1 /* $OpenBSD: optr.c,v 1.42 2024/05/09 08:35:40 florian Exp $ */
2 /* $NetBSD: optr.c,v 1.11 1997/05/27 08:34:36 mrg Exp $ */
3
4 /*-
5 * Copyright (c) 1980, 1988, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/param.h> /* MAXBSIZE */
34 #include <sys/wait.h>
35 #include <sys/time.h>
36
37 #include <ufs/ufs/dinode.h>
38
39 #include <errno.h>
40 #include <fstab.h>
41 #include <grp.h>
42 #include <signal.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <stdarg.h>
47 #include <unistd.h>
48 #include <limits.h>
49 #include <utmp.h>
50
51 #include "dump.h"
52 #include "pathnames.h"
53
54 void alarmcatch(int);
55 int datesort(const void *, const void *);
56
57 /*
58 * Query the operator; This previously-fascist piece of code
59 * no longer requires an exact response.
60 * It is intended to protect dump aborting by inquisitive
61 * people banging on the console terminal to see what is
62 * happening which might cause dump to croak, destroying
63 * a large number of hours of work.
64 *
65 * Every 2 minutes we reprint the message, alerting others
66 * that dump needs attention.
67 */
68 static int timeout;
69 static char *attnmessage; /* attention message */
70
71 struct fstab *allocfsent(struct fstab *fs);
72
73 int
query(char * question)74 query(char *question)
75 {
76 char replybuffer[64];
77 int back, errcount;
78 FILE *mytty;
79 time_t firstprompt, when_answered;
80
81 (void) time(&firstprompt);
82
83 if ((mytty = fopen(_PATH_TTY, "r")) == NULL)
84 quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno));
85 attnmessage = question;
86 timeout = 0;
87 alarmcatch(0);
88 back = -1;
89 errcount = 0;
90 do {
91 if (fgets(replybuffer, sizeof(replybuffer), mytty) == NULL) {
92 clearerr(mytty);
93 if (++errcount > 30) /* XXX ugly */
94 quit("excessive operator query failures\n");
95 } else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') {
96 back = 1;
97 } else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') {
98 back = 0;
99 } else {
100 (void) fprintf(stderr,
101 " DUMP: \"Yes\" or \"No\"?\n");
102 (void) fprintf(stderr,
103 " DUMP: %s: (\"yes\" or \"no\") ", question);
104 }
105 } while (back < 0);
106
107 /*
108 * Turn off the alarm, and reset the signal to trap out..
109 */
110 (void) alarm(0);
111 if (signal(SIGALRM, sig) == SIG_IGN)
112 signal(SIGALRM, SIG_IGN);
113 (void) fclose(mytty);
114 (void) time(&when_answered);
115 /*
116 * Adjust the base for time estimates to ignore time we spent waiting
117 * for operator input.
118 */
119 if (when_answered - firstprompt > 0)
120 tstart_writing += (when_answered - firstprompt);
121 return (back);
122 }
123
124 char lastmsg[BUFSIZ];
125
126 /*
127 * Alert the console operator, and enable the alarm clock to
128 * sleep for 2 minutes in case nobody comes to satisfy dump
129 * XXX not safe
130 */
131 void
alarmcatch(int signo)132 alarmcatch(int signo)
133 {
134 int save_errno = errno;
135
136 if (notify == 0) {
137 if (timeout == 0)
138 (void) fprintf(stderr,
139 " DUMP: %s: (\"yes\" or \"no\") ",
140 attnmessage);
141 else
142 msgtail("\7\7");
143 } else {
144 if (timeout) {
145 msgtail("\n");
146 broadcast(""); /* just print last msg */
147 }
148 (void) fprintf(stderr," DUMP: %s: (\"yes\" or \"no\") ",
149 attnmessage);
150 }
151 signal(SIGALRM, alarmcatch);
152 (void) alarm(120);
153 timeout = 1;
154 errno = save_errno;
155 }
156
157 /*
158 * Here if an inquisitive operator interrupts the dump program
159 */
160 void
interrupt(int signo)161 interrupt(int signo)
162 {
163 msg("Interrupt received.\n");
164 if (query("Do you want to abort dump?"))
165 dumpabort(0);
166 }
167
168 /*
169 * We now use wall(1) to do the actual broadcasting.
170 */
171 void
broadcast(char * message)172 broadcast(char *message)
173 {
174 FILE *fp;
175 char buf[sizeof(_PATH_WALL) + sizeof(OPGRENT) + 3];
176
177 if (!notify)
178 return;
179
180 (void)snprintf(buf, sizeof(buf), "%s -g %s", _PATH_WALL, OPGRENT);
181 if ((fp = popen(buf, "w")) == NULL)
182 return;
183
184 (void) fputs("\7\7\7Message from the dump program to all operators\n\nDUMP: NEEDS ATTENTION: ", fp);
185 if (lastmsg[0])
186 (void) fputs(lastmsg, fp);
187 if (message[0])
188 (void) fputs(message, fp);
189
190 (void) pclose(fp);
191 }
192
193 /*
194 * Print out an estimate of the amount of time left to do the dump
195 */
196
197 time_t tschedule = 0;
198
199 void
timeest(void)200 timeest(void)
201 {
202 time_t tnow, deltat;
203
204 (void) time(&tnow);
205 if (tnow >= tschedule) {
206 tschedule = tnow + 300;
207 if (blockswritten < 500)
208 return;
209 deltat = tstart_writing - tnow +
210 (1.0 * (tnow - tstart_writing))
211 / blockswritten * tapesize;
212 msg("%3.2f%% done, finished in %lld:%02lld\n",
213 (blockswritten * 100.0) / tapesize,
214 (long long)deltat / 3600,
215 ((long long)deltat % 3600) / 60);
216 }
217 }
218
219 void
msg(const char * fmt,...)220 msg(const char *fmt, ...)
221 {
222 va_list ap;
223
224 (void) fprintf(stderr," DUMP: ");
225 #ifdef TDEBUG
226 (void) fprintf(stderr, "pid=%d ", getpid());
227 #endif
228 va_start(ap, fmt);
229 (void) vfprintf(stderr, fmt, ap);
230 va_end(ap);
231 (void) fflush(stdout);
232 (void) fflush(stderr);
233 va_start(ap, fmt);
234 (void) vsnprintf(lastmsg, sizeof(lastmsg), fmt, ap);
235 va_end(ap);
236 }
237
238 void
msgtail(const char * fmt,...)239 msgtail(const char *fmt, ...)
240 {
241 va_list ap;
242
243 va_start(ap, fmt);
244 (void) vfprintf(stderr, fmt, ap);
245 va_end(ap);
246 }
247
248 /* XXX signal races */
249 void
quit(const char * fmt,...)250 quit(const char *fmt, ...)
251 {
252 va_list ap;
253
254 (void) fprintf(stderr," DUMP: ");
255 #ifdef TDEBUG
256 (void) fprintf(stderr, "pid=%d ", getpid());
257 #endif
258 va_start(ap, fmt);
259 (void) vfprintf(stderr, fmt, ap);
260 va_end(ap);
261 (void) fflush(stdout);
262 (void) fflush(stderr);
263 dumpabort(0);
264 }
265
266 /*
267 * Tell the operator what has to be done;
268 * we don't actually do it
269 */
270
271 struct fstab *
allocfsent(struct fstab * fs)272 allocfsent(struct fstab *fs)
273 {
274 struct fstab *new;
275
276 new = malloc(sizeof(*fs));
277 if (new == NULL ||
278 (new->fs_file = strdup(fs->fs_file)) == NULL ||
279 (new->fs_type = strdup(fs->fs_type)) == NULL ||
280 (new->fs_spec = strdup(fs->fs_spec)) == NULL)
281 quit("%s\n", strerror(errno));
282 new->fs_passno = fs->fs_passno;
283 new->fs_freq = fs->fs_freq;
284 return (new);
285 }
286
287 struct pfstab {
288 struct pfstab *pf_next;
289 struct fstab *pf_fstab;
290 };
291
292 static struct pfstab *table;
293
294 void
getfstab(void)295 getfstab(void)
296 {
297 struct fstab *fs;
298 struct pfstab *pf;
299
300 if (setfsent() == 0) {
301 msg("Can't open %s for dump table information: %s\n",
302 _PATH_FSTAB, strerror(errno));
303 return;
304 }
305 while ((fs = getfsent()) != NULL) {
306 if (strcmp(fs->fs_vfstype, "ffs") &&
307 strcmp(fs->fs_vfstype, "ufs"))
308 continue;
309 if (strcmp(fs->fs_type, FSTAB_RW) &&
310 strcmp(fs->fs_type, FSTAB_RO) &&
311 strcmp(fs->fs_type, FSTAB_RQ))
312 continue;
313 fs = allocfsent(fs);
314 if ((pf = malloc(sizeof(*pf))) == NULL)
315 quit("%s\n", strerror(errno));
316 pf->pf_fstab = fs;
317 pf->pf_next = table;
318 table = pf;
319 }
320 (void) endfsent();
321 }
322
323 /*
324 * Search in the fstab for a file name.
325 * This file name can be either the special or the path file name.
326 *
327 * The entries in the fstab are the BLOCK special names, not the
328 * character special names.
329 * The caller of fstabsearch assures that the character device
330 * is dumped (that is much faster)
331 *
332 * The file name can omit the leading '/'.
333 */
334 struct fstab *
fstabsearch(char * key)335 fstabsearch(char *key)
336 {
337 struct pfstab *pf;
338 struct fstab *fs;
339 char *rn, *uid;
340
341 for (pf = table; pf != NULL; pf = pf->pf_next) {
342 fs = pf->pf_fstab;
343 if (strcmp(fs->fs_file, key) == 0 ||
344 strcmp(fs->fs_spec, key) == 0)
345 return (fs);
346 rn = rawname(fs->fs_spec);
347 if (rn != NULL && strcmp(rn, key) == 0)
348 return (fs);
349 uid = getduid(rn != NULL ? rn : fs->fs_spec);
350 if (uid != NULL && strcmp(uid, key) == 0) {
351 free(uid);
352 return (fs);
353 }
354 free(uid);
355 if (key[0] != '/') {
356 if (*fs->fs_spec == '/' &&
357 strcmp(fs->fs_spec + 1, key) == 0)
358 return (fs);
359 if (*fs->fs_file == '/' &&
360 strcmp(fs->fs_file + 1, key) == 0)
361 return (fs);
362 }
363 }
364 return (NULL);
365 }
366
367 #define SECSPERDAY (24 * 60 * 60)
368
369 /*
370 * Tell the operator what to do
371 * w ==> just what to do; W ==> most recent dumps
372 */
373 void
lastdump(int arg)374 lastdump(int arg)
375 {
376 int i;
377 struct fstab *dt;
378 struct dumpdates *dtwalk;
379 char *lastname, *date;
380 int dumpme;
381 time_t tnow;
382
383 (void) time(&tnow);
384 getfstab(); /* /etc/fstab input */
385 initdumptimes(); /* /etc/dumpdates input */
386 qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort);
387
388 if (arg == 'w')
389 (void) printf("Dump these file systems:\n");
390 else
391 (void) printf("Last dump(s) done (Dump '>' file systems):\n");
392 lastname = "??";
393 ITITERATE(i, dtwalk) {
394 if (strncmp(lastname, dtwalk->dd_name,
395 sizeof(dtwalk->dd_name)) == 0)
396 continue;
397 date = ctime(&dtwalk->dd_ddate);
398 if (date)
399 date[16] = '\0'; /* blast away seconds and year */
400 else
401 date = "?";
402 lastname = dtwalk->dd_name;
403 dt = fstabsearch(dtwalk->dd_name);
404 dumpme = (dt != NULL &&
405 dt->fs_freq != 0 &&
406 dtwalk->dd_ddate < tnow - (dt->fs_freq * SECSPERDAY));
407 if (arg != 'w' || dumpme)
408 (void) printf(
409 "%c %8s\t(%6s) Last dump: Level %c, Date %s\n",
410 dumpme && (arg != 'w') ? '>' : ' ',
411 dtwalk->dd_name,
412 dt ? dt->fs_file : "",
413 dtwalk->dd_level,
414 date);
415 }
416 }
417
418 int
datesort(const void * a1,const void * a2)419 datesort(const void *a1, const void *a2)
420 {
421 struct dumpdates *d1 = *(struct dumpdates **)a1;
422 struct dumpdates *d2 = *(struct dumpdates **)a2;
423 int diff;
424
425 diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
426 if (diff == 0)
427 return (d2->dd_ddate < d1->dd_ddate ? -1 :
428 (d2->dd_ddate > d1->dd_ddate ? 1 : 0));
429 return (diff);
430 }
431