1 /*- 2 * ------+---------+---------+-------- + --------+---------+---------+---------* 3 * This file includes significant modifications done by: 4 * Copyright (c) 2003, 2004 - Garance Alistair Drosehn <gad@FreeBSD.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * ------+---------+---------+-------- + --------+---------+---------+---------* 29 */ 30 31 /* 32 * This file contains changes from the Open Software Foundation. 33 */ 34 35 /* 36 * Copyright 1988, 1989 by the Massachusetts Institute of Technology 37 * 38 * Permission to use, copy, modify, and distribute this software and its 39 * documentation for any purpose and without fee is hereby granted, provided 40 * that the above copyright notice appear in all copies and that both that 41 * copyright notice and this permission notice appear in supporting 42 * documentation, and that the names of M.I.T. and the M.I.T. S.I.P.B. not be 43 * used in advertising or publicity pertaining to distribution of the 44 * software without specific, written prior permission. M.I.T. and the M.I.T. 45 * S.I.P.B. make no representations about the suitability of this software 46 * for any purpose. It is provided "as is" without express or implied 47 * warranty. 48 * 49 */ 50 51 /* 52 * newsyslog - roll over selected logs at the appropriate time, keeping the a 53 * specified number of backup files around. 54 */ 55 56 #include <sys/cdefs.h> 57 __FBSDID("$FreeBSD$"); 58 59 #define OSF 60 #ifndef COMPRESS_POSTFIX 61 #define COMPRESS_POSTFIX ".gz" 62 #endif 63 #ifndef BZCOMPRESS_POSTFIX 64 #define BZCOMPRESS_POSTFIX ".bz2" 65 #endif 66 67 #include <sys/param.h> 68 #include <sys/queue.h> 69 #include <sys/stat.h> 70 #include <sys/wait.h> 71 72 #include <ctype.h> 73 #include <err.h> 74 #include <errno.h> 75 #include <fcntl.h> 76 #include <fnmatch.h> 77 #include <glob.h> 78 #include <grp.h> 79 #include <paths.h> 80 #include <pwd.h> 81 #include <signal.h> 82 #include <stdio.h> 83 #include <stdlib.h> 84 #include <string.h> 85 #include <time.h> 86 #include <unistd.h> 87 88 #include "pathnames.h" 89 #include "extern.h" 90 91 /* Define this symbol to try out the "new order" for work items. */ 92 #define TRY_NEWORDER 93 #ifndef USE_NEWORDER 94 #define USE_NEWORDER 1 /* Initial value for dbg_new_order */ 95 #endif 96 97 /* 98 * Bit-values for the 'flags' parsed from a config-file entry. 99 */ 100 #define CE_COMPACT 0x0001 /* Compact the achived log files with gzip. */ 101 #define CE_BZCOMPACT 0x0002 /* Compact the achived log files with bzip2. */ 102 #define CE_COMPACTWAIT 0x0004 /* wait until compressing one file finishes */ 103 /* before starting the next step. */ 104 #define CE_BINARY 0x0008 /* Logfile is in binary, do not add status */ 105 /* messages to logfile(s) when rotating. */ 106 #define CE_NOSIGNAL 0x0010 /* There is no process to signal when */ 107 /* trimming this file. */ 108 #define CE_TRIMAT 0x0020 /* trim file at a specific time. */ 109 #define CE_GLOB 0x0040 /* name of the log is file name pattern. */ 110 #define CE_SIGNALGROUP 0x0080 /* Signal a process-group instead of a single */ 111 /* process when trimming this file. */ 112 #define CE_CREATE 0x0100 /* Create the log file if it does not exist. */ 113 #define CE_NODUMP 0x0200 /* Set 'nodump' on newly created log file. */ 114 115 #define MIN_PID 5 /* Don't touch pids lower than this */ 116 #define MAX_PID 99999 /* was lower, see /usr/include/sys/proc.h */ 117 118 #define kbytes(size) (((size) + 1023) >> 10) 119 120 #define DEFAULT_MARKER "<default>" 121 #define DEBUG_MARKER "<debug>" 122 123 struct conf_entry { 124 char *log; /* Name of the log */ 125 char *pid_file; /* PID file */ 126 char *r_reason; /* The reason this file is being rotated */ 127 int firstcreate; /* Creating log for the first time (-C). */ 128 int rotate; /* Non-zero if this file should be rotated */ 129 int fsize; /* size found for the log file */ 130 uid_t uid; /* Owner of log */ 131 gid_t gid; /* Group of log */ 132 int numlogs; /* Number of logs to keep */ 133 int trsize; /* Size cutoff to trigger trimming the log */ 134 int hours; /* Hours between log trimming */ 135 struct ptime_data *trim_at; /* Specific time to do trimming */ 136 unsigned int permissions; /* File permissions on the log */ 137 int flags; /* CE_COMPACT, CE_BZCOMPACT, CE_BINARY */ 138 int sig; /* Signal to send */ 139 int def_cfg; /* Using the <default> rule for this file */ 140 struct conf_entry *next;/* Linked list pointer */ 141 }; 142 143 struct sigwork_entry { 144 SLIST_ENTRY(sigwork_entry) sw_nextp; 145 int sw_signum; /* the signal to send */ 146 int sw_pidok; /* true if pid value is valid */ 147 pid_t sw_pid; /* the process id from the PID file */ 148 const char *sw_pidtype; /* "daemon" or "process group" */ 149 char sw_fname[1]; /* file the PID was read from */ 150 }; 151 152 struct zipwork_entry { 153 SLIST_ENTRY(zipwork_entry) zw_nextp; 154 const struct conf_entry *zw_conf; /* for chown/perm/flag info */ 155 const struct sigwork_entry *zw_swork; /* to know success of signal */ 156 int zw_fsize; /* size of the file to compress */ 157 char zw_fname[1]; /* the file to compress */ 158 }; 159 160 typedef enum { 161 FREE_ENT, KEEP_ENT 162 } fk_entry; 163 164 SLIST_HEAD(swlisthead, sigwork_entry) swhead = SLIST_HEAD_INITIALIZER(swhead); 165 SLIST_HEAD(zwlisthead, zipwork_entry) zwhead = SLIST_HEAD_INITIALIZER(zwhead); 166 167 int dbg_at_times; /* -D Show details of 'trim_at' code */ 168 /* 169 * The debug options "neworder" and "oldorder" can be used to change 170 * which order work is done in. Note that both options will disappear 171 * in the near future, and the "new" order will be the only order. 172 */ 173 int dbg_new_order = USE_NEWORDER; 174 175 int archtodir = 0; /* Archive old logfiles to other directory */ 176 int createlogs; /* Create (non-GLOB) logfiles which do not */ 177 /* already exist. 1=='for entries with */ 178 /* C flag', 2=='for all entries'. */ 179 int verbose = 0; /* Print out what's going on */ 180 int needroot = 1; /* Root privs are necessary */ 181 int noaction = 0; /* Don't do anything, just show it */ 182 int nosignal; /* Do not send any signals */ 183 int force = 0; /* Force the trim no matter what */ 184 int rotatereq = 0; /* -R = Always rotate the file(s) as given */ 185 /* on the command (this also requires */ 186 /* that a list of files *are* given on */ 187 /* the run command). */ 188 char *requestor; /* The name given on a -R request */ 189 char *archdirname; /* Directory path to old logfiles archive */ 190 char *destdir = NULL; /* Directory to treat at root for logs */ 191 const char *conf; /* Configuration file to use */ 192 193 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */ 194 struct ptime_data *timenow; /* The time to use for checking at-fields */ 195 196 char hostname[MAXHOSTNAMELEN]; /* hostname */ 197 char daytime[16]; /* The current time in human readable form, 198 * used for rotation-tracking messages. */ 199 200 static struct conf_entry *get_worklist(char **files); 201 static void parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p, 202 struct conf_entry **glob_p, struct conf_entry **defconf_p); 203 static char *sob(char *p); 204 static char *son(char *p); 205 static int isnumberstr(const char *); 206 static char *missing_field(char *p, char *errline); 207 static void change_attrs(const char *, const struct conf_entry *); 208 static fk_entry do_entry(struct conf_entry *); 209 static fk_entry do_rotate(const struct conf_entry *); 210 #ifdef TRY_NEWORDER 211 static void do_sigwork(struct sigwork_entry *); 212 static void do_zipwork(struct zipwork_entry *); 213 static struct sigwork_entry * 214 save_sigwork(const struct conf_entry *); 215 static struct zipwork_entry * 216 save_zipwork(const struct conf_entry *, const struct 217 sigwork_entry *, int, const char *); 218 static void set_swpid(struct sigwork_entry *, const struct conf_entry *); 219 #endif 220 static int sizefile(const char *); 221 static void expand_globs(struct conf_entry **work_p, 222 struct conf_entry **glob_p); 223 static void free_clist(struct conf_entry **firstent); 224 static void free_entry(struct conf_entry *ent); 225 static struct conf_entry *init_entry(const char *fname, 226 struct conf_entry *src_entry); 227 static void parse_args(int argc, char **argv); 228 static int parse_doption(const char *doption); 229 static void usage(void); 230 static int log_trim(const char *logname, const struct conf_entry *log_ent); 231 static void compress_log(char *logname, int dowait); 232 static void bzcompress_log(char *logname, int dowait); 233 static int age_old_log(char *file); 234 static int send_signal(const struct conf_entry *ent); 235 static void savelog(char *from, char *to); 236 static void createdir(const struct conf_entry *ent, char *dirpart); 237 static void createlog(const struct conf_entry *ent); 238 239 /* 240 * All the following take a parameter of 'int', but expect values in the 241 * range of unsigned char. Define wrappers which take values of type 'char', 242 * whether signed or unsigned, and ensure they end up in the right range. 243 */ 244 #define isdigitch(Anychar) isdigit((u_char)(Anychar)) 245 #define isprintch(Anychar) isprint((u_char)(Anychar)) 246 #define isspacech(Anychar) isspace((u_char)(Anychar)) 247 #define tolowerch(Anychar) tolower((u_char)(Anychar)) 248 249 int 250 main(int argc, char **argv) 251 { 252 fk_entry free_or_keep; 253 struct conf_entry *p, *q; 254 #ifdef TRY_NEWORDER 255 struct sigwork_entry *stmp; 256 struct zipwork_entry *ztmp; 257 #endif 258 259 SLIST_INIT(&swhead); 260 SLIST_INIT(&zwhead); 261 262 parse_args(argc, argv); 263 argc -= optind; 264 argv += optind; 265 266 if (needroot && getuid() && geteuid()) 267 errx(1, "must have root privs"); 268 p = q = get_worklist(argv); 269 270 /* 271 * Rotate all the files which need to be rotated. Note that 272 * some users have *hundreds* of entries in newsyslog.conf! 273 */ 274 while (p) { 275 free_or_keep = do_entry(p); 276 p = p->next; 277 if (free_or_keep == FREE_ENT) 278 free_entry(q); 279 q = p; 280 } 281 282 #ifdef TRY_NEWORDER 283 /* 284 * Send signals to any processes which need a signal to tell 285 * them to close and re-open the log file(s) we have rotated. 286 * Note that zipwork_entries include pointers to these 287 * sigwork_entry's, so we can not free the entries here. 288 */ 289 if (!SLIST_EMPTY(&swhead)) { 290 if (noaction || verbose) 291 printf("Signal all daemon process(es)...\n"); 292 SLIST_FOREACH(stmp, &swhead, sw_nextp) 293 do_sigwork(stmp); 294 if (noaction) 295 printf("\tsleep 10\n"); 296 else { 297 if (verbose) 298 printf("Pause 10 seconds to allow daemon(s)" 299 " to close log file(s)\n"); 300 sleep(10); 301 } 302 } 303 /* 304 * Compress all files that we're expected to compress, now 305 * that all processes should have closed the files which 306 * have been rotated. 307 */ 308 if (!SLIST_EMPTY(&zwhead)) { 309 if (noaction || verbose) 310 printf("Compress all rotated log file(s)...\n"); 311 while (!SLIST_EMPTY(&zwhead)) { 312 ztmp = SLIST_FIRST(&zwhead); 313 do_zipwork(ztmp); 314 SLIST_REMOVE_HEAD(&zwhead, zw_nextp); 315 free(ztmp); 316 } 317 } 318 /* Now free all the sigwork entries. */ 319 while (!SLIST_EMPTY(&swhead)) { 320 stmp = SLIST_FIRST(&swhead); 321 SLIST_REMOVE_HEAD(&swhead, sw_nextp); 322 free(stmp); 323 } 324 #endif /* TRY_NEWORDER */ 325 326 while (wait(NULL) > 0 || errno == EINTR) 327 ; 328 return (0); 329 } 330 331 static struct conf_entry * 332 init_entry(const char *fname, struct conf_entry *src_entry) 333 { 334 struct conf_entry *tempwork; 335 336 if (verbose > 4) 337 printf("\t--> [creating entry for %s]\n", fname); 338 339 tempwork = malloc(sizeof(struct conf_entry)); 340 if (tempwork == NULL) 341 err(1, "malloc of conf_entry for %s", fname); 342 343 if (destdir == NULL || fname[0] != '/') 344 tempwork->log = strdup(fname); 345 else 346 asprintf(&tempwork->log, "%s%s", destdir, fname); 347 if (tempwork->log == NULL) 348 err(1, "strdup for %s", fname); 349 350 if (src_entry != NULL) { 351 tempwork->pid_file = NULL; 352 if (src_entry->pid_file) 353 tempwork->pid_file = strdup(src_entry->pid_file); 354 tempwork->r_reason = NULL; 355 tempwork->firstcreate = 0; 356 tempwork->rotate = 0; 357 tempwork->fsize = -1; 358 tempwork->uid = src_entry->uid; 359 tempwork->gid = src_entry->gid; 360 tempwork->numlogs = src_entry->numlogs; 361 tempwork->trsize = src_entry->trsize; 362 tempwork->hours = src_entry->hours; 363 tempwork->trim_at = NULL; 364 if (src_entry->trim_at != NULL) 365 tempwork->trim_at = ptime_init(src_entry->trim_at); 366 tempwork->permissions = src_entry->permissions; 367 tempwork->flags = src_entry->flags; 368 tempwork->sig = src_entry->sig; 369 tempwork->def_cfg = src_entry->def_cfg; 370 } else { 371 /* Initialize as a "do-nothing" entry */ 372 tempwork->pid_file = NULL; 373 tempwork->r_reason = NULL; 374 tempwork->firstcreate = 0; 375 tempwork->rotate = 0; 376 tempwork->fsize = -1; 377 tempwork->uid = (uid_t)-1; 378 tempwork->gid = (gid_t)-1; 379 tempwork->numlogs = 1; 380 tempwork->trsize = -1; 381 tempwork->hours = -1; 382 tempwork->trim_at = NULL; 383 tempwork->permissions = 0; 384 tempwork->flags = 0; 385 tempwork->sig = SIGHUP; 386 tempwork->def_cfg = 0; 387 } 388 tempwork->next = NULL; 389 390 return (tempwork); 391 } 392 393 static void 394 free_entry(struct conf_entry *ent) 395 { 396 397 if (ent == NULL) 398 return; 399 400 if (ent->log != NULL) { 401 if (verbose > 4) 402 printf("\t--> [freeing entry for %s]\n", ent->log); 403 free(ent->log); 404 ent->log = NULL; 405 } 406 407 if (ent->pid_file != NULL) { 408 free(ent->pid_file); 409 ent->pid_file = NULL; 410 } 411 412 if (ent->r_reason != NULL) { 413 free(ent->r_reason); 414 ent->r_reason = NULL; 415 } 416 417 if (ent->trim_at != NULL) { 418 ptime_free(ent->trim_at); 419 ent->trim_at = NULL; 420 } 421 422 free(ent); 423 } 424 425 static void 426 free_clist(struct conf_entry **firstent) 427 { 428 struct conf_entry *ent, *nextent; 429 430 if (firstent == NULL) 431 return; /* There is nothing to do. */ 432 433 ent = *firstent; 434 firstent = NULL; 435 436 while (ent) { 437 nextent = ent->next; 438 free_entry(ent); 439 ent = nextent; 440 } 441 } 442 443 static fk_entry 444 do_entry(struct conf_entry * ent) 445 { 446 #define REASON_MAX 80 447 int modtime; 448 fk_entry free_or_keep; 449 double diffsecs; 450 char temp_reason[REASON_MAX]; 451 452 free_or_keep = FREE_ENT; 453 if (verbose) { 454 if (ent->flags & CE_COMPACT) 455 printf("%s <%dZ>: ", ent->log, ent->numlogs); 456 else if (ent->flags & CE_BZCOMPACT) 457 printf("%s <%dJ>: ", ent->log, ent->numlogs); 458 else 459 printf("%s <%d>: ", ent->log, ent->numlogs); 460 } 461 ent->fsize = sizefile(ent->log); 462 modtime = age_old_log(ent->log); 463 ent->rotate = 0; 464 ent->firstcreate = 0; 465 if (ent->fsize < 0) { 466 /* 467 * If either the C flag or the -C option was specified, 468 * and if we won't be creating the file, then have the 469 * verbose message include a hint as to why the file 470 * will not be created. 471 */ 472 temp_reason[0] = '\0'; 473 if (createlogs > 1) 474 ent->firstcreate = 1; 475 else if ((ent->flags & CE_CREATE) && createlogs) 476 ent->firstcreate = 1; 477 else if (ent->flags & CE_CREATE) 478 strncpy(temp_reason, " (no -C option)", REASON_MAX); 479 else if (createlogs) 480 strncpy(temp_reason, " (no C flag)", REASON_MAX); 481 482 if (ent->firstcreate) { 483 if (verbose) 484 printf("does not exist -> will create.\n"); 485 createlog(ent); 486 } else if (verbose) { 487 printf("does not exist, skipped%s.\n", temp_reason); 488 } 489 } else { 490 if (ent->flags & CE_TRIMAT && !force && !rotatereq) { 491 diffsecs = ptimeget_diff(timenow, ent->trim_at); 492 if (diffsecs < 0.0) { 493 /* trim_at is some time in the future. */ 494 if (verbose) { 495 ptime_adjust4dst(ent->trim_at, 496 timenow); 497 printf("--> will trim at %s", 498 ptimeget_ctime(ent->trim_at)); 499 } 500 return (free_or_keep); 501 } else if (diffsecs >= 3600.0) { 502 /* 503 * trim_at is more than an hour in the past, 504 * so find the next valid trim_at time, and 505 * tell the user what that will be. 506 */ 507 if (verbose && dbg_at_times) 508 printf("\n\t--> prev trim at %s\t", 509 ptimeget_ctime(ent->trim_at)); 510 if (verbose) { 511 ptimeset_nxtime(ent->trim_at); 512 printf("--> will trim at %s", 513 ptimeget_ctime(ent->trim_at)); 514 } 515 return (free_or_keep); 516 } else if (verbose && noaction && dbg_at_times) { 517 /* 518 * If we are just debugging at-times, then 519 * a detailed message is helpful. Also 520 * skip "doing" any commands, since they 521 * would all be turned off by no-action. 522 */ 523 printf("\n\t--> timematch at %s", 524 ptimeget_ctime(ent->trim_at)); 525 return (free_or_keep); 526 } else if (verbose && ent->hours <= 0) { 527 printf("--> time is up\n"); 528 } 529 } 530 if (verbose && (ent->trsize > 0)) 531 printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize); 532 if (verbose && (ent->hours > 0)) 533 printf(" age (hr): %d [%d] ", modtime, ent->hours); 534 535 /* 536 * Figure out if this logfile needs to be rotated. 537 */ 538 temp_reason[0] = '\0'; 539 if (rotatereq) { 540 ent->rotate = 1; 541 snprintf(temp_reason, REASON_MAX, " due to -R from %s", 542 requestor); 543 } else if (force) { 544 ent->rotate = 1; 545 snprintf(temp_reason, REASON_MAX, " due to -F request"); 546 } else if ((ent->trsize > 0) && (ent->fsize >= ent->trsize)) { 547 ent->rotate = 1; 548 snprintf(temp_reason, REASON_MAX, " due to size>%dK", 549 ent->trsize); 550 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) { 551 ent->rotate = 1; 552 } else if ((ent->hours > 0) && ((modtime >= ent->hours) || 553 (modtime < 0))) { 554 ent->rotate = 1; 555 } 556 557 /* 558 * If the file needs to be rotated, then rotate it. 559 */ 560 if (ent->rotate) { 561 if (temp_reason[0] != '\0') 562 ent->r_reason = strdup(temp_reason); 563 if (verbose) 564 printf("--> trimming log....\n"); 565 if (noaction && !verbose) { 566 if (ent->flags & CE_COMPACT) 567 printf("%s <%dZ>: trimming\n", 568 ent->log, ent->numlogs); 569 else if (ent->flags & CE_BZCOMPACT) 570 printf("%s <%dJ>: trimming\n", 571 ent->log, ent->numlogs); 572 else 573 printf("%s <%d>: trimming\n", 574 ent->log, ent->numlogs); 575 } 576 free_or_keep = do_rotate(ent); 577 } else { 578 if (verbose) 579 printf("--> skipping\n"); 580 } 581 } 582 return (free_or_keep); 583 #undef REASON_MAX 584 } 585 586 /* Send a signal to the pid specified by pidfile */ 587 static int 588 send_signal(const struct conf_entry *ent) 589 { 590 pid_t target_pid; 591 int did_notify; 592 FILE *f; 593 long minok, maxok, rval; 594 const char *target_name; 595 char *endp, *linep, line[BUFSIZ]; 596 597 did_notify = 0; 598 f = fopen(ent->pid_file, "r"); 599 if (f == NULL) { 600 warn("can't open pid file: %s", ent->pid_file); 601 return (did_notify); 602 /* NOTREACHED */ 603 } 604 605 if (fgets(line, BUFSIZ, f) == NULL) { 606 /* 607 * XXX - If the pid file is empty, is that really a 608 * problem? Wouldn't that mean that the process 609 * has shut down? In that case there would be no 610 * problem with compressing the rotated log file. 611 */ 612 if (feof(f)) 613 warnx("pid file is empty: %s", ent->pid_file); 614 else 615 warn("can't read from pid file: %s", ent->pid_file); 616 (void) fclose(f); 617 return (did_notify); 618 /* NOTREACHED */ 619 } 620 (void) fclose(f); 621 622 target_name = "daemon"; 623 minok = MIN_PID; 624 maxok = MAX_PID; 625 if (ent->flags & CE_SIGNALGROUP) { 626 /* 627 * If we are expected to signal a process-group when 628 * rotating this logfile, then the value read in should 629 * be the negative of a valid process ID. 630 */ 631 target_name = "process-group"; 632 minok = -MAX_PID; 633 maxok = -MIN_PID; 634 } 635 636 errno = 0; 637 linep = line; 638 while (*linep == ' ') 639 linep++; 640 rval = strtol(linep, &endp, 10); 641 if (*endp != '\0' && !isspacech(*endp)) { 642 warnx("pid file does not start with a valid number: %s", 643 ent->pid_file); 644 rval = 0; 645 } else if (rval < minok || rval > maxok) { 646 warnx("bad value '%ld' for process number in %s", 647 rval, ent->pid_file); 648 if (verbose) 649 warnx("\t(expecting value between %ld and %ld)", 650 minok, maxok); 651 rval = 0; 652 } 653 if (rval == 0) { 654 return (did_notify); 655 /* NOTREACHED */ 656 } 657 658 target_pid = rval; 659 660 if (noaction) { 661 did_notify = 1; 662 printf("\tkill -%d %d\n", ent->sig, (int) target_pid); 663 } else if (kill(target_pid, ent->sig)) { 664 /* 665 * XXX - Iff the error was "no such process", should that 666 * really be an error for us? Perhaps the process 667 * is already gone, in which case there would be no 668 * problem with compressing the rotated log file. 669 */ 670 warn("can't notify %s, pid %d", target_name, 671 (int) target_pid); 672 } else { 673 did_notify = 1; 674 if (verbose) 675 printf("%s pid %d notified\n", target_name, 676 (int) target_pid); 677 } 678 679 return (did_notify); 680 } 681 682 static void 683 parse_args(int argc, char **argv) 684 { 685 int ch; 686 char *p; 687 688 timenow = ptime_init(NULL); 689 ptimeset_time(timenow, time(NULL)); 690 (void)strncpy(daytime, ptimeget_ctime(timenow) + 4, 15); 691 daytime[15] = '\0'; 692 693 /* Let's get our hostname */ 694 (void)gethostname(hostname, sizeof(hostname)); 695 696 /* Truncate domain */ 697 if ((p = strchr(hostname, '.')) != NULL) 698 *p = '\0'; 699 700 /* Parse command line options. */ 701 while ((ch = getopt(argc, argv, "a:d:f:nrsvCD:FR:")) != -1) 702 switch (ch) { 703 case 'a': 704 archtodir++; 705 archdirname = optarg; 706 break; 707 case 'd': 708 destdir = optarg; 709 break; 710 case 'f': 711 conf = optarg; 712 break; 713 case 'n': 714 noaction++; 715 break; 716 case 'r': 717 needroot = 0; 718 break; 719 case 's': 720 nosignal = 1; 721 break; 722 case 'v': 723 verbose++; 724 break; 725 case 'C': 726 /* Useful for things like rc.diskless... */ 727 createlogs++; 728 break; 729 case 'D': 730 /* 731 * Set some debugging option. The specific option 732 * depends on the value of optarg. These options 733 * may come and go without notice or documentation. 734 */ 735 if (parse_doption(optarg)) 736 break; 737 usage(); 738 /* NOTREACHED */ 739 case 'F': 740 force++; 741 break; 742 case 'R': 743 rotatereq++; 744 requestor = strdup(optarg); 745 break; 746 case 'm': /* Used by OpenBSD for "monitor mode" */ 747 default: 748 usage(); 749 /* NOTREACHED */ 750 } 751 752 if (rotatereq) { 753 if (optind == argc) { 754 warnx("At least one filename must be given when -R is specified."); 755 usage(); 756 /* NOTREACHED */ 757 } 758 /* Make sure "requestor" value is safe for a syslog message. */ 759 for (p = requestor; *p != '\0'; p++) { 760 if (!isprintch(*p) && (*p != '\t')) 761 *p = '.'; 762 } 763 } 764 765 if (dbg_timenow) { 766 /* 767 * Note that the 'daytime' variable is not changed. 768 * That is only used in messages that track when a 769 * logfile is rotated, and if a file *is* rotated, 770 * then it will still rotated at the "real now" time. 771 */ 772 ptime_free(timenow); 773 timenow = dbg_timenow; 774 fprintf(stderr, "Debug: Running as if TimeNow is %s", 775 ptimeget_ctime(dbg_timenow)); 776 } 777 778 } 779 780 /* 781 * These debugging options are mainly meant for developer use, such 782 * as writing regression-tests. They would not be needed by users 783 * during normal operation of newsyslog... 784 */ 785 static int 786 parse_doption(const char *doption) 787 { 788 const char TN[] = "TN="; 789 int res; 790 791 if (strncmp(doption, TN, sizeof(TN) - 1) == 0) { 792 /* 793 * The "TimeNow" debugging option. This might be off 794 * by an hour when crossing a timezone change. 795 */ 796 dbg_timenow = ptime_init(NULL); 797 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601, 798 time(NULL), doption + sizeof(TN) - 1); 799 if (res == -2) { 800 warnx("Non-existent time specified on -D %s", doption); 801 return (0); /* failure */ 802 } else if (res < 0) { 803 warnx("Malformed time given on -D %s", doption); 804 return (0); /* failure */ 805 } 806 return (1); /* successfully parsed */ 807 808 } 809 810 if (strcmp(doption, "ats") == 0) { 811 dbg_at_times++; 812 return (1); /* successfully parsed */ 813 } 814 815 if (strcmp(doption, "neworder") == 0) { 816 #ifdef TRY_NEWORDER 817 dbg_new_order++; 818 #else 819 warnx("NOTE: The code for 'neworder' was not compiled in."); 820 #endif 821 return (1); /* successfully parsed */ 822 } 823 if (strcmp(doption, "oldorder") == 0) { 824 #ifdef TRY_NEWORDER 825 dbg_new_order = 0; 826 #else 827 warnx("NOTE: The code for 'neworder' was not compiled in."); 828 #endif 829 return (1); /* successfully parsed */ 830 } 831 832 warnx("Unknown -D (debug) option: '%s'", doption); 833 return (0); /* failure */ 834 } 835 836 static void 837 usage(void) 838 { 839 840 fprintf(stderr, 841 "usage: newsyslog [-CFnrsv] [-a directory] [-d directory] [-f config-file]\n" 842 " [ [-R requestor] filename ... ]\n"); 843 exit(1); 844 } 845 846 /* 847 * Parse a configuration file and return a linked list of all the logs 848 * which should be processed. 849 */ 850 static struct conf_entry * 851 get_worklist(char **files) 852 { 853 FILE *f; 854 const char *fname; 855 char **given; 856 struct conf_entry *defconf, *dupent, *ent, *firstnew; 857 struct conf_entry *globlist, *lastnew, *worklist; 858 int gmatch, fnres; 859 860 defconf = globlist = worklist = NULL; 861 862 fname = conf; 863 if (fname == NULL) 864 fname = _PATH_CONF; 865 866 if (strcmp(fname, "-") != 0) 867 f = fopen(fname, "r"); 868 else { 869 f = stdin; 870 fname = "<stdin>"; 871 } 872 if (!f) 873 err(1, "%s", conf); 874 875 parse_file(f, fname, &worklist, &globlist, &defconf); 876 (void) fclose(f); 877 878 /* 879 * All config-file information has been read in and turned into 880 * a worklist and a globlist. If there were no specific files 881 * given on the run command, then the only thing left to do is to 882 * call a routine which finds all files matched by the globlist 883 * and adds them to the worklist. Then return the worklist. 884 */ 885 if (*files == NULL) { 886 expand_globs(&worklist, &globlist); 887 free_clist(&globlist); 888 if (defconf != NULL) 889 free_entry(defconf); 890 return (worklist); 891 /* NOTREACHED */ 892 } 893 894 /* 895 * If newsyslog was given a specific list of files to process, 896 * it may be that some of those files were not listed in any 897 * config file. Those unlisted files should get the default 898 * rotation action. First, create the default-rotation action 899 * if none was found in a system config file. 900 */ 901 if (defconf == NULL) { 902 defconf = init_entry(DEFAULT_MARKER, NULL); 903 defconf->numlogs = 3; 904 defconf->trsize = 50; 905 defconf->permissions = S_IRUSR|S_IWUSR; 906 } 907 908 /* 909 * If newsyslog was run with a list of specific filenames, 910 * then create a new worklist which has only those files in 911 * it, picking up the rotation-rules for those files from 912 * the original worklist. 913 * 914 * XXX - Note that this will copy multiple rules for a single 915 * logfile, if multiple entries are an exact match for 916 * that file. That matches the historic behavior, but do 917 * we want to continue to allow it? If so, it should 918 * probably be handled more intelligently. 919 */ 920 firstnew = lastnew = NULL; 921 for (given = files; *given; ++given) { 922 /* 923 * First try to find exact-matches for this given file. 924 */ 925 gmatch = 0; 926 for (ent = worklist; ent; ent = ent->next) { 927 if (strcmp(ent->log, *given) == 0) { 928 gmatch++; 929 dupent = init_entry(*given, ent); 930 if (!firstnew) 931 firstnew = dupent; 932 else 933 lastnew->next = dupent; 934 lastnew = dupent; 935 } 936 } 937 if (gmatch) { 938 if (verbose > 2) 939 printf("\t+ Matched entry %s\n", *given); 940 continue; 941 } 942 943 /* 944 * There was no exact-match for this given file, so look 945 * for a "glob" entry which does match. 946 */ 947 gmatch = 0; 948 if (verbose > 2 && globlist != NULL) 949 printf("\t+ Checking globs for %s\n", *given); 950 for (ent = globlist; ent; ent = ent->next) { 951 fnres = fnmatch(ent->log, *given, FNM_PATHNAME); 952 if (verbose > 2) 953 printf("\t+ = %d for pattern %s\n", fnres, 954 ent->log); 955 if (fnres == 0) { 956 gmatch++; 957 dupent = init_entry(*given, ent); 958 if (!firstnew) 959 firstnew = dupent; 960 else 961 lastnew->next = dupent; 962 lastnew = dupent; 963 /* This new entry is not a glob! */ 964 dupent->flags &= ~CE_GLOB; 965 /* Only allow a match to one glob-entry */ 966 break; 967 } 968 } 969 if (gmatch) { 970 if (verbose > 2) 971 printf("\t+ Matched %s via %s\n", *given, 972 ent->log); 973 continue; 974 } 975 976 /* 977 * This given file was not found in any config file, so 978 * add a worklist item based on the default entry. 979 */ 980 if (verbose > 2) 981 printf("\t+ No entry matched %s (will use %s)\n", 982 *given, DEFAULT_MARKER); 983 dupent = init_entry(*given, defconf); 984 if (!firstnew) 985 firstnew = dupent; 986 else 987 lastnew->next = dupent; 988 /* Mark that it was *not* found in a config file */ 989 dupent->def_cfg = 1; 990 lastnew = dupent; 991 } 992 993 /* 994 * Free all the entries in the original work list, the list of 995 * glob entries, and the default entry. 996 */ 997 free_clist(&worklist); 998 free_clist(&globlist); 999 free_entry(defconf); 1000 1001 /* And finally, return a worklist which matches the given files. */ 1002 return (firstnew); 1003 } 1004 1005 /* 1006 * Expand the list of entries with filename patterns, and add all files 1007 * which match those glob-entries onto the worklist. 1008 */ 1009 static void 1010 expand_globs(struct conf_entry **work_p, struct conf_entry **glob_p) 1011 { 1012 int gmatch, gres, i; 1013 char *mfname; 1014 struct conf_entry *dupent, *ent, *firstmatch, *globent; 1015 struct conf_entry *lastmatch; 1016 glob_t pglob; 1017 struct stat st_fm; 1018 1019 if ((glob_p == NULL) || (*glob_p == NULL)) 1020 return; /* There is nothing to do. */ 1021 1022 /* 1023 * The worklist contains all fully-specified (non-GLOB) names. 1024 * 1025 * Now expand the list of filename-pattern (GLOB) entries into 1026 * a second list, which (by definition) will only match files 1027 * that already exist. Do not add a glob-related entry for any 1028 * file which already exists in the fully-specified list. 1029 */ 1030 firstmatch = lastmatch = NULL; 1031 for (globent = *glob_p; globent; globent = globent->next) { 1032 1033 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob); 1034 if (gres != 0) { 1035 warn("cannot expand pattern (%d): %s", gres, 1036 globent->log); 1037 continue; 1038 } 1039 1040 if (verbose > 2) 1041 printf("\t+ Expanding pattern %s\n", globent->log); 1042 for (i = 0; i < pglob.gl_matchc; i++) { 1043 mfname = pglob.gl_pathv[i]; 1044 1045 /* See if this file already has a specific entry. */ 1046 gmatch = 0; 1047 for (ent = *work_p; ent; ent = ent->next) { 1048 if (strcmp(mfname, ent->log) == 0) { 1049 gmatch++; 1050 break; 1051 } 1052 } 1053 if (gmatch) 1054 continue; 1055 1056 /* Make sure the named matched is a file. */ 1057 gres = lstat(mfname, &st_fm); 1058 if (gres != 0) { 1059 /* Error on a file that glob() matched?!? */ 1060 warn("Skipping %s - lstat() error", mfname); 1061 continue; 1062 } 1063 if (!S_ISREG(st_fm.st_mode)) { 1064 /* We only rotate files! */ 1065 if (verbose > 2) 1066 printf("\t+ . skipping %s (!file)\n", 1067 mfname); 1068 continue; 1069 } 1070 1071 if (verbose > 2) 1072 printf("\t+ . add file %s\n", mfname); 1073 dupent = init_entry(mfname, globent); 1074 if (!firstmatch) 1075 firstmatch = dupent; 1076 else 1077 lastmatch->next = dupent; 1078 lastmatch = dupent; 1079 /* This new entry is not a glob! */ 1080 dupent->flags &= ~CE_GLOB; 1081 } 1082 globfree(&pglob); 1083 if (verbose > 2) 1084 printf("\t+ Done with pattern %s\n", globent->log); 1085 } 1086 1087 /* Add the list of matched files to the end of the worklist. */ 1088 if (!*work_p) 1089 *work_p = firstmatch; 1090 else { 1091 ent = *work_p; 1092 while (ent->next) 1093 ent = ent->next; 1094 ent->next = firstmatch; 1095 } 1096 1097 } 1098 1099 /* 1100 * Parse a configuration file and update a linked list of all the logs to 1101 * process. 1102 */ 1103 static void 1104 parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p, 1105 struct conf_entry **glob_p, struct conf_entry **defconf_p) 1106 { 1107 char line[BUFSIZ], *parse, *q; 1108 char *cp, *errline, *group; 1109 struct conf_entry *lastglob, *lastwork, *working; 1110 struct passwd *pwd; 1111 struct group *grp; 1112 int eol, ptm_opts, res, special; 1113 1114 /* 1115 * XXX - for now, assume that only one config file will be read, 1116 * ie, this routine is only called one time. 1117 */ 1118 lastglob = lastwork = NULL; 1119 1120 errline = NULL; 1121 while (fgets(line, BUFSIZ, cf)) { 1122 if ((line[0] == '\n') || (line[0] == '#') || 1123 (strlen(line) == 0)) 1124 continue; 1125 if (errline != NULL) 1126 free(errline); 1127 errline = strdup(line); 1128 for (cp = line + 1; *cp != '\0'; cp++) { 1129 if (*cp != '#') 1130 continue; 1131 if (*(cp - 1) == '\\') { 1132 strcpy(cp - 1, cp); 1133 cp--; 1134 continue; 1135 } 1136 *cp = '\0'; 1137 break; 1138 } 1139 1140 q = parse = missing_field(sob(line), errline); 1141 parse = son(line); 1142 if (!*parse) 1143 errx(1, "malformed line (missing fields):\n%s", 1144 errline); 1145 *parse = '\0'; 1146 1147 /* 1148 * Allow people to set debug options via the config file. 1149 * (NOTE: debug optons are undocumented, and may disappear 1150 * at any time, etc). 1151 */ 1152 if (strcasecmp(DEBUG_MARKER, q) == 0) { 1153 q = parse = missing_field(sob(++parse), errline); 1154 parse = son(parse); 1155 if (!*parse) 1156 warnx("debug line specifies no option:\n%s", 1157 errline); 1158 else { 1159 *parse = '\0'; 1160 parse_doption(q); 1161 } 1162 continue; 1163 } 1164 1165 special = 0; 1166 working = init_entry(q, NULL); 1167 if (strcasecmp(DEFAULT_MARKER, q) == 0) { 1168 special = 1; 1169 if (defconf_p == NULL) { 1170 warnx("Ignoring entry for %s in %s!", q, 1171 cfname); 1172 free_entry(working); 1173 continue; 1174 } else if (*defconf_p != NULL) { 1175 warnx("Ignoring duplicate entry for %s!", q); 1176 free_entry(working); 1177 continue; 1178 } 1179 *defconf_p = working; 1180 } 1181 1182 q = parse = missing_field(sob(++parse), errline); 1183 parse = son(parse); 1184 if (!*parse) 1185 errx(1, "malformed line (missing fields):\n%s", 1186 errline); 1187 *parse = '\0'; 1188 if ((group = strchr(q, ':')) != NULL || 1189 (group = strrchr(q, '.')) != NULL) { 1190 *group++ = '\0'; 1191 if (*q) { 1192 if (!(isnumberstr(q))) { 1193 if ((pwd = getpwnam(q)) == NULL) 1194 errx(1, 1195 "error in config file; unknown user:\n%s", 1196 errline); 1197 working->uid = pwd->pw_uid; 1198 } else 1199 working->uid = atoi(q); 1200 } else 1201 working->uid = (uid_t)-1; 1202 1203 q = group; 1204 if (*q) { 1205 if (!(isnumberstr(q))) { 1206 if ((grp = getgrnam(q)) == NULL) 1207 errx(1, 1208 "error in config file; unknown group:\n%s", 1209 errline); 1210 working->gid = grp->gr_gid; 1211 } else 1212 working->gid = atoi(q); 1213 } else 1214 working->gid = (gid_t)-1; 1215 1216 q = parse = missing_field(sob(++parse), errline); 1217 parse = son(parse); 1218 if (!*parse) 1219 errx(1, "malformed line (missing fields):\n%s", 1220 errline); 1221 *parse = '\0'; 1222 } else { 1223 working->uid = (uid_t)-1; 1224 working->gid = (gid_t)-1; 1225 } 1226 1227 if (!sscanf(q, "%o", &working->permissions)) 1228 errx(1, "error in config file; bad permissions:\n%s", 1229 errline); 1230 1231 q = parse = missing_field(sob(++parse), errline); 1232 parse = son(parse); 1233 if (!*parse) 1234 errx(1, "malformed line (missing fields):\n%s", 1235 errline); 1236 *parse = '\0'; 1237 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0) 1238 errx(1, "error in config file; bad value for count of logs to save:\n%s", 1239 errline); 1240 1241 q = parse = missing_field(sob(++parse), errline); 1242 parse = son(parse); 1243 if (!*parse) 1244 errx(1, "malformed line (missing fields):\n%s", 1245 errline); 1246 *parse = '\0'; 1247 if (isdigitch(*q)) 1248 working->trsize = atoi(q); 1249 else if (strcmp(q, "*") == 0) 1250 working->trsize = -1; 1251 else { 1252 warnx("Invalid value of '%s' for 'size' in line:\n%s", 1253 q, errline); 1254 working->trsize = -1; 1255 } 1256 1257 working->flags = 0; 1258 q = parse = missing_field(sob(++parse), errline); 1259 parse = son(parse); 1260 eol = !*parse; 1261 *parse = '\0'; 1262 { 1263 char *ep; 1264 u_long ul; 1265 1266 ul = strtoul(q, &ep, 10); 1267 if (ep == q) 1268 working->hours = 0; 1269 else if (*ep == '*') 1270 working->hours = -1; 1271 else if (ul > INT_MAX) 1272 errx(1, "interval is too large:\n%s", errline); 1273 else 1274 working->hours = ul; 1275 1276 if (*ep == '\0' || strcmp(ep, "*") == 0) 1277 goto no_trimat; 1278 if (*ep != '@' && *ep != '$') 1279 errx(1, "malformed interval/at:\n%s", errline); 1280 1281 working->flags |= CE_TRIMAT; 1282 working->trim_at = ptime_init(NULL); 1283 ptm_opts = PTM_PARSE_ISO8601; 1284 if (*ep == '$') 1285 ptm_opts = PTM_PARSE_DWM; 1286 ptm_opts |= PTM_PARSE_MATCHDOM; 1287 res = ptime_relparse(working->trim_at, ptm_opts, 1288 ptimeget_secs(timenow), ep + 1); 1289 if (res == -2) 1290 errx(1, "nonexistent time for 'at' value:\n%s", 1291 errline); 1292 else if (res < 0) 1293 errx(1, "malformed 'at' value:\n%s", errline); 1294 } 1295 no_trimat: 1296 1297 if (eol) 1298 q = NULL; 1299 else { 1300 q = parse = sob(++parse); /* Optional field */ 1301 parse = son(parse); 1302 if (!*parse) 1303 eol = 1; 1304 *parse = '\0'; 1305 } 1306 1307 for (; q && *q && !isspacech(*q); q++) { 1308 switch (tolowerch(*q)) { 1309 case 'b': 1310 working->flags |= CE_BINARY; 1311 break; 1312 case 'c': 1313 /* 1314 * XXX - Ick! Ugly! Remove ASAP! 1315 * We want `c' and `C' for "create". But we 1316 * will temporarily treat `c' as `g', because 1317 * FreeBSD releases <= 4.8 have a typo of 1318 * checking ('G' || 'c') for CE_GLOB. 1319 */ 1320 if (*q == 'c') { 1321 warnx("Assuming 'g' for 'c' in flags for line:\n%s", 1322 errline); 1323 warnx("The 'c' flag will eventually mean 'CREATE'"); 1324 working->flags |= CE_GLOB; 1325 break; 1326 } 1327 working->flags |= CE_CREATE; 1328 break; 1329 case 'd': 1330 working->flags |= CE_NODUMP; 1331 break; 1332 case 'g': 1333 working->flags |= CE_GLOB; 1334 break; 1335 case 'j': 1336 working->flags |= CE_BZCOMPACT; 1337 break; 1338 case 'n': 1339 working->flags |= CE_NOSIGNAL; 1340 break; 1341 case 'u': 1342 working->flags |= CE_SIGNALGROUP; 1343 break; 1344 case 'w': 1345 working->flags |= CE_COMPACTWAIT; 1346 break; 1347 case 'z': 1348 working->flags |= CE_COMPACT; 1349 break; 1350 case '-': 1351 break; 1352 case 'f': /* Used by OpenBSD for "CE_FOLLOW" */ 1353 case 'm': /* Used by OpenBSD for "CE_MONITOR" */ 1354 case 'p': /* Used by NetBSD for "CE_PLAIN0" */ 1355 default: 1356 errx(1, "illegal flag in config file -- %c", 1357 *q); 1358 } 1359 } 1360 1361 if (eol) 1362 q = NULL; 1363 else { 1364 q = parse = sob(++parse); /* Optional field */ 1365 parse = son(parse); 1366 if (!*parse) 1367 eol = 1; 1368 *parse = '\0'; 1369 } 1370 1371 working->pid_file = NULL; 1372 if (q && *q) { 1373 if (*q == '/') 1374 working->pid_file = strdup(q); 1375 else if (isdigit(*q)) 1376 goto got_sig; 1377 else 1378 errx(1, 1379 "illegal pid file or signal number in config file:\n%s", 1380 errline); 1381 } 1382 if (eol) 1383 q = NULL; 1384 else { 1385 q = parse = sob(++parse); /* Optional field */ 1386 *(parse = son(parse)) = '\0'; 1387 } 1388 1389 working->sig = SIGHUP; 1390 if (q && *q) { 1391 if (isdigit(*q)) { 1392 got_sig: 1393 working->sig = atoi(q); 1394 } else { 1395 err_sig: 1396 errx(1, 1397 "illegal signal number in config file:\n%s", 1398 errline); 1399 } 1400 if (working->sig < 1 || working->sig >= NSIG) 1401 goto err_sig; 1402 } 1403 1404 /* 1405 * Finish figuring out what pid-file to use (if any) in 1406 * later processing if this logfile needs to be rotated. 1407 */ 1408 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) { 1409 /* 1410 * This config-entry specified 'n' for nosignal, 1411 * see if it also specified an explicit pid_file. 1412 * This would be a pretty pointless combination. 1413 */ 1414 if (working->pid_file != NULL) { 1415 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s", 1416 working->pid_file, errline); 1417 free(working->pid_file); 1418 working->pid_file = NULL; 1419 } 1420 } else if (working->pid_file == NULL) { 1421 /* 1422 * This entry did not specify the 'n' flag, which 1423 * means it should signal syslogd unless it had 1424 * specified some other pid-file (and obviously the 1425 * syslog pid-file will not be for a process-group). 1426 * Also, we should only try to notify syslog if we 1427 * are root. 1428 */ 1429 if (working->flags & CE_SIGNALGROUP) { 1430 warnx("Ignoring flag 'U' in line:\n%s", 1431 errline); 1432 working->flags &= ~CE_SIGNALGROUP; 1433 } 1434 if (needroot) 1435 working->pid_file = strdup(_PATH_SYSLOGPID); 1436 } 1437 1438 /* 1439 * Add this entry to the appropriate list of entries, unless 1440 * it was some kind of special entry (eg: <default>). 1441 */ 1442 if (special) { 1443 ; /* Do not add to any list */ 1444 } else if (working->flags & CE_GLOB) { 1445 if (!*glob_p) 1446 *glob_p = working; 1447 else 1448 lastglob->next = working; 1449 lastglob = working; 1450 } else { 1451 if (!*work_p) 1452 *work_p = working; 1453 else 1454 lastwork->next = working; 1455 lastwork = working; 1456 } 1457 } 1458 if (errline != NULL) 1459 free(errline); 1460 } 1461 1462 static char * 1463 missing_field(char *p, char *errline) 1464 { 1465 1466 if (!p || !*p) 1467 errx(1, "missing field in config file:\n%s", errline); 1468 return (p); 1469 } 1470 1471 static fk_entry 1472 do_rotate(const struct conf_entry *ent) 1473 { 1474 char dirpart[MAXPATHLEN], namepart[MAXPATHLEN]; 1475 char file1[MAXPATHLEN], file2[MAXPATHLEN]; 1476 char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN]; 1477 char jfile1[MAXPATHLEN]; 1478 int flags, notified, need_notification, numlogs_c; 1479 fk_entry free_or_keep; 1480 struct stat st; 1481 1482 flags = ent->flags; 1483 free_or_keep = FREE_ENT; 1484 1485 if (archtodir) { 1486 char *p; 1487 1488 /* build complete name of archive directory into dirpart */ 1489 if (*archdirname == '/') { /* absolute */ 1490 strlcpy(dirpart, archdirname, sizeof(dirpart)); 1491 } else { /* relative */ 1492 /* get directory part of logfile */ 1493 strlcpy(dirpart, ent->log, sizeof(dirpart)); 1494 if ((p = rindex(dirpart, '/')) == NULL) 1495 dirpart[0] = '\0'; 1496 else 1497 *(p + 1) = '\0'; 1498 strlcat(dirpart, archdirname, sizeof(dirpart)); 1499 } 1500 1501 /* check if archive directory exists, if not, create it */ 1502 if (lstat(dirpart, &st)) 1503 createdir(ent, dirpart); 1504 1505 /* get filename part of logfile */ 1506 if ((p = rindex(ent->log, '/')) == NULL) 1507 strlcpy(namepart, ent->log, sizeof(namepart)); 1508 else 1509 strlcpy(namepart, p + 1, sizeof(namepart)); 1510 1511 /* name of oldest log */ 1512 (void) snprintf(file1, sizeof(file1), "%s/%s.%d", dirpart, 1513 namepart, ent->numlogs); 1514 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1, 1515 COMPRESS_POSTFIX); 1516 snprintf(jfile1, sizeof(jfile1), "%s%s", file1, 1517 BZCOMPRESS_POSTFIX); 1518 } else { 1519 /* name of oldest log */ 1520 (void) snprintf(file1, sizeof(file1), "%s.%d", ent->log, 1521 ent->numlogs); 1522 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1, 1523 COMPRESS_POSTFIX); 1524 snprintf(jfile1, sizeof(jfile1), "%s%s", file1, 1525 BZCOMPRESS_POSTFIX); 1526 } 1527 1528 if (noaction) { 1529 printf("\trm -f %s\n", file1); 1530 printf("\trm -f %s\n", zfile1); 1531 printf("\trm -f %s\n", jfile1); 1532 } else { 1533 (void) unlink(file1); 1534 (void) unlink(zfile1); 1535 (void) unlink(jfile1); 1536 } 1537 1538 /* Move down log files */ 1539 numlogs_c = ent->numlogs; /* copy for countdown */ 1540 while (numlogs_c--) { 1541 1542 (void) strlcpy(file2, file1, sizeof(file2)); 1543 1544 if (archtodir) 1545 (void) snprintf(file1, sizeof(file1), "%s/%s.%d", 1546 dirpart, namepart, numlogs_c); 1547 else 1548 (void) snprintf(file1, sizeof(file1), "%s.%d", 1549 ent->log, numlogs_c); 1550 1551 (void) strlcpy(zfile1, file1, sizeof(zfile1)); 1552 (void) strlcpy(zfile2, file2, sizeof(zfile2)); 1553 if (lstat(file1, &st)) { 1554 (void) strlcat(zfile1, COMPRESS_POSTFIX, 1555 sizeof(zfile1)); 1556 (void) strlcat(zfile2, COMPRESS_POSTFIX, 1557 sizeof(zfile2)); 1558 if (lstat(zfile1, &st)) { 1559 strlcpy(zfile1, file1, sizeof(zfile1)); 1560 strlcpy(zfile2, file2, sizeof(zfile2)); 1561 strlcat(zfile1, BZCOMPRESS_POSTFIX, 1562 sizeof(zfile1)); 1563 strlcat(zfile2, BZCOMPRESS_POSTFIX, 1564 sizeof(zfile2)); 1565 if (lstat(zfile1, &st)) 1566 continue; 1567 } 1568 } 1569 if (noaction) 1570 printf("\tmv %s %s\n", zfile1, zfile2); 1571 else { 1572 /* XXX - Ought to be checking for failure! */ 1573 (void)rename(zfile1, zfile2); 1574 } 1575 change_attrs(zfile2, ent); 1576 } 1577 1578 if (ent->numlogs > 0) { 1579 if (noaction) { 1580 /* 1581 * Note that savelog() may succeed with using link() 1582 * for the archtodir case, but there is no good way 1583 * of knowing if it will when doing "noaction", so 1584 * here we claim that it will have to do a copy... 1585 */ 1586 if (archtodir) 1587 printf("\tcp %s %s\n", ent->log, file1); 1588 else 1589 printf("\tln %s %s\n", ent->log, file1); 1590 } else { 1591 if (!(flags & CE_BINARY)) { 1592 /* Report the trimming to the old log */ 1593 log_trim(ent->log, ent); 1594 } 1595 savelog(ent->log, file1); 1596 } 1597 change_attrs(file1, ent); 1598 } 1599 1600 /* Create the new log file and move it into place */ 1601 if (noaction) 1602 printf("Start new log...\n"); 1603 createlog(ent); 1604 1605 #ifdef TRY_NEWORDER 1606 /* 1607 * Save all signalling and file-compression to be done after log 1608 * files from all entries have been rotated. This way any one 1609 * process will not be sent the same signal multiple times when 1610 * multiple log files had to be rotated. 1611 */ 1612 if (dbg_new_order) { 1613 struct sigwork_entry *swork; 1614 1615 swork = NULL; 1616 if (ent->pid_file != NULL) 1617 swork = save_sigwork(ent); 1618 if (ent->numlogs > 0 && (flags & (CE_COMPACT | CE_BZCOMPACT))) { 1619 /* 1620 * The zipwork_entry will include a pointer to this 1621 * conf_entry, so the conf_entry should not be freed. 1622 */ 1623 free_or_keep = KEEP_ENT; 1624 save_zipwork(ent, swork, ent->fsize, file1); 1625 } 1626 return (free_or_keep); 1627 } 1628 #endif /* TRY_NEWORDER */ 1629 1630 /* 1631 * Find out if there is a process to signal. If nosignal (-s) was 1632 * specified, then do not signal any process. Note that nosignal 1633 * will trigger a warning message if the rotated logfile needs to 1634 * be compressed, *unless* -R was specified. This is because there 1635 * presumably still are process(es) writing to the old logfile, but 1636 * we assume that a -sR request comes from a process which writes 1637 * to the logfile, and as such, that process has already made sure 1638 * that the logfile is not presently in use. 1639 */ 1640 need_notification = notified = 0; 1641 if (ent->pid_file != NULL) { 1642 need_notification = 1; 1643 if (!nosignal) 1644 notified = send_signal(ent); /* the normal case! */ 1645 else if (rotatereq) 1646 need_notification = 0; 1647 } 1648 1649 if ((flags & CE_COMPACT) || (flags & CE_BZCOMPACT)) { 1650 if (need_notification && !notified) 1651 warnx( 1652 "log %s.0 not compressed because daemon(s) not notified", 1653 ent->log); 1654 else if (noaction) { 1655 printf("\tsleep 10\n"); 1656 if (flags & CE_COMPACT) 1657 printf("\tgzip %s.0\n", ent->log); 1658 else 1659 printf("\tbzip2 %s.0\n", ent->log); 1660 } else { 1661 if (notified) { 1662 if (verbose) 1663 printf("small pause to allow daemon(s) to close log\n"); 1664 sleep(10); 1665 } 1666 if (archtodir) { 1667 (void) snprintf(file1, sizeof(file1), "%s/%s", 1668 dirpart, namepart); 1669 if (flags & CE_COMPACT) 1670 compress_log(file1, 1671 flags & CE_COMPACTWAIT); 1672 else if (flags & CE_BZCOMPACT) 1673 bzcompress_log(file1, 1674 flags & CE_COMPACTWAIT); 1675 } else { 1676 if (flags & CE_COMPACT) 1677 compress_log(ent->log, 1678 flags & CE_COMPACTWAIT); 1679 else if (flags & CE_BZCOMPACT) 1680 bzcompress_log(ent->log, 1681 flags & CE_COMPACTWAIT); 1682 } 1683 } 1684 } 1685 return (free_or_keep); 1686 } 1687 1688 #ifdef TRY_NEWORDER 1689 static void 1690 do_sigwork(struct sigwork_entry *swork) 1691 { 1692 struct sigwork_entry *nextsig; 1693 int kres, secs; 1694 1695 if (!(swork->sw_pidok) || swork->sw_pid == 0) 1696 return; /* no work to do... */ 1697 1698 /* 1699 * If nosignal (-s) was specified, then do not signal any process. 1700 * Note that a nosignal request triggers a warning message if the 1701 * rotated logfile needs to be compressed, *unless* -R was also 1702 * specified. We assume that an `-sR' request came from a process 1703 * which writes to the logfile, and as such, we assume that process 1704 * has already made sure the logfile is not presently in use. This 1705 * just sets swork->sw_pidok to a special value, and do_zipwork 1706 * will print any necessary warning(s). 1707 */ 1708 if (nosignal) { 1709 if (!rotatereq) 1710 swork->sw_pidok = -1; 1711 return; 1712 } 1713 1714 /* 1715 * Compute the pause between consecutive signals. Use a longer 1716 * sleep time if we will be sending two signals to the same 1717 * deamon or process-group. 1718 */ 1719 secs = 0; 1720 nextsig = SLIST_NEXT(swork, sw_nextp); 1721 if (nextsig != NULL) { 1722 if (swork->sw_pid == nextsig->sw_pid) 1723 secs = 10; 1724 else 1725 secs = 1; 1726 } 1727 1728 if (noaction) { 1729 printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum, 1730 (int)swork->sw_pid, swork->sw_fname); 1731 if (secs > 0) 1732 printf("\tsleep %d\n", secs); 1733 return; 1734 } 1735 1736 kres = kill(swork->sw_pid, swork->sw_signum); 1737 if (kres != 0) { 1738 /* 1739 * Assume that "no such process" (ESRCH) is something 1740 * to warn about, but is not an error. Presumably the 1741 * process which writes to the rotated log file(s) is 1742 * gone, in which case we should have no problem with 1743 * compressing the rotated log file(s). 1744 */ 1745 if (errno != ESRCH) 1746 swork->sw_pidok = 0; 1747 warn("can't notify %s, pid %d", swork->sw_pidtype, 1748 (int)swork->sw_pid); 1749 } else { 1750 if (verbose) 1751 printf("Notified %s pid %d = %s\n", swork->sw_pidtype, 1752 (int)swork->sw_pid, swork->sw_fname); 1753 if (secs > 0) { 1754 if (verbose) 1755 printf("Pause %d second(s) between signals\n", 1756 secs); 1757 sleep(secs); 1758 } 1759 } 1760 } 1761 1762 static void 1763 do_zipwork(struct zipwork_entry *zwork) 1764 { 1765 const char *pgm_name, *pgm_path; 1766 int zstatus; 1767 pid_t pidzip, wpid; 1768 char zresult[MAXPATHLEN]; 1769 1770 pgm_path = NULL; 1771 strlcpy(zresult, zwork->zw_fname, sizeof(zresult)); 1772 if (zwork != NULL && zwork->zw_conf != NULL) { 1773 if (zwork->zw_conf->flags & CE_COMPACT) { 1774 pgm_path = _PATH_GZIP; 1775 strlcat(zresult, COMPRESS_POSTFIX, sizeof(zresult)); 1776 } else if (zwork->zw_conf->flags & CE_BZCOMPACT) { 1777 pgm_path = _PATH_BZIP2; 1778 strlcat(zresult, BZCOMPRESS_POSTFIX, sizeof(zresult)); 1779 } 1780 } 1781 if (pgm_path == NULL) { 1782 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname); 1783 return; 1784 } 1785 1786 if (zwork->zw_swork != NULL && zwork->zw_swork->sw_pidok <= 0) { 1787 warnx( 1788 "log %s not compressed because daemon(s) not notified", 1789 zwork->zw_fname); 1790 change_attrs(zwork->zw_fname, zwork->zw_conf); 1791 return; 1792 } 1793 1794 if (noaction) { 1795 pgm_name = strrchr(pgm_path, '/'); 1796 if (pgm_name == NULL) 1797 pgm_name = pgm_path; 1798 else 1799 pgm_name++; 1800 printf("\t%s %s\n", pgm_name, zwork->zw_fname); 1801 change_attrs(zresult, zwork->zw_conf); 1802 return; 1803 } 1804 1805 pidzip = fork(); 1806 if (pidzip < 0) 1807 err(1, "gzip fork"); 1808 else if (!pidzip) { 1809 /* The child process executes the compression command */ 1810 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0); 1811 err(1, "%s", pgm_path); 1812 } 1813 1814 wpid = waitpid(pidzip, &zstatus, 0); 1815 if (wpid == -1) { 1816 warn("%s: waitpid(%d)", pgm_path, pidzip); 1817 return; 1818 } 1819 if (!WIFEXITED(zstatus)) { 1820 warn("%s: did not terminate normally", pgm_path); 1821 return; 1822 } 1823 if (WEXITSTATUS(zstatus)) { 1824 warn("%s: terminated with %d (non-zero) status", 1825 pgm_path, WEXITSTATUS(zstatus)); 1826 return; 1827 } 1828 1829 /* Compression was successful, set file attributes on the result. */ 1830 change_attrs(zresult, zwork->zw_conf); 1831 } 1832 1833 /* 1834 * Save information on any process we need to signal. Any single 1835 * process may need to be sent different signal-values for different 1836 * log files, but usually a single signal-value will cause the process 1837 * to close and re-open all of it's log files. 1838 */ 1839 static struct sigwork_entry * 1840 save_sigwork(const struct conf_entry *ent) 1841 { 1842 struct sigwork_entry *sprev, *stmp; 1843 int ndiff; 1844 size_t tmpsiz; 1845 1846 sprev = NULL; 1847 ndiff = 1; 1848 SLIST_FOREACH(stmp, &swhead, sw_nextp) { 1849 ndiff = strcmp(ent->pid_file, stmp->sw_fname); 1850 if (ndiff > 0) 1851 break; 1852 if (ndiff == 0) { 1853 if (ent->sig == stmp->sw_signum) 1854 break; 1855 if (ent->sig > stmp->sw_signum) { 1856 ndiff = 1; 1857 break; 1858 } 1859 } 1860 sprev = stmp; 1861 } 1862 if (stmp != NULL && ndiff == 0) 1863 return (stmp); 1864 1865 tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_file) + 1; 1866 stmp = malloc(tmpsiz); 1867 set_swpid(stmp, ent); 1868 stmp->sw_signum = ent->sig; 1869 strcpy(stmp->sw_fname, ent->pid_file); 1870 if (sprev == NULL) 1871 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp); 1872 else 1873 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp); 1874 return (stmp); 1875 } 1876 1877 /* 1878 * Save information on any file we need to compress. We may see the same 1879 * file multiple times, so check the full list to avoid duplicates. The 1880 * list itself is sorted smallest-to-largest, because that's the order we 1881 * want to compress the files. If the partition is very low on disk space, 1882 * then the smallest files are the most likely to compress, and compressing 1883 * them first will free up more space for the larger files. 1884 */ 1885 static struct zipwork_entry * 1886 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork, 1887 int zsize, const char *zipfname) 1888 { 1889 struct zipwork_entry *zprev, *ztmp; 1890 int ndiff; 1891 size_t tmpsiz; 1892 1893 /* Compute the size if the caller did not know it. */ 1894 if (zsize < 0) 1895 zsize = sizefile(zipfname); 1896 1897 zprev = NULL; 1898 ndiff = 1; 1899 SLIST_FOREACH(ztmp, &zwhead, zw_nextp) { 1900 ndiff = strcmp(zipfname, ztmp->zw_fname); 1901 if (ndiff == 0) 1902 break; 1903 if (zsize > ztmp->zw_fsize) 1904 zprev = ztmp; 1905 } 1906 if (ztmp != NULL && ndiff == 0) 1907 return (ztmp); 1908 1909 tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1; 1910 ztmp = malloc(tmpsiz); 1911 ztmp->zw_conf = ent; 1912 ztmp->zw_swork = swork; 1913 ztmp->zw_fsize = zsize; 1914 strcpy(ztmp->zw_fname, zipfname); 1915 if (zprev == NULL) 1916 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp); 1917 else 1918 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp); 1919 return (ztmp); 1920 } 1921 1922 /* Send a signal to the pid specified by pidfile */ 1923 static void 1924 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent) 1925 { 1926 FILE *f; 1927 long minok, maxok, rval; 1928 char *endp, *linep, line[BUFSIZ]; 1929 1930 minok = MIN_PID; 1931 maxok = MAX_PID; 1932 swork->sw_pidok = 0; 1933 swork->sw_pid = 0; 1934 swork->sw_pidtype = "daemon"; 1935 if (ent->flags & CE_SIGNALGROUP) { 1936 /* 1937 * If we are expected to signal a process-group when 1938 * rotating this logfile, then the value read in should 1939 * be the negative of a valid process ID. 1940 */ 1941 minok = -MAX_PID; 1942 maxok = -MIN_PID; 1943 swork->sw_pidtype = "process-group"; 1944 } 1945 1946 f = fopen(ent->pid_file, "r"); 1947 if (f == NULL) { 1948 warn("can't open pid file: %s", ent->pid_file); 1949 return; 1950 } 1951 1952 if (fgets(line, BUFSIZ, f) == NULL) { 1953 /* 1954 * Warn if the PID file is empty, but do not consider 1955 * it an error. Most likely it means the process has 1956 * has terminated, so it should be safe to rotate any 1957 * log files that the process would have been using. 1958 */ 1959 if (feof(f)) { 1960 swork->sw_pidok = 1; 1961 warnx("pid file is empty: %s", ent->pid_file); 1962 } else 1963 warn("can't read from pid file: %s", ent->pid_file); 1964 (void)fclose(f); 1965 return; 1966 } 1967 (void)fclose(f); 1968 1969 errno = 0; 1970 linep = line; 1971 while (*linep == ' ') 1972 linep++; 1973 rval = strtol(linep, &endp, 10); 1974 if (*endp != '\0' && !isspacech(*endp)) { 1975 warnx("pid file does not start with a valid number: %s", 1976 ent->pid_file); 1977 } else if (rval < minok || rval > maxok) { 1978 warnx("bad value '%ld' for process number in %s", 1979 rval, ent->pid_file); 1980 if (verbose) 1981 warnx("\t(expecting value between %ld and %ld)", 1982 minok, maxok); 1983 } else { 1984 swork->sw_pidok = 1; 1985 swork->sw_pid = rval; 1986 } 1987 1988 return; 1989 } 1990 #endif /* TRY_NEWORDER */ 1991 1992 /* Log the fact that the logs were turned over */ 1993 static int 1994 log_trim(const char *logname, const struct conf_entry *log_ent) 1995 { 1996 FILE *f; 1997 const char *xtra; 1998 1999 if ((f = fopen(logname, "a")) == NULL) 2000 return (-1); 2001 xtra = ""; 2002 if (log_ent->def_cfg) 2003 xtra = " using <default> rule"; 2004 if (log_ent->firstcreate) 2005 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n", 2006 daytime, hostname, (int) getpid(), xtra); 2007 else if (log_ent->r_reason != NULL) 2008 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n", 2009 daytime, hostname, (int) getpid(), log_ent->r_reason, xtra); 2010 else 2011 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n", 2012 daytime, hostname, (int) getpid(), xtra); 2013 if (fclose(f) == EOF) 2014 err(1, "log_trim: fclose"); 2015 return (0); 2016 } 2017 2018 /* 2019 * XXX - Note that both compress_log and bzcompress_log will lose the 2020 * NODUMP flag if it was set on somelog.0. Fixing that in newsyslog 2021 * (as opposed to fixing gzip/bzip2) will require some restructuring 2022 * of the code. That restructuring is planned for a later update... 2023 */ 2024 /* Fork of gzip to compress the old log file */ 2025 static void 2026 compress_log(char *logname, int dowait) 2027 { 2028 pid_t pid; 2029 char tmp[MAXPATHLEN]; 2030 2031 while (dowait && (wait(NULL) > 0 || errno == EINTR)) 2032 ; 2033 (void) snprintf(tmp, sizeof(tmp), "%s.0", logname); 2034 pid = fork(); 2035 if (pid < 0) 2036 err(1, "gzip fork"); 2037 else if (!pid) { 2038 (void) execl(_PATH_GZIP, _PATH_GZIP, "-f", tmp, (char *)0); 2039 err(1, _PATH_GZIP); 2040 } 2041 } 2042 2043 /* Fork of bzip2 to compress the old log file */ 2044 static void 2045 bzcompress_log(char *logname, int dowait) 2046 { 2047 pid_t pid; 2048 char tmp[MAXPATHLEN]; 2049 2050 while (dowait && (wait(NULL) > 0 || errno == EINTR)) 2051 ; 2052 snprintf(tmp, sizeof(tmp), "%s.0", logname); 2053 pid = fork(); 2054 if (pid < 0) 2055 err(1, "bzip2 fork"); 2056 else if (!pid) { 2057 execl(_PATH_BZIP2, _PATH_BZIP2, "-f", tmp, (char *)0); 2058 err(1, _PATH_BZIP2); 2059 } 2060 } 2061 2062 /* Return size in kilobytes of a file */ 2063 static int 2064 sizefile(const char *file) 2065 { 2066 struct stat sb; 2067 2068 if (stat(file, &sb) < 0) 2069 return (-1); 2070 return (kbytes(dbtob(sb.st_blocks))); 2071 } 2072 2073 /* Return the age of old log file (file.0) */ 2074 static int 2075 age_old_log(char *file) 2076 { 2077 struct stat sb; 2078 char *endp; 2079 char tmp[MAXPATHLEN + sizeof(".0") + sizeof(COMPRESS_POSTFIX) + 2080 sizeof(BZCOMPRESS_POSTFIX) + 1]; 2081 2082 if (archtodir) { 2083 char *p; 2084 2085 /* build name of archive directory into tmp */ 2086 if (*archdirname == '/') { /* absolute */ 2087 strlcpy(tmp, archdirname, sizeof(tmp)); 2088 } else { /* relative */ 2089 /* get directory part of logfile */ 2090 strlcpy(tmp, file, sizeof(tmp)); 2091 if ((p = rindex(tmp, '/')) == NULL) 2092 tmp[0] = '\0'; 2093 else 2094 *(p + 1) = '\0'; 2095 strlcat(tmp, archdirname, sizeof(tmp)); 2096 } 2097 2098 strlcat(tmp, "/", sizeof(tmp)); 2099 2100 /* get filename part of logfile */ 2101 if ((p = rindex(file, '/')) == NULL) 2102 strlcat(tmp, file, sizeof(tmp)); 2103 else 2104 strlcat(tmp, p + 1, sizeof(tmp)); 2105 } else { 2106 (void) strlcpy(tmp, file, sizeof(tmp)); 2107 } 2108 2109 strlcat(tmp, ".0", sizeof(tmp)); 2110 if (stat(tmp, &sb) < 0) { 2111 /* 2112 * A plain '.0' file does not exist. Try again, first 2113 * with the added suffix of '.gz', then with an added 2114 * suffix of '.bz2' instead of '.gz'. 2115 */ 2116 endp = strchr(tmp, '\0'); 2117 strlcat(tmp, COMPRESS_POSTFIX, sizeof(tmp)); 2118 if (stat(tmp, &sb) < 0) { 2119 *endp = '\0'; /* Remove .gz */ 2120 strlcat(tmp, BZCOMPRESS_POSTFIX, sizeof(tmp)); 2121 if (stat(tmp, &sb) < 0) 2122 return (-1); 2123 } 2124 } 2125 return ((int)(ptimeget_secs(timenow) - sb.st_mtime + 1800) / 3600); 2126 } 2127 2128 /* Skip Over Blanks */ 2129 static char * 2130 sob(char *p) 2131 { 2132 while (p && *p && isspace(*p)) 2133 p++; 2134 return (p); 2135 } 2136 2137 /* Skip Over Non-Blanks */ 2138 static char * 2139 son(char *p) 2140 { 2141 while (p && *p && !isspace(*p)) 2142 p++; 2143 return (p); 2144 } 2145 2146 /* Check if string is actually a number */ 2147 static int 2148 isnumberstr(const char *string) 2149 { 2150 while (*string) { 2151 if (!isdigitch(*string++)) 2152 return (0); 2153 } 2154 return (1); 2155 } 2156 2157 /* 2158 * Save the active log file under a new name. A link to the new name 2159 * is the quick-and-easy way to do this. If that fails (which it will 2160 * if the destination is on another partition), then make a copy of 2161 * the file to the new location. 2162 */ 2163 static void 2164 savelog(char *from, char *to) 2165 { 2166 FILE *src, *dst; 2167 int c, res; 2168 2169 res = link(from, to); 2170 if (res == 0) 2171 return; 2172 2173 if ((src = fopen(from, "r")) == NULL) 2174 err(1, "can't fopen %s for reading", from); 2175 if ((dst = fopen(to, "w")) == NULL) 2176 err(1, "can't fopen %s for writing", to); 2177 2178 while ((c = getc(src)) != EOF) { 2179 if ((putc(c, dst)) == EOF) 2180 err(1, "error writing to %s", to); 2181 } 2182 2183 if (ferror(src)) 2184 err(1, "error reading from %s", from); 2185 if ((fclose(src)) != 0) 2186 err(1, "can't fclose %s", to); 2187 if ((fclose(dst)) != 0) 2188 err(1, "can't fclose %s", from); 2189 } 2190 2191 /* create one or more directory components of a path */ 2192 static void 2193 createdir(const struct conf_entry *ent, char *dirpart) 2194 { 2195 int res; 2196 char *s, *d; 2197 char mkdirpath[MAXPATHLEN]; 2198 struct stat st; 2199 2200 s = dirpart; 2201 d = mkdirpath; 2202 2203 for (;;) { 2204 *d++ = *s++; 2205 if (*s != '/' && *s != '\0') 2206 continue; 2207 *d = '\0'; 2208 res = lstat(mkdirpath, &st); 2209 if (res != 0) { 2210 if (noaction) { 2211 printf("\tmkdir %s\n", mkdirpath); 2212 } else { 2213 res = mkdir(mkdirpath, 0755); 2214 if (res != 0) 2215 err(1, "Error on mkdir(\"%s\") for -a", 2216 mkdirpath); 2217 } 2218 } 2219 if (*s == '\0') 2220 break; 2221 } 2222 if (verbose) { 2223 if (ent->firstcreate) 2224 printf("Created directory '%s' for new %s\n", 2225 dirpart, ent->log); 2226 else 2227 printf("Created directory '%s' for -a\n", dirpart); 2228 } 2229 } 2230 2231 /* 2232 * Create a new log file, destroying any currently-existing version 2233 * of the log file in the process. If the caller wants a backup copy 2234 * of the file to exist, they should call 'link(logfile,logbackup)' 2235 * before calling this routine. 2236 */ 2237 void 2238 createlog(const struct conf_entry *ent) 2239 { 2240 int fd, failed; 2241 struct stat st; 2242 char *realfile, *slash, tempfile[MAXPATHLEN]; 2243 2244 fd = -1; 2245 realfile = ent->log; 2246 2247 /* 2248 * If this log file is being created for the first time (-C option), 2249 * then it may also be true that the parent directory does not exist 2250 * yet. Check, and create that directory if it is missing. 2251 */ 2252 if (ent->firstcreate) { 2253 strlcpy(tempfile, realfile, sizeof(tempfile)); 2254 slash = strrchr(tempfile, '/'); 2255 if (slash != NULL) { 2256 *slash = '\0'; 2257 failed = stat(tempfile, &st); 2258 if (failed && errno != ENOENT) 2259 err(1, "Error on stat(%s)", tempfile); 2260 if (failed) 2261 createdir(ent, tempfile); 2262 else if (!S_ISDIR(st.st_mode)) 2263 errx(1, "%s exists but is not a directory", 2264 tempfile); 2265 } 2266 } 2267 2268 /* 2269 * First create an unused filename, so it can be chown'ed and 2270 * chmod'ed before it is moved into the real location. mkstemp 2271 * will create the file mode=600 & owned by us. Note that all 2272 * temp files will have a suffix of '.z<something>'. 2273 */ 2274 strlcpy(tempfile, realfile, sizeof(tempfile)); 2275 strlcat(tempfile, ".zXXXXXX", sizeof(tempfile)); 2276 if (noaction) 2277 printf("\tmktemp %s\n", tempfile); 2278 else { 2279 fd = mkstemp(tempfile); 2280 if (fd < 0) 2281 err(1, "can't mkstemp logfile %s", tempfile); 2282 2283 /* 2284 * Add status message to what will become the new log file. 2285 */ 2286 if (!(ent->flags & CE_BINARY)) { 2287 if (log_trim(tempfile, ent)) 2288 err(1, "can't add status message to log"); 2289 } 2290 } 2291 2292 /* Change the owner/group, if we are supposed to */ 2293 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2294 if (noaction) 2295 printf("\tchown %u:%u %s\n", ent->uid, ent->gid, 2296 tempfile); 2297 else { 2298 failed = fchown(fd, ent->uid, ent->gid); 2299 if (failed) 2300 err(1, "can't fchown temp file %s", tempfile); 2301 } 2302 } 2303 2304 /* Turn on NODUMP if it was requested in the config-file. */ 2305 if (ent->flags & CE_NODUMP) { 2306 if (noaction) 2307 printf("\tchflags nodump %s\n", tempfile); 2308 else { 2309 failed = fchflags(fd, UF_NODUMP); 2310 if (failed) { 2311 warn("log_trim: fchflags(NODUMP)"); 2312 } 2313 } 2314 } 2315 2316 /* 2317 * Note that if the real logfile still exists, and if the call 2318 * to rename() fails, then "neither the old file nor the new 2319 * file shall be changed or created" (to quote the standard). 2320 * If the call succeeds, then the file will be replaced without 2321 * any window where some other process might find that the file 2322 * did not exist. 2323 * XXX - ? It may be that for some error conditions, we could 2324 * retry by first removing the realfile and then renaming. 2325 */ 2326 if (noaction) { 2327 printf("\tchmod %o %s\n", ent->permissions, tempfile); 2328 printf("\tmv %s %s\n", tempfile, realfile); 2329 } else { 2330 failed = fchmod(fd, ent->permissions); 2331 if (failed) 2332 err(1, "can't fchmod temp file '%s'", tempfile); 2333 failed = rename(tempfile, realfile); 2334 if (failed) 2335 err(1, "can't mv %s to %s", tempfile, realfile); 2336 } 2337 2338 if (fd >= 0) 2339 close(fd); 2340 } 2341 2342 static void 2343 change_attrs(const char *fname, const struct conf_entry *ent) 2344 { 2345 int failed; 2346 2347 if (noaction) { 2348 printf("\tchmod %o %s\n", ent->permissions, fname); 2349 2350 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) 2351 printf("\tchown %u:%u %s\n", 2352 ent->uid, ent->gid, fname); 2353 2354 if (ent->flags & CE_NODUMP) 2355 printf("\tchflags nodump %s\n", fname); 2356 return; 2357 } 2358 2359 failed = chmod(fname, ent->permissions); 2360 if (failed) 2361 warn("can't chmod %s", fname); 2362 2363 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2364 failed = chown(fname, ent->uid, ent->gid); 2365 if (failed) 2366 warn("can't chown %s", fname); 2367 } 2368 2369 if (ent->flags & CE_NODUMP) { 2370 failed = chflags(fname, UF_NODUMP); 2371 if (failed) 2372 warn("can't chflags %s NODUMP", fname); 2373 } 2374 } 2375