Annotation of src/usr.bin/newsyslog/newsyslog.c, Revision 1.55
1.55 ! millert 1: /* $OpenBSD: newsyslog.c,v 1.54 2002/09/19 15:27:31 millert Exp $ */
1.10 downsj 2:
3: /*
1.48 millert 4: * Copyright (c) 1999, 2002 Todd C. Miller <Todd.Miller@courtesan.com>
1.30 millert 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: * 3. The name of the author may not be used to endorse or promote products
16: * derived from this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
19: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
20: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: */
29:
30: /*
1.10 downsj 31: * Copyright (c) 1997, Jason Downs. All rights reserved.
32: *
33: * Redistribution and use in source and binary forms, with or without
34: * modification, are permitted provided that the following conditions
35: * are met:
36: * 1. Redistributions of source code must retain the above copyright
37: * notice, this list of conditions and the following disclaimer.
38: * 2. Redistributions in binary form must reproduce the above copyright
39: * notice, this list of conditions and the following disclaimer in the
40: * documentation and/or other materials provided with the distribution.
41: * 3. All advertising materials mentioning features or use of this software
42: * must display the following acknowledgement:
43: * This product includes software developed by Jason Downs for the
44: * OpenBSD system.
45: * 4. Neither the name(s) of the author(s) nor the name OpenBSD
46: * may be used to endorse or promote products derived from this software
47: * without specific prior written permission.
48: *
49: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
50: * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
51: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
52: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
53: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
54: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
55: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
56: * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59: * SUCH DAMAGE.
60: */
1.3 deraadt 61:
1.1 deraadt 62: /*
63: * This file contains changes from the Open Software Foundation.
64: */
65:
66: /*
1.50 millert 67: * Copyright 1988, 1989 by the Massachusetts Institute of Technology
68: *
69: * Permission to use, copy, modify, and distribute this software
70: * and its documentation for any purpose and without fee is
71: * hereby granted, provided that the above copyright notice
72: * appear in all copies and that both that copyright notice and
73: * this permission notice appear in supporting documentation,
74: * and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
75: * used in advertising or publicity pertaining to distribution
76: * of the software without specific, written prior permission.
77: * M.I.T. and the M.I.T. S.I.P.B. make no representations about
78: * the suitability of this software for any purpose. It is
79: * provided "as is" without express or implied warranty.
80: */
1.1 deraadt 81:
82: /*
83: * newsyslog - roll over selected logs at the appropriate time,
84: * keeping the a specified number of backup files around.
85: *
86: */
87:
88: #ifndef lint
1.55 ! millert 89: static const char rcsid[] = "$OpenBSD: newsyslog.c,v 1.54 2002/09/19 15:27:31 millert Exp $";
1.1 deraadt 90: #endif /* not lint */
91:
92: #ifndef CONF
1.47 millert 93: #define CONF "/etc/newsyslog.conf" /* Configuration file */
1.1 deraadt 94: #endif
95: #ifndef PIDFILE
96: #define PIDFILE "/etc/syslog.pid"
97: #endif
98: #ifndef COMPRESS
1.47 millert 99: #define COMPRESS "/usr/bin/compress" /* File compression program */
1.1 deraadt 100: #endif
101: #ifndef COMPRESS_POSTFIX
102: #define COMPRESS_POSTFIX ".Z"
103: #endif
1.10 downsj 104: #ifndef STATS_DIR
105: #define STATS_DIR "/etc"
106: #endif
107: #ifndef SENDMAIL
108: #define SENDMAIL "/usr/lib/sendmail"
109: #endif
1.1 deraadt 110:
1.48 millert 111: #include <sys/param.h>
112: #include <sys/stat.h>
1.9 downsj 113: #include <sys/time.h>
114: #include <sys/wait.h>
1.48 millert 115:
1.1 deraadt 116: #include <ctype.h>
1.48 millert 117: #include <err.h>
118: #include <errno.h>
1.9 downsj 119: #include <fcntl.h>
1.1 deraadt 120: #include <grp.h>
1.47 millert 121: #include <limits.h>
1.48 millert 122: #include <pwd.h>
123: #include <signal.h>
124: #include <stdio.h>
125: #include <stdlib.h>
126: #include <string.h>
1.9 downsj 127: #include <unistd.h>
1.1 deraadt 128:
1.26 millert 129: #define CE_ROTATED 0x01 /* Log file has been rotated */
130: #define CE_COMPACT 0x02 /* Compact the achived log files */
131: #define CE_BINARY 0x04 /* Logfile is in binary, don't add */
1.10 downsj 132: /* status messages */
1.26 millert 133: #define CE_MONITOR 0x08 /* Monitory for changes */
1.45 wcobb 134: #define CE_FOLLOW 0x10 /* Follow symbolic links */
1.35 deraadt 135:
1.49 millert 136: #define MIN_PID 4 /* Don't touch pids lower than this */
137: #define MIN_SIZE 512 /* Don't rotate if smaller than this */
138:
1.50 millert 139: #define DPRINTF(x) do { if (verbose) printf x ; } while (0)
140:
1.1 deraadt 141: struct conf_entry {
1.35 deraadt 142: char *log; /* Name of the log */
1.51 millert 143: char *logbase; /* Basename of the log */
144: char *backdir; /* Directory in which to store backups */
1.35 deraadt 145: uid_t uid; /* Owner of log */
146: gid_t gid; /* Group of log */
147: int numlogs; /* Number of logs to keep */
148: int size; /* Size cutoff to trigger trimming the log */
149: int hours; /* Hours between log trimming */
150: int permissions; /* File permissions on the log */
1.30 millert 151: int signal; /* Signal to send (defaults to SIGHUP) */
1.35 deraadt 152: int flags; /* Flags (CE_COMPACT & CE_BINARY) */
1.10 downsj 153: char *whom; /* Whom to notify if logfile changes */
1.30 millert 154: char *pidfile; /* Path to file containg pid to signal */
155: char *runcmd; /* Command to run instead of sending a signal */
1.35 deraadt 156: struct conf_entry *next; /* Linked list pointer */
1.1 deraadt 157: };
158:
1.30 millert 159: struct pidinfo {
160: char *file;
161: int signal;
162: };
163:
1.52 millert 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 */
1.33 millert 167: int monitormode = 0; /* Don't do monitoring by default */
1.52 millert 168: int force = 0; /* Force the logs to be rotated */
169: char *conf = CONF; /* Configuration file to use */
170: time_t timenow;
171: char hostname[MAXHOSTNAMELEN]; /* hostname */
172: char *daytime; /* timenow in human readable form */
173: char *arcdir; /* dir to put archives in (if it exists) */
1.1 deraadt 174:
1.43 millert 175: void do_entry(struct conf_entry *);
1.48 millert 176: void parse_args(int, char **);
1.43 millert 177: void usage(void);
178: struct conf_entry *parse_file(int *);
179: char *missing_field(char *, char *);
1.51 millert 180: void dotrim(struct conf_entry *);
1.43 millert 181: int log_trim(char *);
1.51 millert 182: void compress_log(struct conf_entry *);
1.43 millert 183: int sizefile(char *);
1.51 millert 184: int age_old_log(struct conf_entry *);
1.43 millert 185: char *sob(char *);
186: char *son(char *);
187: int isnumberstr(char *);
188: void domonitor(char *, char *);
189: FILE *openmail(void);
190: void child_killer(int);
191: void run_command(char *);
192: void send_signal(char *, int);
1.1 deraadt 193:
1.25 millert 194: int
1.48 millert 195: main(int argc, char **argv)
1.1 deraadt 196: {
1.53 millert 197: struct conf_entry *p, *q, *x, *y;
1.30 millert 198: struct pidinfo *pidlist, *pl;
1.53 millert 199: char **av;
1.28 millert 200: int status, listlen;
1.35 deraadt 201:
1.48 millert 202: parse_args(argc, argv);
1.53 millert 203: argc -= optind;
204: argv += optind;
205:
1.35 deraadt 206: if (needroot && getuid() && geteuid())
1.11 downsj 207: errx(1, "You must be root.");
1.53 millert 208:
209: p = parse_file(&listlen);
210: if (argc > 0) {
211: /* Only rotate specified files. */
212: x = y = NULL;
213: listlen = 0;
214: for (av = argv; *av; av++) {
215: for (q = p; q; q = q->next)
216: if (strcmp(*av, q->log) == 0) {
217: if (x == NULL)
218: x = y = q;
219: else {
220: y->next = q;
221: y = q;
222: }
223: listlen++;
224: break;
225: }
226: if (q == NULL)
227: warnx("%s is not listed in %s", *av, conf);
228: }
229: if (x == NULL)
230: errx(1, "no specified log files found in %s", conf);
231: y->next = NULL;
232: p = x;
233: }
1.26 millert 234:
1.46 aaron 235: pidlist = (struct pidinfo *)calloc(listlen + 1, sizeof(struct pidinfo));
1.30 millert 236: if (pidlist == NULL)
1.28 millert 237: err(1, "calloc");
238:
1.53 millert 239: signal(SIGCHLD, child_killer);
240:
1.26 millert 241: /* Step 1, rotate all log files */
1.53 millert 242: for (q = p; q; q = q->next)
1.35 deraadt 243: do_entry(q);
1.26 millert 244:
1.28 millert 245: /* Step 2, make a list of unique pid files */
1.30 millert 246: for (q = p, pl = pidlist; q; ) {
1.28 millert 247: if (q->flags & CE_ROTATED) {
1.30 millert 248: struct pidinfo *pltmp;
1.28 millert 249:
1.30 millert 250: for (pltmp = pidlist; pltmp < pl; pltmp++) {
1.55 ! millert 251: if ((q->pidfile &&
! 252: strcmp(pltmp->file, q->pidfile) == 0 &&
! 253: pltmp->signal == q->signal) ||
! 254: (q->runcmd &&
1.30 millert 255: strcmp(q->runcmd, pltmp->file) == 0))
1.28 millert 256: break;
1.30 millert 257: }
258: if (pltmp == pl) { /* unique entry */
259: if (q->runcmd) {
260: pl->file = q->runcmd;
261: pl->signal = -1;
262: } else {
263: pl->file = q->pidfile;
264: pl->signal = q->signal;
265: }
1.31 millert 266: pl++;
1.30 millert 267: }
1.28 millert 268: }
1.35 deraadt 269: q = q->next;
270: }
1.26 millert 271:
1.30 millert 272: /* Step 3, send a signal or run a command */
273: for (pl = pidlist; pl->file; pl++) {
274: if (pl->signal == -1)
275: run_command(pl->file);
276: else
277: send_signal(pl->file, pl->signal);
278: }
1.28 millert 279: if (!noaction)
280: sleep(5);
281:
282: /* Step 4, compress the log.0 file if configured to do so and free */
1.35 deraadt 283: while (p) {
1.26 millert 284: if ((p->flags & CE_COMPACT) && (p->flags & CE_ROTATED))
1.51 millert 285: compress_log(p);
1.26 millert 286: q = p;
1.35 deraadt 287: p = p->next;
288: free(q);
289: }
1.16 millert 290:
291: /* Wait for children to finish, then exit */
292: while (waitpid(-1, &status, 0) != -1)
293: ;
1.35 deraadt 294: exit(0);
1.1 deraadt 295: }
296:
1.25 millert 297: void
1.48 millert 298: do_entry(struct conf_entry *ent)
1.1 deraadt 299: {
1.48 millert 300: int modtime, size;
301: struct stat sb;
1.45 wcobb 302:
1.51 millert 303: if (lstat(ent->log, &sb) != 0)
1.50 millert 304: return;
305: if (!S_ISREG(sb.st_mode) &&
306: (!S_ISLNK(sb.st_mode) || !(ent->flags & CE_FOLLOW))) {
307: DPRINTF(("--> not a regular file, skipping\n"));
308: return;
1.45 wcobb 309: }
1.14 millert 310:
1.50 millert 311: DPRINTF(("%s <%d%s%s%s>: ", ent->log, ent->numlogs,
1.51 millert 312: (ent->flags & CE_COMPACT) ? "Z" : "",
313: (ent->flags & CE_BINARY) ? "B" : "",
314: (ent->flags & CE_FOLLOW) ? "F" : ""));
1.50 millert 315:
1.35 deraadt 316: size = sizefile(ent->log);
1.51 millert 317: modtime = age_old_log(ent);
1.35 deraadt 318: if (size < 0) {
1.50 millert 319: DPRINTF(("does not exist.\n"));
1.35 deraadt 320: } else {
1.50 millert 321: if (ent->size > 0)
322: DPRINTF(("size (Kb): %d [%d] ", size, ent->size));
323: if (ent->hours > 0)
324: DPRINTF(("age (hr): %d [%d] ", modtime, ent->hours));
1.33 millert 325: if (monitormode && ent->flags & CE_MONITOR)
1.10 downsj 326: domonitor(ent->log, ent->whom);
1.52 millert 327: if (!monitormode && (force ||
328: (ent->size > 0 && size >= ent->size) ||
1.49 millert 329: (ent->hours > 0 && (modtime >= ent->hours || modtime < 0)
330: && ((ent->flags & CE_BINARY) || size >= MIN_SIZE)))) {
1.50 millert 331: DPRINTF(("--> trimming log....\n"));
1.19 kstailey 332: if (noaction && !verbose)
1.50 millert 333: printf("%s <%d%s%s%s>\n", ent->log,
334: ent->numlogs,
335: (ent->flags & CE_COMPACT) ? "Z" : "",
336: (ent->flags & CE_BINARY) ? "B" : "",
337: (ent->flags & CE_FOLLOW) ? "F" : "");
1.51 millert 338: dotrim(ent);
1.26 millert 339: ent->flags |= CE_ROTATED;
1.50 millert 340: } else
341: DPRINTF(("--> skipping\n"));
1.35 deraadt 342: }
1.1 deraadt 343: }
344:
1.30 millert 345: /* Run the specified command */
346: void
1.48 millert 347: run_command(char *cmd)
1.30 millert 348: {
349: if (noaction)
1.55 ! millert 350: (void)printf("run %s\n", cmd);
1.30 millert 351: else
352: system(cmd);
353: }
354:
355: /* Send a signal to the pid specified by pidfile */
1.26 millert 356: void
1.48 millert 357: send_signal(char *pidfile, int signal)
1.26 millert 358: {
1.48 millert 359: pid_t pid;
360: FILE *f;
361: char line[BUFSIZ], *ep, *err;
1.40 deraadt 362: unsigned long ulval;
1.26 millert 363:
1.35 deraadt 364: if ((f = fopen(pidfile, "r")) == NULL) {
1.26 millert 365: warn("can't open %s", pidfile);
366: return;
367: }
368:
1.48 millert 369: pid = 0;
1.42 millert 370: errno = 0;
371: err = NULL;
1.40 deraadt 372: if (fgets(line, sizeof(line), f)) {
373: ulval = strtoul(line, &ep, 10);
1.41 marc 374: if (line[0] == '\0' || (*ep != '\0' && *ep != '\n'))
1.40 deraadt 375: err = "invalid number in";
376: else if (errno == ERANGE && ulval == ULONG_MAX)
377: err = "out of range number in";
378: else if (ulval == 0)
379: err = "no number in";
380: else if (ulval < MIN_PID)
381: err = "preposterous process number in";
382: else
383: pid = ulval;
1.42 millert 384: } else {
385: if (errno == 0)
386: err = "empty";
387: else
388: err = "error reading";
1.40 deraadt 389: }
1.26 millert 390: (void)fclose(f);
391:
1.40 deraadt 392: if (err)
393: warnx("%s pid file: %s", err, pidfile);
394: else if (noaction)
1.44 mpech 395: (void)printf("kill -%s %ld\n", sys_signame[signal], (long)pid);
1.30 millert 396: else if (kill(pid, signal))
397: warnx("warning - could not send SIG%s to daemon",
398: sys_signame[signal]);
1.26 millert 399: }
400:
1.25 millert 401: void
1.48 millert 402: parse_args(int argc, char **argv)
1.1 deraadt 403: {
1.48 millert 404: int ch;
405: char *p;
1.1 deraadt 406:
1.35 deraadt 407: timenow = time(NULL);
408: daytime = ctime(&timenow) + 4;
409: daytime[15] = '\0';
1.1 deraadt 410:
1.35 deraadt 411: /* Let's get our hostname */
412: (void)gethostname(hostname, sizeof(hostname));
1.1 deraadt 413:
414: /* Truncate domain */
1.48 millert 415: if ((p = strchr(hostname, '.')) != NULL)
1.1 deraadt 416: *p = '\0';
417:
1.52 millert 418: while ((ch = getopt(argc, argv, "Fmnrva:f:")) != -1) {
1.48 millert 419: switch (ch) {
1.51 millert 420: case 'a':
421: arcdir = optarg;
422: break;
1.35 deraadt 423: case 'n':
424: noaction++; /* This implies needroot as off */
425: /* fall through */
426: case 'r':
427: needroot = 0;
428: break;
429: case 'v':
430: verbose++;
431: break;
432: case 'f':
433: conf = optarg;
434: break;
1.10 downsj 435: case 'm':
1.33 millert 436: monitormode++;
1.10 downsj 437: break;
1.52 millert 438: case 'F':
439: force++;
440: break;
1.35 deraadt 441: default:
442: usage();
443: }
444: }
1.52 millert 445: if (monitormode && force)
446: errx(1, "cannot specify both -m and -F flags");
1.9 downsj 447: }
1.1 deraadt 448:
1.25 millert 449: void
1.48 millert 450: usage(void)
1.1 deraadt 451: {
1.25 millert 452: extern const char *__progname;
453:
1.52 millert 454: (void)fprintf(stderr, "usage: %s [-Fmnrv] [-a directory] "
1.53 millert 455: "[-f config_file] [log ...]\n", __progname);
1.14 millert 456: exit(1);
1.1 deraadt 457: }
458:
1.52 millert 459: /*
460: * Parse a configuration file and return a linked list of all the logs
1.1 deraadt 461: * to process
462: */
1.25 millert 463: struct conf_entry *
1.48 millert 464: parse_file(int *nentries)
1.1 deraadt 465: {
1.48 millert 466: FILE *f;
467: char line[BUFSIZ], *parse, *q, *errline, *group, *tmp;
1.35 deraadt 468: struct conf_entry *first = NULL;
469: struct conf_entry *working = NULL;
1.48 millert 470: struct passwd *pwd;
1.35 deraadt 471: struct group *grp;
1.51 millert 472: struct stat sb;
1.1 deraadt 473:
1.35 deraadt 474: if (strcmp(conf, "-") == 0)
475: f = stdin;
1.48 millert 476: else if ((f = fopen(conf, "r")) == NULL)
477: err(1, "can't open %s", conf);
1.11 downsj 478:
1.28 millert 479: *nentries = 0;
1.35 deraadt 480: while (fgets(line, sizeof(line), f)) {
1.48 millert 481: tmp = sob(line);
1.54 millert 482: if (*tmp == '\0' || *tmp == '#')
1.35 deraadt 483: continue;
1.48 millert 484: errline = strdup(tmp);
1.11 downsj 485: if (errline == NULL)
486: err(1, "strdup");
1.28 millert 487: (*nentries)++;
1.35 deraadt 488: if (!first) {
489: working = (struct conf_entry *) malloc(sizeof(struct conf_entry));
1.11 downsj 490: if (working == NULL)
491: err(1, "malloc");
1.35 deraadt 492: first = working;
493: } else {
494: working->next = (struct conf_entry *) malloc(sizeof(struct conf_entry));
1.11 downsj 495: if (working->next == NULL)
496: err(1, "malloc");
1.35 deraadt 497: working = working->next;
498: }
1.1 deraadt 499:
1.35 deraadt 500: q = parse = missing_field(sob(line), errline);
501: *(parse = son(line)) = '\0';
502: working->log = strdup(q);
1.11 downsj 503: if (working->log == NULL)
504: err(1, "strdup");
1.1 deraadt 505:
1.51 millert 506: if ((working->logbase = strrchr(working->log, '/')) != NULL)
507: working->logbase++;
508:
1.35 deraadt 509: q = parse = missing_field(sob(++parse), errline);
510: *(parse = son(parse)) = '\0';
1.25 millert 511: if ((group = strchr(q, '.')) != NULL) {
512: *group++ = '\0';
513: if (*q) {
514: if (!(isnumberstr(q))) {
1.48 millert 515: if ((pwd = getpwnam(q)) == NULL)
1.25 millert 516: errx(1, "Error in config file; unknown user: %s", q);
1.48 millert 517: working->uid = pwd->pw_uid;
1.25 millert 518: } else
519: working->uid = atoi(q);
520: } else
1.50 millert 521: working->uid = (uid_t)-1;
1.25 millert 522:
523: q = group;
524: if (*q) {
525: if (!(isnumberstr(q))) {
526: if ((grp = getgrnam(q)) == NULL)
527: errx(1, "Error in config file; unknown group: %s", q);
528: working->gid = grp->gr_gid;
529: } else
530: working->gid = atoi(q);
531: } else
1.50 millert 532: working->gid = (gid_t)-1;
1.25 millert 533:
534: q = parse = missing_field(sob(++parse), errline);
535: *(parse = son(parse)) = '\0';
1.50 millert 536: } else {
537: working->uid = (uid_t)-1;
538: working->gid = (gid_t)-1;
539: }
1.1 deraadt 540:
1.35 deraadt 541: if (!sscanf(q, "%o", &working->permissions))
1.11 downsj 542: errx(1, "Error in config file; bad permissions: %s", q);
1.1 deraadt 543:
1.35 deraadt 544: q = parse = missing_field(sob(++parse), errline);
545: *(parse = son(parse)) = '\0';
546: if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1.11 downsj 547: errx(1, "Error in config file; bad number: %s", q);
1.1 deraadt 548:
1.35 deraadt 549: q = parse = missing_field(sob(++parse), errline);
550: *(parse = son(parse)) = '\0';
551: if (isdigit(*q))
552: working->size = atoi(q);
553: else
554: working->size = -1;
555:
556: q = parse = missing_field(sob(++parse), errline);
557: *(parse = son(parse)) = '\0';
558: if (isdigit(*q))
559: working->hours = atoi(q);
560: else
561: working->hours = -1;
1.1 deraadt 562:
1.35 deraadt 563: working->flags = 0;
564: q = sob(++parse); /* Optional field */
1.32 millert 565: if (*q == 'Z' || *q == 'z' || *q == 'B' || *q == 'b' ||
566: *q == 'M' || *q == 'm') {
567: *(parse = son(q)) = '\0';
568: while (*q) {
569: switch (*q) {
570: case 'Z':
571: case 'z':
572: working->flags |= CE_COMPACT;
573: break;
574: case 'B':
575: case 'b':
576: working->flags |= CE_BINARY;
577: break;
578: case 'M':
579: case 'm':
580: working->flags |= CE_MONITOR;
1.45 wcobb 581: break;
582: case 'F':
583: case 'f':
584: working->flags |= CE_FOLLOW;
1.32 millert 585: break;
586: default:
587: errx(1, "Illegal flag in config file: %c", *q);
588: break;
589: }
590: q++;
591: }
592: } else
1.40 deraadt 593: parse--; /* no flags so undo */
1.10 downsj 594:
595: working->whom = NULL;
596: if (working->flags & CE_MONITOR) { /* Optional field */
597: q = parse = sob(++parse);
598: *(parse = son(parse)) = '\0';
599:
600: working->whom = strdup(q);
1.11 downsj 601: if (working->log == NULL)
602: err(1, "strdup");
1.10 downsj 603: }
1.14 millert 604:
605: working->pidfile = PIDFILE;
1.30 millert 606: working->signal = SIGHUP;
607: working->runcmd = NULL;
608: for (;;) {
609: q = parse = sob(++parse); /* Optional field */
610: if (q == NULL || *q == '\0')
611: break;
612: if (*q == '/') {
613: *(parse = son(parse)) = '\0';
614: if (strlen(q) >= MAXPATHLEN)
615: errx(1, "%s: pathname too long", q);
616: working->pidfile = strdup(q);
617: if (working->pidfile == NULL)
618: err(1, "strdup");
619: } else if (*q == '"' && (tmp = strchr(q + 1, '"'))) {
620: *(parse = tmp) = '\0';
621: working->runcmd = strdup(++q);
622: if (working->runcmd == NULL)
623: err(1, "strdup");
1.55 ! millert 624: working->pidfile = NULL;
! 625: working->signal = -1;
1.30 millert 626: } else if (strncmp(q, "SIG", 3) == 0) {
627: int i;
628:
629: *(parse = son(parse)) = '\0';
630: for (i = 1; i < NSIG; i++) {
631: if (!strcmp(sys_signame[i], q + 3)) {
632: working->signal = i;
633: break;
634: }
635: }
636: if (i == NSIG)
637: errx(1, "unknown signal: %s", q);
638: } else
639: errx(1, "unrecognized field: %s", q);
1.14 millert 640: }
1.51 millert 641: free(errline);
642:
643: /* If there is an arcdir, set working->backdir. */
644: if (arcdir != NULL && working->logbase != NULL) {
645: if (*arcdir == '/') {
646: /* Fully qualified arcdir */
647: working->backdir = arcdir;
648: } else {
649: /* arcdir is relative to log's parent dir */
650: *(working->logbase - 1) = '\0';
651: if ((asprintf(&working->backdir, "%s/%s",
652: working->log, arcdir)) == -1)
653: err(1, "malloc");
654: *(working->logbase - 1) = '/';
655: }
656: /* Ignore arcdir if it doesn't exist. */
657: if (stat(working->backdir, &sb) != 0 ||
658: !S_ISDIR(sb.st_mode)) {
659: if (working->backdir != arcdir)
660: free(working->backdir);
661: working->backdir = NULL;
662: }
663: } else
664: working->backdir = NULL;
1.25 millert 665:
666: /* Make sure we can't oflow MAXPATHLEN */
1.51 millert 667: if (working->backdir != NULL) {
668: if (snprintf(line, sizeof(line), "%s/%s.%d%s",
669: working->backdir, working->logbase,
670: working->numlogs, COMPRESS_POSTFIX) >= MAXPATHLEN)
671: errx(1, "%s: pathname too long", working->log);
672: } else {
673: if (snprintf(line, sizeof(line), "%s.%d%s",
674: working->log, working->numlogs, COMPRESS_POSTFIX)
675: >= MAXPATHLEN)
676: errx(1, "%s: pathname too long", working->log);
677: }
1.35 deraadt 678: }
679: if (working)
680: working->next = NULL;
681: (void)fclose(f);
1.48 millert 682: return (first);
1.1 deraadt 683: }
684:
1.25 millert 685: char *
1.48 millert 686: missing_field(char *p, char *errline)
1.1 deraadt 687: {
1.35 deraadt 688: if (!p || !*p) {
1.14 millert 689: warnx("Missing field in config file line:");
1.35 deraadt 690: fputs(errline, stderr);
691: exit(1);
692: }
1.48 millert 693: return (p);
1.1 deraadt 694: }
695:
1.25 millert 696: void
1.51 millert 697: dotrim(struct conf_entry *ent)
1.35 deraadt 698: {
699: char file1[MAXPATHLEN], file2[MAXPATHLEN];
700: char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1.51 millert 701: char oldlog[MAXPATHLEN];
1.35 deraadt 702: int fd;
1.48 millert 703: struct stat sb;
1.51 millert 704: int numdays = ent->numlogs;
705:
706: /* Is there a separate backup dir? */
707: if (ent->backdir != NULL)
708: snprintf(oldlog, sizeof(oldlog), "%s/%s", ent->backdir,
709: ent->logbase);
710: else
711: strlcpy(oldlog, ent->log, sizeof(oldlog));
1.1 deraadt 712:
1.35 deraadt 713: /* Remove oldest log (may not exist) */
1.51 millert 714: (void)snprintf(file1, sizeof(file1), "%s.%d", oldlog, numdays);
715: (void)snprintf(zfile1, sizeof(zfile1), "%s.%d%s", oldlog, numdays,
1.35 deraadt 716: COMPRESS_POSTFIX);
717:
718: if (noaction) {
1.50 millert 719: printf("\trm -f %s %s\n", file1, zfile1);
1.35 deraadt 720: } else {
721: (void)unlink(file1);
722: (void)unlink(zfile1);
723: }
724:
725: /* Move down log files */
726: while (numdays--) {
1.48 millert 727: (void)strlcpy(file2, file1, sizeof(file2));
1.51 millert 728: (void)snprintf(file1, sizeof(file1), "%s.%d", oldlog, numdays);
1.48 millert 729: (void)strlcpy(zfile1, file1, sizeof(zfile1));
730: (void)strlcpy(zfile2, file2, sizeof(zfile2));
731: if (lstat(file1, &sb)) {
732: (void)strlcat(zfile1, COMPRESS_POSTFIX, sizeof(zfile1));
733: (void)strlcat(zfile2, COMPRESS_POSTFIX, sizeof(zfile2));
734: if (lstat(zfile1, &sb))
1.35 deraadt 735: continue;
736: }
737: if (noaction) {
1.50 millert 738: printf("\tmv %s %s\n", zfile1, zfile2);
1.51 millert 739: printf("\tchmod %o %s\n", ent->permissions, zfile2);
740: if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
1.50 millert 741: printf("\tchown %u:%u %s\n",
1.51 millert 742: ent->uid, ent->gid, zfile2);
1.35 deraadt 743: } else {
744: if (rename(zfile1, zfile2))
1.25 millert 745: warn("can't mv %s to %s", zfile1, zfile2);
1.51 millert 746: if (chmod(zfile2, ent->permissions))
1.25 millert 747: warn("can't chmod %s", zfile2);
1.51 millert 748: if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
749: if (chown(zfile2, ent->uid, ent->gid))
1.50 millert 750: warn("can't chown %s", zfile2);
1.35 deraadt 751: }
752: }
1.51 millert 753: if (!noaction && !(ent->flags & CE_BINARY))
754: (void)log_trim(ent->log); /* Report the trimming to the old log */
1.1 deraadt 755:
1.51 millert 756: (void)snprintf(file2, sizeof(file2), "%s.XXXXXXXXXX", ent->log);
1.35 deraadt 757: if (noaction) {
1.50 millert 758: printf("\tmktemp %s\n", file2);
1.35 deraadt 759: } else {
760: if ((fd = mkstemp(file2)) < 0)
1.26 millert 761: err(1, "can't start '%s' log", file2);
1.51 millert 762: if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
763: if (fchown(fd, ent->uid, ent->gid))
764: err(1, "can't chown '%s' log file", file2);
765: if (fchmod(fd, ent->permissions))
1.26 millert 766: err(1, "can't chmod '%s' log file", file2);
1.35 deraadt 767: (void)close(fd);
1.26 millert 768: /* Add status message */
1.51 millert 769: if (!(ent->flags & CE_BINARY) && log_trim(file2))
1.26 millert 770: err(1, "can't add status message to log '%s'", file2);
1.35 deraadt 771: }
1.26 millert 772:
1.51 millert 773: if (ent->numlogs == 0) {
1.5 deraadt 774: if (noaction)
1.51 millert 775: printf("\trm %s\n", ent->log);
776: else if (unlink(ent->log))
777: warn("can't rm %s", ent->log);
1.5 deraadt 778: } else {
1.51 millert 779: if (noaction)
780: printf("\tmv %s to %s\n", ent->log, file1);
781: else if (rename(ent->log, file1))
782: warn("can't to mv %s to %s", ent->log, file1);
1.5 deraadt 783: }
784:
1.26 millert 785: /* Now move the new log file into place */
786: if (noaction)
1.51 millert 787: printf("\tmv %s to %s\n", file2, ent->log);
788: else if (rename(file2, ent->log))
789: warn("can't to mv %s to %s", file2, ent->log);
1.1 deraadt 790: }
791:
792: /* Log the fact that the logs were turned over */
1.25 millert 793: int
1.48 millert 794: log_trim(char *log)
1.1 deraadt 795: {
1.35 deraadt 796: FILE *f;
1.25 millert 797:
1.35 deraadt 798: if ((f = fopen(log, "a")) == NULL)
1.48 millert 799: return (-1);
1.44 mpech 800: (void)fprintf(f, "%s %s newsyslog[%ld]: logfile turned over\n",
801: daytime, hostname, (long)getpid());
1.35 deraadt 802: if (fclose(f) == EOF)
803: err(1, "log_trim: fclose");
1.48 millert 804: return (0);
1.1 deraadt 805: }
806:
1.16 millert 807: /* Fork off compress or gzip to compress the old log file */
1.25 millert 808: void
1.51 millert 809: compress_log(struct conf_entry *ent)
1.1 deraadt 810: {
1.48 millert 811: pid_t pid;
812: char *base, tmp[MAXPATHLEN];
1.51 millert 813:
814: if (ent->backdir != NULL)
815: snprintf(tmp, sizeof(tmp), "%s/%s.0", ent->backdir,
816: ent->logbase);
817: else
818: snprintf(tmp, sizeof(tmp), "%s.0", ent->log);
819:
1.27 millert 820: if ((base = strrchr(COMPRESS, '/')) == NULL)
821: base = COMPRESS;
822: else
823: base++;
824: if (noaction) {
1.51 millert 825: printf("%s %s\n", base, tmp);
1.27 millert 826: return;
827: }
1.35 deraadt 828: pid = fork();
829: if (pid < 0) {
1.11 downsj 830: err(1, "fork");
1.50 millert 831: } else if (pid == 0) {
1.37 deraadt 832: (void)execl(COMPRESS, base, "-f", tmp, (char *)NULL);
1.16 millert 833: warn(COMPRESS);
834: _exit(1);
1.35 deraadt 835: }
1.1 deraadt 836: }
837:
838: /* Return size in kilobytes of a file */
1.25 millert 839: int
1.48 millert 840: sizefile(char *file)
1.1 deraadt 841: {
1.35 deraadt 842: struct stat sb;
1.1 deraadt 843:
1.35 deraadt 844: if (stat(file, &sb) < 0)
1.48 millert 845: return (-1);
846: return (sb.st_blocks / (1024.0 / DEV_BSIZE));
1.1 deraadt 847: }
848:
1.25 millert 849: /* Return the age (in hours) of old log file (file.0), or -1 if none */
850: int
1.51 millert 851: age_old_log(struct conf_entry *ent)
1.1 deraadt 852: {
1.35 deraadt 853: struct stat sb;
854: char tmp[MAXPATHLEN];
1.1 deraadt 855:
1.51 millert 856: if (ent->backdir != NULL)
857: snprintf(tmp, sizeof(tmp), "%s/%s.0", ent->backdir, ent->logbase);
858: else {
859: strlcpy(tmp, ent->log, sizeof(tmp));
860: strlcat(tmp, ".0", sizeof(tmp));
861: }
862: if (ent->flags & CE_COMPACT)
1.48 millert 863: strlcat(tmp, COMPRESS_POSTFIX, sizeof(tmp));
1.51 millert 864: if (stat(tmp, &sb) < 0)
865: return (-1);
1.48 millert 866: return ((int)(timenow - sb.st_mtime + 1800) / 3600);
1.1 deraadt 867: }
868:
869: /* Skip Over Blanks */
1.25 millert 870: char *
1.48 millert 871: sob(char *p)
1.1 deraadt 872: {
1.35 deraadt 873: while (p && *p && isspace(*p))
874: p++;
1.48 millert 875: return (p);
1.1 deraadt 876: }
877:
878: /* Skip Over Non-Blanks */
1.25 millert 879: char *
1.48 millert 880: son(char *p)
1.1 deraadt 881: {
1.35 deraadt 882: while (p && *p && !isspace(*p))
883: p++;
1.48 millert 884: return (p);
1.1 deraadt 885: }
886:
887: /* Check if string is actually a number */
1.25 millert 888: int
1.48 millert 889: isnumberstr(char *string)
1.1 deraadt 890: {
1.35 deraadt 891: while (*string) {
892: if (!isdigit(*string++))
1.48 millert 893: return (0);
1.35 deraadt 894: }
1.48 millert 895: return (1);
1.10 downsj 896: }
897:
1.25 millert 898: void
1.48 millert 899: domonitor(char *log, char *whom)
1.10 downsj 900: {
901: struct stat sb, tsb;
1.35 deraadt 902: char fname[MAXPATHLEN], *flog, *p, *rb = NULL;
1.10 downsj 903: FILE *fp;
904: off_t osize;
905: int rd;
906:
907: if (stat(log, &sb) < 0)
908: return;
909:
910: flog = strdup(log);
1.11 downsj 911: if (flog == NULL)
912: err(1, "strdup");
913:
1.10 downsj 914: for (p = flog; *p != '\0'; p++) {
915: if (*p == '/')
916: *p = '_';
917: }
1.48 millert 918: snprintf(fname, sizeof(fname), "%s/newsyslog.%s.size",
1.35 deraadt 919: STATS_DIR, flog);
1.10 downsj 920:
921: /* ..if it doesn't exist, simply record the current size. */
922: if ((sb.st_size == 0) || stat(fname, &tsb) < 0)
923: goto update;
924:
925: fp = fopen(fname, "r");
926: if (fp == NULL) {
1.34 millert 927: warn("%s", fname);
1.10 downsj 928: goto cleanup;
929: }
930: #ifdef QUAD_OFF_T
931: if (fscanf(fp, "%qd\n", &osize) != 1) {
932: #else
933: if (fscanf(fp, "%ld\n", &osize) != 1) {
934: #endif /* QUAD_OFF_T */
935: fclose(fp);
936: goto update;
937: }
938:
939: fclose(fp);
940:
941: /* If the file is smaller, mark the entire thing as changed. */
942: if (sb.st_size < osize)
943: osize = 0;
944:
945: /* Now see if current size is larger. */
946: if (sb.st_size > osize) {
947: rb = (char *) malloc(sb.st_size - osize);
1.11 downsj 948: if (rb == NULL)
949: err(1, "malloc");
1.10 downsj 950:
951: /* Open logfile, seek. */
952: fp = fopen(log, "r");
953: if (fp == NULL) {
1.34 millert 954: warn("%s", log);
1.10 downsj 955: goto cleanup;
956: }
957: fseek(fp, osize, SEEK_SET);
958: rd = fread(rb, 1, sb.st_size - osize, fp);
959: if (rd < 1) {
1.11 downsj 960: warn("fread");
1.10 downsj 961: fclose(fp);
962: goto cleanup;
963: }
964:
965: /* Send message. */
966: fclose(fp);
967:
968: fp = openmail();
969: if (fp == NULL) {
1.11 downsj 970: warn("openmail");
1.10 downsj 971: goto cleanup;
972: }
973: fprintf(fp, "To: %s\nSubject: LOGFILE NOTIFICATION: %s\n\n\n",
974: whom, log);
975: fwrite(rb, 1, rd, fp);
976: fputs("\n\n", fp);
977:
1.48 millert 978: pclose(fp);
1.10 downsj 979: }
980: update:
981: /* Reopen for writing and update file. */
982: fp = fopen(fname, "w");
983: if (fp == NULL) {
1.34 millert 984: warn("%s", fname);
1.10 downsj 985: goto cleanup;
986: }
987: #ifdef QUAD_OFF_T
988: fprintf(fp, "%qd\n", sb.st_size);
989: #else
990: fprintf(fp, "%ld\n", sb.st_size);
991: #endif /* QUAD_OFF_T */
992: fclose(fp);
993:
994: cleanup:
995: free(flog);
996: if (rb != NULL)
997: free(rb);
998: }
999:
1.25 millert 1000: FILE *
1.48 millert 1001: openmail(void)
1.10 downsj 1002: {
1.48 millert 1003: FILE *ret;
1.35 deraadt 1004: char *cmdbuf = NULL;
1.10 downsj 1005:
1.35 deraadt 1006: asprintf(&cmdbuf, "%s -t", SENDMAIL);
1007: if (cmdbuf) {
1008: ret = popen(cmdbuf, "w");
1009: free(cmdbuf);
1010: return (ret);
1011: }
1012: return (NULL);
1.10 downsj 1013: }
1014:
1.25 millert 1015: void
1.48 millert 1016: child_killer(int signo)
1.16 millert 1017: {
1.38 deraadt 1018: int save_errno = errno;
1.16 millert 1019: int status;
1020:
1021: while (waitpid(-1, &status, WNOHANG) > 0)
1022: ;
1.38 deraadt 1023: errno = save_errno;
1.1 deraadt 1024: }
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