newsyslog.c revision 293290
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 293290 2016-01-07 00:40:51Z bdrewery $"); 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 (noaction) 337 printf("\tsleep 10\n"); 338 else { 339 if (verbose) 340 printf("Pause 10 seconds to allow daemon(s)" 341 " to close log file(s)\n"); 342 sleep(10); 343 } 344 } 345 /* 346 * Compress all files that we're expected to compress, now 347 * that all processes should have closed the files which 348 * have been rotated. 349 */ 350 if (!SLIST_EMPTY(&zwhead)) { 351 if (noaction || verbose) 352 printf("Compress all rotated log file(s)...\n"); 353 while (!SLIST_EMPTY(&zwhead)) { 354 ztmp = SLIST_FIRST(&zwhead); 355 do_zipwork(ztmp); 356 SLIST_REMOVE_HEAD(&zwhead, zw_nextp); 357 free(ztmp); 358 } 359 } 360 /* Now free all the sigwork entries. */ 361 while (!SLIST_EMPTY(&swhead)) { 362 stmp = SLIST_FIRST(&swhead); 363 SLIST_REMOVE_HEAD(&swhead, sw_nextp); 364 free(stmp); 365 } 366 367 while (wait(NULL) > 0 || errno == EINTR) 368 ; 369 return (0); 370} 371 372static struct conf_entry * 373init_entry(const char *fname, struct conf_entry *src_entry) 374{ 375 struct conf_entry *tempwork; 376 377 if (verbose > 4) 378 printf("\t--> [creating entry for %s]\n", fname); 379 380 tempwork = malloc(sizeof(struct conf_entry)); 381 if (tempwork == NULL) 382 err(1, "malloc of conf_entry for %s", fname); 383 384 if (destdir == NULL || fname[0] != '/') 385 tempwork->log = strdup(fname); 386 else 387 asprintf(&tempwork->log, "%s%s", destdir, fname); 388 if (tempwork->log == NULL) 389 err(1, "strdup for %s", fname); 390 391 if (src_entry != NULL) { 392 tempwork->pid_cmd_file = NULL; 393 if (src_entry->pid_cmd_file) 394 tempwork->pid_cmd_file = strdup(src_entry->pid_cmd_file); 395 tempwork->r_reason = NULL; 396 tempwork->firstcreate = 0; 397 tempwork->rotate = 0; 398 tempwork->fsize = -1; 399 tempwork->uid = src_entry->uid; 400 tempwork->gid = src_entry->gid; 401 tempwork->numlogs = src_entry->numlogs; 402 tempwork->trsize = src_entry->trsize; 403 tempwork->hours = src_entry->hours; 404 tempwork->trim_at = NULL; 405 if (src_entry->trim_at != NULL) 406 tempwork->trim_at = ptime_init(src_entry->trim_at); 407 tempwork->permissions = src_entry->permissions; 408 tempwork->flags = src_entry->flags; 409 tempwork->compress = src_entry->compress; 410 tempwork->sig = src_entry->sig; 411 tempwork->def_cfg = src_entry->def_cfg; 412 } else { 413 /* Initialize as a "do-nothing" entry */ 414 tempwork->pid_cmd_file = NULL; 415 tempwork->r_reason = NULL; 416 tempwork->firstcreate = 0; 417 tempwork->rotate = 0; 418 tempwork->fsize = -1; 419 tempwork->uid = (uid_t)-1; 420 tempwork->gid = (gid_t)-1; 421 tempwork->numlogs = 1; 422 tempwork->trsize = -1; 423 tempwork->hours = -1; 424 tempwork->trim_at = NULL; 425 tempwork->permissions = 0; 426 tempwork->flags = 0; 427 tempwork->compress = COMPRESS_NONE; 428 tempwork->sig = SIGHUP; 429 tempwork->def_cfg = 0; 430 } 431 432 return (tempwork); 433} 434 435static void 436free_entry(struct conf_entry *ent) 437{ 438 439 if (ent == NULL) 440 return; 441 442 if (ent->log != NULL) { 443 if (verbose > 4) 444 printf("\t--> [freeing entry for %s]\n", ent->log); 445 free(ent->log); 446 ent->log = NULL; 447 } 448 449 if (ent->pid_cmd_file != NULL) { 450 free(ent->pid_cmd_file); 451 ent->pid_cmd_file = NULL; 452 } 453 454 if (ent->r_reason != NULL) { 455 free(ent->r_reason); 456 ent->r_reason = NULL; 457 } 458 459 if (ent->trim_at != NULL) { 460 ptime_free(ent->trim_at); 461 ent->trim_at = NULL; 462 } 463 464 free(ent); 465} 466 467static void 468free_clist(struct cflist *list) 469{ 470 struct conf_entry *ent; 471 472 while (!STAILQ_EMPTY(list)) { 473 ent = STAILQ_FIRST(list); 474 STAILQ_REMOVE_HEAD(list, cf_nextp); 475 free_entry(ent); 476 } 477 478 free(list); 479 list = NULL; 480} 481 482static fk_entry 483do_entry(struct conf_entry * ent) 484{ 485#define REASON_MAX 80 486 int modtime; 487 fk_entry free_or_keep; 488 double diffsecs; 489 char temp_reason[REASON_MAX]; 490 int oversized; 491 492 free_or_keep = FREE_ENT; 493 if (verbose) 494 printf("%s <%d%s>: ", ent->log, ent->numlogs, 495 compress_type[ent->compress].flag); 496 ent->fsize = sizefile(ent->log); 497 oversized = ((ent->trsize > 0) && (ent->fsize >= ent->trsize)); 498 modtime = age_old_log(ent->log); 499 ent->rotate = 0; 500 ent->firstcreate = 0; 501 if (ent->fsize < 0) { 502 /* 503 * If either the C flag or the -C option was specified, 504 * and if we won't be creating the file, then have the 505 * verbose message include a hint as to why the file 506 * will not be created. 507 */ 508 temp_reason[0] = '\0'; 509 if (createlogs > 1) 510 ent->firstcreate = 1; 511 else if ((ent->flags & CE_CREATE) && createlogs) 512 ent->firstcreate = 1; 513 else if (ent->flags & CE_CREATE) 514 strlcpy(temp_reason, " (no -C option)", REASON_MAX); 515 else if (createlogs) 516 strlcpy(temp_reason, " (no C flag)", REASON_MAX); 517 518 if (ent->firstcreate) { 519 if (verbose) 520 printf("does not exist -> will create.\n"); 521 createlog(ent); 522 } else if (verbose) { 523 printf("does not exist, skipped%s.\n", temp_reason); 524 } 525 } else { 526 if (ent->flags & CE_TRIMAT && !force && !rotatereq && 527 !oversized) { 528 diffsecs = ptimeget_diff(timenow, ent->trim_at); 529 if (diffsecs < 0.0) { 530 /* trim_at is some time in the future. */ 531 if (verbose) { 532 ptime_adjust4dst(ent->trim_at, 533 timenow); 534 printf("--> will trim at %s", 535 ptimeget_ctime(ent->trim_at)); 536 } 537 return (free_or_keep); 538 } else if (diffsecs >= 3600.0) { 539 /* 540 * trim_at is more than an hour in the past, 541 * so find the next valid trim_at time, and 542 * tell the user what that will be. 543 */ 544 if (verbose && dbg_at_times) 545 printf("\n\t--> prev trim at %s\t", 546 ptimeget_ctime(ent->trim_at)); 547 if (verbose) { 548 ptimeset_nxtime(ent->trim_at); 549 printf("--> will trim at %s", 550 ptimeget_ctime(ent->trim_at)); 551 } 552 return (free_or_keep); 553 } else if (verbose && noaction && dbg_at_times) { 554 /* 555 * If we are just debugging at-times, then 556 * a detailed message is helpful. Also 557 * skip "doing" any commands, since they 558 * would all be turned off by no-action. 559 */ 560 printf("\n\t--> timematch at %s", 561 ptimeget_ctime(ent->trim_at)); 562 return (free_or_keep); 563 } else if (verbose && ent->hours <= 0) { 564 printf("--> time is up\n"); 565 } 566 } 567 if (verbose && (ent->trsize > 0)) 568 printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize); 569 if (verbose && (ent->hours > 0)) 570 printf(" age (hr): %d [%d] ", modtime, ent->hours); 571 572 /* 573 * Figure out if this logfile needs to be rotated. 574 */ 575 temp_reason[0] = '\0'; 576 if (rotatereq) { 577 ent->rotate = 1; 578 snprintf(temp_reason, REASON_MAX, " due to -R from %s", 579 requestor); 580 } else if (force) { 581 ent->rotate = 1; 582 snprintf(temp_reason, REASON_MAX, " due to -F request"); 583 } else if (oversized) { 584 ent->rotate = 1; 585 snprintf(temp_reason, REASON_MAX, " due to size>%dK", 586 ent->trsize); 587 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) { 588 ent->rotate = 1; 589 } else if ((ent->hours > 0) && ((modtime >= ent->hours) || 590 (modtime < 0))) { 591 ent->rotate = 1; 592 } 593 594 /* 595 * If the file needs to be rotated, then rotate it. 596 */ 597 if (ent->rotate && !norotate) { 598 if (temp_reason[0] != '\0') 599 ent->r_reason = strdup(temp_reason); 600 if (verbose) 601 printf("--> trimming log....\n"); 602 if (noaction && !verbose) 603 printf("%s <%d%s>: trimming\n", ent->log, 604 ent->numlogs, 605 compress_type[ent->compress].flag); 606 free_or_keep = do_rotate(ent); 607 } else { 608 if (verbose) 609 printf("--> skipping\n"); 610 } 611 } 612 return (free_or_keep); 613#undef REASON_MAX 614} 615 616static void 617parse_args(int argc, char **argv) 618{ 619 int ch; 620 char *p; 621 622 timenow = ptime_init(NULL); 623 ptimeset_time(timenow, time(NULL)); 624 strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN); 625 626 /* Let's get our hostname */ 627 (void)gethostname(hostname, sizeof(hostname)); 628 629 /* Truncate domain */ 630 if ((p = strchr(hostname, '.')) != NULL) 631 *p = '\0'; 632 633 /* Parse command line options. */ 634 while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1) 635 switch (ch) { 636 case 'a': 637 archtodir++; 638 archdirname = optarg; 639 break; 640 case 'd': 641 destdir = optarg; 642 break; 643 case 'f': 644 conf = optarg; 645 break; 646 case 'n': 647 noaction++; 648 /* FALLTHROUGH */ 649 case 'r': 650 needroot = 0; 651 break; 652 case 's': 653 nosignal = 1; 654 break; 655 case 't': 656 if (optarg[0] == '\0' || 657 strcmp(optarg, "DEFAULT") == 0) 658 timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT); 659 else 660 timefnamefmt = strdup(optarg); 661 break; 662 case 'v': 663 verbose++; 664 break; 665 case 'C': 666 /* Useful for things like rc.diskless... */ 667 createlogs++; 668 break; 669 case 'D': 670 /* 671 * Set some debugging option. The specific option 672 * depends on the value of optarg. These options 673 * may come and go without notice or documentation. 674 */ 675 if (parse_doption(optarg)) 676 break; 677 usage(); 678 /* NOTREACHED */ 679 case 'F': 680 force++; 681 break; 682 case 'N': 683 norotate++; 684 break; 685 case 'P': 686 enforcepid++; 687 break; 688 case 'R': 689 rotatereq++; 690 requestor = strdup(optarg); 691 break; 692 case 'S': 693 path_syslogpid = optarg; 694 break; 695 case 'm': /* Used by OpenBSD for "monitor mode" */ 696 default: 697 usage(); 698 /* NOTREACHED */ 699 } 700 701 if (force && norotate) { 702 warnx("Only one of -F and -N may be specified."); 703 usage(); 704 /* NOTREACHED */ 705 } 706 707 if (rotatereq) { 708 if (optind == argc) { 709 warnx("At least one filename must be given when -R is specified."); 710 usage(); 711 /* NOTREACHED */ 712 } 713 /* Make sure "requestor" value is safe for a syslog message. */ 714 for (p = requestor; *p != '\0'; p++) { 715 if (!isprintch(*p) && (*p != '\t')) 716 *p = '.'; 717 } 718 } 719 720 if (dbg_timenow) { 721 /* 722 * Note that the 'daytime' variable is not changed. 723 * That is only used in messages that track when a 724 * logfile is rotated, and if a file *is* rotated, 725 * then it will still rotated at the "real now" time. 726 */ 727 ptime_free(timenow); 728 timenow = dbg_timenow; 729 fprintf(stderr, "Debug: Running as if TimeNow is %s", 730 ptimeget_ctime(dbg_timenow)); 731 } 732 733} 734 735/* 736 * These debugging options are mainly meant for developer use, such 737 * as writing regression-tests. They would not be needed by users 738 * during normal operation of newsyslog... 739 */ 740static int 741parse_doption(const char *doption) 742{ 743 const char TN[] = "TN="; 744 int res; 745 746 if (strncmp(doption, TN, sizeof(TN) - 1) == 0) { 747 /* 748 * The "TimeNow" debugging option. This might be off 749 * by an hour when crossing a timezone change. 750 */ 751 dbg_timenow = ptime_init(NULL); 752 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601, 753 time(NULL), doption + sizeof(TN) - 1); 754 if (res == -2) { 755 warnx("Non-existent time specified on -D %s", doption); 756 return (0); /* failure */ 757 } else if (res < 0) { 758 warnx("Malformed time given on -D %s", doption); 759 return (0); /* failure */ 760 } 761 return (1); /* successfully parsed */ 762 763 } 764 765 if (strcmp(doption, "ats") == 0) { 766 dbg_at_times++; 767 return (1); /* successfully parsed */ 768 } 769 770 /* XXX - This check could probably be dropped. */ 771 if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder") 772 == 0)) { 773 warnx("NOTE: newsyslog always uses 'neworder'."); 774 return (1); /* successfully parsed */ 775 } 776 777 warnx("Unknown -D (debug) option: '%s'", doption); 778 return (0); /* failure */ 779} 780 781static void 782usage(void) 783{ 784 785 fprintf(stderr, 786 "usage: newsyslog [-CFNPnrsv] [-a directory] [-d directory] [-f config_file]\n" 787 " [-S pidfile] [-t timefmt] [[-R tagname] file ...]\n"); 788 exit(1); 789} 790 791/* 792 * Parse a configuration file and return a linked list of all the logs 793 * which should be processed. 794 */ 795static struct cflist * 796get_worklist(char **files) 797{ 798 FILE *f; 799 char **given; 800 struct cflist *cmdlist, *filelist, *globlist; 801 struct conf_entry *defconf, *dupent, *ent; 802 struct ilist inclist; 803 struct include_entry *inc; 804 int gmatch, fnres; 805 806 defconf = NULL; 807 STAILQ_INIT(&inclist); 808 809 filelist = malloc(sizeof(struct cflist)); 810 if (filelist == NULL) 811 err(1, "malloc of filelist"); 812 STAILQ_INIT(filelist); 813 globlist = malloc(sizeof(struct cflist)); 814 if (globlist == NULL) 815 err(1, "malloc of globlist"); 816 STAILQ_INIT(globlist); 817 818 inc = malloc(sizeof(struct include_entry)); 819 if (inc == NULL) 820 err(1, "malloc of inc"); 821 inc->file = conf; 822 if (inc->file == NULL) 823 inc->file = _PATH_CONF; 824 STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp); 825 826 STAILQ_FOREACH(inc, &inclist, inc_nextp) { 827 if (strcmp(inc->file, "-") != 0) 828 f = fopen(inc->file, "r"); 829 else { 830 f = stdin; 831 inc->file = "<stdin>"; 832 } 833 if (!f) 834 err(1, "%s", inc->file); 835 836 if (verbose) 837 printf("Processing %s\n", inc->file); 838 parse_file(f, filelist, globlist, defconf, &inclist); 839 (void) fclose(f); 840 } 841 842 /* 843 * All config-file information has been read in and turned into 844 * a filelist and a globlist. If there were no specific files 845 * given on the run command, then the only thing left to do is to 846 * call a routine which finds all files matched by the globlist 847 * and adds them to the filelist. Then return the worklist. 848 */ 849 if (*files == NULL) { 850 expand_globs(filelist, globlist); 851 free_clist(globlist); 852 if (defconf != NULL) 853 free_entry(defconf); 854 return (filelist); 855 /* NOTREACHED */ 856 } 857 858 /* 859 * If newsyslog was given a specific list of files to process, 860 * it may be that some of those files were not listed in any 861 * config file. Those unlisted files should get the default 862 * rotation action. First, create the default-rotation action 863 * if none was found in a system config file. 864 */ 865 if (defconf == NULL) { 866 defconf = init_entry(DEFAULT_MARKER, NULL); 867 defconf->numlogs = 3; 868 defconf->trsize = 50; 869 defconf->permissions = S_IRUSR|S_IWUSR; 870 } 871 872 /* 873 * If newsyslog was run with a list of specific filenames, 874 * then create a new worklist which has only those files in 875 * it, picking up the rotation-rules for those files from 876 * the original filelist. 877 * 878 * XXX - Note that this will copy multiple rules for a single 879 * logfile, if multiple entries are an exact match for 880 * that file. That matches the historic behavior, but do 881 * we want to continue to allow it? If so, it should 882 * probably be handled more intelligently. 883 */ 884 cmdlist = malloc(sizeof(struct cflist)); 885 if (cmdlist == NULL) 886 err(1, "malloc of cmdlist"); 887 STAILQ_INIT(cmdlist); 888 889 for (given = files; *given; ++given) { 890 /* 891 * First try to find exact-matches for this given file. 892 */ 893 gmatch = 0; 894 STAILQ_FOREACH(ent, filelist, cf_nextp) { 895 if (strcmp(ent->log, *given) == 0) { 896 gmatch++; 897 dupent = init_entry(*given, ent); 898 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp); 899 } 900 } 901 if (gmatch) { 902 if (verbose > 2) 903 printf("\t+ Matched entry %s\n", *given); 904 continue; 905 } 906 907 /* 908 * There was no exact-match for this given file, so look 909 * for a "glob" entry which does match. 910 */ 911 gmatch = 0; 912 if (verbose > 2 && globlist != NULL) 913 printf("\t+ Checking globs for %s\n", *given); 914 STAILQ_FOREACH(ent, globlist, cf_nextp) { 915 fnres = fnmatch(ent->log, *given, FNM_PATHNAME); 916 if (verbose > 2) 917 printf("\t+ = %d for pattern %s\n", fnres, 918 ent->log); 919 if (fnres == 0) { 920 gmatch++; 921 dupent = init_entry(*given, ent); 922 /* This new entry is not a glob! */ 923 dupent->flags &= ~CE_GLOB; 924 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp); 925 /* Only allow a match to one glob-entry */ 926 break; 927 } 928 } 929 if (gmatch) { 930 if (verbose > 2) 931 printf("\t+ Matched %s via %s\n", *given, 932 ent->log); 933 continue; 934 } 935 936 /* 937 * This given file was not found in any config file, so 938 * add a worklist item based on the default entry. 939 */ 940 if (verbose > 2) 941 printf("\t+ No entry matched %s (will use %s)\n", 942 *given, DEFAULT_MARKER); 943 dupent = init_entry(*given, defconf); 944 /* Mark that it was *not* found in a config file */ 945 dupent->def_cfg = 1; 946 STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp); 947 } 948 949 /* 950 * Free all the entries in the original work list, the list of 951 * glob entries, and the default entry. 952 */ 953 free_clist(filelist); 954 free_clist(globlist); 955 free_entry(defconf); 956 957 /* And finally, return a worklist which matches the given files. */ 958 return (cmdlist); 959} 960 961/* 962 * Expand the list of entries with filename patterns, and add all files 963 * which match those glob-entries onto the worklist. 964 */ 965static void 966expand_globs(struct cflist *work_p, struct cflist *glob_p) 967{ 968 int gmatch, gres; 969 size_t i; 970 char *mfname; 971 struct conf_entry *dupent, *ent, *globent; 972 glob_t pglob; 973 struct stat st_fm; 974 975 /* 976 * The worklist contains all fully-specified (non-GLOB) names. 977 * 978 * Now expand the list of filename-pattern (GLOB) entries into 979 * a second list, which (by definition) will only match files 980 * that already exist. Do not add a glob-related entry for any 981 * file which already exists in the fully-specified list. 982 */ 983 STAILQ_FOREACH(globent, glob_p, cf_nextp) { 984 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob); 985 if (gres != 0) { 986 warn("cannot expand pattern (%d): %s", gres, 987 globent->log); 988 continue; 989 } 990 991 if (verbose > 2) 992 printf("\t+ Expanding pattern %s\n", globent->log); 993 for (i = 0; i < pglob.gl_matchc; i++) { 994 mfname = pglob.gl_pathv[i]; 995 996 /* See if this file already has a specific entry. */ 997 gmatch = 0; 998 STAILQ_FOREACH(ent, work_p, cf_nextp) { 999 if (strcmp(mfname, ent->log) == 0) { 1000 gmatch++; 1001 break; 1002 } 1003 } 1004 if (gmatch) 1005 continue; 1006 1007 /* Make sure the named matched is a file. */ 1008 gres = lstat(mfname, &st_fm); 1009 if (gres != 0) { 1010 /* Error on a file that glob() matched?!? */ 1011 warn("Skipping %s - lstat() error", mfname); 1012 continue; 1013 } 1014 if (!S_ISREG(st_fm.st_mode)) { 1015 /* We only rotate files! */ 1016 if (verbose > 2) 1017 printf("\t+ . skipping %s (!file)\n", 1018 mfname); 1019 continue; 1020 } 1021 1022 if (verbose > 2) 1023 printf("\t+ . add file %s\n", mfname); 1024 dupent = init_entry(mfname, globent); 1025 /* This new entry is not a glob! */ 1026 dupent->flags &= ~CE_GLOB; 1027 1028 /* Add to the worklist. */ 1029 STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp); 1030 } 1031 globfree(&pglob); 1032 if (verbose > 2) 1033 printf("\t+ Done with pattern %s\n", globent->log); 1034 } 1035} 1036 1037/* 1038 * Parse a configuration file and update a linked list of all the logs to 1039 * process. 1040 */ 1041static void 1042parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p, 1043 struct conf_entry *defconf_p, struct ilist *inclist) 1044{ 1045 char line[BUFSIZ], *parse, *q; 1046 char *cp, *errline, *group; 1047 struct conf_entry *working; 1048 struct passwd *pwd; 1049 struct group *grp; 1050 glob_t pglob; 1051 int eol, ptm_opts, res, special; 1052 size_t i; 1053 1054 errline = NULL; 1055 while (fgets(line, BUFSIZ, cf)) { 1056 if ((line[0] == '\n') || (line[0] == '#') || 1057 (strlen(line) == 0)) 1058 continue; 1059 if (errline != NULL) 1060 free(errline); 1061 errline = strdup(line); 1062 for (cp = line + 1; *cp != '\0'; cp++) { 1063 if (*cp != '#') 1064 continue; 1065 if (*(cp - 1) == '\\') { 1066 strcpy(cp - 1, cp); 1067 cp--; 1068 continue; 1069 } 1070 *cp = '\0'; 1071 break; 1072 } 1073 1074 q = parse = missing_field(sob(line), errline); 1075 parse = son(line); 1076 if (!*parse) 1077 errx(1, "malformed line (missing fields):\n%s", 1078 errline); 1079 *parse = '\0'; 1080 1081 /* 1082 * Allow people to set debug options via the config file. 1083 * (NOTE: debug options are undocumented, and may disappear 1084 * at any time, etc). 1085 */ 1086 if (strcasecmp(DEBUG_MARKER, q) == 0) { 1087 q = parse = missing_field(sob(parse + 1), errline); 1088 parse = son(parse); 1089 if (!*parse) 1090 warnx("debug line specifies no option:\n%s", 1091 errline); 1092 else { 1093 *parse = '\0'; 1094 parse_doption(q); 1095 } 1096 continue; 1097 } else if (strcasecmp(INCLUDE_MARKER, q) == 0) { 1098 if (verbose) 1099 printf("Found: %s", errline); 1100 q = parse = missing_field(sob(parse + 1), errline); 1101 parse = son(parse); 1102 if (!*parse) { 1103 warnx("include line missing argument:\n%s", 1104 errline); 1105 continue; 1106 } 1107 1108 *parse = '\0'; 1109 1110 if (isglobstr(q)) { 1111 res = glob(q, GLOB_NOCHECK, NULL, &pglob); 1112 if (res != 0) { 1113 warn("cannot expand pattern (%d): %s", 1114 res, q); 1115 continue; 1116 } 1117 1118 if (verbose > 2) 1119 printf("\t+ Expanding pattern %s\n", q); 1120 1121 for (i = 0; i < pglob.gl_matchc; i++) 1122 add_to_queue(pglob.gl_pathv[i], 1123 inclist); 1124 globfree(&pglob); 1125 } else 1126 add_to_queue(q, inclist); 1127 continue; 1128 } 1129 1130 special = 0; 1131 working = init_entry(q, NULL); 1132 if (strcasecmp(DEFAULT_MARKER, q) == 0) { 1133 special = 1; 1134 if (defconf_p != NULL) { 1135 warnx("Ignoring duplicate entry for %s!", q); 1136 free_entry(working); 1137 continue; 1138 } 1139 defconf_p = working; 1140 } 1141 1142 q = parse = missing_field(sob(parse + 1), errline); 1143 parse = son(parse); 1144 if (!*parse) 1145 errx(1, "malformed line (missing fields):\n%s", 1146 errline); 1147 *parse = '\0'; 1148 if ((group = strchr(q, ':')) != NULL || 1149 (group = strrchr(q, '.')) != NULL) { 1150 *group++ = '\0'; 1151 if (*q) { 1152 if (!(isnumberstr(q))) { 1153 if ((pwd = getpwnam(q)) == NULL) 1154 errx(1, 1155 "error in config file; unknown user:\n%s", 1156 errline); 1157 working->uid = pwd->pw_uid; 1158 } else 1159 working->uid = atoi(q); 1160 } else 1161 working->uid = (uid_t)-1; 1162 1163 q = group; 1164 if (*q) { 1165 if (!(isnumberstr(q))) { 1166 if ((grp = getgrnam(q)) == NULL) 1167 errx(1, 1168 "error in config file; unknown group:\n%s", 1169 errline); 1170 working->gid = grp->gr_gid; 1171 } else 1172 working->gid = atoi(q); 1173 } else 1174 working->gid = (gid_t)-1; 1175 1176 q = parse = missing_field(sob(parse + 1), errline); 1177 parse = son(parse); 1178 if (!*parse) 1179 errx(1, "malformed line (missing fields):\n%s", 1180 errline); 1181 *parse = '\0'; 1182 } else { 1183 working->uid = (uid_t)-1; 1184 working->gid = (gid_t)-1; 1185 } 1186 1187 if (!sscanf(q, "%o", &working->permissions)) 1188 errx(1, "error in config file; bad permissions:\n%s", 1189 errline); 1190 1191 q = parse = missing_field(sob(parse + 1), errline); 1192 parse = son(parse); 1193 if (!*parse) 1194 errx(1, "malformed line (missing fields):\n%s", 1195 errline); 1196 *parse = '\0'; 1197 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0) 1198 errx(1, "error in config file; bad value for count of logs to save:\n%s", 1199 errline); 1200 1201 q = parse = missing_field(sob(parse + 1), errline); 1202 parse = son(parse); 1203 if (!*parse) 1204 errx(1, "malformed line (missing fields):\n%s", 1205 errline); 1206 *parse = '\0'; 1207 if (isdigitch(*q)) 1208 working->trsize = atoi(q); 1209 else if (strcmp(q, "*") == 0) 1210 working->trsize = -1; 1211 else { 1212 warnx("Invalid value of '%s' for 'size' in line:\n%s", 1213 q, errline); 1214 working->trsize = -1; 1215 } 1216 1217 working->flags = 0; 1218 working->compress = COMPRESS_NONE; 1219 q = parse = missing_field(sob(parse + 1), errline); 1220 parse = son(parse); 1221 eol = !*parse; 1222 *parse = '\0'; 1223 { 1224 char *ep; 1225 u_long ul; 1226 1227 ul = strtoul(q, &ep, 10); 1228 if (ep == q) 1229 working->hours = 0; 1230 else if (*ep == '*') 1231 working->hours = -1; 1232 else if (ul > INT_MAX) 1233 errx(1, "interval is too large:\n%s", errline); 1234 else 1235 working->hours = ul; 1236 1237 if (*ep == '\0' || strcmp(ep, "*") == 0) 1238 goto no_trimat; 1239 if (*ep != '@' && *ep != '$') 1240 errx(1, "malformed interval/at:\n%s", errline); 1241 1242 working->flags |= CE_TRIMAT; 1243 working->trim_at = ptime_init(NULL); 1244 ptm_opts = PTM_PARSE_ISO8601; 1245 if (*ep == '$') 1246 ptm_opts = PTM_PARSE_DWM; 1247 ptm_opts |= PTM_PARSE_MATCHDOM; 1248 res = ptime_relparse(working->trim_at, ptm_opts, 1249 ptimeget_secs(timenow), ep + 1); 1250 if (res == -2) 1251 errx(1, "nonexistent time for 'at' value:\n%s", 1252 errline); 1253 else if (res < 0) 1254 errx(1, "malformed 'at' value:\n%s", errline); 1255 } 1256no_trimat: 1257 1258 if (eol) 1259 q = NULL; 1260 else { 1261 q = parse = sob(parse + 1); /* Optional field */ 1262 parse = son(parse); 1263 if (!*parse) 1264 eol = 1; 1265 *parse = '\0'; 1266 } 1267 1268 for (; q && *q && !isspacech(*q); q++) { 1269 switch (tolowerch(*q)) { 1270 case 'b': 1271 working->flags |= CE_BINARY; 1272 break; 1273 case 'c': 1274 /* 1275 * XXX - Ick! Ugly! Remove ASAP! 1276 * We want `c' and `C' for "create". But we 1277 * will temporarily treat `c' as `g', because 1278 * FreeBSD releases <= 4.8 have a typo of 1279 * checking ('G' || 'c') for CE_GLOB. 1280 */ 1281 if (*q == 'c') { 1282 warnx("Assuming 'g' for 'c' in flags for line:\n%s", 1283 errline); 1284 warnx("The 'c' flag will eventually mean 'CREATE'"); 1285 working->flags |= CE_GLOB; 1286 break; 1287 } 1288 working->flags |= CE_CREATE; 1289 break; 1290 case 'd': 1291 working->flags |= CE_NODUMP; 1292 break; 1293 case 'g': 1294 working->flags |= CE_GLOB; 1295 break; 1296 case 'j': 1297 working->compress = COMPRESS_BZIP2; 1298 break; 1299 case 'n': 1300 working->flags |= CE_NOSIGNAL; 1301 break; 1302 case 'r': 1303 working->flags |= CE_PID2CMD; 1304 break; 1305 case 'u': 1306 working->flags |= CE_SIGNALGROUP; 1307 break; 1308 case 'w': 1309 /* Depreciated flag - keep for compatibility purposes */ 1310 break; 1311 case 'x': 1312 working->compress = COMPRESS_XZ; 1313 break; 1314 case 'z': 1315 working->compress = COMPRESS_GZIP; 1316 break; 1317 case '-': 1318 break; 1319 case 'f': /* Used by OpenBSD for "CE_FOLLOW" */ 1320 case 'm': /* Used by OpenBSD for "CE_MONITOR" */ 1321 case 'p': /* Used by NetBSD for "CE_PLAIN0" */ 1322 default: 1323 errx(1, "illegal flag in config file -- %c", 1324 *q); 1325 } 1326 } 1327 1328 if (eol) 1329 q = NULL; 1330 else { 1331 q = parse = sob(parse + 1); /* Optional field */ 1332 parse = son(parse); 1333 if (!*parse) 1334 eol = 1; 1335 *parse = '\0'; 1336 } 1337 1338 working->pid_cmd_file = NULL; 1339 if (q && *q) { 1340 if (*q == '/') 1341 working->pid_cmd_file = strdup(q); 1342 else if (isalnum(*q)) 1343 goto got_sig; 1344 else { 1345 errx(1, 1346 "illegal pid file or signal in config file:\n%s", 1347 errline); 1348 } 1349 } 1350 if (eol) 1351 q = NULL; 1352 else { 1353 q = parse = sob(parse + 1); /* Optional field */ 1354 *(parse = son(parse)) = '\0'; 1355 } 1356 1357 working->sig = SIGHUP; 1358 if (q && *q) { 1359got_sig: 1360 working->sig = parse_signal(q); 1361 if (working->sig < 1 || working->sig >= sys_nsig) { 1362 errx(1, 1363 "illegal signal in config file:\n%s", 1364 errline); 1365 } 1366 } 1367 1368 /* 1369 * Finish figuring out what pid-file to use (if any) in 1370 * later processing if this logfile needs to be rotated. 1371 */ 1372 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) { 1373 /* 1374 * This config-entry specified 'n' for nosignal, 1375 * see if it also specified an explicit pid_cmd_file. 1376 * This would be a pretty pointless combination. 1377 */ 1378 if (working->pid_cmd_file != NULL) { 1379 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s", 1380 working->pid_cmd_file, errline); 1381 free(working->pid_cmd_file); 1382 working->pid_cmd_file = NULL; 1383 } 1384 } else if (working->pid_cmd_file == NULL) { 1385 /* 1386 * This entry did not specify the 'n' flag, which 1387 * means it should signal syslogd unless it had 1388 * specified some other pid-file (and obviously the 1389 * syslog pid-file will not be for a process-group). 1390 * Also, we should only try to notify syslog if we 1391 * are root. 1392 */ 1393 if (working->flags & CE_SIGNALGROUP) { 1394 warnx("Ignoring flag 'U' in line:\n%s", 1395 errline); 1396 working->flags &= ~CE_SIGNALGROUP; 1397 } 1398 if (needroot) 1399 working->pid_cmd_file = strdup(path_syslogpid); 1400 } 1401 1402 /* 1403 * Add this entry to the appropriate list of entries, unless 1404 * it was some kind of special entry (eg: <default>). 1405 */ 1406 if (special) { 1407 ; /* Do not add to any list */ 1408 } else if (working->flags & CE_GLOB) { 1409 STAILQ_INSERT_TAIL(glob_p, working, cf_nextp); 1410 } else { 1411 STAILQ_INSERT_TAIL(work_p, working, cf_nextp); 1412 } 1413 } 1414 if (errline != NULL) 1415 free(errline); 1416} 1417 1418static char * 1419missing_field(char *p, char *errline) 1420{ 1421 1422 if (!p || !*p) 1423 errx(1, "missing field in config file:\n%s", errline); 1424 return (p); 1425} 1426 1427/* 1428 * In our sort we return it in the reverse of what qsort normally 1429 * would do, as we want the newest files first. If we have two 1430 * entries with the same time we don't really care about order. 1431 * 1432 * Support function for qsort() in delete_oldest_timelog(). 1433 */ 1434static int 1435oldlog_entry_compare(const void *a, const void *b) 1436{ 1437 const struct oldlog_entry *ola = a, *olb = b; 1438 1439 if (ola->t > olb->t) 1440 return (-1); 1441 else if (ola->t < olb->t) 1442 return (1); 1443 else 1444 return (0); 1445} 1446 1447/* 1448 * Check whether the file corresponding to dp is an archive of the logfile 1449 * logfname, based on the timefnamefmt format string. Return true and fill out 1450 * tm if this is the case; otherwise return false. 1451 */ 1452static int 1453validate_old_timelog(int fd, const struct dirent *dp, const char *logfname, 1454 struct tm *tm) 1455{ 1456 struct stat sb; 1457 size_t logfname_len; 1458 char *s; 1459 int c; 1460 1461 logfname_len = strlen(logfname); 1462 1463 if (dp->d_type != DT_REG) { 1464 /* 1465 * Some filesystems (e.g. NFS) don't fill out the d_type field 1466 * and leave it set to DT_UNKNOWN; in this case we must obtain 1467 * the file type ourselves. 1468 */ 1469 if (dp->d_type != DT_UNKNOWN || 1470 fstatat(fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) != 0 || 1471 !S_ISREG(sb.st_mode)) 1472 return (0); 1473 } 1474 /* Ignore everything but files with our logfile prefix. */ 1475 if (strncmp(dp->d_name, logfname, logfname_len) != 0) 1476 return (0); 1477 /* Ignore the actual non-rotated logfile. */ 1478 if (dp->d_namlen == logfname_len) 1479 return (0); 1480 1481 /* 1482 * Make sure we created have found a logfile, so the 1483 * postfix is valid, IE format is: '.<time>(.[bgx]z)?'. 1484 */ 1485 if (dp->d_name[logfname_len] != '.') { 1486 if (verbose) 1487 printf("Ignoring %s which has unexpected " 1488 "extension '%s'\n", dp->d_name, 1489 &dp->d_name[logfname_len]); 1490 return (0); 1491 } 1492 memset(tm, 0, sizeof(*tm)); 1493 if ((s = strptime(&dp->d_name[logfname_len + 1], 1494 timefnamefmt, tm)) == NULL) { 1495 /* 1496 * We could special case "old" sequentially named logfiles here, 1497 * but we do not as that would require special handling to 1498 * decide which one was the oldest compared to "new" time based 1499 * logfiles. 1500 */ 1501 if (verbose) 1502 printf("Ignoring %s which does not " 1503 "match time format\n", dp->d_name); 1504 return (0); 1505 } 1506 1507 for (c = 0; c < COMPRESS_TYPES; c++) 1508 if (strcmp(s, compress_type[c].suffix) == 0) 1509 /* We're done. */ 1510 return (1); 1511 1512 if (verbose) 1513 printf("Ignoring %s which has unexpected extension '%s'\n", 1514 dp->d_name, s); 1515 1516 return (0); 1517} 1518 1519/* 1520 * Delete the oldest logfiles, when using time based filenames. 1521 */ 1522static void 1523delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir) 1524{ 1525 char *logfname, *s, *dir, errbuf[80]; 1526 int dir_fd, i, logcnt, max_logcnt; 1527 struct oldlog_entry *oldlogs; 1528 struct dirent *dp; 1529 const char *cdir; 1530 struct tm tm; 1531 DIR *dirp; 1532 1533 oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry)); 1534 max_logcnt = MAX_OLDLOGS; 1535 logcnt = 0; 1536 1537 if (archive_dir != NULL && archive_dir[0] != '\0') 1538 cdir = archive_dir; 1539 else 1540 if ((cdir = dirname(ent->log)) == NULL) 1541 err(1, "dirname()"); 1542 if ((dir = strdup(cdir)) == NULL) 1543 err(1, "strdup()"); 1544 1545 if ((s = basename(ent->log)) == NULL) 1546 err(1, "basename()"); 1547 if ((logfname = strdup(s)) == NULL) 1548 err(1, "strdup()"); 1549 if (strcmp(logfname, "/") == 0) 1550 errx(1, "Invalid log filename - became '/'"); 1551 1552 if (verbose > 2) 1553 printf("Searching for old logs in %s\n", dir); 1554 1555 /* First we create a 'list' of all archived logfiles */ 1556 if ((dirp = opendir(dir)) == NULL) 1557 err(1, "Cannot open log directory '%s'", dir); 1558 dir_fd = dirfd(dirp); 1559 while ((dp = readdir(dirp)) != NULL) { 1560 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0) 1561 continue; 1562 1563 /* 1564 * We should now have old an old rotated logfile, so 1565 * add it to the 'list'. 1566 */ 1567 if ((oldlogs[logcnt].t = timegm(&tm)) == -1) 1568 err(1, "Could not convert time string to time value"); 1569 if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL) 1570 err(1, "strdup()"); 1571 logcnt++; 1572 1573 /* 1574 * It is very unlikely we ever run out of space in the 1575 * logfile array from the default size, but lets 1576 * handle it anyway... 1577 */ 1578 if (logcnt >= max_logcnt) { 1579 max_logcnt *= 4; 1580 /* Detect integer overflow */ 1581 if (max_logcnt < logcnt) 1582 errx(1, "Too many old logfiles found"); 1583 oldlogs = realloc(oldlogs, 1584 max_logcnt * sizeof(struct oldlog_entry)); 1585 if (oldlogs == NULL) 1586 err(1, "realloc()"); 1587 } 1588 } 1589 1590 /* Second, if needed we delete oldest archived logfiles */ 1591 if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) { 1592 oldlogs = realloc(oldlogs, logcnt * 1593 sizeof(struct oldlog_entry)); 1594 if (oldlogs == NULL) 1595 err(1, "realloc()"); 1596 1597 /* 1598 * We now sort the logs in the order of newest to 1599 * oldest. That way we can simply skip over the 1600 * number of records we want to keep. 1601 */ 1602 qsort(oldlogs, logcnt, sizeof(struct oldlog_entry), 1603 oldlog_entry_compare); 1604 for (i = ent->numlogs - 1; i < logcnt; i++) { 1605 if (noaction) 1606 printf("\trm -f %s/%s\n", dir, 1607 oldlogs[i].fname); 1608 else if (unlinkat(dir_fd, oldlogs[i].fname, 0) != 0) { 1609 snprintf(errbuf, sizeof(errbuf), 1610 "Could not delete old logfile '%s'", 1611 oldlogs[i].fname); 1612 perror(errbuf); 1613 } 1614 } 1615 } else if (verbose > 1) 1616 printf("No old logs to delete for logfile %s\n", ent->log); 1617 1618 /* Third, cleanup */ 1619 closedir(dirp); 1620 for (i = 0; i < logcnt; i++) { 1621 assert(oldlogs[i].fname != NULL); 1622 free(oldlogs[i].fname); 1623 } 1624 free(oldlogs); 1625 free(logfname); 1626 free(dir); 1627} 1628 1629/* 1630 * Generate a log filename, when using classic filenames. 1631 */ 1632static void 1633gen_classiclog_fname(char *fname, size_t fname_sz, const char *archive_dir, 1634 const char *namepart, int numlogs_c) 1635{ 1636 1637 if (archive_dir[0] != '\0') 1638 (void) snprintf(fname, fname_sz, "%s/%s.%d", archive_dir, 1639 namepart, numlogs_c); 1640 else 1641 (void) snprintf(fname, fname_sz, "%s.%d", namepart, numlogs_c); 1642} 1643 1644/* 1645 * Delete a rotated logfile, when using classic filenames. 1646 */ 1647static void 1648delete_classiclog(const char *archive_dir, const char *namepart, int numlog_c) 1649{ 1650 char file1[MAXPATHLEN], zfile1[MAXPATHLEN]; 1651 int c; 1652 1653 gen_classiclog_fname(file1, sizeof(file1), archive_dir, namepart, 1654 numlog_c); 1655 1656 for (c = 0; c < COMPRESS_TYPES; c++) { 1657 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1, 1658 compress_type[c].suffix); 1659 if (noaction) 1660 printf("\trm -f %s\n", zfile1); 1661 else 1662 (void) unlink(zfile1); 1663 } 1664} 1665 1666/* 1667 * Only add to the queue if the file hasn't already been added. This is 1668 * done to prevent circular include loops. 1669 */ 1670static void 1671add_to_queue(const char *fname, struct ilist *inclist) 1672{ 1673 struct include_entry *inc; 1674 1675 STAILQ_FOREACH(inc, inclist, inc_nextp) { 1676 if (strcmp(fname, inc->file) == 0) { 1677 warnx("duplicate include detected: %s", fname); 1678 return; 1679 } 1680 } 1681 1682 inc = malloc(sizeof(struct include_entry)); 1683 if (inc == NULL) 1684 err(1, "malloc of inc"); 1685 inc->file = strdup(fname); 1686 1687 if (verbose > 2) 1688 printf("\t+ Adding %s to the processing queue.\n", fname); 1689 1690 STAILQ_INSERT_TAIL(inclist, inc, inc_nextp); 1691} 1692 1693/* 1694 * Search for logfile and return its compression suffix (if supported) 1695 * The suffix detection is first-match in the order of compress_types 1696 * 1697 * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE) 1698 * a zero-length string is returned 1699 */ 1700static const char * 1701get_logfile_suffix(const char *logfile) 1702{ 1703 struct stat st; 1704 char zfile[MAXPATHLEN]; 1705 int c; 1706 1707 for (c = 0; c < COMPRESS_TYPES; c++) { 1708 (void) strlcpy(zfile, logfile, MAXPATHLEN); 1709 (void) strlcat(zfile, compress_type[c].suffix, MAXPATHLEN); 1710 if (lstat(zfile, &st) == 0) 1711 return (compress_type[c].suffix); 1712 } 1713 return (NULL); 1714} 1715 1716static fk_entry 1717do_rotate(const struct conf_entry *ent) 1718{ 1719 char dirpart[MAXPATHLEN], namepart[MAXPATHLEN]; 1720 char file1[MAXPATHLEN], file2[MAXPATHLEN]; 1721 char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN]; 1722 const char *logfile_suffix; 1723 char datetimestr[30]; 1724 int flags, numlogs_c; 1725 fk_entry free_or_keep; 1726 struct sigwork_entry *swork; 1727 struct stat st; 1728 struct tm tm; 1729 time_t now; 1730 1731 flags = ent->flags; 1732 free_or_keep = FREE_ENT; 1733 1734 if (archtodir) { 1735 char *p; 1736 1737 /* build complete name of archive directory into dirpart */ 1738 if (*archdirname == '/') { /* absolute */ 1739 strlcpy(dirpart, archdirname, sizeof(dirpart)); 1740 } else { /* relative */ 1741 /* get directory part of logfile */ 1742 strlcpy(dirpart, ent->log, sizeof(dirpart)); 1743 if ((p = strrchr(dirpart, '/')) == NULL) 1744 dirpart[0] = '\0'; 1745 else 1746 *(p + 1) = '\0'; 1747 strlcat(dirpart, archdirname, sizeof(dirpart)); 1748 } 1749 1750 /* check if archive directory exists, if not, create it */ 1751 if (lstat(dirpart, &st)) 1752 createdir(ent, dirpart); 1753 1754 /* get filename part of logfile */ 1755 if ((p = strrchr(ent->log, '/')) == NULL) 1756 strlcpy(namepart, ent->log, sizeof(namepart)); 1757 else 1758 strlcpy(namepart, p + 1, sizeof(namepart)); 1759 } else { 1760 /* 1761 * Tell utility functions we are not using an archive 1762 * dir. 1763 */ 1764 dirpart[0] = '\0'; 1765 strlcpy(namepart, ent->log, sizeof(namepart)); 1766 } 1767 1768 /* Delete old logs */ 1769 if (timefnamefmt != NULL) 1770 delete_oldest_timelog(ent, dirpart); 1771 else { 1772 /* 1773 * Handle cleaning up after legacy newsyslog where we 1774 * kept ent->numlogs + 1 files. This code can go away 1775 * at some point in the future. 1776 */ 1777 delete_classiclog(dirpart, namepart, ent->numlogs); 1778 1779 if (ent->numlogs > 0) 1780 delete_classiclog(dirpart, namepart, ent->numlogs - 1); 1781 1782 } 1783 1784 if (timefnamefmt != NULL) { 1785 /* If time functions fails we can't really do any sensible */ 1786 if (time(&now) == (time_t)-1 || 1787 localtime_r(&now, &tm) == NULL) 1788 bzero(&tm, sizeof(tm)); 1789 1790 strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm); 1791 if (archtodir) 1792 (void) snprintf(file1, sizeof(file1), "%s/%s.%s", 1793 dirpart, namepart, datetimestr); 1794 else 1795 (void) snprintf(file1, sizeof(file1), "%s.%s", 1796 ent->log, datetimestr); 1797 1798 /* Don't run the code to move down logs */ 1799 numlogs_c = -1; 1800 } else { 1801 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart, 1802 ent->numlogs - 1); 1803 numlogs_c = ent->numlogs - 2; /* copy for countdown */ 1804 } 1805 1806 /* Move down log files */ 1807 for (; numlogs_c >= 0; numlogs_c--) { 1808 (void) strlcpy(file2, file1, sizeof(file2)); 1809 1810 gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart, 1811 numlogs_c); 1812 1813 logfile_suffix = get_logfile_suffix(file1); 1814 if (logfile_suffix == NULL) 1815 continue; 1816 (void) strlcpy(zfile1, file1, MAXPATHLEN); 1817 (void) strlcpy(zfile2, file2, MAXPATHLEN); 1818 (void) strlcat(zfile1, logfile_suffix, MAXPATHLEN); 1819 (void) strlcat(zfile2, logfile_suffix, MAXPATHLEN); 1820 1821 if (noaction) 1822 printf("\tmv %s %s\n", zfile1, zfile2); 1823 else { 1824 /* XXX - Ought to be checking for failure! */ 1825 (void)rename(zfile1, zfile2); 1826 } 1827 change_attrs(zfile2, ent); 1828 } 1829 1830 if (ent->numlogs > 0) { 1831 if (noaction) { 1832 /* 1833 * Note that savelog() may succeed with using link() 1834 * for the archtodir case, but there is no good way 1835 * of knowing if it will when doing "noaction", so 1836 * here we claim that it will have to do a copy... 1837 */ 1838 if (archtodir) 1839 printf("\tcp %s %s\n", ent->log, file1); 1840 else 1841 printf("\tln %s %s\n", ent->log, file1); 1842 printf("\ttouch %s\t\t" 1843 "# Update mtime for 'when'-interval processing\n", 1844 file1); 1845 } else { 1846 if (!(flags & CE_BINARY)) { 1847 /* Report the trimming to the old log */ 1848 log_trim(ent->log, ent); 1849 } 1850 savelog(ent->log, file1); 1851 /* 1852 * Interval-based rotations are done using the mtime of 1853 * the most recently archived log, so make sure it gets 1854 * updated during a rotation. 1855 */ 1856 utimes(file1, NULL); 1857 } 1858 change_attrs(file1, ent); 1859 } 1860 1861 /* Create the new log file and move it into place */ 1862 if (noaction) 1863 printf("Start new log...\n"); 1864 createlog(ent); 1865 1866 /* 1867 * Save all signalling and file-compression to be done after log 1868 * files from all entries have been rotated. This way any one 1869 * process will not be sent the same signal multiple times when 1870 * multiple log files had to be rotated. 1871 */ 1872 swork = NULL; 1873 if (ent->pid_cmd_file != NULL) 1874 swork = save_sigwork(ent); 1875 if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) { 1876 /* 1877 * The zipwork_entry will include a pointer to this 1878 * conf_entry, so the conf_entry should not be freed. 1879 */ 1880 free_or_keep = KEEP_ENT; 1881 save_zipwork(ent, swork, ent->fsize, file1); 1882 } 1883 1884 return (free_or_keep); 1885} 1886 1887static void 1888do_sigwork(struct sigwork_entry *swork) 1889{ 1890 struct sigwork_entry *nextsig; 1891 int kres, secs; 1892 char *tmp; 1893 1894 if (swork->sw_runcmd == 0 && (!(swork->sw_pidok) || swork->sw_pid == 0)) 1895 return; /* no work to do... */ 1896 1897 /* 1898 * If nosignal (-s) was specified, then do not signal any process. 1899 * Note that a nosignal request triggers a warning message if the 1900 * rotated logfile needs to be compressed, *unless* -R was also 1901 * specified. We assume that an `-sR' request came from a process 1902 * which writes to the logfile, and as such, we assume that process 1903 * has already made sure the logfile is not presently in use. This 1904 * just sets swork->sw_pidok to a special value, and do_zipwork 1905 * will print any necessary warning(s). 1906 */ 1907 if (nosignal) { 1908 if (!rotatereq) 1909 swork->sw_pidok = -1; 1910 return; 1911 } 1912 1913 /* 1914 * Compute the pause between consecutive signals. Use a longer 1915 * sleep time if we will be sending two signals to the same 1916 * daemon or process-group. 1917 */ 1918 secs = 0; 1919 nextsig = SLIST_NEXT(swork, sw_nextp); 1920 if (nextsig != NULL) { 1921 if (swork->sw_pid == nextsig->sw_pid) 1922 secs = 10; 1923 else 1924 secs = 1; 1925 } 1926 1927 if (noaction) { 1928 if (swork->sw_runcmd) 1929 printf("\tsh -c '%s %d'\n", swork->sw_fname, 1930 swork->sw_signum); 1931 else { 1932 printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum, 1933 (int)swork->sw_pid, swork->sw_fname); 1934 if (secs > 0) 1935 printf("\tsleep %d\n", secs); 1936 } 1937 return; 1938 } 1939 1940 if (swork->sw_runcmd) { 1941 asprintf(&tmp, "%s %d", swork->sw_fname, swork->sw_signum); 1942 if (tmp == NULL) { 1943 warn("can't allocate memory to run %s", 1944 swork->sw_fname); 1945 return; 1946 } 1947 if (verbose) 1948 printf("Run command: %s\n", tmp); 1949 kres = system(tmp); 1950 if (kres) { 1951 warnx("%s: returned non-zero exit code: %d", 1952 tmp, kres); 1953 } 1954 free(tmp); 1955 return; 1956 } 1957 1958 kres = kill(swork->sw_pid, swork->sw_signum); 1959 if (kres != 0) { 1960 /* 1961 * Assume that "no such process" (ESRCH) is something 1962 * to warn about, but is not an error. Presumably the 1963 * process which writes to the rotated log file(s) is 1964 * gone, in which case we should have no problem with 1965 * compressing the rotated log file(s). 1966 */ 1967 if (errno != ESRCH) 1968 swork->sw_pidok = 0; 1969 warn("can't notify %s, pid %d = %s", swork->sw_pidtype, 1970 (int)swork->sw_pid, swork->sw_fname); 1971 } else { 1972 if (verbose) 1973 printf("Notified %s pid %d = %s\n", swork->sw_pidtype, 1974 (int)swork->sw_pid, swork->sw_fname); 1975 if (secs > 0) { 1976 if (verbose) 1977 printf("Pause %d second(s) between signals\n", 1978 secs); 1979 sleep(secs); 1980 } 1981 } 1982} 1983 1984static void 1985do_zipwork(struct zipwork_entry *zwork) 1986{ 1987 const char *pgm_name, *pgm_path; 1988 int errsav, fcount, zstatus; 1989 pid_t pidzip, wpid; 1990 char zresult[MAXPATHLEN]; 1991 int c; 1992 1993 assert(zwork != NULL); 1994 pgm_path = NULL; 1995 strlcpy(zresult, zwork->zw_fname, sizeof(zresult)); 1996 if (zwork->zw_conf != NULL && 1997 zwork->zw_conf->compress > COMPRESS_NONE) 1998 for (c = 1; c < COMPRESS_TYPES; c++) { 1999 if (zwork->zw_conf->compress == c) { 2000 pgm_path = compress_type[c].path; 2001 (void) strlcat(zresult, 2002 compress_type[c].suffix, sizeof(zresult)); 2003 break; 2004 } 2005 } 2006 if (pgm_path == NULL) { 2007 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname); 2008 return; 2009 } 2010 pgm_name = strrchr(pgm_path, '/'); 2011 if (pgm_name == NULL) 2012 pgm_name = pgm_path; 2013 else 2014 pgm_name++; 2015 2016 if (zwork->zw_swork != NULL && zwork->zw_swork->sw_runcmd == 0 && 2017 zwork->zw_swork->sw_pidok <= 0) { 2018 warnx( 2019 "log %s not compressed because daemon(s) not notified", 2020 zwork->zw_fname); 2021 change_attrs(zwork->zw_fname, zwork->zw_conf); 2022 return; 2023 } 2024 2025 if (noaction) { 2026 printf("\t%s %s\n", pgm_name, zwork->zw_fname); 2027 change_attrs(zresult, zwork->zw_conf); 2028 return; 2029 } 2030 2031 fcount = 1; 2032 pidzip = fork(); 2033 while (pidzip < 0) { 2034 /* 2035 * The fork failed. If the failure was due to a temporary 2036 * problem, then wait a short time and try it again. 2037 */ 2038 errsav = errno; 2039 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname); 2040 if (errsav != EAGAIN || fcount > 5) 2041 errx(1, "Exiting..."); 2042 sleep(fcount * 12); 2043 fcount++; 2044 pidzip = fork(); 2045 } 2046 if (!pidzip) { 2047 /* The child process executes the compression command */ 2048 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0); 2049 err(1, "execl(`%s -f %s')", pgm_path, zwork->zw_fname); 2050 } 2051 2052 wpid = waitpid(pidzip, &zstatus, 0); 2053 if (wpid == -1) { 2054 /* XXX - should this be a fatal error? */ 2055 warn("%s: waitpid(%d)", pgm_path, pidzip); 2056 return; 2057 } 2058 if (!WIFEXITED(zstatus)) { 2059 warnx("`%s -f %s' did not terminate normally", pgm_name, 2060 zwork->zw_fname); 2061 return; 2062 } 2063 if (WEXITSTATUS(zstatus)) { 2064 warnx("`%s -f %s' terminated with a non-zero status (%d)", 2065 pgm_name, zwork->zw_fname, WEXITSTATUS(zstatus)); 2066 return; 2067 } 2068 2069 /* Compression was successful, set file attributes on the result. */ 2070 change_attrs(zresult, zwork->zw_conf); 2071} 2072 2073/* 2074 * Save information on any process we need to signal. Any single 2075 * process may need to be sent different signal-values for different 2076 * log files, but usually a single signal-value will cause the process 2077 * to close and re-open all of it's log files. 2078 */ 2079static struct sigwork_entry * 2080save_sigwork(const struct conf_entry *ent) 2081{ 2082 struct sigwork_entry *sprev, *stmp; 2083 int ndiff; 2084 size_t tmpsiz; 2085 2086 sprev = NULL; 2087 ndiff = 1; 2088 SLIST_FOREACH(stmp, &swhead, sw_nextp) { 2089 ndiff = strcmp(ent->pid_cmd_file, stmp->sw_fname); 2090 if (ndiff > 0) 2091 break; 2092 if (ndiff == 0) { 2093 if (ent->sig == stmp->sw_signum) 2094 break; 2095 if (ent->sig > stmp->sw_signum) { 2096 ndiff = 1; 2097 break; 2098 } 2099 } 2100 sprev = stmp; 2101 } 2102 if (stmp != NULL && ndiff == 0) 2103 return (stmp); 2104 2105 tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_cmd_file) + 1; 2106 stmp = malloc(tmpsiz); 2107 2108 stmp->sw_runcmd = 0; 2109 /* If this is a command to run we just set the flag and run command */ 2110 if (ent->flags & CE_PID2CMD) { 2111 stmp->sw_pid = -1; 2112 stmp->sw_pidok = 0; 2113 stmp->sw_runcmd = 1; 2114 } else { 2115 set_swpid(stmp, ent); 2116 } 2117 stmp->sw_signum = ent->sig; 2118 strcpy(stmp->sw_fname, ent->pid_cmd_file); 2119 if (sprev == NULL) 2120 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp); 2121 else 2122 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp); 2123 return (stmp); 2124} 2125 2126/* 2127 * Save information on any file we need to compress. We may see the same 2128 * file multiple times, so check the full list to avoid duplicates. The 2129 * list itself is sorted smallest-to-largest, because that's the order we 2130 * want to compress the files. If the partition is very low on disk space, 2131 * then the smallest files are the most likely to compress, and compressing 2132 * them first will free up more space for the larger files. 2133 */ 2134static struct zipwork_entry * 2135save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork, 2136 int zsize, const char *zipfname) 2137{ 2138 struct zipwork_entry *zprev, *ztmp; 2139 int ndiff; 2140 size_t tmpsiz; 2141 2142 /* Compute the size if the caller did not know it. */ 2143 if (zsize < 0) 2144 zsize = sizefile(zipfname); 2145 2146 zprev = NULL; 2147 ndiff = 1; 2148 SLIST_FOREACH(ztmp, &zwhead, zw_nextp) { 2149 ndiff = strcmp(zipfname, ztmp->zw_fname); 2150 if (ndiff == 0) 2151 break; 2152 if (zsize > ztmp->zw_fsize) 2153 zprev = ztmp; 2154 } 2155 if (ztmp != NULL && ndiff == 0) 2156 return (ztmp); 2157 2158 tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1; 2159 ztmp = malloc(tmpsiz); 2160 ztmp->zw_conf = ent; 2161 ztmp->zw_swork = swork; 2162 ztmp->zw_fsize = zsize; 2163 strcpy(ztmp->zw_fname, zipfname); 2164 if (zprev == NULL) 2165 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp); 2166 else 2167 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp); 2168 return (ztmp); 2169} 2170 2171/* Send a signal to the pid specified by pidfile */ 2172static void 2173set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent) 2174{ 2175 FILE *f; 2176 long minok, maxok, rval; 2177 char *endp, *linep, line[BUFSIZ]; 2178 2179 minok = MIN_PID; 2180 maxok = MAX_PID; 2181 swork->sw_pidok = 0; 2182 swork->sw_pid = 0; 2183 swork->sw_pidtype = "daemon"; 2184 if (ent->flags & CE_SIGNALGROUP) { 2185 /* 2186 * If we are expected to signal a process-group when 2187 * rotating this logfile, then the value read in should 2188 * be the negative of a valid process ID. 2189 */ 2190 minok = -MAX_PID; 2191 maxok = -MIN_PID; 2192 swork->sw_pidtype = "process-group"; 2193 } 2194 2195 f = fopen(ent->pid_cmd_file, "r"); 2196 if (f == NULL) { 2197 if (errno == ENOENT && enforcepid == 0) { 2198 /* 2199 * Warn if the PID file doesn't exist, but do 2200 * not consider it an error. Most likely it 2201 * means the process has been terminated, 2202 * so it should be safe to rotate any log 2203 * files that the process would have been using. 2204 */ 2205 swork->sw_pidok = 1; 2206 warnx("pid file doesn't exist: %s", ent->pid_cmd_file); 2207 } else 2208 warn("can't open pid file: %s", ent->pid_cmd_file); 2209 return; 2210 } 2211 2212 if (fgets(line, BUFSIZ, f) == NULL) { 2213 /* 2214 * Warn if the PID file is empty, but do not consider 2215 * it an error. Most likely it means the process has 2216 * has terminated, so it should be safe to rotate any 2217 * log files that the process would have been using. 2218 */ 2219 if (feof(f) && enforcepid == 0) { 2220 swork->sw_pidok = 1; 2221 warnx("pid/cmd file is empty: %s", ent->pid_cmd_file); 2222 } else 2223 warn("can't read from pid file: %s", ent->pid_cmd_file); 2224 (void)fclose(f); 2225 return; 2226 } 2227 (void)fclose(f); 2228 2229 errno = 0; 2230 linep = line; 2231 while (*linep == ' ') 2232 linep++; 2233 rval = strtol(linep, &endp, 10); 2234 if (*endp != '\0' && !isspacech(*endp)) { 2235 warnx("pid file does not start with a valid number: %s", 2236 ent->pid_cmd_file); 2237 } else if (rval < minok || rval > maxok) { 2238 warnx("bad value '%ld' for process number in %s", 2239 rval, ent->pid_cmd_file); 2240 if (verbose) 2241 warnx("\t(expecting value between %ld and %ld)", 2242 minok, maxok); 2243 } else { 2244 swork->sw_pidok = 1; 2245 swork->sw_pid = rval; 2246 } 2247 2248 return; 2249} 2250 2251/* Log the fact that the logs were turned over */ 2252static int 2253log_trim(const char *logname, const struct conf_entry *log_ent) 2254{ 2255 FILE *f; 2256 const char *xtra; 2257 2258 if ((f = fopen(logname, "a")) == NULL) 2259 return (-1); 2260 xtra = ""; 2261 if (log_ent->def_cfg) 2262 xtra = " using <default> rule"; 2263 if (log_ent->firstcreate) 2264 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n", 2265 daytime, hostname, (int) getpid(), xtra); 2266 else if (log_ent->r_reason != NULL) 2267 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n", 2268 daytime, hostname, (int) getpid(), log_ent->r_reason, xtra); 2269 else 2270 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n", 2271 daytime, hostname, (int) getpid(), xtra); 2272 if (fclose(f) == EOF) 2273 err(1, "log_trim: fclose"); 2274 return (0); 2275} 2276 2277/* Return size in kilobytes of a file */ 2278static int 2279sizefile(const char *file) 2280{ 2281 struct stat sb; 2282 2283 if (stat(file, &sb) < 0) 2284 return (-1); 2285 return (kbytes(sb.st_size)); 2286} 2287 2288/* 2289 * Return the mtime of the most recent archive of the logfile, using timestamp 2290 * based filenames. 2291 */ 2292static time_t 2293mtime_old_timelog(const char *file) 2294{ 2295 struct stat sb; 2296 struct tm tm; 2297 int dir_fd; 2298 time_t t; 2299 struct dirent *dp; 2300 DIR *dirp; 2301 char *s, *logfname, *dir; 2302 2303 t = -1; 2304 2305 if ((dir = dirname(file)) == NULL) { 2306 warn("dirname() of '%s'", file); 2307 return (t); 2308 } 2309 if ((s = basename(file)) == NULL) { 2310 warn("basename() of '%s'", file); 2311 return (t); 2312 } else if (s[0] == '/') { 2313 warnx("Invalid log filename '%s'", s); 2314 return (t); 2315 } else if ((logfname = strdup(s)) == NULL) 2316 err(1, "strdup()"); 2317 2318 if ((dirp = opendir(dir)) == NULL) { 2319 warn("Cannot open log directory '%s'", dir); 2320 return (t); 2321 } 2322 dir_fd = dirfd(dirp); 2323 /* Open the archive dir and find the most recent archive of logfname. */ 2324 while ((dp = readdir(dirp)) != NULL) { 2325 if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0) 2326 continue; 2327 2328 if (fstatat(dir_fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) == -1) { 2329 warn("Cannot stat '%s'", file); 2330 continue; 2331 } 2332 if (t < sb.st_mtime) 2333 t = sb.st_mtime; 2334 } 2335 closedir(dirp); 2336 2337 return (t); 2338} 2339 2340/* Return the age in hours of the most recent archive of the logfile. */ 2341static int 2342age_old_log(const char *file) 2343{ 2344 struct stat sb; 2345 const char *logfile_suffix; 2346 char tmp[MAXPATHLEN + sizeof(".0") + COMPRESS_SUFFIX_MAXLEN + 1]; 2347 time_t mtime; 2348 2349 if (archtodir) { 2350 char *p; 2351 2352 /* build name of archive directory into tmp */ 2353 if (*archdirname == '/') { /* absolute */ 2354 strlcpy(tmp, archdirname, sizeof(tmp)); 2355 } else { /* relative */ 2356 /* get directory part of logfile */ 2357 strlcpy(tmp, file, sizeof(tmp)); 2358 if ((p = strrchr(tmp, '/')) == NULL) 2359 tmp[0] = '\0'; 2360 else 2361 *(p + 1) = '\0'; 2362 strlcat(tmp, archdirname, sizeof(tmp)); 2363 } 2364 2365 strlcat(tmp, "/", sizeof(tmp)); 2366 2367 /* get filename part of logfile */ 2368 if ((p = strrchr(file, '/')) == NULL) 2369 strlcat(tmp, file, sizeof(tmp)); 2370 else 2371 strlcat(tmp, p + 1, sizeof(tmp)); 2372 } else { 2373 (void) strlcpy(tmp, file, sizeof(tmp)); 2374 } 2375 2376 if (timefnamefmt != NULL) { 2377 mtime = mtime_old_timelog(tmp); 2378 if (mtime == -1) 2379 return (-1); 2380 } else { 2381 strlcat(tmp, ".0", sizeof(tmp)); 2382 logfile_suffix = get_logfile_suffix(tmp); 2383 if (logfile_suffix == NULL) 2384 return (-1); 2385 (void) strlcat(tmp, logfile_suffix, sizeof(tmp)); 2386 if (stat(tmp, &sb) < 0) 2387 return (-1); 2388 mtime = sb.st_mtime; 2389 } 2390 2391 return ((int)(ptimeget_secs(timenow) - mtime + 1800) / 3600); 2392} 2393 2394/* Skip Over Blanks */ 2395static char * 2396sob(char *p) 2397{ 2398 while (p && *p && isspace(*p)) 2399 p++; 2400 return (p); 2401} 2402 2403/* Skip Over Non-Blanks */ 2404static char * 2405son(char *p) 2406{ 2407 while (p && *p && !isspace(*p)) 2408 p++; 2409 return (p); 2410} 2411 2412/* Check if string is actually a number */ 2413static int 2414isnumberstr(const char *string) 2415{ 2416 while (*string) { 2417 if (!isdigitch(*string++)) 2418 return (0); 2419 } 2420 return (1); 2421} 2422 2423/* Check if string contains a glob */ 2424static int 2425isglobstr(const char *string) 2426{ 2427 char chr; 2428 2429 while ((chr = *string++)) { 2430 if (chr == '*' || chr == '?' || chr == '[') 2431 return (1); 2432 } 2433 return (0); 2434} 2435 2436/* 2437 * Save the active log file under a new name. A link to the new name 2438 * is the quick-and-easy way to do this. If that fails (which it will 2439 * if the destination is on another partition), then make a copy of 2440 * the file to the new location. 2441 */ 2442static void 2443savelog(char *from, char *to) 2444{ 2445 FILE *src, *dst; 2446 int c, res; 2447 2448 res = link(from, to); 2449 if (res == 0) 2450 return; 2451 2452 if ((src = fopen(from, "r")) == NULL) 2453 err(1, "can't fopen %s for reading", from); 2454 if ((dst = fopen(to, "w")) == NULL) 2455 err(1, "can't fopen %s for writing", to); 2456 2457 while ((c = getc(src)) != EOF) { 2458 if ((putc(c, dst)) == EOF) 2459 err(1, "error writing to %s", to); 2460 } 2461 2462 if (ferror(src)) 2463 err(1, "error reading from %s", from); 2464 if ((fclose(src)) != 0) 2465 err(1, "can't fclose %s", to); 2466 if ((fclose(dst)) != 0) 2467 err(1, "can't fclose %s", from); 2468} 2469 2470/* create one or more directory components of a path */ 2471static void 2472createdir(const struct conf_entry *ent, char *dirpart) 2473{ 2474 int res; 2475 char *s, *d; 2476 char mkdirpath[MAXPATHLEN]; 2477 struct stat st; 2478 2479 s = dirpart; 2480 d = mkdirpath; 2481 2482 for (;;) { 2483 *d++ = *s++; 2484 if (*s != '/' && *s != '\0') 2485 continue; 2486 *d = '\0'; 2487 res = lstat(mkdirpath, &st); 2488 if (res != 0) { 2489 if (noaction) { 2490 printf("\tmkdir %s\n", mkdirpath); 2491 } else { 2492 res = mkdir(mkdirpath, 0755); 2493 if (res != 0) 2494 err(1, "Error on mkdir(\"%s\") for -a", 2495 mkdirpath); 2496 } 2497 } 2498 if (*s == '\0') 2499 break; 2500 } 2501 if (verbose) { 2502 if (ent->firstcreate) 2503 printf("Created directory '%s' for new %s\n", 2504 dirpart, ent->log); 2505 else 2506 printf("Created directory '%s' for -a\n", dirpart); 2507 } 2508} 2509 2510/* 2511 * Create a new log file, destroying any currently-existing version 2512 * of the log file in the process. If the caller wants a backup copy 2513 * of the file to exist, they should call 'link(logfile,logbackup)' 2514 * before calling this routine. 2515 */ 2516void 2517createlog(const struct conf_entry *ent) 2518{ 2519 int fd, failed; 2520 struct stat st; 2521 char *realfile, *slash, tempfile[MAXPATHLEN]; 2522 2523 fd = -1; 2524 realfile = ent->log; 2525 2526 /* 2527 * If this log file is being created for the first time (-C option), 2528 * then it may also be true that the parent directory does not exist 2529 * yet. Check, and create that directory if it is missing. 2530 */ 2531 if (ent->firstcreate) { 2532 strlcpy(tempfile, realfile, sizeof(tempfile)); 2533 slash = strrchr(tempfile, '/'); 2534 if (slash != NULL) { 2535 *slash = '\0'; 2536 failed = stat(tempfile, &st); 2537 if (failed && errno != ENOENT) 2538 err(1, "Error on stat(%s)", tempfile); 2539 if (failed) 2540 createdir(ent, tempfile); 2541 else if (!S_ISDIR(st.st_mode)) 2542 errx(1, "%s exists but is not a directory", 2543 tempfile); 2544 } 2545 } 2546 2547 /* 2548 * First create an unused filename, so it can be chown'ed and 2549 * chmod'ed before it is moved into the real location. mkstemp 2550 * will create the file mode=600 & owned by us. Note that all 2551 * temp files will have a suffix of '.z<something>'. 2552 */ 2553 strlcpy(tempfile, realfile, sizeof(tempfile)); 2554 strlcat(tempfile, ".zXXXXXX", sizeof(tempfile)); 2555 if (noaction) 2556 printf("\tmktemp %s\n", tempfile); 2557 else { 2558 fd = mkstemp(tempfile); 2559 if (fd < 0) 2560 err(1, "can't mkstemp logfile %s", tempfile); 2561 2562 /* 2563 * Add status message to what will become the new log file. 2564 */ 2565 if (!(ent->flags & CE_BINARY)) { 2566 if (log_trim(tempfile, ent)) 2567 err(1, "can't add status message to log"); 2568 } 2569 } 2570 2571 /* Change the owner/group, if we are supposed to */ 2572 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2573 if (noaction) 2574 printf("\tchown %u:%u %s\n", ent->uid, ent->gid, 2575 tempfile); 2576 else { 2577 failed = fchown(fd, ent->uid, ent->gid); 2578 if (failed) 2579 err(1, "can't fchown temp file %s", tempfile); 2580 } 2581 } 2582 2583 /* Turn on NODUMP if it was requested in the config-file. */ 2584 if (ent->flags & CE_NODUMP) { 2585 if (noaction) 2586 printf("\tchflags nodump %s\n", tempfile); 2587 else { 2588 failed = fchflags(fd, UF_NODUMP); 2589 if (failed) { 2590 warn("log_trim: fchflags(NODUMP)"); 2591 } 2592 } 2593 } 2594 2595 /* 2596 * Note that if the real logfile still exists, and if the call 2597 * to rename() fails, then "neither the old file nor the new 2598 * file shall be changed or created" (to quote the standard). 2599 * If the call succeeds, then the file will be replaced without 2600 * any window where some other process might find that the file 2601 * did not exist. 2602 * XXX - ? It may be that for some error conditions, we could 2603 * retry by first removing the realfile and then renaming. 2604 */ 2605 if (noaction) { 2606 printf("\tchmod %o %s\n", ent->permissions, tempfile); 2607 printf("\tmv %s %s\n", tempfile, realfile); 2608 } else { 2609 failed = fchmod(fd, ent->permissions); 2610 if (failed) 2611 err(1, "can't fchmod temp file '%s'", tempfile); 2612 failed = rename(tempfile, realfile); 2613 if (failed) 2614 err(1, "can't mv %s to %s", tempfile, realfile); 2615 } 2616 2617 if (fd >= 0) 2618 close(fd); 2619} 2620 2621/* 2622 * Change the attributes of a given filename to what was specified in 2623 * the newsyslog.conf entry. This routine is only called for files 2624 * that newsyslog expects that it has created, and thus it is a fatal 2625 * error if this routine finds that the file does not exist. 2626 */ 2627static void 2628change_attrs(const char *fname, const struct conf_entry *ent) 2629{ 2630 int failed; 2631 2632 if (noaction) { 2633 printf("\tchmod %o %s\n", ent->permissions, fname); 2634 2635 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) 2636 printf("\tchown %u:%u %s\n", 2637 ent->uid, ent->gid, fname); 2638 2639 if (ent->flags & CE_NODUMP) 2640 printf("\tchflags nodump %s\n", fname); 2641 return; 2642 } 2643 2644 failed = chmod(fname, ent->permissions); 2645 if (failed) { 2646 if (errno != EPERM) 2647 err(1, "chmod(%s) in change_attrs", fname); 2648 warn("change_attrs couldn't chmod(%s)", fname); 2649 } 2650 2651 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2652 failed = chown(fname, ent->uid, ent->gid); 2653 if (failed) 2654 warn("can't chown %s", fname); 2655 } 2656 2657 if (ent->flags & CE_NODUMP) { 2658 failed = chflags(fname, UF_NODUMP); 2659 if (failed) 2660 warn("can't chflags %s NODUMP", fname); 2661 } 2662} 2663 2664/* 2665 * Parse a signal number or signal name. Returns the signal number parsed or -1 2666 * on failure. 2667 */ 2668static int 2669parse_signal(const char *str) 2670{ 2671 int sig, i; 2672 const char *errstr; 2673 2674 sig = strtonum(str, 1, sys_nsig - 1, &errstr); 2675 2676 if (errstr == NULL) 2677 return (sig); 2678 if (strncasecmp(str, "SIG", 3) == 0) 2679 str += 3; 2680 2681 for (i = 1; i < sys_nsig; i++) { 2682 if (strcasecmp(str, sys_signame[i]) == 0) 2683 return (i); 2684 } 2685 2686 return (-1); 2687} 2688