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 * $FreeBSD: src/usr.sbin/newsyslog/newsyslog.c,v 1.106 2006/07/21 22:13:06 sobomax Exp $ 50 * $DragonFly: src/usr.sbin/newsyslog/newsyslog.c,v 1.6 2007/05/12 08:52:00 swildner Exp $ 51 */ 52 53 /* 54 * newsyslog - roll over selected logs at the appropriate time, keeping the a 55 * specified number of backup files around. 56 */ 57 58 #define OSF 59 #ifndef COMPRESS_POSTFIX 60 #define COMPRESS_POSTFIX ".gz" 61 #endif 62 #ifndef BZCOMPRESS_POSTFIX 63 #define BZCOMPRESS_POSTFIX ".bz2" 64 #endif 65 66 #include <sys/param.h> 67 #include <sys/queue.h> 68 #include <sys/stat.h> 69 #include <sys/wait.h> 70 71 #include <ctype.h> 72 #include <err.h> 73 #include <errno.h> 74 #include <fcntl.h> 75 #include <fnmatch.h> 76 #include <glob.h> 77 #include <grp.h> 78 #include <paths.h> 79 #include <pwd.h> 80 #include <signal.h> 81 #include <stdio.h> 82 #include <stdlib.h> 83 #include <string.h> 84 #include <time.h> 85 #include <unistd.h> 86 87 #include "pathnames.h" 88 #include "extern.h" 89 90 /* 91 * Bit-values for the 'flags' parsed from a config-file entry. 92 */ 93 #define CE_COMPACT 0x0001 /* Compact the achived log files with gzip. */ 94 #define CE_BZCOMPACT 0x0002 /* Compact the achived log files with bzip2. */ 95 #define CE_BINARY 0x0008 /* Logfile is in binary, do not add status */ 96 /* messages to logfile(s) when rotating. */ 97 #define CE_NOSIGNAL 0x0010 /* There is no process to signal when */ 98 /* trimming this file. */ 99 #define CE_TRIMAT 0x0020 /* trim file at a specific time. */ 100 #define CE_GLOB 0x0040 /* name of the log is file name pattern. */ 101 #define CE_SIGNALGROUP 0x0080 /* Signal a process-group instead of a single */ 102 /* process when trimming this file. */ 103 #define CE_CREATE 0x0100 /* Create the log file if it does not exist. */ 104 #define CE_NODUMP 0x0200 /* Set 'nodump' on newly created log file. */ 105 106 #define MIN_PID 5 /* Don't touch pids lower than this */ 107 #define MAX_PID 99999 /* was lower, see /usr/include/sys/proc.h */ 108 109 #define kbytes(size) (((size) + 1023) >> 10) 110 111 #define DEFAULT_MARKER "<default>" 112 #define DEBUG_MARKER "<debug>" 113 114 struct conf_entry { 115 char *log; /* Name of the log */ 116 char *pid_file; /* PID file */ 117 char *r_reason; /* The reason this file is being rotated */ 118 int firstcreate; /* Creating log for the first time (-C). */ 119 int rotate; /* Non-zero if this file should be rotated */ 120 int fsize; /* size found for the log file */ 121 uid_t uid; /* Owner of log */ 122 gid_t gid; /* Group of log */ 123 int numlogs; /* Number of logs to keep */ 124 int trsize; /* Size cutoff to trigger trimming the log */ 125 int hours; /* Hours between log trimming */ 126 struct ptime_data *trim_at; /* Specific time to do trimming */ 127 unsigned int permissions; /* File permissions on the log */ 128 int flags; /* CE_COMPACT, CE_BZCOMPACT, CE_BINARY */ 129 int sig; /* Signal to send */ 130 int def_cfg; /* Using the <default> rule for this file */ 131 struct conf_entry *next;/* Linked list pointer */ 132 }; 133 134 struct sigwork_entry { 135 SLIST_ENTRY(sigwork_entry) sw_nextp; 136 int sw_signum; /* the signal to send */ 137 int sw_pidok; /* true if pid value is valid */ 138 pid_t sw_pid; /* the process id from the PID file */ 139 const char *sw_pidtype; /* "daemon" or "process group" */ 140 char sw_fname[1]; /* file the PID was read from */ 141 }; 142 143 struct zipwork_entry { 144 SLIST_ENTRY(zipwork_entry) zw_nextp; 145 const struct conf_entry *zw_conf; /* for chown/perm/flag info */ 146 const struct sigwork_entry *zw_swork; /* to know success of signal */ 147 int zw_fsize; /* size of the file to compress */ 148 char zw_fname[1]; /* the file to compress */ 149 }; 150 151 typedef enum { 152 FREE_ENT, KEEP_ENT 153 } fk_entry; 154 155 SLIST_HEAD(swlisthead, sigwork_entry) swhead = SLIST_HEAD_INITIALIZER(swhead); 156 SLIST_HEAD(zwlisthead, zipwork_entry) zwhead = SLIST_HEAD_INITIALIZER(zwhead); 157 158 int dbg_at_times; /* -D Show details of 'trim_at' code */ 159 160 int archtodir = 0; /* Archive old logfiles to other directory */ 161 int createlogs; /* Create (non-GLOB) logfiles which do not */ 162 /* already exist. 1=='for entries with */ 163 /* C flag', 2=='for all entries'. */ 164 int verbose = 0; /* Print out what's going on */ 165 int needroot = 1; /* Root privs are necessary */ 166 int noaction = 0; /* Don't do anything, just show it */ 167 int norotate = 0; /* Don't rotate */ 168 int nosignal; /* Do not send any signals */ 169 int force = 0; /* Force the trim no matter what */ 170 int rotatereq = 0; /* -R = Always rotate the file(s) as given */ 171 /* on the command (this also requires */ 172 /* that a list of files *are* given on */ 173 /* the run command). */ 174 char *requestor; /* The name given on a -R request */ 175 char *archdirname; /* Directory path to old logfiles archive */ 176 char *destdir = NULL; /* Directory to treat at root for logs */ 177 const char *conf; /* Configuration file to use */ 178 179 struct ptime_data *dbg_timenow; /* A "timenow" value set via -D option */ 180 struct ptime_data *timenow; /* The time to use for checking at-fields */ 181 182 #define DAYTIME_LEN 16 183 char daytime[DAYTIME_LEN]; /* The current time in human readable form, 184 * used for rotation-tracking messages. */ 185 char hostname[MAXHOSTNAMELEN]; /* hostname */ 186 187 static struct conf_entry *get_worklist(char **files); 188 static void parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p, 189 struct conf_entry **glob_p, struct conf_entry **defconf_p); 190 static char *sob(char *p); 191 static char *son(char *p); 192 static int isnumberstr(const char *); 193 static char *missing_field(char *p, char *errline); 194 static void change_attrs(const char *, const struct conf_entry *); 195 static fk_entry do_entry(struct conf_entry *); 196 static fk_entry do_rotate(const struct conf_entry *); 197 static void do_sigwork(struct sigwork_entry *); 198 static void do_zipwork(struct zipwork_entry *); 199 static struct sigwork_entry * 200 save_sigwork(const struct conf_entry *); 201 static struct zipwork_entry * 202 save_zipwork(const struct conf_entry *, const struct 203 sigwork_entry *, int, const char *); 204 static void set_swpid(struct sigwork_entry *, const struct conf_entry *); 205 static int sizefile(const char *); 206 static void expand_globs(struct conf_entry **work_p, 207 struct conf_entry **glob_p); 208 static void free_clist(struct conf_entry **firstent); 209 static void free_entry(struct conf_entry *ent); 210 static struct conf_entry *init_entry(const char *fname, 211 struct conf_entry *src_entry); 212 static void parse_args(int argc, char **argv); 213 static int parse_doption(const char *doption); 214 static void usage(void); 215 static int log_trim(const char *logname, const struct conf_entry *log_ent); 216 static int age_old_log(char *file); 217 static void savelog(char *from, char *to); 218 static void createdir(const struct conf_entry *ent, char *dirpart); 219 static void createlog(const struct conf_entry *ent); 220 221 /* 222 * All the following take a parameter of 'int', but expect values in the 223 * range of unsigned char. Define wrappers which take values of type 'char', 224 * whether signed or unsigned, and ensure they end up in the right range. 225 */ 226 #define isdigitch(Anychar) isdigit((u_char)(Anychar)) 227 #define isprintch(Anychar) isprint((u_char)(Anychar)) 228 #define isspacech(Anychar) isspace((u_char)(Anychar)) 229 #define tolowerch(Anychar) tolower((u_char)(Anychar)) 230 231 int 232 main(int argc, char **argv) 233 { 234 fk_entry free_or_keep; 235 struct conf_entry *p, *q; 236 struct sigwork_entry *stmp; 237 struct zipwork_entry *ztmp; 238 239 SLIST_INIT(&swhead); 240 SLIST_INIT(&zwhead); 241 242 parse_args(argc, argv); 243 argc -= optind; 244 argv += optind; 245 246 if (needroot && getuid() && geteuid()) 247 errx(1, "must have root privs"); 248 p = q = get_worklist(argv); 249 250 /* 251 * Rotate all the files which need to be rotated. Note that 252 * some users have *hundreds* of entries in newsyslog.conf! 253 */ 254 while (p) { 255 free_or_keep = do_entry(p); 256 p = p->next; 257 if (free_or_keep == FREE_ENT) 258 free_entry(q); 259 q = p; 260 } 261 262 /* 263 * Send signals to any processes which need a signal to tell 264 * them to close and re-open the log file(s) we have rotated. 265 * Note that zipwork_entries include pointers to these 266 * sigwork_entry's, so we can not free the entries here. 267 */ 268 if (!SLIST_EMPTY(&swhead)) { 269 if (noaction || verbose) 270 printf("Signal all daemon process(es)...\n"); 271 SLIST_FOREACH(stmp, &swhead, sw_nextp) 272 do_sigwork(stmp); 273 if (noaction) 274 printf("\tsleep 10\n"); 275 else { 276 if (verbose) 277 printf("Pause 10 seconds to allow daemon(s)" 278 " to close log file(s)\n"); 279 sleep(10); 280 } 281 } 282 /* 283 * Compress all files that we're expected to compress, now 284 * that all processes should have closed the files which 285 * have been rotated. 286 */ 287 if (!SLIST_EMPTY(&zwhead)) { 288 if (noaction || verbose) 289 printf("Compress all rotated log file(s)...\n"); 290 while (!SLIST_EMPTY(&zwhead)) { 291 ztmp = SLIST_FIRST(&zwhead); 292 do_zipwork(ztmp); 293 SLIST_REMOVE_HEAD(&zwhead, zw_nextp); 294 free(ztmp); 295 } 296 } 297 /* Now free all the sigwork entries. */ 298 while (!SLIST_EMPTY(&swhead)) { 299 stmp = SLIST_FIRST(&swhead); 300 SLIST_REMOVE_HEAD(&swhead, sw_nextp); 301 free(stmp); 302 } 303 304 while (wait(NULL) > 0 || errno == EINTR) 305 ; 306 return (0); 307 } 308 309 static struct conf_entry * 310 init_entry(const char *fname, struct conf_entry *src_entry) 311 { 312 struct conf_entry *tempwork; 313 314 if (verbose > 4) 315 printf("\t--> [creating entry for %s]\n", fname); 316 317 tempwork = malloc(sizeof(struct conf_entry)); 318 if (tempwork == NULL) 319 err(1, "malloc of conf_entry for %s", fname); 320 321 if (destdir == NULL || fname[0] != '/') 322 tempwork->log = strdup(fname); 323 else 324 asprintf(&tempwork->log, "%s%s", destdir, fname); 325 if (tempwork->log == NULL) 326 err(1, "strdup for %s", fname); 327 328 if (src_entry != NULL) { 329 tempwork->pid_file = NULL; 330 if (src_entry->pid_file) 331 tempwork->pid_file = strdup(src_entry->pid_file); 332 tempwork->r_reason = NULL; 333 tempwork->firstcreate = 0; 334 tempwork->rotate = 0; 335 tempwork->fsize = -1; 336 tempwork->uid = src_entry->uid; 337 tempwork->gid = src_entry->gid; 338 tempwork->numlogs = src_entry->numlogs; 339 tempwork->trsize = src_entry->trsize; 340 tempwork->hours = src_entry->hours; 341 tempwork->trim_at = NULL; 342 if (src_entry->trim_at != NULL) 343 tempwork->trim_at = ptime_init(src_entry->trim_at); 344 tempwork->permissions = src_entry->permissions; 345 tempwork->flags = src_entry->flags; 346 tempwork->sig = src_entry->sig; 347 tempwork->def_cfg = src_entry->def_cfg; 348 } else { 349 /* Initialize as a "do-nothing" entry */ 350 tempwork->pid_file = NULL; 351 tempwork->r_reason = NULL; 352 tempwork->firstcreate = 0; 353 tempwork->rotate = 0; 354 tempwork->fsize = -1; 355 tempwork->uid = (uid_t)-1; 356 tempwork->gid = (gid_t)-1; 357 tempwork->numlogs = 1; 358 tempwork->trsize = -1; 359 tempwork->hours = -1; 360 tempwork->trim_at = NULL; 361 tempwork->permissions = 0; 362 tempwork->flags = 0; 363 tempwork->sig = SIGHUP; 364 tempwork->def_cfg = 0; 365 } 366 tempwork->next = NULL; 367 368 return (tempwork); 369 } 370 371 static void 372 free_entry(struct conf_entry *ent) 373 { 374 375 if (ent == NULL) 376 return; 377 378 if (ent->log != NULL) { 379 if (verbose > 4) 380 printf("\t--> [freeing entry for %s]\n", ent->log); 381 free(ent->log); 382 ent->log = NULL; 383 } 384 385 if (ent->pid_file != NULL) { 386 free(ent->pid_file); 387 ent->pid_file = NULL; 388 } 389 390 if (ent->r_reason != NULL) { 391 free(ent->r_reason); 392 ent->r_reason = NULL; 393 } 394 395 if (ent->trim_at != NULL) { 396 ptime_free(ent->trim_at); 397 ent->trim_at = NULL; 398 } 399 400 free(ent); 401 } 402 403 static void 404 free_clist(struct conf_entry **firstent) 405 { 406 struct conf_entry *ent, *nextent; 407 408 if (firstent == NULL) 409 return; /* There is nothing to do. */ 410 411 ent = *firstent; 412 firstent = NULL; 413 414 while (ent) { 415 nextent = ent->next; 416 free_entry(ent); 417 ent = nextent; 418 } 419 } 420 421 static fk_entry 422 do_entry(struct conf_entry * ent) 423 { 424 #define REASON_MAX 80 425 int modtime; 426 fk_entry free_or_keep; 427 double diffsecs; 428 char temp_reason[REASON_MAX]; 429 430 free_or_keep = FREE_ENT; 431 if (verbose) { 432 if (ent->flags & CE_COMPACT) 433 printf("%s <%dZ>: ", ent->log, ent->numlogs); 434 else if (ent->flags & CE_BZCOMPACT) 435 printf("%s <%dJ>: ", ent->log, ent->numlogs); 436 else 437 printf("%s <%d>: ", ent->log, ent->numlogs); 438 } 439 ent->fsize = sizefile(ent->log); 440 modtime = age_old_log(ent->log); 441 ent->rotate = 0; 442 ent->firstcreate = 0; 443 if (ent->fsize < 0) { 444 /* 445 * If either the C flag or the -C option was specified, 446 * and if we won't be creating the file, then have the 447 * verbose message include a hint as to why the file 448 * will not be created. 449 */ 450 temp_reason[0] = '\0'; 451 if (createlogs > 1) 452 ent->firstcreate = 1; 453 else if ((ent->flags & CE_CREATE) && createlogs) 454 ent->firstcreate = 1; 455 else if (ent->flags & CE_CREATE) 456 strlcpy(temp_reason, " (no -C option)", REASON_MAX); 457 else if (createlogs) 458 strlcpy(temp_reason, " (no C flag)", REASON_MAX); 459 460 if (ent->firstcreate) { 461 if (verbose) 462 printf("does not exist -> will create.\n"); 463 createlog(ent); 464 } else if (verbose) { 465 printf("does not exist, skipped%s.\n", temp_reason); 466 } 467 } else { 468 if (ent->flags & CE_TRIMAT && !force && !rotatereq) { 469 diffsecs = ptimeget_diff(timenow, ent->trim_at); 470 if (diffsecs < 0.0) { 471 /* trim_at is some time in the future. */ 472 if (verbose) { 473 ptime_adjust4dst(ent->trim_at, 474 timenow); 475 printf("--> will trim at %s", 476 ptimeget_ctime(ent->trim_at)); 477 } 478 return (free_or_keep); 479 } else if (diffsecs >= 3600.0) { 480 /* 481 * trim_at is more than an hour in the past, 482 * so find the next valid trim_at time, and 483 * tell the user what that will be. 484 */ 485 if (verbose && dbg_at_times) 486 printf("\n\t--> prev trim at %s\t", 487 ptimeget_ctime(ent->trim_at)); 488 if (verbose) { 489 ptimeset_nxtime(ent->trim_at); 490 printf("--> will trim at %s", 491 ptimeget_ctime(ent->trim_at)); 492 } 493 return (free_or_keep); 494 } else if (verbose && noaction && dbg_at_times) { 495 /* 496 * If we are just debugging at-times, then 497 * a detailed message is helpful. Also 498 * skip "doing" any commands, since they 499 * would all be turned off by no-action. 500 */ 501 printf("\n\t--> timematch at %s", 502 ptimeget_ctime(ent->trim_at)); 503 return (free_or_keep); 504 } else if (verbose && ent->hours <= 0) { 505 printf("--> time is up\n"); 506 } 507 } 508 if (verbose && (ent->trsize > 0)) 509 printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize); 510 if (verbose && (ent->hours > 0)) 511 printf(" age (hr): %d [%d] ", modtime, ent->hours); 512 513 /* 514 * Figure out if this logfile needs to be rotated. 515 */ 516 temp_reason[0] = '\0'; 517 if (rotatereq) { 518 ent->rotate = 1; 519 snprintf(temp_reason, REASON_MAX, " due to -R from %s", 520 requestor); 521 } else if (force) { 522 ent->rotate = 1; 523 snprintf(temp_reason, REASON_MAX, " due to -F request"); 524 } else if ((ent->trsize > 0) && (ent->fsize >= ent->trsize)) { 525 ent->rotate = 1; 526 snprintf(temp_reason, REASON_MAX, " due to size>%dK", 527 ent->trsize); 528 } else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) { 529 ent->rotate = 1; 530 } else if ((ent->hours > 0) && ((modtime >= ent->hours) || 531 (modtime < 0))) { 532 ent->rotate = 1; 533 } 534 535 /* 536 * If the file needs to be rotated, then rotate it. 537 */ 538 if (ent->rotate && !norotate) { 539 if (temp_reason[0] != '\0') 540 ent->r_reason = strdup(temp_reason); 541 if (verbose) 542 printf("--> trimming log....\n"); 543 if (noaction && !verbose) { 544 if (ent->flags & CE_COMPACT) 545 printf("%s <%dZ>: trimming\n", 546 ent->log, ent->numlogs); 547 else if (ent->flags & CE_BZCOMPACT) 548 printf("%s <%dJ>: trimming\n", 549 ent->log, ent->numlogs); 550 else 551 printf("%s <%d>: trimming\n", 552 ent->log, ent->numlogs); 553 } 554 free_or_keep = do_rotate(ent); 555 } else { 556 if (verbose) 557 printf("--> skipping\n"); 558 } 559 } 560 return (free_or_keep); 561 #undef REASON_MAX 562 } 563 564 static void 565 parse_args(int argc, char **argv) 566 { 567 int ch; 568 char *p; 569 570 timenow = ptime_init(NULL); 571 ptimeset_time(timenow, time(NULL)); 572 strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN); 573 574 /* Let's get our hostname */ 575 gethostname(hostname, sizeof(hostname)); 576 577 /* Truncate domain */ 578 if ((p = strchr(hostname, '.')) != NULL) 579 *p = '\0'; 580 581 /* Parse command line options. */ 582 while ((ch = getopt(argc, argv, "a:d:f:nrsvCD:FNR:")) != -1) 583 switch (ch) { 584 case 'a': 585 archtodir++; 586 archdirname = optarg; 587 break; 588 case 'd': 589 destdir = optarg; 590 break; 591 case 'f': 592 conf = optarg; 593 break; 594 case 'n': 595 noaction++; 596 break; 597 case 'r': 598 needroot = 0; 599 break; 600 case 's': 601 nosignal = 1; 602 break; 603 case 'v': 604 verbose++; 605 break; 606 case 'C': 607 /* Useful for things like rc.diskless... */ 608 createlogs++; 609 break; 610 case 'D': 611 /* 612 * Set some debugging option. The specific option 613 * depends on the value of optarg. These options 614 * may come and go without notice or documentation. 615 */ 616 if (parse_doption(optarg)) 617 break; 618 usage(); 619 /* NOTREACHED */ 620 case 'F': 621 force++; 622 break; 623 case 'N': 624 norotate++; 625 break; 626 case 'R': 627 rotatereq++; 628 requestor = strdup(optarg); 629 break; 630 case 'm': /* Used by OpenBSD for "monitor mode" */ 631 default: 632 usage(); 633 /* NOTREACHED */ 634 } 635 636 if (force && norotate) { 637 warnx("Only one of -F and -N may be specified."); 638 usage(); 639 /* NOTREACHED */ 640 } 641 642 if (rotatereq) { 643 if (optind == argc) { 644 warnx("At least one filename must be given when -R is specified."); 645 usage(); 646 /* NOTREACHED */ 647 } 648 /* Make sure "requestor" value is safe for a syslog message. */ 649 for (p = requestor; *p != '\0'; p++) { 650 if (!isprintch(*p) && (*p != '\t')) 651 *p = '.'; 652 } 653 } 654 655 if (dbg_timenow) { 656 /* 657 * Note that the 'daytime' variable is not changed. 658 * That is only used in messages that track when a 659 * logfile is rotated, and if a file *is* rotated, 660 * then it will still rotated at the "real now" time. 661 */ 662 ptime_free(timenow); 663 timenow = dbg_timenow; 664 fprintf(stderr, "Debug: Running as if TimeNow is %s", 665 ptimeget_ctime(dbg_timenow)); 666 } 667 668 } 669 670 /* 671 * These debugging options are mainly meant for developer use, such 672 * as writing regression-tests. They would not be needed by users 673 * during normal operation of newsyslog... 674 */ 675 static int 676 parse_doption(const char *doption) 677 { 678 const char TN[] = "TN="; 679 int res; 680 681 if (strncmp(doption, TN, sizeof(TN) - 1) == 0) { 682 /* 683 * The "TimeNow" debugging option. This might be off 684 * by an hour when crossing a timezone change. 685 */ 686 dbg_timenow = ptime_init(NULL); 687 res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601, 688 time(NULL), doption + sizeof(TN) - 1); 689 if (res == -2) { 690 warnx("Non-existent time specified on -D %s", doption); 691 return (0); /* failure */ 692 } else if (res < 0) { 693 warnx("Malformed time given on -D %s", doption); 694 return (0); /* failure */ 695 } 696 return (1); /* successfully parsed */ 697 698 } 699 700 if (strcmp(doption, "ats") == 0) { 701 dbg_at_times++; 702 return (1); /* successfully parsed */ 703 } 704 705 /* XXX - This check could probably be dropped. */ 706 if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder") 707 == 0)) { 708 warnx("NOTE: newsyslog always uses 'neworder'."); 709 return (1); /* successfully parsed */ 710 } 711 712 warnx("Unknown -D (debug) option: '%s'", doption); 713 return (0); /* failure */ 714 } 715 716 static void 717 usage(void) 718 { 719 720 fprintf(stderr, 721 "usage: newsyslog [-CFNnrsv] [-a directory] [-d directory] [-f config-file]\n" 722 " [ [-R requestor] filename ... ]\n"); 723 exit(1); 724 } 725 726 /* 727 * Parse a configuration file and return a linked list of all the logs 728 * which should be processed. 729 */ 730 static struct conf_entry * 731 get_worklist(char **files) 732 { 733 FILE *f; 734 const char *fname; 735 char **given; 736 struct conf_entry *defconf, *dupent, *ent, *firstnew; 737 struct conf_entry *globlist, *lastnew, *worklist; 738 int gmatch, fnres; 739 740 defconf = globlist = worklist = NULL; 741 742 fname = conf; 743 if (fname == NULL) 744 fname = _PATH_CONF; 745 746 if (strcmp(fname, "-") != 0) 747 f = fopen(fname, "r"); 748 else { 749 f = stdin; 750 fname = "<stdin>"; 751 } 752 if (!f) 753 err(1, "%s", fname); 754 755 parse_file(f, fname, &worklist, &globlist, &defconf); 756 fclose(f); 757 758 /* 759 * All config-file information has been read in and turned into 760 * a worklist and a globlist. If there were no specific files 761 * given on the run command, then the only thing left to do is to 762 * call a routine which finds all files matched by the globlist 763 * and adds them to the worklist. Then return the worklist. 764 */ 765 if (*files == NULL) { 766 expand_globs(&worklist, &globlist); 767 free_clist(&globlist); 768 if (defconf != NULL) 769 free_entry(defconf); 770 return (worklist); 771 /* NOTREACHED */ 772 } 773 774 /* 775 * If newsyslog was given a specific list of files to process, 776 * it may be that some of those files were not listed in any 777 * config file. Those unlisted files should get the default 778 * rotation action. First, create the default-rotation action 779 * if none was found in a system config file. 780 */ 781 if (defconf == NULL) { 782 defconf = init_entry(DEFAULT_MARKER, NULL); 783 defconf->numlogs = 3; 784 defconf->trsize = 50; 785 defconf->permissions = S_IRUSR|S_IWUSR; 786 } 787 788 /* 789 * If newsyslog was run with a list of specific filenames, 790 * then create a new worklist which has only those files in 791 * it, picking up the rotation-rules for those files from 792 * the original worklist. 793 * 794 * XXX - Note that this will copy multiple rules for a single 795 * logfile, if multiple entries are an exact match for 796 * that file. That matches the historic behavior, but do 797 * we want to continue to allow it? If so, it should 798 * probably be handled more intelligently. 799 */ 800 firstnew = lastnew = NULL; 801 for (given = files; *given; ++given) { 802 /* 803 * First try to find exact-matches for this given file. 804 */ 805 gmatch = 0; 806 for (ent = worklist; ent; ent = ent->next) { 807 if (strcmp(ent->log, *given) == 0) { 808 gmatch++; 809 dupent = init_entry(*given, ent); 810 if (!firstnew) 811 firstnew = dupent; 812 else 813 lastnew->next = dupent; 814 lastnew = dupent; 815 } 816 } 817 if (gmatch) { 818 if (verbose > 2) 819 printf("\t+ Matched entry %s\n", *given); 820 continue; 821 } 822 823 /* 824 * There was no exact-match for this given file, so look 825 * for a "glob" entry which does match. 826 */ 827 gmatch = 0; 828 if (verbose > 2 && globlist != NULL) 829 printf("\t+ Checking globs for %s\n", *given); 830 for (ent = globlist; ent; ent = ent->next) { 831 fnres = fnmatch(ent->log, *given, FNM_PATHNAME); 832 if (verbose > 2) 833 printf("\t+ = %d for pattern %s\n", fnres, 834 ent->log); 835 if (fnres == 0) { 836 gmatch++; 837 dupent = init_entry(*given, ent); 838 if (!firstnew) 839 firstnew = dupent; 840 else 841 lastnew->next = dupent; 842 lastnew = dupent; 843 /* This new entry is not a glob! */ 844 dupent->flags &= ~CE_GLOB; 845 /* Only allow a match to one glob-entry */ 846 break; 847 } 848 } 849 if (gmatch) { 850 if (verbose > 2) 851 printf("\t+ Matched %s via %s\n", *given, 852 ent->log); 853 continue; 854 } 855 856 /* 857 * This given file was not found in any config file, so 858 * add a worklist item based on the default entry. 859 */ 860 if (verbose > 2) 861 printf("\t+ No entry matched %s (will use %s)\n", 862 *given, DEFAULT_MARKER); 863 dupent = init_entry(*given, defconf); 864 if (!firstnew) 865 firstnew = dupent; 866 else 867 lastnew->next = dupent; 868 /* Mark that it was *not* found in a config file */ 869 dupent->def_cfg = 1; 870 lastnew = dupent; 871 } 872 873 /* 874 * Free all the entries in the original work list, the list of 875 * glob entries, and the default entry. 876 */ 877 free_clist(&worklist); 878 free_clist(&globlist); 879 free_entry(defconf); 880 881 /* And finally, return a worklist which matches the given files. */ 882 return (firstnew); 883 } 884 885 /* 886 * Expand the list of entries with filename patterns, and add all files 887 * which match those glob-entries onto the worklist. 888 */ 889 static void 890 expand_globs(struct conf_entry **work_p, struct conf_entry **glob_p) 891 { 892 int gmatch, gres; 893 size_t i; 894 char *mfname; 895 struct conf_entry *dupent, *ent, *firstmatch, *globent; 896 struct conf_entry *lastmatch; 897 glob_t pglob; 898 struct stat st_fm; 899 900 if ((glob_p == NULL) || (*glob_p == NULL)) 901 return; /* There is nothing to do. */ 902 903 /* 904 * The worklist contains all fully-specified (non-GLOB) names. 905 * 906 * Now expand the list of filename-pattern (GLOB) entries into 907 * a second list, which (by definition) will only match files 908 * that already exist. Do not add a glob-related entry for any 909 * file which already exists in the fully-specified list. 910 */ 911 firstmatch = lastmatch = NULL; 912 for (globent = *glob_p; globent; globent = globent->next) { 913 914 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob); 915 if (gres != 0) { 916 warn("cannot expand pattern (%d): %s", gres, 917 globent->log); 918 continue; 919 } 920 921 if (verbose > 2) 922 printf("\t+ Expanding pattern %s\n", globent->log); 923 for (i = 0; i < pglob.gl_matchc; i++) { 924 mfname = pglob.gl_pathv[i]; 925 926 /* See if this file already has a specific entry. */ 927 gmatch = 0; 928 for (ent = *work_p; ent; ent = ent->next) { 929 if (strcmp(mfname, ent->log) == 0) { 930 gmatch++; 931 break; 932 } 933 } 934 if (gmatch) 935 continue; 936 937 /* Make sure the named matched is a file. */ 938 gres = lstat(mfname, &st_fm); 939 if (gres != 0) { 940 /* Error on a file that glob() matched?!? */ 941 warn("Skipping %s - lstat() error", mfname); 942 continue; 943 } 944 if (!S_ISREG(st_fm.st_mode)) { 945 /* We only rotate files! */ 946 if (verbose > 2) 947 printf("\t+ . skipping %s (!file)\n", 948 mfname); 949 continue; 950 } 951 952 if (verbose > 2) 953 printf("\t+ . add file %s\n", mfname); 954 dupent = init_entry(mfname, globent); 955 if (!firstmatch) 956 firstmatch = dupent; 957 else 958 lastmatch->next = dupent; 959 lastmatch = dupent; 960 /* This new entry is not a glob! */ 961 dupent->flags &= ~CE_GLOB; 962 } 963 globfree(&pglob); 964 if (verbose > 2) 965 printf("\t+ Done with pattern %s\n", globent->log); 966 } 967 968 /* Add the list of matched files to the end of the worklist. */ 969 if (!*work_p) 970 *work_p = firstmatch; 971 else { 972 ent = *work_p; 973 while (ent->next) 974 ent = ent->next; 975 ent->next = firstmatch; 976 } 977 978 } 979 980 /* 981 * Parse a configuration file and update a linked list of all the logs to 982 * process. 983 */ 984 static void 985 parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p, 986 struct conf_entry **glob_p, struct conf_entry **defconf_p) 987 { 988 char line[BUFSIZ], *parse, *q; 989 char *cp, *errline, *group; 990 struct conf_entry *lastglob, *lastwork, *working; 991 struct passwd *pwd; 992 struct group *grp; 993 int eol, ptm_opts, res, special; 994 995 /* 996 * XXX - for now, assume that only one config file will be read, 997 * ie, this routine is only called one time. 998 */ 999 lastglob = lastwork = NULL; 1000 1001 errline = NULL; 1002 while (fgets(line, BUFSIZ, cf)) { 1003 if ((line[0] == '\n') || (line[0] == '#') || 1004 (strlen(line) == 0)) 1005 continue; 1006 if (errline != NULL) 1007 free(errline); 1008 errline = strdup(line); 1009 for (cp = line + 1; *cp != '\0'; cp++) { 1010 if (*cp != '#') 1011 continue; 1012 if (*(cp - 1) == '\\') { 1013 strcpy(cp - 1, cp); 1014 cp--; 1015 continue; 1016 } 1017 *cp = '\0'; 1018 break; 1019 } 1020 1021 q = parse = missing_field(sob(line), errline); 1022 parse = son(line); 1023 if (!*parse) 1024 errx(1, "malformed line (missing fields):\n%s", 1025 errline); 1026 *parse = '\0'; 1027 1028 /* 1029 * Allow people to set debug options via the config file. 1030 * (NOTE: debug optons are undocumented, and may disappear 1031 * at any time, etc). 1032 */ 1033 if (strcasecmp(DEBUG_MARKER, q) == 0) { 1034 q = parse = missing_field(sob(++parse), errline); 1035 parse = son(parse); 1036 if (!*parse) 1037 warnx("debug line specifies no option:\n%s", 1038 errline); 1039 else { 1040 *parse = '\0'; 1041 parse_doption(q); 1042 } 1043 continue; 1044 } 1045 1046 special = 0; 1047 working = init_entry(q, NULL); 1048 if (strcasecmp(DEFAULT_MARKER, q) == 0) { 1049 special = 1; 1050 if (defconf_p == NULL) { 1051 warnx("Ignoring entry for %s in %s!", q, 1052 cfname); 1053 free_entry(working); 1054 continue; 1055 } else if (*defconf_p != NULL) { 1056 warnx("Ignoring duplicate entry for %s!", q); 1057 free_entry(working); 1058 continue; 1059 } 1060 *defconf_p = working; 1061 } 1062 1063 q = parse = missing_field(sob(++parse), errline); 1064 parse = son(parse); 1065 if (!*parse) 1066 errx(1, "malformed line (missing fields):\n%s", 1067 errline); 1068 *parse = '\0'; 1069 if ((group = strchr(q, ':')) != NULL || 1070 (group = strrchr(q, '.')) != NULL) { 1071 *group++ = '\0'; 1072 if (*q) { 1073 if (!(isnumberstr(q))) { 1074 if ((pwd = getpwnam(q)) == NULL) 1075 errx(1, 1076 "error in config file; unknown user:\n%s", 1077 errline); 1078 working->uid = pwd->pw_uid; 1079 } else 1080 working->uid = atoi(q); 1081 } else 1082 working->uid = (uid_t)-1; 1083 1084 q = group; 1085 if (*q) { 1086 if (!(isnumberstr(q))) { 1087 if ((grp = getgrnam(q)) == NULL) 1088 errx(1, 1089 "error in config file; unknown group:\n%s", 1090 errline); 1091 working->gid = grp->gr_gid; 1092 } else 1093 working->gid = atoi(q); 1094 } else 1095 working->gid = (gid_t)-1; 1096 1097 q = parse = missing_field(sob(++parse), errline); 1098 parse = son(parse); 1099 if (!*parse) 1100 errx(1, "malformed line (missing fields):\n%s", 1101 errline); 1102 *parse = '\0'; 1103 } else { 1104 working->uid = (uid_t)-1; 1105 working->gid = (gid_t)-1; 1106 } 1107 1108 if (!sscanf(q, "%o", &working->permissions)) 1109 errx(1, "error in config file; bad permissions:\n%s", 1110 errline); 1111 1112 q = parse = missing_field(sob(++parse), errline); 1113 parse = son(parse); 1114 if (!*parse) 1115 errx(1, "malformed line (missing fields):\n%s", 1116 errline); 1117 *parse = '\0'; 1118 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0) 1119 errx(1, "error in config file; bad value for count of logs to save:\n%s", 1120 errline); 1121 1122 q = parse = missing_field(sob(++parse), errline); 1123 parse = son(parse); 1124 if (!*parse) 1125 errx(1, "malformed line (missing fields):\n%s", 1126 errline); 1127 *parse = '\0'; 1128 if (isdigitch(*q)) 1129 working->trsize = atoi(q); 1130 else if (strcmp(q, "*") == 0) 1131 working->trsize = -1; 1132 else { 1133 warnx("Invalid value of '%s' for 'size' in line:\n%s", 1134 q, errline); 1135 working->trsize = -1; 1136 } 1137 1138 working->flags = 0; 1139 q = parse = missing_field(sob(++parse), errline); 1140 parse = son(parse); 1141 eol = !*parse; 1142 *parse = '\0'; 1143 { 1144 char *ep; 1145 u_long ul; 1146 1147 ul = strtoul(q, &ep, 10); 1148 if (ep == q) 1149 working->hours = 0; 1150 else if (*ep == '*') 1151 working->hours = -1; 1152 else if (ul > INT_MAX) 1153 errx(1, "interval is too large:\n%s", errline); 1154 else 1155 working->hours = ul; 1156 1157 if (*ep == '\0' || strcmp(ep, "*") == 0) 1158 goto no_trimat; 1159 if (*ep != '@' && *ep != '$') 1160 errx(1, "malformed interval/at:\n%s", errline); 1161 1162 working->flags |= CE_TRIMAT; 1163 working->trim_at = ptime_init(NULL); 1164 ptm_opts = PTM_PARSE_ISO8601; 1165 if (*ep == '$') 1166 ptm_opts = PTM_PARSE_DWM; 1167 ptm_opts |= PTM_PARSE_MATCHDOM; 1168 res = ptime_relparse(working->trim_at, ptm_opts, 1169 ptimeget_secs(timenow), ep + 1); 1170 if (res == -2) 1171 errx(1, "nonexistent time for 'at' value:\n%s", 1172 errline); 1173 else if (res < 0) 1174 errx(1, "malformed 'at' value:\n%s", errline); 1175 } 1176 no_trimat: 1177 1178 if (eol) 1179 q = NULL; 1180 else { 1181 q = parse = sob(++parse); /* Optional field */ 1182 parse = son(parse); 1183 if (!*parse) 1184 eol = 1; 1185 *parse = '\0'; 1186 } 1187 1188 for (; q && *q && !isspacech(*q); q++) { 1189 switch (tolowerch(*q)) { 1190 case 'b': 1191 working->flags |= CE_BINARY; 1192 break; 1193 case 'c': 1194 /* 1195 * XXX - Ick! Ugly! Remove ASAP! 1196 * We want `c' and `C' for "create". But we 1197 * will temporarily treat `c' as `g', because 1198 * FreeBSD releases <= 4.8 have a typo of 1199 * checking ('G' || 'c') for CE_GLOB. 1200 */ 1201 if (*q == 'c') { 1202 warnx("Assuming 'g' for 'c' in flags for line:\n%s", 1203 errline); 1204 warnx("The 'c' flag will eventually mean 'CREATE'"); 1205 working->flags |= CE_GLOB; 1206 break; 1207 } 1208 working->flags |= CE_CREATE; 1209 break; 1210 case 'd': 1211 working->flags |= CE_NODUMP; 1212 break; 1213 case 'g': 1214 working->flags |= CE_GLOB; 1215 break; 1216 case 'j': 1217 working->flags |= CE_BZCOMPACT; 1218 break; 1219 case 'n': 1220 working->flags |= CE_NOSIGNAL; 1221 break; 1222 case 'u': 1223 working->flags |= CE_SIGNALGROUP; 1224 break; 1225 case 'w': 1226 /* Deprecated flag - keep for compatibility purposes */ 1227 break; 1228 case 'z': 1229 working->flags |= CE_COMPACT; 1230 break; 1231 case '-': 1232 break; 1233 case 'f': /* Used by OpenBSD for "CE_FOLLOW" */ 1234 case 'm': /* Used by OpenBSD for "CE_MONITOR" */ 1235 case 'p': /* Used by NetBSD for "CE_PLAIN0" */ 1236 default: 1237 errx(1, "illegal flag in config file -- %c", 1238 *q); 1239 } 1240 } 1241 1242 if (eol) 1243 q = NULL; 1244 else { 1245 q = parse = sob(++parse); /* Optional field */ 1246 parse = son(parse); 1247 if (!*parse) 1248 eol = 1; 1249 *parse = '\0'; 1250 } 1251 1252 working->pid_file = NULL; 1253 if (q && *q) { 1254 if (*q == '/') 1255 working->pid_file = strdup(q); 1256 else if (isdigit(*q)) 1257 goto got_sig; 1258 else 1259 errx(1, 1260 "illegal pid file or signal number in config file:\n%s", 1261 errline); 1262 } 1263 if (eol) 1264 q = NULL; 1265 else { 1266 q = parse = sob(++parse); /* Optional field */ 1267 *(parse = son(parse)) = '\0'; 1268 } 1269 1270 working->sig = SIGHUP; 1271 if (q && *q) { 1272 if (isdigit(*q)) { 1273 got_sig: 1274 working->sig = atoi(q); 1275 } else { 1276 err_sig: 1277 errx(1, 1278 "illegal signal number in config file:\n%s", 1279 errline); 1280 } 1281 if (working->sig < 1 || working->sig >= NSIG) 1282 goto err_sig; 1283 } 1284 1285 /* 1286 * Finish figuring out what pid-file to use (if any) in 1287 * later processing if this logfile needs to be rotated. 1288 */ 1289 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) { 1290 /* 1291 * This config-entry specified 'n' for nosignal, 1292 * see if it also specified an explicit pid_file. 1293 * This would be a pretty pointless combination. 1294 */ 1295 if (working->pid_file != NULL) { 1296 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s", 1297 working->pid_file, errline); 1298 free(working->pid_file); 1299 working->pid_file = NULL; 1300 } 1301 } else if (working->pid_file == NULL) { 1302 /* 1303 * This entry did not specify the 'n' flag, which 1304 * means it should signal syslogd unless it had 1305 * specified some other pid-file (and obviously the 1306 * syslog pid-file will not be for a process-group). 1307 * Also, we should only try to notify syslog if we 1308 * are root. 1309 */ 1310 if (working->flags & CE_SIGNALGROUP) { 1311 warnx("Ignoring flag 'U' in line:\n%s", 1312 errline); 1313 working->flags &= ~CE_SIGNALGROUP; 1314 } 1315 if (needroot) 1316 working->pid_file = strdup(_PATH_SYSLOGPID); 1317 } 1318 1319 /* 1320 * Add this entry to the appropriate list of entries, unless 1321 * it was some kind of special entry (eg: <default>). 1322 */ 1323 if (special) { 1324 ; /* Do not add to any list */ 1325 } else if (working->flags & CE_GLOB) { 1326 if (!*glob_p) 1327 *glob_p = working; 1328 else 1329 lastglob->next = working; 1330 lastglob = working; 1331 } else { 1332 if (!*work_p) 1333 *work_p = working; 1334 else 1335 lastwork->next = working; 1336 lastwork = working; 1337 } 1338 } 1339 if (errline != NULL) 1340 free(errline); 1341 } 1342 1343 static char * 1344 missing_field(char *p, char *errline) 1345 { 1346 1347 if (!p || !*p) 1348 errx(1, "missing field in config file:\n%s", errline); 1349 return (p); 1350 } 1351 1352 static fk_entry 1353 do_rotate(const struct conf_entry *ent) 1354 { 1355 char dirpart[MAXPATHLEN], namepart[MAXPATHLEN]; 1356 char file1[MAXPATHLEN], file2[MAXPATHLEN]; 1357 char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN]; 1358 char jfile1[MAXPATHLEN]; 1359 int flags, numlogs_c; 1360 fk_entry free_or_keep; 1361 struct sigwork_entry *swork; 1362 struct stat st; 1363 1364 flags = ent->flags; 1365 free_or_keep = FREE_ENT; 1366 1367 if (archtodir) { 1368 char *p; 1369 1370 /* build complete name of archive directory into dirpart */ 1371 if (*archdirname == '/') { /* absolute */ 1372 strlcpy(dirpart, archdirname, sizeof(dirpart)); 1373 } else { /* relative */ 1374 /* get directory part of logfile */ 1375 strlcpy(dirpart, ent->log, sizeof(dirpart)); 1376 if ((p = strrchr(dirpart, '/')) == NULL) 1377 dirpart[0] = '\0'; 1378 else 1379 *(p + 1) = '\0'; 1380 strlcat(dirpart, archdirname, sizeof(dirpart)); 1381 } 1382 1383 /* check if archive directory exists, if not, create it */ 1384 if (lstat(dirpart, &st)) 1385 createdir(ent, dirpart); 1386 1387 /* get filename part of logfile */ 1388 if ((p = strrchr(ent->log, '/')) == NULL) 1389 strlcpy(namepart, ent->log, sizeof(namepart)); 1390 else 1391 strlcpy(namepart, p + 1, sizeof(namepart)); 1392 1393 /* name of oldest log */ 1394 snprintf(file1, sizeof(file1), "%s/%s.%d", dirpart, 1395 namepart, ent->numlogs); 1396 snprintf(zfile1, sizeof(zfile1), "%s%s", file1, 1397 COMPRESS_POSTFIX); 1398 snprintf(jfile1, sizeof(jfile1), "%s%s", file1, 1399 BZCOMPRESS_POSTFIX); 1400 } else { 1401 /* name of oldest log */ 1402 snprintf(file1, sizeof(file1), "%s.%d", ent->log, 1403 ent->numlogs); 1404 snprintf(zfile1, sizeof(zfile1), "%s%s", file1, 1405 COMPRESS_POSTFIX); 1406 snprintf(jfile1, sizeof(jfile1), "%s%s", file1, 1407 BZCOMPRESS_POSTFIX); 1408 } 1409 1410 if (noaction) { 1411 printf("\trm -f %s\n", file1); 1412 printf("\trm -f %s\n", zfile1); 1413 printf("\trm -f %s\n", jfile1); 1414 } else { 1415 unlink(file1); 1416 unlink(zfile1); 1417 unlink(jfile1); 1418 } 1419 1420 /* Move down log files */ 1421 numlogs_c = ent->numlogs; /* copy for countdown */ 1422 while (numlogs_c--) { 1423 1424 strlcpy(file2, file1, sizeof(file2)); 1425 1426 if (archtodir) 1427 snprintf(file1, sizeof(file1), "%s/%s.%d", 1428 dirpart, namepart, numlogs_c); 1429 else 1430 snprintf(file1, sizeof(file1), "%s.%d", ent->log, 1431 numlogs_c); 1432 1433 strlcpy(zfile1, file1, sizeof(zfile1)); 1434 strlcpy(zfile2, file2, sizeof(zfile2)); 1435 if (lstat(file1, &st)) { 1436 strlcat(zfile1, COMPRESS_POSTFIX, 1437 sizeof(zfile1)); 1438 strlcat(zfile2, COMPRESS_POSTFIX, 1439 sizeof(zfile2)); 1440 if (lstat(zfile1, &st)) { 1441 strlcpy(zfile1, file1, sizeof(zfile1)); 1442 strlcpy(zfile2, file2, sizeof(zfile2)); 1443 strlcat(zfile1, BZCOMPRESS_POSTFIX, 1444 sizeof(zfile1)); 1445 strlcat(zfile2, BZCOMPRESS_POSTFIX, 1446 sizeof(zfile2)); 1447 if (lstat(zfile1, &st)) 1448 continue; 1449 } 1450 } 1451 if (noaction) 1452 printf("\tmv %s %s\n", zfile1, zfile2); 1453 else { 1454 /* XXX - Ought to be checking for failure! */ 1455 rename(zfile1, zfile2); 1456 } 1457 change_attrs(zfile2, ent); 1458 } 1459 1460 if (ent->numlogs > 0) { 1461 if (noaction) { 1462 /* 1463 * Note that savelog() may succeed with using link() 1464 * for the archtodir case, but there is no good way 1465 * of knowing if it will when doing "noaction", so 1466 * here we claim that it will have to do a copy... 1467 */ 1468 if (archtodir) 1469 printf("\tcp %s %s\n", ent->log, file1); 1470 else 1471 printf("\tln %s %s\n", ent->log, file1); 1472 } else { 1473 if (!(flags & CE_BINARY)) { 1474 /* Report the trimming to the old log */ 1475 log_trim(ent->log, ent); 1476 } 1477 savelog(ent->log, file1); 1478 } 1479 change_attrs(file1, ent); 1480 } 1481 1482 /* Create the new log file and move it into place */ 1483 if (noaction) 1484 printf("Start new log...\n"); 1485 createlog(ent); 1486 1487 /* 1488 * Save all signalling and file-compression to be done after log 1489 * files from all entries have been rotated. This way any one 1490 * process will not be sent the same signal multiple times when 1491 * multiple log files had to be rotated. 1492 */ 1493 swork = NULL; 1494 if (ent->pid_file != NULL) 1495 swork = save_sigwork(ent); 1496 if (ent->numlogs > 0 && (flags & (CE_COMPACT | CE_BZCOMPACT))) { 1497 /* 1498 * The zipwork_entry will include a pointer to this 1499 * conf_entry, so the conf_entry should not be freed. 1500 */ 1501 free_or_keep = KEEP_ENT; 1502 save_zipwork(ent, swork, ent->fsize, file1); 1503 } 1504 1505 return (free_or_keep); 1506 } 1507 1508 static void 1509 do_sigwork(struct sigwork_entry *swork) 1510 { 1511 struct sigwork_entry *nextsig; 1512 int kres, secs; 1513 1514 if (!(swork->sw_pidok) || swork->sw_pid == 0) 1515 return; /* no work to do... */ 1516 1517 /* 1518 * If nosignal (-s) was specified, then do not signal any process. 1519 * Note that a nosignal request triggers a warning message if the 1520 * rotated logfile needs to be compressed, *unless* -R was also 1521 * specified. We assume that an `-sR' request came from a process 1522 * which writes to the logfile, and as such, we assume that process 1523 * has already made sure the logfile is not presently in use. This 1524 * just sets swork->sw_pidok to a special value, and do_zipwork 1525 * will print any necessary warning(s). 1526 */ 1527 if (nosignal) { 1528 if (!rotatereq) 1529 swork->sw_pidok = -1; 1530 return; 1531 } 1532 1533 /* 1534 * Compute the pause between consecutive signals. Use a longer 1535 * sleep time if we will be sending two signals to the same 1536 * deamon or process-group. 1537 */ 1538 secs = 0; 1539 nextsig = SLIST_NEXT(swork, sw_nextp); 1540 if (nextsig != NULL) { 1541 if (swork->sw_pid == nextsig->sw_pid) 1542 secs = 10; 1543 else 1544 secs = 1; 1545 } 1546 1547 if (noaction) { 1548 printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum, 1549 (int)swork->sw_pid, swork->sw_fname); 1550 if (secs > 0) 1551 printf("\tsleep %d\n", secs); 1552 return; 1553 } 1554 1555 kres = kill(swork->sw_pid, swork->sw_signum); 1556 if (kres != 0) { 1557 /* 1558 * Assume that "no such process" (ESRCH) is something 1559 * to warn about, but is not an error. Presumably the 1560 * process which writes to the rotated log file(s) is 1561 * gone, in which case we should have no problem with 1562 * compressing the rotated log file(s). 1563 */ 1564 if (errno != ESRCH) 1565 swork->sw_pidok = 0; 1566 warn("can't notify %s, pid %d", swork->sw_pidtype, 1567 (int)swork->sw_pid); 1568 } else { 1569 if (verbose) 1570 printf("Notified %s pid %d = %s\n", swork->sw_pidtype, 1571 (int)swork->sw_pid, swork->sw_fname); 1572 if (secs > 0) { 1573 if (verbose) 1574 printf("Pause %d second(s) between signals\n", 1575 secs); 1576 sleep(secs); 1577 } 1578 } 1579 } 1580 1581 static void 1582 do_zipwork(struct zipwork_entry *zwork) 1583 { 1584 const char *pgm_name, *pgm_path; 1585 int errsav, fcount, zstatus; 1586 pid_t pidzip, wpid; 1587 char zresult[MAXPATHLEN]; 1588 1589 pgm_path = NULL; 1590 strlcpy(zresult, zwork->zw_fname, sizeof(zresult)); 1591 if (zwork != NULL && zwork->zw_conf != NULL) { 1592 if (zwork->zw_conf->flags & CE_COMPACT) { 1593 pgm_path = _PATH_GZIP; 1594 strlcat(zresult, COMPRESS_POSTFIX, sizeof(zresult)); 1595 } else if (zwork->zw_conf->flags & CE_BZCOMPACT) { 1596 pgm_path = _PATH_BZIP2; 1597 strlcat(zresult, BZCOMPRESS_POSTFIX, sizeof(zresult)); 1598 } 1599 } 1600 if (pgm_path == NULL) { 1601 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname); 1602 return; 1603 } 1604 pgm_name = strrchr(pgm_path, '/'); 1605 if (pgm_name == NULL) 1606 pgm_name = pgm_path; 1607 else 1608 pgm_name++; 1609 1610 if (zwork->zw_swork != NULL && zwork->zw_swork->sw_pidok <= 0) { 1611 warnx( 1612 "log %s not compressed because daemon(s) not notified", 1613 zwork->zw_fname); 1614 change_attrs(zwork->zw_fname, zwork->zw_conf); 1615 return; 1616 } 1617 1618 if (noaction) { 1619 printf("\t%s %s\n", pgm_name, zwork->zw_fname); 1620 change_attrs(zresult, zwork->zw_conf); 1621 return; 1622 } 1623 1624 fcount = 1; 1625 pidzip = fork(); 1626 while (pidzip < 0) { 1627 /* 1628 * The fork failed. If the failure was due to a temporary 1629 * problem, then wait a short time and try it again. 1630 */ 1631 errsav = errno; 1632 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname); 1633 if (errsav != EAGAIN || fcount > 5) 1634 errx(1, "Exiting..."); 1635 sleep(fcount * 12); 1636 fcount++; 1637 pidzip = fork(); 1638 } 1639 if (!pidzip) { 1640 /* The child process executes the compression command */ 1641 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, NULL); 1642 err(1, "execl(`%s -f %s')", pgm_path, zwork->zw_fname); 1643 } 1644 1645 wpid = waitpid(pidzip, &zstatus, 0); 1646 if (wpid == -1) { 1647 /* XXX - should this be a fatal error? */ 1648 warn("%s: waitpid(%d)", pgm_path, pidzip); 1649 return; 1650 } 1651 if (!WIFEXITED(zstatus)) { 1652 warnx("`%s -f %s' did not terminate normally", pgm_name, 1653 zwork->zw_fname); 1654 return; 1655 } 1656 if (WEXITSTATUS(zstatus)) { 1657 warnx("`%s -f %s' terminated with a non-zero status (%d)", 1658 pgm_name, zwork->zw_fname, WEXITSTATUS(zstatus)); 1659 return; 1660 } 1661 1662 /* Compression was successful, set file attributes on the result. */ 1663 change_attrs(zresult, zwork->zw_conf); 1664 } 1665 1666 /* 1667 * Save information on any process we need to signal. Any single 1668 * process may need to be sent different signal-values for different 1669 * log files, but usually a single signal-value will cause the process 1670 * to close and re-open all of it's log files. 1671 */ 1672 static struct sigwork_entry * 1673 save_sigwork(const struct conf_entry *ent) 1674 { 1675 struct sigwork_entry *sprev, *stmp; 1676 int ndiff; 1677 size_t tmpsiz; 1678 1679 sprev = NULL; 1680 ndiff = 1; 1681 SLIST_FOREACH(stmp, &swhead, sw_nextp) { 1682 ndiff = strcmp(ent->pid_file, stmp->sw_fname); 1683 if (ndiff > 0) 1684 break; 1685 if (ndiff == 0) { 1686 if (ent->sig == stmp->sw_signum) 1687 break; 1688 if (ent->sig > stmp->sw_signum) { 1689 ndiff = 1; 1690 break; 1691 } 1692 } 1693 sprev = stmp; 1694 } 1695 if (stmp != NULL && ndiff == 0) 1696 return (stmp); 1697 1698 tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_file) + 1; 1699 stmp = malloc(tmpsiz); 1700 set_swpid(stmp, ent); 1701 stmp->sw_signum = ent->sig; 1702 strcpy(stmp->sw_fname, ent->pid_file); 1703 if (sprev == NULL) 1704 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp); 1705 else 1706 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp); 1707 return (stmp); 1708 } 1709 1710 /* 1711 * Save information on any file we need to compress. We may see the same 1712 * file multiple times, so check the full list to avoid duplicates. The 1713 * list itself is sorted smallest-to-largest, because that's the order we 1714 * want to compress the files. If the partition is very low on disk space, 1715 * then the smallest files are the most likely to compress, and compressing 1716 * them first will free up more space for the larger files. 1717 */ 1718 static struct zipwork_entry * 1719 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork, 1720 int zsize, const char *zipfname) 1721 { 1722 struct zipwork_entry *zprev, *ztmp; 1723 int ndiff; 1724 size_t tmpsiz; 1725 1726 /* Compute the size if the caller did not know it. */ 1727 if (zsize < 0) 1728 zsize = sizefile(zipfname); 1729 1730 zprev = NULL; 1731 ndiff = 1; 1732 SLIST_FOREACH(ztmp, &zwhead, zw_nextp) { 1733 ndiff = strcmp(zipfname, ztmp->zw_fname); 1734 if (ndiff == 0) 1735 break; 1736 if (zsize > ztmp->zw_fsize) 1737 zprev = ztmp; 1738 } 1739 if (ztmp != NULL && ndiff == 0) 1740 return (ztmp); 1741 1742 tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1; 1743 ztmp = malloc(tmpsiz); 1744 ztmp->zw_conf = ent; 1745 ztmp->zw_swork = swork; 1746 ztmp->zw_fsize = zsize; 1747 strcpy(ztmp->zw_fname, zipfname); 1748 if (zprev == NULL) 1749 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp); 1750 else 1751 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp); 1752 return (ztmp); 1753 } 1754 1755 /* Send a signal to the pid specified by pidfile */ 1756 static void 1757 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent) 1758 { 1759 FILE *f; 1760 long minok, maxok, rval; 1761 char *endp, *linep, line[BUFSIZ]; 1762 1763 minok = MIN_PID; 1764 maxok = MAX_PID; 1765 swork->sw_pidok = 0; 1766 swork->sw_pid = 0; 1767 swork->sw_pidtype = "daemon"; 1768 if (ent->flags & CE_SIGNALGROUP) { 1769 /* 1770 * If we are expected to signal a process-group when 1771 * rotating this logfile, then the value read in should 1772 * be the negative of a valid process ID. 1773 */ 1774 minok = -MAX_PID; 1775 maxok = -MIN_PID; 1776 swork->sw_pidtype = "process-group"; 1777 } 1778 1779 f = fopen(ent->pid_file, "r"); 1780 if (f == NULL) { 1781 warn("can't open pid file: %s", ent->pid_file); 1782 return; 1783 } 1784 1785 if (fgets(line, BUFSIZ, f) == NULL) { 1786 /* 1787 * Warn if the PID file is empty, but do not consider 1788 * it an error. Most likely it means the process has 1789 * has terminated, so it should be safe to rotate any 1790 * log files that the process would have been using. 1791 */ 1792 if (feof(f)) { 1793 swork->sw_pidok = 1; 1794 warnx("pid file is empty: %s", ent->pid_file); 1795 } else 1796 warn("can't read from pid file: %s", ent->pid_file); 1797 fclose(f); 1798 return; 1799 } 1800 fclose(f); 1801 1802 errno = 0; 1803 linep = line; 1804 while (*linep == ' ') 1805 linep++; 1806 rval = strtol(linep, &endp, 10); 1807 if (*endp != '\0' && !isspacech(*endp)) { 1808 warnx("pid file does not start with a valid number: %s", 1809 ent->pid_file); 1810 } else if (rval < minok || rval > maxok) { 1811 warnx("bad value '%ld' for process number in %s", 1812 rval, ent->pid_file); 1813 if (verbose) 1814 warnx("\t(expecting value between %ld and %ld)", 1815 minok, maxok); 1816 } else { 1817 swork->sw_pidok = 1; 1818 swork->sw_pid = rval; 1819 } 1820 1821 return; 1822 } 1823 1824 /* Log the fact that the logs were turned over */ 1825 static int 1826 log_trim(const char *logname, const struct conf_entry *log_ent) 1827 { 1828 FILE *f; 1829 const char *xtra; 1830 1831 if ((f = fopen(logname, "a")) == NULL) 1832 return (-1); 1833 xtra = ""; 1834 if (log_ent->def_cfg) 1835 xtra = " using <default> rule"; 1836 if (log_ent->firstcreate) 1837 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n", 1838 daytime, hostname, (int) getpid(), xtra); 1839 else if (log_ent->r_reason != NULL) 1840 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n", 1841 daytime, hostname, (int) getpid(), log_ent->r_reason, xtra); 1842 else 1843 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n", 1844 daytime, hostname, (int) getpid(), xtra); 1845 if (fclose(f) == EOF) 1846 err(1, "log_trim: fclose"); 1847 return (0); 1848 } 1849 1850 /* Return size in kilobytes of a file */ 1851 static int 1852 sizefile(const char *file) 1853 { 1854 struct stat sb; 1855 1856 if (stat(file, &sb) < 0) 1857 return (-1); 1858 return (kbytes(dbtob(sb.st_blocks))); 1859 } 1860 1861 /* Return the age of old log file (file.0) */ 1862 static int 1863 age_old_log(char *file) 1864 { 1865 struct stat sb; 1866 char *endp; 1867 char tmp[MAXPATHLEN + sizeof(".0") + sizeof(COMPRESS_POSTFIX) + 1868 sizeof(BZCOMPRESS_POSTFIX) + 1]; 1869 1870 if (archtodir) { 1871 char *p; 1872 1873 /* build name of archive directory into tmp */ 1874 if (*archdirname == '/') { /* absolute */ 1875 strlcpy(tmp, archdirname, sizeof(tmp)); 1876 } else { /* relative */ 1877 /* get directory part of logfile */ 1878 strlcpy(tmp, file, sizeof(tmp)); 1879 if ((p = strrchr(tmp, '/')) == NULL) 1880 tmp[0] = '\0'; 1881 else 1882 *(p + 1) = '\0'; 1883 strlcat(tmp, archdirname, sizeof(tmp)); 1884 } 1885 1886 strlcat(tmp, "/", sizeof(tmp)); 1887 1888 /* get filename part of logfile */ 1889 if ((p = strrchr(file, '/')) == NULL) 1890 strlcat(tmp, file, sizeof(tmp)); 1891 else 1892 strlcat(tmp, p + 1, sizeof(tmp)); 1893 } else { 1894 strlcpy(tmp, file, sizeof(tmp)); 1895 } 1896 1897 strlcat(tmp, ".0", sizeof(tmp)); 1898 if (stat(tmp, &sb) < 0) { 1899 /* 1900 * A plain '.0' file does not exist. Try again, first 1901 * with the added suffix of '.gz', then with an added 1902 * suffix of '.bz2' instead of '.gz'. 1903 */ 1904 endp = strchr(tmp, '\0'); 1905 strlcat(tmp, COMPRESS_POSTFIX, sizeof(tmp)); 1906 if (stat(tmp, &sb) < 0) { 1907 *endp = '\0'; /* Remove .gz */ 1908 strlcat(tmp, BZCOMPRESS_POSTFIX, sizeof(tmp)); 1909 if (stat(tmp, &sb) < 0) 1910 return (-1); 1911 } 1912 } 1913 return ((int)(ptimeget_secs(timenow) - sb.st_mtime + 1800) / 3600); 1914 } 1915 1916 /* Skip Over Blanks */ 1917 static char * 1918 sob(char *p) 1919 { 1920 while (p && *p && isspace(*p)) 1921 p++; 1922 return (p); 1923 } 1924 1925 /* Skip Over Non-Blanks */ 1926 static char * 1927 son(char *p) 1928 { 1929 while (p && *p && !isspace(*p)) 1930 p++; 1931 return (p); 1932 } 1933 1934 /* Check if string is actually a number */ 1935 static int 1936 isnumberstr(const char *string) 1937 { 1938 while (*string) { 1939 if (!isdigitch(*string++)) 1940 return (0); 1941 } 1942 return (1); 1943 } 1944 1945 /* 1946 * Save the active log file under a new name. A link to the new name 1947 * is the quick-and-easy way to do this. If that fails (which it will 1948 * if the destination is on another partition), then make a copy of 1949 * the file to the new location. 1950 */ 1951 static void 1952 savelog(char *from, char *to) 1953 { 1954 FILE *src, *dst; 1955 int c, res; 1956 1957 res = link(from, to); 1958 if (res == 0) 1959 return; 1960 1961 if ((src = fopen(from, "r")) == NULL) 1962 err(1, "can't fopen %s for reading", from); 1963 if ((dst = fopen(to, "w")) == NULL) 1964 err(1, "can't fopen %s for writing", to); 1965 1966 while ((c = getc(src)) != EOF) { 1967 if ((putc(c, dst)) == EOF) 1968 err(1, "error writing to %s", to); 1969 } 1970 1971 if (ferror(src)) 1972 err(1, "error reading from %s", from); 1973 if ((fclose(src)) != 0) 1974 err(1, "can't fclose %s", to); 1975 if ((fclose(dst)) != 0) 1976 err(1, "can't fclose %s", from); 1977 } 1978 1979 /* create one or more directory components of a path */ 1980 static void 1981 createdir(const struct conf_entry *ent, char *dirpart) 1982 { 1983 int res; 1984 char *s, *d; 1985 char mkdirpath[MAXPATHLEN]; 1986 struct stat st; 1987 1988 s = dirpart; 1989 d = mkdirpath; 1990 1991 for (;;) { 1992 *d++ = *s++; 1993 if (*s != '/' && *s != '\0') 1994 continue; 1995 *d = '\0'; 1996 res = lstat(mkdirpath, &st); 1997 if (res != 0) { 1998 if (noaction) { 1999 printf("\tmkdir %s\n", mkdirpath); 2000 } else { 2001 res = mkdir(mkdirpath, 0755); 2002 if (res != 0) 2003 err(1, "Error on mkdir(\"%s\") for -a", 2004 mkdirpath); 2005 } 2006 } 2007 if (*s == '\0') 2008 break; 2009 } 2010 if (verbose) { 2011 if (ent->firstcreate) 2012 printf("Created directory '%s' for new %s\n", 2013 dirpart, ent->log); 2014 else 2015 printf("Created directory '%s' for -a\n", dirpart); 2016 } 2017 } 2018 2019 /* 2020 * Create a new log file, destroying any currently-existing version 2021 * of the log file in the process. If the caller wants a backup copy 2022 * of the file to exist, they should call 'link(logfile,logbackup)' 2023 * before calling this routine. 2024 */ 2025 void 2026 createlog(const struct conf_entry *ent) 2027 { 2028 int fd, failed; 2029 struct stat st; 2030 char *realfile, *slash, tempfile[MAXPATHLEN]; 2031 2032 fd = -1; 2033 realfile = ent->log; 2034 2035 /* 2036 * If this log file is being created for the first time (-C option), 2037 * then it may also be true that the parent directory does not exist 2038 * yet. Check, and create that directory if it is missing. 2039 */ 2040 if (ent->firstcreate) { 2041 strlcpy(tempfile, realfile, sizeof(tempfile)); 2042 slash = strrchr(tempfile, '/'); 2043 if (slash != NULL) { 2044 *slash = '\0'; 2045 failed = stat(tempfile, &st); 2046 if (failed && errno != ENOENT) 2047 err(1, "Error on stat(%s)", tempfile); 2048 if (failed) 2049 createdir(ent, tempfile); 2050 else if (!S_ISDIR(st.st_mode)) 2051 errx(1, "%s exists but is not a directory", 2052 tempfile); 2053 } 2054 } 2055 2056 /* 2057 * First create an unused filename, so it can be chown'ed and 2058 * chmod'ed before it is moved into the real location. mkstemp 2059 * will create the file mode=600 & owned by us. Note that all 2060 * temp files will have a suffix of '.z<something>'. 2061 */ 2062 strlcpy(tempfile, realfile, sizeof(tempfile)); 2063 strlcat(tempfile, ".zXXXXXX", sizeof(tempfile)); 2064 if (noaction) 2065 printf("\tmktemp %s\n", tempfile); 2066 else { 2067 fd = mkstemp(tempfile); 2068 if (fd < 0) 2069 err(1, "can't mkstemp logfile %s", tempfile); 2070 2071 /* 2072 * Add status message to what will become the new log file. 2073 */ 2074 if (!(ent->flags & CE_BINARY)) { 2075 if (log_trim(tempfile, ent)) 2076 err(1, "can't add status message to log"); 2077 } 2078 } 2079 2080 /* Change the owner/group, if we are supposed to */ 2081 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2082 if (noaction) 2083 printf("\tchown %u:%u %s\n", ent->uid, ent->gid, 2084 tempfile); 2085 else { 2086 failed = fchown(fd, ent->uid, ent->gid); 2087 if (failed) 2088 err(1, "can't fchown temp file %s", tempfile); 2089 } 2090 } 2091 2092 /* Turn on NODUMP if it was requested in the config-file. */ 2093 if (ent->flags & CE_NODUMP) { 2094 if (noaction) 2095 printf("\tchflags nodump %s\n", tempfile); 2096 else { 2097 failed = fchflags(fd, UF_NODUMP); 2098 if (failed) { 2099 warn("log_trim: fchflags(NODUMP)"); 2100 } 2101 } 2102 } 2103 2104 /* 2105 * Note that if the real logfile still exists, and if the call 2106 * to rename() fails, then "neither the old file nor the new 2107 * file shall be changed or created" (to quote the standard). 2108 * If the call succeeds, then the file will be replaced without 2109 * any window where some other process might find that the file 2110 * did not exist. 2111 * XXX - ? It may be that for some error conditions, we could 2112 * retry by first removing the realfile and then renaming. 2113 */ 2114 if (noaction) { 2115 printf("\tchmod %o %s\n", ent->permissions, tempfile); 2116 printf("\tmv %s %s\n", tempfile, realfile); 2117 } else { 2118 failed = fchmod(fd, ent->permissions); 2119 if (failed) 2120 err(1, "can't fchmod temp file '%s'", tempfile); 2121 failed = rename(tempfile, realfile); 2122 if (failed) 2123 err(1, "can't mv %s to %s", tempfile, realfile); 2124 } 2125 2126 if (fd >= 0) 2127 close(fd); 2128 } 2129 2130 /* 2131 * Change the attributes of a given filename to what was specified in 2132 * the newsyslog.conf entry. This routine is only called for files 2133 * that newsyslog expects that it has created, and thus it is a fatal 2134 * error if this routine finds that the file does not exist. 2135 */ 2136 static void 2137 change_attrs(const char *fname, const struct conf_entry *ent) 2138 { 2139 int failed; 2140 2141 if (noaction) { 2142 printf("\tchmod %o %s\n", ent->permissions, fname); 2143 2144 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) 2145 printf("\tchown %u:%u %s\n", 2146 ent->uid, ent->gid, fname); 2147 2148 if (ent->flags & CE_NODUMP) 2149 printf("\tchflags nodump %s\n", fname); 2150 return; 2151 } 2152 2153 failed = chmod(fname, ent->permissions); 2154 if (failed) { 2155 if (errno != EPERM) 2156 err(1, "chmod(%s) in change_attrs", fname); 2157 warn("change_attrs couldn't chmod(%s)", fname); 2158 } 2159 2160 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2161 failed = chown(fname, ent->uid, ent->gid); 2162 if (failed) 2163 warn("can't chown %s", fname); 2164 } 2165 2166 if (ent->flags & CE_NODUMP) { 2167 failed = chflags(fname, UF_NODUMP); 2168 if (failed) 2169 warn("can't chflags %s NODUMP", fname); 2170 } 2171 } 2172