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, i; 893 char *mfname; 894 struct conf_entry *dupent, *ent, *firstmatch, *globent; 895 struct conf_entry *lastmatch; 896 glob_t pglob; 897 struct stat st_fm; 898 899 if ((glob_p == NULL) || (*glob_p == NULL)) 900 return; /* There is nothing to do. */ 901 902 /* 903 * The worklist contains all fully-specified (non-GLOB) names. 904 * 905 * Now expand the list of filename-pattern (GLOB) entries into 906 * a second list, which (by definition) will only match files 907 * that already exist. Do not add a glob-related entry for any 908 * file which already exists in the fully-specified list. 909 */ 910 firstmatch = lastmatch = NULL; 911 for (globent = *glob_p; globent; globent = globent->next) { 912 913 gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob); 914 if (gres != 0) { 915 warn("cannot expand pattern (%d): %s", gres, 916 globent->log); 917 continue; 918 } 919 920 if (verbose > 2) 921 printf("\t+ Expanding pattern %s\n", globent->log); 922 for (i = 0; i < pglob.gl_matchc; i++) { 923 mfname = pglob.gl_pathv[i]; 924 925 /* See if this file already has a specific entry. */ 926 gmatch = 0; 927 for (ent = *work_p; ent; ent = ent->next) { 928 if (strcmp(mfname, ent->log) == 0) { 929 gmatch++; 930 break; 931 } 932 } 933 if (gmatch) 934 continue; 935 936 /* Make sure the named matched is a file. */ 937 gres = lstat(mfname, &st_fm); 938 if (gres != 0) { 939 /* Error on a file that glob() matched?!? */ 940 warn("Skipping %s - lstat() error", mfname); 941 continue; 942 } 943 if (!S_ISREG(st_fm.st_mode)) { 944 /* We only rotate files! */ 945 if (verbose > 2) 946 printf("\t+ . skipping %s (!file)\n", 947 mfname); 948 continue; 949 } 950 951 if (verbose > 2) 952 printf("\t+ . add file %s\n", mfname); 953 dupent = init_entry(mfname, globent); 954 if (!firstmatch) 955 firstmatch = dupent; 956 else 957 lastmatch->next = dupent; 958 lastmatch = dupent; 959 /* This new entry is not a glob! */ 960 dupent->flags &= ~CE_GLOB; 961 } 962 globfree(&pglob); 963 if (verbose > 2) 964 printf("\t+ Done with pattern %s\n", globent->log); 965 } 966 967 /* Add the list of matched files to the end of the worklist. */ 968 if (!*work_p) 969 *work_p = firstmatch; 970 else { 971 ent = *work_p; 972 while (ent->next) 973 ent = ent->next; 974 ent->next = firstmatch; 975 } 976 977 } 978 979 /* 980 * Parse a configuration file and update a linked list of all the logs to 981 * process. 982 */ 983 static void 984 parse_file(FILE *cf, const char *cfname, struct conf_entry **work_p, 985 struct conf_entry **glob_p, struct conf_entry **defconf_p) 986 { 987 char line[BUFSIZ], *parse, *q; 988 char *cp, *errline, *group; 989 struct conf_entry *lastglob, *lastwork, *working; 990 struct passwd *pwd; 991 struct group *grp; 992 int eol, ptm_opts, res, special; 993 994 /* 995 * XXX - for now, assume that only one config file will be read, 996 * ie, this routine is only called one time. 997 */ 998 lastglob = lastwork = NULL; 999 1000 errline = NULL; 1001 while (fgets(line, BUFSIZ, cf)) { 1002 if ((line[0] == '\n') || (line[0] == '#') || 1003 (strlen(line) == 0)) 1004 continue; 1005 if (errline != NULL) 1006 free(errline); 1007 errline = strdup(line); 1008 for (cp = line + 1; *cp != '\0'; cp++) { 1009 if (*cp != '#') 1010 continue; 1011 if (*(cp - 1) == '\\') { 1012 strcpy(cp - 1, cp); 1013 cp--; 1014 continue; 1015 } 1016 *cp = '\0'; 1017 break; 1018 } 1019 1020 q = parse = missing_field(sob(line), errline); 1021 parse = son(line); 1022 if (!*parse) 1023 errx(1, "malformed line (missing fields):\n%s", 1024 errline); 1025 *parse = '\0'; 1026 1027 /* 1028 * Allow people to set debug options via the config file. 1029 * (NOTE: debug optons are undocumented, and may disappear 1030 * at any time, etc). 1031 */ 1032 if (strcasecmp(DEBUG_MARKER, q) == 0) { 1033 q = parse = missing_field(sob(++parse), errline); 1034 parse = son(parse); 1035 if (!*parse) 1036 warnx("debug line specifies no option:\n%s", 1037 errline); 1038 else { 1039 *parse = '\0'; 1040 parse_doption(q); 1041 } 1042 continue; 1043 } 1044 1045 special = 0; 1046 working = init_entry(q, NULL); 1047 if (strcasecmp(DEFAULT_MARKER, q) == 0) { 1048 special = 1; 1049 if (defconf_p == NULL) { 1050 warnx("Ignoring entry for %s in %s!", q, 1051 cfname); 1052 free_entry(working); 1053 continue; 1054 } else if (*defconf_p != NULL) { 1055 warnx("Ignoring duplicate entry for %s!", q); 1056 free_entry(working); 1057 continue; 1058 } 1059 *defconf_p = working; 1060 } 1061 1062 q = parse = missing_field(sob(++parse), errline); 1063 parse = son(parse); 1064 if (!*parse) 1065 errx(1, "malformed line (missing fields):\n%s", 1066 errline); 1067 *parse = '\0'; 1068 if ((group = strchr(q, ':')) != NULL || 1069 (group = strrchr(q, '.')) != NULL) { 1070 *group++ = '\0'; 1071 if (*q) { 1072 if (!(isnumberstr(q))) { 1073 if ((pwd = getpwnam(q)) == NULL) 1074 errx(1, 1075 "error in config file; unknown user:\n%s", 1076 errline); 1077 working->uid = pwd->pw_uid; 1078 } else 1079 working->uid = atoi(q); 1080 } else 1081 working->uid = (uid_t)-1; 1082 1083 q = group; 1084 if (*q) { 1085 if (!(isnumberstr(q))) { 1086 if ((grp = getgrnam(q)) == NULL) 1087 errx(1, 1088 "error in config file; unknown group:\n%s", 1089 errline); 1090 working->gid = grp->gr_gid; 1091 } else 1092 working->gid = atoi(q); 1093 } else 1094 working->gid = (gid_t)-1; 1095 1096 q = parse = missing_field(sob(++parse), errline); 1097 parse = son(parse); 1098 if (!*parse) 1099 errx(1, "malformed line (missing fields):\n%s", 1100 errline); 1101 *parse = '\0'; 1102 } else { 1103 working->uid = (uid_t)-1; 1104 working->gid = (gid_t)-1; 1105 } 1106 1107 if (!sscanf(q, "%o", &working->permissions)) 1108 errx(1, "error in config file; bad permissions:\n%s", 1109 errline); 1110 1111 q = parse = missing_field(sob(++parse), errline); 1112 parse = son(parse); 1113 if (!*parse) 1114 errx(1, "malformed line (missing fields):\n%s", 1115 errline); 1116 *parse = '\0'; 1117 if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0) 1118 errx(1, "error in config file; bad value for count of logs to save:\n%s", 1119 errline); 1120 1121 q = parse = missing_field(sob(++parse), errline); 1122 parse = son(parse); 1123 if (!*parse) 1124 errx(1, "malformed line (missing fields):\n%s", 1125 errline); 1126 *parse = '\0'; 1127 if (isdigitch(*q)) 1128 working->trsize = atoi(q); 1129 else if (strcmp(q, "*") == 0) 1130 working->trsize = -1; 1131 else { 1132 warnx("Invalid value of '%s' for 'size' in line:\n%s", 1133 q, errline); 1134 working->trsize = -1; 1135 } 1136 1137 working->flags = 0; 1138 q = parse = missing_field(sob(++parse), errline); 1139 parse = son(parse); 1140 eol = !*parse; 1141 *parse = '\0'; 1142 { 1143 char *ep; 1144 u_long ul; 1145 1146 ul = strtoul(q, &ep, 10); 1147 if (ep == q) 1148 working->hours = 0; 1149 else if (*ep == '*') 1150 working->hours = -1; 1151 else if (ul > INT_MAX) 1152 errx(1, "interval is too large:\n%s", errline); 1153 else 1154 working->hours = ul; 1155 1156 if (*ep == '\0' || strcmp(ep, "*") == 0) 1157 goto no_trimat; 1158 if (*ep != '@' && *ep != '$') 1159 errx(1, "malformed interval/at:\n%s", errline); 1160 1161 working->flags |= CE_TRIMAT; 1162 working->trim_at = ptime_init(NULL); 1163 ptm_opts = PTM_PARSE_ISO8601; 1164 if (*ep == '$') 1165 ptm_opts = PTM_PARSE_DWM; 1166 ptm_opts |= PTM_PARSE_MATCHDOM; 1167 res = ptime_relparse(working->trim_at, ptm_opts, 1168 ptimeget_secs(timenow), ep + 1); 1169 if (res == -2) 1170 errx(1, "nonexistent time for 'at' value:\n%s", 1171 errline); 1172 else if (res < 0) 1173 errx(1, "malformed 'at' value:\n%s", errline); 1174 } 1175 no_trimat: 1176 1177 if (eol) 1178 q = NULL; 1179 else { 1180 q = parse = sob(++parse); /* Optional field */ 1181 parse = son(parse); 1182 if (!*parse) 1183 eol = 1; 1184 *parse = '\0'; 1185 } 1186 1187 for (; q && *q && !isspacech(*q); q++) { 1188 switch (tolowerch(*q)) { 1189 case 'b': 1190 working->flags |= CE_BINARY; 1191 break; 1192 case 'c': 1193 /* 1194 * XXX - Ick! Ugly! Remove ASAP! 1195 * We want `c' and `C' for "create". But we 1196 * will temporarily treat `c' as `g', because 1197 * FreeBSD releases <= 4.8 have a typo of 1198 * checking ('G' || 'c') for CE_GLOB. 1199 */ 1200 if (*q == 'c') { 1201 warnx("Assuming 'g' for 'c' in flags for line:\n%s", 1202 errline); 1203 warnx("The 'c' flag will eventually mean 'CREATE'"); 1204 working->flags |= CE_GLOB; 1205 break; 1206 } 1207 working->flags |= CE_CREATE; 1208 break; 1209 case 'd': 1210 working->flags |= CE_NODUMP; 1211 break; 1212 case 'g': 1213 working->flags |= CE_GLOB; 1214 break; 1215 case 'j': 1216 working->flags |= CE_BZCOMPACT; 1217 break; 1218 case 'n': 1219 working->flags |= CE_NOSIGNAL; 1220 break; 1221 case 'u': 1222 working->flags |= CE_SIGNALGROUP; 1223 break; 1224 case 'w': 1225 /* Deprecated flag - keep for compatibility purposes */ 1226 break; 1227 case 'z': 1228 working->flags |= CE_COMPACT; 1229 break; 1230 case '-': 1231 break; 1232 case 'f': /* Used by OpenBSD for "CE_FOLLOW" */ 1233 case 'm': /* Used by OpenBSD for "CE_MONITOR" */ 1234 case 'p': /* Used by NetBSD for "CE_PLAIN0" */ 1235 default: 1236 errx(1, "illegal flag in config file -- %c", 1237 *q); 1238 } 1239 } 1240 1241 if (eol) 1242 q = NULL; 1243 else { 1244 q = parse = sob(++parse); /* Optional field */ 1245 parse = son(parse); 1246 if (!*parse) 1247 eol = 1; 1248 *parse = '\0'; 1249 } 1250 1251 working->pid_file = NULL; 1252 if (q && *q) { 1253 if (*q == '/') 1254 working->pid_file = strdup(q); 1255 else if (isdigit(*q)) 1256 goto got_sig; 1257 else 1258 errx(1, 1259 "illegal pid file or signal number in config file:\n%s", 1260 errline); 1261 } 1262 if (eol) 1263 q = NULL; 1264 else { 1265 q = parse = sob(++parse); /* Optional field */ 1266 *(parse = son(parse)) = '\0'; 1267 } 1268 1269 working->sig = SIGHUP; 1270 if (q && *q) { 1271 if (isdigit(*q)) { 1272 got_sig: 1273 working->sig = atoi(q); 1274 } else { 1275 err_sig: 1276 errx(1, 1277 "illegal signal number in config file:\n%s", 1278 errline); 1279 } 1280 if (working->sig < 1 || working->sig >= NSIG) 1281 goto err_sig; 1282 } 1283 1284 /* 1285 * Finish figuring out what pid-file to use (if any) in 1286 * later processing if this logfile needs to be rotated. 1287 */ 1288 if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) { 1289 /* 1290 * This config-entry specified 'n' for nosignal, 1291 * see if it also specified an explicit pid_file. 1292 * This would be a pretty pointless combination. 1293 */ 1294 if (working->pid_file != NULL) { 1295 warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s", 1296 working->pid_file, errline); 1297 free(working->pid_file); 1298 working->pid_file = NULL; 1299 } 1300 } else if (working->pid_file == NULL) { 1301 /* 1302 * This entry did not specify the 'n' flag, which 1303 * means it should signal syslogd unless it had 1304 * specified some other pid-file (and obviously the 1305 * syslog pid-file will not be for a process-group). 1306 * Also, we should only try to notify syslog if we 1307 * are root. 1308 */ 1309 if (working->flags & CE_SIGNALGROUP) { 1310 warnx("Ignoring flag 'U' in line:\n%s", 1311 errline); 1312 working->flags &= ~CE_SIGNALGROUP; 1313 } 1314 if (needroot) 1315 working->pid_file = strdup(_PATH_SYSLOGPID); 1316 } 1317 1318 /* 1319 * Add this entry to the appropriate list of entries, unless 1320 * it was some kind of special entry (eg: <default>). 1321 */ 1322 if (special) { 1323 ; /* Do not add to any list */ 1324 } else if (working->flags & CE_GLOB) { 1325 if (!*glob_p) 1326 *glob_p = working; 1327 else 1328 lastglob->next = working; 1329 lastglob = working; 1330 } else { 1331 if (!*work_p) 1332 *work_p = working; 1333 else 1334 lastwork->next = working; 1335 lastwork = working; 1336 } 1337 } 1338 if (errline != NULL) 1339 free(errline); 1340 } 1341 1342 static char * 1343 missing_field(char *p, char *errline) 1344 { 1345 1346 if (!p || !*p) 1347 errx(1, "missing field in config file:\n%s", errline); 1348 return (p); 1349 } 1350 1351 static fk_entry 1352 do_rotate(const struct conf_entry *ent) 1353 { 1354 char dirpart[MAXPATHLEN], namepart[MAXPATHLEN]; 1355 char file1[MAXPATHLEN], file2[MAXPATHLEN]; 1356 char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN]; 1357 char jfile1[MAXPATHLEN]; 1358 int flags, numlogs_c; 1359 fk_entry free_or_keep; 1360 struct sigwork_entry *swork; 1361 struct stat st; 1362 1363 flags = ent->flags; 1364 free_or_keep = FREE_ENT; 1365 1366 if (archtodir) { 1367 char *p; 1368 1369 /* build complete name of archive directory into dirpart */ 1370 if (*archdirname == '/') { /* absolute */ 1371 strlcpy(dirpart, archdirname, sizeof(dirpart)); 1372 } else { /* relative */ 1373 /* get directory part of logfile */ 1374 strlcpy(dirpart, ent->log, sizeof(dirpart)); 1375 if ((p = strrchr(dirpart, '/')) == NULL) 1376 dirpart[0] = '\0'; 1377 else 1378 *(p + 1) = '\0'; 1379 strlcat(dirpart, archdirname, sizeof(dirpart)); 1380 } 1381 1382 /* check if archive directory exists, if not, create it */ 1383 if (lstat(dirpart, &st)) 1384 createdir(ent, dirpart); 1385 1386 /* get filename part of logfile */ 1387 if ((p = strrchr(ent->log, '/')) == NULL) 1388 strlcpy(namepart, ent->log, sizeof(namepart)); 1389 else 1390 strlcpy(namepart, p + 1, sizeof(namepart)); 1391 1392 /* name of oldest log */ 1393 snprintf(file1, sizeof(file1), "%s/%s.%d", dirpart, 1394 namepart, ent->numlogs); 1395 snprintf(zfile1, sizeof(zfile1), "%s%s", file1, 1396 COMPRESS_POSTFIX); 1397 snprintf(jfile1, sizeof(jfile1), "%s%s", file1, 1398 BZCOMPRESS_POSTFIX); 1399 } else { 1400 /* name of oldest log */ 1401 snprintf(file1, sizeof(file1), "%s.%d", ent->log, 1402 ent->numlogs); 1403 snprintf(zfile1, sizeof(zfile1), "%s%s", file1, 1404 COMPRESS_POSTFIX); 1405 snprintf(jfile1, sizeof(jfile1), "%s%s", file1, 1406 BZCOMPRESS_POSTFIX); 1407 } 1408 1409 if (noaction) { 1410 printf("\trm -f %s\n", file1); 1411 printf("\trm -f %s\n", zfile1); 1412 printf("\trm -f %s\n", jfile1); 1413 } else { 1414 unlink(file1); 1415 unlink(zfile1); 1416 unlink(jfile1); 1417 } 1418 1419 /* Move down log files */ 1420 numlogs_c = ent->numlogs; /* copy for countdown */ 1421 while (numlogs_c--) { 1422 1423 strlcpy(file2, file1, sizeof(file2)); 1424 1425 if (archtodir) 1426 snprintf(file1, sizeof(file1), "%s/%s.%d", 1427 dirpart, namepart, numlogs_c); 1428 else 1429 snprintf(file1, sizeof(file1), "%s.%d", ent->log, 1430 numlogs_c); 1431 1432 strlcpy(zfile1, file1, sizeof(zfile1)); 1433 strlcpy(zfile2, file2, sizeof(zfile2)); 1434 if (lstat(file1, &st)) { 1435 strlcat(zfile1, COMPRESS_POSTFIX, 1436 sizeof(zfile1)); 1437 strlcat(zfile2, COMPRESS_POSTFIX, 1438 sizeof(zfile2)); 1439 if (lstat(zfile1, &st)) { 1440 strlcpy(zfile1, file1, sizeof(zfile1)); 1441 strlcpy(zfile2, file2, sizeof(zfile2)); 1442 strlcat(zfile1, BZCOMPRESS_POSTFIX, 1443 sizeof(zfile1)); 1444 strlcat(zfile2, BZCOMPRESS_POSTFIX, 1445 sizeof(zfile2)); 1446 if (lstat(zfile1, &st)) 1447 continue; 1448 } 1449 } 1450 if (noaction) 1451 printf("\tmv %s %s\n", zfile1, zfile2); 1452 else { 1453 /* XXX - Ought to be checking for failure! */ 1454 rename(zfile1, zfile2); 1455 } 1456 change_attrs(zfile2, ent); 1457 } 1458 1459 if (ent->numlogs > 0) { 1460 if (noaction) { 1461 /* 1462 * Note that savelog() may succeed with using link() 1463 * for the archtodir case, but there is no good way 1464 * of knowing if it will when doing "noaction", so 1465 * here we claim that it will have to do a copy... 1466 */ 1467 if (archtodir) 1468 printf("\tcp %s %s\n", ent->log, file1); 1469 else 1470 printf("\tln %s %s\n", ent->log, file1); 1471 } else { 1472 if (!(flags & CE_BINARY)) { 1473 /* Report the trimming to the old log */ 1474 log_trim(ent->log, ent); 1475 } 1476 savelog(ent->log, file1); 1477 } 1478 change_attrs(file1, ent); 1479 } 1480 1481 /* Create the new log file and move it into place */ 1482 if (noaction) 1483 printf("Start new log...\n"); 1484 createlog(ent); 1485 1486 /* 1487 * Save all signalling and file-compression to be done after log 1488 * files from all entries have been rotated. This way any one 1489 * process will not be sent the same signal multiple times when 1490 * multiple log files had to be rotated. 1491 */ 1492 swork = NULL; 1493 if (ent->pid_file != NULL) 1494 swork = save_sigwork(ent); 1495 if (ent->numlogs > 0 && (flags & (CE_COMPACT | CE_BZCOMPACT))) { 1496 /* 1497 * The zipwork_entry will include a pointer to this 1498 * conf_entry, so the conf_entry should not be freed. 1499 */ 1500 free_or_keep = KEEP_ENT; 1501 save_zipwork(ent, swork, ent->fsize, file1); 1502 } 1503 1504 return (free_or_keep); 1505 } 1506 1507 static void 1508 do_sigwork(struct sigwork_entry *swork) 1509 { 1510 struct sigwork_entry *nextsig; 1511 int kres, secs; 1512 1513 if (!(swork->sw_pidok) || swork->sw_pid == 0) 1514 return; /* no work to do... */ 1515 1516 /* 1517 * If nosignal (-s) was specified, then do not signal any process. 1518 * Note that a nosignal request triggers a warning message if the 1519 * rotated logfile needs to be compressed, *unless* -R was also 1520 * specified. We assume that an `-sR' request came from a process 1521 * which writes to the logfile, and as such, we assume that process 1522 * has already made sure the logfile is not presently in use. This 1523 * just sets swork->sw_pidok to a special value, and do_zipwork 1524 * will print any necessary warning(s). 1525 */ 1526 if (nosignal) { 1527 if (!rotatereq) 1528 swork->sw_pidok = -1; 1529 return; 1530 } 1531 1532 /* 1533 * Compute the pause between consecutive signals. Use a longer 1534 * sleep time if we will be sending two signals to the same 1535 * deamon or process-group. 1536 */ 1537 secs = 0; 1538 nextsig = SLIST_NEXT(swork, sw_nextp); 1539 if (nextsig != NULL) { 1540 if (swork->sw_pid == nextsig->sw_pid) 1541 secs = 10; 1542 else 1543 secs = 1; 1544 } 1545 1546 if (noaction) { 1547 printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum, 1548 (int)swork->sw_pid, swork->sw_fname); 1549 if (secs > 0) 1550 printf("\tsleep %d\n", secs); 1551 return; 1552 } 1553 1554 kres = kill(swork->sw_pid, swork->sw_signum); 1555 if (kres != 0) { 1556 /* 1557 * Assume that "no such process" (ESRCH) is something 1558 * to warn about, but is not an error. Presumably the 1559 * process which writes to the rotated log file(s) is 1560 * gone, in which case we should have no problem with 1561 * compressing the rotated log file(s). 1562 */ 1563 if (errno != ESRCH) 1564 swork->sw_pidok = 0; 1565 warn("can't notify %s, pid %d", swork->sw_pidtype, 1566 (int)swork->sw_pid); 1567 } else { 1568 if (verbose) 1569 printf("Notified %s pid %d = %s\n", swork->sw_pidtype, 1570 (int)swork->sw_pid, swork->sw_fname); 1571 if (secs > 0) { 1572 if (verbose) 1573 printf("Pause %d second(s) between signals\n", 1574 secs); 1575 sleep(secs); 1576 } 1577 } 1578 } 1579 1580 static void 1581 do_zipwork(struct zipwork_entry *zwork) 1582 { 1583 const char *pgm_name, *pgm_path; 1584 int errsav, fcount, zstatus; 1585 pid_t pidzip, wpid; 1586 char zresult[MAXPATHLEN]; 1587 1588 pgm_path = NULL; 1589 strlcpy(zresult, zwork->zw_fname, sizeof(zresult)); 1590 if (zwork != NULL && zwork->zw_conf != NULL) { 1591 if (zwork->zw_conf->flags & CE_COMPACT) { 1592 pgm_path = _PATH_GZIP; 1593 strlcat(zresult, COMPRESS_POSTFIX, sizeof(zresult)); 1594 } else if (zwork->zw_conf->flags & CE_BZCOMPACT) { 1595 pgm_path = _PATH_BZIP2; 1596 strlcat(zresult, BZCOMPRESS_POSTFIX, sizeof(zresult)); 1597 } 1598 } 1599 if (pgm_path == NULL) { 1600 warnx("invalid entry for %s in do_zipwork", zwork->zw_fname); 1601 return; 1602 } 1603 pgm_name = strrchr(pgm_path, '/'); 1604 if (pgm_name == NULL) 1605 pgm_name = pgm_path; 1606 else 1607 pgm_name++; 1608 1609 if (zwork->zw_swork != NULL && zwork->zw_swork->sw_pidok <= 0) { 1610 warnx( 1611 "log %s not compressed because daemon(s) not notified", 1612 zwork->zw_fname); 1613 change_attrs(zwork->zw_fname, zwork->zw_conf); 1614 return; 1615 } 1616 1617 if (noaction) { 1618 printf("\t%s %s\n", pgm_name, zwork->zw_fname); 1619 change_attrs(zresult, zwork->zw_conf); 1620 return; 1621 } 1622 1623 fcount = 1; 1624 pidzip = fork(); 1625 while (pidzip < 0) { 1626 /* 1627 * The fork failed. If the failure was due to a temporary 1628 * problem, then wait a short time and try it again. 1629 */ 1630 errsav = errno; 1631 warn("fork() for `%s %s'", pgm_name, zwork->zw_fname); 1632 if (errsav != EAGAIN || fcount > 5) 1633 errx(1, "Exiting..."); 1634 sleep(fcount * 12); 1635 fcount++; 1636 pidzip = fork(); 1637 } 1638 if (!pidzip) { 1639 /* The child process executes the compression command */ 1640 execl(pgm_path, pgm_path, "-f", zwork->zw_fname, (char *)0); 1641 err(1, "execl(`%s -f %s')", pgm_path, zwork->zw_fname); 1642 } 1643 1644 wpid = waitpid(pidzip, &zstatus, 0); 1645 if (wpid == -1) { 1646 /* XXX - should this be a fatal error? */ 1647 warn("%s: waitpid(%d)", pgm_path, pidzip); 1648 return; 1649 } 1650 if (!WIFEXITED(zstatus)) { 1651 warnx("`%s -f %s' did not terminate normally", pgm_name, 1652 zwork->zw_fname); 1653 return; 1654 } 1655 if (WEXITSTATUS(zstatus)) { 1656 warnx("`%s -f %s' terminated with a non-zero status (%d)", 1657 pgm_name, zwork->zw_fname, WEXITSTATUS(zstatus)); 1658 return; 1659 } 1660 1661 /* Compression was successful, set file attributes on the result. */ 1662 change_attrs(zresult, zwork->zw_conf); 1663 } 1664 1665 /* 1666 * Save information on any process we need to signal. Any single 1667 * process may need to be sent different signal-values for different 1668 * log files, but usually a single signal-value will cause the process 1669 * to close and re-open all of it's log files. 1670 */ 1671 static struct sigwork_entry * 1672 save_sigwork(const struct conf_entry *ent) 1673 { 1674 struct sigwork_entry *sprev, *stmp; 1675 int ndiff; 1676 size_t tmpsiz; 1677 1678 sprev = NULL; 1679 ndiff = 1; 1680 SLIST_FOREACH(stmp, &swhead, sw_nextp) { 1681 ndiff = strcmp(ent->pid_file, stmp->sw_fname); 1682 if (ndiff > 0) 1683 break; 1684 if (ndiff == 0) { 1685 if (ent->sig == stmp->sw_signum) 1686 break; 1687 if (ent->sig > stmp->sw_signum) { 1688 ndiff = 1; 1689 break; 1690 } 1691 } 1692 sprev = stmp; 1693 } 1694 if (stmp != NULL && ndiff == 0) 1695 return (stmp); 1696 1697 tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_file) + 1; 1698 stmp = malloc(tmpsiz); 1699 set_swpid(stmp, ent); 1700 stmp->sw_signum = ent->sig; 1701 strcpy(stmp->sw_fname, ent->pid_file); 1702 if (sprev == NULL) 1703 SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp); 1704 else 1705 SLIST_INSERT_AFTER(sprev, stmp, sw_nextp); 1706 return (stmp); 1707 } 1708 1709 /* 1710 * Save information on any file we need to compress. We may see the same 1711 * file multiple times, so check the full list to avoid duplicates. The 1712 * list itself is sorted smallest-to-largest, because that's the order we 1713 * want to compress the files. If the partition is very low on disk space, 1714 * then the smallest files are the most likely to compress, and compressing 1715 * them first will free up more space for the larger files. 1716 */ 1717 static struct zipwork_entry * 1718 save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork, 1719 int zsize, const char *zipfname) 1720 { 1721 struct zipwork_entry *zprev, *ztmp; 1722 int ndiff; 1723 size_t tmpsiz; 1724 1725 /* Compute the size if the caller did not know it. */ 1726 if (zsize < 0) 1727 zsize = sizefile(zipfname); 1728 1729 zprev = NULL; 1730 ndiff = 1; 1731 SLIST_FOREACH(ztmp, &zwhead, zw_nextp) { 1732 ndiff = strcmp(zipfname, ztmp->zw_fname); 1733 if (ndiff == 0) 1734 break; 1735 if (zsize > ztmp->zw_fsize) 1736 zprev = ztmp; 1737 } 1738 if (ztmp != NULL && ndiff == 0) 1739 return (ztmp); 1740 1741 tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1; 1742 ztmp = malloc(tmpsiz); 1743 ztmp->zw_conf = ent; 1744 ztmp->zw_swork = swork; 1745 ztmp->zw_fsize = zsize; 1746 strcpy(ztmp->zw_fname, zipfname); 1747 if (zprev == NULL) 1748 SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp); 1749 else 1750 SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp); 1751 return (ztmp); 1752 } 1753 1754 /* Send a signal to the pid specified by pidfile */ 1755 static void 1756 set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent) 1757 { 1758 FILE *f; 1759 long minok, maxok, rval; 1760 char *endp, *linep, line[BUFSIZ]; 1761 1762 minok = MIN_PID; 1763 maxok = MAX_PID; 1764 swork->sw_pidok = 0; 1765 swork->sw_pid = 0; 1766 swork->sw_pidtype = "daemon"; 1767 if (ent->flags & CE_SIGNALGROUP) { 1768 /* 1769 * If we are expected to signal a process-group when 1770 * rotating this logfile, then the value read in should 1771 * be the negative of a valid process ID. 1772 */ 1773 minok = -MAX_PID; 1774 maxok = -MIN_PID; 1775 swork->sw_pidtype = "process-group"; 1776 } 1777 1778 f = fopen(ent->pid_file, "r"); 1779 if (f == NULL) { 1780 warn("can't open pid file: %s", ent->pid_file); 1781 return; 1782 } 1783 1784 if (fgets(line, BUFSIZ, f) == NULL) { 1785 /* 1786 * Warn if the PID file is empty, but do not consider 1787 * it an error. Most likely it means the process has 1788 * has terminated, so it should be safe to rotate any 1789 * log files that the process would have been using. 1790 */ 1791 if (feof(f)) { 1792 swork->sw_pidok = 1; 1793 warnx("pid file is empty: %s", ent->pid_file); 1794 } else 1795 warn("can't read from pid file: %s", ent->pid_file); 1796 fclose(f); 1797 return; 1798 } 1799 fclose(f); 1800 1801 errno = 0; 1802 linep = line; 1803 while (*linep == ' ') 1804 linep++; 1805 rval = strtol(linep, &endp, 10); 1806 if (*endp != '\0' && !isspacech(*endp)) { 1807 warnx("pid file does not start with a valid number: %s", 1808 ent->pid_file); 1809 } else if (rval < minok || rval > maxok) { 1810 warnx("bad value '%ld' for process number in %s", 1811 rval, ent->pid_file); 1812 if (verbose) 1813 warnx("\t(expecting value between %ld and %ld)", 1814 minok, maxok); 1815 } else { 1816 swork->sw_pidok = 1; 1817 swork->sw_pid = rval; 1818 } 1819 1820 return; 1821 } 1822 1823 /* Log the fact that the logs were turned over */ 1824 static int 1825 log_trim(const char *logname, const struct conf_entry *log_ent) 1826 { 1827 FILE *f; 1828 const char *xtra; 1829 1830 if ((f = fopen(logname, "a")) == NULL) 1831 return (-1); 1832 xtra = ""; 1833 if (log_ent->def_cfg) 1834 xtra = " using <default> rule"; 1835 if (log_ent->firstcreate) 1836 fprintf(f, "%s %s newsyslog[%d]: logfile first created%s\n", 1837 daytime, hostname, (int) getpid(), xtra); 1838 else if (log_ent->r_reason != NULL) 1839 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s%s\n", 1840 daytime, hostname, (int) getpid(), log_ent->r_reason, xtra); 1841 else 1842 fprintf(f, "%s %s newsyslog[%d]: logfile turned over%s\n", 1843 daytime, hostname, (int) getpid(), xtra); 1844 if (fclose(f) == EOF) 1845 err(1, "log_trim: fclose"); 1846 return (0); 1847 } 1848 1849 /* Return size in kilobytes of a file */ 1850 static int 1851 sizefile(const char *file) 1852 { 1853 struct stat sb; 1854 1855 if (stat(file, &sb) < 0) 1856 return (-1); 1857 return (kbytes(dbtob(sb.st_blocks))); 1858 } 1859 1860 /* Return the age of old log file (file.0) */ 1861 static int 1862 age_old_log(char *file) 1863 { 1864 struct stat sb; 1865 char *endp; 1866 char tmp[MAXPATHLEN + sizeof(".0") + sizeof(COMPRESS_POSTFIX) + 1867 sizeof(BZCOMPRESS_POSTFIX) + 1]; 1868 1869 if (archtodir) { 1870 char *p; 1871 1872 /* build name of archive directory into tmp */ 1873 if (*archdirname == '/') { /* absolute */ 1874 strlcpy(tmp, archdirname, sizeof(tmp)); 1875 } else { /* relative */ 1876 /* get directory part of logfile */ 1877 strlcpy(tmp, file, sizeof(tmp)); 1878 if ((p = strrchr(tmp, '/')) == NULL) 1879 tmp[0] = '\0'; 1880 else 1881 *(p + 1) = '\0'; 1882 strlcat(tmp, archdirname, sizeof(tmp)); 1883 } 1884 1885 strlcat(tmp, "/", sizeof(tmp)); 1886 1887 /* get filename part of logfile */ 1888 if ((p = strrchr(file, '/')) == NULL) 1889 strlcat(tmp, file, sizeof(tmp)); 1890 else 1891 strlcat(tmp, p + 1, sizeof(tmp)); 1892 } else { 1893 strlcpy(tmp, file, sizeof(tmp)); 1894 } 1895 1896 strlcat(tmp, ".0", sizeof(tmp)); 1897 if (stat(tmp, &sb) < 0) { 1898 /* 1899 * A plain '.0' file does not exist. Try again, first 1900 * with the added suffix of '.gz', then with an added 1901 * suffix of '.bz2' instead of '.gz'. 1902 */ 1903 endp = strchr(tmp, '\0'); 1904 strlcat(tmp, COMPRESS_POSTFIX, sizeof(tmp)); 1905 if (stat(tmp, &sb) < 0) { 1906 *endp = '\0'; /* Remove .gz */ 1907 strlcat(tmp, BZCOMPRESS_POSTFIX, sizeof(tmp)); 1908 if (stat(tmp, &sb) < 0) 1909 return (-1); 1910 } 1911 } 1912 return ((int)(ptimeget_secs(timenow) - sb.st_mtime + 1800) / 3600); 1913 } 1914 1915 /* Skip Over Blanks */ 1916 static char * 1917 sob(char *p) 1918 { 1919 while (p && *p && isspace(*p)) 1920 p++; 1921 return (p); 1922 } 1923 1924 /* Skip Over Non-Blanks */ 1925 static char * 1926 son(char *p) 1927 { 1928 while (p && *p && !isspace(*p)) 1929 p++; 1930 return (p); 1931 } 1932 1933 /* Check if string is actually a number */ 1934 static int 1935 isnumberstr(const char *string) 1936 { 1937 while (*string) { 1938 if (!isdigitch(*string++)) 1939 return (0); 1940 } 1941 return (1); 1942 } 1943 1944 /* 1945 * Save the active log file under a new name. A link to the new name 1946 * is the quick-and-easy way to do this. If that fails (which it will 1947 * if the destination is on another partition), then make a copy of 1948 * the file to the new location. 1949 */ 1950 static void 1951 savelog(char *from, char *to) 1952 { 1953 FILE *src, *dst; 1954 int c, res; 1955 1956 res = link(from, to); 1957 if (res == 0) 1958 return; 1959 1960 if ((src = fopen(from, "r")) == NULL) 1961 err(1, "can't fopen %s for reading", from); 1962 if ((dst = fopen(to, "w")) == NULL) 1963 err(1, "can't fopen %s for writing", to); 1964 1965 while ((c = getc(src)) != EOF) { 1966 if ((putc(c, dst)) == EOF) 1967 err(1, "error writing to %s", to); 1968 } 1969 1970 if (ferror(src)) 1971 err(1, "error reading from %s", from); 1972 if ((fclose(src)) != 0) 1973 err(1, "can't fclose %s", to); 1974 if ((fclose(dst)) != 0) 1975 err(1, "can't fclose %s", from); 1976 } 1977 1978 /* create one or more directory components of a path */ 1979 static void 1980 createdir(const struct conf_entry *ent, char *dirpart) 1981 { 1982 int res; 1983 char *s, *d; 1984 char mkdirpath[MAXPATHLEN]; 1985 struct stat st; 1986 1987 s = dirpart; 1988 d = mkdirpath; 1989 1990 for (;;) { 1991 *d++ = *s++; 1992 if (*s != '/' && *s != '\0') 1993 continue; 1994 *d = '\0'; 1995 res = lstat(mkdirpath, &st); 1996 if (res != 0) { 1997 if (noaction) { 1998 printf("\tmkdir %s\n", mkdirpath); 1999 } else { 2000 res = mkdir(mkdirpath, 0755); 2001 if (res != 0) 2002 err(1, "Error on mkdir(\"%s\") for -a", 2003 mkdirpath); 2004 } 2005 } 2006 if (*s == '\0') 2007 break; 2008 } 2009 if (verbose) { 2010 if (ent->firstcreate) 2011 printf("Created directory '%s' for new %s\n", 2012 dirpart, ent->log); 2013 else 2014 printf("Created directory '%s' for -a\n", dirpart); 2015 } 2016 } 2017 2018 /* 2019 * Create a new log file, destroying any currently-existing version 2020 * of the log file in the process. If the caller wants a backup copy 2021 * of the file to exist, they should call 'link(logfile,logbackup)' 2022 * before calling this routine. 2023 */ 2024 void 2025 createlog(const struct conf_entry *ent) 2026 { 2027 int fd, failed; 2028 struct stat st; 2029 char *realfile, *slash, tempfile[MAXPATHLEN]; 2030 2031 fd = -1; 2032 realfile = ent->log; 2033 2034 /* 2035 * If this log file is being created for the first time (-C option), 2036 * then it may also be true that the parent directory does not exist 2037 * yet. Check, and create that directory if it is missing. 2038 */ 2039 if (ent->firstcreate) { 2040 strlcpy(tempfile, realfile, sizeof(tempfile)); 2041 slash = strrchr(tempfile, '/'); 2042 if (slash != NULL) { 2043 *slash = '\0'; 2044 failed = stat(tempfile, &st); 2045 if (failed && errno != ENOENT) 2046 err(1, "Error on stat(%s)", tempfile); 2047 if (failed) 2048 createdir(ent, tempfile); 2049 else if (!S_ISDIR(st.st_mode)) 2050 errx(1, "%s exists but is not a directory", 2051 tempfile); 2052 } 2053 } 2054 2055 /* 2056 * First create an unused filename, so it can be chown'ed and 2057 * chmod'ed before it is moved into the real location. mkstemp 2058 * will create the file mode=600 & owned by us. Note that all 2059 * temp files will have a suffix of '.z<something>'. 2060 */ 2061 strlcpy(tempfile, realfile, sizeof(tempfile)); 2062 strlcat(tempfile, ".zXXXXXX", sizeof(tempfile)); 2063 if (noaction) 2064 printf("\tmktemp %s\n", tempfile); 2065 else { 2066 fd = mkstemp(tempfile); 2067 if (fd < 0) 2068 err(1, "can't mkstemp logfile %s", tempfile); 2069 2070 /* 2071 * Add status message to what will become the new log file. 2072 */ 2073 if (!(ent->flags & CE_BINARY)) { 2074 if (log_trim(tempfile, ent)) 2075 err(1, "can't add status message to log"); 2076 } 2077 } 2078 2079 /* Change the owner/group, if we are supposed to */ 2080 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2081 if (noaction) 2082 printf("\tchown %u:%u %s\n", ent->uid, ent->gid, 2083 tempfile); 2084 else { 2085 failed = fchown(fd, ent->uid, ent->gid); 2086 if (failed) 2087 err(1, "can't fchown temp file %s", tempfile); 2088 } 2089 } 2090 2091 /* Turn on NODUMP if it was requested in the config-file. */ 2092 if (ent->flags & CE_NODUMP) { 2093 if (noaction) 2094 printf("\tchflags nodump %s\n", tempfile); 2095 else { 2096 failed = fchflags(fd, UF_NODUMP); 2097 if (failed) { 2098 warn("log_trim: fchflags(NODUMP)"); 2099 } 2100 } 2101 } 2102 2103 /* 2104 * Note that if the real logfile still exists, and if the call 2105 * to rename() fails, then "neither the old file nor the new 2106 * file shall be changed or created" (to quote the standard). 2107 * If the call succeeds, then the file will be replaced without 2108 * any window where some other process might find that the file 2109 * did not exist. 2110 * XXX - ? It may be that for some error conditions, we could 2111 * retry by first removing the realfile and then renaming. 2112 */ 2113 if (noaction) { 2114 printf("\tchmod %o %s\n", ent->permissions, tempfile); 2115 printf("\tmv %s %s\n", tempfile, realfile); 2116 } else { 2117 failed = fchmod(fd, ent->permissions); 2118 if (failed) 2119 err(1, "can't fchmod temp file '%s'", tempfile); 2120 failed = rename(tempfile, realfile); 2121 if (failed) 2122 err(1, "can't mv %s to %s", tempfile, realfile); 2123 } 2124 2125 if (fd >= 0) 2126 close(fd); 2127 } 2128 2129 /* 2130 * Change the attributes of a given filename to what was specified in 2131 * the newsyslog.conf entry. This routine is only called for files 2132 * that newsyslog expects that it has created, and thus it is a fatal 2133 * error if this routine finds that the file does not exist. 2134 */ 2135 static void 2136 change_attrs(const char *fname, const struct conf_entry *ent) 2137 { 2138 int failed; 2139 2140 if (noaction) { 2141 printf("\tchmod %o %s\n", ent->permissions, fname); 2142 2143 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) 2144 printf("\tchown %u:%u %s\n", 2145 ent->uid, ent->gid, fname); 2146 2147 if (ent->flags & CE_NODUMP) 2148 printf("\tchflags nodump %s\n", fname); 2149 return; 2150 } 2151 2152 failed = chmod(fname, ent->permissions); 2153 if (failed) { 2154 if (errno != EPERM) 2155 err(1, "chmod(%s) in change_attrs", fname); 2156 warn("change_attrs couldn't chmod(%s)", fname); 2157 } 2158 2159 if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) { 2160 failed = chown(fname, ent->uid, ent->gid); 2161 if (failed) 2162 warn("can't chown %s", fname); 2163 } 2164 2165 if (ent->flags & CE_NODUMP) { 2166 failed = chflags(fname, UF_NODUMP); 2167 if (failed) 2168 warn("can't chflags %s NODUMP", fname); 2169 } 2170 } 2171