                         printf("\t+  . skipping %s (!file)\n",
1032                                             mfname);
1033                                 continue;
1034                         }
1035
1036                         if (verbose > 2)
1037                                 printf("\t+  . add file %s\n", mfname);
1038                         dupent = init_entry(mfname, globent);
1039                         /* This new entry is not a glob! */
1040                         dupent->flags &= ~CE_GLOB;
1041
1042                         /* Add to the worklist. */
1043                         STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp);
1044                 }
1045                 globfree(&pglob);
1046                 if (verbose > 2)
1047                         printf("\t+ Done with pattern %s\n", globent->log);
1048         }
1049 }
1050
1051 /*
1052  * Parse a configuration file and update a linked list of all the logs to
1053  * process.
1054  */
1055 static void
1056 parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
1057     struct conf_entry **defconf_p, struct ilist *inclist)
1058 {
1059         char line[BUFSIZ], *parse, *q;
1060         char *cp, *errline, *group;
1061         struct conf_entry *working;
1062         struct passwd *pwd;
1063         struct group *grp;
1064         glob_t pglob;
1065         int eol, ptm_opts, res, special;
1066         size_t i;
1067
1068         errline = NULL;
1069         while (fgets(line, BUFSIZ, cf)) {
1070                 if ((line[0] == '\n') || (line[0] == '#') ||
1071                     (strlen(line) == 0))
1072                         continue;
1073                 if (errline != NULL)
1074                         free(errline);
1075                 errline = strdup(line);
1076                 for (cp = line + 1; *cp != '\0'; cp++) {
1077                         if (*cp != '#')
1078                                 continue;
1079                         if (*(cp - 1) == '\\') {
1080                                 strcpy(cp - 1, cp);
1081                                 cp--;
1082                                 continue;
1083                         }
1084                         *cp = '\0';
1085                         break;
1086                 }
1087
1088                 q = parse = missing_field(sob(line), errline);
1089                 parse = son(line);
1090                 if (!*parse)
1091                         errx(1, "malformed line (missing fields):\n%s",
1092                             errline);
1093                 *parse = '\0';
1094
1095                 /*
1096                  * Allow people to set debug options via the config file.
1097                  * (NOTE: debug options are undocumented, and may disappear
1098                  * at any time, etc).
1099                  */
1100                 if (strcasecmp(DEBUG_MARKER, q) == 0) {
1101                         q = parse = missing_field(sob(parse + 1), errline);
1102                         parse = son(parse);
1103                         if (!*parse)
1104                                 warnx("debug line specifies no option:\n%s",
1105                                     errline);
1106                         else {
1107                                 *parse = '\0';
1108                                 parse_doption(q);
1109                         }
1110                         continue;
1111                 } else if (strcasecmp(INCLUDE_MARKER, q) == 0) {
1112                         if (verbose)
1113                                 printf("Found: %s", errline);
1114                         q = parse = missing_field(sob(parse + 1), errline);
1115                         parse = son(parse);
1116                         if (!*parse) {
1117                                 warnx("include line missing argument:\n%s",
1118                                     errline);
1119                                 continue;
1120                         }
1121
1122                         *parse = '\0';
1123
1124                         if (isglobstr(q)) {
1125                                 res = glob(q, GLOB_NOCHECK, NULL, &pglob);
1126                                 if (res != 0) {
1127                                         warn("cannot expand pattern (%d): %s",
1128                                             res, q);
1129                                         continue;
1130                                 }
1131
1132                                 if (verbose > 2)
1133                                         printf("\t+ Expanding pattern %s\n", q);
1134
1135                                 for (i = 0; i < pglob.gl_matchc; i++)
1136                                         add_to_queue(pglob.gl_pathv[i],
1137                                             inclist);
1138                                 globfree(&pglob);
1139                         } else
1140                                 add_to_queue(q, inclist);
1141                         continue;
1142                 }
1143
1144                 special = 0;
1145                 working = init_entry(q, NULL);
1146                 if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1147                         special = 1;
1148                         if (*defconf_p != NULL) {
1149                                 warnx("Ignoring duplicate entry for %s!", q);
1150                                 free_entry(working);
1151                                 continue;
1152                         }
1153                         *defconf_p = working;
1154                 }
1155
1156                 q = parse = missing_field(sob(parse + 1), errline);
1157                 parse = son(parse);
1158                 if (!*parse)
1159                         errx(1, "malformed line (missing fields):\n%s",
1160                             errline);
1161                 *parse = '\0';
1162                 if ((group = strchr(q, ':')) != NULL ||
1163                     (group = strrchr(q, '.')) != NULL) {
1164                         *group++ = '\0';
1165                         if (*q) {
1166                                 if (!(isnumberstr(q))) {
1167                                         if ((pwd = getpwnam(q)) == NULL)
1168                                                 errx(1,
1169                                      "error in config file; unknown user:\n%s",
1170                                                     errline);
1171                                         working->uid = pwd->pw_uid;
1172                                 } else
1173                                         working->uid = atoi(q);
1174                         } else
1175                                 working->uid = (uid_t)-1;
1176
1177                         q = group;
1178                         if (*q) {
1179                                 if (!(isnumberstr(q))) {
1180                                         if ((grp = getgrnam(q)) == NULL)
1181                                                 errx(1,
1182                                     "error in config file; unknown group:\n%s",
1183                                                     errline);
1184                                         working->gid = grp->gr_gid;
1185                                 } else
1186                                         working->gid = atoi(q);
1187                         } else
1188                                 working->gid = (gid_t)-1;
1189
1190                         q = parse = missing_field(sob(parse + 1), errline);
1191                         parse = son(parse);
1192                         if (!*parse)
1193                                 errx(1, "malformed line (missing fields):\n%s",
1194                                     errline);
1195                         *parse = '\0';
1196                 } else {
1197                         working->uid = (uid_t)-1;
1198                         working->gid = (gid_t)-1;
1199                 }
1200
1201                 if (!sscanf(q, "%o", &working->permissions))
1202                         errx(1, "error in config file; bad permissions:\n%s",
1203                             errline);
1204
1205                 q = parse = missing_field(sob(parse + 1), errline);
1206                 parse = son(parse);
1207                 if (!*parse)
1208                         errx(1, "malformed line (missing fields):\n%s",
1209                             errline);
1210                 *parse = '\0';
1211                 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1212                         errx(1, "error in config file; bad value for count of logs to save:\n%s",
1213                             errline);
1214
1215                 q = parse = missing_field(sob(parse + 1), errline);
1216                 parse = son(parse);
1217                 if (!*parse)
1218                         errx(1, "malformed line (missing fields):\n%s",
1219                             errline);
1220                 *parse = '\0';
1221                 if (isdigitch(*q))
1222                         working->trsize = atoi(q);
1223                 else if (strcmp(q, "*") == 0)
1224                         working->trsize = -1;
1225                 else {
1226                         warnx("Invalid value of '%s' for 'size' in line:\n%s",
1227                             q, errline);
1228                         working->trsize = -1;
1229                 }
1230
1231                 working->flags = 0;
1232                 working->compress = COMPRESS_NONE;
1233                 q = parse = missing_field(sob(parse + 1), errline);
1234                 parse = son(parse);
1235                 eol = !*parse;
1236                 *parse = '\0';
1237                 {
1238                         char *ep;
1239                         u_long ul;
1240
1241                         ul = strtoul(q, &ep, 10);
1242                         if (ep == q)
1243                                 working->hours = 0;
1244                         else if (*ep == '*')
1245                                 working->hours = -1;
1246                         else if (ul > INT_MAX)
1247                                 errx(1, "interval is too large:\n%s", errline);
1248                         else
1249                                 working->hours = ul;
1250
1251                         if (*ep == '\0' || strcmp(ep, "*") == 0)
1252                                 goto no_trimat;
1253                         if (*ep != '@' && *ep != '$')
1254                                 errx(1, "malformed interval/at:\n%s", errline);
1255
1256                         working->flags |= CE_TRIMAT;
1257                         working->trim_at = ptime_init(NULL);
1258                         ptm_opts = PTM_PARSE_ISO8601;
1259                         if (*ep == '$')
1260                                 ptm_opts = PTM_PARSE_DWM;
1261                         ptm_opts |= PTM_PARSE_MATCHDOM;
1262                         res = ptime_relparse(working->trim_at, ptm_opts,
1263                             ptimeget_secs(timenow), ep + 1);
1264                         if (res == -2)
1265                                 errx(1, "nonexistent time for 'at' value:\n%s",
1266                                     errline);
1267                         else if (res < 0)
1268                                 errx(1, "malformed 'at' value:\n%s", errline);
1269                 }
1270 no_trimat:
1271
1272                 if (eol)
1273                         q = NULL;
1274                 else {
1275                         q = parse = sob(parse + 1);     /* Optional field */
1276                         parse = son(parse);
1277                         if (!*parse)
1278                                 eol = 1;
1279                         *parse = '\0';
1280                 }
1281
1282                 for (; q && *q && !isspacech(*q); q++) {
1283                         switch (tolowerch(*q)) {
1284                         case 'b':
1285                                 working->flags |= CE_BINARY;
1286                                 break;
1287                         case 'c':
1288                                 /*
1289                                  * XXX -        Ick! Ugly! Remove ASAP!
1290                                  * We want `c' and `C' for "create".  But we
1291                                  * will temporarily treat `c' as `g', because
1292                                  * FreeBSD releases <= 4.8 have a typo of
1293                                  * checking  ('G' || 'c')  for CE_GLOB.
1294                                  */
1295                                 if (*q == 'c') {
1296                                         warnx("Assuming 'g' for 'c' in flags for line:\n%s",
1297                                             errline);
1298                                         warnx("The 'c' flag will eventually mean 'CREATE'");
1299                                         working->flags |= CE_GLOB;
1300                                         break;
1301                                 }
1302                                 working->flags |= CE_CREATE;
1303                                 break;
1304                         case 'd':
1305                                 working->flags |= CE_NODUMP;
1306                                 break;
1307                         case 'g':
1308                                 working->flags |= CE_GLOB;
1309                                 break;
1310                         case 'j':
1311                                 working->compress = COMPRESS_BZIP2;
1312                                 break;
1313                         case 'n':
1314                                 working->flags |= CE_NOSIGNAL;
1315                                 break;
1316                         case 'r':
1317                                 working->flags |= CE_PID2CMD;
1318                                 break;
1319                         case 't':
1320                                 working->flags |= CE_RFC5424;
1321                                 break;
1322                         case 'u':
1323                                 working->flags |= CE_SIGNALGROUP;
1324                                 break;
1325                         case 'w':
1326                                 /* Deprecated flag - keep for compatibility purposes */
1327                                 break;
1328                         case 'x':
1329                                 working->compress = COMPRESS_XZ;
1330                                 break;
1331                         case 'z':
1332                                 working->compress = COMPRESS_GZIP;
1333                                 break;
1334                         case '-':
1335                                 break;
1336                         case 'f':       /* Used by OpenBSD for "CE_FOLLOW" */
1337                         case 'm':       /* Used by OpenBSD for "CE_MONITOR" */
1338                         case 'p':       /* Used by NetBSD  for "CE_PLAIN0" */
1339                         default:
1340                                 errx(1, "illegal flag in config file -- %c",
1341                                     *q);
1342                         }
1343                 }
1344
1345                 if (eol)
1346                         q = NULL;
1347                 else {
1348                         q = parse = sob(parse + 1);     /* Optional field */
1349                         parse = son(parse);
1350                         if (!*parse)
1351                                 eol = 1;
1352                         *parse = '\0';
1353                 }
1354
1355                 working->pid_cmd_file = NULL;
1356                 if (q && *q) {
1357                         if (*q == '/')
1358                                 working->pid_cmd_file = strdup(q);
1359                         else if (isalnum(*q))
1360                                 goto got_sig;
1361                         else {
1362                                 errx(1,
1363                         "illegal pid file or signal in config file:\n%s",
1364                                     errline);
1365                         }
1366                 }
1367                 if (eol)
1368                         q = NULL;
1369                 else {
1370                         q = parse = sob(parse + 1);     /* Optional field */
1371                         parse = son(parse);
1372                         *parse = '\0';
1373                 }
1374
1375                 working->sig = SIGHUP;
1376                 if (q && *q) {
1377 got_sig:
1378                         working->sig = parse_signal(q);
1379                         if (working->sig < 1 || working->sig >= sys_nsig) {
1380                                 errx(1,
1381                                     "illegal signal in config file:\n%s",
1382                                     errline);
1383                         }
1384                 }
1385
1386                 /*
1387                  * Finish figuring out what pid-file to use (if any) in
1388                  * later processing if this logfile needs to be rotated.
1389                  */
1390                 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1391                         /*
1392                          * This config-entry specified 'n' for nosignal,
1393                          * see if it also specified an explicit pid_cmd_file.
1394                          * This would be a pretty pointless combination.
1395                          */
1396                         if (working->pid_cmd_file != NULL) {
1397                                 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1398                                     working->pid_cmd_file, errline);
1399                                 free(working->pid_cmd_file);
1400                                 working->pid_cmd_file = NULL;
1401                         }
1402                 } else if (working->pid_cmd_file == NULL) {
1403                         /*
1404                          * This entry did not specify the 'n' flag, which
1405                          * means it should signal syslogd unless it had
1406                          * specified some other pid-file (and obviously the
1407                          * syslog pid-file will not be for a process-group).
1408                          * Also, we should only try to notify syslog if we
1409                          * are root.
1410                          */
1411                         if (working->flags & CE_SIGNALGROUP) {
1412                                 warnx("Ignoring flag 'U' in line:\n%s",
1413                                     errline);
1414                                 working->flags &= ~CE_SIGNALGROUP;
1415                         }
1416                         if (needroot)
1417                                 working->pid_cmd_file = strdup(path_syslogpid);
1418                 }
1419
1420                 /*
1421                  * Add this entry to the appropriate list of entries, unless
1422                  * it was some kind of special entry (eg: <default>).
1423                  */
1424                 if (special) {
1425                         ;                       /* Do not add to any list */
1426                 } else if (working->flags & CE_GLOB) {
1427                         STAILQ_INSERT_TAIL(glob_p, working, cf_nextp);
1428                 } else {
1429                         STAILQ_INSERT_TAIL(work_p, working, cf_nextp);
1430                 }
1431         }
1432         if (errline != NULL)
1433                 free(errline);
1434 }
1435
1436 static char *
1437 missing_field(char *p, char *errline)
1438 {
1439
1440         if (!p || !*p)
1441                 errx(1, "missing field in config file:\n%s", errline);
1442         return (p);
1443 }
1444
1445 /*
1446  * In our sort we return it in the reverse of what qsort normally
1447  * would do, as we want the newest files first.  If we have two
1448  * entries with the same time we don't really care about order.
1449  *
1450  * Support function for qsort() in delete_oldest_timelog().
1451  */
1452 static int
1453 oldlog_entry_compare(const void *a, const void *b)
1454 {
1455         const struct oldlog_entry *ola = a, *olb = b;
1456
1457         if (ola->t > olb->t)
1458                 return (-1);
1459         else if (ola->t < olb->t)
1460                 return (1);
1461         else
1462                 return (0);
1463 }
1464
1465 /*
1466  * Check whether the file corresponding to dp is an archive of the logfile
1467  * logfname, based on the timefnamefmt format string. Return true and fill out
1468  * tm if this is the case; otherwise return false.
1469  */
1470 static int
1471 validate_old_timelog(int fd, const struct dirent *dp, const char *logfname,
1472     struct tm *tm)
1473 {
1474         struct stat sb;
1475         size_t logfname_len;
1476         char *s;
1477         int c;
1478
1479         logfname_len = strlen(logfname);
1480
1481         if (dp->d_type != DT_REG) {
1482                 /*
1483                  * Some filesystems (e.g. NFS) don't fill out the d_type field
1484                  * and leave it set to DT_UNKNOWN; in this case we must obtain
1485                  * the file type ourselves.
1486                  */
1487                 if (dp->d_type != DT_UNKNOWN ||
1488                     fstatat(fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) != 0 ||
1489                     !S_ISREG(sb.st_mode))
1490                         return (0);
1491         }
1492         /* Ignore everything but files with our logfile prefix. */
1493         if (strncmp(dp->d_name, logfname, logfname_len) != 0)
1494                 return (0);
1495         /* Ignore the actual non-rotated logfile. */
1496         if (dp->d_namlen == logfname_len)
1497                 return (0);
1498
1499         /*
1500          * Make sure we created have found a logfile, so the
1501          * postfix is valid, IE format is: '.<time>(.[bgx]z)?'.
1502          */
1503         if (dp->d_name[logfname_len] != '.') {
1504                 if (verbose)
1505                         printf("Ignoring %s which has unexpected "
1506                             "extension '%s'\n", dp->d_name,
1507                             &dp->d_name[logfname_len]);
1508                 return (0);
1509         }
1510         memset(tm, 0, sizeof(*tm));
1511         if ((s = strptime(&dp->d_name[logfname_len + 1],
1512             timefnamefmt, tm)) == NULL) {
1513                 /*
1514                  * We could special case "old" sequentially named logfiles here,
1515                  * but we do not as that would require special handling to
1516                  * decide which one was the oldest compared to "new" time based
1517                  * logfiles.
1518                  */
1519                 if (verbose)
1520                         printf("Ignoring %s which does not "
1521                             "match time format\n", dp->d_name);
1522                 return (0);
1523         }
1524
1525         for (c = 0; c < COMPRESS_TYPES; c++)
1526                 if (strcmp(s, compress_type[c].suffix) == 0)
1527                         /* We're done. */
1528                         return (1);
1529
1530         if (verbose)
1531                 printf("Ignoring %s which has unexpected extension '%s'\n",
1532                     dp->d_name, s);
1533
1534         return (0);
1535 }
1536
1537 /*
1538  * Delete the oldest logfiles, when using time based filenames.
1539  */
1540 static void
1541 delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
1542 {
1543         char *logfname, *s, *dir, errbuf[80];
1544         int dir_fd, i, logcnt, max_logcnt;
1545         struct oldlog_entry *oldlogs;
1546         struct dirent *dp;
1547         const char *cdir;
1548         struct tm tm;
1549         DIR *dirp;
1550
1551         oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry));
1552         max_logcnt = MAX_OLDLOGS;
1553         logcnt = 0;
1554
1555         if (archive_dir != NULL && archive_dir[0] != '\0')
1556                 cdir = archive_dir;
1557         else
1558                 if ((cdir = dirname(ent->log)) == NULL)
1559                         err(1, "dirname()");
1560         if ((dir = strdup(cdir)) == NULL)
1561                 err(1, "strdup()");
1562
1563         if ((s = basename(ent->log)) == NULL)
1564                 err(1, "basename()");
1565         if ((logfname = strdup(s)) == NULL)
1566                 err(1, "strdup()");
1567         if (strcmp(logfname, "/") == 0)
1568                 errx(1, "Invalid log filename - became '/'");
1569
1570         if (verbose > 2)
1571                 printf("Searching for old logs in %s\n", dir);
1572
1573         /* First we create a 'list' of all archived logfiles */
1574         if ((dirp = opendir(dir)) == NULL)
1575                 err(1, "Cannot open log directory '%s'", dir);
1576         dir_fd = dirfd(dirp);
1577         while ((dp = readdir(dirp)) != NULL) {
1578                 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0)
1579                         continue;
1580
1581                 /*
1582                  * We should now have old an old rotated logfile, so
1583                  * add it to the 'list'.
1584                  */
1585                 if ((oldlogs[logcnt].t = timegm(&tm)) == -1)
1586                         err(1, "Could not convert time string to time value");
1587                 if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL)
1588                         err(1, "strdup()");
1589                 logcnt++;
1590
1591                 /*
1592                  * It is very unlikely we ever run out of space in the
1593                  * logfile array from the default size, but lets
1594                  * handle it anyway...
1595                  */
1596                 if (logcnt >= max_logcnt) {
1597                         max_logcnt *= 4;
1598                         /* Detect integer overflow */
1599                         if (max_logcnt < logcnt)
1600                                 errx(1, "Too many old logfiles found");
1601                         oldlogs = realloc(oldlogs,
1602                             max_logcnt * sizeof(struct oldlog_entry));
1603                         if (oldlogs == NULL)
1604                                 err(1, "realloc()");
1605                 }
1606         }
1607
1608         /* Second, if needed we delete oldest archived logfiles */
1609         if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) {
1610                 oldlogs = realloc(oldlogs, logcnt *
1611                     sizeof(struct oldlog_entry));
1612                 if (oldlogs == NULL)
1613                         err(1, "realloc()");
1614
1615                 /*
1616                  * We now sort the logs in the order of newest to
1617                  * oldest.  That way we can simply skip over the
1618                  * number of records we want to keep.
1619                  */
1620                 qsort(oldlogs, logcnt, sizeof(struct oldlog_entry),
1621                     oldlog_entry_compare);
1622                 for (i = ent->numlogs - 1; i < logcnt; i++) {
1623                         if (noaction)
1624                                 printf("\trm -f %s/%s\n", dir,
1625                                     oldlogs[i].fname);
1626                         else if (unlinkat(dir_fd, oldlogs[i].fname, 0) != 0) {
1627                                 snprintf(errbuf, sizeof(errbuf),
1628                                     "Could not delete old logfile '%s'",
1629                                     oldlogs[i].fname);
1630                                 perror(errbuf);
1631                         }
1632                 }
1633         } else if (verbose > 1)
1634                 printf("No old logs to delete for logfile %s\n", ent->log);
1635
1636         /* Third, cleanup */
1637         closedir(dirp);
1638         for (i = 0; i < logcnt; i++) {
1639                 assert(oldlogs[i].fname != NULL);
1640                 free(oldlogs[i].fname);
1641         }
1642         free(oldlogs);
1643         free(logfname);
1644         free(dir);
1645 }
1646
1647 /*
1648  * Generate a log filename, when using classic filenames.
1649  */
1650 static void
1651 gen_classiclog_fname(char *fname, size_t fname_sz, const char *archive_dir,
1652     const char *namepart, int numlogs_c)
1653 {
1654
1655         if (archive_dir[0] != '\0')
1656                 (void) snprintf(fname, fname_sz, "%s/%s.%d", archive_dir,
1657                     namepart, numlogs_c);
1658         else
1659                 (void) snprintf(fname, fname_sz, "%s.%d", namepart, numlogs_c);
1660 }
1661
1662 /*
1663  * Delete a rotated logfile, when using classic filenames.
1664  */
1665 static void
1666 delete_classiclog(const char *archive_dir, const char *namepart, int numlog_c)
1667 {
1668         char file1[MAXPATHLEN], zfile1[MAXPATHLEN];
1669         int c;
1670
1671         gen_classiclog_fname(file1, sizeof(file1), archive_dir, namepart,
1672             numlog_c);
1673
1674         for (c = 0; c < COMPRESS_TYPES; c++) {
1675                 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1676                     compress_type[c].suffix);
1677                 if (noaction)
1678                         printf("\trm -f %s\n", zfile1);
1679                 else
1680                         (void) unlink(zfile1);
1681         }
1682 }
1683
1684 /*
1685  * Only add to the queue if the file hasn't already been added. This is
1686  * done to prevent circular include loops.
1687  */
1688 static void
1689 add_to_queue(const char *fname, struct ilist *inclist)
1690 {
1691         struct include_entry *inc;
1692
1693         STAILQ_FOREACH(inc, inclist, inc_nextp) {
1694                 if (strcmp(fname, inc->file) == 0) {
1695                         warnx("duplicate include detected: %s", fname);
1696                         return;
1697                 }
1698         }
1699
1700         inc = malloc(sizeof(struct include_entry));
1701         if (inc == NULL)
1702                 err(1, "malloc of inc");
1703         inc->file = strdup(fname);
1704
1705         if (verbose > 2)
1706                 printf("\t+ Adding %s to the processing queue.\n", fname);
1707
1708         STAILQ_INSERT_TAIL(inclist, inc, inc_nextp);
1709 }
1710
1711 /*
1712  * Search for logfile and return its compression suffix (if supported)
1713  * The suffix detection is first-match in the order of compress_types
1714  *
1715  * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE)
1716  * a zero-length string is returned
1717  */
1718 static const char *
1719 get_logfile_suffix(const char *logfile)
1720 {
1721         struct stat st;
1722         char zfile[MAXPATHLEN];
1723         int c;
1724
1725         for (c = 0; c < COMPRESS_TYPES; c++) {
1726                 (void) strlcpy(zfile, logfile, MAXPATHLEN);
1727                 (void) strlcat(zfile, compress_type[c].suffix, MAXPATHLEN);
1728                 if (lstat(zfile, &st) == 0)
1729                         return (compress_type[c].suffix);
1730         }
1731         return (NULL);
1732 }
1733
1734 static fk_entry
1735 do_rotate(const struct conf_entry *ent)
1736 {
1737         char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1738         char file1[MAXPATHLEN], file2[MAXPATHLEN];
1739         char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1740         const char *logfile_suffix;
1741         char datetimestr[30];
1742         int flags, numlogs_c;
1743         fk_entry free_or_keep;
1744         struct sigwork_entry *swork;
1745         struct stat st;
1746         struct tm tm;
1747         time_t now;
1748
1749         flags = ent->flags;
1750         free_or_keep = FREE_ENT;
1751
1752         if (archtodir) {
1753                 char *p;
1754
1755                 /* build complete name of archive directory into dirpart */
1756                 if (*archdirname == '/') {      /* absolute */
1757                         strlcpy(dirpart, archdirname, sizeof(dirpart));
1758                 } else {        /* relative */
1759                         /* get directory part of logfile */
1760                         strlcpy(dirpart, ent->log, sizeof(dirpart));
1761                         if ((p = strrchr(dirpart, '/')) == NULL)
1762                                 dirpart[0] = '\0';
1763                         else
1764                                 *(p + 1) = '\0';
1765                         strlcat(dirpart, archdirname, sizeof(dirpart));
1766                 }
1767
1768                 /* check if archive directory exists, if not, create it */
1769                 if (lstat(dirpart, &st))
1770                         createdir(ent, dirpart);
1771
1772                 /* get filename part of logfile */
1773                 if ((p = strrchr(ent->log, '/')) == NULL)
1774                         strlcpy(namepart, ent->log, sizeof(namepart));
1775                 else
1776                         strlcpy(namepart, p + 1, sizeof(namepart));
1777         } else {
1778                 /*
1779                  * Tell utility functions we are not using an archive
1780                  * dir.
1781                  */
1782                 dirpart[0] = '\0';
1783                 strlcpy(namepart, ent->log, sizeof(namepart));
1784         }
1785
1786         /* Delete old logs */
1787         if (timefnamefmt != NULL)
1788                 delete_oldest_timelog(ent, dirpart);
1789         else {
1790                 /*
1791                  * Handle cleaning up after legacy newsyslog where we
1792                  * kept ent->numlogs + 1 files.  This code can go away
1793                  * at some point in the future.
1794                  */
1795                 delete_classiclog(dirpart, namepart, ent->numlogs);
1796
1797                 if (ent->numlogs > 0)
1798                         delete_classiclog(dirpart, namepart, ent->numlogs - 1);
1799
1800         }
1801
1802         if (timefnamefmt != NULL) {
1803                 /* If time functions fails we can't really do any sensible */
1804                 if (time(&now) == (time_t)-1 ||
1805                     localtime_r(&now, &tm) == NULL)
1806                         bzero(&tm, sizeof(tm));
1807
1808                 strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm);
1809                 if (archtodir)
1810                         (void) snprintf(file1, sizeof(file1), "%s/%s.%s",
1811                             dirpart, namepart, datetimestr);
1812                 else
1813                         (void) snprintf(file1, sizeof(file1), "%s.%s",
1814                             ent->log, datetimestr);
1815
1816                 /* Don't run the code to move down logs */
1817                 numlogs_c = -1;
1818         } else {
1819                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1820                     ent->numlogs - 1);
1821                 numlogs_c = ent->numlogs - 2;           /* copy for countdown */
1822         }
1823
1824         /* Move down log files */
1825         for (; numlogs_c >= 0; numlogs_c--) {
1826                 (void) strlcpy(file2, file1, sizeof(file2));
1827
1828                 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1829                     numlogs_c);
1830
1831                 logfile_suffix = get_logfile_suffix(file1);
1832                 if (logfile_suffix == NULL)
1833                         continue;
1834                 (void) strlcpy(zfile1, file1, MAXPATHLEN);
1835                 (void) strlcpy(zfile2, file2, MAXPATHLEN);
1836                 (void) strlcat(zfile1, logfile_suffix, MAXPATHLEN);
1837                 (void) strlcat(zfile2, logfile_suffix, MAXPATHLEN);
1838
1839                 if (noaction)
1840                         printf("\tmv %s %s\n", zfile1, zfile2);
1841                 else {
1842                         /* XXX - Ought to be checking for failure! */
1843                         (void)rename(zfile1, zfile2);
1844                 }
1845                 change_attrs(zfile2, ent);
1846         }
1847
1848         if (ent->numlogs > 0) {
1849                 if (noaction) {
1850                         /*
1851                          * Note that savelog() may succeed with using link()
1852                          * for the archtodir case, but there is no good way
1853                          * of knowing if it will when doing "noaction", so
1854                          * here we claim that it will have to do a copy...
1855                          */
1856                         if (archtodir)
1857                                 printf("\tcp %s %s\n", ent->log, file1);
1858                         else
1859                                 printf("\tln %s %s\n", ent->log, file1);
1860                         printf("\ttouch %s\t\t"
1861                             "# Update mtime for 'when'-interval processing\n",
1862                             file1);
1863                 } else {
1864                         if (!(flags & CE_BINARY)) {
1865                                 /* Report the trimming to the old log */
1866                                 log_trim(ent->log, ent);
1867                         }
1868                         savelog(ent->log, file1);
1869                         /*
1870                          * Interval-based rotations are done using the mtime of
1871                          * the most recently archived log, so make sure it gets
1872                          * updated during a rotation.
1873                          */
1874                         utimes(file1, NULL);
1875                 }
1876                 change_attrs(file1, ent);
1877         }
1878
1879         /* Create the new log file and move it into place */
1880         if (noaction)
1881                 printf("Start new log...\n");
1882         createlog(ent);
1883
1884         /*
1885          * Save all signalling and file-compression to be done after log
1886          * files from all entries have been rotated.  This way any one
1887          * process will not be sent the same signal multiple times when
1888          * multiple log files had to be rotated.
1889          */
1890         swork = NULL;
1891         if (ent->pid_cmd_file != NULL)
1892                 swork = save_sigwork(ent);
1893         if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) {
1894                 /*
1895                  * The zipwork_entry will include a pointer to this
1896                  * conf_entry, so the conf_entry should not be freed.
1897                  */
1898                 free_or_keep = KEEP_ENT;
1899                 save_zipwork(ent, swork, ent->fsize, file1);
1900         }
1901
1902         return (free_or_keep);
1903 }
1904
1905 static void
1906 do_sigwork(struct sigwork_entry *swork)
1907 {
1908         struct sigwork_entry *nextsig;
1909         int kres, secs;
1910         char *tmp;
1911
1912         if (swork->sw_runcmd == 0 && (!(swork->sw_pidok) || swork->sw_pid == 0))
1913                 return;                 /* no work to do... */
1914
1915         /*
1916          * If nosignal (-s) was specified, then do not signal any process.
1917          * Note that a nosignal request triggers a warning message if the
1918          * rotated logfile needs to be compressed, *unless* -R was also
1919          * specified.  We assume that an `-sR' request came from a process
1920          * which writes to the logfile, and as such, we assume that process
1921          * has already made sure the logfile is not presently in use.  This
1922          * just sets swork->sw_pidok to a special value, and do_zipwork
1923          * will print any necessary warning(s).
1924          */
1925         if (nosignal) {
1926                 if (!rotatereq)
1927                         swork->sw_pidok = -1;
1928                 return;
1929         }
1930
1931         /*
1932          * Compute the pause between consecutive signals.  Use a longer
1933          * sleep time if we will be sending two signals to the same
1934          * daemon or process-group.
1935          */
1936         secs = 0;
1937         nextsig = SLIST_NEXT(swork, sw_nextp);
1938         if (nextsig != NULL) {
1939                 if (swork->sw_pid == nextsig->sw_pid)
1940                         secs = 10;
1941                 else
1942                         secs = 1;
1943         }
1944
1945         if (noaction) {
1946                 if (swork->sw_runcmd)
1947                         printf("\tsh -c '%s %d'\n", swork->sw_fname,
1948                             swork->sw_signum);
1949                 else {
1950                         printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1951                             (int)swork->sw_pid, swork->sw_fname);
1952                         if (secs > 0)
1953                                 printf("\tsleep %d\n", secs);
1954                 }
1955                 return;
1956         }
1957
1958         if (swork->sw_runcmd) {
1959                 asprintf(&tmp, "%s %d", swork->sw_fname, swork->sw_signum);
1960                 if (tmp == NULL) {
1961                         warn("can't allocate memory to run %s",
1962                             swork->sw_fname);
1963                         return;
1964                 }
1965                 if (verbose)
1966                         printf("Run command: %s\n", tmp);
1967                 kres = system(tmp);
1968                 if (kres) {
1969                         warnx("%s: returned non-zero exit code: %d",
1970                             tmp, kres);
1971                 }
1972                 free(tmp);
1973                 return;
1974         }
1975
1976         kres = kill(swork->sw_pid, swork->sw_signum);
1977         if (kres != 0) {
1978                 /*
1979                  * Assume that "no such process" (ESRCH) is something
1980                  * to warn about, but is not an error.  Presumably the
1981                  * process which writes to the rotated log file(s) is
1982                  * gone, in which case we should have no problem with
1983                  * compressing the rotated log file(s).
1984                  */
1985                 if (errno != ESRCH)
1986                         swork->sw_pidok = 0;
1987                 warn("can't notify %s, pid %d = %s", swork->sw_pidtype,
1988                     (int)swork->sw_pid, swork->sw_fname);
1989         } else {
1990                 if (verbose)
1991                         printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
1992                             (int)swork->sw_pid, swork->sw_fname);
1993                 if (secs > 0) {
1994                         if (verbose)
1995                                 printf("Pause %d second(s) between signals\n",
1996                                     secs);
1997                         sleep(secs);
1998                 }
1999         }
2000 }
2001
2002 static void
2003 do_zipwork(struct zipwork_entry *zwork)
2004 {
2005         const char *pgm_name, *pgm_path;
2006         int errsav, fcount, zstatus;
2007         pid_t pidzip, wpid;
2008         char zresult[MAXPATHLEN];
2009         int c;
2010
2011         assert(zwork != NULL);
2012         pgm_path = NULL;
2013         strlcpy(zresult, zwork->zw_fname, sizeof(zresult));
2014         if (zwork->zw_conf != NULL &&
2015             zwork->zw_conf->compress > COMPRESS_NONE)
2016                 for (c = 1; c < COMPRESS_TYPES; c++) {
2017                         if (zwork->zw_conf->compress == c) {
2018                                 pgm_path = compress_type[c].path;
2019                                 (void) strlcat(zresult,
2020                                     compress_type[c].suffix, sizeof(zresult));
2021                                 break;
2022                         }
2023                 }
2024         if (pgm_path == NULL) {
2025                 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname);
2026                 return;
2027         }
2028         pgm_name = strrchr(pgm_path, '/');
2029         if (pgm_name == NULL)
2030                 pgm_name = pgm_path;
2031         else
2032                 pgm_name++;
2033
2034         if (zwork->zw_swork != NULL && zwork->zw_swork->sw_runcmd == 0 &&
2035             zwork->zw_swork->sw_pidok <= 0) {
2036                 warnx(
2037                     "log %s not compressed because daemon(s) not notified",
2038                     zwork->zw_fname);
2039                 change_attrs(zwork->zw_fname, zwork->zw_conf);
2040                 return;
2041         }
2042
2043         if (noaction) {
2044                 printf("\t%s %s\n", pgm_name, zwork->zw_fname);
2045                 change_attrs(zresult, zwork->zw_conf);
2046                 return;
2047         }
2048
2049         fcount = 1;
2050         pidzip = fork();
2051         while (pidzip < 0) {
2052                 /*
2053                  * The fork failed.  If the failure was due to a temporary
2054                  * problem, then wait a short time and try it again.
2055                  */
2056                 errsav = errno;
2057                 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname);
2058                 if (errsav != EAGAIN || fcount > 5)
2059                         errx(1, "Exiting...");
2060                 sleep(fcount * 12);
2061                 fcount++;
2062                 pidzip = fork();
2063         }
2064         if (!pidzip) {
2065                 /* The child process executes the compression command */
2066                 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0);
2067                 err(1, "execl(`%s -f %s')", pgm_path, zwork->zw_fname);
2068         }
2069
2070         wpid = waitpid(pidzip, &zstatus, 0);
2071         if (wpid == -1) {
2072                 /* XXX - should this be a fatal error? */
2073                 warn("%s: waitpid(%d)", pgm_path, pidzip);
2074                 return;
2075         }
2076         if (!WIFEXITED(zstatus)) {
2077                 warnx("`%s -f %s' did not terminate normally", pgm_name,
2078                     zwork->zw_fname);
2079                 return;
2080         }
2081         if (WEXITSTATUS(zstatus)) {
2082                 warnx("`%s -f %s' terminated with a non-zero status (%d)",
2083                     pgm_name, zwork->zw_fname, WEXITSTATUS(zstatus));
2084                 return;
2085         }
2086
2087         /* Compression was successful, set file attributes on the result. */
2088         change_attrs(zresult, zwork->zw_conf);
2089 }
2090
2091 /*
2092  * Save information on any process we need to signal.  Any single
2093  * process may need to be sent different signal-values for different
2094  * log files, but usually a single signal-value will cause the process
2095  * to close and re-open all of it's log files.
2096  */
2097 static struct sigwork_entry *
2098 save_sigwork(const struct conf_entry *ent)
2099 {
2100         struct sigwork_entry *sprev, *stmp;
2101         int ndiff;
2102         size_t tmpsiz;
2103
2104         sprev = NULL;
2105         ndiff = 1;
2106         SLIST_FOREACH(stmp, &swhead, sw_nextp) {
2107                 ndiff = strcmp(ent->pid_cmd_file, stmp->sw_fname);
2108                 if (ndiff > 0)
2109                         break;
2110                 if (ndiff == 0) {
2111                         if (ent->sig == stmp->sw_signum)
2112                                 break;
2113                         if (ent->sig > stmp->sw_signum) {
2114                                 ndiff = 1;
2115                                 break;
2116                         }
2117                 }
2118                 sprev = stmp;
2119         }
2120         if (stmp != NULL && ndiff == 0)
2121                 return (stmp);
2122
2123         tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_cmd_file) + 1;
2124         stmp = malloc(tmpsiz);
2125
2126         stmp->sw_runcmd = 0;
2127         /* If this is a command to run we just set the flag and run command */
2128         if (ent->flags & CE_PID2CMD) {
2129                 stmp->sw_pid = -1;
2130                 stmp->sw_pidok = 0;
2131                 stmp->sw_runcmd = 1;
2132         } else {
2133                 set_swpid(stmp, ent);
2134         }
2135         stmp->sw_signum = ent->sig;
2136         strcpy(stmp->sw_fname, ent->pid_cmd_file);
2137         if (sprev == NULL)
2138                 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
2139         else
2140                 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
2141         return (stmp);
2142 }
2143
2144 /*
2145  * Save information on any file we need to compress.  We may see the same
2146  * file multiple times, so check the full list to avoid duplicates.  The
2147  * list itself is sorted smallest-to-largest, because that's the order we
2148  * want to compress the files.  If the partition is very low on disk space,
2149  * then the smallest files are the most likely to compress, and compressing
2150  * them first will free up more space for the larger files.
2151  */
2152 static struct zipwork_entry *
2153 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
2154     int zsize, const char *zipfname)
2155 {
2156         struct zipwork_entry *zprev, *ztmp;
2157         int ndiff;
2158         size_t tmpsiz;
2159
2160         /* Compute the size if the caller did not know it. */
2161         if (zsize < 0)
2162                 zsize = sizefile(zipfname);
2163
2164         zprev = NULL;
2165         ndiff = 1;
2166         SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
2167                 ndiff = strcmp(zipfname, ztmp->zw_fname);
2168                 if (ndiff == 0)
2169                         break;
2170                 if (zsize > ztmp->zw_fsize)
2171                         zprev = ztmp;
2172         }
2173         if (ztmp != NULL && ndiff == 0)
2174                 return (ztmp);
2175
2176         tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
2177         ztmp = malloc(tmpsiz);
2178         ztmp->zw_conf = ent;
2179         ztmp->zw_swork = swork;
2180         ztmp->zw_fsize = zsize;
2181         strcpy(ztmp->zw_fname, zipfname);
2182         if (zprev == NULL)
2183                 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
2184         else
2185                 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
2186         return (ztmp);
2187 }
2188
2189 /* Send a signal to the pid specified by pidfile */
2190 static void
2191 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
2192 {
2193         FILE *f;
2194         long minok, maxok, rval;
2195         char *endp, *linep, line[BUFSIZ];
2196
2197         minok = MIN_PID;
2198         maxok = MAX_PID;
2199         swork->sw_pidok = 0;
2200         swork->sw_pid = 0;
2201         swork->sw_pidtype = "daemon";
2202         if (ent->flags & CE_SIGNALGROUP) {
2203                 /*
2204                  * If we are expected to signal a process-group when
2205                  * rotating this logfile, then the value read in should
2206                  * be the negative of a valid process ID.
2207                  */
2208                 minok = -MAX_PID;
2209                 maxok = -MIN_PID;
2210                 swork->sw_pidtype = "process-group";
2211         }
2212
2213         f = fopen(ent->pid_cmd_file, "r");
2214         if (f == NULL) {
2215                 if (errno == ENOENT && enforcepid == 0) {
2216                         /*
2217                          * Warn if the PID file doesn't exist, but do
2218                          * not consider it an error.  Most likely it
2219                          * means the process has been terminated,
2220                          * so it should be safe to rotate any log
2221                          * files that the process would have been using.
2222                          */
2223                         swork->sw_pidok = 1;
2224                         warnx("pid file doesn't exist: %s", ent->pid_cmd_file);
2225                 } else
2226                         warn("can't open pid file: %s", ent->pid_cmd_file);
2227                 return;
2228         }
2229
2230         if (fgets(line, BUFSIZ, f) == NULL) {
2231                 /*
2232                  * Warn if the PID file is empty, but do not consider
2233                  * it an error.  Most likely it means the process has
2234                  * has terminated, so it should be safe to rotate any
2235                  * log files that the process would have been using.
2236                  */
2237                 if (feof(f) && enforcepid == 0) {
2238                         swork->sw_pidok = 1;
2239                         warnx("pid/cmd file is empty: %s", ent->pid_cmd_file);
2240                 } else
2241                         warn("can't read from pid file: %s", ent->pid_cmd_file);
2242                 (void)fclose(f);
2243                 return;
2244         }
2245         (void)fclose(f);
2246
2247         errno = 0;
2248         linep = line;
2249         while (*linep == ' ')
2250                 linep++;
2251         rval = strtol(linep, &endp, 10);
2252         if (*endp != '\0' && !isspacech(*endp)) {
2253                 warnx("pid file does not start with a valid number: %s",
2254                     ent->pid_cmd_file);
2255         } else if (rval < minok || rval > maxok) {
2256                 warnx("bad value '%ld' for process number in %s",
2257                     rval, ent->pid_cmd_file);
2258                 if (verbose)
2259                         warnx("\t(expecting value between %ld and %ld)",
2260                             minok, maxok);
2261         } else {
2262                 swork->sw_pidok = 1;
2263                 swork->sw_pid = rval;
2264         }
2265
2266         return;
2267 }
2268
2269 /* Log the fact that the logs were turned over */
2270 static int
2271 log_trim(const char *logname, const struct conf_entry *log_ent)
2272 {
2273         FILE *f;
2274         const char *xtra;
2275
2276         if ((f = fopen(logname, "a")) == NULL)
2277                 return (-1);
2278         xtra = "";
2279         if (log_ent->def_cfg)
2280                 xtra = " using <default> rule";
2281         if (log_ent->flags & CE_RFC5424) {
2282                 if (log_ent->firstcreate) {
2283                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s\n",
2284                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2285                             daytime_rfc5424, hostname, getpid(),
2286                             "logfile first created", xtra);
2287                 } else if (log_ent->r_reason != NULL) {
2288                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s%s\n",
2289                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2290                             daytime_rfc5424, hostname, getpid(),
2291                             "logfile turned over", log_ent->r_reason, xtra);
2292                 } else {
2293                         fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s\n",
2294                             LOG_MAKEPRI(LOG_USER, LOG_INFO),
2295                             daytime_rfc5424, hostname, getpid(),
2296                             "logfile turned over", xtra);
2297                 }
2298         } else {
2299                 if (log_ent->firstcreate)
2300                         fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n",
2301                             daytime, hostname, getpid(), xtra);
2302                 else if (log_ent->r_reason != NULL)
2303                         fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n",
2304                             daytime, hostname, getpid(), log_ent->r_reason, xtra);
2305                 else
2306                         fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n",
2307                             daytime, hostname, getpid(), xtra);
2308         }
2309         if (fclose(f) == EOF)
2310                 err(1, "log_trim: fclose");
2311         return (0);
2312 }
2313
2314 /* Return size in kilobytes of a file */
2315 static int
2316 sizefile(const char *file)
2317 {
2318         struct stat sb;
2319
2320         if (stat(file, &sb) < 0)
2321                 return (-1);
2322         return (kbytes(sb.st_size));
2323 }
2324
2325 /*
2326  * Return the mtime of the most recent archive of the logfile, using timestamp
2327  * based filenames.
2328  */
2329 static time_t
2330 mtime_old_timelog(const char *file)
2331 {
2332         struct stat sb;
2333         struct tm tm;
2334         int dir_fd;
2335         time_t t;
2336         struct dirent *dp;
2337         DIR *dirp;
2338         char *s, *logfname, *dir;
2339
2340         t = -1;
2341
2342         if ((dir = dirname(file)) == NULL) {
2343                 warn("dirname() of '%s'", file);
2344                 return (t);
2345         }
2346         if ((s = basename(file)) == NULL) {
2347                 warn("basename() of '%s'", file);
2348                 return (t);
2349         } else if (s[0] == '/') {
2350                 warnx("Invalid log filename '%s'", s);
2351                 return (t);
2352         } else if ((logfname = strdup(s)) == NULL)
2353                 err(1, "strdup()");
2354
2355         if ((dirp = opendir(dir)) == NULL) {
2356                 warn("Cannot open log directory '%s'", dir);
2357                 return (t);
2358         }
2359         dir_fd = dirfd(dirp);
2360         /* Open the archive dir and find the most recent archive of logfname. */
2361         while ((dp = readdir(dirp)) != NULL) {
2362                 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0)
2363                         continue;
2364
2365                 if (fstatat(dir_fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) == -1) {
2366                         warn("Cannot stat '%s'", file);
2367                         continue;
2368                 }
2369                 if (t < sb.st_mtime)
2370                         t = sb.st_mtime;
2371         }
2372         closedir(dirp);
2373
2374         return (t);
2375 }
2376
2377 /* Return the age in hours of the most recent archive of the logfile. */
2378 static int
2379 age_old_log(const char *file)
2380 {
2381         struct stat sb;
2382         const char *logfile_suffix;
2383         char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1];
2384         time_t mtime;
2385
2386         if (archtodir) {
2387                 char *p;
2388
2389                 /* build name of archive directory into tmp */
2390                 if (*archdirname == '/') {      /* absolute */
2391                         strlcpy(tmp, archdirname, sizeof(tmp));
2392                 } else {        /* relative */
2393                         /* get directory part of logfile */
2394                         strlcpy(tmp, file, sizeof(tmp));
2395                         if ((p = strrchr(tmp, '/')) == NULL)
2396                                 tmp[0] = '\0';
2397                         else
2398                                 *(p + 1) = '\0';
2399                         strlcat(tmp, archdirname, sizeof(tmp));
2400                 }
2401
2402                 strlcat(tmp, "/", sizeof(tmp));
2403
2404                 /* get filename part of logfile */
2405                 if ((p = strrchr(file, '/')) == NULL)
2406                         strlcat(tmp, file, sizeof(tmp));
2407                 else
2408                         strlcat(tmp, p + 1, sizeof(tmp));
2409         } else {
2410                 (void) strlcpy(tmp, file, sizeof(tmp));
2411         }
2412
2413         if (timefnamefmt != NULL) {
2414                 mtime = mtime_old_timelog(tmp);
2415                 if (mtime == -1)
2416                         return (-1);
2417         } else {
2418                 strlcat(tmp, ".0", sizeof(tmp));
2419                 logfile_suffix = get_logfile_suffix(tmp);
2420                 if (logfile_suffix == NULL)
2421                         return (-1);
2422                 (void) strlcat(tmp, logfile_suffix, sizeof(tmp));
2423                 if (stat(tmp, &sb) < 0)
2424                         return (-1);
2425                 mtime = sb.st_mtime;
2426         }
2427
2428         return ((int)(ptimeget_secs(timenow) - mtime + 1800) / 3600);
2429 }
2430
2431 /* Skip Over Blanks */
2432 static char *
2433 sob(char *p)
2434 {
2435         while (p && *p && isspace(*p))
2436                 p++;
2437         return (p);
2438 }
2439
2440 /* Skip Over Non-Blanks */
2441 static char *
2442 son(char *p)
2443 {
2444         while (p && *p && !isspace(*p))
2445                 p++;
2446         return (p);
2447 }
2448
2449 /* Check if string is actually a number */
2450 static int
2451 isnumberstr(const char *string)
2452 {
2453         while (*string) {
2454                 if (!isdigitch(*string++))
2455                         return (0);
2456         }
2457         return (1);
2458 }
2459
2460 /* Check if string contains a glob */
2461 static int
2462 isglobstr(const char *string)
2463 {
2464         char chr;
2465
2466         while ((chr = *string++)) {
2467                 if (chr == '*' || chr == '?' || chr == '[')
2468                         return (1);
2469         }
2470         return (0);
2471 }
2472
2473 /*
2474  * Save the active log file under a new name.  A link to the new name
2475  * is the quick-and-easy way to do this.  If that fails (which it will
2476  * if the destination is on another partition), then make a copy of
2477  * the file to the new location.
2478  */
2479 static void
2480 savelog(char *from, char *to)
2481 {
2482         FILE *src, *dst;
2483         int c, res;
2484
2485         res = link(from, to);
2486         if (res == 0)
2487                 return;
2488
2489         if ((src = fopen(from, "r")) == NULL)
2490                 err(1, "can't fopen %s for reading", from);
2491         if ((dst = fopen(to, "w")) == NULL)
2492                 err(1, "can't fopen %s for writing", to);
2493
2494         while ((c = getc(src)) != EOF) {
2495                 if ((putc(c, dst)) == EOF)
2496                         err(1, "error writing to %s", to);
2497         }
2498
2499         if (ferror(src))
2500                 err(1, "error reading from %s", from);
2501         if ((fclose(src)) != 0)
2502                 err(1, "can't fclose %s", to);
2503         if ((fclose(dst)) != 0)
2504                 err(1, "can't fclose %s", from);
2505 }
2506
2507 /* create one or more directory components of a path */
2508 static void
2509 createdir(const struct conf_entry *ent, char *dirpart)
2510 {
2511         int res;
2512         char *s, *d;
2513         char mkdirpath[MAXPATHLEN];
2514         struct stat st;
2515
2516         s = dirpart;
2517         d = mkdirpath;
2518
2519         for (;;) {
2520                 *d++ = *s++;
2521                 if (*s != '/' && *s != '\0')
2522                         continue;
2523                 *d = '\0';
2524                 res = lstat(mkdirpath, &st);
2525                 if (res != 0) {
2526                         if (noaction) {
2527                                 printf("\tmkdir %s\n", mkdirpath);
2528                         } else {
2529                                 res = mkdir(mkdirpath, 0755);
2530                                 if (res != 0)
2531                                         err(1, "Error on mkdir(\"%s\") for -a",
2532                                             mkdirpath);
2533                         }
2534                 }
2535                 if (*s == '\0')
2536                         break;
2537         }
2538         if (verbose) {
2539                 if (ent->firstcreate)
2540                         printf("Created directory '%s' for new %s\n",
2541                             dirpart, ent->log);
2542                 else
2543                         printf("Created directory '%s' for -a\n", dirpart);
2544         }
2545 }
2546
2547 /*
2548  * Create a new log file, destroying any currently-existing version
2549  * of the log file in the process.  If the caller wants a backup copy
2550  * of the file to exist, they should call 'link(logfile,logbackup)'
2551  * before calling this routine.
2552  */
2553 void
2554 createlog(const struct conf_entry *ent)
2555 {
2556         int fd, failed;
2557         struct stat st;
2558         char *realfile, *slash, tempfile[MAXPATHLEN];
2559
2560         fd = -1;
2561         realfile = ent->log;
2562
2563         /*
2564          * If this log file is being created for the first time (-C option),
2565          * then it may also be true that the parent directory does not exist
2566          * yet.  Check, and create that directory if it is missing.
2567          */
2568         if (ent->firstcreate) {
2569                 strlcpy(tempfile, realfile, sizeof(tempfile));
2570                 slash = strrchr(tempfile, '/');
2571                 if (slash != NULL) {
2572                         *slash = '\0';
2573                         failed = stat(tempfile, &st);
2574                         if (failed && errno != ENOENT)
2575                                 err(1, "Error on stat(%s)", tempfile);
2576                         if (failed)
2577                                 createdir(ent, tempfile);
2578                         else if (!S_ISDIR(st.st_mode))
2579                                 errx(1, "%s exists but is not a directory",
2580                                     tempfile);
2581                 }
2582         }
2583
2584         /*
2585          * First create an unused filename, so it can be chown'ed and
2586          * chmod'ed before it is moved into the real location.  mkstemp
2587          * will create the file mode=600 & owned by us.  Note that all
2588          * temp files will have a suffix of '.z<something>'.
2589          */
2590         strlcpy(tempfile, realfile, sizeof(tempfile));
2591         strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2592         if (noaction)
2593                 printf("\tmktemp %s\n", tempfile);
2594         else {
2595                 fd = mkstemp(tempfile);
2596                 if (fd < 0)
2597                         err(1, "can't mkstemp logfile %s", tempfile);
2598
2599                 /*
2600                  * Add status message to what will become the new log file.
2601                  */
2602                 if (!(ent->flags & CE_BINARY)) {
2603                         if (log_trim(tempfile, ent))
2604                                 err(1, "can't add status message to log");
2605                 }
2606         }
2607
2608         /* Change the owner/group, if we are supposed to */
2609         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2610                 if (noaction)
2611                         printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2612                             tempfile);
2613                 else {
2614                         failed = fchown(fd, ent->uid, ent->gid);
2615                         if (failed)
2616                                 err(1, "can't fchown temp file %s", tempfile);
2617                 }
2618         }
2619
2620         /* Turn on NODUMP if it was requested in the config-file. */
2621         if (ent->flags & CE_NODUMP) {
2622                 if (noaction)
2623                         printf("\tchflags nodump %s\n", tempfile);
2624                 else {
2625                         failed = fchflags(fd, UF_NODUMP);
2626                         if (failed) {
2627                                 warn("log_trim: fchflags(NODUMP)");
2628                         }
2629                 }
2630         }
2631
2632         /*
2633          * Note that if the real logfile still exists, and if the call
2634          * to rename() fails, then "neither the old file nor the new
2635          * file shall be changed or created" (to quote the standard).
2636          * If the call succeeds, then the file will be replaced without
2637          * any window where some other process might find that the file
2638          * did not exist.
2639          * XXX - ? It may be that for some error conditions, we could
2640          *      retry by first removing the realfile and then renaming.
2641          */
2642         if (noaction) {
2643                 printf("\tchmod %o %s\n", ent->permissions, tempfile);
2644                 printf("\tmv %s %s\n", tempfile, realfile);
2645         } else {
2646                 failed = fchmod(fd, ent->permissions);
2647                 if (failed)
2648                         err(1, "can't fchmod temp file '%s'", tempfile);
2649                 failed = rename(tempfile, realfile);
2650                 if (failed)
2651                         err(1, "can't mv %s to %s", tempfile, realfile);
2652         }
2653
2654         if (fd >= 0)
2655                 close(fd);
2656 }
2657
2658 /*
2659  * Change the attributes of a given filename to what was specified in
2660  * the newsyslog.conf entry.  This routine is only called for files
2661  * that newsyslog expects that it has created, and thus it is a fatal
2662  * error if this routine finds that the file does not exist.
2663  */
2664 static void
2665 change_attrs(const char *fname, const struct conf_entry *ent)
2666 {
2667         int failed;
2668
2669         if (noaction) {
2670                 printf("\tchmod %o %s\n", ent->permissions, fname);
2671
2672                 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2673                         printf("\tchown %u:%u %s\n",
2674                             ent->uid, ent->gid, fname);
2675
2676                 if (ent->flags & CE_NODUMP)
2677                         printf("\tchflags nodump %s\n", fname);
2678                 return;
2679         }
2680
2681         failed = chmod(fname, ent->permissions);
2682         if (failed) {
2683                 if (errno != EPERM)
2684                         err(1, "chmod(%s) in change_attrs", fname);
2685                 warn("change_attrs couldn't chmod(%s)", fname);
2686         }
2687
2688         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2689                 failed = chown(fname, ent->uid, ent->gid);
2690                 if (failed)
2691                         warn("can't chown %s", fname);
2692         }
2693
2694         if (ent->flags & CE_NODUMP) {
2695                 failed = chflags(fname, UF_NODUMP);
2696                 if (failed)
2697                         warn("can't chflags %s NODUMP", fname);
2698         }
2699 }
2700
2701 /*
2702  * Parse a signal number or signal name. Returns the signal number parsed or -1
2703  * on failure.
2704  */
2705 static int
2706 parse_signal(const char *str)
2707 {
2708         int sig, i;
2709         const char *errstr;
2710
2711         sig = strtonum(str, 1, sys_nsig - 1, &errstr);
2712
2713         if (errstr == NULL)
2714                 return (sig);
2715         if (strncasecmp(str, "SIG", 3) == 0)
2716                 str += 3;
2717
2718         for (i = 1; i < sys_nsig; i++) {
2719                 if (strcasecmp(str, sys_signame[i]) == 0)
2720                         return (i);
2721         }
2722
2723         return (-1);
2724 }