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 <stelian@popies.net>, 1999-2000
6 * Stelian Pop <stelian@popies.net> - AlcĂ´ve <www.alcove.com>, 2000-2002
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 1.32 2002/07/19 14:57:39 stelian Exp $";
48 #include <sys/param.h>
65 #ifdef HAVE_EXT2FS_EXT2_FS_H
66 #include <ext2fs/ext2_fs.h>
68 #include <linux/ext2_fs.h>
70 #include <ext2fs/ext2fs.h>
71 #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;
109 msg("%s - forced abort\n", question);
114 firstprompt = time(NULL);
116 if ((mytty = fopen(_PATH_TTY, "r")) == NULL)
117 quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno));
118 attnmessage = question;
124 if (fgets(replybuffer, 63, mytty) == NULL) {
126 if (++errcount > 30) /* XXX ugly */
127 quit("excessive operator query failures\n");
128 } else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') {
130 } else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') {
133 (void) fprintf(stderr,
134 " DUMP: \"Yes\" or \"No\"?\n");
135 (void) fprintf(stderr,
136 " DUMP: %s: (\"yes\" or \"no\") ", question);
141 * Turn off the alarm, and reset the signal to trap out..
144 if (signal(SIGALRM, sig) == SIG_IGN)
145 signal(SIGALRM, SIG_IGN);
146 (void) fclose(mytty);
147 when_answered = time(NULL);
149 * Adjust the base for time estimates to ignore time we spent waiting
150 * for operator input.
152 if (tstart_writing != 0)
153 tstart_writing += (when_answered - firstprompt);
157 char lastmsg[BUFSIZ];
160 * Alert the console operator, and enable the alarm clock to
161 * sleep for 2 minutes in case nobody comes to satisfy dump
164 alarmcatch(UNUSED(int signo))
166 int save_errno = errno;
169 (void) fprintf(stderr,
170 " DUMP: %s: (\"yes\" or \"no\") ",
177 broadcast(""); /* just print last msg */
179 (void) fprintf(stderr," DUMP: %s: (\"yes\" or \"no\") ",
182 signal(SIGALRM, alarmcatch);
189 * Here if an inquisitive operator interrupts the dump program
192 interrupt(UNUSED(int signo))
194 msg("Interrupt received.\n");
195 if (query("Do you want to abort dump?"))
200 * The following variables and routines manage alerting
201 * operators to the status of dump.
202 * This works much like wall(1) does.
207 * Get the names from the group entry "operator" to notify.
212 if (!notify) /*not going to notify*/
214 gp = getgrnam(OPGRENT);
217 msg("No group entry for %s.\n", OPGRENT);
223 struct tm *localclock;
226 * We fork a child to do the actual broadcasting, so
227 * that the process control groups are not messed up
230 broadcast(const char *message)
238 if (!notify || gp == NULL)
241 switch (pid = fork()) {
247 while (wait(&s) != pid)
253 localclock = localtime(&clock);
255 if ((f_utmp = fopen(_PATH_UTMP, "r")) == NULL) {
256 msg("Cannot open %s: %s\n", _PATH_UTMP, strerror(errno));
260 while (!feof(f_utmp)) {
261 if (fread((char *) &utmp, sizeof (struct utmp), 1, f_utmp) != 1)
263 if (utmp.ut_name[0] == 0)
265 for (np = gp->gr_mem; *np; np++) {
266 if (strncmp(*np, utmp.ut_name, sizeof(utmp.ut_name)) != 0)
269 * Do not send messages to operators on dialups
271 if (strncmp(utmp.ut_line, DIALUP, strlen(DIALUP)) == 0)
274 msg("Message to %s at %s\n", *np, utmp.ut_line);
276 sendmes(utmp.ut_line, message);
279 (void) fclose(f_utmp);
280 Exit(0); /* the wait in this same routine will catch this */
285 sendmes(const char *tty, const char *message)
287 char t[MAXPATHLEN], buf[BUFSIZ];
292 (void) strcpy(t, _PATH_DEV);
293 (void) strncat(t, tty, sizeof t - strlen(_PATH_DEV) - 1);
295 if ((f_tty = fopen(t, "w")) != NULL) {
297 (void) fprintf(f_tty,
299 \7\7\7Message from the dump program to all operators at %d:%02d ...\r\n\n\
300 DUMP: NEEDS ATTENTION: ",
301 localclock->tm_hour, localclock->tm_min);
302 for (cp = lastmsg; ; cp++) {
306 if (!(cp && *cp != '\0'))
313 (void) putc('\r', f_tty);
314 (void) putc(*cp, f_tty);
316 (void) fclose(f_tty);
321 * print out an estimate of the amount of time left to do the dump
324 time_t tschedule = 0;
329 time_t tnow = time(NULL);
331 if (tnow >= tschedule) {
332 char *buf = mktimeest(tnow);
333 tschedule = tnow + 300;
335 fprintf(stderr, " DUMP: ");
336 fwrite(buf, strlen(buf), 1, stderr);
344 msg(const char *fmt, ...)
353 (void) fprintf(stderr," DUMP: ");
355 (void) fprintf(stderr, "pid=%d ", getpid());
362 (void) vfprintf(stderr, fmt, ap);
364 (void) fflush(stdout);
365 (void) fflush(stderr);
371 (void) vsnprintf(lastmsg, sizeof(lastmsg), fmt, ap);
377 msgtail(const char *fmt, ...)
379 msgtail(fmt, va_alist)
390 (void) vfprintf(stderr, fmt, ap);
396 quit(const char *fmt, ...)
405 (void) fprintf(stderr," DUMP: ");
407 (void) fprintf(stderr, "pid=%d ", getpid());
414 (void) vfprintf(stderr, fmt, ap);
416 (void) fflush(stdout);
417 (void) fflush(stderr);
422 * Tell the operator what has to be done;
423 * we don't actually do it
426 static struct fstab *
427 allocfsent(struct fstab *fs)
431 new = (struct fstab *)malloc(sizeof (*fs));
433 quit("%s\n", strerror(errno));
434 if (strlen(fs->fs_file) > 1 && fs->fs_file[strlen(fs->fs_file) - 1] == '/')
435 fs->fs_file[strlen(fs->fs_file) - 1] = '\0';
436 if ((new->fs_file = strdup(fs->fs_file)) == NULL ||
437 (new->fs_type = strdup(fs->fs_type)) == NULL ||
438 (new->fs_vfstype = strdup(fs->fs_vfstype)) == NULL ||
439 (new->fs_spec = strdup(fs->fs_spec)) == NULL)
440 quit("%s\n", strerror(errno));
441 new->fs_passno = fs->fs_passno;
442 new->fs_freq = fs->fs_freq;
447 struct pfstab *pf_next;
448 struct dumpdates *pf_dd;
449 struct fstab *pf_fstab;
452 static struct pfstab *table;
459 struct pfstab *pfold = NULL;
461 if (setfsent() == 0) {
462 msg("Can't open %s for dump table information: %s\n",
463 _PATH_FSTAB, strerror(errno));
466 while ((fs = getfsent()) != NULL) {
467 if (strcmp(fs->fs_type, FSTAB_RW) &&
468 strcmp(fs->fs_type, FSTAB_RO) &&
469 strcmp(fs->fs_type, FSTAB_RQ))
473 if ((pf = (struct pfstab *)malloc(sizeof (*pf))) == NULL)
474 quit("%s\n", strerror(errno));
478 /* keep table in /etc/fstab order for use with -w and -W */
490 * Search in the fstab for a file name.
491 * This file name can be either the special or the path file name.
493 * The entries in the fstab are the BLOCK special names, not the
494 * character special names.
495 * The caller of fstabsearch assures that the character device
496 * is dumped (that is much faster)
498 * The file name can omit the leading '/'.
501 fstabsearch(const char *key)
507 for (pf = table; pf != NULL; pf = pf->pf_next) {
509 if (strcmp(fs->fs_file, key) == 0 ||
510 strcmp(fs->fs_spec, key) == 0)
512 rn = rawname(fs->fs_spec);
513 if (rn != NULL && strcmp(rn, key) == 0)
516 if (*fs->fs_spec == '/' &&
517 strcmp(fs->fs_spec + 1, key) == 0)
519 if (*fs->fs_file == '/' &&
520 strcmp(fs->fs_file + 1, key) == 0)
529 fstabsearchdir(const char *key, char *directory)
533 struct fstab *found_fs = NULL;
534 unsigned int size = 0;
537 if (stat(key, &buf) == 0 && S_ISBLK(buf.st_mode))
540 for (pf = table; pf != NULL; pf = pf->pf_next) {
542 if (strlen(fs->fs_file) > size &&
543 strlen(key) > strlen(fs->fs_file) &&
544 strncmp(fs->fs_file, key, strlen(fs->fs_file)) == 0 &&
545 (key[strlen(fs->fs_file)] == '/' ||
546 fs->fs_file[strlen(fs->fs_file) - 1] == '/')) {
548 size = strlen(fs->fs_file);
551 if (found_fs != NULL) {
553 * Ok, we have found a fstab entry which matches the argument
554 * We have to split the argument name into:
555 * - a device name (from the fstab entry)
556 * - a directory name on this device
558 strcpy(directory, key + size);
565 print_wmsg(char arg, int dumpme, const char *dev, int level,
566 const char *mtpt, time_t ddate)
569 printf("checking dev %s: lvl %d, mtpt %s\n", dev, level, mtpt);
571 if (!dumpme && arg == 'w')
574 (void) printf("%c %8s\t(%6s) Last dump: ",
575 dumpme && (arg != 'w') ? '>' : ' ',
580 * Check ddate > 365 to avoid issues with fs in stab but not dumpdates.
581 * Not a problem, because ddate is in seconds since the epoch anyways.
586 date = (char *)ctime(&ddate);
587 d = strchr(date, '\n');
589 printf("Level %c, Date %s\n", level, date);
595 * Tell the operator what to do
598 lastdump(char arg) /* w ==> just what to do; W ==> most recent dumps */
604 getfstab(); /* /etc/fstab input */
605 initdumptimes(0); /* dumpdates input */
606 if (ddatev == NULL && table == NULL) {
607 (void) printf("No %s or %s file found\n",
608 _PATH_FSTAB, _PATH_DUMPDATES);
613 (void) printf("Dump these file systems:\n");
615 (void) printf("Last dump(s) done (Dump '>' file systems):\n");
617 /* For files in dumpdates, get the last dump level and date */
618 if (ddatev != NULL) {
619 struct dumpdates *dtwalk = NULL;
623 qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort);
626 ITITERATE(i, dtwalk) {
628 if (strncmp(lastname, dtwalk->dd_name,
629 sizeof(dtwalk->dd_name)) == 0)
631 lastname = dtwalk->dd_name;
632 if ((dt = dtwalk->dd_fstab) != NULL) {
633 /* Overload fs_freq as dump level and
634 * fs_passno as date, because we can't
635 * change struct fstab format.
636 * A positive fs_freq means this
637 * filesystem needs to be dumped.
639 dt->fs_passno = dtwalk->dd_ddate;
640 if (dt->fs_freq > 0 && (dtwalk->dd_ddate <
641 tnow - (dt->fs_freq * 86400)))
642 dt->fs_freq = dtwalk->dd_level;
644 dt->fs_freq = -dtwalk->dd_level;
646 printf("%s fs_freq set to %d\n", lastname,
653 /* print in /etc/fstab order only those filesystem types we can dump */
654 for (pf = table; pf != NULL; pf = pf->pf_next) {
655 struct fstab *dt = pf->pf_fstab;
658 for (type = fstypes; *type != NULL; type++) {
659 if (strncmp(dt->fs_vfstype, *type,
660 sizeof(dt->fs_vfstype)) == 0) {
661 const char *disk = get_device_name(dt->fs_spec);
662 print_wmsg(arg, dt->fs_freq > 0,
663 disk ? disk : dt->fs_spec,
664 dt->fs_freq < 0 ? -dt->fs_freq :
672 /* print in /etc/dumpdates order if not in /etc/fstab */
673 if (ddatev != NULL) {
674 struct dumpdates *dtwalk = NULL;
679 ITITERATE(i, dtwalk) {
680 if (strncmp(lastname, dtwalk->dd_name,
681 sizeof(dtwalk->dd_name)) == 0 ||
682 dtwalk->dd_fstab != NULL)
684 lastname = dtwalk->dd_name;
685 print_wmsg(arg, 0, dtwalk->dd_name,
686 dtwalk->dd_level, NULL, dtwalk->dd_ddate);
692 datesort(const void *a1, const void *a2)
694 struct dumpdates *d1 = *(struct dumpdates **)a1;
695 struct dumpdates *d2 = *(struct dumpdates **)a2;
698 diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
700 return (d2->dd_ddate - d1->dd_ddate);