newsyslog.c revision 301926
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: stable/10/usr.sbin/newsyslog/newsyslog.c 301926 2016-06-15 14:11:49Z vangyzen $"); 58 59#define OSF 60 61#include <sys/param.h> 62#include <sys/queue.h> 63#include <sys/stat.h> 64#include <sys/wait.h> 65 66#include <assert.h> 67#include <ctype.h> 68#include <err.h> 69#include <errno.h> 70#include <dirent.h> 71#include <fcntl.h> 72#include <fnmatch.h> 73#include <glob.h> 74#include <grp.h> 75#include <paths.h> 76#include <pwd.h> 77#include <signal.h> 78#include <stdio.h> 79#include <libgen.h> 80#include <stdlib.h> 81#include <string.h> 82#include <time.h> 83#include <unistd.h> 84 85#include "pathnames.h" 86#include "extern.h" 87 88/* 89 * Compression suffixes 90 */ 91#ifndef COMPRESS_SUFFIX_GZ 92#define COMPRESS_SUFFIX_GZ ".gz" 93#endif 94 95#ifndef COMPRESS_SUFFIX_BZ2 96#define COMPRESS_SUFFIX_BZ2 ".bz2" 97#endif 98 99#ifndef COMPRESS_SUFFIX_XZ 100#define COMPRESS_SUFFIX_XZ ".xz" 101#endif 102 103#define COMPRESS_SUFFIX_MAXLEN MAX(MAX(sizeof(COMPRESS_SUFFIX_GZ),sizeof(COMPRESS_SUFFIX_BZ2)),sizeof(COMPRESS_SUFFIX_XZ)) 104 105/* 106 * Compression types 107 */ 108#define COMPRESS_TYPES 4 /* Number of supported compression types */ 109 110#define COMPRESS_NONE 0 111#define COMPRESS_GZIP 1 112#define COMPRESS_BZIP2 2 113#define COMPRESS_XZ 3 114 115/* 116 * Bit-values for the 'flags' parsed from a config-file entry. 117 */ 118#define CE_BINARY 0x0008 /* Logfile is in binary, do not add status */ 119 /* messages to logfile(s) when rotating. */ 120#define CE_NOSIGNAL 0x0010 /* There is no process to signal when */ 121 /* trimming this file. */ 122#define CE_TRIMAT 0x0020 /* trim file at a specific time. */ 123#define CE_GLOB 0x0040 /* name of the log is file name pattern. */ 124#define CE_SIGNALGROUP 0x0080 /* Signal a process-group instead of a single */ 125 /* process when trimming this file. */ 126#define CE_CREATE 0x0100 /* Create the log file if it does not exist. */ 127#define CE_NODUMP 0x0200 /* Set 'nodump' on newly created log file. */ 128#define CE_PID2CMD 0x0400 /* Replace PID file with a shell command.*/ 129 130#define MIN_PID 5 /* Don't touch pids lower than this */ 131#define MAX_PID 99999 /* was lower, see /usr/include/sys/proc.h */ 132 133#define kbytes(size) (((size) + 1023) >> 10) 134 135#define DEFAULT_MARKER "<default>" 136#define DEBUG_MARKER "<debug>" 137#define INCLUDE_MARKER "<include>" 138#define DEFAULT_TIMEFNAME_FMT "%Y%m%dT%H%M%S" 139 140#define MAX_OLDLOGS 65536 /* Default maximum number of old logfiles */ 141 142struct compress_types { 143 const char *flag; /* Flag in configuration file */ 144 const char *suffix; /* Compression suffix */ 145 const char *path; /* Path to compression program */ 146}; 147 148static const struct compress_types compress_type[COMPRESS_TYPES] = { 149 { "", "", "" }, /* no compression */ 150 { "Z", COMPRESS_SUFFIX_GZ, _PATH_GZIP }, /* gzip compression */ 151 { "J", COMPRESS_SUFFIX_BZ2, _PATH_BZIP2 }, /* bzip2 compression */ 152 { "X", COMPRESS_SUFFIX_XZ, _PATH_XZ } /* xz compression */ 153}; 154 155struct conf_entry { 156 STAILQ_ENTRY(conf_entry) cf_nextp; 157 char *log; /* Name of the log */ 158 char *pid_cmd_file; /* PID or command file */ 159 char *r_reason; /* The reason this file is being rotated */ 160 int firstcreate; /* Creating log for the first time (-C). */ 161 int rotate; /* Non-zero if this file should be rotated */ 162 int fsize; /* size found for the log file */ 163 uid_t uid; /* Owner of log */ 164 gid_t gid; /* Group of log */ 165 int numlogs; /* Number of logs to keep */ 166 int trsize; /* Size cutoff to trigger trimming the log */ 167 int hours; /* Hours between log trimming */ 168 struct ptime_data *trim_at; /* Specific time to do trimming */ 169 unsigned int permissions; /* File permissions on the log */ 170 int flags; /* CE_BINARY */ 171 int compress; /* Compression */ 172 int sig; /* Signal to send */ 173 int def_cfg; /* Using the <default> rule for this file */ 174}; 175 176struct sigwork_entry { 177 SLIST_ENTRY(sigwork_entry) sw_nextp; 178 int sw_signum; /* the signal to send */ 179 int sw_pidok; /* true if pid value is valid */ 180 pid_t sw_pid; /* the process id from the PID file */ 181 const char *sw_pidtype; /* "daemon" or "process group" */ 182 int sw_runcmd; /* run command or send PID to signal */ 183 char sw_fname[1]; /* file the PID was read from or shell cmd */ 184}; 185 186struct zipwork_entry { 187 SLIST_ENTRY(zipwork_entry) zw_nextp; 188 const struct conf_entry *zw_conf; /* for chown/perm/flag info */ 189 const struct sigwork_entry *zw_swork; /* to know success of signal */ 190 int zw_fsize; /* size of the file to compress */ 191 char zw_fname[1]; /* the file to compress */ 192}; 193 194struct include_entry { 195 STAILQ_ENTRY(include_entry) inc_nextp; 196 const char *file; /* Name of file to process */ 197}; 198 199struct oldlog_entry { 200 char *fname; /* Filename of the log file */ 201 time_t t; /* Parsed timestamp of the logfile */ 202}; 203 204typedef enum { 205 FREE_ENT, KEEP_ENT 206} fk_entry; 207 208STAILQ_HEAD(cflist, conf_entry); 209static SLIST_HEAD(swlisthead, sigwork_entry) swhead = 210 SLIST_HEAD_INITIALIZER(swhead); 211static SLIST_HEAD(zwlisthead, zipwork_entry) zwhead = 212 SLIST_HEAD_INITIALIZER(zwhead); 213STAILQ_HEAD(ilist, include_entry); 214 215int dbg_at_times; /* -D Show details of 'trim_at' code */ 216 217static int archtodir = 0; /* Archive old logfiles to other directory */ 218static int createlogs; /* Create (non-GLOB) logfiles which do not */ 219 /* already exist. 1=='for entries with */ 220 /* C flag', 2=='for all entries'. */ 221int verbose = 0; /* Print out what's going on */ 222static int needroot = 1; /* Root privs are necessary */ 223int noaction = 0; /* Don't do anything, just show it */ 224static int norotate = 0; /* Don't rotate */ 225static int nosignal; /* Do not send any signals */ 226static int enforcepid = 0; /* If PID file does not exist or empty, do nothing */ 227static int force = 0; /* Force the trim no matter what */ 228static int rotatereq = 0; /* -R = Always rotate the file(s) as given */ 229 /* on the command (this also requires */ 230 /* that a list of files *are* given on */ 231 /* the run command). */ 232static char *requestor; /* The name given on a -R request */ 233static char *timefnamefmt = NULL;/* Use time based filenames instead of .0 */ 234static char *archdirname; /* Directory path to old logfiles archive */ 235static char *destdir = NULL; /* Directory to treat at root for logs */ 236static const char *conf; /* Configuration file to use */ 237 238struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */ 239static struct ptime_data *timenow; /* The time to use for checking at-fields */ 240 241#define DAYTIME_LEN 16 242static char daytime[DAYTIME_LEN];/* The current time in human readable form, 243 * used for rotation-tracking messages. */ 244static char hostname[MAXHOSTNAMELEN]; /* hostname */ 245 246static const char *path_syslogpid = _PATH_SYSLOGPID; 247 248static struct cflist *get_worklist(char **files); 249static void parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p, 250 struct conf_entry *defconf_p, struct ilist *inclist); 251static void add_to_queue(const char *fname, struct ilist *inclist); 252static char *sob(char *p); 253static char *son(char *p); 254static int isnumberstr(const char *); 255static int isglobstr(const char *); 256static char *missing_field(char *p, char *errline); 257static void change_attrs(const char *, const struct conf_entry *); 258static const char *get_logfile_suffix(const char *logfile); 259static fk_entry do_entry(struct conf_entry *); 260static fk_entry do_rotate(const struct conf_entry *); 261static void do_sigwork(struct sigwork_entry *); 262static void do_zipwork(struct zipwork_entry *); 263static struct sigwork_entry * 264 save_sigwork(const struct conf_entry *); 265static struct zipwork_entry * 266 save_zipwork(const struct conf_entry *, const struct 267 sigwork_entry *, int, const char *); 268static void set_swpid(struct sigwork_entry *, const struct conf_entry *); 269static int sizefile(const char *); 270static void expand_globs(struct cflist *work_p, struct cflist *glob_p); 271static void free_clist(struct cflist *list); 272static void free_entry(struct conf_entry *ent); 273static struct conf_entry *init_entry(const char *fname, 274 struct conf_entry *src_entry); 275static void parse_args(int argc, char **argv); 276static int parse_doption(const char *doption); 277static void usage(void); 278static int log_trim(const char *logname, const struct conf_entry *log_ent); 279static int age_old_log(const char *file); 280static void savelog(char *from, char *to); 281static void createdir(const struct conf_entry *ent, char *dirpart); 282static void createlog(const struct conf_entry *ent); 283static int parse_signal(const char *str); 284 285/* 286 * All the following take a parameter of 'int', but expect values in the 287 * range of unsigned char. Define wrappers which take values of type 'char', 288 * whether signed or unsigned, and ensure they end up in the right range. 289 */ 290#define isdigitch(Anychar) isdigit((u_char)(Anychar)) 291#define isprintch(Anychar) isprint((u_char)(Anychar)) 292#define isspacech(Anychar) isspace((u_char)(Anychar)) 293#define tolowerch(Anychar) tolower((u_char)(Anychar)) 294 295int 296main(int argc, char **argv) 297{ 298 struct cflist *worklist; 299 struct conf_entry *p; 300 struct sigwork_entry *stmp; 301 struct zipwork_entry *ztmp; 302 303 SLIST_INIT(&swhead); 304 SLIST_INIT(&zwhead); 305 306 parse_args(argc, argv); 307 argc -= optind; 308 argv += optind; 309 310 if (needroot && getuid() && geteuid()) 311 errx(1, "must have root privs"); 312 worklist = get_worklist(argv); 313 314 /* 315 * Rotate all the files which need to be rotated. Note that 316 * some users have *hundreds* of entries in newsyslog.conf! 317 */ 318 while (!STAILQ_EMPTY(worklist)) { 319 p = STAILQ_FIRST(worklist); 320 STAILQ_REMOVE_HEAD(worklist, cf_nextp); 321 if (do_entry(p) == FREE_ENT) 322 free_entry(p); 323 } 324 325 /* 326 * Send signals to any processes which need a signal to tell 327 * them to close and re-open the log file(s) we have rotated. 328 * Note that zipwork_entries include pointers to these 329 * sigwork_entry's, so we can not free the entries here. 330 */ 331 if (!SLIST_EMPTY(&swhead)) { 332 if (noaction || verbose) 333 printf("Signal all daemon process(es)...\n"); 334 SLIST_FOREACH(stmp, &swhead, sw_nextp) 335 do_sigwork(stmp); 336 if (!(rotatereq && nosignal)) { 337 if (noaction) 338 printf("\tsleep 10\n"); 339 else { 340 if (verbose) 341 printf("Pause 10 seconds to allow " 342 "daemon(s) to close log file(s)\n"); 343 sleep(10); 344 } 345 } 346 } 347 /* 348 * Compress all files that we're expected to compress, now 349 * that all processes should have closed the files which 350 * have been rotated. 351 */ 352 if (!SLIST_EMPTY(&zwhead)) { 353 if (noaction || verbose) 354 printf("Compress all rotated log file(s)...\n"); 355 while (!SLIST_EMPTY(&zwhead)) { 356 ztmp = SLIST_FIRST(&zwhead); 357 do_zipwork(ztmp); 358 SLIST_REMOVE_HEAD(&zwhead, zw_nextp); 359 free(ztmp); 360 } 361 } 362 /* Now free all the sigwork entries. */ 363 while (!SLIST_EMPTY(&swhead)) { 364 stmp = SLIST_FIRST(&swhead); 365 SLIST_REMOVE_HEAD(&swhead, sw_nextp); 366 free(stmp); 367 } 368 369 while (wait(NULL) > 0 || errno == EINTR) 370 ; 371 return (0); 372} 373 374static struct conf_entry * 375init_entry(const char *fname, struct conf_entry *src_entry) 376{ 377 struct conf_entry *tempwork; 378 379 if (verbose > 4) 380 printf("\t--> [creating entry for %s]\n", fname); 381 382 tempwork = malloc(sizeof(struct conf_entry)); 383 if (tempwork == NULL) 384 err(1, "malloc of conf_entry for %s", fname); 385 386 if (destdir == NULL || fname[0] != '/') 387 tempwork->log = strdup(fname); 388 else 389 asprintf(&tempwork->log, "%s%s", destdir, fname); 390 if (tempwork->log == NULL) 391 err(1, "strdup for %s", fname); 392 393 if (src_entry != NULL) { 394 tempwork->pid_cmd_file = NULL; 395 if (src_entry->pid_cmd_file) 396 tempwork->pid_cmd_file = strdup(src_entry->pid_cmd_file); 397 tempwork->r_reason = NULL; 398 tempwork->firstcreate = 0; 399 tempwork->rotate = 0; 400 tempwork->fsize = -1; 401 tempwork->uid = src_entry->uid; 402 tempwork->gid = src_entry->gid; 403 tempwork->numlogs = src_entry->numlogs; 404 tempwork->trsize = src_entry->trsize; 405 tempwork->hours = src_entry->hours; 406 tempwork->trim_at = NULL; 407 if (src_entry->trim_at != NULL) 408 tempwork->trim_at = ptime_init(src_entry->trim_at); 409 tempwork->permissions = src_entry->permissions; 410 tempwork->flags = src_entry->flags; 411 tempwork->compress = src_entry->compress; 412 tempwork->sig = src_entry->sig; 413 tempwork->def_cfg = src_entry->def_cfg; 414 } else { 415 /* Initialize as a "do-nothing" entry */ 416 tempwork->pid_cmd_file = NULL; 417 tempwork->r_reason = NULL; 418 tempwork->firstcreate = 0; 419 tempwork->rotate = 0; 420 tempwork->fsize = -1; 421 tempwork->uid = (uid_t)-1; 422 tempwork->gid = (gid_t)-1; 423 tempwork->numlogs = 1; 424 tempwork->trsize = -1; 425 tempwork->hours = -1; 426 tempwork->trim_at = NULL; 427 tempwork->permissions = 0; 428 tempwork->flags = 0; 429 tempwork->compress = COMPRESS_NONE; 430 tempwork->sig = SIGHUP; 431 tempwork->def_cfg = 0; 432 } 433 434 return (tempwork); 435} 436 437static void 438free_entry(struct conf_entry *ent) 439{ 440 441 if (ent == NULL) 442 return; 443 444 if (ent->log != NULL) { 445 if (verbose > 4) 446 printf("\t--> [freeing entry for %s]\n", ent->log); 447 free(ent->log); 448 ent->log = NULL; 449 } 450 451 if (ent->pid_cmd_file != NULL) { 452 free(ent->pid_cmd_file); 453 ent->pid_cmd_file = NULL; 454 } 455 456 if (ent->r_reason != NULL) { 457 free(ent->r_reason); 458 ent->r_reason = NULL; 459 } 460 461 if (ent->trim_at != NULL) { 462 ptime_free(ent->trim_at); 463 ent->trim_at = NULL; 464 } 465 466 free(ent); 467} 468 469static void 470free_clist(struct cflist *list) 471{ 472 struct conf_entry *ent; 473 474 while (!STAILQ_EMPTY(list)) { 475 ent = STAILQ_FIRST(list); 476 STAILQ_REMOVE_HEAD(list, cf_nextp); 477 free_entry(ent); 478 } 479 480 free(list); 481 list = NULL; 482} 483 484static fk_entry 485do_entry(struct conf_entry * ent) 486{ 487#define REASON_MAX 80 488 int modtime; 489 fk_entry free_or_keep; 490 double diffsecs; 491 char temp_reason[REASON_MAX]; 492 int oversized; 493 494 free_or_keep = FREE_ENT; 495 if (verbose) 496 printf("%s <%d%s>: ", ent->log, ent->numlogs, 497 compress_type[ent->compress].flag); 498 ent->fsize = sizefile(ent->log); 499 oversized = ((ent->trsize > 0) && (ent->fsize >= ent->trsize)); 500 modtime = age_old_log(ent->log); 501 ent->rotate = 0; 502 ent->firstcreate = 0; 503 if (ent->fsize < 0) { 504 /* 505 * If either the C flag or the -C option was specified, 506 * and if we won't be creating the file, then have the 507 * verbose message include a hint as to why the file 508 * will not be created. 509 */ 510 temp_reason[0] = '\0'; 511 if (createlogs > 1) 512 ent->firstcreate = 1; 513 else if ((ent->flags & CE_CREATE) && createlogs) 514 ent->firstcreate = 1; 515 else if (ent->flags & CE_CREATE) 516 strlcpy(temp_reason, " (no -C option)", REASON_MAX); 517 else if (createlogs) 518 strlcpy(temp_reason, " (no C flag)", REASON_MAX); 519 520 if (ent->firstcreate) { 521 if (verbose) 522 printf("does not exist -> will create.\n"); 523 createlog(ent); 524 } else if (verbose) { 525 printf("does not exist, skipped%s.\n", temp_reason); 526 } 527 } else { 528 if (ent->flags & CE_TRIMAT && !force && !rotatereq && 529 !oversized) { 530 diffsecs = ptimeget_diff(timenow, ent->trim_at); 531 if (diffsecs < 0.0) { 532 /* trim_at is some time in the future. */ 533 if (verbose) { 534 ptime_adjust4dst(ent->trim_at, 535 timenow); 536 printf("--> will trim at %s", 537 ptimeget_ctime(ent->trim_at)); 538 } 539 return (free_or_keep); 540 } else if (diffsecs >= 3600.0) { 541 /* 542 * trim_at is more than an hour in the past, 543 * so find the next valid trim_at time, and 544 * tell the user what that will be. 545 */ 546 if (verbose && dbg_at_times) 547 printf("\n\t--> prev trim at %s\t", 548 ptimeget_ctime(ent->trim_at)); 549 if (verbose) { 550 ptimeset_nxtime(ent->trim_at); 551 printf("--> will trim at %s", 552 ptimeget_ctime(ent->trim_at)); 553 } 554 return (free_or_keep); 555 } else if (verbose && noaction && dbg_at_times) { 556 /* 557 * If we are just debugging at-times, then 558 * a detailed message is helpful. Also 559 * skip "doing" any commands, since they 560 * would all be turned off by no-action. 561 */ 562 printf("\n\t--> timematch at %s", 563 ptimeget_ctime(ent->trim_at)); 564 return (free_or_keep); 565 } else if (verbose && ent->hours <= 0) { 566 printf("--> time is up\n"); 567 } 568 } 569 if (verbose && (ent->trsize > 0)) 570 printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize); 571 if (verbose && (ent->hours > 0)) 572 printf(" age (hr): %d [%d] ", modtime, ent->hours); 573 574 /* 575 * Figure out if this logfile needs to be rotated. 576 */ 577 temp_reason[0] = '\0'; 578 if (rotatereq) { 579 ent->rotate = 1; 580 snprintf(temp_reason, REASON_MAX, " due to -R from %s", 581 requestor); 582 } else if (force) { 583 ent->rotate = 1; 584 snprintf(temp_reason, REASON_MAX, " due to -F request"); 585 } else if (oversized) { 586 ent->rotate = 1; 587 snprintf(temp_reason, REASON_MAX, " due to size>%dK", 588 ent->trsize); 589 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) { 590 ent->rotate = 1; 591 } else if ((ent->hours > 0) && ((modtime >= ent->hours) || 592 (modtime < 0))) { 593 ent->rotate = 1; 594 } 595 596 /* 597 * If the file needs to be rotated, then rotate it. 598 */ 599 if (ent->rotate && !norotate) { 600 if (temp_reason[0] != '\0') 601 ent->r_reason = strdup(temp_reason); 602 if (verbose) 603 printf("--> trimming log....\n"); 604 if (noaction && !verbose) 605 printf("%s <%d%s>: trimming\n", ent->log, 606 ent->numlogs, 607 compress_type[ent->compress].flag); 608 free_or_keep = do_rotate(ent); 609 } else { 610 if (verbose) 611 printf("--> skipping\n"); 612 } 613 } 614 return (free_or_keep); 615#undef REASON_MAX 616} 617 618static void 619parse_args(int argc, char **argv) 620{ 621 int ch; 622 char *p; 623 624 timenow = ptime_init(NULL); 625 ptimeset_time(timenow, time(NULL)); 626 strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN); 627 628 /* Let's get our hostname */ 629 (void)gethostname(hostname, sizeof(hostname)); 630 631 /* Truncate domain */ 632 if ((p = strchr(hostname, '.')) != NULL) 633 *p = '\0'; 634 635 /* Parse command line options. */ 636 while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1) 637 switch (ch) { 638 case 'a': 639 archtodir++; 640 archdirname = optarg; 641 break; 642 case 'd': 643 destdir = optarg; 644 break; 645 case 'f': 646 conf = optarg; 647 break; 648 case 'n': 649 noaction++; 650 /* FALLTHROUGH */ 651 case 'r': 652 needroot = 0; 653 break; 654 case 's': 655 nosignal = 1; 656 break; 657 case 't': 658 if (optarg[0] == '\0' || 659 strcmp(optarg, "DEFAULT") == 0) 660 timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT); 661 else 662 timefnamefmt = strdup(optarg); 663 break; 664 case 'v': 665 verbose++; 666 break; 667 case 'C': 668 /* Useful for things like rc.diskless... */ 669 createlogs++; 670 break; 671 case 'D': 672 /* 673 * Set some debugging option. The specific option 674 * depends on the value of optarg. These options 675 * may come and go without notice or documentation. 676 */ 677 if (parse_doption(optarg)) 678 break; 679 usage(); 680 /* NOTREACHED */ 681 case 'F': 682 force++; 683 break; 684 case 'N': 685 norotate++; 686 break; 687 case 'P': 688 enforcepid++; 689 break; 690 case 'R': 691 rotatereq++; 692 requestor = strdup(optarg); 693 break; 694 case 'S': 695 path_syslogpid = optarg; 696 break; 697 case 'm': /* Used by OpenBSD for "monitor mode" */ 698 default: 699 usage(); 700 /* NOTREACHED */ 701 } 702 703 if (force && norotate) { 704 warnx("Only one of -F and -N may be specified."); 705 usage(); 706 /* NOTREACHED */ 707 } 708 709 if (rotatereq) { 710 if (optind == argc) { 711 warnx("At least one filename must be given when -R is specified."); 712 usage(); 713 /* NOTREACHED */ 714 } 715 /* Make sure "requestor" value is safe for a syslog message. */ 716 for (p = requestor; *p != '\0'; p++) { 717 if (!isprintch(*p) && (*p != '\t')) 718 *p = '.'; 719 } 720 } 721 722 if (dbg_timenow) { 723 /* 724 * Note that the 'daytime' variable is not changed. 725 * That is only used in messages that track when a 726 * logfile is rotated, and if a file *is* rotated, 727 * then it will still rotated at the "real now" time. 728 */ 729 ptime_free(timenow); 730 timenow = dbg_timenow; 731 fprintf(stderr, "Debug: Running as if TimeNow is %s", 732 ptimeget_ctime(dbg_timenow)); 733 } 734 735} 736 737/* 738 * These debugging options are mainly meant for developer use, such 739 * as writing regression-tests. They would not be needed by users 740 * during normal operation of newsyslog... 741 */ 742static int 743parse_doption(const char *doption) 744{ 745 const char TN[] = "TN="; 746 int res; 747 748 if (strncmp(doption, TN, sizeof(TN) - 1) == 0) { 749 /* 750 * The "TimeNow" debugging option. This might be off 751 * by an hour when crossing a timezone change. 752 */ 753 dbg_timenow = ptime_init(NULL); 754 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601, 755 time(NULL), doption + sizeof(TN) - 1); 756 if (res == -2) { 757 warnx("Non-existent time specified on -D %s", doption); 758 return (0); /* failure */ 759 } else if (res < 0) { 760 warnx("Malformed time given on -D %s", doption); 761 return (0); /* failure */ 762 } 763 return (1); /* successfully parsed */ 764 765 } 766 767 if (strcmp(doption, "ats") == 0) { 768 dbg_at_times++; 769 return (1); /* successfully parsed */ 770 } 771 772 /* XXX - This check could probably be dropped. */ 773 if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder") 774 == 0)) { 775 warnx("NOTE: newsyslog always uses 'neworder'."); 776 return (1); /* successfully parsed */ 777 } 778 779 warnx("Unknown -D (debug) option: '%s'", doption); 780 return (0); /* failure */ 781} 782 783static void 784usage(void) 785{ 786 787 fprintf(stderr, 788 "usage: newsyslog [-CFNPnrsv] [-a directory] [-d directory] [-f config_file]\n" 789 " [-S pidfile] [-t timefmt] [[-R tagname] file ...]\n"); 790 exit(1); 791} 792 793/* 794 * Parse a configuration file and return a linked list of all the logs 795 * which should be processed. 796 */ 797static struct cflist * 798get_worklist(char **files) 799{ 800 FILE *f; 801 char **given; 802 struct cflist *cmdlist, *filelist, *globlist; 803 struct conf_entry *defconf, *dupent, *ent; 804 struct ilist inclist; 805 struct include_entry *inc; 806 int gmatch, fnres; 807 808 defconf = NULL; 809 STAILQ_INIT(&inclist); 810 811 filelist = malloc(sizeof(struct cflist)); 812 if (filelist == NULL) 813 err(1, "malloc of filelist"); 814 STAILQ_INIT(filelist); 815 globlist = malloc(sizeof(struct cflist)); 816 if (globlist == NULL) 817 err(1, "malloc of globlist"); 818 STAILQ_INIT(globlist); 819 820 inc = malloc(sizeof(struct include_entry)); 821 if (inc == NULL) 822 err(1, "malloc of inc"); 823 inc->file = conf; 824 if (inc->file == NULL) 825 inc->file = _PATH_CONF; 826 STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp); 827 828 STAILQ_FOREACH(inc, &inclist, inc_nextp) { 829 if (strcmp(inc->file, "-") != 0) 830 f = fopen(inc->file, "r"); 831 else { 832 f = stdin; 833 inc->file = "<stdin>"; 834 } 835 if (!f) 836 err(1, "%s", inc->file); 837 838 if (verbose) 839 printf("Processing %s\n", inc->file); 840 parse_file(f, filelist, globlist, defconf, &inclist); 841 (void) fclose(f); 842 } 843 844 /* 845 * All config-file information has been read in and turned into 846 * a filelist and a globlist. If there were no specific files 847 * given on the run command, then the only thing left to do is to 848 * call a routine which finds all files matched by the globlist 849 * and adds them to the filelist. Then return the worklist. 850 */ 851 if (*files == NULL) { 852 expand_globs(filelist, globlist); 853 free_clist(globlist); 854 if (defconf != NULL) 855 free_entry(defconf); 856 return (filelist); 857 /* NOTREACHED */ 858 } 859 860 /* 861 * If newsyslog was given a specific list of files to process, 862 * it may be that some of those files were not listed in any 863 * config file. Those unlisted files should get the default 864 * rotation action. First, create the default-rotation action 865 * if none was found in a system config file. 866 */ 867 if (defconf == NULL) { 868 defconf = init_entry(DEFAULT_MARKER, NULL); 869 defconf->numlogs = 3; 870 defconf->trsize = 50; 871 defconf->permissions = S_IRUSR|S_IWUSR; 872 } 873 874 /* 875 * If newsyslog was run with a list of specific filenames, 876 * then create a new worklist which has only those files in 877 * it, picking up the rotation-rules for those files from 878 * the original filelist. 879 * 880 * XXX - Note that this will copy multiple rules for a single 881 * logfile, if multiple entries are an exact match for 882 * that file. That matches the historic behavior, but do 883 * we want to continue to allow it? If so, it should 884 * probably be handled more intelligently. 885 */ 886 cmdlist = malloc(sizeof(struct cflist)); 887 if (cmdlist == NULL) 888 err(1, "malloc of cmdlist"); 889 STAILQ_INIT(cmdlist); 890 891 for (given = files; *given; ++given) { 892 /* 893 * First try to find exact-matches for this given file. 894 */ 895 gmatch = 0; 896 STAILQ_FOREACH(ent, filelist, cf_nextp) { 897 if (strcmp(ent->log, *given) == 0) { 898 gmatch++; 899 dupent = init_entry(*given, ent); 900 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp); 901 } 902 } 903 if (gmatch) { 904 if (verbose > 2) 905 printf("\t+ Matched entry %s\n", *given); 906 continue; 907 } 908 909 /* 910 * There was no exact-match for this given file, so look 911 * for a "glob" entry which does match. 912 */ 913 gmatch = 0; 914 if (verbose > 2 && globlist != NULL) 915 printf("\t+ Checking globs for %s\n", *given); 916 STAILQ_FOREACH(ent, globlist, cf_nextp) { 917 fnres = fnmatch(ent->log, *given, FNM_PATHNAME); 918 if (verbose > 2) 919 printf("\t+ = %d for pattern %s\n", fnres, 920 ent->log); 921 if (fnres == 0) { 922 gmatch++; 923 dupent = init_entry(*given, ent); 924 /* This new entry is not a glob! */ 925 dupent->flags &= ~CE_GLOB; 926 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp); 927 /* Only allow a match to one glob-entry */ 928 break; 929 } 930 } 931 if (gmatch) { 932 if (verbose > 2) 933 printf("\t+ Matched %s via %s\n", *given, 934 ent->log); 935 continue; 936 } 937 938 /* 939 * This given file was not found in any config file, so 940 * add a worklist item based on the default entry. 941 */ 942 if (verbose > 2) 943 printf("\t+ No entry matched %s (will use %s)\n", 944 *given, DEFAULT_MARKER); 945 dupent = init_entry(*given, defconf); 946 /* Mark that it was *not* found in a config file */ 947 dupent->def_cfg = 1; 948 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp); 949 } 950 951 /* 952 * Free all the entries in the original work list, the list of 953 * glob entries, and the default entry. 954 */ 955 free_clist(filelist); 956 free_clist(globlist); 957 free_entry(defconf); 958 959 /* And finally, return a worklist which matches the given files. */ 960 return (cmdlist); 961} 962 963/* 964 * Expand the list of entries with filename patterns, and add all files 965 * which match those glob-entries onto the worklist. 966 */ 967static void 968expand_globs(struct cflist *work_p, struct cflist *glob_p) 969{ 970 int gmatch, gres; 971 size_t i; 972 char *mfname; 973 struct conf_entry *dupent, *ent, *globent; 974 glob_t pglob; 975 struct stat st_fm; 976 977 /* 978 * The worklist contains all fully-specified (non-GLOB) names. 979 * 980 * Now expand the list of filename-pattern (GLOB) entries into 981 * a second list, which (by definition) will only match files 982 * that already exist. Do not add a glob-related entry for any 983 * file which already exists in the fully-specified list. 984 */ 985 STAILQ_FOREACH(globent, glob_p, cf_nextp) { 986 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob); 987 if (gres != 0) { 988 warn("cannot expand pattern (%d): %s", gres, 989 globent->log); 990 continue; 991 } 992 993 if (verbose > 2) 994 printf("\t+ Expanding pattern %s\n", globent->log); 995 for (i = 0; i < pglob.gl_matchc; i++) { 996 mfname = pglob.gl_pathv[i]; 997 998 /* See if this file already has a specific entry. */ 999 gmatch = 0; 1000 STAILQ_FOREACH(ent, work_p, cf_nextp) { 1001 if (strcmp(mfname, ent->log) == 0) { 1002 gmatch++; 1003 break; 1004 } 1005 } 1006 if (gmatch) 1007 continue; 1008 1009 /* Make sure the named matched is a file. */ 1010 gres = lstat(mfname, &st_fm); 1011 if (gres != 0) { 1012 /* Error on a file that glob() matched?!? */ 1013 warn("Skipping %s - lstat() error", mfname); 1014 continue; 1015 } 1016 if (!S_ISREG(st_fm.st_mode)) { 1017 /* We only rotate files! */ 1018 if (verbose > 2) 1019 printf("\t+ . skipping %s (!file)\n", 1020 mfname); 1021 continue; 1022 } 1023 1024 if (verbose > 2) 1025 printf("\t+ . add file %s\n", mfname); 1026 dupent = init_entry(mfname, globent); 1027 /* This new entry is not a glob! */ 1028 dupent->flags &= ~CE_GLOB; 1029 1030 /* Add to the worklist. */ 1031 STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp); 1032 } 1033 globfree(&pglob); 1034 if (verbose > 2) 1035 printf("\t+ Done with pattern %s\n", globent->log); 1036 } 1037} 1038 1039/* 1040 * Parse a configuration file and update a linked list of all the logs to 1041 * process. 1042 */ 1043static void 1044parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p, 1045 struct conf_entry *defconf_p, struct ilist *inclist) 1046{ 1047 char line[BUFSIZ], *parse, *q; 1048 char *cp, *errline, *group; 1049 struct conf_entry *working; 1050 struct passwd *pwd; 1051 struct group *grp; 1052 glob_t pglob; 1053 int eol, ptm_opts, res, special; 1054 size_t i; 1055 1056 errline = NULL; 1057 while (fgets(line, BUFSIZ, cf)) { 1058 if ((line[0] == '\n') || (line[0] == '#') || 1059 (strlen(line) == 0)) 1060 continue; 1061 if (errline != NULL) 1062 free(errline); 1063 errline = strdup(line); 1064 for (cp = line + 1; *cp != '\0'; cp++) { 1065 if (*cp != '#') 1066 continue; 1067 if (*(cp - 1) == '\\') { 1068 strcpy(cp - 1, cp); 1069 cp--; 1070 continue; 1071 } 1072 *cp = '\0'; 1073 break; 1074 } 1075 1076 q = parse = missing_field(sob(line), errline); 1077 parse = son(line); 1078 if (!*parse) 1079 errx(1, "malformed line (missing fields):\n%s", 1080 errline); 1081 *parse = '\0'; 1082 1083 /* 1084 * Allow people to set debug options via the config file. 1085 * (NOTE: debug options are undocumented, and may disappear 1086 * at any time, etc). 1087 */ 1088 if (strcasecmp(DEBUG_MARKER, q) == 0) { 1089 q = parse = missing_field(sob(parse + 1), errline); 1090 parse = son(parse); 1091 if (!*parse) 1092 warnx("debug line specifies no option:\n%s", 1093 errline); 1094 else { 1095 *parse = '\0'; 1096 parse_doption(q); 1097 } 1098 continue; 1099 } else if (strcasecmp(INCLUDE_MARKER, q) == 0) { 1100 if (verbose) 1101 printf("Found: %s", errline); 1102 q = parse = missing_field(sob(parse + 1), errline); 1103 parse = son(parse); 1104 if (!*parse) { 1105 warnx("include line missing argument:\n%s", 1106 errline); 1107 continue; 1108 } 1109 1110 *parse = '\0'; 1111 1112 if (isglobstr(q)) { 1113 res = glob(q, GLOB_NOCHECK, NULL, &pglob); 1114 if (res != 0) { 1115 warn("cannot expand pattern (%d): %s", 1116 res, q); 1117 continue; 1118 } 1119 1120 if (verbose > 2) 1121 printf("\t+ Expanding pattern %s\n", q); 1122 1123 for (i = 0; i < pglob.gl_matchc; i++) 1124 add_to_queue(pglob.gl_pathv[i], 1125 inclist); 1126 globfree(&pglob); 1127 } else 1128 add_to_queue(q, inclist); 1129 continue; 1130 } 1131 1132 special = 0; 1133 working = init_entry(q, NULL); 1134 if (strcasecmp(DEFAULT_MARKER, q) == 0) { 1135 special = 1; 1136 if (defconf_p != NULL) { 1137 warnx("Ignoring duplicate entry for %s!", q); 1138 free_entry(working); 1139 continue; 1140 } 1141 defconf_p = working; 1142 } 1143 1144 q = parse = missing_field(sob(parse + 1), errline); 1145 parse = son(parse); 1146 if (!*parse) 1147 errx(1, "malformed line (missing fields):\n%s", 1148 errline); 1149 *parse = '\0'; 1150 if ((group = strchr(q, ':')) != NULL || 1151 (group = strrchr(q, '.')) != NULL) { 1152 *group++ = '\0'; 1153 if (*q) { 1154 if (!(isnumberstr(q))) { 1155 if ((pwd = getpwnam(q)) == NULL) 1156 errx(1, 1157 "error in config file; unknown user:\n%s", 1158 errline); 1159 working->uid = pwd->pw_uid; 1160 } else 1161 working->uid = atoi(q); 1162 } else 1163 working->uid = (uid_t)-1; 1164 1165 q = group; 1166 if (*q) { 1167 if (!(isnumberstr(q))) { 1168 if ((grp = getgrnam(q)) == NULL) 1169 errx(1, 1170 "error in config file; unknown group:\n%s", 1171 errline); 1172 working->gid = grp->gr_gid; 1173 } else 1174 working->gid = atoi(q); 1175 } else 1176 working->gid = (gid_t)-1; 1177 1178 q = parse = missing_field(sob(parse + 1), errline); 1179 parse = son(parse); 1180 if (!*parse) 1181 errx(1, "malformed line (missing fields):\n%s", 1182 errline); 1183 *parse = '\0'; 1184 } else { 1185 working->uid = (uid_t)-1; 1186 working->gid = (gid_t)-1; 1187 } 1188 1189 if (!sscanf(q, "%o", &working->permissions)) 1190 errx(1, "error in config file; bad permissions:\n%s", 1191 errline); 1192 1193 q = parse = missing_field(sob(parse + 1), errline); 1194 parse = son(parse); 1195 if (!*parse) 1196 errx(1, "malformed line (missing fields):\n%s", 1197 errline); 1198 *parse = '\0'; 1199 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0) 1200 errx(1, "error in config file; bad value for count of logs to save:\n%s", 1201 errline); 1202 1203 q = parse = missing_field(sob(parse + 1), errline); 1204 parse = son(parse); 1205 if (!*parse) 1206 errx(1, "malformed line (missing fields):\n%s", 1207 errline); 1208 *parse = '\0'; 1209 if (isdigitch(*q)) 1210 working->trsize = atoi(q); 1211 else if (strcmp(q, "*") == 0) 1212 working->trsize = -1; 1213 else { 1214 warnx("Invalid value of '%s' for 'size' in line:\n%s", 1215 q, errline); 1216 working->trsize = -1; 1217 } 1218 1219 working->flags = 0; 1220 working->compress = COMPRESS_NONE; 1221 q = parse = missing_field(sob(parse + 1), errline); 1222 parse = son(parse); 1223 eol = !*parse; 1224 *parse = '\0'; 1225 { 1226 char *ep; 1227 u_long ul; 1228 1229 ul = strtoul(q, &ep, 10); 1230 if (ep == q) 1231 working->hours = 0; 1232 else if (*ep == '*') 1233 working->hours = -1; 1234 else if (ul > INT_MAX) 1235 errx(1, "interval is too large:\n%s", errline); 1236 else 1237 working->hours = ul; 1238 1239 if (*ep == '\0' || strcmp(ep, "*") == 0) 1240 goto no_trimat; 1241 if (*ep != '@' && *ep != '$') 1242 errx(1, "malformed interval/at:\n%s", errline); 1243 1244 working->flags |= CE_TRIMAT; 1245 working->trim_at = ptime_init(NULL); 1246 ptm_opts = PTM_PARSE_ISO8601; 1247 if (*ep == '$') 1248 ptm_opts = PTM_PARSE_DWM; 1249 ptm_opts |= PTM_PARSE_MATCHDOM; 1250 res = ptime_relparse(working->trim_at, ptm_opts, 1251 ptimeget_secs(timenow), ep + 1); 1252 if (res == -2) 1253 errx(1, "nonexistent time for 'at' value:\n%s", 1254 errline); 1255 else if (res < 0) 1256 errx(1, "malformed 'at' value:\n%s", errline); 1257 } 1258no_trimat: 1259 1260 if (eol) 1261 q = NULL; 1262 else { 1263 q = parse = sob(parse + 1); /* Optional field */ 1264 parse = son(parse); 1265 if (!*parse) 1266 eol = 1; 1267 *parse = '\0'; 1268 } 1269 1270 for (; q && *q && !isspacech(*q); q++) { 1271 switch (tolowerch(*q)) { 1272 case 'b': 1273 working->flags |= CE_BINARY; 1274 break; 1275 case 'c': 1276 /* 1277 * XXX - Ick! Ugly! Remove ASAP! 1278 * We want `c' and `C' for "create". But we 1279 * will temporarily treat `c' as `g', because 1280 * FreeBSD releases <= 4.8 have a typo of 1281 * checking ('G' || 'c') for CE_GLOB. 1282 */ 1283 if (*q == 'c') { 1284 warnx("Assuming 'g' for 'c' in flags for line:\n%s", 1285 errline); 1286 warnx("The 'c' flag will eventually mean 'CREATE'"); 1287 working->flags |= CE_GLOB; 1288 break; 1289 } 1290 working->flags |= CE_CREATE; 1291 break; 1292 case 'd': 1293 working->flags |= CE_NODUMP; 1294 break; 1295 case 'g': 1296 working->flags |= CE_GLOB; 1297 break; 1298 case 'j': 1299 working->compress = COMPRESS_BZIP2; 1300 break; 1301 case 'n': 1302 working->flags |= CE_NOSIGNAL; 1303 break; 1304 case 'r': 1305 working->flags |= CE_PID2CMD; 1306 break; 1307 case 'u': 1308 working->flags |= CE_SIGNALGROUP; 1309 break; 1310 case 'w': 1311 /* Depreciated flag - keep for compatibility purposes */ 1312 break; 1313 case 'x': 1314 working->compress = COMPRESS_XZ; 1315 break; 1316 case 'z': 1317 working->compress = COMPRESS_GZIP; 1318 break; 1319 case '-': 1320 break; 1321 case 'f': /* Used by OpenBSD for "CE_FOLLOW" */ 1322 case 'm': /* Used by OpenBSD for "CE_MONITOR" */ 1323 case 'p': /* Used by NetBSD for "CE_PLAIN0" */ 1324 default: 1325 errx(1, "illegal flag in config file -- %c", 1326 *q); 1327 } 1328 } 1329 1330 if (eol) 1331 q = NULL; 1332 else { 1333 q = parse = sob(parse + 1); /* Optional field */ 1334 parse = son(parse); 1335 if (!*parse) 1336 eol = 1; 1337 *parse = '\0'; 1338 } 1339 1340 working->pid_cmd_file = NULL; 1341 if (q && *q) { 1342 if (*q == '/') 1343 working->pid_cmd_file = strdup(q); 1344 else if (isalnum(*q)) 1345 goto got_sig; 1346 else { 1347 errx(1, 1348 "illegal pid file or signal in config file:\n%s", 1349 errline); 1350 } 1351 } 1352 if (eol) 1353 q = NULL; 1354 else { 1355 q = parse = sob(parse + 1); /* Optional field */ 1356 *(parse = son(parse)) = '\0'; 1357 } 1358 1359 working->sig = SIGHUP; 1360 if (q && *q) { 1361got_sig: 1362 working->sig = parse_signal(q); 1363 if (working->sig < 1 || working->sig >= sys_nsig) { 1364 errx(1, 1365 "illegal signal in config file:\n%s", 1366 errline); 1367 } 1368 } 1369 1370 /* 1371 * Finish figuring out what pid-file to use (if any) in 1372 * later processing if this logfile needs to be rotated. 1373 */ 1374 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) { 1375 /* 1376 * This config-entry specified 'n' for nosignal, 1377 * see if it also specified an explicit pid_cmd_file. 1378 * This would be a pretty pointless combination. 1379 */ 1380 if (working->pid_cmd_file != NULL) { 1381 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s", 1382 working->pid_cmd_file, errline); 1383 free(working->pid_cmd_file); 1384 working->pid_cmd_file = NULL; 1385 } 1386 } else if (working->pid_cmd_file == NULL) { 1387 /* 1388 * This entry did not specify the 'n' flag, which 1389 * means it should signal syslogd unless it had 1390 * specified some other pid-file (and obviously the 1391 * syslog pid-file will not be for a process-group). 1392 * Also, we should only try to notify syslog if we 1393 * are root. 1394 */ 1395 if (working->flags & CE_SIGNALGROUP) { 1396 warnx("Ignoring flag 'U' in line:\n%s", 1397 errline); 1398 working->flags &= ~CE_SIGNALGROUP; 1399 } 1400 if (needroot) 1401 working->pid_cmd_file = strdup(path_syslogpid); 1402 } 1403 1404 /* 1405 * Add this entry to the appropriate list of entries, unless 1406 * it was some kind of special entry (eg: <default>). 1407 */ 1408 if (special) { 1409 ; /* Do not add to any list */ 1410 } else if (working->flags & CE_GLOB) { 1411 STAILQ_INSERT_TAIL(glob_p, working, cf_nextp); 1412 } else { 1413 STAILQ_INSERT_TAIL(work_p, working, cf_nextp); 1414 } 1415 } 1416 if (errline != NULL) 1417 free(errline); 1418} 1419 1420static char * 1421missing_field(char *p, char *errline) 1422{ 1423 1424 if (!p || !*p) 1425 errx(1, "missing field in config file:\n%s", errline); 1426 return (p); 1427} 1428 1429/* 1430 * In our sort we return it in the reverse of what qsort normally 1431 * would do, as we want the newest files first. If we have two 1432 * entries with the same time we don't really care about order. 1433 * 1434 * Support function for qsort() in delete_oldest_timelog(). 1435 */ 1436static int 1437oldlog_entry_compare(const void *a, const void *b) 1438{ 1439 const struct oldlog_entry *ola = a, *olb = b; 1440 1441 if (ola->t > olb->t) 1442 return (-1); 1443 else if (ola->t < olb->t) 1444 return (1); 1445 else 1446 return (0); 1447} 1448 1449/* 1450 * Check whether the file corresponding to dp is an archive of the logfile 1451 * logfname, based on the timefnamefmt format string. Return true and fill out 1452 * tm if this is the case; otherwise return false. 1453 */ 1454static int 1455validate_old_timelog(int fd, const struct dirent *dp, const char *logfname, 1456 struct tm *tm) 1457{ 1458 struct stat sb; 1459 size_t logfname_len; 1460 char *s; 1461 int c; 1462 1463 logfname_len = strlen(logfname); 1464 1465 if (dp->d_type != DT_REG) { 1466 /* 1467 * Some filesystems (e.g. NFS) don't fill out the d_type field 1468 * and leave it set to DT_UNKNOWN; in this case we must obtain 1469 * the file type ourselves. 1470 */ 1471 if (dp->d_type != DT_UNKNOWN || 1472 fstatat(fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) != 0 || 1473 !S_ISREG(sb.st_mode)) 1474 return (0); 1475 } 1476 /* Ignore everything but files with our logfile prefix. */ 1477 if (strncmp(dp->d_name, logfname, logfname_len) != 0) 1478 return (0); 1479 /* Ignore the actual non-rotated logfile. */ 1480 if (dp->d_namlen == logfname_len) 1481 return (0); 1482 1483 /* 1484 * Make sure we created have found a logfile, so the 1485 * postfix is valid, IE format is: '.<time>(.[bgx]z)?'. 1486 */ 1487 if (dp->d_name[logfname_len] != '.') { 1488 if (verbose) 1489 printf("Ignoring %s which has unexpected " 1490 "extension '%s'\n", dp->d_name, 1491 &dp->d_name[logfname_len]); 1492 return (0); 1493 } 1494 memset(tm, 0, sizeof(*tm)); 1495 if ((s = strptime(&dp->d_name[logfname_len + 1], 1496 timefnamefmt, tm)) == NULL) { 1497 /* 1498 * We could special case "old" sequentially named logfiles here, 1499 * but we do not as that would require special handling to 1500 * decide which one was the oldest compared to "new" time based 1501 * logfiles. 1502 */ 1503 if (verbose) 1504 printf("Ignoring %s which does not " 1505 "match time format\n", dp->d_name); 1506 return (0); 1507 } 1508 1509 for (c = 0; c < COMPRESS_TYPES; c++) 1510 if (strcmp(s, compress_type[c].suffix) == 0) 1511 /* We're done. */ 1512 return (1); 1513 1514 if (verbose) 1515 printf("Ignoring %s which has unexpected extension '%s'\n", 1516 dp->d_name, s); 1517 1518 return (0); 1519} 1520 1521/* 1522 * Delete the oldest logfiles, when using time based filenames. 1523 */ 1524static void 1525delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir) 1526{ 1527 char *logfname, *s, *dir, errbuf[80]; 1528 int dir_fd, i, logcnt, max_logcnt; 1529 struct oldlog_entry *oldlogs; 1530 struct dirent *dp; 1531 const char *cdir; 1532 struct tm tm; 1533 DIR *dirp; 1534 1535 oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry)); 1536 max_logcnt = MAX_OLDLOGS; 1537 logcnt = 0; 1538 1539 if (archive_dir != NULL && archive_dir[0] != '\0') 1540 cdir = archive_dir; 1541 else 1542 if ((cdir = dirname(ent->log)) == NULL) 1543 err(1, "dirname()"); 1544 if ((dir = strdup(cdir)) == NULL) 1545 err(1, "strdup()"); 1546 1547 if ((s = basename(ent->log)) == NULL) 1548 err(1, "basename()"); 1549 if ((logfname = strdup(s)) == NULL) 1550 err(1, "strdup()"); 1551 if (strcmp(logfname, "/") == 0) 1552 errx(1, "Invalid log filename - became '/'"); 1553 1554 if (verbose > 2) 1555 printf("Searching for old logs in %s\n", dir); 1556 1557 /* First we create a 'list' of all archived logfiles */ 1558 if ((dirp = opendir(dir)) == NULL) 1559 err(1, "Cannot open log directory '%s'", dir); 1560 dir_fd = dirfd(dirp); 1561 while ((dp = readdir(dirp)) != NULL) { 1562 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0) 1563 continue; 1564 1565 /* 1566 * We should now have old an old rotated logfile, so 1567 * add it to the 'list'. 1568 */ 1569 if ((oldlogs[logcnt].t = timegm(&tm)) == -1) 1570 err(1, "Could not convert time string to time value"); 1571 if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL) 1572 err(1, "strdup()"); 1573 logcnt++; 1574 1575 /* 1576 * It is very unlikely we ever run out of space in the 1577 * logfile array from the default size, but lets 1578 * handle it anyway... 1579 */ 1580 if (logcnt >= max_logcnt) { 1581 max_logcnt *= 4; 1582 /* Detect integer overflow */ 1583 if (max_logcnt < logcnt) 1584 errx(1, "Too many old logfiles found"); 1585 oldlogs = realloc(oldlogs, 1586 max_logcnt * sizeof(struct oldlog_entry)); 1587 if (oldlogs == NULL) 1588 err(1, "realloc()"); 1589 } 1590 } 1591 1592 /* Second, if needed we delete oldest archived logfiles */ 1593 if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) { 1594 oldlogs = realloc(oldlogs, logcnt * 1595 sizeof(struct oldlog_entry)); 1596 if (oldlogs == NULL) 1597 err(1, "realloc()"); 1598 1599 /* 1600 * We now sort the logs in the order of newest to 1601 * oldest. That way we can simply skip over the 1602 * number of records we want to keep. 1603 */ 1604 qsort(oldlogs, logcnt, sizeof(struct oldlog_entry), 1605 oldlog_entry_compare); 1606 for (i = ent->numlogs - 1; i < logcnt; i++) { 1607 if (noaction) 1608 printf("\trm -f %s/%s\n", dir, 1609 oldlogs[i].fname); 1610 else if (unlinkat(dir_fd, oldlogs[i].fname, 0) != 0) { 1611 snprintf(errbuf, sizeof(errbuf), 1612 "Could not delete old logfile '%s'", 1613 oldlogs[i].fname); 1614 perror(errbuf); 1615 } 1616 } 1617 } else if (verbose > 1) 1618 printf("No old logs to delete for logfile %s\n", ent->log); 1619 1620 /* Third, cleanup */ 1621 closedir(dirp); 1622 for (i = 0; i < logcnt; i++) { 1623 assert(oldlogs[i].fname != NULL); 1624 free(oldlogs[i].fname); 1625 } 1626 free(oldlogs); 1627 free(logfname); 1628 free(dir); 1629} 1630 1631/* 1632 * Generate a log filename, when using classic filenames. 1633 */ 1634static void 1635gen_classiclog_fname(char *fname, size_t fname_sz, const char *archive_dir, 1636 const char *namepart, int numlogs_c) 1637{ 1638 1639 if (archive_dir[0] != '\0') 1640 (void) snprintf(fname, fname_sz, "%s/%s.%d", archive_dir, 1641 namepart, numlogs_c); 1642 else 1643 (void) snprintf(fname, fname_sz, "%s.%d", namepart, numlogs_c); 1644} 1645 1646/* 1647 * Delete a rotated logfile, when using classic filenames. 1648 */ 1649static void 1650delete_classiclog(const char *archive_dir, const char *namepart, int numlog_c) 1651{ 1652 char file1[MAXPATHLEN], zfile1[MAXPATHLEN]; 1653 int c; 1654 1655 gen_classiclog_fname(file1, sizeof(file1), archive_dir, namepart, 1656 numlog_c); 1657 1658 for (c = 0; c < COMPRESS_TYPES; c++) { 1659 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1, 1660 compress_type[c].suffix); 1661 if (noaction) 1662 printf("\trm -f %s\n", zfile1); 1663 else 1664 (void) unlink(zfile1); 1665 } 1666} 1667 1668/* 1669 * Only add to the queue if the file hasn't already been added. This is 1670 * done to prevent circular include loops. 1671 */ 1672static void 1673add_to_queue(const char *fname, struct ilist *inclist) 1674{ 1675 struct include_entry *inc; 1676 1677 STAILQ_FOREACH(inc, inclist, inc_nextp) { 1678 if (strcmp(fname, inc->file) == 0) { 1679 warnx("duplicate include detected: %s", fname); 1680 return; 1681 } 1682 } 1683 1684 inc = malloc(sizeof(struct include_entry)); 1685 if (inc == NULL) 1686 err(1, "malloc of inc"); 1687 inc->file = strdup(fname); 1688 1689 if (verbose > 2) 1690 printf("\t+ Adding %s to the processing queue.\n", fname); 1691 1692 STAILQ_INSERT_TAIL(inclist, inc, inc_nextp); 1693} 1694 1695/* 1696 * Search for logfile and return its compression suffix (if supported) 1697 * The suffix detection is first-match in the order of compress_types 1698 * 1699 * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE) 1700 * a zero-length string is returned 1701 */ 1702static const char * 1703get_logfile_suffix(const char *logfile) 1704{ 1705 struct stat st; 1706 char zfile[MAXPATHLEN]; 1707 int c; 1708 1709 for (c = 0; c < COMPRESS_TYPES; c++) { 1710 (void) strlcpy(zfile, logfile, MAXPATHLEN); 1711 (void) strlcat(zfile, compress_type[c].suffix, MAXPATHLEN); 1712 if (lstat(zfile, &st) == 0) 1713 return (compress_type[c].suffix); 1714 } 1715 return (NULL); 1716} 1717 1718static fk_entry 1719do_rotate(const struct conf_entry *ent) 1720{ 1721 char dirpart[MAXPATHLEN], namepart[MAXPATHLEN]; 1722 char file1[MAXPATHLEN], file2[MAXPATHLEN]; 1723 char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN]; 1724 const char *logfile_suffix; 1725 char datetimestr[30]; 1726 int flags, numlogs_c; 1727 fk_entry free_or_keep; 1728 struct sigwork_entry *swork; 1729 struct stat st; 1730 struct tm tm; 1731 time_t now; 1732 1733 flags = ent->flags; 1734 free_or_keep = FREE_ENT; 1735 1736 if (archtodir) { 1737 char *p; 1738 1739 /* build complete name of archive directory into dirpart */ 1740 if (*archdirname == '/') { /* absolute */ 1741 strlcpy(dirpart, archdirname, sizeof(dirpart)); 1742 } else { /* relative */ 1743 /* get directory part of logfile */ 1744 strlcpy(dirpart, ent->log, sizeof(dirpart)); 1745 if ((p = strrchr(dirpart, '/')) == NULL) 1746 dirpart[0] = '\0'; 1747 else 1748 *(p + 1) = '\0'; 1749 strlcat(dirpart, archdirname, sizeof(dirpart)); 1750 } 1751 1752 /* check if archive directory exists, if not, create it */ 1753 if (lstat(dirpart, &st)) 1754 createdir(ent, dirpart); 1755 1756 /* get filename part of logfile */ 1757 if ((p = strrchr(ent->log, '/')) == NULL) 1758 strlcpy(namepart, ent->log, sizeof(namepart)); 1759 else 1760 strlcpy(namepart, p + 1, sizeof(namepart)); 1761 } else { 1762 /* 1763 * Tell utility functions we are not using an archive 1764 * dir. 1765 */ 1766 dirpart[0] = '\0'; 1767 strlcpy(namepart, ent->log, sizeof(namepart)); 1768 } 1769 1770 /* Delete old logs */ 1771 if (timefnamefmt != NULL) 1772 delete_oldest_timelog(ent, dirpart); 1773 else { 1774 /* 1775 * Handle cleaning up after legacy newsyslog where we 1776 * kept ent->numlogs + 1 files. This code can go away 1777 * at some point in the future. 1778 */ 1779 delete_classiclog(dirpart, namepart, ent->numlogs); 1780 1781 if (ent->numlogs > 0) 1782 delete_classiclog(dirpart, namepart, ent->numlogs - 1); 1783 1784 } 1785 1786 if (timefnamefmt != NULL) { 1787 /* If time functions fails we can't really do any sensible */ 1788 if (time(&now) == (time_t)-1 || 1789 localtime_r(&now, &tm) == NULL) 1790 bzero(&tm, sizeof(tm)); 1791 1792 strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm); 1793 if (archtodir) 1794 (void) snprintf(file1, sizeof(file1), "%s/%s.%s", 1795 dirpart, namepart, datetimestr); 1796 else 1797 (void) snprintf(file1, sizeof(file1), "%s.%s", 1798 ent->log, datetimestr); 1799 1800 /* Don't run the code to move down logs */ 1801 numlogs_c = -1; 1802 } else { 1803 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart, 1804 ent->numlogs - 1); 1805 numlogs_c = ent->numlogs - 2; /* copy for countdown */ 1806 } 1807 1808 /* Move down log files */ 1809 for (; numlogs_c >= 0; numlogs_c--) { 1810 (void) strlcpy(file2, file1, sizeof(file2)); 1811 1812 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart, 1813 numlogs_c); 1814 1815 logfile_suffix = get_logfile_suffix(file1); 1816 if (logfile_suffix == NULL) 1817 continue; 1818 (void) strlcpy(zfile1, file1, MAXPATHLEN); 1819 (void) strlcpy(zfile2, file2, MAXPATHLEN); 1820 (void) strlcat(zfile1, logfile_suffix, MAXPATHLEN); 1821 (void) strlcat(zfile2, logfile_suffix, MAXPATHLEN); 1822 1823 if (noaction) 1824 printf("\tmv %s %s\n", zfile1, zfile2); 1825 else { 1826 /* XXX - Ought to be checking for failure! */ 1827 (void)rename(zfile1, zfile2); 1828 } 1829 change_attrs(zfile2, ent); 1830 } 1831 1832 if (ent->numlogs > 0) { 1833 if (noaction) { 1834 /* 1835 * Note that savelog() may succeed with using link() 1836 * for the archtodir case, but there is no good way 1837 * of knowing if it will when doing "noaction", so 1838 * here we claim that it will have to do a copy... 1839 */ 1840 if (archtodir) 1841 printf("\tcp %s %s\n", ent->log, file1); 1842 else 1843 printf("\tln %s %s\n", ent->log, file1); 1844 printf("\ttouch %s\t\t" 1845 "# Update mtime for 'when'-interval processing\n", 1846 file1); 1847 } else { 1848 if (!(flags & CE_BINARY)) { 1849 /* Report the trimming to the old log */ 1850 log_trim(ent->log, ent); 1851 } 1852 savelog(ent->log, file1); 1853 /* 1854 * Interval-based rotations are done using the mtime of 1855 * the most recently archived log, so make sure it gets 1856 * updated during a rotation. 1857 */ 1858 utimes(file1, NULL); 1859 } 1860 change_attrs(file1, ent); 1861 } 1862 1863 /* Create the new log file and move it into place */ 1864 if (noaction) 1865 printf("Start new log...\n"); 1866 createlog(ent); 1867 1868 /* 1869 * Save all signalling and file-compression to be done after log 1870 * files from all entries have been rotated. This way any one 1871 * process will not be sent the same signal multiple times when 1872 * multiple log files had to be rotated. 1873 */ 1874 swork = NULL; 1875 if (ent->pid_cmd_file != NULL) 1876 swork = save_sigwork(ent); 1877 if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) { 1878 /* 1879 * The zipwork_entry will include a pointer to this 1880 * conf_entry, so the conf_entry should not be freed. 1881 */ 1882 free_or_keep = KEEP_ENT; 1883 save_zipwork(ent, swork, ent->fsize, file1); 1884 } 1885 1886 return (free_or_keep); 1887} 1888 1889static void 1890do_sigwork(struct sigwork_entry *swork) 1891{ 1892 struct sigwork_entry *nextsig; 1893 int kres, secs; 1894 char *tmp; 1895 1896 if (swork->sw_runcmd == 0 && (!(swork->sw_pidok) || swork->sw_pid == 0)) 1897 return; /* no work to do... */ 1898 1899 /* 1900 * If nosignal (-s) was specified, then do not signal any process. 1901 * Note that a nosignal request triggers a warning message if the 1902 * rotated logfile needs to be compressed, *unless* -R was also 1903 * specified. We assume that an `-sR' request came from a process 1904 * which writes to the logfile, and as such, we assume that process 1905 * has already made sure the logfile is not presently in use. This 1906 * just sets swork->sw_pidok to a special value, and do_zipwork 1907 * will print any necessary warning(s). 1908 */ 1909 if (nosignal) { 1910 if (!rotatereq) 1911 swork->sw_pidok = -1; 1912 return; 1913 } 1914 1915 /* 1916 * Compute the pause between consecutive signals. Use a longer 1917 * sleep time if we will be sending two signals to the same 1918 * daemon or process-group. 1919 */ 1920 secs = 0; 1921 nextsig = SLIST_NEXT(swork, sw_nextp); 1922 if (nextsig != NULL) { 1923 if (swork->sw_pid == nextsig->sw_pid) 1924 secs = 10; 1925 else 1926 secs = 1; 1927 } 1928 1929 if (noaction) { 1930 if (swork->sw_runcmd) 1931 printf("\tsh -c '%s %d'\n", swork->sw_fname, 1932 swork->sw_signum); 1933 else { 1934 printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum, 1935 (int)swork->sw_pid, swork->sw_fname); 1936 if (secs > 0) 1937 printf("\tsleep %d\n", secs); 1938 } 1939 return; 1940 } 1941 1942 if (swork->sw_runcmd) { 1943 asprintf(&tmp, "%s %d", swork->sw_fname, swork->sw_signum); 1944 if (tmp == NULL) { 1945 warn("can't allocate memory to run %s", 1946 swork->sw_fname); 1947 return; 1948 } 1949 if (verbose) 1950 printf("Run command: %s\n", tmp); 1951 kres = system(tmp); 1952 if (kres) { 1953 warnx("%s: returned non-zero exit code: %d", 1954 tmp, kres); 1955 } 1956 free(tmp); 1957 return; 1958 } 1959 1960 kres = kill(swork->sw_pid, swork->sw_signum); 1961 if (kres != 0) { 1962 /* 1963 * Assume that "no such process" (ESRCH) is something 1964 * to warn about, but is not an error. Presumably the 1965 * process which writes to the rotated log file(s) is 1966 * gone, in which case we should have no problem with 1967 * compressing the rotated log file(s). 1968 */ 1969 if (errno != ESRCH) 1970 swork->sw_pidok = 0; 1971 warn("can't notify %s, pid %d = %s", swork->sw_pidtype, 1972 (int)swork->sw_pid, swork->sw_fname); 1973 } else { 1974 if (verbose) 1975 printf("Notified %s pid %d = %s\n", swork->sw_pidtype, 1976 (int)swork->sw_pid, swork->sw_fname); 1977 if (secs > 0) { 1978 if (verbose) 1979 printf("Pause %d second(s) between signals\n", 1980 secs); 1981 sleep(secs); 1982 } 1983 } 1984} 1985 1986static void 1987do_zipwork(struct zipwork_entry *zwork) 1988{ 1989 const char *pgm_name, *pgm_path; 1990 int errsav, fcount, zstatus; 1991 pid_t pidzip, wpid; 1992 char zresult[MAXPATHLEN]; 1993 int c; 1994 1995 assert(zwork != NULL); 1996 pgm_path = NULL; 1997 strlcpy(zresult, zwork->zw_fname, sizeof(zresult)); 1998 if (zwork->zw_conf != NULL && 1999 zwork->zw_conf->compress > COMPRESS_NONE) 2000 for (c = 1; c < COMPRESS_TYPES; c++) { 2001 if (zwork->zw_conf->compress == c) { 2002 pgm_path = compress_type[c].path; 2003 (void) strlcat(zresult, 2004 compress_type[c].suffix, sizeof(zresult)); 2005 break; 2006 } 2007 } 2008 if (pgm_path == NULL) { 2009 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname); 2010 return; 2011 } 2012 pgm_name = strrchr(pgm_path, '/'); 2013 if (pgm_name == NULL) 2014 pgm_name = pgm_path; 2015 else 2016 pgm_name++; 2017 2018 if (zwork->zw_swork != NULL && zwork->zw_swork->sw_runcmd == 0 && 2019 zwork->zw_swork->sw_pidok <= 0) { 2020 warnx( 2021 "log %s not compressed because daemon(s) not notified", 2022 zwork->zw_fname); 2023 change_attrs(zwork->zw_fname, zwork->zw_conf); 2024 return; 2025 } 2026 2027 if (noaction) { 2028 printf("\t%s %s\n", pgm_name, zwork->zw_fname); 2029 change_attrs(zresult, zwork->zw_conf); 2030 return; 2031 } 2032 2033 fcount = 1; 2034 pidzip = fork(); 2035 while (pidzip < 0) { 2036 /* 2037 * The fork failed. If the failure was due to a temporary 2038 * problem, then wait a short time and try it again. 2039 */ 2040 errsav = errno; 2041 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname); 2042 if (errsav != EAGAIN || fcount > 5) 2043 errx(1, "Exiting..."); 2044 sleep(fcount * 12); 2045 fcount++; 2046 pidzip = fork(); 2047 } 2048 if (!pidzip) { 2049 /* The child process executes the compression command */ 2050 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0); 2051 err(1, "execl(`%s -f %s')", pgm_path, zwork->zw_fname); 2052 } 2053 2054 wpid = waitpid(pidzip, &zstatus, 0); 2055 if (wpid == -1) { 2056 /* XXX - should this be a fatal error? */ 2057 warn("%s: waitpid(%d)", pgm_path, pidzip); 2058 return; 2059 } 2060 if (!WIFEXITED(zstatus)) { 2061 warnx("`%s -f %s' did not terminate normally", pgm_name, 2062 zwork->zw_fname); 2063 return; 2064 } 2065 if (WEXITSTATUS(zstatus)) { 2066 warnx("`%s -f %s' terminated with a non-zero status (%d)", 2067 pgm_name, zwork->zw_fname, WEXITSTATUS(zstatus)); 2068 return; 2069 } 2070 2071 /* Compression was successful, set file attributes on the result. */ 2072 change_attrs(zresult, zwork->zw_conf); 2073} 2074 2075/* 2076 * Save information on any process we need to signal. Any single 2077 * process may need to be sent different signal-values for different 2078 * log files, but usually a single signal-value will cause the process 2079 * to close and re-open all of it's log files. 2080 */ 2081static struct sigwork_entry * 2082save_sigwork(const struct conf_entry *ent) 2083{ 2084 struct sigwork_entry *sprev, *stmp; 2085 int ndiff; 2086 size_t tmpsiz; 2087 2088 sprev = NULL; 2089 ndiff = 1; 2090 SLIST_FOREACH(stmp, &swhead, sw_nextp) { 2091 ndiff = strcmp(ent->pid_cmd_file, stmp->sw_fname); 2092 if (ndiff > 0) 2093 break; 2094 if (ndiff == 0) { 2095 if (ent->sig == stmp->sw_signum) 2096 break; 2097 if (ent->sig > stmp->sw_signum) { 2098 ndiff = 1; 2099 break; 2100 } 2101 } 2102 sprev = stmp; 2103 } 2104 if (stmp != NULL && ndiff == 0) 2105 return (stmp); 2106 2107 tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_cmd_file) + 1; 2108 stmp = malloc(tmpsiz); 2109 2110 stmp->sw_runcmd = 0; 2111 /* If this is a command to run we just set the flag and run command */ 2112 if (ent->flags & CE_PID2CMD) { 2113 stmp->sw_pid = -1; 2114 stmp->sw_pidok = 0; 2115 stmp->sw_runcmd = 1; 2116 } else { 2117 set_swpid(stmp, ent); 2118 } 2119 stmp->sw_signum = ent->sig; 2120 strcpy(stmp->sw_fname, ent->pid_cmd_file); 2121 if (sprev == NULL) 2122 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp); 2123 else 2124 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp); 2125 return (stmp); 2126} 2127 2128/* 2129 * Save information on any file we need to compress. We may see the same 2130 * file multiple times, so check the full list to avoid duplicates. The 2131 * list itself is sorted smallest-to-largest, because that's the order we 2132 * want to compress the files. If the partition is very low on disk space, 2133 * then the smallest files are the most likely to compress, and compressing 2134 * them first will free up more space for the larger files. 2135 */ 2136static struct zipwork_entry * 2137save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork, 2138 int zsize, const char *zipfname) 2139{ 2140 struct zipwork_entry *zprev, *ztmp; 2141 int ndiff; 2142 size_t tmpsiz; 2143 2144 /* Compute the size if the caller did not know it. */ 2145 if (zsize < 0) 2146 zsize = sizefile(zipfname); 2147 2148 zprev = NULL; 2149 ndiff = 1; 2150 SLIST_FOREACH(ztmp, &zwhead, zw_nextp) { 2151 ndiff = strcmp(zipfname, ztmp->zw_fname); 2152 if (ndiff == 0) 2153 break; 2154 if (zsize > ztmp->zw_fsize) 2155 zprev = ztmp; 2156 } 2157 if (ztmp != NULL && ndiff == 0) 2158 return (ztmp); 2159 2160 tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1; 2161 ztmp = malloc(tmpsiz); 2162 ztmp->zw_conf = ent; 2163 ztmp->zw_swork = swork; 2164 ztmp->zw_fsize = zsize; 2165 strcpy(ztmp->zw_fname, zipfname); 2166 if (zprev == NULL) 2167 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp); 2168 else 2169 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp); 2170 return (ztmp); 2171} 2172 2173/* Send a signal to the pid specified by pidfile */ 2174static void 2175set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent) 2176{ 2177 FILE *f; 2178 long minok, maxok, rval; 2179 char *endp, *linep, line[BUFSIZ]; 2180 2181 minok = MIN_PID; 2182 maxok = MAX_PID; 2183 swork->sw_pidok = 0; 2184 swork->sw_pid = 0; 2185 swork->sw_pidtype = "daemon"; 2186 if (ent->flags & CE_SIGNALGROUP) { 2187 /* 2188 * If we are expected to signal a process-group when 2189 * rotating this logfile, then the value read in should 2190 * be the negative of a valid process ID. 2191 */ 2192 minok = -MAX_PID; 2193 maxok = -MIN_PID; 2194 swork->sw_pidtype = "process-group"; 2195 } 2196 2197 f = fopen(ent->pid_cmd_file, "r"); 2198 if (f == NULL) { 2199 if (errno == ENOENT && enforcepid == 0) { 2200 /* 2201 * Warn if the PID file doesn't exist, but do 2202 * not consider it an error. Most likely it 2203 * means the process has been terminated, 2204 * so it should be safe to rotate any log 2205 * files that the process would have been using. 2206 */ 2207 swork->sw_pidok = 1; 2208 warnx("pid file doesn't exist: %s", ent->pid_cmd_file); 2209 } else 2210 warn("can't open pid file: %s", ent->pid_cmd_file); 2211 return; 2212 } 2213 2214 if (fgets(line, BUFSIZ, f) == NULL) { 2215 /* 2216 * Warn if the PID file is empty, but do not consider 2217 * it an error. Most likely it means the process has 2218 * has terminated, so it should be safe to rotate any 2219 * log files that the process would have been using. 2220 */ 2221 if (feof(f) && enforcepid == 0) { 2222 swork->sw_pidok = 1; 2223 warnx("pid/cmd file is empty: %s", ent->pid_cmd_file); 2224 } else 2225 warn("can't read from pid file: %s", ent->pid_cmd_file); 2226 (void)fclose(f); 2227 return; 2228 } 2229 (void)fclose(f); 2230 2231 errno = 0; 2232 linep = line; 2233 while (*linep == ' ') 2234 linep++; 2235 rval = strtol(linep, &endp, 10); 2236 if (*endp != '\0' && !isspacech(*endp)) { 2237 warnx("pid file does not start with a valid number: %s", 2238 ent->pid_cmd_file); 2239 } else if (rval < minok || rval > maxok) { 2240 warnx("bad value '%ld' for process number in %s", 2241 rval, ent->pid_cmd_file); 2242 if (verbose) 2243 warnx("\t(expecting value between %ld and %ld)", 2244 minok, maxok); 2245 } else { 2246 swork->sw_pidok = 1; 2247 swork->sw_pid = rval; 2248 } 2249 2250 return; 2251} 2252 2253/* Log the fact that the logs were turned over */ 2254static int 2255log_trim(const char *logname, const struct conf_entry *log_ent) 2256{ 2257 FILE *f; 2258 const char *xtra; 2259 2260 if ((f = fopen(logname, "a")) == NULL) 2261 return (-1); 2262 xtra = ""; 2263 if (log_ent->def_cfg) 2264 xtra = " using <default> rule"; 2265 if (log_ent->firstcreate) 2266 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n", 2267 daytime, hostname, (int) getpid(), xtra); 2268 else if (log_ent->r_reason != NULL) 2269 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n", 2270 daytime, hostname, (int) getpid(), log_ent->r_reason, xtra); 2271 else 2272 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n", 2273 daytime, hostname, (int) getpid(), xtra); 2274 if (fclose(f) == EOF) 2275 err(1, "log_trim: fclose"); 2276 return (0); 2277} 2278 2279/* Return size in kilobytes of a file */ 2280static int 2281sizefile(const char *file) 2282{ 2283 struct stat sb; 2284 2285 if (stat(file, &sb) < 0) 2286 return (-1); 2287 return (kbytes(sb.st_size)); 2288} 2289 2290/* 2291 * Return the mtime of the most recent archive of the logfile, using timestamp 2292 * based filenames. 2293 */ 2294static time_t 2295mtime_old_timelog(const char *file) 2296{ 2297 struct stat sb; 2298 struct tm tm; 2299 int dir_fd; 2300 time_t t; 2301 struct dirent *dp; 2302 DIR *dirp; 2303 char *s, *logfname, *dir; 2304 2305 t = -1; 2306 2307 if ((dir = dirname(file)) == NULL) { 2308 warn("dirname() of '%s'", file); 2309 return (t); 2310 } 2311 if ((s = basename(file)) == NULL) { 2312 warn("basename() of '%s'", file); 2313 return (t); 2314 } else if (s[0] == '/') { 2315 warnx("Invalid log filename '%s'", s); 2316 return (t); 2317 } else if ((logfname = strdup(s)) == NULL) 2318 err(1, "strdup()"); 2319 2320 if ((dirp = opendir(dir)) == NULL) { 2321 warn("Cannot open log directory '%s'", dir); 2322 return (t); 2323 } 2324 dir_fd = dirfd(dirp); 2325 /* Open the archive dir and find the most recent archive of logfname. */ 2326 while ((dp = readdir(dirp)) != NULL) { 2327 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0) 2328 continue; 2329 2330 if (fstatat(dir_fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) == -1) { 2331 warn("Cannot stat '%s'", file); 2332 continue; 2333 } 2334 if (t < sb.st_mtime) 2335 t = sb.st_mtime; 2336 } 2337 closedir(dirp); 2338 2339 return (t); 2340} 2341 2342/* Return the age in hours of the most recent archive of the logfile. */ 2343static int 2344age_old_log(const char *file) 2345{ 2346 struct stat sb; 2347 const char *logfile_suffix; 2348 char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1]; 2349 time_t mtime; 2350 2351 if (archtodir) { 2352 char *p; 2353 2354 /* build name of archive directory into tmp */ 2355 if (*archdirname == '/') { /* absolute */ 2356 strlcpy(tmp, archdirname, sizeof(tmp)); 2357 } else { /* relative */ 2358 /* get directory part of logfile */ 2359 strlcpy(tmp, file, sizeof(tmp)); 2360 if ((p = strrchr(tmp, '/')) == NULL) 2361 tmp[0] = '\0'; 2362 else 2363 *(p + 1) = '\0'; 2364 strlcat(tmp, archdirname, sizeof(tmp)); 2365 } 2366 2367 strlcat(tmp, "/", sizeof(tmp)); 2368 2369 /* get filename part of logfile */ 2370 if ((p = strrchr(file, '/')) == NULL) 2371 strlcat(tmp, file, sizeof(tmp)); 2372 else 2373 strlcat(tmp, p + 1, sizeof(tmp)); 2374 } else { 2375 (void) strlcpy(tmp, file, sizeof(tmp)); 2376 } 2377 2378 if (timefnamefmt != NULL) { 2379 mtime = mtime_old_timelog(tmp); 2380 if (mtime == -1) 2381 return (-1); 2382 } else { 2383 strlcat(tmp, ".0", sizeof(tmp)); 2384 logfile_suffix = get_logfile_suffix(tmp); 2385 if (logfile_suffix == NULL) 2386 return (-1); 2387 (void) strlcat(tmp, logfile_suffix, sizeof(tmp)); 2388 if (stat(tmp, &sb) < 0) 2389 return (-1); 2390 mtime = sb.st_mtime; 2391 } 2392 2393 return ((int)(ptimeget_secs(timenow) - mtime + 1800) / 3600); 2394} 2395 2396/* Skip Over Blanks */ 2397static char * 2398sob(char *p) 2399{ 2400 while (p && *p && isspace(*p)) 2401 p++; 2402 return (p); 2403} 2404 2405/* Skip Over Non-Blanks */ 2406static char * 2407son(char *p) 2408{ 2409 while (p && *p && !isspace(*p)) 2410 p++; 2411 return (p); 2412} 2413 2414/* Check if string is actually a number */ 2415static int 2416isnumberstr(const char *string) 2417{ 2418 while (*string) { 2419 if (!isdigitch(*string++)) 2420 return (0); 2421 } 2422 return (1); 2423} 2424 2425/* Check if string contains a glob */ 2426static int 2427isglobstr(const char *string) 2428{ 2429 char chr; 2430 2431 while ((chr = *string++)) { 2432 if (chr == '*' || chr == '?' || chr == '[') 2433 return (1); 2434 } 2435 return (0); 2436} 2437 2438/* 2439 * Save the active log file under a new name. A link to the new name 2440 * is the quick-and-easy way to do this. If that fails (which it will 2441 * if the destination is on another partition), then make a copy of 2442 * the file to the new location. 2443 */ 2444static void 2445savelog(char *from, char *to) 2446{ 2447 FILE *src, *dst; 2448 int c, res; 2449 2450 res = link(from, to); 2451 if (res == 0) 2452 return; 2453 2454 if ((src = fopen(from, "r")) == NULL) 2455 err(1, "can't fopen %s for reading", from); 2456 if ((dst = fopen(to, "w")) == NULL) 2457 err(1, "can't fopen %s for writing", to); 2458 2459 while ((c = getc(src)) != EOF) { 2460 if ((putc(c, dst)) == EOF) 2461 err(1, "error writing to %s", to); 2462 } 2463 2464 if (ferror(src)) 2465 err(1, "error reading from %s", from); 2466 if ((fclose(src)) != 0) 2467 err(1, "can't fclose %s", to); 2468 if ((fclose(dst)) != 0) 2469 err(1, "can't fclose %s", from); 2470} 2471 2472/* create one or more directory components of a path */ 2473static void 2474createdir(const struct conf_entry *ent, char *dirpart) 2475{ 2476 int res; 2477 char *s, *d; 2478 char mkdirpath[MAXPATHLEN]; 2479 struct stat st; 2480 2481 s = dirpart; 2482 d = mkdirpath; 2483 2484 for (;;) { 2485 *d++ = *s++; 2486 if (*s != '/' && *s != '\0') 2487 continue; 2488 *d = '\0'; 2489 res = lstat(mkdirpath, &st); 2490 if (res != 0) { 2491 if (noaction) { 2492 printf("\tmkdir %s\n", mkdirpath); 2493 } else { 2494 res = mkdir(mkdirpath, 0755); 2495 if (res != 0) 2496 err(1, "Error on mkdir(\"%s\") for -a", 2497 mkdirpath); 2498 } 2499 } 2500 if (*s == '\0') 2501 break; 2502 } 2503 if (verbose) { 2504 if (ent->firstcreate) 2505 printf("Created directory '%s' for new %s\n", 2506 dirpart, ent->log); 2507 else 2508 printf("Created directory '%s' for -a\n", dirpart); 2509 } 2510} 2511 2512/* 2513 * Create a new log file, destroying any currently-existing version 2514 * of the log file in the process. If the caller wants a backup copy 2515 * of the file to exist, they should call 'link(logfile,logbackup)' 2516 * before calling this routine. 2517 */ 2518void 2519createlog(const struct conf_entry *ent) 2520{ 2521 int fd, failed; 2522 struct stat st; 2523 char *realfile, *slash, tempfile[MAXPATHLEN]; 2524 2525 fd = -1; 2526 realfile = ent->log; 2527 2528 /* 2529 * If this log file is being created for the first time (-C option), 2530 * then it may also be true that the parent directory does not exist 2531 * yet. Check, and create that directory if it is missing. 2532 */ 2533 if (ent->firstcreate) { 2534 strlcpy(tempfile, realfile, sizeof(tempfile)); 2535 slash = strrchr(tempfile, '/'); 2536 if (slash != NULL) { 2537 *slash = '\0'; 2538 failed = stat(tempfile, &st); 2539 if (failed && errno != ENOENT) 2540 err(1, "Error on stat(%s)", tempfile); 2541 if (failed) 2542 createdir(ent, tempfile); 2543 else if (!S_ISDIR(st.st_mode)) 2544 errx(1, "%s exists but is not a directory", 2545 tempfile); 2546 } 2547 } 2548 2549 /* 2550 * First create an unused filename, so it can be chown'ed and 2551 * chmod'ed before it is moved into the real location. mkstemp 2552 * will create the file mode=600 & owned by us. Note that all 2553 * temp files will have a suffix of '.z<something>'. 2554 */ 2555 strlcpy(tempfile, realfile, sizeof(tempfile)); 2556 strlcat(tempfile, ".zXXXXXX", sizeof(tempfile)); 2557 if (noaction) 2558 printf("\tmktemp %s\n", tempfile); 2559 else { 2560 fd = mkstemp(tempfile); 2561 if (fd < 0) 2562 err(1, "can't mkstemp logfile %s", tempfile); 2563 2564 /* 2565 * Add status message to what will become the new log file. 2566 */ 2567 if (!(ent->flags & CE_BINARY)) { 2568 if (log_trim(tempfile, ent)) 2569 err(1, "can't add status message to log"); 2570 } 2571 } 2572 2573 /* Change the owner/group, if we are supposed to */ 2574 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2575 if (noaction) 2576 printf("\tchown %u:%u %s\n", ent->uid, ent->gid, 2577 tempfile); 2578 else { 2579 failed = fchown(fd, ent->uid, ent->gid); 2580 if (failed) 2581 err(1, "can't fchown temp file %s", tempfile); 2582 } 2583 } 2584 2585 /* Turn on NODUMP if it was requested in the config-file. */ 2586 if (ent->flags & CE_NODUMP) { 2587 if (noaction) 2588 printf("\tchflags nodump %s\n", tempfile); 2589 else { 2590 failed = fchflags(fd, UF_NODUMP); 2591 if (failed) { 2592 warn("log_trim: fchflags(NODUMP)"); 2593 } 2594 } 2595 } 2596 2597 /* 2598 * Note that if the real logfile still exists, and if the call 2599 * to rename() fails, then "neither the old file nor the new 2600 * file shall be changed or created" (to quote the standard). 2601 * If the call succeeds, then the file will be replaced without 2602 * any window where some other process might find that the file 2603 * did not exist. 2604 * XXX - ? It may be that for some error conditions, we could 2605 * retry by first removing the realfile and then renaming. 2606 */ 2607 if (noaction) { 2608 printf("\tchmod %o %s\n", ent->permissions, tempfile); 2609 printf("\tmv %s %s\n", tempfile, realfile); 2610 } else { 2611 failed = fchmod(fd, ent->permissions); 2612 if (failed) 2613 err(1, "can't fchmod temp file '%s'", tempfile); 2614 failed = rename(tempfile, realfile); 2615 if (failed) 2616 err(1, "can't mv %s to %s", tempfile, realfile); 2617 } 2618 2619 if (fd >= 0) 2620 close(fd); 2621} 2622 2623/* 2624 * Change the attributes of a given filename to what was specified in 2625 * the newsyslog.conf entry. This routine is only called for files 2626 * that newsyslog expects that it has created, and thus it is a fatal 2627 * error if this routine finds that the file does not exist. 2628 */ 2629static void 2630change_attrs(const char *fname, const struct conf_entry *ent) 2631{ 2632 int failed; 2633 2634 if (noaction) { 2635 printf("\tchmod %o %s\n", ent->permissions, fname); 2636 2637 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) 2638 printf("\tchown %u:%u %s\n", 2639 ent->uid, ent->gid, fname); 2640 2641 if (ent->flags & CE_NODUMP) 2642 printf("\tchflags nodump %s\n", fname); 2643 return; 2644 } 2645 2646 failed = chmod(fname, ent->permissions); 2647 if (failed) { 2648 if (errno != EPERM) 2649 err(1, "chmod(%s) in change_attrs", fname); 2650 warn("change_attrs couldn't chmod(%s)", fname); 2651 } 2652 2653 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2654 failed = chown(fname, ent->uid, ent->gid); 2655 if (failed) 2656 warn("can't chown %s", fname); 2657 } 2658 2659 if (ent->flags & CE_NODUMP) { 2660 failed = chflags(fname, UF_NODUMP); 2661 if (failed) 2662 warn("can't chflags %s NODUMP", fname); 2663 } 2664} 2665 2666/* 2667 * Parse a signal number or signal name. Returns the signal number parsed or -1 2668 * on failure. 2669 */ 2670static int 2671parse_signal(const char *str) 2672{ 2673 int sig, i; 2674 const char *errstr; 2675 2676 sig = strtonum(str, 1, sys_nsig - 1, &errstr); 2677 2678 if (errstr == NULL) 2679 return (sig); 2680 if (strncasecmp(str, "SIG", 3) == 0) 2681 str += 3; 2682 2683 for (i = 1; i < sys_nsig; i++) { 2684 if (strcasecmp(str, sys_signame[i]) == 0) 2685 return (i); 2686 } 2687 2688 return (-1); 2689} 2690