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 #ifndef COMPRESS_POSTFIX
  61 #define COMPRESS_POSTFIX ".gz"
  62 #endif
  63 #ifndef BZCOMPRESS_POSTFIX
  64 #define BZCOMPRESS_POSTFIX ".bz2"
  65 #endif
  66
  67 #include <sys/param.h>
  68 #include <sys/queue.h>
  69 #include <sys/stat.h>
  70 #include <sys/wait.h>
  71
  72 #include <ctype.h>
  73 #include <err.h>
  74 #include <errno.h>
  75 #include <fcntl.h>
  76 #include <fnmatch.h>
  77 #include <glob.h>
  78 #include <grp.h>
  79 #include <paths.h>
  80 #include <pwd.h>
  81 #include <signal.h>
  82 #include <stdio.h>
  83 #include <stdlib.h>
  84 #include <string.h>
  85 #include <time.h>
  86 #include <unistd.h>
  87
  88 #include "pathnames.h"
  89 #include "extern.h"
  90
  91 /* Define this symbol to try out the "new order" for work items. */
  92 #define TRY_NEWORDER
  93 #ifndef USE_NEWORDER
  94 #define USE_NEWORDER    1       /* Initial value for dbg_new_order */
  95 #endif
  96
  97 /*
  98  * Bit-values for the 'flags' parsed from a config-file entry.
  99  */
 100 #define CE_COMPACT      0x0001  /* Compact the achived log files with gzip. */
 101 #define CE_BZCOMPACT    0x0002  /* Compact the achived log files with bzip2. */
 102 #define CE_COMPACTWAIT  0x0004  /* wait until compressing one file finishes */
 103                                 /*    before starting the next step. */
 104 #define CE_BINARY       0x0008  /* Logfile is in binary, do not add status */
 105                                 /*    messages to logfile(s) when rotating. */
 106 #define CE_NOSIGNAL     0x0010  /* There is no process to signal when */
 107                                 /*    trimming this file. */
 108 #define CE_TRIMAT       0x0020  /* trim file at a specific time. */
 109 #define CE_GLOB         0x0040  /* name of the log is file name pattern. */
 110 #define CE_SIGNALGROUP  0x0080  /* Signal a process-group instead of a single */
 111                                 /*    process when trimming this file. */
 112 #define CE_CREATE       0x0100  /* Create the log file if it does not exist. */
 113 #define CE_NODUMP       0x0200  /* Set 'nodump' on newly created log file. */
 114
 115 #define MIN_PID         5       /* Don't touch pids lower than this */
 116 #define MAX_PID         99999   /* was lower, see /usr/include/sys/proc.h */
 117
 118 #define kbytes(size)  (((size) + 1023) >> 10)
 119
 120 #define DEFAULT_MARKER  "<default>"
 121 #define DEBUG_MARKER    "<debug>"
 122
 123 struct conf_entry {
 124         char *log;              /* Name of the log */
 125         char *pid_file;         /* PID file */
 126         char *r_reason;         /* The reason this file is being rotated */
 127         int firstcreate;        /* Creating log for the first time (-C). */
 128         int rotate;             /* Non-zero if this file should be rotated */
 129         int fsize;              /* size found for the log file */
 130         uid_t uid;              /* Owner of log */
 131         gid_t gid;              /* Group of log */
 132         int numlogs;            /* Number of logs to keep */
 133         int trsize;             /* Size cutoff to trigger trimming the log */
 134         int hours;              /* Hours between log trimming */
 135         struct ptime_data *trim_at;     /* Specific time to do trimming */
 136         unsigned int permissions;       /* File permissions on the log */
 137         int flags;              /* CE_COMPACT, CE_BZCOMPACT, CE_BINARY */
 138         int sig;                /* Signal to send */
 139         int def_cfg;            /* Using the <default> rule for this file */
 140         struct conf_entry *next;/* Linked list pointer */
 141 };
 142
 143 struct sigwork_entry {
 144         SLIST_ENTRY(sigwork_entry) sw_nextp;
 145         int      sw_signum;             /* the signal to send */
 146         int      sw_pidok;              /* true if pid value is valid */
 147         pid_t    sw_pid;                /* the process id from the PID file */
 148         const char *sw_pidtype;         /* "daemon" or "process group" */
 149         char     sw_fname[1];           /* file the PID was read from */
 150 };
 151
 152 struct zipwork_entry {
 153         SLIST_ENTRY(zipwork_entry) zw_nextp;
 154         const struct conf_entry *zw_conf;       /* for chown/perm/flag info */
 155         const struct sigwork_entry *zw_swork;   /* to know success of signal */
 156         int      zw_fsize;              /* size of the file to compress */
 157         char     zw_fname[1];           /* the file to compress */
 158 };
 159
 160 typedef enum {
 161         FREE_ENT, KEEP_ENT
 162 }       fk_entry;
 163
 164 SLIST_HEAD(swlisthead, sigwork_entry) swhead = SLIST_HEAD_INITIALIZER(swhead);
 165 SLIST_HEAD(zwlisthead, zipwork_entry) zwhead = SLIST_HEAD_INITIALIZER(zwhead);
 166
 167 int dbg_at_times;               /* -D Show details of 'trim_at' code */
 168 /*
 169  * The debug options "neworder" and "oldorder" can be used to change
 170  * which order work is done in.  Note that both options will disappear
 171  * in the near future, and the "new" order will be the only order.
 172  */
 173 int dbg_new_order = USE_NEWORDER;
 174
 175 int archtodir = 0;              /* Archive old logfiles to other directory */
 176 int createlogs;                 /* Create (non-GLOB) logfiles which do not */
 177                                 /*    already exist.  1=='for entries with */
 178                                 /*    C flag', 2=='for all entries'. */
 179 int verbose = 0;                /* Print out what's going on */
 180 int needroot = 1;               /* Root privs are necessary */
 181 int noaction = 0;               /* Don't do anything, just show it */
 182 int norotate = 0;               /* Don't rotate */
 183 int nosignal;                   /* Do not send any signals */
 184 int force = 0;                  /* Force the trim no matter what */
 185 int rotatereq = 0;              /* -R = Always rotate the file(s) as given */
 186                                 /*    on the command (this also requires   */
 187                                 /*    that a list of files *are* given on  */
 188                                 /*    the run command). */
 189 char *requestor;                /* The name given on a -R request */
 190 char *archdirname;              /* Directory path to old logfiles archive */
 191 char *destdir = NULL;           /* Directory to treat at root for logs */
 192 const char *conf;               /* Configuration file to use */
 193
 194 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */
 195 struct ptime_data *timenow;     /* The time to use for checking at-fields */
 196
 197 char hostname[MAXHOSTNAMELEN];  /* hostname */
 198 char daytime[16];               /* The current time in human readable form,
 199                                  * used for rotation-tracking messages. */
 200
 201 static struct conf_entry *get_worklist(char **files);
 202 static void parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p,
 203                 struct conf_entry **glob_p, struct conf_entry **defconf_p);
 204 static char *sob(char *p);
 205 static char *son(char *p);
 206 static int isnumberstr(const char *);
 207 static char *missing_field(char *p, char *errline);
 208 static void      change_attrs(const char *, const struct conf_entry *);
 209 static fk_entry  do_entry(struct conf_entry *);
 210 static fk_entry  do_rotate(const struct conf_entry *);
 211 #ifdef TRY_NEWORDER
 212 static void      do_sigwork(struct sigwork_entry *);
 213 static void      do_zipwork(struct zipwork_entry *);
 214 static struct sigwork_entry *
 215                  save_sigwork(const struct conf_entry *);
 216 static struct zipwork_entry *
 217                  save_zipwork(const struct conf_entry *, const struct
 218                     sigwork_entry *, int, const char *);
 219 static void      set_swpid(struct sigwork_entry *, const struct conf_entry *);
 220 #endif
 221 static int       sizefile(const char *);
 222 static void expand_globs(struct conf_entry **work_p,
 223                 struct conf_entry **glob_p);
 224 static void free_clist(struct conf_entry **firstent);
 225 static void free_entry(struct conf_entry *ent);
 226 static struct conf_entry *init_entry(const char *fname,
 227                 struct conf_entry *src_entry);
 228 static void parse_args(int argc, char **argv);
 229 static int parse_doption(const char *doption);
 230 static void usage(void);
 231 static int log_trim(const char *logname, const struct conf_entry *log_ent);
 232 static void compress_log(char *logname, int dowait);
 233 static void bzcompress_log(char *logname, int dowait);
 234 static int age_old_log(char *file);
 235 static int send_signal(const struct conf_entry *ent);
 236 static void savelog(char *from, char *to);
 237 static void createdir(const struct conf_entry *ent, char *dirpart);
 238 static void createlog(const struct conf_entry *ent);
 239
 240 /*
 241  * All the following take a parameter of 'int', but expect values in the
 242  * range of unsigned char.  Define wrappers which take values of type 'char',
 243  * whether signed or unsigned, and ensure they end up in the right range.
 244  */
 245 #define isdigitch(Anychar) isdigit((u_char)(Anychar))
 246 #define isprintch(Anychar) isprint((u_char)(Anychar))
 247 #define isspacech(Anychar) isspace((u_char)(Anychar))
 248 #define tolowerch(Anychar) tolower((u_char)(Anychar))
 249
 250 int
 251 main(int argc, char **argv)
 252 {
 253         fk_entry free_or_keep;
 254         struct conf_entry *p, *q;
 255 #ifdef TRY_NEWORDER
 256         struct sigwork_entry *stmp;
 257         struct zipwork_entry *ztmp;
 258 #endif
 259
 260         SLIST_INIT(&swhead);
 261         SLIST_INIT(&zwhead);
 262
 263         parse_args(argc, argv);
 264         argc -= optind;
 265         argv += optind;
 266
 267         if (needroot && getuid() && geteuid())
 268                 errx(1, "must have root privs");
 269         p = q = get_worklist(argv);
 270
 271         /*
 272          * Rotate all the files which need to be rotated.  Note that
 273          * some users have *hundreds* of entries in newsyslog.conf!
 274          */
 275         while (p) {
 276                 free_or_keep = do_entry(p);
 277                 p = p->next;
 278                 if (free_or_keep == FREE_ENT)
 279                         free_entry(q);
 280                 q = p;
 281         }
 282
 283 #ifdef TRY_NEWORDER
 284         /*
 285          * Send signals to any processes which need a signal to tell
 286          * them to close and re-open the log file(s) we have rotated.
 287          * Note that zipwork_entries include pointers to these
 288          * sigwork_entry's, so we can not free the entries here.
 289          */
 290         if (!SLIST_EMPTY(&swhead)) {
 291                 if (noaction || verbose)
 292                         printf("Signal all daemon process(es)...\n");
 293                 SLIST_FOREACH(stmp, &swhead, sw_nextp)
 294                         do_sigwork(stmp);
 295                 if (noaction)
 296                         printf("\tsleep 10\n");
 297                 else {
 298                         if (verbose)
 299                                 printf("Pause 10 seconds to allow daemon(s)"
 300                                     " to close log file(s)\n");
 301                         sleep(10);
 302                 }
 303         }
 304         /*
 305          * Compress all files that we're expected to compress, now
 306          * that all processes should have closed the files which
 307          * have been rotated.
 308          */
 309         if (!SLIST_EMPTY(&zwhead)) {
 310                 if (noaction || verbose)
 311                         printf("Compress all rotated log file(s)...\n");
 312                 while (!SLIST_EMPTY(&zwhead)) {
 313                         ztmp = SLIST_FIRST(&zwhead);
 314                         do_zipwork(ztmp);
 315                         SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
 316                         free(ztmp);
 317                 }
 318         }
 319         /* Now free all the sigwork entries. */
 320         while (!SLIST_EMPTY(&swhead)) {
 321                 stmp = SLIST_FIRST(&swhead);
 322                 SLIST_REMOVE_HEAD(&swhead, sw_nextp);
 323                 free(stmp);
 324         }
 325 #endif /* TRY_NEWORDER */
 326
 327         while (wait(NULL) > 0 || errno == EINTR)
 328                 ;
 329         return (0);
 330 }
 331
 332 static struct conf_entry *
 333 init_entry(const char *fname, struct conf_entry *src_entry)
 334 {
 335         struct conf_entry *tempwork;
 336
 337         if (verbose > 4)
 338                 printf("\t--> [creating entry for %s]\n", fname);
 339
 340         tempwork = malloc(sizeof(struct conf_entry));
 341         if (tempwork == NULL)
 342                 err(1, "malloc of conf_entry for %s", fname);
 343
 344         if (destdir == NULL || fname[0] != '/')
 345                 tempwork->log = strdup(fname);
 346         else
 347                 asprintf(&tempwork->log, "%s%s", destdir, fname);
 348         if (tempwork->log == NULL)
 349                 err(1, "strdup for %s", fname);
 350
 351         if (src_entry != NULL) {
 352                 tempwork->pid_file = NULL;
 353                 if (src_entry->pid_file)
 354                         tempwork->pid_file = strdup(src_entry->pid_file);
 355                 tempwork->r_reason = NULL;
 356                 tempwork->firstcreate = 0;
 357                 tempwork->rotate = 0;
 358                 tempwork->fsize = -1;
 359                 tempwork->uid = src_entry->uid;
 360                 tempwork->gid = src_entry->gid;
 361                 tempwork->numlogs = src_entry->numlogs;
 362                 tempwork->trsize = src_entry->trsize;
 363                 tempwork->hours = src_entry->hours;
 364                 tempwork->trim_at = NULL;
 365                 if (src_entry->trim_at != NULL)
 366                         tempwork->trim_at = ptime_init(src_entry->trim_at);
 367                 tempwork->permissions = src_entry->permissions;
 368                 tempwork->flags = src_entry->flags;
 369                 tempwork->sig = src_entry->sig;
 370                 tempwork->def_cfg = src_entry->def_cfg;
 371         } else {
 372                 /* Initialize as a "do-nothing" entry */
 373                 tempwork->pid_file = NULL;
 374                 tempwork->r_reason = NULL;
 375                 tempwork->firstcreate = 0;
 376                 tempwork->rotate = 0;
 377                 tempwork->fsize = -1;
 378                 tempwork->uid = (uid_t)-1;
 379                 tempwork->gid = (gid_t)-1;
 380                 tempwork->numlogs = 1;
 381                 tempwork->trsize = -1;
 382                 tempwork->hours = -1;
 383                 tempwork->trim_at = NULL;
 384                 tempwork->permissions = 0;
 385                 tempwork->flags = 0;
 386                 tempwork->sig = SIGHUP;
 387                 tempwork->def_cfg = 0;
 388         }
 389         tempwork->next = NULL;
 390
 391         return (tempwork);
 392 }
 393
 394 static void
 395 free_entry(struct conf_entry *ent)
 396 {
 397
 398         if (ent == NULL)
 399                 return;
 400
 401         if (ent->log != NULL) {
 402                 if (verbose > 4)
 403                         printf("\t--> [freeing entry for %s]\n", ent->log);
 404                 free(ent->log);
 405                 ent->log = NULL;
 406         }
 407
 408         if (ent->pid_file != NULL) {
 409                 free(ent->pid_file);
 410                 ent->pid_file = NULL;
 411         }
 412
 413         if (ent->r_reason != NULL) {
 414                 free(ent->r_reason);
 415                 ent->r_reason = NULL;
 416         }
 417
 418         if (ent->trim_at != NULL) {
 419                 ptime_free(ent->trim_at);
 420                 ent->trim_at = NULL;
 421         }
 422
 423         free(ent);
 424 }
 425
 426 static void
 427 free_clist(struct conf_entry **firstent)
 428 {
 429         struct conf_entry *ent, *nextent;
 430
 431         if (firstent == NULL)
 432                 return;                 /* There is nothing to do. */
 433
 434         ent = *firstent;
 435         firstent = NULL;
 436
 437         while (ent) {
 438                 nextent = ent->next;
 439                 free_entry(ent);
 440                 ent = nextent;
 441         }
 442 }
 443
 444 static fk_entry
 445 do_entry(struct conf_entry * ent)
 446 {
 447 #define REASON_MAX      80
 448         int modtime;
 449         fk_entry free_or_keep;
 450         double diffsecs;
 451         char temp_reason[REASON_MAX];
 452
 453         free_or_keep = FREE_ENT;
 454         if (verbose) {
 455                 if (ent->flags & CE_COMPACT)
 456                         printf("%s <%dZ>: ", ent->log, ent->numlogs);
 457                 else if (ent->flags & CE_BZCOMPACT)
 458                         printf("%s <%dJ>: ", ent->log, ent->numlogs);
 459                 else
 460                         printf("%s <%d>: ", ent->log, ent->numlogs);
 461         }
 462         ent->fsize = sizefile(ent->log);
 463         modtime = age_old_log(ent->log);
 464         ent->rotate = 0;
 465         ent->firstcreate = 0;
 466         if (ent->fsize < 0) {
 467                 /*
 468                  * If either the C flag or the -C option was specified,
 469                  * and if we won't be creating the file, then have the
 470                  * verbose message include a hint as to why the file
 471                  * will not be created.
 472                  */
 473                 temp_reason[0] = '\0';
 474                 if (createlogs > 1)
 475                         ent->firstcreate = 1;
 476                 else if ((ent->flags & CE_CREATE) && createlogs)
 477                         ent->firstcreate = 1;
 478                 else if (ent->flags & CE_CREATE)
 479                         strncpy(temp_reason, " (no -C option)", REASON_MAX);
 480                 else if (createlogs)
 481                         strncpy(temp_reason, " (no C flag)", REASON_MAX);
 482
 483                 if (ent->firstcreate) {
 484                         if (verbose)
 485                                 printf("does not exist -> will create.\n");
 486                         createlog(ent);
 487                 } else if (verbose) {
 488                         printf("does not exist, skipped%s.\n", temp_reason);
 489                 }
 490         } else {
 491                 if (ent->flags & CE_TRIMAT && !force && !rotatereq) {
 492                         diffsecs = ptimeget_diff(timenow, ent->trim_at);
 493                         if (diffsecs < 0.0) {
 494                                 /* trim_at is some time in the future. */
 495                                 if (verbose) {
 496                                         ptime_adjust4dst(ent->trim_at,
 497                                             timenow);
 498                                         printf("--> will trim at %s",
 499                                             ptimeget_ctime(ent->trim_at));
 500                                 }
 501                                 return (free_or_keep);
 502                         } else if (diffsecs >= 3600.0) {
 503                                 /*
 504                                  * trim_at is more than an hour in the past,
 505                                  * so find the next valid trim_at time, and
 506                                  * tell the user what that will be.
 507                                  */
 508                                 if (verbose && dbg_at_times)
 509                                         printf("\n\t--> prev trim at %s\t",
 510                                             ptimeget_ctime(ent->trim_at));
 511                                 if (verbose) {
 512                                         ptimeset_nxtime(ent->trim_at);
 513                                         printf("--> will trim at %s",
 514                                             ptimeget_ctime(ent->trim_at));
 515                                 }
 516                                 return (free_or_keep);
 517                         } else if (verbose && noaction && dbg_at_times) {
 518                                 /*
 519                                  * If we are just debugging at-times, then
 520                                  * a detailed message is helpful.  Also
 521                                  * skip "doing" any commands, since they
 522                                  * would all be turned off by no-action.
 523                                  */
 524                                 printf("\n\t--> timematch at %s",
 525                                     ptimeget_ctime(ent->trim_at));
 526                                 return (free_or_keep);
 527                         } else if (verbose && ent->hours <= 0) {
 528                                 printf("--> time is up\n");
 529                         }
 530                 }
 531                 if (verbose && (ent->trsize > 0))
 532                         printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
 533                 if (verbose && (ent->hours > 0))
 534                         printf(" age (hr): %d [%d] ", modtime, ent->hours);
 535
 536                 /*
 537                  * Figure out if this logfile needs to be rotated.
 538                  */
 539                 temp_reason[0] = '\0';
 540                 if (rotatereq) {
 541                         ent->rotate = 1;
 542                         snprintf(temp_reason, REASON_MAX, " due to -R from %s",
 543                             requestor);
 544                 } else if (force) {
 545                         ent->rotate = 1;
 546                         snprintf(temp_reason, REASON_MAX, " due to -F request");
 547                 } else if ((ent->trsize > 0) && (ent->fsize >= ent->trsize)) {
 548                         ent->rotate = 1;
 549                         snprintf(temp_reason, REASON_MAX, " due to size>%dK",
 550                             ent->trsize);
 551                 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
 552                         ent->rotate = 1;
 553                 } else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
 554                     (modtime < 0))) {
 555                         ent->rotate = 1;
 556                 }
 557
 558                 /*
 559                  * If the file needs to be rotated, then rotate it.
 560                  */
 561                 if (ent->rotate && !norotate) {
 562                         if (temp_reason[0] != '\0')
 563                                 ent->r_reason = strdup(temp_reason);
 564                         if (verbose)
 565                                 printf("--> trimming log....\n");
 566                         if (noaction && !verbose) {
 567                                 if (ent->flags & CE_COMPACT)
 568                                         printf("%s <%dZ>: trimming\n",
 569                                             ent->log, ent->numlogs);
 570                                 else if (ent->flags & CE_BZCOMPACT)
 571                                         printf("%s <%dJ>: trimming\n",
 572                                             ent->log, ent->numlogs);
 573                                 else
 574                                         printf("%s <%d>: trimming\n",
 575                                             ent->log, ent->numlogs);
 576                         }
 577                         free_or_keep = do_rotate(ent);
 578                 } else {
 579                         if (verbose)
 580                                 printf("--> skipping\n");
 581                 }
 582         }
 583         return (free_or_keep);
 584 #undef REASON_MAX
 585 }
 586
 587 /* Send a signal to the pid specified by pidfile */
 588 static int
 589 send_signal(const struct conf_entry *ent)
 590 {
 591         pid_t target_pid;
 592         int did_notify;
 593         FILE *f;
 594         long minok, maxok, rval;
 595         const char *target_name;
 596         char *endp, *linep, line[BUFSIZ];
 597
 598         did_notify = 0;
 599         f = fopen(ent->pid_file, "r");
 600         if (f == NULL) {
 601                 warn("can't open pid file: %s", ent->pid_file);
 602                 return (did_notify);
 603                 /* NOTREACHED */
 604         }
 605
 606         if (fgets(line, BUFSIZ, f) == NULL) {
 607                 /*
 608                  * XXX - If the pid file is empty, is that really a
 609                  *      problem?  Wouldn't that mean that the process
 610                  *      has shut down?  In that case there would be no
 611                  *      problem with compressing the rotated log file.
 612                  */
 613                 if (feof(f))
 614                         warnx("pid file is empty: %s",  ent->pid_file);
 615                 else
 616                         warn("can't read from pid file: %s", ent->pid_file);
 617                 (void) fclose(f);
 618                 return (did_notify);
 619                 /* NOTREACHED */
 620         }
 621         (void) fclose(f);
 622
 623         target_name = "daemon";
 624         minok = MIN_PID;
 625         maxok = MAX_PID;
 626         if (ent->flags & CE_SIGNALGROUP) {
 627                 /*
 628                  * If we are expected to signal a process-group when
 629                  * rotating this logfile, then the value read in should
 630                  * be the negative of a valid process ID.
 631                  */
 632                 target_name = "process-group";
 633                 minok = -MAX_PID;
 634                 maxok = -MIN_PID;
 635         }
 636
 637         errno = 0;
 638         linep = line;
 639         while (*linep == ' ')
 640                 linep++;
 641         rval = strtol(linep, &endp, 10);
 642         if (*endp != '\0' && !isspacech(*endp)) {
 643                 warnx("pid file does not start with a valid number: %s",
 644                     ent->pid_file);
 645                 rval = 0;
 646         } else if (rval < minok || rval > maxok) {
 647                 warnx("bad value '%ld' for process number in %s",
 648                     rval, ent->pid_file);
 649                 if (verbose)
 650                         warnx("\t(expecting value between %ld and %ld)",
 651                             minok, maxok);
 652                 rval = 0;
 653         }
 654         if (rval == 0) {
 655                 return (did_notify);
 656                 /* NOTREACHED */
 657         }
 658
 659         target_pid = rval;
 660
 661         if (noaction) {
 662                 did_notify = 1;
 663                 printf("\tkill -%d %d\n", ent->sig, (int) target_pid);
 664         } else if (kill(target_pid, ent->sig)) {
 665                 /*
 666                  * XXX - Iff the error was "no such process", should that
 667                  *      really be an error for us?  Perhaps the process
 668                  *      is already gone, in which case there would be no
 669                  *      problem with compressing the rotated log file.
 670                  */
 671                 warn("can't notify %s, pid %d", target_name,
 672                     (int) target_pid);
 673         } else {
 674                 did_notify = 1;
 675                 if (verbose)
 676                         printf("%s pid %d notified\n", target_name,
 677                             (int) target_pid);
 678         }
 679
 680         return (did_notify);
 681 }
 682
 683 static void
 684 parse_args(int argc, char **argv)
 685 {
 686         int ch;
 687         char *p;
 688
 689         timenow = ptime_init(NULL);
 690         ptimeset_time(timenow, time(NULL));
 691         (void)strncpy(daytime, ptimeget_ctime(timenow) + 4, 15);
 692         daytime[15] = '\0';
 693
 694         /* Let's get our hostname */
 695         (void)gethostname(hostname, sizeof(hostname));
 696
 697         /* Truncate domain */
 698         if ((p = strchr(hostname, '.')) != NULL)
 699                 *p = '\0';
 700
 701         /* Parse command line options. */
 702         while ((ch = getopt(argc, argv, "a:d:f:nrsvCD:FNR:")) != -1)
 703                 switch (ch) {
 704                 case 'a':
 705                         archtodir++;
 706                         archdirname = optarg;
 707                         break;
 708                 case 'd':
 709                         destdir = optarg;
 710                         break;
 711                 case 'f':
 712                         conf = optarg;
 713                         break;
 714                 case 'n':
 715                         noaction++;
 716                         break;
 717                 case 'r':
 718                         needroot = 0;
 719                         break;
 720                 case 's':
 721                         nosignal = 1;
 722                         break;
 723                 case 'v':
 724                         verbose++;
 725                         break;
 726                 case 'C':
 727                         /* Useful for things like rc.diskless... */
 728                         createlogs++;
 729                         break;
 730                 case 'D':
 731                         /*
 732                          * Set some debugging option.  The specific option
 733                          * depends on the value of optarg.  These options
 734                          * may come and go without notice or documentation.
 735                          */
 736                         if (parse_doption(optarg))
 737                                 break;
 738                         usage();
 739                         /* NOTREACHED */
 740                 case 'F':
 741                         force++;
 742                         break;
 743                 case 'N':
 744                         norotate++;
 745                         break;
 746                 case 'R':
 747                         rotatereq++;
 748                         requestor = strdup(optarg);
 749                         break;
 750                 case 'm':       /* Used by OpenBSD for "monitor mode" */
 751                 default:
 752                         usage();
 753                         /* NOTREACHED */
 754                 }
 755
 756         if (force && norotate) {
 757                 warnx("Only one of -F and -N may be specified.");
 758                 usage();
 759                 /* NOTREACHED */
 760         }
 761
 762         if (rotatereq) {
 763                 if (optind == argc) {
 764                         warnx("At least one filename must be given when -R is specified.");
 765                         usage();
 766                         /* NOTREACHED */
 767                 }
 768                 /* Make sure "requestor" value is safe for a syslog message. */
 769                 for (p = requestor; *p != '\0'; p++) {
 770                         if (!isprintch(*p) && (*p != '\t'))
 771                                 *p = '.';
 772                 }
 773         }
 774
 775         if (dbg_timenow) {
 776                 /*
 777                  * Note that the 'daytime' variable is not changed.
 778                  * That is only used in messages that track when a
 779                  * logfile is rotated, and if a file *is* rotated,
 780                  * then it will still rotated at the "real now" time.
 781                  */
 782                 ptime_free(timenow);
 783                 timenow = dbg_timenow;
 784                 fprintf(stderr, "Debug: Running as if TimeNow is %s",
 785                     ptimeget_ctime(dbg_timenow));
 786         }
 787
 788 }
 789
 790 /*
 791  * These debugging options are mainly meant for developer use, such
 792  * as writing regression-tests.  They would not be needed by users
 793  * during normal operation of newsyslog...
 794  */
 795 static int
 796 parse_doption(const char *doption)
 797 {
 798         const char TN[] = "TN=";
 799         int res;
 800
 801         if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
 802                 /*
 803                  * The "TimeNow" debugging option.  This might be off
 804                  * by an hour when crossing a timezone change.
 805                  */
 806                 dbg_timenow = ptime_init(NULL);
 807                 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
 808                     time(NULL), doption + sizeof(TN) - 1);
 809                 if (res == -2) {
 810                         warnx("Non-existent time specified on -D %s", doption);
 811                         return (0);                     /* failure */
 812                 } else if (res < 0) {
 813                         warnx("Malformed time given on -D %s", doption);
 814                         return (0);                     /* failure */
 815                 }
 816                 return (1);                     /* successfully parsed */
 817
 818         }
 819
 820         if (strcmp(doption, "ats") == 0) {
 821                 dbg_at_times++;
 822                 return (1);                     /* successfully parsed */
 823         }
 824
 825         if (strcmp(doption, "neworder") == 0) {
 826 #ifdef TRY_NEWORDER
 827                 dbg_new_order++;
 828 #else
 829                 warnx("NOTE: The code for 'neworder' was not compiled in.");
 830 #endif
 831                 return (1);                     /* successfully parsed */
 832         }
 833         if (strcmp(doption, "oldorder") == 0) {
 834 #ifdef TRY_NEWORDER
 835                 dbg_new_order = 0;
 836 #else
 837                 warnx("NOTE: The code for 'neworder' was not compiled in.");
 838 #endif
 839                 return (1);                     /* successfully parsed */
 840         }
 841
 842         warnx("Unknown -D (debug) option: '%s'", doption);
 843         return (0);                             /* failure */
 844 }
 845
 846 static void
 847 usage(void)
 848 {
 849
 850         fprintf(stderr,
 851             "usage: newsyslog [-CFNnrsv] [-a directory] [-d directory] [-f config-file]\n"
 852             "                 [ [-R requestor] filename ... ]\n");
 853         exit(1);
 854 }
 855
 856 /*
 857  * Parse a configuration file and return a linked list of all the logs
 858  * which should be processed.
 859  */
 860 static struct conf_entry *
 861 get_worklist(char **files)
 862 {
 863         FILE *f;
 864         const char *fname;
 865         char **given;
 866         struct conf_entry *defconf, *dupent, *ent, *firstnew;
 867         struct conf_entry *globlist, *lastnew, *worklist;
 868         int gmatch, fnres;
 869
 870         defconf = globlist = worklist = NULL;
 871
 872         fname = conf;
 873         if (fname == NULL)
 874                 fname = _PATH_CONF;
 875
 876         if (strcmp(fname, "-") != 0)
 877                 f = fopen(fname, "r");
 878         else {
 879                 f = stdin;
 880                 fname = "<stdin>";
 881         }
 882         if (!f)
 883                 err(1, "%s", conf);
 884
 885         parse_file(f, fname, &worklist, &globlist, &defconf);
 886         (void) fclose(f);
 887
 888         /*
 889          * All config-file information has been read in and turned into
 890          * a worklist and a globlist.  If there were no specific files
 891          * given on the run command, then the only thing left to do is to
 892          * call a routine which finds all files matched by the globlist
 893          * and adds them to the worklist.  Then return the worklist.
 894          */
 895         if (*files == NULL) {
 896                 expand_globs(&worklist, &globlist);
 897                 free_clist(&globlist);
 898                 if (defconf != NULL)
 899                         free_entry(defconf);
 900                 return (worklist);
 901                 /* NOTREACHED */
 902         }
 903
 904         /*
 905          * If newsyslog was given a specific list of files to process,
 906          * it may be that some of those files were not listed in any
 907          * config file.  Those unlisted files should get the default
 908          * rotation action.  First, create the default-rotation action
 909          * if none was found in a system config file.
 910          */
 911         if (defconf == NULL) {
 912                 defconf = init_entry(DEFAULT_MARKER, NULL);
 913                 defconf->numlogs = 3;
 914                 defconf->trsize = 50;
 915                 defconf->permissions = S_IRUSR|S_IWUSR;
 916         }
 917
 918         /*
 919          * If newsyslog was run with a list of specific filenames,
 920          * then create a new worklist which has only those files in
 921          * it, picking up the rotation-rules for those files from
 922          * the original worklist.
 923          *
 924          * XXX - Note that this will copy multiple rules for a single
 925          *      logfile, if multiple entries are an exact match for
 926          *      that file.  That matches the historic behavior, but do
 927          *      we want to continue to allow it?  If so, it should
 928          *      probably be handled more intelligently.
 929          */
 930         firstnew = lastnew = NULL;
 931         for (given = files; *given; ++given) {
 932                 /*
 933                  * First try to find exact-matches for this given file.
 934                  */
 935                 gmatch = 0;
 936                 for (ent = worklist; ent; ent = ent->next) {
 937                         if (strcmp(ent->log, *given) == 0) {
 938                                 gmatch++;
 939                                 dupent = init_entry(*given, ent);
 940                                 if (!firstnew)
 941                                         firstnew = dupent;
 942                                 else
 943                                         lastnew->next = dupent;
 944                                 lastnew = dupent;
 945                         }
 946                 }
 947                 if (gmatch) {
 948                         if (verbose > 2)
 949                                 printf("\t+ Matched entry %s\n", *given);
 950                         continue;
 951                 }
 952
 953                 /*
 954                  * There was no exact-match for this given file, so look
 955                  * for a "glob" entry which does match.
 956                  */
 957                 gmatch = 0;
 958                 if (verbose > 2 && globlist != NULL)
 959                         printf("\t+ Checking globs for %s\n", *given);
 960                 for (ent = globlist; ent; ent = ent->next) {
 961                         fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
 962                         if (verbose > 2)
 963                                 printf("\t+    = %d for pattern %s\n", fnres,
 964                                     ent->log);
 965                         if (fnres == 0) {
 966                                 gmatch++;
 967                                 dupent = init_entry(*given, ent);
 968                                 if (!firstnew)
 969                                         firstnew = dupent;
 970                                 else
 971                                         lastnew->next = dupent;
 972                                 lastnew = dupent;
 973                                 /* This new entry is not a glob! */
 974                                 dupent->flags &= ~CE_GLOB;
 975                                 /* Only allow a match to one glob-entry */
 976                                 break;
 977                         }
 978                 }
 979                 if (gmatch) {
 980                         if (verbose > 2)
 981                                 printf("\t+ Matched %s via %s\n", *given,
 982                                     ent->log);
 983                         continue;
 984                 }
 985
 986                 /*
 987                  * This given file was not found in any config file, so
 988                  * add a worklist item based on the default entry.
 989                  */
 990                 if (verbose > 2)
 991                         printf("\t+ No entry matched %s  (will use %s)\n",
 992                             *given, DEFAULT_MARKER);
 993                 dupent = init_entry(*given, defconf);
 994                 if (!firstnew)
 995                         firstnew = dupent;
 996                 else
 997                         lastnew->next = dupent;
 998                 /* Mark that it was *not* found in a config file */
 999                 dupent->def_cfg = 1;
1000                 lastnew = dupent;
1001         }
1002
1003         /*
1004          * Free all the entries in the original work list, the list of
1005          * glob entries, and the default entry.
1006          */
1007         free_clist(&worklist);
1008         free_clist(&globlist);
1009         free_entry(defconf);
1010
1011         /* And finally, return a worklist which matches the given files. */
1012         return (firstnew);
1013 }
1014
1015 /*
1016  * Expand the list of entries with filename patterns, and add all files
1017  * which match those glob-entries onto the worklist.
1018  */
1019 static void
1020 expand_globs(struct conf_entry **work_p, struct conf_entry **glob_p)
1021 {
1022         int gmatch, gres, i;
1023         char *mfname;
1024         struct conf_entry *dupent, *ent, *firstmatch, *globent;
1025         struct conf_entry *lastmatch;
1026         glob_t pglob;
1027         struct stat st_fm;
1028
1029         if ((glob_p == NULL) || (*glob_p == NULL))
1030                 return;                 /* There is nothing to do. */
1031
1032         /*
1033          * The worklist contains all fully-specified (non-GLOB) names.
1034          *
1035          * Now expand the list of filename-pattern (GLOB) entries into
1036          * a second list, which (by definition) will only match files
1037          * that already exist.  Do not add a glob-related entry for any
1038          * file which already exists in the fully-specified list.
1039          */
1040         firstmatch = lastmatch = NULL;
1041         for (globent = *glob_p; globent; globent = globent->next) {
1042
1043                 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
1044                 if (gres != 0) {
1045                         warn("cannot expand pattern (%d): %s", gres,
1046                             globent->log);
1047                         continue;
1048                 }
1049
1050                 if (verbose > 2)
1051                         printf("\t+ Expanding pattern %s\n", globent->log);
1052                 for (i = 0; i < pglob.gl_matchc; i++) {
1053                         mfname = pglob.gl_pathv[i];
1054
1055                         /* See if this file already has a specific entry. */
1056                         gmatch = 0;
1057                         for (ent = *work_p; ent; ent = ent->next) {
1058                                 if (strcmp(mfname, ent->log) == 0) {
1059                                         gmatch++;
1060                                         break;
1061                                 }
1062                         }
1063                         if (gmatch)
1064                                 continue;
1065
1066                         /* Make sure the named matched is a file. */
1067                         gres = lstat(mfname, &st_fm);
1068                         if (gres != 0) {
1069                                 /* Error on a file that glob() matched?!? */
1070                                 warn("Skipping %s - lstat() error", mfname);
1071                                 continue;
1072                         }
1073                         if (!S_ISREG(st_fm.st_mode)) {
1074                                 /* We only rotate files! */
1075                                 if (verbose > 2)
1076                                         printf("\t+  . skipping %s (!file)\n",
1077                                             mfname);
1078                                 continue;
1079                         }
1080
1081                         if (verbose > 2)
1082                                 printf("\t+  . add file %s\n", mfname);
1083                         dupent = init_entry(mfname, globent);
1084                         if (!firstmatch)
1085                                 firstmatch = dupent;
1086                         else
1087                                 lastmatch->next = dupent;
1088                         lastmatch = dupent;
1089                         /* This new entry is not a glob! */
1090                         dupent->flags &= ~CE_GLOB;
1091                 }
1092                 globfree(&pglob);
1093                 if (verbose > 2)
1094                         printf("\t+ Done with pattern %s\n", globent->log);
1095         }
1096
1097         /* Add the list of matched files to the end of the worklist. */
1098         if (!*work_p)
1099                 *work_p = firstmatch;
1100         else {
1101                 ent = *work_p;
1102                 while (ent->next)
1103                         ent = ent->next;
1104                 ent->next = firstmatch;
1105         }
1106
1107 }
1108
1109 /*
1110  * Parse a configuration file and update a linked list of all the logs to
1111  * process.
1112  */
1113 static void
1114 parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p,
1115     struct conf_entry **glob_p, struct conf_entry **defconf_p)
1116 {
1117         char line[BUFSIZ], *parse, *q;
1118         char *cp, *errline, *group;
1119         struct conf_entry *lastglob, *lastwork, *working;
1120         struct passwd *pwd;
1121         struct group *grp;
1122         int eol, ptm_opts, res, special;
1123
1124         /*
1125          * XXX - for now, assume that only one config file will be read,
1126          *      ie, this routine is only called one time.
1127          */
1128         lastglob = lastwork = NULL;
1129
1130         errline = NULL;
1131         while (fgets(line, BUFSIZ, cf)) {
1132                 if ((line[0] == '\n') || (line[0] == '#') ||
1133                     (strlen(line) == 0))
1134                         continue;
1135                 if (errline != NULL)
1136                         free(errline);
1137                 errline = strdup(line);
1138                 for (cp = line + 1; *cp != '\0'; cp++) {
1139                         if (*cp != '#')
1140                                 continue;
1141                         if (*(cp - 1) == '\\') {
1142                                 strcpy(cp - 1, cp);
1143                                 cp--;
1144                                 continue;
1145                         }
1146                         *cp = '\0';
1147                         break;
1148                 }
1149
1150                 q = parse = missing_field(sob(line), errline);
1151                 parse = son(line);
1152                 if (!*parse)
1153                         errx(1, "malformed line (missing fields):\n%s",
1154                             errline);
1155                 *parse = '\0';
1156
1157                 /*
1158                  * Allow people to set debug options via the config file.
1159                  * (NOTE: debug optons are undocumented, and may disappear
1160                  * at any time, etc).
1161                  */
1162                 if (strcasecmp(DEBUG_MARKER, q) == 0) {
1163                         q = parse = missing_field(sob(++parse), errline);
1164                         parse = son(parse);
1165                         if (!*parse)
1166                                 warnx("debug line specifies no option:\n%s",
1167                                     errline);
1168                         else {
1169                                 *parse = '\0';
1170                                 parse_doption(q);
1171                         }
1172                         continue;
1173                 }
1174
1175                 special = 0;
1176                 working = init_entry(q, NULL);
1177                 if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1178                         special = 1;
1179                         if (defconf_p == NULL) {
1180                                 warnx("Ignoring entry for %s in %s!", q,
1181                                     cfname);
1182                                 free_entry(working);
1183                                 continue;
1184                         } else if (*defconf_p != NULL) {
1185                                 warnx("Ignoring duplicate entry for %s!", q);
1186                                 free_entry(working);
1187                                 continue;
1188                         }
1189                         *defconf_p = working;
1190                 }
1191
1192                 q = parse = missing_field(sob(++parse), errline);
1193                 parse = son(parse);
1194                 if (!*parse)
1195                         errx(1, "malformed line (missing fields):\n%s",
1196                             errline);
1197                 *parse = '\0';
1198                 if ((group = strchr(q, ':')) != NULL ||
1199                     (group = strrchr(q, '.')) != NULL) {
1200                         *group++ = '\0';
1201                         if (*q) {
1202                                 if (!(isnumberstr(q))) {
1203                                         if ((pwd = getpwnam(q)) == NULL)
1204                                                 errx(1,
1205                                      "error in config file; unknown user:\n%s",
1206                                                     errline);
1207                                         working->uid = pwd->pw_uid;
1208                                 } else
1209                                         working->uid = atoi(q);
1210                         } else
1211                                 working->uid = (uid_t)-1;
1212
1213                         q = group;
1214                         if (*q) {
1215                                 if (!(isnumberstr(q))) {
1216                                         if ((grp = getgrnam(q)) == NULL)
1217                                                 errx(1,
1218                                     "error in config file; unknown group:\n%s",
1219                                                     errline);
1220                                         working->gid = grp->gr_gid;
1221                                 } else
1222                                         working->gid = atoi(q);
1223                         } else
1224                                 working->gid = (gid_t)-1;
1225
1226                         q = parse = missing_field(sob(++parse), errline);
1227                         parse = son(parse);
1228                         if (!*parse)
1229                                 errx(1, "malformed line (missing fields):\n%s",
1230                                     errline);
1231                         *parse = '\0';
1232                 } else {
1233                         working->uid = (uid_t)-1;
1234                         working->gid = (gid_t)-1;
1235                 }
1236
1237                 if (!sscanf(q, "%o", &working->permissions))
1238                         errx(1, "error in config file; bad permissions:\n%s",
1239                             errline);
1240
1241                 q = parse = missing_field(sob(++parse), errline);
1242                 parse = son(parse);
1243                 if (!*parse)
1244                         errx(1, "malformed line (missing fields):\n%s",
1245                             errline);
1246                 *parse = '\0';
1247                 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1248                         errx(1, "error in config file; bad value for count of logs to save:\n%s",
1249                             errline);
1250
1251                 q = parse = missing_field(sob(++parse), errline);
1252                 parse = son(parse);
1253                 if (!*parse)
1254                         errx(1, "malformed line (missing fields):\n%s",
1255                             errline);
1256                 *parse = '\0';
1257                 if (isdigitch(*q))
1258                         working->trsize = atoi(q);
1259                 else if (strcmp(q, "*") == 0)
1260                         working->trsize = -1;
1261                 else {
1262                         warnx("Invalid value of '%s' for 'size' in line:\n%s",
1263                             q, errline);
1264                         working->trsize = -1;
1265                 }
1266
1267                 working->flags = 0;
1268                 q = parse = missing_field(sob(++parse), errline);
1269                 parse = son(parse);
1270                 eol = !*parse;
1271                 *parse = '\0';
1272                 {
1273                         char *ep;
1274                         u_long ul;
1275
1276                         ul = strtoul(q, &ep, 10);
1277                         if (ep == q)
1278                                 working->hours = 0;
1279                         else if (*ep == '*')
1280                                 working->hours = -1;
1281                         else if (ul > INT_MAX)
1282                                 errx(1, "interval is too large:\n%s", errline);
1283                         else
1284                                 working->hours = ul;
1285
1286                         if (*ep == '\0' || strcmp(ep, "*") == 0)
1287                                 goto no_trimat;
1288                         if (*ep != '@' && *ep != '$')
1289                                 errx(1, "malformed interval/at:\n%s", errline);
1290
1291                         working->flags |= CE_TRIMAT;
1292                         working->trim_at = ptime_init(NULL);
1293                         ptm_opts = PTM_PARSE_ISO8601;
1294                         if (*ep == '$')
1295                                 ptm_opts = PTM_PARSE_DWM;
1296                         ptm_opts |= PTM_PARSE_MATCHDOM;
1297                         res = ptime_relparse(working->trim_at, ptm_opts,
1298                             ptimeget_secs(timenow), ep + 1);
1299                         if (res == -2)
1300                                 errx(1, "nonexistent time for 'at' value:\n%s",
1301                                     errline);
1302                         else if (res < 0)
1303                                 errx(1, "malformed 'at' value:\n%s", errline);
1304                 }
1305 no_trimat:
1306
1307                 if (eol)
1308                         q = NULL;
1309                 else {
1310                         q = parse = sob(++parse);       /* Optional field */
1311                         parse = son(parse);
1312                         if (!*parse)
1313                                 eol = 1;
1314                         *parse = '\0';
1315                 }
1316
1317                 for (; q && *q && !isspacech(*q); q++) {
1318                         switch (tolowerch(*q)) {
1319                         case 'b':
1320                                 working->flags |= CE_BINARY;
1321                                 break;
1322                         case 'c':
1323                                 /*
1324                                  * XXX -        Ick! Ugly! Remove ASAP!
1325                                  * We want `c' and `C' for "create".  But we
1326                                  * will temporarily treat `c' as `g', because
1327                                  * FreeBSD releases <= 4.8 have a typo of
1328                                  * checking  ('G' || 'c')  for CE_GLOB.
1329                                  */
1330                                 if (*q == 'c') {
1331                                         warnx("Assuming 'g' for 'c' in flags for line:\n%s",
1332                                             errline);
1333                                         warnx("The 'c' flag will eventually mean 'CREATE'");
1334                                         working->flags |= CE_GLOB;
1335                                         break;
1336                                 }
1337                                 working->flags |= CE_CREATE;
1338                                 break;
1339                         case 'd':
1340                                 working->flags |= CE_NODUMP;
1341                                 break;
1342                         case 'g':
1343                                 working->flags |= CE_GLOB;
1344                                 break;
1345                         case 'j':
1346                                 working->flags |= CE_BZCOMPACT;
1347                                 break;
1348                         case 'n':
1349                                 working->flags |= CE_NOSIGNAL;
1350                                 break;
1351                         case 'u':
1352                                 working->flags |= CE_SIGNALGROUP;
1353                                 break;
1354                         case 'w':
1355                                 working->flags |= CE_COMPACTWAIT;
1356                                 break;
1357                         case 'z':
1358                                 working->flags |= CE_COMPACT;
1359                                 break;
1360                         case '-':
1361                                 break;
1362                         case 'f':       /* Used by OpenBSD for "CE_FOLLOW" */
1363                         case 'm':       /* Used by OpenBSD for "CE_MONITOR" */
1364                         case 'p':       /* Used by NetBSD  for "CE_PLAIN0" */
1365                         default:
1366                                 errx(1, "illegal flag in config file -- %c",
1367                                     *q);
1368                         }
1369                 }
1370
1371                 if (eol)
1372                         q = NULL;
1373                 else {
1374                         q = parse = sob(++parse);       /* Optional field */
1375                         parse = son(parse);
1376                         if (!*parse)
1377                                 eol = 1;
1378                         *parse = '\0';
1379                 }
1380
1381                 working->pid_file = NULL;
1382                 if (q && *q) {
1383                         if (*q == '/')
1384                                 working->pid_file = strdup(q);
1385                         else if (isdigit(*q))
1386                                 goto got_sig;
1387                         else
1388                                 errx(1,
1389                         "illegal pid file or signal number in config file:\n%s",
1390                                     errline);
1391                 }
1392                 if (eol)
1393                         q = NULL;
1394                 else {
1395                         q = parse = sob(++parse);       /* Optional field */
1396                         *(parse = son(parse)) = '\0';
1397                 }
1398
1399                 working->sig = SIGHUP;
1400                 if (q && *q) {
1401                         if (isdigit(*q)) {
1402                 got_sig:
1403                                 working->sig = atoi(q);
1404                         } else {
1405                 err_sig:
1406                                 errx(1,
1407                                     "illegal signal number in config file:\n%s",
1408                                     errline);
1409                         }
1410                         if (working->sig < 1 || working->sig >= NSIG)
1411                                 goto err_sig;
1412                 }
1413
1414                 /*
1415                  * Finish figuring out what pid-file to use (if any) in
1416                  * later processing if this logfile needs to be rotated.
1417                  */
1418                 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1419                         /*
1420                          * This config-entry specified 'n' for nosignal,
1421                          * see if it also specified an explicit pid_file.
1422                          * This would be a pretty pointless combination.
1423                          */
1424                         if (working->pid_file != NULL) {
1425                                 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1426                                     working->pid_file, errline);
1427                                 free(working->pid_file);
1428                                 working->pid_file = NULL;
1429                         }
1430                 } else if (working->pid_file == NULL) {
1431                         /*
1432                          * This entry did not specify the 'n' flag, which
1433                          * means it should signal syslogd unless it had
1434                          * specified some other pid-file (and obviously the
1435                          * syslog pid-file will not be for a process-group).
1436                          * Also, we should only try to notify syslog if we
1437                          * are root.
1438                          */
1439                         if (working->flags & CE_SIGNALGROUP) {
1440                                 warnx("Ignoring flag 'U' in line:\n%s",
1441                                     errline);
1442                                 working->flags &= ~CE_SIGNALGROUP;
1443                         }
1444                         if (needroot)
1445                                 working->pid_file = strdup(_PATH_SYSLOGPID);
1446                 }
1447
1448                 /*
1449                  * Add this entry to the appropriate list of entries, unless
1450                  * it was some kind of special entry (eg: <default>).
1451                  */
1452                 if (special) {
1453                         ;                       /* Do not add to any list */
1454                 } else if (working->flags & CE_GLOB) {
1455                         if (!*glob_p)
1456                                 *glob_p = working;
1457                         else
1458                                 lastglob->next = working;
1459                         lastglob = working;
1460                 } else {
1461                         if (!*work_p)
1462                                 *work_p = working;
1463                         else
1464                                 lastwork->next = working;
1465                         lastwork = working;
1466                 }
1467         }
1468         if (errline != NULL)
1469                 free(errline);
1470 }
1471
1472 static char *
1473 missing_field(char *p, char *errline)
1474 {
1475
1476         if (!p || !*p)
1477                 errx(1, "missing field in config file:\n%s", errline);
1478         return (p);
1479 }
1480
1481 static fk_entry
1482 do_rotate(const struct conf_entry *ent)
1483 {
1484         char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1485         char file1[MAXPATHLEN], file2[MAXPATHLEN];
1486         char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1487         char jfile1[MAXPATHLEN];
1488         int flags, notified, need_notification, numlogs_c;
1489         fk_entry free_or_keep;
1490         struct stat st;
1491
1492         flags = ent->flags;
1493         free_or_keep = FREE_ENT;
1494
1495         if (archtodir) {
1496                 char *p;
1497
1498                 /* build complete name of archive directory into dirpart */
1499                 if (*archdirname == '/') {      /* absolute */
1500                         strlcpy(dirpart, archdirname, sizeof(dirpart));
1501                 } else {        /* relative */
1502                         /* get directory part of logfile */
1503                         strlcpy(dirpart, ent->log, sizeof(dirpart));
1504                         if ((p = rindex(dirpart, '/')) == NULL)
1505                                 dirpart[0] = '\0';
1506                         else
1507                                 *(p + 1) = '\0';
1508                         strlcat(dirpart, archdirname, sizeof(dirpart));
1509                 }
1510
1511                 /* check if archive directory exists, if not, create it */
1512                 if (lstat(dirpart, &st))
1513                         createdir(ent, dirpart);
1514
1515                 /* get filename part of logfile */
1516                 if ((p = rindex(ent->log, '/')) == NULL)
1517                         strlcpy(namepart, ent->log, sizeof(namepart));
1518                 else
1519                         strlcpy(namepart, p + 1, sizeof(namepart));
1520
1521                 /* name of oldest log */
1522                 (void) snprintf(file1, sizeof(file1), "%s/%s.%d", dirpart,
1523                     namepart, ent->numlogs);
1524                 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1525                     COMPRESS_POSTFIX);
1526                 snprintf(jfile1, sizeof(jfile1), "%s%s", file1,
1527                     BZCOMPRESS_POSTFIX);
1528         } else {
1529                 /* name of oldest log */
1530                 (void) snprintf(file1, sizeof(file1), "%s.%d", ent->log,
1531                     ent->numlogs);
1532                 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1533                     COMPRESS_POSTFIX);
1534                 snprintf(jfile1, sizeof(jfile1), "%s%s", file1,
1535                     BZCOMPRESS_POSTFIX);
1536         }
1537
1538         if (noaction) {
1539                 printf("\trm -f %s\n", file1);
1540                 printf("\trm -f %s\n", zfile1);
1541                 printf("\trm -f %s\n", jfile1);
1542         } else {
1543                 (void) unlink(file1);
1544                 (void) unlink(zfile1);
1545                 (void) unlink(jfile1);
1546         }
1547
1548         /* Move down log files */
1549         numlogs_c = ent->numlogs;               /* copy for countdown */
1550         while (numlogs_c--) {
1551
1552                 (void) strlcpy(file2, file1, sizeof(file2));
1553
1554                 if (archtodir)
1555                         (void) snprintf(file1, sizeof(file1), "%s/%s.%d",
1556                             dirpart, namepart, numlogs_c);
1557                 else
1558                         (void) snprintf(file1, sizeof(file1), "%s.%d",
1559                             ent->log, numlogs_c);
1560
1561                 (void) strlcpy(zfile1, file1, sizeof(zfile1));
1562                 (void) strlcpy(zfile2, file2, sizeof(zfile2));
1563                 if (lstat(file1, &st)) {
1564                         (void) strlcat(zfile1, COMPRESS_POSTFIX,
1565                             sizeof(zfile1));
1566                         (void) strlcat(zfile2, COMPRESS_POSTFIX,
1567                             sizeof(zfile2));
1568                         if (lstat(zfile1, &st)) {
1569                                 strlcpy(zfile1, file1, sizeof(zfile1));
1570                                 strlcpy(zfile2, file2, sizeof(zfile2));
1571                                 strlcat(zfile1, BZCOMPRESS_POSTFIX,
1572                                     sizeof(zfile1));
1573                                 strlcat(zfile2, BZCOMPRESS_POSTFIX,
1574                                     sizeof(zfile2));
1575                                 if (lstat(zfile1, &st))
1576                                         continue;
1577                         }
1578                 }
1579                 if (noaction)
1580                         printf("\tmv %s %s\n", zfile1, zfile2);
1581                 else {
1582                         /* XXX - Ought to be checking for failure! */
1583                         (void)rename(zfile1, zfile2);
1584                 }
1585                 change_attrs(zfile2, ent);
1586         }
1587
1588         if (ent->numlogs > 0) {
1589                 if (noaction) {
1590                         /*
1591                          * Note that savelog() may succeed with using link()
1592                          * for the archtodir case, but there is no good way
1593                          * of knowing if it will when doing "noaction", so
1594                          * here we claim that it will have to do a copy...
1595                          */
1596                         if (archtodir)
1597                                 printf("\tcp %s %s\n", ent->log, file1);
1598                         else
1599                                 printf("\tln %s %s\n", ent->log, file1);
1600                 } else {
1601                         if (!(flags & CE_BINARY)) {
1602                                 /* Report the trimming to the old log */
1603                                 log_trim(ent->log, ent);
1604                         }
1605                         savelog(ent->log, file1);
1606                 }
1607                 change_attrs(file1, ent);
1608         }
1609
1610         /* Create the new log file and move it into place */
1611         if (noaction)
1612                 printf("Start new log...\n");
1613         createlog(ent);
1614
1615 #ifdef TRY_NEWORDER
1616         /*
1617          * Save all signalling and file-compression to be done after log
1618          * files from all entries have been rotated.  This way any one
1619          * process will not be sent the same signal multiple times when
1620          * multiple log files had to be rotated.
1621          */
1622         if (dbg_new_order) {
1623                 struct sigwork_entry *swork;
1624
1625                 swork = NULL;
1626                 if (ent->pid_file != NULL)
1627                         swork = save_sigwork(ent);
1628                 if (ent->numlogs > 0 && (flags & (CE_COMPACT | CE_BZCOMPACT))) {
1629                         /*
1630                          * The zipwork_entry will include a pointer to this
1631                          * conf_entry, so the conf_entry should not be freed.
1632                          */
1633                         free_or_keep = KEEP_ENT;
1634                         save_zipwork(ent, swork, ent->fsize, file1);
1635                 }
1636                 return (free_or_keep);
1637         }
1638 #endif /* TRY_NEWORDER */
1639
1640         /*
1641          * Find out if there is a process to signal.  If nosignal (-s) was
1642          * specified, then do not signal any process.  Note that nosignal
1643          * will trigger a warning message if the rotated logfile needs to
1644          * be compressed, *unless* -R was specified.  This is because there
1645          * presumably still are process(es) writing to the old logfile, but
1646          * we assume that a -sR request comes from a process which writes
1647          * to the logfile, and as such, that process has already made sure
1648          * that the logfile is not presently in use.
1649          */
1650         need_notification = notified = 0;
1651         if (ent->pid_file != NULL) {
1652                 need_notification = 1;
1653                 if (!nosignal)
1654                         notified = send_signal(ent);    /* the normal case! */
1655                 else if (rotatereq)
1656                         need_notification = 0;
1657         }
1658
1659         if ((flags & CE_COMPACT) || (flags & CE_BZCOMPACT)) {
1660                 if (need_notification && !notified)
1661                         warnx(
1662                             "log %s.0 not compressed because daemon(s) not notified",
1663                             ent->log);
1664                 else if (noaction) {
1665                         printf("\tsleep 10\n");
1666                         if (flags & CE_COMPACT)
1667                                 printf("\tgzip %s.0\n", ent->log);
1668                         else
1669                                 printf("\tbzip2 %s.0\n", ent->log);
1670                 } else {
1671                         if (notified) {
1672                                 if (verbose)
1673                                         printf("small pause to allow daemon(s) to close log\n");
1674                                 sleep(10);
1675                         }
1676                         if (archtodir) {
1677                                 (void) snprintf(file1, sizeof(file1), "%s/%s",
1678                                     dirpart, namepart);
1679                                 if (flags & CE_COMPACT)
1680                                         compress_log(file1,
1681                                             flags & CE_COMPACTWAIT);
1682                                 else if (flags & CE_BZCOMPACT)
1683                                         bzcompress_log(file1,
1684                                             flags & CE_COMPACTWAIT);
1685                         } else {
1686                                 if (flags & CE_COMPACT)
1687                                         compress_log(ent->log,
1688                                             flags & CE_COMPACTWAIT);
1689                                 else if (flags & CE_BZCOMPACT)
1690                                         bzcompress_log(ent->log,
1691                                             flags & CE_COMPACTWAIT);
1692                         }
1693                 }
1694         }
1695         return (free_or_keep);
1696 }
1697
1698 #ifdef TRY_NEWORDER
1699 static void
1700 do_sigwork(struct sigwork_entry *swork)
1701 {
1702         struct sigwork_entry *nextsig;
1703         int kres, secs;
1704
1705         if (!(swork->sw_pidok) || swork->sw_pid == 0)
1706                 return;                 /* no work to do... */
1707
1708         /*
1709          * If nosignal (-s) was specified, then do not signal any process.
1710          * Note that a nosignal request triggers a warning message if the
1711          * rotated logfile needs to be compressed, *unless* -R was also
1712          * specified.  We assume that an `-sR' request came from a process
1713          * which writes to the logfile, and as such, we assume that process
1714          * has already made sure the logfile is not presently in use.  This
1715          * just sets swork->sw_pidok to a special value, and do_zipwork
1716          * will print any necessary warning(s).
1717          */
1718         if (nosignal) {
1719                 if (!rotatereq)
1720                         swork->sw_pidok = -1;
1721                 return;
1722         }
1723
1724         /*
1725          * Compute the pause between consecutive signals.  Use a longer
1726          * sleep time if we will be sending two signals to the same
1727          * deamon or process-group.
1728          */
1729         secs = 0;
1730         nextsig = SLIST_NEXT(swork, sw_nextp);
1731         if (nextsig != NULL) {
1732                 if (swork->sw_pid == nextsig->sw_pid)
1733                         secs = 10;
1734                 else
1735                         secs = 1;
1736         }
1737
1738         if (noaction) {
1739                 printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1740                     (int)swork->sw_pid, swork->sw_fname);
1741                 if (secs > 0)
1742                         printf("\tsleep %d\n", secs);
1743                 return;
1744         }
1745
1746         kres = kill(swork->sw_pid, swork->sw_signum);
1747         if (kres != 0) {
1748                 /*
1749                  * Assume that "no such process" (ESRCH) is something
1750                  * to warn about, but is not an error.  Presumably the
1751                  * process which writes to the rotated log file(s) is
1752                  * gone, in which case we should have no problem with
1753                  * compressing the rotated log file(s).
1754                  */
1755                 if (errno != ESRCH)
1756                         swork->sw_pidok = 0;
1757                 warn("can't notify %s, pid %d", swork->sw_pidtype,
1758                     (int)swork->sw_pid);
1759         } else {
1760                 if (verbose)
1761                         printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
1762                             (int)swork->sw_pid, swork->sw_fname);
1763                 if (secs > 0) {
1764                         if (verbose)
1765                                 printf("Pause %d second(s) between signals\n",
1766                                     secs);
1767                         sleep(secs);
1768                 }
1769         }
1770 }
1771
1772 static void
1773 do_zipwork(struct zipwork_entry *zwork)
1774 {
1775         const char *pgm_name, *pgm_path;
1776         int zstatus;
1777         pid_t pidzip, wpid;
1778         char zresult[MAXPATHLEN];
1779
1780         pgm_path = NULL;
1781         strlcpy(zresult, zwork->zw_fname, sizeof(zresult));
1782         if (zwork != NULL && zwork->zw_conf != NULL) {
1783                 if (zwork->zw_conf->flags & CE_COMPACT) {
1784                         pgm_path = _PATH_GZIP;
1785                         strlcat(zresult, COMPRESS_POSTFIX, sizeof(zresult));
1786                 } else if (zwork->zw_conf->flags & CE_BZCOMPACT) {
1787                         pgm_path = _PATH_BZIP2;
1788                         strlcat(zresult, BZCOMPRESS_POSTFIX, sizeof(zresult));
1789                 }
1790         }
1791         if (pgm_path == NULL) {
1792                 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname);
1793                 return;
1794         }
1795
1796         if (zwork->zw_swork != NULL && zwork->zw_swork->sw_pidok <= 0) {
1797                 warnx(
1798                     "log %s not compressed because daemon(s) not notified",
1799                     zwork->zw_fname);
1800                 change_attrs(zwork->zw_fname, zwork->zw_conf);
1801                 return;
1802         }
1803
1804         if (noaction) {
1805                 pgm_name = strrchr(pgm_path, '/');
1806                 if (pgm_name == NULL)
1807                         pgm_name = pgm_path;
1808                 else
1809                         pgm_name++;
1810                 printf("\t%s %s\n", pgm_name, zwork->zw_fname);
1811                 change_attrs(zresult, zwork->zw_conf);
1812                 return;
1813         }
1814
1815         pidzip = fork();
1816         if (pidzip < 0)
1817                 err(1, "gzip fork");
1818         else if (!pidzip) {
1819                 /* The child process executes the compression command */
1820                 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0);
1821                 err(1, "%s", pgm_path);
1822         }
1823
1824         wpid = waitpid(pidzip, &zstatus, 0);
1825         if (wpid == -1) {
1826                 warn("%s: waitpid(%d)", pgm_path, pidzip);
1827                 return;
1828         }
1829         if (!WIFEXITED(zstatus)) {
1830                 warn("%s: did not terminate normally", pgm_path);
1831                 return;
1832         }
1833         if (WEXITSTATUS(zstatus)) {
1834                 warn("%s: terminated with %d (non-zero) status",
1835                     pgm_path, WEXITSTATUS(zstatus));
1836                 return;
1837         }
1838
1839         /* Compression was successful, set file attributes on the result. */
1840         change_attrs(zresult, zwork->zw_conf);
1841 }
1842
1843 /*
1844  * Save information on any process we need to signal.  Any single
1845  * process may need to be sent different signal-values for different
1846  * log files, but usually a single signal-value will cause the process
1847  * to close and re-open all of it's log files.
1848  */
1849 static struct sigwork_entry *
1850 save_sigwork(const struct conf_entry *ent)
1851 {
1852         struct sigwork_entry *sprev, *stmp;
1853         int ndiff;
1854         size_t tmpsiz;
1855
1856         sprev = NULL;
1857         ndiff = 1;
1858         SLIST_FOREACH(stmp, &swhead, sw_nextp) {
1859                 ndiff = strcmp(ent->pid_file, stmp->sw_fname);
1860                 if (ndiff > 0)
1861                         break;
1862                 if (ndiff == 0) {
1863                         if (ent->sig == stmp->sw_signum)
1864                                 break;
1865                         if (ent->sig > stmp->sw_signum) {
1866                                 ndiff = 1;
1867                                 break;
1868                         }
1869                 }
1870                 sprev = stmp;
1871         }
1872         if (stmp != NULL && ndiff == 0)
1873                 return (stmp);
1874
1875         tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_file) + 1;
1876         stmp = malloc(tmpsiz);
1877         set_swpid(stmp, ent);
1878         stmp->sw_signum = ent->sig;
1879         strcpy(stmp->sw_fname, ent->pid_file);
1880         if (sprev == NULL)
1881                 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
1882         else
1883                 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
1884         return (stmp);
1885 }
1886
1887 /*
1888  * Save information on any file we need to compress.  We may see the same
1889  * file multiple times, so check the full list to avoid duplicates.  The
1890  * list itself is sorted smallest-to-largest, because that's the order we
1891  * want to compress the files.  If the partition is very low on disk space,
1892  * then the smallest files are the most likely to compress, and compressing
1893  * them first will free up more space for the larger files.
1894  */
1895 static struct zipwork_entry *
1896 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
1897     int zsize, const char *zipfname)
1898 {
1899         struct zipwork_entry *zprev, *ztmp;
1900         int ndiff;
1901         size_t tmpsiz;
1902
1903         /* Compute the size if the caller did not know it. */
1904         if (zsize < 0)
1905                 zsize = sizefile(zipfname);
1906
1907         zprev = NULL;
1908         ndiff = 1;
1909         SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
1910                 ndiff = strcmp(zipfname, ztmp->zw_fname);
1911                 if (ndiff == 0)
1912                         break;
1913                 if (zsize > ztmp->zw_fsize)
1914                         zprev = ztmp;
1915         }
1916         if (ztmp != NULL && ndiff == 0)
1917                 return (ztmp);
1918
1919         tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
1920         ztmp = malloc(tmpsiz);
1921         ztmp->zw_conf = ent;
1922         ztmp->zw_swork = swork;
1923         ztmp->zw_fsize = zsize;
1924         strcpy(ztmp->zw_fname, zipfname);
1925         if (zprev == NULL)
1926                 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
1927         else
1928                 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
1929         return (ztmp);
1930 }
1931
1932 /* Send a signal to the pid specified by pidfile */
1933 static void
1934 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
1935 {
1936         FILE *f;
1937         long minok, maxok, rval;
1938         char *endp, *linep, line[BUFSIZ];
1939
1940         minok = MIN_PID;
1941         maxok = MAX_PID;
1942         swork->sw_pidok = 0;
1943         swork->sw_pid = 0;
1944         swork->sw_pidtype = "daemon";
1945         if (ent->flags & CE_SIGNALGROUP) {
1946                 /*
1947                  * If we are expected to signal a process-group when
1948                  * rotating this logfile, then the value read in should
1949                  * be the negative of a valid process ID.
1950                  */
1951                 minok = -MAX_PID;
1952                 maxok = -MIN_PID;
1953                 swork->sw_pidtype = "process-group";
1954         }
1955
1956         f = fopen(ent->pid_file, "r");
1957         if (f == NULL) {
1958                 warn("can't open pid file: %s", ent->pid_file);
1959                 return;
1960         }
1961
1962         if (fgets(line, BUFSIZ, f) == NULL) {
1963                 /*
1964                  * Warn if the PID file is empty, but do not consider
1965                  * it an error.  Most likely it means the process has
1966                  * has terminated, so it should be safe to rotate any
1967                  * log files that the process would have been using.
1968                  */
1969                 if (feof(f)) {
1970                         swork->sw_pidok = 1;
1971                         warnx("pid file is empty: %s", ent->pid_file);
1972                 } else
1973                         warn("can't read from pid file: %s", ent->pid_file);
1974                 (void)fclose(f);
1975                 return;
1976         }
1977         (void)fclose(f);
1978
1979         errno = 0;
1980         linep = line;
1981         while (*linep == ' ')
1982                 linep++;
1983         rval = strtol(linep, &endp, 10);
1984         if (*endp != '\0' && !isspacech(*endp)) {
1985                 warnx("pid file does not start with a valid number: %s",
1986                     ent->pid_file);
1987         } else if (rval < minok || rval > maxok) {
1988                 warnx("bad value '%ld' for process number in %s",
1989                     rval, ent->pid_file);
1990                 if (verbose)
1991                         warnx("\t(expecting value between %ld and %ld)",
1992                             minok, maxok);
1993         } else {
1994                 swork->sw_pidok = 1;
1995                 swork->sw_pid = rval;
1996         }
1997
1998         return;
1999 }
2000 #endif /* TRY_NEWORDER */
2001
2002 /* Log the fact that the logs were turned over */
2003 static int
2004 log_trim(const char *logname, const struct conf_entry *log_ent)
2005 {
2006         FILE *f;
2007         const char *xtra;
2008
2009         if ((f = fopen(logname, "a")) == NULL)
2010                 return (-1);
2011         xtra = "";
2012         if (log_ent->def_cfg)
2013                 xtra = " using <default> rule";
2014         if (log_ent->firstcreate)
2015                 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n",
2016                     daytime, hostname, (int) getpid(), xtra);
2017         else if (log_ent->r_reason != NULL)
2018                 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n",
2019                     daytime, hostname, (int) getpid(), log_ent->r_reason, xtra);
2020         else
2021                 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n",
2022                     daytime, hostname, (int) getpid(), xtra);
2023         if (fclose(f) == EOF)
2024                 err(1, "log_trim: fclose");
2025         return (0);
2026 }
2027
2028 /*
2029  * XXX - Note that both compress_log and bzcompress_log will lose the
2030  *      NODUMP flag if it was set on somelog.0.  Fixing that in newsyslog
2031  *      (as opposed to fixing gzip/bzip2) will require some restructuring
2032  *      of the code.  That restructuring is planned for a later update...
2033  */
2034 /* Fork of gzip to compress the old log file */
2035 static void
2036 compress_log(char *logname, int dowait)
2037 {
2038         pid_t pid;
2039         char tmp[MAXPATHLEN];
2040
2041         while (dowait && (wait(NULL) > 0 || errno == EINTR))
2042                 ;
2043         (void) snprintf(tmp, sizeof(tmp), "%s.0", logname);
2044         pid = fork();
2045         if (pid < 0)
2046                 err(1, "gzip fork");
2047         else if (!pid) {
2048                 (void) execl(_PATH_GZIP, _PATH_GZIP, "-f", tmp, (char *)0);
2049                 err(1, _PATH_GZIP);
2050         }
2051 }
2052
2053 /* Fork of bzip2 to compress the old log file */
2054 static void
2055 bzcompress_log(char *logname, int dowait)
2056 {
2057         pid_t pid;
2058         char tmp[MAXPATHLEN];
2059
2060         while (dowait && (wait(NULL) > 0 || errno == EINTR))
2061                 ;
2062         snprintf(tmp, sizeof(tmp), "%s.0", logname);
2063         pid = fork();
2064         if (pid < 0)
2065                 err(1, "bzip2 fork");
2066         else if (!pid) {
2067                 execl(_PATH_BZIP2, _PATH_BZIP2, "-f", tmp, (char *)0);
2068                 err(1, _PATH_BZIP2);
2069         }
2070 }
2071
2072 /* Return size in kilobytes of a file */
2073 static int
2074 sizefile(const char *file)
2075 {
2076         struct stat sb;
2077
2078         if (stat(file, &sb) < 0)
2079                 return (-1);
2080         return (kbytes(dbtob(sb.st_blocks)));
2081 }
2082
2083 /* Return the age of old log file (file.0) */
2084 static int
2085 age_old_log(char *file)
2086 {
2087         struct stat sb;
2088         char *endp;
2089         char tmp[MAXPATHLEN + sizeof(".0") + sizeof(COMPRESS_POSTFIX) +
2090                 sizeof(BZCOMPRESS_POSTFIX) + 1];
2091
2092         if (archtodir) {
2093                 char *p;
2094
2095                 /* build name of archive directory into tmp */
2096                 if (*archdirname == '/') {      /* absolute */
2097                         strlcpy(tmp, archdirname, sizeof(tmp));
2098                 } else {        /* relative */
2099                         /* get directory part of logfile */
2100                         strlcpy(tmp, file, sizeof(tmp));
2101                         if ((p = rindex(tmp, '/')) == NULL)
2102                                 tmp[0] = '\0';
2103                         else
2104                                 *(p + 1) = '\0';
2105                         strlcat(tmp, archdirname, sizeof(tmp));
2106                 }
2107
2108                 strlcat(tmp, "/", sizeof(tmp));
2109
2110                 /* get filename part of logfile */
2111                 if ((p = rindex(file, '/')) == NULL)
2112                         strlcat(tmp, file, sizeof(tmp));
2113                 else
2114                         strlcat(tmp, p + 1, sizeof(tmp));
2115         } else {
2116                 (void) strlcpy(tmp, file, sizeof(tmp));
2117         }
2118
2119         strlcat(tmp, ".0", sizeof(tmp));
2120         if (stat(tmp, &sb) < 0) {
2121                 /*
2122                  * A plain '.0' file does not exist.  Try again, first
2123                  * with the added suffix of '.gz', then with an added
2124                  * suffix of '.bz2' instead of '.gz'.
2125                  */
2126                 endp = strchr(tmp, '\0');
2127                 strlcat(tmp, COMPRESS_POSTFIX, sizeof(tmp));
2128                 if (stat(tmp, &sb) < 0) {
2129                         *endp = '\0';           /* Remove .gz */
2130                         strlcat(tmp, BZCOMPRESS_POSTFIX, sizeof(tmp));
2131                         if (stat(tmp, &sb) < 0)
2132                                 return (-1);
2133                 }
2134         }
2135         return ((int)(ptimeget_secs(timenow) - sb.st_mtime + 1800) / 3600);
2136 }
2137
2138 /* Skip Over Blanks */
2139 static char *
2140 sob(char *p)
2141 {
2142         while (p && *p && isspace(*p))
2143                 p++;
2144         return (p);
2145 }
2146
2147 /* Skip Over Non-Blanks */
2148 static char *
2149 son(char *p)
2150 {
2151         while (p && *p && !isspace(*p))
2152                 p++;
2153         return (p);
2154 }
2155
2156 /* Check if string is actually a number */
2157 static int
2158 isnumberstr(const char *string)
2159 {
2160         while (*string) {
2161                 if (!isdigitch(*string++))
2162                         return (0);
2163         }
2164         return (1);
2165 }
2166
2167 /*
2168  * Save the active log file under a new name.  A link to the new name
2169  * is the quick-and-easy way to do this.  If that fails (which it will
2170  * if the destination is on another partition), then make a copy of
2171  * the file to the new location.
2172  */
2173 static void
2174 savelog(char *from, char *to)
2175 {
2176         FILE *src, *dst;
2177         int c, res;
2178
2179         res = link(from, to);
2180         if (res == 0)
2181                 return;
2182
2183         if ((src = fopen(from, "r")) == NULL)
2184                 err(1, "can't fopen %s for reading", from);
2185         if ((dst = fopen(to, "w")) == NULL)
2186                 err(1, "can't fopen %s for writing", to);
2187
2188         while ((c = getc(src)) != EOF) {
2189                 if ((putc(c, dst)) == EOF)
2190                         err(1, "error writing to %s", to);
2191         }
2192
2193         if (ferror(src))
2194                 err(1, "error reading from %s", from);
2195         if ((fclose(src)) != 0)
2196                 err(1, "can't fclose %s", to);
2197         if ((fclose(dst)) != 0)
2198                 err(1, "can't fclose %s", from);
2199 }
2200
2201 /* create one or more directory components of a path */
2202 static void
2203 createdir(const struct conf_entry *ent, char *dirpart)
2204 {
2205         int res;
2206         char *s, *d;
2207         char mkdirpath[MAXPATHLEN];
2208         struct stat st;
2209
2210         s = dirpart;
2211         d = mkdirpath;
2212
2213         for (;;) {
2214                 *d++ = *s++;
2215                 if (*s != '/' && *s != '\0')
2216                         continue;
2217                 *d = '\0';
2218                 res = lstat(mkdirpath, &st);
2219                 if (res != 0) {
2220                         if (noaction) {
2221                                 printf("\tmkdir %s\n", mkdirpath);
2222                         } else {
2223                                 res = mkdir(mkdirpath, 0755);
2224                                 if (res != 0)
2225                                         err(1, "Error on mkdir(\"%s\") for -a",
2226                                             mkdirpath);
2227                         }
2228                 }
2229                 if (*s == '\0')
2230                         break;
2231         }
2232         if (verbose) {
2233                 if (ent->firstcreate)
2234                         printf("Created directory '%s' for new %s\n",
2235                             dirpart, ent->log);
2236                 else
2237                         printf("Created directory '%s' for -a\n", dirpart);
2238         }
2239 }
2240
2241 /*
2242  * Create a new log file, destroying any currently-existing version
2243  * of the log file in the process.  If the caller wants a backup copy
2244  * of the file to exist, they should call 'link(logfile,logbackup)'
2245  * before calling this routine.
2246  */
2247 void
2248 createlog(const struct conf_entry *ent)
2249 {
2250         int fd, failed;
2251         struct stat st;
2252         char *realfile, *slash, tempfile[MAXPATHLEN];
2253
2254         fd = -1;
2255         realfile = ent->log;
2256
2257         /*
2258          * If this log file is being created for the first time (-C option),
2259          * then it may also be true that the parent directory does not exist
2260          * yet.  Check, and create that directory if it is missing.
2261          */
2262         if (ent->firstcreate) {
2263                 strlcpy(tempfile, realfile, sizeof(tempfile));
2264                 slash = strrchr(tempfile, '/');
2265                 if (slash != NULL) {
2266                         *slash = '\0';
2267                         failed = stat(tempfile, &st);
2268                         if (failed && errno != ENOENT)
2269                                 err(1, "Error on stat(%s)", tempfile);
2270                         if (failed)
2271                                 createdir(ent, tempfile);
2272                         else if (!S_ISDIR(st.st_mode))
2273                                 errx(1, "%s exists but is not a directory",
2274                                     tempfile);
2275                 }
2276         }
2277
2278         /*
2279          * First create an unused filename, so it can be chown'ed and
2280          * chmod'ed before it is moved into the real location.  mkstemp
2281          * will create the file mode=600 & owned by us.  Note that all
2282          * temp files will have a suffix of '.z<something>'.
2283          */
2284         strlcpy(tempfile, realfile, sizeof(tempfile));
2285         strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2286         if (noaction)
2287                 printf("\tmktemp %s\n", tempfile);
2288         else {
2289                 fd = mkstemp(tempfile);
2290                 if (fd < 0)
2291                         err(1, "can't mkstemp logfile %s", tempfile);
2292
2293                 /*
2294                  * Add status message to what will become the new log file.
2295                  */
2296                 if (!(ent->flags & CE_BINARY)) {
2297                         if (log_trim(tempfile, ent))
2298                                 err(1, "can't add status message to log");
2299                 }
2300         }
2301
2302         /* Change the owner/group, if we are supposed to */
2303         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2304                 if (noaction)
2305                         printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2306                             tempfile);
2307                 else {
2308                         failed = fchown(fd, ent->uid, ent->gid);
2309                         if (failed)
2310                                 err(1, "can't fchown temp file %s", tempfile);
2311                 }
2312         }
2313
2314         /* Turn on NODUMP if it was requested in the config-file. */
2315         if (ent->flags & CE_NODUMP) {
2316                 if (noaction)
2317                         printf("\tchflags nodump %s\n", tempfile);
2318                 else {
2319                         failed = fchflags(fd, UF_NODUMP);
2320                         if (failed) {
2321                                 warn("log_trim: fchflags(NODUMP)");
2322                         }
2323                 }
2324         }
2325
2326         /*
2327          * Note that if the real logfile still exists, and if the call
2328          * to rename() fails, then "neither the old file nor the new
2329          * file shall be changed or created" (to quote the standard).
2330          * If the call succeeds, then the file will be replaced without
2331          * any window where some other process might find that the file
2332          * did not exist.
2333          * XXX - ? It may be that for some error conditions, we could
2334          *      retry by first removing the realfile and then renaming.
2335          */
2336         if (noaction) {
2337                 printf("\tchmod %o %s\n", ent->permissions, tempfile);
2338                 printf("\tmv %s %s\n", tempfile, realfile);
2339         } else {
2340                 failed = fchmod(fd, ent->permissions);
2341                 if (failed)
2342                         err(1, "can't fchmod temp file '%s'", tempfile);
2343                 failed = rename(tempfile, realfile);
2344                 if (failed)
2345                         err(1, "can't mv %s to %s", tempfile, realfile);
2346         }
2347
2348         if (fd >= 0)
2349                 close(fd);
2350 }
2351
2352 static void
2353 change_attrs(const char *fname, const struct conf_entry *ent)
2354 {
2355         int failed;
2356
2357         if (noaction) {
2358                 printf("\tchmod %o %s\n", ent->permissions, fname);
2359
2360                 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2361                         printf("\tchown %u:%u %s\n",
2362                             ent->uid, ent->gid, fname);
2363
2364                 if (ent->flags & CE_NODUMP)
2365                         printf("\tchflags nodump %s\n", fname);
2366                 return;
2367         }
2368
2369         failed = chmod(fname, ent->permissions);
2370         if (failed)
2371                 warn("can't chmod %s", fname);
2372
2373         if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2374                 failed = chown(fname, ent->uid, ent->gid);
2375                 if (failed)
2376                         warn("can't chown %s", fname);
2377         }
2378
2379         if (ent->flags & CE_NODUMP) {
2380                 failed = chflags(fname, UF_NODUMP);
2381                 if (failed)
2382                         warn("can't chflags %s NODUMP", fname);
2383         }
2384 }