Annotation of src/usr.bin/newsyslog/newsyslog.c, Revision 1.32
1.32 ! millert 1: /* $OpenBSD: newsyslog.c,v 1.31 2000/06/10 02:49:41 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
1.32 ! millert 91: static char rcsid[] = "$OpenBSD: newsyslog.c,v 1.31 2000/06/10 02:49:41 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>
1.9 downsj 126: #include <unistd.h>
1.11 downsj 127: #include <err.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 */
1.1 deraadt 134: #define NONE -1
135:
136: struct conf_entry {
137: char *log; /* Name of the log */
1.25 millert 138: uid_t uid; /* Owner of log */
139: gid_t gid; /* Group of log */
1.1 deraadt 140: int numlogs; /* Number of logs to keep */
141: int size; /* Size cutoff to trigger trimming the log */
142: int hours; /* Hours between log trimming */
143: int permissions; /* File permissions on the log */
1.30 millert 144: int signal; /* Signal to send (defaults to SIGHUP) */
1.1 deraadt 145: int flags; /* Flags (CE_COMPACT & CE_BINARY) */
1.10 downsj 146: char *whom; /* Whom to notify if logfile changes */
1.30 millert 147: char *pidfile; /* Path to file containg pid to signal */
148: char *runcmd; /* Command to run instead of sending a signal */
1.1 deraadt 149: struct conf_entry *next; /* Linked list pointer */
150: };
151:
1.30 millert 152: struct pidinfo {
153: char *file;
154: int signal;
155: };
156:
1.1 deraadt 157: int verbose = 0; /* Print out what's going on */
158: int needroot = 1; /* Root privs are necessary */
159: int noaction = 0; /* Don't do anything, just show it */
1.10 downsj 160: int monitor = 0; /* Don't do monitoring by default */
1.1 deraadt 161: char *conf = CONF; /* Configuration file to use */
162: time_t timenow;
1.16 millert 163: #define MIN_PID 4
1.7 deraadt 164: char hostname[MAXHOSTNAMELEN]; /* hostname */
1.1 deraadt 165: char *daytime; /* timenow in human readable form */
166:
167:
1.9 downsj 168: void do_entry __P((struct conf_entry *));
169: void PRS __P((int, char **));
170: void usage __P((void));
1.28 millert 171: struct conf_entry *parse_file __P((int *));
1.9 downsj 172: char *missing_field __P((char *, char *));
1.26 millert 173: void dotrim __P((char *, int, int, int, uid_t, gid_t));
1.9 downsj 174: int log_trim __P((char *));
175: void compress_log __P((char *));
176: int sizefile __P((char *));
1.24 millert 177: int age_old_log __P((char *));
1.9 downsj 178: char *sob __P((char *));
179: char *son __P((char *));
1.10 downsj 180: int isnumberstr __P((char *));
181: void domonitor __P((char *, char *));
182: FILE *openmail __P((void));
183: void closemail __P((FILE *));
1.16 millert 184: void child_killer __P((int));
1.30 millert 185: void run_command __P((char *));
186: void send_signal __P((char *, int));
1.1 deraadt 187:
1.25 millert 188: int
189: main(argc, argv)
1.1 deraadt 190: int argc;
191: char **argv;
192: {
193: struct conf_entry *p, *q;
1.30 millert 194: struct pidinfo *pidlist, *pl;
1.28 millert 195: int status, listlen;
1.1 deraadt 196:
1.25 millert 197: PRS(argc, argv);
1.11 downsj 198: if (needroot && getuid() && geteuid())
199: errx(1, "You must be root.");
1.28 millert 200: p = q = parse_file(&listlen);
1.16 millert 201: signal(SIGCHLD, child_killer);
1.26 millert 202:
1.30 millert 203: pidlist = (struct pidinfo *)calloc(sizeof(struct pidinfo), listlen + 1);
204: if (pidlist == NULL)
1.28 millert 205: err(1, "calloc");
206:
1.26 millert 207: /* Step 1, rotate all log files */
208: while (q) {
209: do_entry(q);
210: q = q->next;
211: }
212:
1.28 millert 213: /* Step 2, make a list of unique pid files */
1.30 millert 214: for (q = p, pl = pidlist; q; ) {
1.28 millert 215: if (q->flags & CE_ROTATED) {
1.30 millert 216: struct pidinfo *pltmp;
1.28 millert 217:
1.30 millert 218: for (pltmp = pidlist; pltmp < pl; pltmp++) {
219: if ((strcmp(pltmp->file, q->pidfile) == 0 &&
220: pltmp->signal == q->signal) || (q->runcmd &&
221: strcmp(q->runcmd, pltmp->file) == 0))
1.28 millert 222: break;
1.30 millert 223: }
224: if (pltmp == pl) { /* unique entry */
225: if (q->runcmd) {
226: pl->file = q->runcmd;
227: pl->signal = -1;
228: } else {
229: pl->file = q->pidfile;
230: pl->signal = q->signal;
231: }
1.31 millert 232: pl++;
1.30 millert 233: }
1.28 millert 234: }
1.26 millert 235: q = q->next;
236: }
237:
1.30 millert 238: /* Step 3, send a signal or run a command */
239: for (pl = pidlist; pl->file; pl++) {
240: if (pl->signal == -1)
241: run_command(pl->file);
242: else
243: send_signal(pl->file, pl->signal);
244: }
1.28 millert 245: if (!noaction)
246: sleep(5);
247:
248: /* Step 4, compress the log.0 file if configured to do so and free */
1.1 deraadt 249: while (p) {
1.26 millert 250: if ((p->flags & CE_COMPACT) && (p->flags & CE_ROTATED))
251: compress_log(p->log);
252: q = p;
1.25 millert 253: p = p->next;
1.11 downsj 254: free(q);
1.1 deraadt 255: }
1.16 millert 256:
257: /* Wait for children to finish, then exit */
258: while (waitpid(-1, &status, 0) != -1)
259: ;
1.1 deraadt 260: exit(0);
261: }
262:
1.25 millert 263: void
264: do_entry(ent)
1.1 deraadt 265: struct conf_entry *ent;
266:
267: {
1.25 millert 268: int modtime, size;
1.14 millert 269:
1.19 kstailey 270: if (verbose)
271: printf("%s <%d%s>: ", ent->log, ent->numlogs,
272: (ent->flags & CE_COMPACT) ? "Z" : "");
1.1 deraadt 273: size = sizefile(ent->log);
1.24 millert 274: modtime = age_old_log(ent->log);
1.1 deraadt 275: if (size < 0) {
276: if (verbose)
277: printf("does not exist.\n");
278: } else {
279: if (verbose && (ent->size > 0))
280: printf("size (Kb): %d [%d] ", size, ent->size);
281: if (verbose && (ent->hours > 0))
282: printf(" age (hr): %d [%d] ", modtime, ent->hours);
1.10 downsj 283: if (monitor && ent->flags & CE_MONITOR)
284: domonitor(ent->log, ent->whom);
1.25 millert 285: if (!monitor && (((ent->size > 0) && (size >= ent->size)) ||
1.1 deraadt 286: ((ent->hours > 0) && ((modtime >= ent->hours)
1.25 millert 287: || (modtime < 0))))) {
1.1 deraadt 288: if (verbose)
289: printf("--> trimming log....\n");
1.19 kstailey 290: if (noaction && !verbose)
291: printf("%s <%d%s>: ", ent->log, ent->numlogs,
292: (ent->flags & CE_COMPACT) ? "Z" : "");
1.1 deraadt 293: dotrim(ent->log, ent->numlogs, ent->flags,
1.26 millert 294: ent->permissions, ent->uid, ent->gid);
295: ent->flags |= CE_ROTATED;
1.25 millert 296: } else if (verbose)
297: printf("--> skipping\n");
1.1 deraadt 298: }
299: }
300:
1.30 millert 301: /* Run the specified command */
302: void
303: run_command(cmd)
304: char *cmd;
305: {
306:
307: if (noaction)
308: (void)printf("run %s\n", cmd);
309: else
310: system(cmd);
311: }
312:
313: /* Send a signal to the pid specified by pidfile */
1.26 millert 314: void
1.30 millert 315: send_signal(pidfile, signal)
1.26 millert 316: char *pidfile;
1.30 millert 317: int signal;
1.26 millert 318: {
319: FILE *f;
320: char line[BUFSIZ];
321: pid_t pid = 0;
322:
323: if ((f = fopen(pidfile, "r")) == NULL) {
324: warn("can't open %s", pidfile);
325: return;
326: }
327:
328: if (fgets(line, sizeof(line), f))
329: pid = atoi(line);
330: (void)fclose(f);
331:
332: if (noaction)
1.30 millert 333: (void)printf("kill -%s %d\n", sys_signame[signal], pid);
1.26 millert 334: else if (pid == 0)
335: warnx("empty pid file: %s", pidfile);
336: else if (pid < MIN_PID)
337: warnx("preposterous process number: %d", pid);
1.30 millert 338: else if (kill(pid, signal))
339: warnx("warning - could not send SIG%s to daemon",
340: sys_signame[signal]);
1.26 millert 341: }
342:
1.25 millert 343: void
344: PRS(argc, argv)
1.1 deraadt 345: int argc;
346: char **argv;
347: {
348: int c;
349: char *p;
350:
1.12 kstailey 351: timenow = time(NULL);
1.1 deraadt 352: daytime = ctime(&timenow) + 4;
1.2 deraadt 353: daytime[15] = '\0';
1.1 deraadt 354:
355: /* Let's get our hostname */
1.25 millert 356: (void)gethostname(hostname, sizeof(hostname));
1.1 deraadt 357:
358: /* Truncate domain */
1.9 downsj 359: p = strchr(hostname, '.');
360: if (p)
1.1 deraadt 361: *p = '\0';
362:
363: optind = 1; /* Start options parsing */
1.25 millert 364: while ((c = getopt(argc, argv, "nrvmf:t:")) != -1) {
1.1 deraadt 365: switch (c) {
366: case 'n':
367: noaction++; /* This implies needroot as off */
368: /* fall through */
369: case 'r':
370: needroot = 0;
371: break;
372: case 'v':
373: verbose++;
374: break;
375: case 'f':
376: conf = optarg;
377: break;
1.10 downsj 378: case 'm':
379: monitor++;
380: break;
1.1 deraadt 381: default:
382: usage();
383: }
384: }
1.9 downsj 385: }
1.1 deraadt 386:
1.25 millert 387: void
388: usage()
1.1 deraadt 389: {
1.25 millert 390: extern const char *__progname;
391:
392: (void)fprintf(stderr, "usage: %s [-nrvm] [-f config-file]\n",
393: __progname);
1.14 millert 394: exit(1);
1.1 deraadt 395: }
396:
397: /* Parse a configuration file and return a linked list of all the logs
398: * to process
399: */
1.25 millert 400: struct conf_entry *
1.28 millert 401: parse_file(nentries)
402: int *nentries;
1.1 deraadt 403: {
404: FILE *f;
405: char line[BUFSIZ], *parse, *q;
1.25 millert 406: char *errline, *group, *tmp;
1.1 deraadt 407: struct conf_entry *first = NULL;
408: struct conf_entry *working;
409: struct passwd *pass;
410: struct group *grp;
411:
1.25 millert 412: if (strcmp(conf, "-") == 0)
1.1 deraadt 413: f = stdin;
1.25 millert 414: else {
415: if ((f = fopen(conf, "r")) == NULL)
416: err(1, "can't open %s", conf);
417: }
1.11 downsj 418:
1.28 millert 419: *nentries = 0;
1.25 millert 420: while (fgets(line, sizeof(line), f)) {
421: if ((line[0] == '\n') || (line[0] == '#'))
1.1 deraadt 422: continue;
423: errline = strdup(line);
1.11 downsj 424: if (errline == NULL)
425: err(1, "strdup");
1.28 millert 426: (*nentries)++;
1.1 deraadt 427: if (!first) {
428: working = (struct conf_entry *) malloc(sizeof(struct conf_entry));
1.11 downsj 429: if (working == NULL)
430: err(1, "malloc");
1.1 deraadt 431: first = working;
432: } else {
433: working->next = (struct conf_entry *) malloc(sizeof(struct conf_entry));
1.11 downsj 434: if (working->next == NULL)
435: err(1, "malloc");
1.1 deraadt 436: working = working->next;
437: }
438:
1.25 millert 439: q = parse = missing_field(sob(line), errline);
1.1 deraadt 440: *(parse = son(line)) = '\0';
441: working->log = strdup(q);
1.11 downsj 442: if (working->log == NULL)
443: err(1, "strdup");
1.1 deraadt 444:
1.25 millert 445: q = parse = missing_field(sob(++parse), errline);
1.1 deraadt 446: *(parse = son(parse)) = '\0';
1.25 millert 447: if ((group = strchr(q, '.')) != NULL) {
448: *group++ = '\0';
449: if (*q) {
450: if (!(isnumberstr(q))) {
451: if ((pass = getpwnam(q)) == NULL)
452: errx(1, "Error in config file; unknown user: %s", q);
453: working->uid = pass->pw_uid;
454: } else
455: working->uid = atoi(q);
456: } else
457: working->uid = NONE;
458:
459: q = group;
460: if (*q) {
461: if (!(isnumberstr(q))) {
462: if ((grp = getgrnam(q)) == NULL)
463: errx(1, "Error in config file; unknown group: %s", q);
464: working->gid = grp->gr_gid;
465: } else
466: working->gid = atoi(q);
467: } else
468: working->gid = NONE;
469:
470: q = parse = missing_field(sob(++parse), errline);
471: *(parse = son(parse)) = '\0';
472: } else
473: working->uid = working->gid = NONE;
1.1 deraadt 474:
1.25 millert 475: if (!sscanf(q, "%o", &working->permissions))
1.11 downsj 476: errx(1, "Error in config file; bad permissions: %s", q);
1.1 deraadt 477:
1.25 millert 478: q = parse = missing_field(sob(++parse), errline);
1.1 deraadt 479: *(parse = son(parse)) = '\0';
1.25 millert 480: if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1.11 downsj 481: errx(1, "Error in config file; bad number: %s", q);
1.1 deraadt 482:
1.25 millert 483: q = parse = missing_field(sob(++parse), errline);
1.1 deraadt 484: *(parse = son(parse)) = '\0';
485: if (isdigit(*q))
486: working->size = atoi(q);
487: else
488: working->size = -1;
489:
1.25 millert 490: q = parse = missing_field(sob(++parse), errline);
1.1 deraadt 491: *(parse = son(parse)) = '\0';
492: if (isdigit(*q))
493: working->hours = atoi(q);
494: else
495: working->hours = -1;
496:
497: working->flags = 0;
1.32 ! millert 498: q = sob(++parse); /* Optional field */
! 499: if (*q == 'Z' || *q == 'z' || *q == 'B' || *q == 'b' ||
! 500: *q == 'M' || *q == 'm') {
! 501: *(parse = son(q)) = '\0';
! 502: while (*q) {
! 503: switch (*q) {
! 504: case 'Z':
! 505: case 'z':
! 506: working->flags |= CE_COMPACT;
! 507: break;
! 508: case 'B':
! 509: case 'b':
! 510: working->flags |= CE_BINARY;
! 511: break;
! 512: case 'M':
! 513: case 'm':
! 514: working->flags |= CE_MONITOR;
! 515: break;
! 516: default:
! 517: errx(1, "Illegal flag in config file: %c", *q);
! 518: break;
! 519: }
! 520: q++;
! 521: }
! 522: } else
! 523: parse--; /* no flags so undo */
1.10 downsj 524:
525: working->whom = NULL;
526: if (working->flags & CE_MONITOR) { /* Optional field */
527: q = parse = sob(++parse);
528: *(parse = son(parse)) = '\0';
529:
530: working->whom = strdup(q);
1.11 downsj 531: if (working->log == NULL)
532: err(1, "strdup");
1.10 downsj 533: }
1.14 millert 534:
535: working->pidfile = PIDFILE;
1.30 millert 536: working->signal = SIGHUP;
537: working->runcmd = NULL;
538: for (;;) {
539: q = parse = sob(++parse); /* Optional field */
540: if (q == NULL || *q == '\0')
541: break;
542: if (*q == '/') {
543: *(parse = son(parse)) = '\0';
544: if (strlen(q) >= MAXPATHLEN)
545: errx(1, "%s: pathname too long", q);
546: working->pidfile = strdup(q);
547: if (working->pidfile == NULL)
548: err(1, "strdup");
549: } else if (*q == '"' && (tmp = strchr(q + 1, '"'))) {
550: *(parse = tmp) = '\0';
551: working->runcmd = strdup(++q);
552: if (working->runcmd == NULL)
553: err(1, "strdup");
554: } else if (strncmp(q, "SIG", 3) == 0) {
555: int i;
556:
557: *(parse = son(parse)) = '\0';
558: for (i = 1; i < NSIG; i++) {
559: if (!strcmp(sys_signame[i], q + 3)) {
560: working->signal = i;
561: break;
562: }
563: }
564: if (i == NSIG)
565: errx(1, "unknown signal: %s", q);
566: } else
567: errx(1, "unrecognized field: %s", q);
1.14 millert 568: }
1.25 millert 569:
570: /* Make sure we can't oflow MAXPATHLEN */
571: if (asprintf(&tmp, "%s.%d%s", working->log, working->numlogs,
572: COMPRESS_POSTFIX) >= MAXPATHLEN)
573: errx(1, "%s: pathname too long", working->log);
1.1 deraadt 574:
1.25 millert 575: free(tmp);
1.1 deraadt 576: free(errline);
577: }
578: if (working)
1.12 kstailey 579: working->next = NULL;
1.25 millert 580: (void)fclose(f);
1.1 deraadt 581: return(first);
582: }
583:
1.25 millert 584: char *
585: missing_field(p, errline)
586: char *p;
587: char *errline;
1.1 deraadt 588: {
589: if (!p || !*p) {
1.14 millert 590: warnx("Missing field in config file line:");
1.11 downsj 591: fputs(errline, stderr);
1.1 deraadt 592: exit(1);
593: }
594: return(p);
595: }
596:
1.25 millert 597: void
1.26 millert 598: dotrim(log, numdays, flags, perm, owner_uid, group_gid)
1.1 deraadt 599: char *log;
600: int numdays;
601: int flags;
602: int perm;
1.25 millert 603: uid_t owner_uid;
604: gid_t group_gid;
1.1 deraadt 605: {
1.7 deraadt 606: char file1[MAXPATHLEN], file2[MAXPATHLEN];
607: char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1.1 deraadt 608: int fd;
609: struct stat st;
1.6 tholo 610: int days = numdays;
1.1 deraadt 611:
1.25 millert 612: /* Remove oldest log (may not exist) */
613: (void)sprintf(file1, "%s.%d", log, numdays);
614: (void)strcpy(zfile1, file1);
615: (void)strcat(zfile1, COMPRESS_POSTFIX);
1.1 deraadt 616: if (noaction) {
1.26 millert 617: printf("rm -f %s %s\n", file1, zfile1);
1.1 deraadt 618: } else {
1.25 millert 619: (void)unlink(file1);
620: (void)unlink(zfile1);
1.1 deraadt 621: }
622:
623: /* Move down log files */
624: while (numdays--) {
1.25 millert 625: (void)strcpy(file2, file1);
626: (void)sprintf(file1, "%s.%d", log, numdays);
627: (void)strcpy(zfile1, file1);
628: (void)strcpy(zfile2, file2);
1.1 deraadt 629: if (lstat(file1, &st)) {
1.25 millert 630: (void)strcat(zfile1, COMPRESS_POSTFIX);
631: (void)strcat(zfile2, COMPRESS_POSTFIX);
632: if (lstat(zfile1, &st))
633: continue;
1.1 deraadt 634: }
635: if (noaction) {
1.25 millert 636: printf("mv %s %s\n", zfile1, zfile2);
1.1 deraadt 637: printf("chmod %o %s\n", perm, zfile2);
1.25 millert 638: printf("chown %d:%d %s\n",
1.1 deraadt 639: owner_uid, group_gid, zfile2);
640: } else {
1.25 millert 641: if (rename(zfile1, zfile2))
642: warn("can't mv %s to %s", zfile1, zfile2);
643: if (chmod(zfile2, perm))
644: warn("can't chmod %s", zfile2);
645: if (chown(zfile2, owner_uid, group_gid))
646: warn("can't chown %s", zfile2);
1.1 deraadt 647: }
648: }
649: if (!noaction && !(flags & CE_BINARY))
1.25 millert 650: (void)log_trim(log); /* Report the trimming to the old log */
1.1 deraadt 651:
1.26 millert 652: (void)snprintf(file2, sizeof(file2), "%s.XXXXXXXXXX", log);
653: if (noaction) {
654: printf("Create new log file...\n");
655: } else {
656: if ((fd = mkstemp(file2)) < 0)
657: err(1, "can't start '%s' log", file2);
658: if (fchown(fd, owner_uid, group_gid))
659: err(1, "can't chown '%s' log file", file2);
660: if (fchmod(fd, perm))
661: err(1, "can't chmod '%s' log file", file2);
662: (void)close(fd);
663: /* Add status message */
664: if (!(flags & CE_BINARY) && log_trim(file2))
665: err(1, "can't add status message to log '%s'", file2);
666: }
667:
1.6 tholo 668: if (days == 0) {
1.5 deraadt 669: if (noaction)
1.25 millert 670: printf("rm %s\n", log);
671: else if (unlink(log))
672: warn("can't rm %s", log);
1.5 deraadt 673: } else {
674: if (noaction)
1.25 millert 675: printf("mv %s to %s\n", log, file1);
676: else if (rename(log, file1))
677: warn("can't to mv %s to %s", log, file1);
1.5 deraadt 678: }
679:
1.26 millert 680: /* Now move the new log file into place */
681: if (noaction)
682: printf("mv %s to %s\n", file2, log);
683: else if (rename(file2, log))
684: warn("can't to mv %s to %s", file2, log);
1.1 deraadt 685: }
686:
687: /* Log the fact that the logs were turned over */
1.25 millert 688: int
689: log_trim(log)
1.17 deraadt 690: char *log;
1.1 deraadt 691: {
692: FILE *f;
1.25 millert 693:
694: if ((f = fopen(log, "a")) == NULL)
1.1 deraadt 695: return(-1);
1.25 millert 696: (void)fprintf(f, "%s %s newsyslog[%d]: logfile turned over\n",
697: daytime, hostname, getpid());
1.24 millert 698: if (fclose(f) == EOF)
1.11 downsj 699: err(1, "log_trim: fclose");
1.1 deraadt 700: return(0);
701: }
702:
1.16 millert 703: /* Fork off compress or gzip to compress the old log file */
1.25 millert 704: void
705: compress_log(log)
1.1 deraadt 706: char *log;
707: {
1.25 millert 708: pid_t pid;
1.27 millert 709: char *base;
1.7 deraadt 710: char tmp[MAXPATHLEN];
1.1 deraadt 711:
1.27 millert 712: if ((base = strrchr(COMPRESS, '/')) == NULL)
713: base = COMPRESS;
714: else
715: base++;
716: if (noaction) {
717: printf("%s %s.0\n", base, log);
718: return;
719: }
1.1 deraadt 720: pid = fork();
1.25 millert 721: (void)sprintf(tmp, "%s.0", log);
1.1 deraadt 722: if (pid < 0) {
1.11 downsj 723: err(1, "fork");
1.1 deraadt 724: } else if (!pid) {
1.27 millert 725: (void)execl(COMPRESS, base, "-f", tmp, 0);
1.16 millert 726: warn(COMPRESS);
727: _exit(1);
1.1 deraadt 728: }
729: }
730:
731: /* Return size in kilobytes of a file */
1.25 millert 732: int
733: sizefile(file)
1.1 deraadt 734: char *file;
735: {
736: struct stat sb;
737:
1.25 millert 738: if (stat(file, &sb) < 0)
1.1 deraadt 739: return(-1);
1.25 millert 740: return(sb.st_blocks / (1024.0 / DEV_BSIZE));
1.1 deraadt 741: }
742:
1.25 millert 743: /* Return the age (in hours) of old log file (file.0), or -1 if none */
744: int
745: age_old_log(file)
1.1 deraadt 746: char *file;
747: {
748: struct stat sb;
1.7 deraadt 749: char tmp[MAXPATHLEN];
1.1 deraadt 750:
1.25 millert 751: (void)strcpy(tmp, file);
752: if (stat(strcat(tmp, ".0"), &sb) < 0)
753: if (stat(strcat(tmp, COMPRESS_POSTFIX), &sb) < 0)
1.1 deraadt 754: return(-1);
1.24 millert 755: return( (int) (timenow - sb.st_mtime + 1800) / 3600);
1.1 deraadt 756: }
757:
758: /* Skip Over Blanks */
1.25 millert 759: char *
760: sob(p)
1.1 deraadt 761: register char *p;
762: {
763: while (p && *p && isspace(*p))
764: p++;
765: return(p);
766: }
767:
768: /* Skip Over Non-Blanks */
1.25 millert 769: char *
770: son(p)
1.1 deraadt 771: register char *p;
772: {
773: while (p && *p && !isspace(*p))
774: p++;
775: return(p);
776: }
777:
778: /* Check if string is actually a number */
1.25 millert 779: int
780: isnumberstr(string)
1.10 downsj 781: char *string;
1.1 deraadt 782: {
1.25 millert 783: while (*string) {
1.9 downsj 784: if (!isdigit(*string++))
785: return(0);
1.1 deraadt 786: }
787: return(1);
1.10 downsj 788: }
789:
1.25 millert 790: void
791: domonitor(log, whom)
1.10 downsj 792: char *log, *whom;
793: {
794: struct stat sb, tsb;
795: char *fname, *flog, *p, *rb = NULL;
796: FILE *fp;
797: off_t osize;
798: int rd;
799:
800: if (stat(log, &sb) < 0)
801: return;
802:
803: flog = strdup(log);
1.11 downsj 804: if (flog == NULL)
805: err(1, "strdup");
806:
1.10 downsj 807: for (p = flog; *p != '\0'; p++) {
808: if (*p == '/')
809: *p = '_';
810: }
1.20 fgsch 811: fname = (char *) malloc(sizeof(STATS_DIR) + strlen(flog) + 16);
1.11 downsj 812: if (fname == NULL)
813: err(1, "malloc");
814:
1.10 downsj 815: sprintf(fname, "%s/newsyslog.%s.size", STATS_DIR, flog);
816:
817: /* ..if it doesn't exist, simply record the current size. */
818: if ((sb.st_size == 0) || stat(fname, &tsb) < 0)
819: goto update;
820:
821: fp = fopen(fname, "r");
822: if (fp == NULL) {
1.11 downsj 823: warn(fname);
1.10 downsj 824: goto cleanup;
825: }
826: #ifdef QUAD_OFF_T
827: if (fscanf(fp, "%qd\n", &osize) != 1) {
828: #else
829: if (fscanf(fp, "%ld\n", &osize) != 1) {
830: #endif /* QUAD_OFF_T */
831: fclose(fp);
832: goto update;
833: }
834:
835: fclose(fp);
836:
837: /* If the file is smaller, mark the entire thing as changed. */
838: if (sb.st_size < osize)
839: osize = 0;
840:
841: /* Now see if current size is larger. */
842: if (sb.st_size > osize) {
843: rb = (char *) malloc(sb.st_size - osize);
1.11 downsj 844: if (rb == NULL)
845: err(1, "malloc");
1.10 downsj 846:
847: /* Open logfile, seek. */
848: fp = fopen(log, "r");
849: if (fp == NULL) {
1.11 downsj 850: warn(log);
1.10 downsj 851: goto cleanup;
852: }
853: fseek(fp, osize, SEEK_SET);
854: rd = fread(rb, 1, sb.st_size - osize, fp);
855: if (rd < 1) {
1.11 downsj 856: warn("fread");
1.10 downsj 857: fclose(fp);
858: goto cleanup;
859: }
860:
861: /* Send message. */
862: fclose(fp);
863:
864: fp = openmail();
865: if (fp == NULL) {
1.11 downsj 866: warn("openmail");
1.10 downsj 867: goto cleanup;
868: }
869: fprintf(fp, "To: %s\nSubject: LOGFILE NOTIFICATION: %s\n\n\n",
870: whom, log);
871: fwrite(rb, 1, rd, fp);
872: fputs("\n\n", fp);
873:
874: closemail(fp);
875: }
876: update:
877: /* Reopen for writing and update file. */
878: fp = fopen(fname, "w");
879: if (fp == NULL) {
1.11 downsj 880: warn(fname);
1.10 downsj 881: goto cleanup;
882: }
883: #ifdef QUAD_OFF_T
884: fprintf(fp, "%qd\n", sb.st_size);
885: #else
886: fprintf(fp, "%ld\n", sb.st_size);
887: #endif /* QUAD_OFF_T */
888: fclose(fp);
889:
890: cleanup:
891: free(flog);
892: free(fname);
893: if (rb != NULL)
894: free(rb);
895: }
896:
1.25 millert 897: FILE *
898: openmail()
1.10 downsj 899: {
900: char *cmdbuf;
901: FILE *ret;
902:
1.20 fgsch 903: cmdbuf = (char *) malloc(sizeof(SENDMAIL) + 3);
1.10 downsj 904: if (cmdbuf == NULL)
905: return(NULL);
906:
907: sprintf(cmdbuf, "%s -t", SENDMAIL);
908: ret = popen(cmdbuf, "w");
909:
910: free(cmdbuf);
911: return(ret);
912: }
913:
1.25 millert 914: void
915: closemail(pfp)
1.10 downsj 916: FILE *pfp;
917: {
918: pclose(pfp);
1.16 millert 919: }
920:
1.25 millert 921: void
922: child_killer(signum)
1.16 millert 923: int signum;
924: {
925: int status;
926:
927: while (waitpid(-1, &status, WNOHANG) > 0)
928: ;
1.1 deraadt 929: }
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