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@cybercable.fr>, 1999-2000
9 * Copyright (c) 1980, 1988, 1993
10 * The Regents of the University of California. All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 static const char rcsid[] =
43 "$Id: optr.c,v 1.9 2000/01/26 11:38:08 stelian Exp $";
46 #include <sys/param.h>
62 #include <linux/ext2_fs.h>
63 #include <ext2fs/ext2fs.h>
64 #include <bsdcompat.h>
69 #include "pathnames.h"
71 static void alarmcatch __P((int));
72 int datesort __P((const void *, const void *));
73 static void sendmes __P((const char *, const char *));
76 * Query the operator; This previously-fascist piece of code
77 * no longer requires an exact response.
78 * It is intended to protect dump aborting by inquisitive
79 * people banging on the console terminal to see what is
80 * happening which might cause dump to croak, destroying
81 * a large number of hours of work.
83 * Every 2 minutes we reprint the message, alerting others
84 * that dump needs attention.
87 static const char *attnmessage; /* attention message */
90 query(const char *question)
95 time_t firstprompt, when_answered;
98 (void)time4(&(firstprompt));
100 (void)time((time_t *)&(firstprompt));
103 if ((mytty = fopen(_PATH_TTY, "r")) == NULL)
104 quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno));
105 attnmessage = question;
111 if (fgets(replybuffer, 63, mytty) == NULL) {
113 if (++errcount > 30) /* XXX ugly */
114 quit("excessive operator query failures\n");
115 } else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') {
117 } else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') {
120 (void) fprintf(stderr,
121 " DUMP: \"Yes\" or \"No\"?\n");
122 (void) fprintf(stderr,
123 " DUMP: %s: (\"yes\" or \"no\") ", question);
128 * Turn off the alarm, and reset the signal to trap out..
131 if (signal(SIGALRM, sig) == SIG_IGN)
132 signal(SIGALRM, SIG_IGN);
133 (void) fclose(mytty);
135 (void)time4(&(when_answered));
137 (void)time((time_t *)&(when_answered));
140 * Adjust the base for time estimates to ignore time we spent waiting
141 * for operator input.
143 if ((tstart_writing != 0) && (when_answered != (time_t)-1) && (firstprompt != (time_t)-1))
144 tstart_writing += (when_answered - firstprompt);
148 char lastmsg[BUFSIZ];
151 * Alert the console operator, and enable the alarm clock to
152 * sleep for 2 minutes in case nobody comes to satisfy dump
155 alarmcatch(int signo)
157 int save_errno = errno;
160 (void) fprintf(stderr,
161 " DUMP: %s: (\"yes\" or \"no\") ",
168 broadcast(""); /* just print last msg */
170 (void) fprintf(stderr," DUMP: %s: (\"yes\" or \"no\") ",
173 signal(SIGALRM, alarmcatch);
180 * Here if an inquisitive operator interrupts the dump program
185 msg("Interrupt received.\n");
186 if (query("Do you want to abort dump?"))
191 * The following variables and routines manage alerting
192 * operators to the status of dump.
193 * This works much like wall(1) does.
198 * Get the names from the group entry "operator" to notify.
203 if (!notify) /*not going to notify*/
205 gp = getgrnam(OPGRENT);
208 msg("No group entry for %s.\n", OPGRENT);
214 struct tm *localclock;
217 * We fork a child to do the actual broadcasting, so
218 * that the process control groups are not messed up
221 broadcast(const char *message)
229 if (!notify || gp == NULL)
232 switch (pid = fork()) {
238 while (wait(&s) != pid)
243 clock = time((time_t *)0);
244 localclock = localtime(&clock);
246 if ((f_utmp = fopen(_PATH_UTMP, "r")) == NULL) {
247 msg("Cannot open %s: %s\n", _PATH_UTMP, strerror(errno));
251 while (!feof(f_utmp)) {
252 if (fread((char *) &utmp, sizeof (struct utmp), 1, f_utmp) != 1)
254 if (utmp.ut_name[0] == 0)
256 for (np = gp->gr_mem; *np; np++) {
257 if (strncmp(*np, utmp.ut_name, sizeof(utmp.ut_name)) != 0)
260 * Do not send messages to operators on dialups
262 if (strncmp(utmp.ut_line, DIALUP, strlen(DIALUP)) == 0)
265 msg("Message to %s at %s\n", *np, utmp.ut_line);
267 sendmes(utmp.ut_line, message);
270 (void) fclose(f_utmp);
271 Exit(0); /* the wait in this same routine will catch this */
276 sendmes(const char *tty, const char *message)
278 char t[MAXPATHLEN], buf[BUFSIZ];
279 register const char *cp;
283 (void) strcpy(t, _PATH_DEV);
284 (void) strncat(t, tty, sizeof t - strlen(_PATH_DEV) - 1);
286 if ((f_tty = fopen(t, "w")) != NULL) {
288 (void) fprintf(f_tty,
290 \7\7\7Message from the dump program to all operators at %d:%02d ...\r\n\n\
291 DUMP: NEEDS ATTENTION: ",
292 localclock->tm_hour, localclock->tm_min);
293 for (cp = lastmsg; ; cp++) {
297 if (!(cp && *cp != '\0'))
304 (void) putc('\r', f_tty);
305 (void) putc(*cp, f_tty);
307 (void) fclose(f_tty);
312 * print out an estimate of the amount of time left to do the dump
315 time_t tschedule = 0;
325 (void) time((time_t *) &tnow);
327 if (tnow >= tschedule) {
328 tschedule = tnow + 300;
329 if (blockswritten < 500)
331 deltat = tstart_writing - tnow +
332 (1.0 * (tnow - tstart_writing))
333 / blockswritten * tapesize;
334 msg("%3.2f%% done, finished in %d:%02d\n",
335 (blockswritten * 100.0) / tapesize,
336 deltat / 3600, (deltat % 3600) / 60);
342 msg(const char *fmt, ...)
351 (void) fprintf(stderr," DUMP: ");
353 (void) fprintf(stderr, "pid=%d ", getpid());
360 (void) vfprintf(stderr, fmt, ap);
362 (void) fflush(stdout);
363 (void) fflush(stderr);
369 (void) vsnprintf(lastmsg, sizeof(lastmsg), fmt, ap);
375 msgtail(const char *fmt, ...)
377 msgtail(fmt, va_alist)
388 (void) vfprintf(stderr, fmt, ap);
394 quit(const char *fmt, ...)
403 (void) fprintf(stderr," DUMP: ");
405 (void) fprintf(stderr, "pid=%d ", getpid());
412 (void) vfprintf(stderr, fmt, ap);
414 (void) fflush(stdout);
415 (void) fflush(stderr);
420 * Tell the operator what has to be done;
421 * we don't actually do it
424 static struct fstab *
425 allocfsent(struct fstab *fs)
427 register struct fstab *new;
429 new = (struct fstab *)malloc(sizeof (*fs));
431 quit("%s\n", strerror(errno));
432 if (strlen(fs->fs_file) > 1 && fs->fs_file[strlen(fs->fs_file) - 1] == '/')
433 fs->fs_file[strlen(fs->fs_file) - 1] = '\0';
434 if ((new->fs_file = strdup(fs->fs_file)) == NULL ||
435 (new->fs_type = strdup(fs->fs_type)) == NULL ||
436 (new->fs_spec = strdup(fs->fs_spec)) == NULL)
437 quit("%s\n", strerror(errno));
438 new->fs_passno = fs->fs_passno;
439 new->fs_freq = fs->fs_freq;
444 struct pfstab *pf_next;
445 struct fstab *pf_fstab;
448 static struct pfstab *table;
453 register struct fstab *fs;
454 register struct pfstab *pf;
456 if (setfsent() == 0) {
457 msg("Can't open %s for dump table information: %s\n",
458 _PATH_FSTAB, strerror(errno));
461 while ((fs = getfsent()) != NULL) {
462 if (strcmp(fs->fs_type, FSTAB_RW) &&
463 strcmp(fs->fs_type, FSTAB_RO) &&
464 strcmp(fs->fs_type, FSTAB_RQ))
467 if ((pf = (struct pfstab *)malloc(sizeof (*pf))) == NULL)
468 quit("%s\n", strerror(errno));
477 * Search in the fstab for a file name.
478 * This file name can be either the special or the path file name.
480 * The entries in the fstab are the BLOCK special names, not the
481 * character special names.
482 * The caller of fstabsearch assures that the character device
483 * is dumped (that is much faster)
485 * The file name can omit the leading '/'.
488 fstabsearch(const char *key)
490 register struct pfstab *pf;
491 register struct fstab *fs;
494 for (pf = table; pf != NULL; pf = pf->pf_next) {
496 if (strcmp(fs->fs_file, key) == 0 ||
497 strcmp(fs->fs_spec, key) == 0)
499 rn = rawname(fs->fs_spec);
500 if (rn != NULL && strcmp(rn, key) == 0)
503 if (*fs->fs_spec == '/' &&
504 strcmp(fs->fs_spec + 1, key) == 0)
506 if (*fs->fs_file == '/' &&
507 strcmp(fs->fs_file + 1, key) == 0)
516 fstabsearchdir(const char *key, char *directory)
518 register struct pfstab *pf;
519 register struct fstab *fs;
520 register struct fstab *found_fs = NULL;
521 unsigned int size = 0;
524 if (stat(key, &buf) == 0 && S_ISBLK(buf.st_mode))
527 for (pf = table; pf != NULL; pf = pf->pf_next) {
529 if (strlen(fs->fs_file) > size &&
530 strlen(key) > strlen(fs->fs_file) + 2 &&
531 strncmp(fs->fs_file, key, strlen(fs->fs_file)) == 0 &&
532 (key[strlen(fs->fs_file)] == '/' ||
533 fs->fs_file[strlen(fs->fs_file) - 1] == '/')) {
535 size = strlen(fs->fs_file);
538 if (found_fs != NULL) {
540 * Ok, we have found a fstab entry which matches the argument
541 * We have to split the argument name into:
542 * - a device name (from the fstab entry)
543 * - a directory name on this device
545 strcpy(directory, key + size);
552 * Tell the operator what to do
555 lastdump(char arg) /* w ==> just what to do; W ==> most recent dumps */
558 register struct fstab *dt;
559 register struct dumpdates *dtwalk=NULL;
560 char *lastname, *date;
565 getfstab(); /* /etc/fstab input */
566 initdumptimes(0); /* dumpdates input */
567 if (ddatev != NULL) {
568 qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort);
571 (void) printf("Dump these file systems:\n");
573 (void) printf("Last dump(s) done (Dump '>' file systems):\n");
575 ITITERATE(i, dtwalk) {
576 if (strncmp(lastname, dtwalk->dd_name,
577 sizeof(dtwalk->dd_name)) == 0)
579 date = (char *)ctime(&dtwalk->dd_ddate);
580 date[16] = '\0'; /* blast away seconds and year */
581 lastname = dtwalk->dd_name;
582 dt = fstabsearch(dtwalk->dd_name);
583 dumpme = (dt != NULL &&
585 dtwalk->dd_ddate < tnow - (dt->fs_freq * 86400));
586 if (arg != 'w' || dumpme)
588 "%c %8s\t(%6s) Last dump: Level %c, Date %s\n",
589 dumpme && (arg != 'w') ? '>' : ' ',
591 dt ? dt->fs_file : "",
599 datesort(const void *a1, const void *a2)
601 struct dumpdates *d1 = *(struct dumpdates **)a1;
602 struct dumpdates *d2 = *(struct dumpdates **)a2;
605 diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
607 return (d2->dd_ddate - d1->dd_ddate);