2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <pop@noos.fr>, 1999-2000
6 * Stelian Pop <pop@noos.fr> - AlcĂ´ve <www.alcove.fr>, 2000
10 * Copyright (c) 1980, 1988, 1993
11 * The Regents of the University of California. All rights reserved.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed by the University of
24 * California, Berkeley and its contributors.
25 * 4. Neither the name of the University nor the names of its contributors
26 * may be used to endorse or promote products derived from this software
27 * without specific prior written permission.
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 static const char rcsid[] =
44 "$Id: optr.c,v 1.23 2001/06/18 10:58:28 stelian Exp $";
48 #include <sys/param.h>
64 #ifdef HAVE_EXT2FS_EXT2_FS_H
65 #include <ext2fs/ext2_fs.h>
67 #include <linux/ext2_fs.h>
69 #include <ext2fs/ext2fs.h>
70 #include <bsdcompat.h>
76 #include "pathnames.h"
79 static void alarmcatch __P((int));
80 int datesort __P((const void *, const void *));
81 static void sendmes __P((const char *, const char *));
83 /* List of filesystem types that we can dump (same ext2 on-disk format) */
84 static char *fstypes[] = { "ext2", "ext3", "InterMezzo", NULL };
87 * Query the operator; This previously-fascist piece of code
88 * no longer requires an exact response.
89 * It is intended to protect dump aborting by inquisitive
90 * people banging on the console terminal to see what is
91 * happening which might cause dump to croak, destroying
92 * a large number of hours of work.
94 * Every 2 minutes we reprint the message, alerting others
95 * that dump needs attention.
98 static const char *attnmessage; /* attention message */
101 query(const char *question)
103 char replybuffer[64];
106 time_t firstprompt, when_answered;
108 firstprompt = time(NULL);
110 if ((mytty = fopen(_PATH_TTY, "r")) == NULL)
111 quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno));
112 attnmessage = question;
118 if (fgets(replybuffer, 63, mytty) == NULL) {
120 if (++errcount > 30) /* XXX ugly */
121 quit("excessive operator query failures\n");
122 } else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') {
124 } else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') {
127 (void) fprintf(stderr,
128 " DUMP: \"Yes\" or \"No\"?\n");
129 (void) fprintf(stderr,
130 " DUMP: %s: (\"yes\" or \"no\") ", question);
135 * Turn off the alarm, and reset the signal to trap out..
138 if (signal(SIGALRM, sig) == SIG_IGN)
139 signal(SIGALRM, SIG_IGN);
140 (void) fclose(mytty);
141 when_answered = time(NULL);
143 * Adjust the base for time estimates to ignore time we spent waiting
144 * for operator input.
146 if (tstart_writing != 0)
147 tstart_writing += (when_answered - firstprompt);
151 char lastmsg[BUFSIZ];
154 * Alert the console operator, and enable the alarm clock to
155 * sleep for 2 minutes in case nobody comes to satisfy dump
158 alarmcatch(int signo)
160 int save_errno = errno;
163 (void) fprintf(stderr,
164 " DUMP: %s: (\"yes\" or \"no\") ",
171 broadcast(""); /* just print last msg */
173 (void) fprintf(stderr," DUMP: %s: (\"yes\" or \"no\") ",
176 signal(SIGALRM, alarmcatch);
183 * Here if an inquisitive operator interrupts the dump program
188 msg("Interrupt received.\n");
189 if (query("Do you want to abort dump?"))
194 * The following variables and routines manage alerting
195 * operators to the status of dump.
196 * This works much like wall(1) does.
201 * Get the names from the group entry "operator" to notify.
206 if (!notify) /*not going to notify*/
208 gp = getgrnam(OPGRENT);
211 msg("No group entry for %s.\n", OPGRENT);
217 struct tm *localclock;
220 * We fork a child to do the actual broadcasting, so
221 * that the process control groups are not messed up
224 broadcast(const char *message)
232 if (!notify || gp == NULL)
235 switch (pid = fork()) {
241 while (wait(&s) != pid)
247 localclock = localtime(&clock);
249 if ((f_utmp = fopen(_PATH_UTMP, "r")) == NULL) {
250 msg("Cannot open %s: %s\n", _PATH_UTMP, strerror(errno));
254 while (!feof(f_utmp)) {
255 if (fread((char *) &utmp, sizeof (struct utmp), 1, f_utmp) != 1)
257 if (utmp.ut_name[0] == 0)
259 for (np = gp->gr_mem; *np; np++) {
260 if (strncmp(*np, utmp.ut_name, sizeof(utmp.ut_name)) != 0)
263 * Do not send messages to operators on dialups
265 if (strncmp(utmp.ut_line, DIALUP, strlen(DIALUP)) == 0)
268 msg("Message to %s at %s\n", *np, utmp.ut_line);
270 sendmes(utmp.ut_line, message);
273 (void) fclose(f_utmp);
274 Exit(0); /* the wait in this same routine will catch this */
279 sendmes(const char *tty, const char *message)
281 char t[MAXPATHLEN], buf[BUFSIZ];
282 register const char *cp;
286 (void) strcpy(t, _PATH_DEV);
287 (void) strncat(t, tty, sizeof t - strlen(_PATH_DEV) - 1);
289 if ((f_tty = fopen(t, "w")) != NULL) {
291 (void) fprintf(f_tty,
293 \7\7\7Message from the dump program to all operators at %d:%02d ...\r\n\n\
294 DUMP: NEEDS ATTENTION: ",
295 localclock->tm_hour, localclock->tm_min);
296 for (cp = lastmsg; ; cp++) {
300 if (!(cp && *cp != '\0'))
307 (void) putc('\r', f_tty);
308 (void) putc(*cp, f_tty);
310 (void) fclose(f_tty);
315 * print out an estimate of the amount of time left to do the dump
318 time_t tschedule = 0;
323 time_t tnow = time(NULL);
325 if (tnow >= tschedule) {
326 char *buf = mktimeest(tnow);
327 tschedule = tnow + 300;
329 fprintf(stderr, " DUMP: ");
330 fwrite(buf, strlen(buf), 1, stderr);
338 msg(const char *fmt, ...)
347 (void) fprintf(stderr," DUMP: ");
349 (void) fprintf(stderr, "pid=%d ", getpid());
356 (void) vfprintf(stderr, fmt, ap);
358 (void) fflush(stdout);
359 (void) fflush(stderr);
365 (void) vsnprintf(lastmsg, sizeof(lastmsg), fmt, ap);
371 msgtail(const char *fmt, ...)
373 msgtail(fmt, va_alist)
384 (void) vfprintf(stderr, fmt, ap);
390 quit(const char *fmt, ...)
399 (void) fprintf(stderr," DUMP: ");
401 (void) fprintf(stderr, "pid=%d ", getpid());
408 (void) vfprintf(stderr, fmt, ap);
410 (void) fflush(stdout);
411 (void) fflush(stderr);
416 * Tell the operator what has to be done;
417 * we don't actually do it
420 static struct fstab *
421 allocfsent(struct fstab *fs)
423 register struct fstab *new;
425 new = (struct fstab *)malloc(sizeof (*fs));
427 quit("%s\n", strerror(errno));
428 if (strlen(fs->fs_file) > 1 && fs->fs_file[strlen(fs->fs_file) - 1] == '/')
429 fs->fs_file[strlen(fs->fs_file) - 1] = '\0';
430 if ((new->fs_file = strdup(fs->fs_file)) == NULL ||
431 (new->fs_type = strdup(fs->fs_type)) == NULL ||
432 (new->fs_vfstype = strdup(fs->fs_vfstype)) == NULL ||
433 (new->fs_spec = strdup(fs->fs_spec)) == NULL)
434 quit("%s\n", strerror(errno));
435 new->fs_passno = fs->fs_passno;
436 new->fs_freq = fs->fs_freq;
441 struct pfstab *pf_next;
442 struct dumpdates *pf_dd;
443 struct fstab *pf_fstab;
446 static struct pfstab *table;
453 struct pfstab *pfold = NULL;
455 if (setfsent() == 0) {
456 msg("Can't open %s for dump table information: %s\n",
457 _PATH_FSTAB, strerror(errno));
460 while ((fs = getfsent()) != NULL) {
461 if (strcmp(fs->fs_type, FSTAB_RW) &&
462 strcmp(fs->fs_type, FSTAB_RO) &&
463 strcmp(fs->fs_type, FSTAB_RQ))
467 if ((pf = (struct pfstab *)malloc(sizeof (*pf))) == NULL)
468 quit("%s\n", strerror(errno));
472 /* keep table in /etc/fstab order for use with -w and -W */
484 * Search in the fstab for a file name.
485 * This file name can be either the special or the path file name.
487 * The entries in the fstab are the BLOCK special names, not the
488 * character special names.
489 * The caller of fstabsearch assures that the character device
490 * is dumped (that is much faster)
492 * The file name can omit the leading '/'.
495 fstabsearch(const char *key)
497 register struct pfstab *pf;
498 register struct fstab *fs;
501 for (pf = table; pf != NULL; pf = pf->pf_next) {
503 if (strcmp(fs->fs_file, key) == 0 ||
504 strcmp(fs->fs_spec, key) == 0)
506 rn = rawname(fs->fs_spec);
507 if (rn != NULL && strcmp(rn, key) == 0)
510 if (*fs->fs_spec == '/' &&
511 strcmp(fs->fs_spec + 1, key) == 0)
513 if (*fs->fs_file == '/' &&
514 strcmp(fs->fs_file + 1, key) == 0)
523 fstabsearchdir(const char *key, char *directory)
525 register struct pfstab *pf;
526 register struct fstab *fs;
527 register struct fstab *found_fs = NULL;
528 unsigned int size = 0;
531 if (stat(key, &buf) == 0 && S_ISBLK(buf.st_mode))
534 for (pf = table; pf != NULL; pf = pf->pf_next) {
536 if (strlen(fs->fs_file) > size &&
537 strlen(key) > strlen(fs->fs_file) + 1 &&
538 strncmp(fs->fs_file, key, strlen(fs->fs_file)) == 0 &&
539 (key[strlen(fs->fs_file)] == '/' ||
540 fs->fs_file[strlen(fs->fs_file) - 1] == '/')) {
542 size = strlen(fs->fs_file);
545 if (found_fs != NULL) {
547 * Ok, we have found a fstab entry which matches the argument
548 * We have to split the argument name into:
549 * - a device name (from the fstab entry)
550 * - a directory name on this device
552 strcpy(directory, key + size);
559 print_wmsg(char arg, int dumpme, const char *dev, int level,
560 const char *mtpt, time_t ddate)
566 date = (char *)ctime(&ddate);
567 d = strchr(date, '\n');
571 if (!dumpme && arg == 'w')
574 (void) printf("%c %8s\t(%6s) Last dump: ",
575 dumpme && (arg != 'w') ? '>' : ' ',
580 printf("Level %c, Date %s\n",
587 * Tell the operator what to do
590 lastdump(char arg) /* w ==> just what to do; W ==> most recent dumps */
596 getfstab(); /* /etc/fstab input */
597 initdumptimes(0); /* dumpdates input */
598 if (ddatev == NULL && table == NULL) {
599 (void) printf("No %s or %s file found\n",
600 _PATH_FSTAB, _PATH_DUMPDATES);
605 (void) printf("Dump these file systems:\n");
607 (void) printf("Last dump(s) done (Dump '>' file systems):\n");
609 if (ddatev != NULL) {
610 struct dumpdates *dtwalk = NULL;
614 qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort);
617 ITITERATE(i, dtwalk) {
619 if (strncmp(lastname, dtwalk->dd_name,
620 sizeof(dtwalk->dd_name)) == 0)
622 lastname = dtwalk->dd_name;
623 if ((dt = dtwalk->dd_fstab) != NULL) {
624 /* Overload fs_freq as dump level and
625 * fs_passno as date, because we can't
626 * change struct fstab format.
627 * A negative fs_freq means this
628 * filesystem needs to be dumped.
630 dt->fs_passno = dtwalk->dd_ddate;
631 if (dt->fs_freq > 0 && (dtwalk->dd_ddate <
632 tnow - (dt->fs_freq * 86400)))
633 dt->fs_freq = -dtwalk->dd_level - 1;
635 dt->fs_freq = dtwalk->dd_level + 1;
641 /* print in /etc/fstab order only those filesystem types we can dump */
642 for (pf = table; pf != NULL; pf = pf->pf_next) {
643 struct fstab *dt = pf->pf_fstab;
646 for (type = fstypes; *type != NULL; type++) {
647 if (strncmp(dt->fs_vfstype, *type,
648 sizeof(dt->fs_vfstype)) == 0) {
649 const char *disk = get_device_name(dt->fs_spec);
650 print_wmsg(arg, dt->fs_freq < 0,
651 disk ? disk : dt->fs_spec,
652 dt->fs_freq < 0 ? -dt->fs_freq - 1 : dt->fs_freq - 1,
659 /* print in /etc/dumpdates order if not in /etc/fstab */
660 if (ddatev != NULL) {
661 struct dumpdates *dtwalk = NULL;
666 ITITERATE(i, dtwalk) {
667 if (strncmp(lastname, dtwalk->dd_name,
668 sizeof(dtwalk->dd_name)) == 0 ||
669 dtwalk->dd_fstab != NULL)
671 lastname = dtwalk->dd_name;
672 print_wmsg(arg, 0, dtwalk->dd_name,
673 dtwalk->dd_level, NULL, dtwalk->dd_ddate);
679 datesort(const void *a1, const void *a2)
681 struct dumpdates *d1 = *(struct dumpdates **)a1;
682 struct dumpdates *d2 = *(struct dumpdates **)a2;
685 diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
687 return (d2->dd_ddate - d1->dd_ddate);