newsyslog.c revision 130205
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: head/usr.sbin/newsyslog/newsyslog.c 130205 2004-06-07 21:18:09Z gad $"); 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 94/* 95 * Bit-values for the 'flags' parsed from a config-file entry. 96 */ 97#define CE_COMPACT 0x0001 /* Compact the achived log files with gzip. */ 98#define CE_BZCOMPACT 0x0002 /* Compact the achived log files with bzip2. */ 99#define CE_COMPACTWAIT 0x0004 /* wait until compressing one file finishes */ 100 /* before starting the next step. */ 101#define CE_BINARY 0x0008 /* Logfile is in binary, do not add status */ 102 /* messages to logfile(s) when rotating. */ 103#define CE_NOSIGNAL 0x0010 /* There is no process to signal when */ 104 /* trimming this file. */ 105#define CE_TRIMAT 0x0020 /* trim file at a specific time. */ 106#define CE_GLOB 0x0040 /* name of the log is file name pattern. */ 107#define CE_SIGNALGROUP 0x0080 /* Signal a process-group instead of a single */ 108 /* process when trimming this file. */ 109#define CE_CREATE 0x0100 /* Create the log file if it does not exist. */ 110#define CE_NODUMP 0x0200 /* Set 'nodump' on newly created log file. */ 111 112#define MIN_PID 5 /* Don't touch pids lower than this */ 113#define MAX_PID 99999 /* was lower, see /usr/include/sys/proc.h */ 114 115#define kbytes(size) (((size) + 1023) >> 10) 116 117#define DEFAULT_MARKER "<default>" 118#define DEBUG_MARKER "<debug>" 119 120struct conf_entry { 121 char *log; /* Name of the log */ 122 char *pid_file; /* PID file */ 123 char *r_reason; /* The reason this file is being rotated */ 124 int firstcreate; /* Creating log for the first time (-C). */ 125 int rotate; /* Non-zero if this file should be rotated */ 126 int fsize; /* size found for the log file */ 127 uid_t uid; /* Owner of log */ 128 gid_t gid; /* Group of log */ 129 int numlogs; /* Number of logs to keep */ 130 int trsize; /* Size cutoff to trigger trimming the log */ 131 int hours; /* Hours between log trimming */ 132 struct ptime_data *trim_at; /* Specific time to do trimming */ 133 int permissions; /* File permissions on the log */ 134 int flags; /* CE_COMPACT, CE_BZCOMPACT, CE_BINARY */ 135 int sig; /* Signal to send */ 136 int def_cfg; /* Using the <default> rule for this file */ 137 struct conf_entry *next;/* Linked list pointer */ 138}; 139 140struct sigwork_entry { 141 SLIST_ENTRY(sigwork_entry) sw_nextp; 142 int sw_signum; /* the signal to send */ 143 int sw_pidok; /* true if pid value is valid */ 144 pid_t sw_pid; /* the process id from the PID file */ 145 const char *sw_pidtype; /* "daemon" or "process group" */ 146 char sw_fname[1]; /* file the PID was read from */ 147}; 148 149struct zipwork_entry { 150 SLIST_ENTRY(zipwork_entry) zw_nextp; 151 const struct conf_entry *zw_conf; /* for chown/perm/flag info */ 152 const struct sigwork_entry *zw_swork; /* to know success of signal */ 153 int zw_fsize; /* size of the file to compress */ 154 char zw_fname[1]; /* the file to compress */ 155}; 156 157typedef enum { 158 FREE_ENT, KEEP_ENT 159} fk_entry; 160 161SLIST_HEAD(swlisthead, sigwork_entry) swhead = SLIST_HEAD_INITIALIZER(swhead); 162SLIST_HEAD(zwlisthead, zipwork_entry) zwhead = SLIST_HEAD_INITIALIZER(zwhead); 163 164int dbg_at_times; /* -D Show details of 'trim_at' code */ 165int dbg_new_order; /* -D Try the 'neworder' of doing the work */ 166 167int archtodir = 0; /* Archive old logfiles to other directory */ 168int createlogs; /* Create (non-GLOB) logfiles which do not */ 169 /* already exist. 1=='for entries with */ 170 /* C flag', 2=='for all entries'. */ 171int verbose = 0; /* Print out what's going on */ 172int needroot = 1; /* Root privs are necessary */ 173int noaction = 0; /* Don't do anything, just show it */ 174int nosignal; /* Do not send any signals */ 175int force = 0; /* Force the trim no matter what */ 176int rotatereq = 0; /* -R = Always rotate the file(s) as given */ 177 /* on the command (this also requires */ 178 /* that a list of files *are* given on */ 179 /* the run command). */ 180char *requestor; /* The name given on a -R request */ 181char *archdirname; /* Directory path to old logfiles archive */ 182const char *conf; /* Configuration file to use */ 183 184struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */ 185struct ptime_data *timenow; /* The time to use for checking at-fields */ 186 187char hostname[MAXHOSTNAMELEN]; /* hostname */ 188char daytime[16]; /* The current time in human readable form, 189 * used for rotation-tracking messages. */ 190 191static struct conf_entry *get_worklist(char **files); 192static void parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p, 193 struct conf_entry **glob_p, struct conf_entry **defconf_p); 194static char *sob(char *p); 195static char *son(char *p); 196static int isnumberstr(const char *); 197static char *missing_field(char *p, char *errline); 198static void change_attrs(const char *, const struct conf_entry *); 199static fk_entry do_entry(struct conf_entry *); 200static fk_entry do_rotate(const struct conf_entry *); 201#ifdef TRY_NEWORDER 202static void do_sigwork(struct sigwork_entry *); 203static void do_zipwork(struct zipwork_entry *); 204static struct sigwork_entry * 205 save_sigwork(const struct conf_entry *); 206static struct zipwork_entry * 207 save_zipwork(const struct conf_entry *, const struct 208 sigwork_entry *, int, const char *); 209static void set_swpid(struct sigwork_entry *, const struct conf_entry *); 210#endif 211static int sizefile(const char *); 212static void expand_globs(struct conf_entry **work_p, 213 struct conf_entry **glob_p); 214static void free_clist(struct conf_entry **firstent); 215static void free_entry(struct conf_entry *ent); 216static struct conf_entry *init_entry(const char *fname, 217 struct conf_entry *src_entry); 218static void parse_args(int argc, char **argv); 219static int parse_doption(const char *doption); 220static void usage(void); 221static int log_trim(const char *logname, const struct conf_entry *log_ent); 222static void compress_log(char *logname, int dowait); 223static void bzcompress_log(char *logname, int dowait); 224static int age_old_log(char *file); 225static int send_signal(const struct conf_entry *ent); 226static void savelog(char *from, char *to); 227static void createdir(const struct conf_entry *ent, char *dirpart); 228static void createlog(const struct conf_entry *ent); 229 230/* 231 * All the following take a parameter of 'int', but expect values in the 232 * range of unsigned char. Define wrappers which take values of type 'char', 233 * whether signed or unsigned, and ensure they end up in the right range. 234 */ 235#define isdigitch(Anychar) isdigit((u_char)(Anychar)) 236#define isprintch(Anychar) isprint((u_char)(Anychar)) 237#define isspacech(Anychar) isspace((u_char)(Anychar)) 238#define tolowerch(Anychar) tolower((u_char)(Anychar)) 239 240int 241main(int argc, char **argv) 242{ 243 fk_entry free_or_keep; 244 struct conf_entry *p, *q; 245#ifdef TRY_NEWORDER 246 struct sigwork_entry *stmp; 247 struct zipwork_entry *ztmp; 248#endif 249 250 SLIST_INIT(&swhead); 251 SLIST_INIT(&zwhead); 252 253 parse_args(argc, argv); 254 argc -= optind; 255 argv += optind; 256 257 if (needroot && getuid() && geteuid()) 258 errx(1, "must have root privs"); 259 p = q = get_worklist(argv); 260 261 /* 262 * Rotate all the files which need to be rotated. Note that 263 * some users have *hundreds* of entries in newsyslog.conf! 264 */ 265 while (p) { 266 free_or_keep = do_entry(p); 267 p = p->next; 268 if (free_or_keep == FREE_ENT) 269 free_entry(q); 270 q = p; 271 } 272 273#ifdef TRY_NEWORDER 274 /* 275 * Send signals to any processes which need a signal to tell 276 * them to close and re-open the log file(s) we have rotated. 277 * Note that zipwork_entries include pointers to these 278 * sigwork_entry's, so we can not free the entries here. 279 */ 280 if (!SLIST_EMPTY(&swhead)) { 281 if (noaction || verbose) 282 printf("Signal all daemon process(es)...\n"); 283 SLIST_FOREACH(stmp, &swhead, sw_nextp) 284 do_sigwork(stmp); 285 if (noaction) 286 printf("\tsleep 10\n"); 287 else { 288 if (verbose) 289 printf("Pause 10 seconds to allow daemon(s)" 290 " to close log file(s)\n"); 291 sleep(10); 292 } 293 } 294 /* 295 * Compress all files that we're expected to compress, now 296 * that all processes should have closed the files which 297 * have been rotated. 298 */ 299 if (!SLIST_EMPTY(&zwhead)) { 300 if (noaction || verbose) 301 printf("Compress all rotated log file(s)...\n"); 302 while (!SLIST_EMPTY(&zwhead)) { 303 ztmp = SLIST_FIRST(&zwhead); 304 do_zipwork(ztmp); 305 SLIST_REMOVE_HEAD(&zwhead, zw_nextp); 306 free(ztmp); 307 } 308 } 309 /* Now free all the sigwork entries. */ 310 while (!SLIST_EMPTY(&swhead)) { 311 stmp = SLIST_FIRST(&swhead); 312 SLIST_REMOVE_HEAD(&swhead, sw_nextp); 313 free(stmp); 314 } 315#endif /* TRY_NEWORDER */ 316 317 while (wait(NULL) > 0 || errno == EINTR) 318 ; 319 return (0); 320} 321 322static struct conf_entry * 323init_entry(const char *fname, struct conf_entry *src_entry) 324{ 325 struct conf_entry *tempwork; 326 327 if (verbose > 4) 328 printf("\t--> [creating entry for %s]\n", fname); 329 330 tempwork = malloc(sizeof(struct conf_entry)); 331 if (tempwork == NULL) 332 err(1, "malloc of conf_entry for %s", fname); 333 334 tempwork->log = strdup(fname); 335 if (tempwork->log == NULL) 336 err(1, "strdup for %s", fname); 337 338 if (src_entry != NULL) { 339 tempwork->pid_file = NULL; 340 if (src_entry->pid_file) 341 tempwork->pid_file = strdup(src_entry->pid_file); 342 tempwork->r_reason = NULL; 343 tempwork->firstcreate = 0; 344 tempwork->rotate = 0; 345 tempwork->fsize = -1; 346 tempwork->uid = src_entry->uid; 347 tempwork->gid = src_entry->gid; 348 tempwork->numlogs = src_entry->numlogs; 349 tempwork->trsize = src_entry->trsize; 350 tempwork->hours = src_entry->hours; 351 tempwork->trim_at = NULL; 352 if (src_entry->trim_at != NULL) 353 tempwork->trim_at = ptime_init(src_entry->trim_at); 354 tempwork->permissions = src_entry->permissions; 355 tempwork->flags = src_entry->flags; 356 tempwork->sig = src_entry->sig; 357 tempwork->def_cfg = src_entry->def_cfg; 358 } else { 359 /* Initialize as a "do-nothing" entry */ 360 tempwork->pid_file = NULL; 361 tempwork->r_reason = NULL; 362 tempwork->firstcreate = 0; 363 tempwork->rotate = 0; 364 tempwork->fsize = -1; 365 tempwork->uid = (uid_t)-1; 366 tempwork->gid = (gid_t)-1; 367 tempwork->numlogs = 1; 368 tempwork->trsize = -1; 369 tempwork->hours = -1; 370 tempwork->trim_at = NULL; 371 tempwork->permissions = 0; 372 tempwork->flags = 0; 373 tempwork->sig = SIGHUP; 374 tempwork->def_cfg = 0; 375 } 376 tempwork->next = NULL; 377 378 return (tempwork); 379} 380 381static void 382free_entry(struct conf_entry *ent) 383{ 384 385 if (ent == NULL) 386 return; 387 388 if (ent->log != NULL) { 389 if (verbose > 4) 390 printf("\t--> [freeing entry for %s]\n", ent->log); 391 free(ent->log); 392 ent->log = NULL; 393 } 394 395 if (ent->pid_file != NULL) { 396 free(ent->pid_file); 397 ent->pid_file = NULL; 398 } 399 400 if (ent->r_reason != NULL) { 401 free(ent->r_reason); 402 ent->r_reason = NULL; 403 } 404 405 if (ent->trim_at != NULL) { 406 ptime_free(ent->trim_at); 407 ent->trim_at = NULL; 408 } 409 410 free(ent); 411} 412 413static void 414free_clist(struct conf_entry **firstent) 415{ 416 struct conf_entry *ent, *nextent; 417 418 if (firstent == NULL) 419 return; /* There is nothing to do. */ 420 421 ent = *firstent; 422 firstent = NULL; 423 424 while (ent) { 425 nextent = ent->next; 426 free_entry(ent); 427 ent = nextent; 428 } 429} 430 431static fk_entry 432do_entry(struct conf_entry * ent) 433{ 434#define REASON_MAX 80 435 int modtime; 436 fk_entry free_or_keep; 437 double diffsecs; 438 char temp_reason[REASON_MAX]; 439 440 free_or_keep = FREE_ENT; 441 if (verbose) { 442 if (ent->flags & CE_COMPACT) 443 printf("%s <%dZ>: ", ent->log, ent->numlogs); 444 else if (ent->flags & CE_BZCOMPACT) 445 printf("%s <%dJ>: ", ent->log, ent->numlogs); 446 else 447 printf("%s <%d>: ", ent->log, ent->numlogs); 448 } 449 ent->fsize = sizefile(ent->log); 450 modtime = age_old_log(ent->log); 451 ent->rotate = 0; 452 ent->firstcreate = 0; 453 if (ent->fsize < 0) { 454 /* 455 * If either the C flag or the -C option was specified, 456 * and if we won't be creating the file, then have the 457 * verbose message include a hint as to why the file 458 * will not be created. 459 */ 460 temp_reason[0] = '\0'; 461 if (createlogs > 1) 462 ent->firstcreate = 1; 463 else if ((ent->flags & CE_CREATE) && createlogs) 464 ent->firstcreate = 1; 465 else if (ent->flags & CE_CREATE) 466 strncpy(temp_reason, " (no -C option)", REASON_MAX); 467 else if (createlogs) 468 strncpy(temp_reason, " (no C flag)", REASON_MAX); 469 470 if (ent->firstcreate) { 471 if (verbose) 472 printf("does not exist -> will create.\n"); 473 createlog(ent); 474 } else if (verbose) { 475 printf("does not exist, skipped%s.\n", temp_reason); 476 } 477 } else { 478 if (ent->flags & CE_TRIMAT && !force && !rotatereq) { 479 diffsecs = ptimeget_diff(timenow, ent->trim_at); 480 if (diffsecs < 0.0) { 481 /* trim_at is some time in the future. */ 482 if (verbose) { 483 ptime_adjust4dst(ent->trim_at, 484 timenow); 485 printf("--> will trim at %s", 486 ptimeget_ctime(ent->trim_at)); 487 } 488 return (free_or_keep); 489 } else if (diffsecs >= 3600.0) { 490 /* 491 * trim_at is more than an hour in the past, 492 * so find the next valid trim_at time, and 493 * tell the user what that will be. 494 */ 495 if (verbose && dbg_at_times) 496 printf("\n\t--> prev trim at %s\t", 497 ptimeget_ctime(ent->trim_at)); 498 if (verbose) { 499 ptimeset_nxtime(ent->trim_at); 500 printf("--> will trim at %s", 501 ptimeget_ctime(ent->trim_at)); 502 } 503 return (free_or_keep); 504 } else if (verbose && noaction && dbg_at_times) { 505 /* 506 * If we are just debugging at-times, then 507 * a detailed message is helpful. Also 508 * skip "doing" any commands, since they 509 * would all be turned off by no-action. 510 */ 511 printf("\n\t--> timematch at %s", 512 ptimeget_ctime(ent->trim_at)); 513 return (free_or_keep); 514 } else if (verbose && ent->hours <= 0) { 515 printf("--> time is up\n"); 516 } 517 } 518 if (verbose && (ent->trsize > 0)) 519 printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize); 520 if (verbose && (ent->hours > 0)) 521 printf(" age (hr): %d [%d] ", modtime, ent->hours); 522 523 /* 524 * Figure out if this logfile needs to be rotated. 525 */ 526 temp_reason[0] = '\0'; 527 if (rotatereq) { 528 ent->rotate = 1; 529 snprintf(temp_reason, REASON_MAX, " due to -R from %s", 530 requestor); 531 } else if (force) { 532 ent->rotate = 1; 533 snprintf(temp_reason, REASON_MAX, " due to -F request"); 534 } else if ((ent->trsize > 0) && (ent->fsize >= ent->trsize)) { 535 ent->rotate = 1; 536 snprintf(temp_reason, REASON_MAX, " due to size>%dK", 537 ent->trsize); 538 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) { 539 ent->rotate = 1; 540 } else if ((ent->hours > 0) && ((modtime >= ent->hours) || 541 (modtime < 0))) { 542 ent->rotate = 1; 543 } 544 545 /* 546 * If the file needs to be rotated, then rotate it. 547 */ 548 if (ent->rotate) { 549 if (temp_reason[0] != '\0') 550 ent->r_reason = strdup(temp_reason); 551 if (verbose) 552 printf("--> trimming log....\n"); 553 if (noaction && !verbose) { 554 if (ent->flags & CE_COMPACT) 555 printf("%s <%dZ>: trimming\n", 556 ent->log, ent->numlogs); 557 else if (ent->flags & CE_BZCOMPACT) 558 printf("%s <%dJ>: trimming\n", 559 ent->log, ent->numlogs); 560 else 561 printf("%s <%d>: trimming\n", 562 ent->log, ent->numlogs); 563 } 564 free_or_keep = do_rotate(ent); 565 } else { 566 if (verbose) 567 printf("--> skipping\n"); 568 } 569 } 570 return (free_or_keep); 571#undef REASON_MAX 572} 573 574/* Send a signal to the pid specified by pidfile */ 575static int 576send_signal(const struct conf_entry *ent) 577{ 578 pid_t target_pid; 579 int did_notify; 580 FILE *f; 581 long minok, maxok, rval; 582 const char *target_name; 583 char *endp, *linep, line[BUFSIZ]; 584 585 did_notify = 0; 586 f = fopen(ent->pid_file, "r"); 587 if (f == NULL) { 588 warn("can't open pid file: %s", ent->pid_file); 589 return (did_notify); 590 /* NOTREACHED */ 591 } 592 593 if (fgets(line, BUFSIZ, f) == NULL) { 594 /* 595 * XXX - If the pid file is empty, is that really a 596 * problem? Wouldn't that mean that the process 597 * has shut down? In that case there would be no 598 * problem with compressing the rotated log file. 599 */ 600 if (feof(f)) 601 warnx("pid file is empty: %s", ent->pid_file); 602 else 603 warn("can't read from pid file: %s", ent->pid_file); 604 (void) fclose(f); 605 return (did_notify); 606 /* NOTREACHED */ 607 } 608 (void) fclose(f); 609 610 target_name = "daemon"; 611 minok = MIN_PID; 612 maxok = MAX_PID; 613 if (ent->flags & CE_SIGNALGROUP) { 614 /* 615 * If we are expected to signal a process-group when 616 * rotating this logfile, then the value read in should 617 * be the negative of a valid process ID. 618 */ 619 target_name = "process-group"; 620 minok = -MAX_PID; 621 maxok = -MIN_PID; 622 } 623 624 errno = 0; 625 linep = line; 626 while (*linep == ' ') 627 linep++; 628 rval = strtol(linep, &endp, 10); 629 if (*endp != '\0' && !isspacech(*endp)) { 630 warnx("pid file does not start with a valid number: %s", 631 ent->pid_file); 632 rval = 0; 633 } else if (rval < minok || rval > maxok) { 634 warnx("bad value '%ld' for process number in %s", 635 rval, ent->pid_file); 636 if (verbose) 637 warnx("\t(expecting value between %ld and %ld)", 638 minok, maxok); 639 rval = 0; 640 } 641 if (rval == 0) { 642 return (did_notify); 643 /* NOTREACHED */ 644 } 645 646 target_pid = rval; 647 648 if (noaction) { 649 did_notify = 1; 650 printf("\tkill -%d %d\n", ent->sig, (int) target_pid); 651 } else if (kill(target_pid, ent->sig)) { 652 /* 653 * XXX - Iff the error was "no such process", should that 654 * really be an error for us? Perhaps the process 655 * is already gone, in which case there would be no 656 * problem with compressing the rotated log file. 657 */ 658 warn("can't notify %s, pid %d", target_name, 659 (int) target_pid); 660 } else { 661 did_notify = 1; 662 if (verbose) 663 printf("%s pid %d notified\n", target_name, 664 (int) target_pid); 665 } 666 667 return (did_notify); 668} 669 670static void 671parse_args(int argc, char **argv) 672{ 673 int ch; 674 char *p; 675 676 timenow = ptime_init(NULL); 677 ptimeset_time(timenow, time(NULL)); 678 (void)strncpy(daytime, ptimeget_ctime(timenow) + 4, 15); 679 daytime[15] = '\0'; 680 681 /* Let's get our hostname */ 682 (void)gethostname(hostname, sizeof(hostname)); 683 684 /* Truncate domain */ 685 if ((p = strchr(hostname, '.')) != NULL) 686 *p = '\0'; 687 688 /* Parse command line options. */ 689 while ((ch = getopt(argc, argv, "a:f:nrsvCD:FR:")) != -1) 690 switch (ch) { 691 case 'a': 692 archtodir++; 693 archdirname = optarg; 694 break; 695 case 'f': 696 conf = optarg; 697 break; 698 case 'n': 699 noaction++; 700 break; 701 case 'r': 702 needroot = 0; 703 break; 704 case 's': 705 nosignal = 1; 706 break; 707 case 'v': 708 verbose++; 709 break; 710 case 'C': 711 /* Useful for things like rc.diskless... */ 712 createlogs++; 713 break; 714 case 'D': 715 /* 716 * Set some debugging option. The specific option 717 * depends on the value of optarg. These options 718 * may come and go without notice or documentation. 719 */ 720 if (parse_doption(optarg)) 721 break; 722 usage(); 723 /* NOTREACHED */ 724 case 'F': 725 force++; 726 break; 727 case 'R': 728 rotatereq++; 729 requestor = strdup(optarg); 730 break; 731 case 'm': /* Used by OpenBSD for "monitor mode" */ 732 default: 733 usage(); 734 /* NOTREACHED */ 735 } 736 737 if (rotatereq) { 738 if (optind == argc) { 739 warnx("At least one filename must be given when -R is specified."); 740 usage(); 741 /* NOTREACHED */ 742 } 743 /* Make sure "requestor" value is safe for a syslog message. */ 744 for (p = requestor; *p != '\0'; p++) { 745 if (!isprintch(*p) && (*p != '\t')) 746 *p = '.'; 747 } 748 } 749 750 if (dbg_timenow) { 751 /* 752 * Note that the 'daytime' variable is not changed. 753 * That is only used in messages that track when a 754 * logfile is rotated, and if a file *is* rotated, 755 * then it will still rotated at the "real now" time. 756 */ 757 ptime_free(timenow); 758 timenow = dbg_timenow; 759 fprintf(stderr, "Debug: Running as if TimeNow is %s", 760 ptimeget_ctime(dbg_timenow)); 761 } 762 763} 764 765/* 766 * These debugging options are mainly meant for developer use, such 767 * as writing regression-tests. They would not be needed by users 768 * during normal operation of newsyslog... 769 */ 770static int 771parse_doption(const char *doption) 772{ 773 const char TN[] = "TN="; 774 int res; 775 776 if (strncmp(doption, TN, sizeof(TN) - 1) == 0) { 777 /* 778 * The "TimeNow" debugging option. This might be off 779 * by an hour when crossing a timezone change. 780 */ 781 dbg_timenow = ptime_init(NULL); 782 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601, 783 time(NULL), doption + sizeof(TN) - 1); 784 if (res == -2) { 785 warnx("Non-existent time specified on -D %s", doption); 786 return (0); /* failure */ 787 } else if (res < 0) { 788 warnx("Malformed time given on -D %s", doption); 789 return (0); /* failure */ 790 } 791 return (1); /* successfully parsed */ 792 793 } 794 795 if (strcmp(doption, "ats") == 0) { 796 dbg_at_times++; 797 return (1); /* successfully parsed */ 798 } 799 800 if (strcmp(doption, "neworder") == 0) { 801#ifdef TRY_NEWORDER 802 dbg_new_order++; 803#else 804 warnx("NOTE: The code for 'neworder' was not compiled in."); 805#endif 806 return (1); /* successfully parsed */ 807 } 808 if (strcmp(doption, "oldorder") == 0) { 809#ifdef TRY_NEWORDER 810 dbg_new_order = 0; 811#else 812 warnx("NOTE: The code for 'neworder' was not compiled in."); 813#endif 814 return (1); /* successfully parsed */ 815 } 816 817 warnx("Unknown -D (debug) option: '%s'", doption); 818 return (0); /* failure */ 819} 820 821static void 822usage(void) 823{ 824 825 fprintf(stderr, 826 "usage: newsyslog [-CFnrsv] [-a directory] [-f config-file]\n" 827 " [ [-R requestor] filename ... ]\n"); 828 exit(1); 829} 830 831/* 832 * Parse a configuration file and return a linked list of all the logs 833 * which should be processed. 834 */ 835static struct conf_entry * 836get_worklist(char **files) 837{ 838 FILE *f; 839 const char *fname; 840 char **given; 841 struct conf_entry *defconf, *dupent, *ent, *firstnew; 842 struct conf_entry *globlist, *lastnew, *worklist; 843 int gmatch, fnres; 844 845 defconf = globlist = worklist = NULL; 846 847 fname = conf; 848 if (fname == NULL) 849 fname = _PATH_CONF; 850 851 if (strcmp(fname, "-") != 0) 852 f = fopen(fname, "r"); 853 else { 854 f = stdin; 855 fname = "<stdin>"; 856 } 857 if (!f) 858 err(1, "%s", conf); 859 860 parse_file(f, fname, &worklist, &globlist, &defconf); 861 (void) fclose(f); 862 863 /* 864 * All config-file information has been read in and turned into 865 * a worklist and a globlist. If there were no specific files 866 * given on the run command, then the only thing left to do is to 867 * call a routine which finds all files matched by the globlist 868 * and adds them to the worklist. Then return the worklist. 869 */ 870 if (*files == NULL) { 871 expand_globs(&worklist, &globlist); 872 free_clist(&globlist); 873 if (defconf != NULL) 874 free_entry(defconf); 875 return (worklist); 876 /* NOTREACHED */ 877 } 878 879 /* 880 * If newsyslog was given a specific list of files to process, 881 * it may be that some of those files were not listed in any 882 * config file. Those unlisted files should get the default 883 * rotation action. First, create the default-rotation action 884 * if none was found in a system config file. 885 */ 886 if (defconf == NULL) { 887 defconf = init_entry(DEFAULT_MARKER, NULL); 888 defconf->numlogs = 3; 889 defconf->trsize = 50; 890 defconf->permissions = S_IRUSR|S_IWUSR; 891 } 892 893 /* 894 * If newsyslog was run with a list of specific filenames, 895 * then create a new worklist which has only those files in 896 * it, picking up the rotation-rules for those files from 897 * the original worklist. 898 * 899 * XXX - Note that this will copy multiple rules for a single 900 * logfile, if multiple entries are an exact match for 901 * that file. That matches the historic behavior, but do 902 * we want to continue to allow it? If so, it should 903 * probably be handled more intelligently. 904 */ 905 firstnew = lastnew = NULL; 906 for (given = files; *given; ++given) { 907 /* 908 * First try to find exact-matches for this given file. 909 */ 910 gmatch = 0; 911 for (ent = worklist; ent; ent = ent->next) { 912 if (strcmp(ent->log, *given) == 0) { 913 gmatch++; 914 dupent = init_entry(*given, ent); 915 if (!firstnew) 916 firstnew = dupent; 917 else 918 lastnew->next = dupent; 919 lastnew = dupent; 920 } 921 } 922 if (gmatch) { 923 if (verbose > 2) 924 printf("\t+ Matched entry %s\n", *given); 925 continue; 926 } 927 928 /* 929 * There was no exact-match for this given file, so look 930 * for a "glob" entry which does match. 931 */ 932 gmatch = 0; 933 if (verbose > 2 && globlist != NULL) 934 printf("\t+ Checking globs for %s\n", *given); 935 for (ent = globlist; ent; ent = ent->next) { 936 fnres = fnmatch(ent->log, *given, FNM_PATHNAME); 937 if (verbose > 2) 938 printf("\t+ = %d for pattern %s\n", fnres, 939 ent->log); 940 if (fnres == 0) { 941 gmatch++; 942 dupent = init_entry(*given, ent); 943 if (!firstnew) 944 firstnew = dupent; 945 else 946 lastnew->next = dupent; 947 lastnew = dupent; 948 /* This new entry is not a glob! */ 949 dupent->flags &= ~CE_GLOB; 950 /* Only allow a match to one glob-entry */ 951 break; 952 } 953 } 954 if (gmatch) { 955 if (verbose > 2) 956 printf("\t+ Matched %s via %s\n", *given, 957 ent->log); 958 continue; 959 } 960 961 /* 962 * This given file was not found in any config file, so 963 * add a worklist item based on the default entry. 964 */ 965 if (verbose > 2) 966 printf("\t+ No entry matched %s (will use %s)\n", 967 *given, DEFAULT_MARKER); 968 dupent = init_entry(*given, defconf); 969 if (!firstnew) 970 firstnew = dupent; 971 else 972 lastnew->next = dupent; 973 /* Mark that it was *not* found in a config file */ 974 dupent->def_cfg = 1; 975 lastnew = dupent; 976 } 977 978 /* 979 * Free all the entries in the original work list, the list of 980 * glob entries, and the default entry. 981 */ 982 free_clist(&worklist); 983 free_clist(&globlist); 984 free_entry(defconf); 985 986 /* And finally, return a worklist which matches the given files. */ 987 return (firstnew); 988} 989 990/* 991 * Expand the list of entries with filename patterns, and add all files 992 * which match those glob-entries onto the worklist. 993 */ 994static void 995expand_globs(struct conf_entry **work_p, struct conf_entry **glob_p) 996{ 997 int gmatch, gres, i; 998 char *mfname; 999 struct conf_entry *dupent, *ent, *firstmatch, *globent; 1000 struct conf_entry *lastmatch; 1001 glob_t pglob; 1002 struct stat st_fm; 1003 1004 if ((glob_p == NULL) || (*glob_p == NULL)) 1005 return; /* There is nothing to do. */ 1006 1007 /* 1008 * The worklist contains all fully-specified (non-GLOB) names. 1009 * 1010 * Now expand the list of filename-pattern (GLOB) entries into 1011 * a second list, which (by definition) will only match files 1012 * that already exist. Do not add a glob-related entry for any 1013 * file which already exists in the fully-specified list. 1014 */ 1015 firstmatch = lastmatch = NULL; 1016 for (globent = *glob_p; globent; globent = globent->next) { 1017 1018 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob); 1019 if (gres != 0) { 1020 warn("cannot expand pattern (%d): %s", gres, 1021 globent->log); 1022 continue; 1023 } 1024 1025 if (verbose > 2) 1026 printf("\t+ Expanding pattern %s\n", globent->log); 1027 for (i = 0; i < pglob.gl_matchc; i++) { 1028 mfname = pglob.gl_pathv[i]; 1029 1030 /* See if this file already has a specific entry. */ 1031 gmatch = 0; 1032 for (ent = *work_p; ent; ent = ent->next) { 1033 if (strcmp(mfname, ent->log) == 0) { 1034 gmatch++; 1035 break; 1036 } 1037 } 1038 if (gmatch) 1039 continue; 1040 1041 /* Make sure the named matched is a file. */ 1042 gres = lstat(mfname, &st_fm); 1043 if (gres != 0) { 1044 /* Error on a file that glob() matched?!? */ 1045 warn("Skipping %s - lstat() error", mfname); 1046 continue; 1047 } 1048 if (!S_ISREG(st_fm.st_mode)) { 1049 /* We only rotate files! */ 1050 if (verbose > 2) 1051 printf("\t+ . skipping %s (!file)\n", 1052 mfname); 1053 continue; 1054 } 1055 1056 if (verbose > 2) 1057 printf("\t+ . add file %s\n", mfname); 1058 dupent = init_entry(mfname, globent); 1059 if (!firstmatch) 1060 firstmatch = dupent; 1061 else 1062 lastmatch->next = dupent; 1063 lastmatch = dupent; 1064 /* This new entry is not a glob! */ 1065 dupent->flags &= ~CE_GLOB; 1066 } 1067 globfree(&pglob); 1068 if (verbose > 2) 1069 printf("\t+ Done with pattern %s\n", globent->log); 1070 } 1071 1072 /* Add the list of matched files to the end of the worklist. */ 1073 if (!*work_p) 1074 *work_p = firstmatch; 1075 else { 1076 ent = *work_p; 1077 while (ent->next) 1078 ent = ent->next; 1079 ent->next = firstmatch; 1080 } 1081 1082} 1083 1084/* 1085 * Parse a configuration file and update a linked list of all the logs to 1086 * process. 1087 */ 1088static void 1089parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p, 1090 struct conf_entry **glob_p, struct conf_entry **defconf_p) 1091{ 1092 char line[BUFSIZ], *parse, *q; 1093 char *cp, *errline, *group; 1094 struct conf_entry *lastglob, *lastwork, *working; 1095 struct passwd *pwd; 1096 struct group *grp; 1097 int eol, ptm_opts, res, special; 1098 1099 /* 1100 * XXX - for now, assume that only one config file will be read, 1101 * ie, this routine is only called one time. 1102 */ 1103 lastglob = lastwork = NULL; 1104 1105 errline = NULL; 1106 while (fgets(line, BUFSIZ, cf)) { 1107 if ((line[0] == '\n') || (line[0] == '#') || 1108 (strlen(line) == 0)) 1109 continue; 1110 if (errline != NULL) 1111 free(errline); 1112 errline = strdup(line); 1113 for (cp = line + 1; *cp != '\0'; cp++) { 1114 if (*cp != '#') 1115 continue; 1116 if (*(cp - 1) == '\\') { 1117 strcpy(cp - 1, cp); 1118 cp--; 1119 continue; 1120 } 1121 *cp = '\0'; 1122 break; 1123 } 1124 1125 q = parse = missing_field(sob(line), errline); 1126 parse = son(line); 1127 if (!*parse) 1128 errx(1, "malformed line (missing fields):\n%s", 1129 errline); 1130 *parse = '\0'; 1131 1132 /* 1133 * Allow people to set debug options via the config file. 1134 * (NOTE: debug optons are undocumented, and may disappear 1135 * at any time, etc). 1136 */ 1137 if (strcasecmp(DEBUG_MARKER, q) == 0) { 1138 q = parse = missing_field(sob(++parse), errline); 1139 parse = son(parse); 1140 if (!*parse) 1141 warnx("debug line specifies no option:\n%s", 1142 errline); 1143 else { 1144 *parse = '\0'; 1145 parse_doption(q); 1146 } 1147 continue; 1148 } 1149 1150 special = 0; 1151 working = init_entry(q, NULL); 1152 if (strcasecmp(DEFAULT_MARKER, q) == 0) { 1153 special = 1; 1154 if (defconf_p == NULL) { 1155 warnx("Ignoring entry for %s in %s!", q, 1156 cfname); 1157 free_entry(working); 1158 continue; 1159 } else if (*defconf_p != NULL) { 1160 warnx("Ignoring duplicate entry for %s!", q); 1161 free_entry(working); 1162 continue; 1163 } 1164 *defconf_p = working; 1165 } 1166 1167 q = parse = missing_field(sob(++parse), errline); 1168 parse = son(parse); 1169 if (!*parse) 1170 errx(1, "malformed line (missing fields):\n%s", 1171 errline); 1172 *parse = '\0'; 1173 if ((group = strchr(q, ':')) != NULL || 1174 (group = strrchr(q, '.')) != NULL) { 1175 *group++ = '\0'; 1176 if (*q) { 1177 if (!(isnumberstr(q))) { 1178 if ((pwd = getpwnam(q)) == NULL) 1179 errx(1, 1180 "error in config file; unknown user:\n%s", 1181 errline); 1182 working->uid = pwd->pw_uid; 1183 } else 1184 working->uid = atoi(q); 1185 } else 1186 working->uid = (uid_t)-1; 1187 1188 q = group; 1189 if (*q) { 1190 if (!(isnumberstr(q))) { 1191 if ((grp = getgrnam(q)) == NULL) 1192 errx(1, 1193 "error in config file; unknown group:\n%s", 1194 errline); 1195 working->gid = grp->gr_gid; 1196 } else 1197 working->gid = atoi(q); 1198 } else 1199 working->gid = (gid_t)-1; 1200 1201 q = parse = missing_field(sob(++parse), errline); 1202 parse = son(parse); 1203 if (!*parse) 1204 errx(1, "malformed line (missing fields):\n%s", 1205 errline); 1206 *parse = '\0'; 1207 } else { 1208 working->uid = (uid_t)-1; 1209 working->gid = (gid_t)-1; 1210 } 1211 1212 if (!sscanf(q, "%o", &working->permissions)) 1213 errx(1, "error in config file; bad permissions:\n%s", 1214 errline); 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 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0) 1223 errx(1, "error in config file; bad value for count of logs to save:\n%s", 1224 errline); 1225 1226 q = parse = missing_field(sob(++parse), errline); 1227 parse = son(parse); 1228 if (!*parse) 1229 errx(1, "malformed line (missing fields):\n%s", 1230 errline); 1231 *parse = '\0'; 1232 if (isdigitch(*q)) 1233 working->trsize = atoi(q); 1234 else if (strcmp(q, "*") == 0) 1235 working->trsize = -1; 1236 else { 1237 warnx("Invalid value of '%s' for 'size' in line:\n%s", 1238 q, errline); 1239 working->trsize = -1; 1240 } 1241 1242 working->flags = 0; 1243 q = parse = missing_field(sob(++parse), errline); 1244 parse = son(parse); 1245 eol = !*parse; 1246 *parse = '\0'; 1247 { 1248 char *ep; 1249 u_long ul; 1250 1251 ul = strtoul(q, &ep, 10); 1252 if (ep == q) 1253 working->hours = 0; 1254 else if (*ep == '*') 1255 working->hours = -1; 1256 else if (ul > INT_MAX) 1257 errx(1, "interval is too large:\n%s", errline); 1258 else 1259 working->hours = ul; 1260 1261 if (*ep == '\0' || strcmp(ep, "*") == 0) 1262 goto no_trimat; 1263 if (*ep != '@' && *ep != '$') 1264 errx(1, "malformed interval/at:\n%s", errline); 1265 1266 working->flags |= CE_TRIMAT; 1267 working->trim_at = ptime_init(NULL); 1268 ptm_opts = PTM_PARSE_ISO8601; 1269 if (*ep == '$') 1270 ptm_opts = PTM_PARSE_DWM; 1271 ptm_opts |= PTM_PARSE_MATCHDOM; 1272 res = ptime_relparse(working->trim_at, ptm_opts, 1273 ptimeget_secs(timenow), ep + 1); 1274 if (res == -2) 1275 errx(1, "nonexistent time for 'at' value:\n%s", 1276 errline); 1277 else if (res < 0) 1278 errx(1, "malformed 'at' value:\n%s", errline); 1279 } 1280no_trimat: 1281 1282 if (eol) 1283 q = NULL; 1284 else { 1285 q = parse = sob(++parse); /* Optional field */ 1286 parse = son(parse); 1287 if (!*parse) 1288 eol = 1; 1289 *parse = '\0'; 1290 } 1291 1292 for (; q && *q && !isspacech(*q); q++) { 1293 switch (tolowerch(*q)) { 1294 case 'b': 1295 working->flags |= CE_BINARY; 1296 break; 1297 case 'c': 1298 /* 1299 * XXX - Ick! Ugly! Remove ASAP! 1300 * We want `c' and `C' for "create". But we 1301 * will temporarily treat `c' as `g', because 1302 * FreeBSD releases <= 4.8 have a typo of 1303 * checking ('G' || 'c') for CE_GLOB. 1304 */ 1305 if (*q == 'c') { 1306 warnx("Assuming 'g' for 'c' in flags for line:\n%s", 1307 errline); 1308 warnx("The 'c' flag will eventually mean 'CREATE'"); 1309 working->flags |= CE_GLOB; 1310 break; 1311 } 1312 working->flags |= CE_CREATE; 1313 break; 1314 case 'd': 1315 working->flags |= CE_NODUMP; 1316 break; 1317 case 'g': 1318 working->flags |= CE_GLOB; 1319 break; 1320 case 'j': 1321 working->flags |= CE_BZCOMPACT; 1322 break; 1323 case 'n': 1324 working->flags |= CE_NOSIGNAL; 1325 break; 1326 case 'u': 1327 working->flags |= CE_SIGNALGROUP; 1328 break; 1329 case 'w': 1330 working->flags |= CE_COMPACTWAIT; 1331 break; 1332 case 'z': 1333 working->flags |= CE_COMPACT; 1334 break; 1335 case '-': 1336 break; 1337 case 'f': /* Used by OpenBSD for "CE_FOLLOW" */ 1338 case 'm': /* Used by OpenBSD for "CE_MONITOR" */ 1339 case 'p': /* Used by NetBSD for "CE_PLAIN0" */ 1340 default: 1341 errx(1, "illegal flag in config file -- %c", 1342 *q); 1343 } 1344 } 1345 1346 if (eol) 1347 q = NULL; 1348 else { 1349 q = parse = sob(++parse); /* Optional field */ 1350 parse = son(parse); 1351 if (!*parse) 1352 eol = 1; 1353 *parse = '\0'; 1354 } 1355 1356 working->pid_file = NULL; 1357 if (q && *q) { 1358 if (*q == '/') 1359 working->pid_file = strdup(q); 1360 else if (isdigit(*q)) 1361 goto got_sig; 1362 else 1363 errx(1, 1364 "illegal pid file or signal number in config file:\n%s", 1365 errline); 1366 } 1367 if (eol) 1368 q = NULL; 1369 else { 1370 q = parse = sob(++parse); /* Optional field */ 1371 *(parse = son(parse)) = '\0'; 1372 } 1373 1374 working->sig = SIGHUP; 1375 if (q && *q) { 1376 if (isdigit(*q)) { 1377 got_sig: 1378 working->sig = atoi(q); 1379 } else { 1380 err_sig: 1381 errx(1, 1382 "illegal signal number in config file:\n%s", 1383 errline); 1384 } 1385 if (working->sig < 1 || working->sig >= NSIG) 1386 goto err_sig; 1387 } 1388 1389 /* 1390 * Finish figuring out what pid-file to use (if any) in 1391 * later processing if this logfile needs to be rotated. 1392 */ 1393 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) { 1394 /* 1395 * This config-entry specified 'n' for nosignal, 1396 * see if it also specified an explicit pid_file. 1397 * This would be a pretty pointless combination. 1398 */ 1399 if (working->pid_file != NULL) { 1400 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s", 1401 working->pid_file, errline); 1402 free(working->pid_file); 1403 working->pid_file = NULL; 1404 } 1405 } else if (working->pid_file == NULL) { 1406 /* 1407 * This entry did not specify the 'n' flag, which 1408 * means it should signal syslogd unless it had 1409 * specified some other pid-file (and obviously the 1410 * syslog pid-file will not be for a process-group). 1411 * Also, we should only try to notify syslog if we 1412 * are root. 1413 */ 1414 if (working->flags & CE_SIGNALGROUP) { 1415 warnx("Ignoring flag 'U' in line:\n%s", 1416 errline); 1417 working->flags &= ~CE_SIGNALGROUP; 1418 } 1419 if (needroot) 1420 working->pid_file = strdup(_PATH_SYSLOGPID); 1421 } 1422 1423 /* 1424 * Add this entry to the appropriate list of entries, unless 1425 * it was some kind of special entry (eg: <default>). 1426 */ 1427 if (special) { 1428 ; /* Do not add to any list */ 1429 } else if (working->flags & CE_GLOB) { 1430 if (!*glob_p) 1431 *glob_p = working; 1432 else 1433 lastglob->next = working; 1434 lastglob = working; 1435 } else { 1436 if (!*work_p) 1437 *work_p = working; 1438 else 1439 lastwork->next = working; 1440 lastwork = working; 1441 } 1442 } 1443 if (errline != NULL) 1444 free(errline); 1445} 1446 1447static char * 1448missing_field(char *p, char *errline) 1449{ 1450 1451 if (!p || !*p) 1452 errx(1, "missing field in config file:\n%s", errline); 1453 return (p); 1454} 1455 1456static fk_entry 1457do_rotate(const struct conf_entry *ent) 1458{ 1459 char dirpart[MAXPATHLEN], namepart[MAXPATHLEN]; 1460 char file1[MAXPATHLEN], file2[MAXPATHLEN]; 1461 char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN]; 1462 char jfile1[MAXPATHLEN]; 1463 int flags, notified, need_notification, numlogs_c; 1464 fk_entry free_or_keep; 1465 struct stat st; 1466 1467 flags = ent->flags; 1468 free_or_keep = FREE_ENT; 1469 1470 if (archtodir) { 1471 char *p; 1472 1473 /* build complete name of archive directory into dirpart */ 1474 if (*archdirname == '/') { /* absolute */ 1475 strlcpy(dirpart, archdirname, sizeof(dirpart)); 1476 } else { /* relative */ 1477 /* get directory part of logfile */ 1478 strlcpy(dirpart, ent->log, sizeof(dirpart)); 1479 if ((p = rindex(dirpart, '/')) == NULL) 1480 dirpart[0] = '\0'; 1481 else 1482 *(p + 1) = '\0'; 1483 strlcat(dirpart, archdirname, sizeof(dirpart)); 1484 } 1485 1486 /* check if archive directory exists, if not, create it */ 1487 if (lstat(dirpart, &st)) 1488 createdir(ent, dirpart); 1489 1490 /* get filename part of logfile */ 1491 if ((p = rindex(ent->log, '/')) == NULL) 1492 strlcpy(namepart, ent->log, sizeof(namepart)); 1493 else 1494 strlcpy(namepart, p + 1, sizeof(namepart)); 1495 1496 /* name of oldest log */ 1497 (void) snprintf(file1, sizeof(file1), "%s/%s.%d", dirpart, 1498 namepart, ent->numlogs); 1499 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1, 1500 COMPRESS_POSTFIX); 1501 snprintf(jfile1, sizeof(jfile1), "%s%s", file1, 1502 BZCOMPRESS_POSTFIX); 1503 } else { 1504 /* name of oldest log */ 1505 (void) snprintf(file1, sizeof(file1), "%s.%d", ent->log, 1506 ent->numlogs); 1507 (void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1, 1508 COMPRESS_POSTFIX); 1509 snprintf(jfile1, sizeof(jfile1), "%s%s", file1, 1510 BZCOMPRESS_POSTFIX); 1511 } 1512 1513 if (noaction) { 1514 printf("\trm -f %s\n", file1); 1515 printf("\trm -f %s\n", zfile1); 1516 printf("\trm -f %s\n", jfile1); 1517 } else { 1518 (void) unlink(file1); 1519 (void) unlink(zfile1); 1520 (void) unlink(jfile1); 1521 } 1522 1523 /* Move down log files */ 1524 numlogs_c = ent->numlogs; /* copy for countdown */ 1525 while (numlogs_c--) { 1526 1527 (void) strlcpy(file2, file1, sizeof(file2)); 1528 1529 if (archtodir) 1530 (void) snprintf(file1, sizeof(file1), "%s/%s.%d", 1531 dirpart, namepart, numlogs_c); 1532 else 1533 (void) snprintf(file1, sizeof(file1), "%s.%d", 1534 ent->log, numlogs_c); 1535 1536 (void) strlcpy(zfile1, file1, sizeof(zfile1)); 1537 (void) strlcpy(zfile2, file2, sizeof(zfile2)); 1538 if (lstat(file1, &st)) { 1539 (void) strlcat(zfile1, COMPRESS_POSTFIX, 1540 sizeof(zfile1)); 1541 (void) strlcat(zfile2, COMPRESS_POSTFIX, 1542 sizeof(zfile2)); 1543 if (lstat(zfile1, &st)) { 1544 strlcpy(zfile1, file1, sizeof(zfile1)); 1545 strlcpy(zfile2, file2, sizeof(zfile2)); 1546 strlcat(zfile1, BZCOMPRESS_POSTFIX, 1547 sizeof(zfile1)); 1548 strlcat(zfile2, BZCOMPRESS_POSTFIX, 1549 sizeof(zfile2)); 1550 if (lstat(zfile1, &st)) 1551 continue; 1552 } 1553 } 1554 if (noaction) 1555 printf("\tmv %s %s\n", zfile1, zfile2); 1556 else { 1557 /* XXX - Ought to be checking for failure! */ 1558 (void)rename(zfile1, zfile2); 1559 } 1560 change_attrs(zfile2, ent); 1561 } 1562 1563 if (ent->numlogs > 0) { 1564 if (noaction) { 1565 /* 1566 * Note that savelog() may succeed with using link() 1567 * for the archtodir case, but there is no good way 1568 * of knowing if it will when doing "noaction", so 1569 * here we claim that it will have to do a copy... 1570 */ 1571 if (archtodir) 1572 printf("\tcp %s %s\n", ent->log, file1); 1573 else 1574 printf("\tln %s %s\n", ent->log, file1); 1575 } else { 1576 if (!(flags & CE_BINARY)) { 1577 /* Report the trimming to the old log */ 1578 log_trim(ent->log, ent); 1579 } 1580 savelog(ent->log, file1); 1581 } 1582 change_attrs(file1, ent); 1583 } 1584 1585 /* Create the new log file and move it into place */ 1586 if (noaction) 1587 printf("Start new log...\n"); 1588 createlog(ent); 1589 1590#ifdef TRY_NEWORDER 1591 /* 1592 * Save all signalling and file-compression to be done after log 1593 * files from all entries have been rotated. This way any one 1594 * process will not be sent the same signal multiple times when 1595 * multiple log files had to be rotated. 1596 */ 1597 if (dbg_new_order) { 1598 struct sigwork_entry *swork; 1599 1600 swork = NULL; 1601 if (ent->pid_file != NULL) 1602 swork = save_sigwork(ent); 1603 if (ent->numlogs > 0 && (flags & (CE_COMPACT | CE_BZCOMPACT))) { 1604 /* 1605 * The zipwork_entry will include a pointer to this 1606 * conf_entry, so the conf_entry should not be freed. 1607 */ 1608 free_or_keep = KEEP_ENT; 1609 save_zipwork(ent, swork, ent->fsize, file1); 1610 } 1611 return (free_or_keep); 1612 } 1613#endif /* TRY_NEWORDER */ 1614 1615 /* 1616 * Find out if there is a process to signal. If nosignal (-s) was 1617 * specified, then do not signal any process. Note that nosignal 1618 * will trigger a warning message if the rotated logfile needs to 1619 * be compressed, *unless* -R was specified. This is because there 1620 * presumably still are process(es) writing to the old logfile, but 1621 * we assume that a -sR request comes from a process which writes 1622 * to the logfile, and as such, that process has already made sure 1623 * that the logfile is not presently in use. 1624 */ 1625 need_notification = notified = 0; 1626 if (ent->pid_file != NULL) { 1627 need_notification = 1; 1628 if (!nosignal) 1629 notified = send_signal(ent); /* the normal case! */ 1630 else if (rotatereq) 1631 need_notification = 0; 1632 } 1633 1634 if ((flags & CE_COMPACT) || (flags & CE_BZCOMPACT)) { 1635 if (need_notification && !notified) 1636 warnx( 1637 "log %s.0 not compressed because daemon(s) not notified", 1638 ent->log); 1639 else if (noaction) { 1640 printf("\tsleep 10\n"); 1641 if (flags & CE_COMPACT) 1642 printf("\tgzip %s.0\n", ent->log); 1643 else 1644 printf("\tbzip2 %s.0\n", ent->log); 1645 } else { 1646 if (notified) { 1647 if (verbose) 1648 printf("small pause to allow daemon(s) to close log\n"); 1649 sleep(10); 1650 } 1651 if (archtodir) { 1652 (void) snprintf(file1, sizeof(file1), "%s/%s", 1653 dirpart, namepart); 1654 if (flags & CE_COMPACT) 1655 compress_log(file1, 1656 flags & CE_COMPACTWAIT); 1657 else if (flags & CE_BZCOMPACT) 1658 bzcompress_log(file1, 1659 flags & CE_COMPACTWAIT); 1660 } else { 1661 if (flags & CE_COMPACT) 1662 compress_log(ent->log, 1663 flags & CE_COMPACTWAIT); 1664 else if (flags & CE_BZCOMPACT) 1665 bzcompress_log(ent->log, 1666 flags & CE_COMPACTWAIT); 1667 } 1668 } 1669 } 1670 return (free_or_keep); 1671} 1672 1673#ifdef TRY_NEWORDER 1674static void 1675do_sigwork(struct sigwork_entry *swork) 1676{ 1677 struct sigwork_entry *nextsig; 1678 int kres, secs; 1679 1680 if (!(swork->sw_pidok) || swork->sw_pid == 0) 1681 return; /* no work to do... */ 1682 1683 /* 1684 * If nosignal (-s) was specified, then do not signal any process. 1685 * Note that a nosignal request triggers a warning message if the 1686 * rotated logfile needs to be compressed, *unless* -R was also 1687 * specified. We assume that an `-sR' request came from a process 1688 * which writes to the logfile, and as such, we assume that process 1689 * has already made sure the logfile is not presently in use. This 1690 * just sets swork->sw_pidok to a special value, and do_zipwork 1691 * will print any necessary warning(s). 1692 */ 1693 if (nosignal) { 1694 if (!rotatereq) 1695 swork->sw_pidok = -1; 1696 return; 1697 } 1698 1699 /* 1700 * Compute the pause between consecutive signals. Use a longer 1701 * sleep time if we will be sending two signals to the same 1702 * deamon or process-group. 1703 */ 1704 secs = 0; 1705 nextsig = SLIST_NEXT(swork, sw_nextp); 1706 if (nextsig != NULL) { 1707 if (swork->sw_pid == nextsig->sw_pid) 1708 secs = 10; 1709 else 1710 secs = 1; 1711 } 1712 1713 if (noaction) { 1714 printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum, 1715 (int)swork->sw_pid, swork->sw_fname); 1716 if (secs > 0) 1717 printf("\tsleep %d\n", secs); 1718 return; 1719 } 1720 1721 kres = kill(swork->sw_pid, swork->sw_signum); 1722 if (kres != 0) { 1723 /* 1724 * Assume that "no such process" (ESRCH) is something 1725 * to warn about, but is not an error. Presumably the 1726 * process which writes to the rotated log file(s) is 1727 * gone, in which case we should have no problem with 1728 * compressing the rotated log file(s). 1729 */ 1730 if (errno != ESRCH) 1731 swork->sw_pidok = 0; 1732 warn("can't notify %s, pid %d", swork->sw_pidtype, 1733 (int)swork->sw_pid); 1734 } else { 1735 if (verbose) 1736 printf("Notified %s pid %d = %s\n", swork->sw_pidtype, 1737 (int)swork->sw_pid, swork->sw_fname); 1738 if (secs > 0) { 1739 if (verbose) 1740 printf("Pause %d second(s) between signals\n", 1741 secs); 1742 sleep(secs); 1743 } 1744 } 1745} 1746 1747static void 1748do_zipwork(struct zipwork_entry *zwork) 1749{ 1750 const char *pgm_name, *pgm_path; 1751 int zstatus; 1752 pid_t pidzip, wpid; 1753 char zresult[MAXPATHLEN]; 1754 1755 pgm_path = NULL; 1756 strlcpy(zresult, zwork->zw_fname, sizeof(zresult)); 1757 if (zwork != NULL && zwork->zw_conf != NULL) { 1758 if (zwork->zw_conf->flags & CE_COMPACT) { 1759 pgm_path = _PATH_GZIP; 1760 strlcat(zresult, COMPRESS_POSTFIX, sizeof(zresult)); 1761 } else if (zwork->zw_conf->flags & CE_BZCOMPACT) { 1762 pgm_path = _PATH_BZIP2; 1763 strlcat(zresult, BZCOMPRESS_POSTFIX, sizeof(zresult)); 1764 } 1765 } 1766 if (pgm_path == NULL) { 1767 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname); 1768 return; 1769 } 1770 1771 if (zwork->zw_swork != NULL && zwork->zw_swork->sw_pidok <= 0) { 1772 warnx( 1773 "log %s not compressed because daemon(s) not notified", 1774 zwork->zw_fname); 1775 change_attrs(zwork->zw_fname, zwork->zw_conf); 1776 return; 1777 } 1778 1779 if (noaction) { 1780 pgm_name = strrchr(pgm_path, '/'); 1781 if (pgm_name == NULL) 1782 pgm_name = pgm_path; 1783 else 1784 pgm_name++; 1785 printf("\t%s %s\n", pgm_name, zwork->zw_fname); 1786 change_attrs(zresult, zwork->zw_conf); 1787 return; 1788 } 1789 1790 pidzip = fork(); 1791 if (pidzip < 0) 1792 err(1, "gzip fork"); 1793 else if (!pidzip) { 1794 /* The child process executes the compression command */ 1795 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0); 1796 err(1, pgm_path); 1797 } 1798 1799 wpid = waitpid(pidzip, &zstatus, 0); 1800 if (wpid == -1) { 1801 warn("%s: waitpid(%d)", pgm_path, pidzip); 1802 return; 1803 } 1804 if (!WIFEXITED(zstatus)) { 1805 warn("%s: did not terminate normally", pgm_path); 1806 return; 1807 } 1808 if (WEXITSTATUS(zstatus)) { 1809 warn("%s: terminated with %d (non-zero) status", 1810 pgm_path, WEXITSTATUS(zstatus)); 1811 return; 1812 } 1813 1814 /* Compression was successful, set file attributes on the result. */ 1815 change_attrs(zresult, zwork->zw_conf); 1816} 1817 1818/* 1819 * Save information on any process we need to signal. Any single 1820 * process may need to be sent different signal-values for different 1821 * log files, but usually a single signal-value will cause the process 1822 * to close and re-open all of it's log files. 1823 */ 1824static struct sigwork_entry * 1825save_sigwork(const struct conf_entry *ent) 1826{ 1827 struct sigwork_entry *sprev, *stmp; 1828 int ndiff; 1829 size_t tmpsiz; 1830 1831 sprev = NULL; 1832 ndiff = 1; 1833 SLIST_FOREACH(stmp, &swhead, sw_nextp) { 1834 ndiff = strcmp(ent->pid_file, stmp->sw_fname); 1835 if (ndiff > 0) 1836 break; 1837 if (ndiff == 0) { 1838 if (ent->sig == stmp->sw_signum) 1839 break; 1840 if (ent->sig > stmp->sw_signum) { 1841 ndiff = 1; 1842 break; 1843 } 1844 } 1845 sprev = stmp; 1846 } 1847 if (stmp != NULL && ndiff == 0) 1848 return (stmp); 1849 1850 tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_file) + 1; 1851 stmp = malloc(tmpsiz); 1852 set_swpid(stmp, ent); 1853 stmp->sw_signum = ent->sig; 1854 strcpy(stmp->sw_fname, ent->pid_file); 1855 if (sprev == NULL) 1856 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp); 1857 else 1858 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp); 1859 return (stmp); 1860} 1861 1862/* 1863 * Save information on any file we need to compress. We may see the same 1864 * file multiple times, so check the full list to avoid duplicates. The 1865 * list itself is sorted smallest-to-largest, because that's the order we 1866 * want to compress the files. If the partition is very low on disk space, 1867 * then the smallest files are the most likely to compress, and compressing 1868 * them first will free up more space for the larger files. 1869 */ 1870static struct zipwork_entry * 1871save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork, 1872 int zsize, const char *zipfname) 1873{ 1874 struct zipwork_entry *zprev, *ztmp; 1875 int ndiff; 1876 size_t tmpsiz; 1877 1878 /* Compute the size if the caller did not know it. */ 1879 if (zsize < 0) 1880 zsize = sizefile(zipfname); 1881 1882 zprev = NULL; 1883 ndiff = 1; 1884 SLIST_FOREACH(ztmp, &zwhead, zw_nextp) { 1885 ndiff = strcmp(ent->pid_file, ztmp->zw_fname); 1886 if (ndiff == 0) 1887 break; 1888 if (zsize > ztmp->zw_fsize) 1889 zprev = ztmp; 1890 } 1891 if (ztmp != NULL && ndiff == 0) 1892 return (ztmp); 1893 1894 tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1; 1895 ztmp = malloc(tmpsiz); 1896 ztmp->zw_conf = ent; 1897 ztmp->zw_swork = swork; 1898 ztmp->zw_fsize = zsize; 1899 strcpy(ztmp->zw_fname, zipfname); 1900 if (zprev == NULL) 1901 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp); 1902 else 1903 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp); 1904 return (ztmp); 1905} 1906 1907/* Send a signal to the pid specified by pidfile */ 1908static void 1909set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent) 1910{ 1911 FILE *f; 1912 long minok, maxok, rval; 1913 char *endp, *linep, line[BUFSIZ]; 1914 1915 minok = MIN_PID; 1916 maxok = MAX_PID; 1917 swork->sw_pidok = 0; 1918 swork->sw_pid = 0; 1919 swork->sw_pidtype = "daemon"; 1920 if (ent->flags & CE_SIGNALGROUP) { 1921 /* 1922 * If we are expected to signal a process-group when 1923 * rotating this logfile, then the value read in should 1924 * be the negative of a valid process ID. 1925 */ 1926 minok = -MAX_PID; 1927 maxok = -MIN_PID; 1928 swork->sw_pidtype = "process-group"; 1929 } 1930 1931 f = fopen(ent->pid_file, "r"); 1932 if (f == NULL) { 1933 warn("can't open pid file: %s", ent->pid_file); 1934 return; 1935 } 1936 1937 if (fgets(line, BUFSIZ, f) == NULL) { 1938 /* 1939 * Warn if the PID file is empty, but do not consider 1940 * it an error. Most likely it means the process has 1941 * has terminated, so it should be safe to rotate any 1942 * log files that the process would have been using. 1943 */ 1944 if (feof(f)) { 1945 swork->sw_pidok = 1; 1946 warnx("pid file is empty: %s", ent->pid_file); 1947 } else 1948 warn("can't read from pid file: %s", ent->pid_file); 1949 (void)fclose(f); 1950 return; 1951 } 1952 (void)fclose(f); 1953 1954 errno = 0; 1955 linep = line; 1956 while (*linep == ' ') 1957 linep++; 1958 rval = strtol(linep, &endp, 10); 1959 if (*endp != '\0' && !isspacech(*endp)) { 1960 warnx("pid file does not start with a valid number: %s", 1961 ent->pid_file); 1962 } else if (rval < minok || rval > maxok) { 1963 warnx("bad value '%ld' for process number in %s", 1964 rval, ent->pid_file); 1965 if (verbose) 1966 warnx("\t(expecting value between %ld and %ld)", 1967 minok, maxok); 1968 } else { 1969 swork->sw_pidok = 1; 1970 swork->sw_pid = rval; 1971 } 1972 1973 return; 1974} 1975#endif /* TRY_NEWORDER */ 1976 1977/* Log the fact that the logs were turned over */ 1978static int 1979log_trim(const char *logname, const struct conf_entry *log_ent) 1980{ 1981 FILE *f; 1982 const char *xtra; 1983 1984 if ((f = fopen(logname, "a")) == NULL) 1985 return (-1); 1986 xtra = ""; 1987 if (log_ent->def_cfg) 1988 xtra = " using <default> rule"; 1989 if (log_ent->firstcreate) 1990 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n", 1991 daytime, hostname, (int) getpid(), xtra); 1992 else if (log_ent->r_reason != NULL) 1993 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n", 1994 daytime, hostname, (int) getpid(), log_ent->r_reason, xtra); 1995 else 1996 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n", 1997 daytime, hostname, (int) getpid(), xtra); 1998 if (fclose(f) == EOF) 1999 err(1, "log_trim: fclose"); 2000 return (0); 2001} 2002 2003/* 2004 * XXX - Note that both compress_log and bzcompress_log will lose the 2005 * NODUMP flag if it was set on somelog.0. Fixing that in newsyslog 2006 * (as opposed to fixing gzip/bzip2) will require some restructuring 2007 * of the code. That restructuring is planned for a later update... 2008 */ 2009/* Fork of gzip to compress the old log file */ 2010static void 2011compress_log(char *logname, int dowait) 2012{ 2013 pid_t pid; 2014 char tmp[MAXPATHLEN]; 2015 2016 while (dowait && (wait(NULL) > 0 || errno == EINTR)) 2017 ; 2018 (void) snprintf(tmp, sizeof(tmp), "%s.0", logname); 2019 pid = fork(); 2020 if (pid < 0) 2021 err(1, "gzip fork"); 2022 else if (!pid) { 2023 (void) execl(_PATH_GZIP, _PATH_GZIP, "-f", tmp, (char *)0); 2024 err(1, _PATH_GZIP); 2025 } 2026} 2027 2028/* Fork of bzip2 to compress the old log file */ 2029static void 2030bzcompress_log(char *logname, int dowait) 2031{ 2032 pid_t pid; 2033 char tmp[MAXPATHLEN]; 2034 2035 while (dowait && (wait(NULL) > 0 || errno == EINTR)) 2036 ; 2037 snprintf(tmp, sizeof(tmp), "%s.0", logname); 2038 pid = fork(); 2039 if (pid < 0) 2040 err(1, "bzip2 fork"); 2041 else if (!pid) { 2042 execl(_PATH_BZIP2, _PATH_BZIP2, "-f", tmp, (char *)0); 2043 err(1, _PATH_BZIP2); 2044 } 2045} 2046 2047/* Return size in kilobytes of a file */ 2048static int 2049sizefile(const char *file) 2050{ 2051 struct stat sb; 2052 2053 if (stat(file, &sb) < 0) 2054 return (-1); 2055 return (kbytes(dbtob(sb.st_blocks))); 2056} 2057 2058/* Return the age of old log file (file.0) */ 2059static int 2060age_old_log(char *file) 2061{ 2062 struct stat sb; 2063 char *endp; 2064 char tmp[MAXPATHLEN + sizeof(".0") + sizeof(COMPRESS_POSTFIX) + 2065 sizeof(BZCOMPRESS_POSTFIX) + 1]; 2066 2067 if (archtodir) { 2068 char *p; 2069 2070 /* build name of archive directory into tmp */ 2071 if (*archdirname == '/') { /* absolute */ 2072 strlcpy(tmp, archdirname, sizeof(tmp)); 2073 } else { /* relative */ 2074 /* get directory part of logfile */ 2075 strlcpy(tmp, file, sizeof(tmp)); 2076 if ((p = rindex(tmp, '/')) == NULL) 2077 tmp[0] = '\0'; 2078 else 2079 *(p + 1) = '\0'; 2080 strlcat(tmp, archdirname, sizeof(tmp)); 2081 } 2082 2083 strlcat(tmp, "/", sizeof(tmp)); 2084 2085 /* get filename part of logfile */ 2086 if ((p = rindex(file, '/')) == NULL) 2087 strlcat(tmp, file, sizeof(tmp)); 2088 else 2089 strlcat(tmp, p + 1, sizeof(tmp)); 2090 } else { 2091 (void) strlcpy(tmp, file, sizeof(tmp)); 2092 } 2093 2094 strlcat(tmp, ".0", sizeof(tmp)); 2095 if (stat(tmp, &sb) < 0) { 2096 /* 2097 * A plain '.0' file does not exist. Try again, first 2098 * with the added suffix of '.gz', then with an added 2099 * suffix of '.bz2' instead of '.gz'. 2100 */ 2101 endp = strchr(tmp, '\0'); 2102 strlcat(tmp, COMPRESS_POSTFIX, sizeof(tmp)); 2103 if (stat(tmp, &sb) < 0) { 2104 *endp = '\0'; /* Remove .gz */ 2105 strlcat(tmp, BZCOMPRESS_POSTFIX, sizeof(tmp)); 2106 if (stat(tmp, &sb) < 0) 2107 return (-1); 2108 } 2109 } 2110 return ((int)(ptimeget_secs(timenow) - sb.st_mtime + 1800) / 3600); 2111} 2112 2113/* Skip Over Blanks */ 2114static char * 2115sob(char *p) 2116{ 2117 while (p && *p && isspace(*p)) 2118 p++; 2119 return (p); 2120} 2121 2122/* Skip Over Non-Blanks */ 2123static char * 2124son(char *p) 2125{ 2126 while (p && *p && !isspace(*p)) 2127 p++; 2128 return (p); 2129} 2130 2131/* Check if string is actually a number */ 2132static int 2133isnumberstr(const char *string) 2134{ 2135 while (*string) { 2136 if (!isdigitch(*string++)) 2137 return (0); 2138 } 2139 return (1); 2140} 2141 2142/* 2143 * Save the active log file under a new name. A link to the new name 2144 * is the quick-and-easy way to do this. If that fails (which it will 2145 * if the destination is on another partition), then make a copy of 2146 * the file to the new location. 2147 */ 2148static void 2149savelog(char *from, char *to) 2150{ 2151 FILE *src, *dst; 2152 int c, res; 2153 2154 res = link(from, to); 2155 if (res == 0) 2156 return; 2157 2158 if ((src = fopen(from, "r")) == NULL) 2159 err(1, "can't fopen %s for reading", from); 2160 if ((dst = fopen(to, "w")) == NULL) 2161 err(1, "can't fopen %s for writing", to); 2162 2163 while ((c = getc(src)) != EOF) { 2164 if ((putc(c, dst)) == EOF) 2165 err(1, "error writing to %s", to); 2166 } 2167 2168 if (ferror(src)) 2169 err(1, "error reading from %s", from); 2170 if ((fclose(src)) != 0) 2171 err(1, "can't fclose %s", to); 2172 if ((fclose(dst)) != 0) 2173 err(1, "can't fclose %s", from); 2174} 2175 2176/* create one or more directory components of a path */ 2177static void 2178createdir(const struct conf_entry *ent, char *dirpart) 2179{ 2180 int res; 2181 char *s, *d; 2182 char mkdirpath[MAXPATHLEN]; 2183 struct stat st; 2184 2185 s = dirpart; 2186 d = mkdirpath; 2187 2188 for (;;) { 2189 *d++ = *s++; 2190 if (*s != '/' && *s != '\0') 2191 continue; 2192 *d = '\0'; 2193 res = lstat(mkdirpath, &st); 2194 if (res != 0) { 2195 if (noaction) { 2196 printf("\tmkdir %s\n", mkdirpath); 2197 } else { 2198 res = mkdir(mkdirpath, 0755); 2199 if (res != 0) 2200 err(1, "Error on mkdir(\"%s\") for -a", 2201 mkdirpath); 2202 } 2203 } 2204 if (*s == '\0') 2205 break; 2206 } 2207 if (verbose) { 2208 if (ent->firstcreate) 2209 printf("Created directory '%s' for new %s\n", 2210 dirpart, ent->log); 2211 else 2212 printf("Created directory '%s' for -a\n", dirpart); 2213 } 2214} 2215 2216/* 2217 * Create a new log file, destroying any currently-existing version 2218 * of the log file in the process. If the caller wants a backup copy 2219 * of the file to exist, they should call 'link(logfile,logbackup)' 2220 * before calling this routine. 2221 */ 2222void 2223createlog(const struct conf_entry *ent) 2224{ 2225 int fd, failed; 2226 struct stat st; 2227 char *realfile, *slash, tempfile[MAXPATHLEN]; 2228 2229 fd = -1; 2230 realfile = ent->log; 2231 2232 /* 2233 * If this log file is being created for the first time (-C option), 2234 * then it may also be true that the parent directory does not exist 2235 * yet. Check, and create that directory if it is missing. 2236 */ 2237 if (ent->firstcreate) { 2238 strlcpy(tempfile, realfile, sizeof(tempfile)); 2239 slash = strrchr(tempfile, '/'); 2240 if (slash != NULL) { 2241 *slash = '\0'; 2242 failed = lstat(tempfile, &st); 2243 if (failed && errno != ENOENT) 2244 err(1, "Error on lstat(%s)", tempfile); 2245 if (failed) 2246 createdir(ent, tempfile); 2247 else if (!S_ISDIR(st.st_mode)) 2248 errx(1, "%s exists but is not a directory", 2249 tempfile); 2250 } 2251 } 2252 2253 /* 2254 * First create an unused filename, so it can be chown'ed and 2255 * chmod'ed before it is moved into the real location. mkstemp 2256 * will create the file mode=600 & owned by us. Note that all 2257 * temp files will have a suffix of '.z<something>'. 2258 */ 2259 strlcpy(tempfile, realfile, sizeof(tempfile)); 2260 strlcat(tempfile, ".zXXXXXX", sizeof(tempfile)); 2261 if (noaction) 2262 printf("\tmktemp %s\n", tempfile); 2263 else { 2264 fd = mkstemp(tempfile); 2265 if (fd < 0) 2266 err(1, "can't mkstemp logfile %s", tempfile); 2267 2268 /* 2269 * Add status message to what will become the new log file. 2270 */ 2271 if (!(ent->flags & CE_BINARY)) { 2272 if (log_trim(tempfile, ent)) 2273 err(1, "can't add status message to log"); 2274 } 2275 } 2276 2277 /* Change the owner/group, if we are supposed to */ 2278 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2279 if (noaction) 2280 printf("\tchown %u:%u %s\n", ent->uid, ent->gid, 2281 tempfile); 2282 else { 2283 failed = fchown(fd, ent->uid, ent->gid); 2284 if (failed) 2285 err(1, "can't fchown temp file %s", tempfile); 2286 } 2287 } 2288 2289 /* Turn on NODUMP if it was requested in the config-file. */ 2290 if (ent->flags & CE_NODUMP) { 2291 if (noaction) 2292 printf("\tchflags nodump %s\n", tempfile); 2293 else { 2294 failed = fchflags(fd, UF_NODUMP); 2295 if (failed) { 2296 warn("log_trim: fchflags(NODUMP)"); 2297 } 2298 } 2299 } 2300 2301 /* 2302 * Note that if the real logfile still exists, and if the call 2303 * to rename() fails, then "neither the old file nor the new 2304 * file shall be changed or created" (to quote the standard). 2305 * If the call succeeds, then the file will be replaced without 2306 * any window where some other process might find that the file 2307 * did not exist. 2308 * XXX - ? It may be that for some error conditions, we could 2309 * retry by first removing the realfile and then renaming. 2310 */ 2311 if (noaction) { 2312 printf("\tchmod %o %s\n", ent->permissions, tempfile); 2313 printf("\tmv %s %s\n", tempfile, realfile); 2314 } else { 2315 failed = fchmod(fd, ent->permissions); 2316 if (failed) 2317 err(1, "can't fchmod temp file '%s'", tempfile); 2318 failed = rename(tempfile, realfile); 2319 if (failed) 2320 err(1, "can't mv %s to %s", tempfile, realfile); 2321 } 2322 2323 if (fd >= 0) 2324 close(fd); 2325} 2326 2327static void 2328change_attrs(const char *fname, const struct conf_entry *ent) 2329{ 2330 int failed; 2331 2332 if (noaction) { 2333 printf("\tchmod %o %s\n", ent->permissions, fname); 2334 2335 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) 2336 printf("\tchown %u:%u %s\n", 2337 ent->uid, ent->gid, fname); 2338 2339 if (ent->flags & CE_NODUMP) 2340 printf("\tchflags nodump %s\n", fname); 2341 return; 2342 } 2343 2344 failed = chmod(fname, ent->permissions); 2345 if (failed) 2346 warn("can't chmod %s", fname); 2347 2348 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2349 failed = chown(fname, ent->uid, ent->gid); 2350 if (failed) 2351 warn("can't chown %s", fname); 2352 } 2353 2354 if (ent->flags & CE_NODUMP) { 2355 failed = chflags(fname, UF_NODUMP); 2356 if (failed) 2357 warn("can't chflags %s NODUMP", fname); 2358 } 2359} 2360