Annotation of src/usr.bin/newsyslog/newsyslog.c, Revision 1.44
1.44 ! mpech 1: /* $OpenBSD: newsyslog.c,v 1.43 2002/02/16 21:27:50 millert Exp $ */
1.10 downsj 2:
3: /*
1.30 millert 4: * Copyright (c) 1999 Todd C. Miller <Todd.Miller@courtesan.com>
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: /*
67:
68: Copyright 1988, 1989 by the Massachusetts Institute of Technology
69:
70: Permission to use, copy, modify, and distribute this software
71: and its documentation for any purpose and without fee is
72: hereby granted, provided that the above copyright notice
73: appear in all copies and that both that copyright notice and
74: this permission notice appear in supporting documentation,
75: and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
76: used in advertising or publicity pertaining to distribution
77: of the software without specific, written prior permission.
78: M.I.T. and the M.I.T. S.I.P.B. make no representations about
79: the suitability of this software for any purpose. It is
80: provided "as is" without express or implied warranty.
81:
82: */
83:
84: /*
85: * newsyslog - roll over selected logs at the appropriate time,
86: * keeping the a specified number of backup files around.
87: *
88: */
89:
90: #ifndef lint
1.44 ! mpech 91: static char rcsid[] = "$OpenBSD: newsyslog.c,v 1.43 2002/02/16 21:27:50 millert Exp $";
1.1 deraadt 92: #endif /* not lint */
93:
94: #ifndef CONF
95: #define CONF "/etc/athena/newsyslog.conf" /* Configuration file */
96: #endif
97: #ifndef PIDFILE
98: #define PIDFILE "/etc/syslog.pid"
99: #endif
100: #ifndef COMPRESS
101: #define COMPRESS "/usr/ucb/compress" /* File compression program */
102: #endif
103: #ifndef COMPRESS_POSTFIX
104: #define COMPRESS_POSTFIX ".Z"
105: #endif
1.10 downsj 106: #ifndef STATS_DIR
107: #define STATS_DIR "/etc"
108: #endif
109: #ifndef SENDMAIL
110: #define SENDMAIL "/usr/lib/sendmail"
111: #endif
1.1 deraadt 112:
113: #include <stdio.h>
1.9 downsj 114: #include <sys/types.h>
115: #include <sys/time.h>
116: #include <sys/stat.h>
117: #include <sys/param.h>
118: #include <sys/wait.h>
1.1 deraadt 119: #include <stdlib.h>
120: #include <string.h>
121: #include <ctype.h>
122: #include <signal.h>
1.9 downsj 123: #include <fcntl.h>
1.1 deraadt 124: #include <pwd.h>
125: #include <grp.h>
1.38 deraadt 126: #include <errno.h>
1.9 downsj 127: #include <unistd.h>
1.11 downsj 128: #include <err.h>
1.1 deraadt 129:
1.26 millert 130: #define CE_ROTATED 0x01 /* Log file has been rotated */
131: #define CE_COMPACT 0x02 /* Compact the achived log files */
132: #define CE_BINARY 0x04 /* Logfile is in binary, don't add */
1.10 downsj 133: /* status messages */
1.26 millert 134: #define CE_MONITOR 0x08 /* Monitory for changes */
1.1 deraadt 135: #define NONE -1
1.35 deraadt 136:
1.1 deraadt 137: struct conf_entry {
1.35 deraadt 138: char *log; /* Name of the log */
139: uid_t uid; /* Owner of log */
140: gid_t gid; /* Group of log */
141: int numlogs; /* Number of logs to keep */
142: int size; /* Size cutoff to trigger trimming the log */
143: int hours; /* Hours between log trimming */
144: int permissions; /* File permissions on the log */
1.30 millert 145: int signal; /* Signal to send (defaults to SIGHUP) */
1.35 deraadt 146: int flags; /* Flags (CE_COMPACT & CE_BINARY) */
1.10 downsj 147: char *whom; /* Whom to notify if logfile changes */
1.30 millert 148: char *pidfile; /* Path to file containg pid to signal */
149: char *runcmd; /* Command to run instead of sending a signal */
1.35 deraadt 150: struct conf_entry *next; /* Linked list pointer */
1.1 deraadt 151: };
152:
1.30 millert 153: struct pidinfo {
154: char *file;
155: int signal;
156: };
157:
1.35 deraadt 158: int verbose = 0; /* Print out what's going on */
159: int needroot = 1; /* Root privs are necessary */
160: int noaction = 0; /* Don't do anything, just show it */
1.33 millert 161: int monitormode = 0; /* Don't do monitoring by default */
1.35 deraadt 162: char *conf = CONF; /* Configuration file to use */
1.1 deraadt 163: time_t timenow;
1.16 millert 164: #define MIN_PID 4
1.7 deraadt 165: char hostname[MAXHOSTNAMELEN]; /* hostname */
1.35 deraadt 166: char *daytime; /* timenow in human readable form */
1.1 deraadt 167:
168:
1.43 millert 169: void do_entry(struct conf_entry *);
170: void PRS(int, char **);
171: void usage(void);
172: struct conf_entry *parse_file(int *);
173: char *missing_field(char *, char *);
174: void dotrim(char *, int, int, int, uid_t, gid_t);
175: int log_trim(char *);
176: void compress_log(char *);
177: int sizefile(char *);
178: int age_old_log(char *);
179: char *sob(char *);
180: char *son(char *);
181: int isnumberstr(char *);
182: void domonitor(char *, char *);
183: FILE *openmail(void);
184: void closemail(FILE *);
185: void child_killer(int);
186: void run_command(char *);
187: void send_signal(char *, int);
1.1 deraadt 188:
1.25 millert 189: int
190: main(argc, argv)
1.35 deraadt 191: int argc;
192: char **argv;
1.1 deraadt 193: {
1.35 deraadt 194: struct conf_entry *p, *q;
1.30 millert 195: struct pidinfo *pidlist, *pl;
1.28 millert 196: int status, listlen;
1.35 deraadt 197:
198: PRS(argc, argv);
199: if (needroot && getuid() && geteuid())
1.11 downsj 200: errx(1, "You must be root.");
1.35 deraadt 201: p = q = parse_file(&listlen);
1.16 millert 202: signal(SIGCHLD, child_killer);
1.26 millert 203:
1.30 millert 204: pidlist = (struct pidinfo *)calloc(sizeof(struct pidinfo), listlen + 1);
205: if (pidlist == NULL)
1.28 millert 206: err(1, "calloc");
207:
1.26 millert 208: /* Step 1, rotate all log files */
1.35 deraadt 209: while (q) {
210: do_entry(q);
211: q = q->next;
212: }
1.26 millert 213:
1.28 millert 214: /* Step 2, make a list of unique pid files */
1.30 millert 215: for (q = p, pl = pidlist; q; ) {
1.28 millert 216: if (q->flags & CE_ROTATED) {
1.30 millert 217: struct pidinfo *pltmp;
1.28 millert 218:
1.30 millert 219: for (pltmp = pidlist; pltmp < pl; pltmp++) {
220: if ((strcmp(pltmp->file, q->pidfile) == 0 &&
221: pltmp->signal == q->signal) || (q->runcmd &&
222: strcmp(q->runcmd, pltmp->file) == 0))
1.28 millert 223: break;
1.30 millert 224: }
225: if (pltmp == pl) { /* unique entry */
226: if (q->runcmd) {
227: pl->file = q->runcmd;
228: pl->signal = -1;
229: } else {
230: pl->file = q->pidfile;
231: pl->signal = q->signal;
232: }
1.31 millert 233: pl++;
1.30 millert 234: }
1.28 millert 235: }
1.35 deraadt 236: q = q->next;
237: }
1.26 millert 238:
1.30 millert 239: /* Step 3, send a signal or run a command */
240: for (pl = pidlist; pl->file; pl++) {
241: if (pl->signal == -1)
242: run_command(pl->file);
243: else
244: send_signal(pl->file, pl->signal);
245: }
1.28 millert 246: if (!noaction)
247: sleep(5);
248:
249: /* Step 4, compress the log.0 file if configured to do so and free */
1.35 deraadt 250: while (p) {
1.26 millert 251: if ((p->flags & CE_COMPACT) && (p->flags & CE_ROTATED))
252: compress_log(p->log);
253: q = p;
1.35 deraadt 254: p = p->next;
255: free(q);
256: }
1.16 millert 257:
258: /* Wait for children to finish, then exit */
259: while (waitpid(-1, &status, 0) != -1)
260: ;
1.35 deraadt 261: exit(0);
1.1 deraadt 262: }
263:
1.25 millert 264: void
265: do_entry(ent)
1.35 deraadt 266: struct conf_entry *ent;
267:
1.1 deraadt 268: {
1.25 millert 269: int modtime, size;
1.14 millert 270:
1.19 kstailey 271: if (verbose)
272: printf("%s <%d%s>: ", ent->log, ent->numlogs,
273: (ent->flags & CE_COMPACT) ? "Z" : "");
1.35 deraadt 274: size = sizefile(ent->log);
275: modtime = age_old_log(ent->log);
276: if (size < 0) {
277: if (verbose)
278: printf("does not exist.\n");
279: } else {
280: if (verbose && (ent->size > 0))
281: printf("size (Kb): %d [%d] ", size, ent->size);
282: if (verbose && (ent->hours > 0))
283: printf(" age (hr): %d [%d] ", modtime, ent->hours);
1.33 millert 284: if (monitormode && ent->flags & CE_MONITOR)
1.10 downsj 285: domonitor(ent->log, ent->whom);
1.35 deraadt 286: if (!monitormode && (((ent->size > 0) && (size >= ent->size)) ||
1.40 deraadt 287: ((ent->hours > 0) && ((modtime >= ent->hours) ||
288: (modtime < 0))))) {
1.35 deraadt 289: if (verbose)
290: printf("--> trimming log....\n");
1.19 kstailey 291: if (noaction && !verbose)
292: printf("%s <%d%s>: ", ent->log, ent->numlogs,
293: (ent->flags & CE_COMPACT) ? "Z" : "");
1.35 deraadt 294: dotrim(ent->log, ent->numlogs, ent->flags,
1.40 deraadt 295: ent->permissions, ent->uid, ent->gid);
1.26 millert 296: ent->flags |= CE_ROTATED;
1.35 deraadt 297: } else if (verbose)
1.25 millert 298: printf("--> skipping\n");
1.35 deraadt 299: }
1.1 deraadt 300: }
301:
1.30 millert 302: /* Run the specified command */
303: void
304: run_command(cmd)
305: char *cmd;
306: {
307:
308: if (noaction)
309: (void)printf("run %s\n", cmd);
310: else
311: system(cmd);
312: }
313:
314: /* Send a signal to the pid specified by pidfile */
1.26 millert 315: void
1.30 millert 316: send_signal(pidfile, signal)
1.26 millert 317: char *pidfile;
1.30 millert 318: int signal;
1.26 millert 319: {
1.35 deraadt 320: char line[BUFSIZ];
1.26 millert 321: pid_t pid = 0;
1.40 deraadt 322: FILE *f;
323: unsigned long ulval;
324: char *ep;
325: char *err;
1.26 millert 326:
1.35 deraadt 327: if ((f = fopen(pidfile, "r")) == NULL) {
1.26 millert 328: warn("can't open %s", pidfile);
329: return;
330: }
331:
1.42 millert 332: errno = 0;
333: err = NULL;
1.40 deraadt 334: if (fgets(line, sizeof(line), f)) {
335: ulval = strtoul(line, &ep, 10);
1.41 marc 336: if (line[0] == '\0' || (*ep != '\0' && *ep != '\n'))
1.40 deraadt 337: err = "invalid number in";
338: else if (errno == ERANGE && ulval == ULONG_MAX)
339: err = "out of range number in";
340: else if (ulval == 0)
341: err = "no number in";
342: else if (ulval < MIN_PID)
343: err = "preposterous process number in";
344: else
345: pid = ulval;
1.42 millert 346: } else {
347: if (errno == 0)
348: err = "empty";
349: else
350: err = "error reading";
1.40 deraadt 351: }
1.26 millert 352: (void)fclose(f);
353:
1.40 deraadt 354: if (err)
355: warnx("%s pid file: %s", err, pidfile);
356: else if (noaction)
1.44 ! mpech 357: (void)printf("kill -%s %ld\n", sys_signame[signal], (long)pid);
1.30 millert 358: else if (kill(pid, signal))
359: warnx("warning - could not send SIG%s to daemon",
360: sys_signame[signal]);
1.26 millert 361: }
362:
1.25 millert 363: void
364: PRS(argc, argv)
1.35 deraadt 365: int argc;
366: char **argv;
1.1 deraadt 367: {
1.35 deraadt 368: int c;
1.1 deraadt 369: char *p;
370:
1.35 deraadt 371: timenow = time(NULL);
372: daytime = ctime(&timenow) + 4;
373: daytime[15] = '\0';
1.1 deraadt 374:
1.35 deraadt 375: /* Let's get our hostname */
376: (void)gethostname(hostname, sizeof(hostname));
1.1 deraadt 377:
378: /* Truncate domain */
1.9 downsj 379: p = strchr(hostname, '.');
380: if (p)
1.1 deraadt 381: *p = '\0';
382:
1.35 deraadt 383: optind = 1; /* Start options parsing */
1.36 aaron 384: while ((c = getopt(argc, argv, "nrvmf:")) != -1) {
1.35 deraadt 385: switch (c) {
386: case 'n':
387: noaction++; /* This implies needroot as off */
388: /* fall through */
389: case 'r':
390: needroot = 0;
391: break;
392: case 'v':
393: verbose++;
394: break;
395: case 'f':
396: conf = optarg;
397: break;
1.10 downsj 398: case 'm':
1.33 millert 399: monitormode++;
1.10 downsj 400: break;
1.35 deraadt 401: default:
402: usage();
403: }
404: }
1.9 downsj 405: }
1.1 deraadt 406:
1.25 millert 407: void
408: usage()
1.1 deraadt 409: {
1.25 millert 410: extern const char *__progname;
411:
1.36 aaron 412: (void)fprintf(stderr, "usage: %s [-mnrv] [-f config_file]\n",
1.25 millert 413: __progname);
1.14 millert 414: exit(1);
1.1 deraadt 415: }
416:
417: /* Parse a configuration file and return a linked list of all the logs
418: * to process
419: */
1.25 millert 420: struct conf_entry *
1.28 millert 421: parse_file(nentries)
422: int *nentries;
1.1 deraadt 423: {
1.35 deraadt 424: FILE *f;
425: char line[BUFSIZ], *parse, *q;
426: char *errline, *group, *tmp;
427: struct conf_entry *first = NULL;
428: struct conf_entry *working = NULL;
429: struct passwd *pass;
430: struct group *grp;
1.1 deraadt 431:
1.35 deraadt 432: if (strcmp(conf, "-") == 0)
433: f = stdin;
1.25 millert 434: else {
1.35 deraadt 435: if ((f = fopen(conf, "r")) == NULL)
1.25 millert 436: err(1, "can't open %s", conf);
437: }
1.11 downsj 438:
1.28 millert 439: *nentries = 0;
1.35 deraadt 440: while (fgets(line, sizeof(line), f)) {
441: if ((line[0] == '\n') || (line[0] == '#'))
442: continue;
443: errline = strdup(line);
1.11 downsj 444: if (errline == NULL)
445: err(1, "strdup");
1.28 millert 446: (*nentries)++;
1.35 deraadt 447: if (!first) {
448: working = (struct conf_entry *) malloc(sizeof(struct conf_entry));
1.11 downsj 449: if (working == NULL)
450: err(1, "malloc");
1.35 deraadt 451: first = working;
452: } else {
453: working->next = (struct conf_entry *) malloc(sizeof(struct conf_entry));
1.11 downsj 454: if (working->next == NULL)
455: err(1, "malloc");
1.35 deraadt 456: working = working->next;
457: }
1.1 deraadt 458:
1.35 deraadt 459: q = parse = missing_field(sob(line), errline);
460: *(parse = son(line)) = '\0';
461: working->log = strdup(q);
1.11 downsj 462: if (working->log == NULL)
463: err(1, "strdup");
1.1 deraadt 464:
1.35 deraadt 465: q = parse = missing_field(sob(++parse), errline);
466: *(parse = son(parse)) = '\0';
1.25 millert 467: if ((group = strchr(q, '.')) != NULL) {
468: *group++ = '\0';
469: if (*q) {
470: if (!(isnumberstr(q))) {
471: if ((pass = getpwnam(q)) == NULL)
472: errx(1, "Error in config file; unknown user: %s", q);
473: working->uid = pass->pw_uid;
474: } else
475: working->uid = atoi(q);
476: } else
477: working->uid = NONE;
478:
479: q = group;
480: if (*q) {
481: if (!(isnumberstr(q))) {
482: if ((grp = getgrnam(q)) == NULL)
483: errx(1, "Error in config file; unknown group: %s", q);
484: working->gid = grp->gr_gid;
485: } else
486: working->gid = atoi(q);
487: } else
488: working->gid = NONE;
489:
490: q = parse = missing_field(sob(++parse), errline);
491: *(parse = son(parse)) = '\0';
492: } else
493: working->uid = working->gid = NONE;
1.1 deraadt 494:
1.35 deraadt 495: if (!sscanf(q, "%o", &working->permissions))
1.11 downsj 496: errx(1, "Error in config file; bad permissions: %s", q);
1.1 deraadt 497:
1.35 deraadt 498: q = parse = missing_field(sob(++parse), errline);
499: *(parse = son(parse)) = '\0';
500: if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1.11 downsj 501: errx(1, "Error in config file; bad number: %s", q);
1.1 deraadt 502:
1.35 deraadt 503: q = parse = missing_field(sob(++parse), errline);
504: *(parse = son(parse)) = '\0';
505: if (isdigit(*q))
506: working->size = atoi(q);
507: else
508: working->size = -1;
509:
510: q = parse = missing_field(sob(++parse), errline);
511: *(parse = son(parse)) = '\0';
512: if (isdigit(*q))
513: working->hours = atoi(q);
514: else
515: working->hours = -1;
1.1 deraadt 516:
1.35 deraadt 517: working->flags = 0;
518: q = sob(++parse); /* Optional field */
1.32 millert 519: if (*q == 'Z' || *q == 'z' || *q == 'B' || *q == 'b' ||
520: *q == 'M' || *q == 'm') {
521: *(parse = son(q)) = '\0';
522: while (*q) {
523: switch (*q) {
524: case 'Z':
525: case 'z':
526: working->flags |= CE_COMPACT;
527: break;
528: case 'B':
529: case 'b':
530: working->flags |= CE_BINARY;
531: break;
532: case 'M':
533: case 'm':
534: working->flags |= CE_MONITOR;
535: break;
536: default:
537: errx(1, "Illegal flag in config file: %c", *q);
538: break;
539: }
540: q++;
541: }
542: } else
1.40 deraadt 543: parse--; /* no flags so undo */
1.10 downsj 544:
545: working->whom = NULL;
546: if (working->flags & CE_MONITOR) { /* Optional field */
547: q = parse = sob(++parse);
548: *(parse = son(parse)) = '\0';
549:
550: working->whom = strdup(q);
1.11 downsj 551: if (working->log == NULL)
552: err(1, "strdup");
1.10 downsj 553: }
1.14 millert 554:
555: working->pidfile = PIDFILE;
1.30 millert 556: working->signal = SIGHUP;
557: working->runcmd = NULL;
558: for (;;) {
559: q = parse = sob(++parse); /* Optional field */
560: if (q == NULL || *q == '\0')
561: break;
562: if (*q == '/') {
563: *(parse = son(parse)) = '\0';
564: if (strlen(q) >= MAXPATHLEN)
565: errx(1, "%s: pathname too long", q);
566: working->pidfile = strdup(q);
567: if (working->pidfile == NULL)
568: err(1, "strdup");
569: } else if (*q == '"' && (tmp = strchr(q + 1, '"'))) {
570: *(parse = tmp) = '\0';
571: working->runcmd = strdup(++q);
572: if (working->runcmd == NULL)
573: err(1, "strdup");
574: } else if (strncmp(q, "SIG", 3) == 0) {
575: int i;
576:
577: *(parse = son(parse)) = '\0';
578: for (i = 1; i < NSIG; i++) {
579: if (!strcmp(sys_signame[i], q + 3)) {
580: working->signal = i;
581: break;
582: }
583: }
584: if (i == NSIG)
585: errx(1, "unknown signal: %s", q);
586: } else
587: errx(1, "unrecognized field: %s", q);
1.14 millert 588: }
1.25 millert 589:
590: /* Make sure we can't oflow MAXPATHLEN */
591: if (asprintf(&tmp, "%s.%d%s", working->log, working->numlogs,
592: COMPRESS_POSTFIX) >= MAXPATHLEN)
593: errx(1, "%s: pathname too long", working->log);
1.35 deraadt 594:
595: if (tmp)
596: free(tmp);
597: free(errline);
598: }
599: if (working)
600: working->next = NULL;
601: (void)fclose(f);
602: return(first);
1.1 deraadt 603: }
604:
1.25 millert 605: char *
606: missing_field(p, errline)
1.35 deraadt 607: char *p;
1.25 millert 608: char *errline;
1.1 deraadt 609: {
1.35 deraadt 610: if (!p || !*p) {
1.14 millert 611: warnx("Missing field in config file line:");
1.35 deraadt 612: fputs(errline, stderr);
613: exit(1);
614: }
615: return(p);
1.1 deraadt 616: }
617:
1.25 millert 618: void
1.26 millert 619: dotrim(log, numdays, flags, perm, owner_uid, group_gid)
1.35 deraadt 620: char *log;
621: int numdays;
622: int flags;
623: int perm;
624: uid_t owner_uid;
625: gid_t group_gid;
626: {
627: char file1[MAXPATHLEN], file2[MAXPATHLEN];
628: char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
629: int fd;
630: struct stat st;
1.6 tholo 631: int days = numdays;
1.1 deraadt 632:
1.35 deraadt 633: /* Remove oldest log (may not exist) */
634: (void)snprintf(file1, sizeof file1, "%s.%d", log, numdays);
635: (void)snprintf(zfile1, sizeof zfile1, "%s.%d%s", log, numdays,
636: COMPRESS_POSTFIX);
637:
638: if (noaction) {
639: printf("rm -f %s %s\n", file1, zfile1);
640: } else {
641: (void)unlink(file1);
642: (void)unlink(zfile1);
643: }
644:
645: /* Move down log files */
646: while (numdays--) {
647: (void)strlcpy(file2, file1, sizeof file2);
648: (void)snprintf(file1, sizeof file1, "%s.%d", log, numdays);
649: (void)strlcpy(zfile1, file1, sizeof zfile1);
650: (void)strlcpy(zfile2, file2, sizeof zfile2);
651: if (lstat(file1, &st)) {
652: (void)strlcat(zfile1, COMPRESS_POSTFIX, sizeof zfile1);
653: (void)strlcat(zfile2, COMPRESS_POSTFIX, sizeof zfile2);
654: if (lstat(zfile1, &st))
655: continue;
656: }
657: if (noaction) {
658: printf("mv %s %s\n", zfile1, zfile2);
659: printf("chmod %o %s\n", perm, zfile2);
1.40 deraadt 660: printf("chown %u:%u %s\n",
661: owner_uid, group_gid, zfile2);
1.35 deraadt 662: } else {
663: if (rename(zfile1, zfile2))
1.25 millert 664: warn("can't mv %s to %s", zfile1, zfile2);
1.35 deraadt 665: if (chmod(zfile2, perm))
1.25 millert 666: warn("can't chmod %s", zfile2);
1.35 deraadt 667: if (chown(zfile2, owner_uid, group_gid))
1.25 millert 668: warn("can't chown %s", zfile2);
1.35 deraadt 669: }
670: }
671: if (!noaction && !(flags & CE_BINARY))
672: (void)log_trim(log); /* Report the trimming to the old log */
1.1 deraadt 673:
1.26 millert 674: (void)snprintf(file2, sizeof(file2), "%s.XXXXXXXXXX", log);
1.35 deraadt 675: if (noaction) {
676: printf("Create new log file...\n");
677: } else {
678: if ((fd = mkstemp(file2)) < 0)
1.26 millert 679: err(1, "can't start '%s' log", file2);
1.35 deraadt 680: if (fchown(fd, owner_uid, group_gid))
1.26 millert 681: err(1, "can't chown '%s' log file", file2);
1.35 deraadt 682: if (fchmod(fd, perm))
1.26 millert 683: err(1, "can't chmod '%s' log file", file2);
1.35 deraadt 684: (void)close(fd);
1.26 millert 685: /* Add status message */
1.35 deraadt 686: if (!(flags & CE_BINARY) && log_trim(file2))
1.26 millert 687: err(1, "can't add status message to log '%s'", file2);
1.35 deraadt 688: }
1.26 millert 689:
1.6 tholo 690: if (days == 0) {
1.5 deraadt 691: if (noaction)
1.25 millert 692: printf("rm %s\n", log);
693: else if (unlink(log))
694: warn("can't rm %s", log);
1.5 deraadt 695: } else {
696: if (noaction)
1.35 deraadt 697: printf("mv %s to %s\n", log, file1);
698: else if (rename(log, file1))
1.25 millert 699: warn("can't to mv %s to %s", log, file1);
1.5 deraadt 700: }
701:
1.26 millert 702: /* Now move the new log file into place */
703: if (noaction)
704: printf("mv %s to %s\n", file2, log);
705: else if (rename(file2, log))
706: warn("can't to mv %s to %s", file2, log);
1.1 deraadt 707: }
708:
709: /* Log the fact that the logs were turned over */
1.25 millert 710: int
711: log_trim(log)
1.17 deraadt 712: char *log;
1.1 deraadt 713: {
1.35 deraadt 714: FILE *f;
1.25 millert 715:
1.35 deraadt 716: if ((f = fopen(log, "a")) == NULL)
717: return(-1);
1.44 ! mpech 718: (void)fprintf(f, "%s %s newsyslog[%ld]: logfile turned over\n",
! 719: daytime, hostname, (long)getpid());
1.35 deraadt 720: if (fclose(f) == EOF)
721: err(1, "log_trim: fclose");
722: return(0);
1.1 deraadt 723: }
724:
1.16 millert 725: /* Fork off compress or gzip to compress the old log file */
1.25 millert 726: void
727: compress_log(log)
1.35 deraadt 728: char *log;
1.1 deraadt 729: {
1.35 deraadt 730: pid_t pid;
1.27 millert 731: char *base;
1.35 deraadt 732: char tmp[MAXPATHLEN];
733:
1.27 millert 734: if ((base = strrchr(COMPRESS, '/')) == NULL)
735: base = COMPRESS;
736: else
737: base++;
738: if (noaction) {
739: printf("%s %s.0\n", base, log);
740: return;
741: }
1.35 deraadt 742: pid = fork();
743: (void)snprintf(tmp, sizeof tmp, "%s.0", log);
744: if (pid < 0) {
1.11 downsj 745: err(1, "fork");
1.35 deraadt 746: } else if (!pid) {
1.37 deraadt 747: (void)execl(COMPRESS, base, "-f", tmp, (char *)NULL);
1.16 millert 748: warn(COMPRESS);
749: _exit(1);
1.35 deraadt 750: }
1.1 deraadt 751: }
752:
753: /* Return size in kilobytes of a file */
1.25 millert 754: int
755: sizefile(file)
1.35 deraadt 756: char *file;
1.1 deraadt 757: {
1.35 deraadt 758: struct stat sb;
1.1 deraadt 759:
1.35 deraadt 760: if (stat(file, &sb) < 0)
761: return(-1);
762: return(sb.st_blocks / (1024.0 / DEV_BSIZE));
1.1 deraadt 763: }
764:
1.25 millert 765: /* Return the age (in hours) of old log file (file.0), or -1 if none */
766: int
767: age_old_log(file)
1.35 deraadt 768: char *file;
1.1 deraadt 769: {
1.35 deraadt 770: struct stat sb;
771: char tmp[MAXPATHLEN];
1.1 deraadt 772:
1.35 deraadt 773: (void)strlcpy(tmp, file, sizeof tmp);
774: strlcat(tmp, ".0", sizeof tmp);
775: if (stat(tmp, &sb) < 0) {
776: strlcat(tmp, COMPRESS_POSTFIX, sizeof tmp);
777: if (stat(tmp, &sb) < 0)
778: return(-1);
779: }
780: return( (int) (timenow - sb.st_mtime + 1800) / 3600);
1.1 deraadt 781: }
782:
783: /* Skip Over Blanks */
1.25 millert 784: char *
785: sob(p)
1.39 mpech 786: char *p;
1.1 deraadt 787: {
1.35 deraadt 788: while (p && *p && isspace(*p))
789: p++;
790: return(p);
1.1 deraadt 791: }
792:
793: /* Skip Over Non-Blanks */
1.25 millert 794: char *
795: son(p)
1.39 mpech 796: char *p;
1.1 deraadt 797: {
1.35 deraadt 798: while (p && *p && !isspace(*p))
799: p++;
800: return(p);
1.1 deraadt 801: }
802:
803: /* Check if string is actually a number */
1.25 millert 804: int
805: isnumberstr(string)
1.10 downsj 806: char *string;
1.1 deraadt 807: {
1.35 deraadt 808: while (*string) {
809: if (!isdigit(*string++))
810: return(0);
811: }
812: return(1);
1.10 downsj 813: }
814:
1.25 millert 815: void
816: domonitor(log, whom)
1.10 downsj 817: char *log, *whom;
818: {
819: struct stat sb, tsb;
1.35 deraadt 820: char fname[MAXPATHLEN], *flog, *p, *rb = NULL;
1.10 downsj 821: FILE *fp;
822: off_t osize;
823: int rd;
824:
825: if (stat(log, &sb) < 0)
826: return;
827:
828: flog = strdup(log);
1.11 downsj 829: if (flog == NULL)
830: err(1, "strdup");
831:
1.10 downsj 832: for (p = flog; *p != '\0'; p++) {
833: if (*p == '/')
834: *p = '_';
835: }
1.35 deraadt 836: snprintf(fname, sizeof fname, "%s/newsyslog.%s.size",
837: STATS_DIR, flog);
1.10 downsj 838:
839: /* ..if it doesn't exist, simply record the current size. */
840: if ((sb.st_size == 0) || stat(fname, &tsb) < 0)
841: goto update;
842:
843: fp = fopen(fname, "r");
844: if (fp == NULL) {
1.34 millert 845: warn("%s", fname);
1.10 downsj 846: goto cleanup;
847: }
848: #ifdef QUAD_OFF_T
849: if (fscanf(fp, "%qd\n", &osize) != 1) {
850: #else
851: if (fscanf(fp, "%ld\n", &osize) != 1) {
852: #endif /* QUAD_OFF_T */
853: fclose(fp);
854: goto update;
855: }
856:
857: fclose(fp);
858:
859: /* If the file is smaller, mark the entire thing as changed. */
860: if (sb.st_size < osize)
861: osize = 0;
862:
863: /* Now see if current size is larger. */
864: if (sb.st_size > osize) {
865: rb = (char *) malloc(sb.st_size - osize);
1.11 downsj 866: if (rb == NULL)
867: err(1, "malloc");
1.10 downsj 868:
869: /* Open logfile, seek. */
870: fp = fopen(log, "r");
871: if (fp == NULL) {
1.34 millert 872: warn("%s", log);
1.10 downsj 873: goto cleanup;
874: }
875: fseek(fp, osize, SEEK_SET);
876: rd = fread(rb, 1, sb.st_size - osize, fp);
877: if (rd < 1) {
1.11 downsj 878: warn("fread");
1.10 downsj 879: fclose(fp);
880: goto cleanup;
881: }
882:
883: /* Send message. */
884: fclose(fp);
885:
886: fp = openmail();
887: if (fp == NULL) {
1.11 downsj 888: warn("openmail");
1.10 downsj 889: goto cleanup;
890: }
891: fprintf(fp, "To: %s\nSubject: LOGFILE NOTIFICATION: %s\n\n\n",
892: whom, log);
893: fwrite(rb, 1, rd, fp);
894: fputs("\n\n", fp);
895:
896: closemail(fp);
897: }
898: update:
899: /* Reopen for writing and update file. */
900: fp = fopen(fname, "w");
901: if (fp == NULL) {
1.34 millert 902: warn("%s", fname);
1.10 downsj 903: goto cleanup;
904: }
905: #ifdef QUAD_OFF_T
906: fprintf(fp, "%qd\n", sb.st_size);
907: #else
908: fprintf(fp, "%ld\n", sb.st_size);
909: #endif /* QUAD_OFF_T */
910: fclose(fp);
911:
912: cleanup:
913: free(flog);
914: if (rb != NULL)
915: free(rb);
916: }
917:
1.25 millert 918: FILE *
919: openmail()
1.10 downsj 920: {
1.35 deraadt 921: char *cmdbuf = NULL;
1.10 downsj 922: FILE *ret;
923:
1.35 deraadt 924: asprintf(&cmdbuf, "%s -t", SENDMAIL);
925: if (cmdbuf) {
926: ret = popen(cmdbuf, "w");
927: free(cmdbuf);
928: return (ret);
929: }
930: return (NULL);
1.10 downsj 931: }
932:
1.25 millert 933: void
934: closemail(pfp)
1.10 downsj 935: FILE *pfp;
936: {
937: pclose(pfp);
1.16 millert 938: }
939:
1.25 millert 940: void
941: child_killer(signum)
1.16 millert 942: int signum;
943: {
1.38 deraadt 944: int save_errno = errno;
1.16 millert 945: int status;
946:
947: while (waitpid(-1, &status, WNOHANG) > 0)
948: ;
1.38 deraadt 949: errno = save_errno;
1.1 deraadt 950: }
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