1 /*-
2 * Copyright (c) 1980, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char sccsid[] = "@(#)optr.c 8.2 (Berkeley) 01/06/94";
10 #endif /* not lint */
11
12 #include <sys/param.h>
13 #include <sys/wait.h>
14 #include <sys/time.h>
15
16 #include <errno.h>
17 #include <fstab.h>
18 #include <grp.h>
19 #include <signal.h>
20 #include <stdio.h>
21 #ifdef __STDC__
22 #include <stdlib.h>
23 #include <string.h>
24 #include <stdarg.h>
25 #endif
26 #include <tzfile.h>
27 #ifdef __STDC__
28 #include <unistd.h>
29 #endif
30 #include <utmp.h>
31 #ifndef __STDC__
32 #include <varargs.h>
33 #endif
34
35 #include "dump.h"
36 #include "pathnames.h"
37
38 void alarmcatch __P((/* int, int */));
39 int datesort __P((const void *, const void *));
40 static void sendmes __P((char *, char *));
41
42 /*
43 * Query the operator; This previously-fascist piece of code
44 * no longer requires an exact response.
45 * It is intended to protect dump aborting by inquisitive
46 * people banging on the console terminal to see what is
47 * happening which might cause dump to croak, destroying
48 * a large number of hours of work.
49 *
50 * Every 2 minutes we reprint the message, alerting others
51 * that dump needs attention.
52 */
53 static int timeout;
54 static char *attnmessage; /* attention message */
55
56 int
query(question)57 query(question)
58 char *question;
59 {
60 char replybuffer[64];
61 int back, errcount;
62 FILE *mytty;
63
64 if ((mytty = fopen(_PATH_TTY, "r")) == NULL)
65 quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno));
66 attnmessage = question;
67 timeout = 0;
68 alarmcatch();
69 back = -1;
70 errcount = 0;
71 do {
72 if (fgets(replybuffer, 63, mytty) == NULL) {
73 clearerr(mytty);
74 if (++errcount > 30) /* XXX ugly */
75 quit("excessive operator query failures\n");
76 } else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') {
77 back = 1;
78 } else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') {
79 back = 0;
80 } else {
81 (void) fprintf(stderr,
82 " DUMP: \"Yes\" or \"No\"?\n");
83 (void) fprintf(stderr,
84 " DUMP: %s: (\"yes\" or \"no\") ", question);
85 }
86 } while (back < 0);
87
88 /*
89 * Turn off the alarm, and reset the signal to trap out..
90 */
91 (void) alarm(0);
92 if (signal(SIGALRM, sig) == SIG_IGN)
93 signal(SIGALRM, SIG_IGN);
94 (void) fclose(mytty);
95 return(back);
96 }
97
98 char lastmsg[100];
99
100 /*
101 * Alert the console operator, and enable the alarm clock to
102 * sleep for 2 minutes in case nobody comes to satisfy dump
103 */
104 void
alarmcatch()105 alarmcatch()
106 {
107 if (notify == 0) {
108 if (timeout == 0)
109 (void) fprintf(stderr,
110 " DUMP: %s: (\"yes\" or \"no\") ",
111 attnmessage);
112 else
113 msgtail("\7\7");
114 } else {
115 if (timeout) {
116 msgtail("\n");
117 broadcast(""); /* just print last msg */
118 }
119 (void) fprintf(stderr," DUMP: %s: (\"yes\" or \"no\") ",
120 attnmessage);
121 }
122 signal(SIGALRM, alarmcatch);
123 (void) alarm(120);
124 timeout = 1;
125 }
126
127 /*
128 * Here if an inquisitive operator interrupts the dump program
129 */
130 void
interrupt(signo)131 interrupt(signo)
132 int signo;
133 {
134 msg("Interrupt received.\n");
135 if (query("Do you want to abort dump?"))
136 dumpabort(0);
137 }
138
139 /*
140 * The following variables and routines manage alerting
141 * operators to the status of dump.
142 * This works much like wall(1) does.
143 */
144 struct group *gp;
145
146 /*
147 * Get the names from the group entry "operator" to notify.
148 */
149 void
set_operators()150 set_operators()
151 {
152 if (!notify) /*not going to notify*/
153 return;
154 gp = getgrnam(OPGRENT);
155 (void) endgrent();
156 if (gp == NULL) {
157 msg("No group entry for %s.\n", OPGRENT);
158 notify = 0;
159 return;
160 }
161 }
162
163 struct tm *localclock;
164
165 /*
166 * We fork a child to do the actual broadcasting, so
167 * that the process control groups are not messed up
168 */
169 void
broadcast(message)170 broadcast(message)
171 char *message;
172 {
173 time_t clock;
174 FILE *f_utmp;
175 struct utmp utmp;
176 char **np;
177 int pid, s;
178
179 if (!notify || gp == NULL)
180 return;
181
182 switch (pid = fork()) {
183 case -1:
184 return;
185 case 0:
186 break;
187 default:
188 while (wait(&s) != pid)
189 continue;
190 return;
191 }
192
193 clock = time((time_t *)0);
194 localclock = localtime(&clock);
195
196 if ((f_utmp = fopen(_PATH_UTMP, "r")) == NULL) {
197 msg("Cannot open %s: %s\n", _PATH_UTMP, strerror(errno));
198 return;
199 }
200
201 while (!feof(f_utmp)) {
202 if (fread((char *) &utmp, sizeof (struct utmp), 1, f_utmp) != 1)
203 break;
204 if (utmp.ut_name[0] == 0)
205 continue;
206 for (np = gp->gr_mem; *np; np++) {
207 if (strncmp(*np, utmp.ut_name, sizeof(utmp.ut_name)) != 0)
208 continue;
209 /*
210 * Do not send messages to operators on dialups
211 */
212 if (strncmp(utmp.ut_line, DIALUP, strlen(DIALUP)) == 0)
213 continue;
214 #ifdef DEBUG
215 msg("Message to %s at %s\n", *np, utmp.ut_line);
216 #endif
217 sendmes(utmp.ut_line, message);
218 }
219 }
220 (void) fclose(f_utmp);
221 Exit(0); /* the wait in this same routine will catch this */
222 /* NOTREACHED */
223 }
224
225 static void
sendmes(tty,message)226 sendmes(tty, message)
227 char *tty, *message;
228 {
229 char t[50], buf[BUFSIZ];
230 register char *cp;
231 int lmsg = 1;
232 FILE *f_tty;
233
234 (void) strcpy(t, _PATH_DEV);
235 (void) strcat(t, tty);
236
237 if ((f_tty = fopen(t, "w")) != NULL) {
238 setbuf(f_tty, buf);
239 (void) fprintf(f_tty,
240 "\n\
241 \7\7\7Message from the dump program to all operators at %d:%02d ...\r\n\n\
242 DUMP: NEEDS ATTENTION: ",
243 localclock->tm_hour, localclock->tm_min);
244 for (cp = lastmsg; ; cp++) {
245 if (*cp == '\0') {
246 if (lmsg) {
247 cp = message;
248 if (*cp == '\0')
249 break;
250 lmsg = 0;
251 } else
252 break;
253 }
254 if (*cp == '\n')
255 (void) putc('\r', f_tty);
256 (void) putc(*cp, f_tty);
257 }
258 (void) fclose(f_tty);
259 }
260 }
261
262 /*
263 * print out an estimate of the amount of time left to do the dump
264 */
265
266 time_t tschedule = 0;
267
268 void
timeest()269 timeest()
270 {
271 time_t tnow, deltat;
272
273 (void) time((time_t *) &tnow);
274 if (tnow >= tschedule) {
275 tschedule = tnow + 300;
276 if (blockswritten < 500)
277 return;
278 deltat = tstart_writing - tnow +
279 (1.0 * (tnow - tstart_writing))
280 / blockswritten * tapesize;
281 msg("%3.2f%% done, finished in %d:%02d\n",
282 (blockswritten * 100.0) / tapesize,
283 deltat / 3600, (deltat % 3600) / 60);
284 }
285 }
286
287 void
288 #if __STDC__
msg(const char * fmt,...)289 msg(const char *fmt, ...)
290 #else
291 msg(fmt, va_alist)
292 char *fmt;
293 va_dcl
294 #endif
295 {
296 va_list ap;
297
298 (void) fprintf(stderr," DUMP: ");
299 #ifdef TDEBUG
300 (void) fprintf(stderr, "pid=%d ", getpid());
301 #endif
302 #if __STDC__
303 va_start(ap, fmt);
304 #else
305 va_start(ap);
306 #endif
307 (void) vfprintf(stderr, fmt, ap);
308 (void) fflush(stdout);
309 (void) fflush(stderr);
310 (void) vsprintf(lastmsg, fmt, ap);
311 va_end(ap);
312 }
313
314 void
315 #if __STDC__
msgtail(const char * fmt,...)316 msgtail(const char *fmt, ...)
317 #else
318 msgtail(fmt, va_alist)
319 char *fmt;
320 va_dcl
321 #endif
322 {
323 va_list ap;
324 #if __STDC__
325 va_start(ap, fmt);
326 #else
327 va_start(ap);
328 #endif
329 (void) vfprintf(stderr, fmt, ap);
330 va_end(ap);
331 }
332
333 void
334 #if __STDC__
quit(const char * fmt,...)335 quit(const char *fmt, ...)
336 #else
337 quit(fmt, va_alist)
338 char *fmt;
339 va_dcl
340 #endif
341 {
342 va_list ap;
343
344 (void) fprintf(stderr," DUMP: ");
345 #ifdef TDEBUG
346 (void) fprintf(stderr, "pid=%d ", getpid());
347 #endif
348 #if __STDC__
349 va_start(ap, fmt);
350 #else
351 va_start(ap);
352 #endif
353 (void) vfprintf(stderr, fmt, ap);
354 va_end(ap);
355 (void) fflush(stdout);
356 (void) fflush(stderr);
357 dumpabort(0);
358 }
359
360 /*
361 * Tell the operator what has to be done;
362 * we don't actually do it
363 */
364
365 struct fstab *
allocfsent(fs)366 allocfsent(fs)
367 register struct fstab *fs;
368 {
369 register struct fstab *new;
370
371 new = (struct fstab *)malloc(sizeof (*fs));
372 if (new == NULL ||
373 (new->fs_file = strdup(fs->fs_file)) == NULL ||
374 (new->fs_type = strdup(fs->fs_type)) == NULL ||
375 (new->fs_spec = strdup(fs->fs_spec)) == NULL)
376 quit("%s\n", strerror(errno));
377 new->fs_passno = fs->fs_passno;
378 new->fs_freq = fs->fs_freq;
379 return (new);
380 }
381
382 struct pfstab {
383 struct pfstab *pf_next;
384 struct fstab *pf_fstab;
385 };
386
387 static struct pfstab *table;
388
389 void
getfstab()390 getfstab()
391 {
392 register struct fstab *fs;
393 register struct pfstab *pf;
394
395 if (setfsent() == 0) {
396 msg("Can't open %s for dump table information: %s\n",
397 _PATH_FSTAB, strerror(errno));
398 return;
399 }
400 while ((fs = getfsent()) != NULL) {
401 if (strcmp(fs->fs_type, FSTAB_RW) &&
402 strcmp(fs->fs_type, FSTAB_RO) &&
403 strcmp(fs->fs_type, FSTAB_RQ))
404 continue;
405 fs = allocfsent(fs);
406 if ((pf = (struct pfstab *)malloc(sizeof (*pf))) == NULL)
407 quit("%s\n", strerror(errno));
408 pf->pf_fstab = fs;
409 pf->pf_next = table;
410 table = pf;
411 }
412 (void) endfsent();
413 }
414
415 /*
416 * Search in the fstab for a file name.
417 * This file name can be either the special or the path file name.
418 *
419 * The entries in the fstab are the BLOCK special names, not the
420 * character special names.
421 * The caller of fstabsearch assures that the character device
422 * is dumped (that is much faster)
423 *
424 * The file name can omit the leading '/'.
425 */
426 struct fstab *
fstabsearch(key)427 fstabsearch(key)
428 char *key;
429 {
430 register struct pfstab *pf;
431 register struct fstab *fs;
432 char *rn;
433
434 for (pf = table; pf != NULL; pf = pf->pf_next) {
435 fs = pf->pf_fstab;
436 if (strcmp(fs->fs_file, key) == 0 ||
437 strcmp(fs->fs_spec, key) == 0)
438 return (fs);
439 rn = rawname(fs->fs_spec);
440 if (rn != NULL && strcmp(rn, key) == 0)
441 return (fs);
442 if (key[0] != '/') {
443 if (*fs->fs_spec == '/' &&
444 strcmp(fs->fs_spec + 1, key) == 0)
445 return (fs);
446 if (*fs->fs_file == '/' &&
447 strcmp(fs->fs_file + 1, key) == 0)
448 return (fs);
449 }
450 }
451 return (NULL);
452 }
453
454 /*
455 * Tell the operator what to do
456 */
457 void
lastdump(arg)458 lastdump(arg)
459 char arg; /* w ==> just what to do; W ==> most recent dumps */
460 {
461 register int i;
462 register struct fstab *dt;
463 register struct dumpdates *dtwalk;
464 char *lastname, *date;
465 int dumpme;
466 time_t tnow;
467
468 (void) time(&tnow);
469 getfstab(); /* /etc/fstab input */
470 initdumptimes(); /* /etc/dumpdates input */
471 qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort);
472
473 if (arg == 'w')
474 (void) printf("Dump these file systems:\n");
475 else
476 (void) printf("Last dump(s) done (Dump '>' file systems):\n");
477 lastname = "??";
478 ITITERATE(i, dtwalk) {
479 if (strncmp(lastname, dtwalk->dd_name,
480 sizeof(dtwalk->dd_name)) == 0)
481 continue;
482 date = (char *)ctime(&dtwalk->dd_ddate);
483 date[16] = '\0'; /* blast away seconds and year */
484 lastname = dtwalk->dd_name;
485 dt = fstabsearch(dtwalk->dd_name);
486 dumpme = (dt != NULL &&
487 dt->fs_freq != 0 &&
488 dtwalk->dd_ddate < tnow - (dt->fs_freq * SECSPERDAY));
489 if (arg != 'w' || dumpme)
490 (void) printf(
491 "%c %8s\t(%6s) Last dump: Level %c, Date %s\n",
492 dumpme && (arg != 'w') ? '>' : ' ',
493 dtwalk->dd_name,
494 dt ? dt->fs_file : "",
495 dtwalk->dd_level,
496 date);
497 }
498 }
499
500 int
datesort(a1,a2)501 datesort(a1, a2)
502 const void *a1, *a2;
503 {
504 struct dumpdates *d1 = *(struct dumpdates **)a1;
505 struct dumpdates *d2 = *(struct dumpdates **)a2;
506 int diff;
507
508 diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
509 if (diff == 0)
510 return (d2->dd_ddate - d1->dd_ddate);
511 return (diff);
512 }
513