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76797561 DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | static char sccsid[] = "@(#)dumpoptr.c 5.1 (Berkeley) %G%"; | |
9 | #endif not lint | |
10 | ||
f3869107 BJ |
11 | #include "dump.h" |
12 | ||
13 | /* | |
14 | * This is from /usr/include/grp.h | |
15 | * That defined struct group, which conflicts | |
16 | * with the struct group defined in param.h | |
17 | */ | |
18 | struct Group { /* see getgrent(3) */ | |
19 | char *gr_name; | |
20 | char *gr_passwd; | |
21 | int gr_gid; | |
22 | char **gr_mem; | |
23 | }; | |
24 | struct Group *getgrnam(); | |
25 | /* | |
26 | * Query the operator; This fascist piece of code requires | |
27 | * an exact response. | |
28 | * It is intended to protect dump aborting by inquisitive | |
29 | * people banging on the console terminal to see what is | |
30 | * happening which might cause dump to croak, destroying | |
31 | * a large number of hours of work. | |
32 | * | |
33 | * Every 2 minutes we reprint the message, alerting others | |
34 | * that dump needs attention. | |
35 | */ | |
36 | int timeout; | |
37 | char *attnmessage; /* attemtion message */ | |
38 | query(question) | |
39 | char *question; | |
40 | { | |
41 | char replybuffer[64]; | |
42 | int back; | |
43 | FILE *mytty; | |
44 | ||
45 | if ( (mytty = fopen("/dev/tty", "r")) == NULL){ | |
46 | msg("fopen on /dev/tty fails\n"); | |
47 | abort(); | |
48 | } | |
49 | attnmessage = question; | |
50 | timeout = 0; | |
51 | alarmcatch(); | |
52 | for(;;){ | |
53 | if ( fgets(replybuffer, 63, mytty) == NULL){ | |
54 | if (ferror(mytty)){ | |
55 | clearerr(mytty); | |
56 | continue; | |
57 | } | |
58 | } else if ( (strcmp(replybuffer, "yes\n") == 0) || | |
59 | (strcmp(replybuffer, "Yes\n") == 0)){ | |
60 | back = 1; | |
61 | goto done; | |
62 | } else if ( (strcmp(replybuffer, "no\n") == 0) || | |
63 | (strcmp(replybuffer, "No\n") == 0)){ | |
64 | back = 0; | |
65 | goto done; | |
66 | } else { | |
67 | msg("\"Yes\" or \"No\" ONLY!\n"); | |
68 | alarmcatch(); | |
69 | } | |
70 | } | |
71 | done: | |
72 | /* | |
73 | * Turn off the alarm, and reset the signal to trap out.. | |
74 | */ | |
75 | alarm(0); | |
76 | if (signal(SIGALRM, sigalrm) == SIG_IGN) | |
77 | signal(SIGALRM, SIG_IGN); | |
78 | fclose(mytty); | |
79 | return(back); | |
80 | } | |
81 | /* | |
82 | * Alert the console operator, and enable the alarm clock to | |
83 | * sleep for 2 minutes in case nobody comes to satisfy dump | |
84 | */ | |
85 | alarmcatch() | |
86 | { | |
87 | if (timeout) | |
88 | msgtail("\n"); | |
89 | msg("NEEDS ATTENTION: %s: (\"yes\" or \"no\") ", | |
90 | attnmessage); | |
91 | signal(SIGALRM, alarmcatch); | |
92 | alarm(120); | |
93 | timeout = 1; | |
94 | } | |
95 | /* | |
96 | * Here if an inquisitive operator interrupts the dump program | |
97 | */ | |
98 | interrupt() | |
99 | { | |
100 | msg("Interrupt received. Do >>>YOU<<< know what are you doing?\n"); | |
101 | if (query("Do you really want to abort dump?")) | |
102 | dumpabort(); | |
103 | signal(SIGINT, interrupt); | |
104 | } | |
105 | ||
106 | /* | |
107 | * The following variables and routines manage alerting | |
108 | * operators to the status of dump. | |
109 | * This works much like wall(1) does. | |
110 | */ | |
111 | struct Group *gp; | |
112 | ||
113 | /* | |
114 | * Get the names from the group entry "operator" to notify. | |
115 | */ | |
116 | set_operators() | |
117 | { | |
118 | if (!notify) /*not going to notify*/ | |
119 | return; | |
120 | gp = getgrnam(OPGRENT); | |
121 | endgrent(); | |
122 | if (gp == (struct Group *)0){ | |
123 | msg("No entry in /etc/group for %s.\n", | |
124 | OPGRENT); | |
125 | notify = 0; | |
126 | return; | |
127 | } | |
128 | } | |
129 | ||
130 | struct tm *localtime(); | |
131 | struct tm *localclock; | |
132 | ||
133 | /* | |
134 | * We fork a child to do the actual broadcasting, so | |
135 | * that the process control groups are not messed up | |
136 | */ | |
137 | broadcast(message) | |
138 | char *message; | |
139 | { | |
140 | time_t clock; | |
141 | FILE *f_utmp; | |
142 | struct utmp utmp; | |
143 | int nusers; | |
144 | char **np; | |
145 | int pid, s; | |
146 | ||
147 | switch (pid = fork()) { | |
148 | case -1: | |
149 | return; | |
150 | case 0: | |
151 | break; | |
152 | default: | |
153 | while (wait(&s) != pid) | |
154 | continue; | |
155 | return; | |
156 | } | |
157 | ||
158 | if (!notify || gp == 0) | |
ed7c701e | 159 | exit(0); |
f3869107 BJ |
160 | clock = time(0); |
161 | localclock = localtime(&clock); | |
162 | ||
163 | if((f_utmp = fopen("/etc/utmp", "r")) == NULL) { | |
164 | msg("Cannot open /etc/utmp\n"); | |
165 | return; | |
166 | } | |
167 | ||
168 | nusers = 0; | |
169 | while (!feof(f_utmp)){ | |
170 | if (fread(&utmp, sizeof (struct utmp), 1, f_utmp) != 1) | |
171 | break; | |
172 | if (utmp.ut_name[0] == 0) | |
173 | continue; | |
174 | nusers++; | |
175 | for (np = gp->gr_mem; *np; np++){ | |
176 | if (strncmp(*np, utmp.ut_name, sizeof(utmp.ut_name)) != 0) | |
177 | continue; | |
178 | /* | |
179 | * Do not send messages to operators on dialups | |
180 | */ | |
181 | if (strncmp(utmp.ut_line, DIALUP, strlen(DIALUP)) == 0) | |
182 | continue; | |
183 | #ifdef DEBUG | |
184 | msg("Message to %s at %s\n", | |
185 | utmp.ut_name, utmp.ut_line); | |
186 | #endif DEBUG | |
187 | sendmes(utmp.ut_line, message); | |
188 | } | |
189 | } | |
190 | fclose(f_utmp); | |
191 | Exit(0); /* the wait in this same routine will catch this */ | |
192 | /* NOTREACHED */ | |
193 | } | |
194 | ||
195 | sendmes(tty, message) | |
196 | char *tty, *message; | |
197 | { | |
198 | char t[50], buf[BUFSIZ]; | |
199 | register char *cp; | |
200 | register int c, ch; | |
201 | int msize; | |
202 | FILE *f_tty; | |
203 | ||
204 | msize = strlen(message); | |
205 | strcpy(t, "/dev/"); | |
206 | strcat(t, tty); | |
207 | ||
208 | if((f_tty = fopen(t, "w")) != NULL) { | |
209 | setbuf(f_tty, buf); | |
210 | fprintf(f_tty, "\n\a\a\aMessage from the dump program to all operators at %d:%02d ...\r\n\n" | |
211 | ,localclock->tm_hour | |
212 | ,localclock->tm_min); | |
213 | for (cp = message, c = msize; c-- > 0; cp++) { | |
214 | ch = *cp; | |
215 | if (ch == '\n') | |
216 | putc('\r', f_tty); | |
217 | putc(ch, f_tty); | |
218 | } | |
219 | fclose(f_tty); | |
220 | } | |
221 | } | |
222 | ||
223 | /* | |
224 | * print out an estimate of the amount of time left to do the dump | |
225 | */ | |
226 | ||
227 | time_t tschedule = 0; | |
228 | ||
229 | timeest() | |
230 | { | |
231 | time_t tnow, deltat; | |
232 | ||
233 | time (&tnow); | |
234 | if (tnow >= tschedule){ | |
235 | tschedule = tnow + 300; | |
236 | if (blockswritten < 500) | |
237 | return; | |
238 | deltat = tstart_writing - tnow + | |
239 | (((1.0*(tnow - tstart_writing))/blockswritten) * esize); | |
240 | msg("%3.2f%% done, finished in %d:%02d\n", | |
241 | (blockswritten*100.0)/esize, | |
242 | deltat/3600, (deltat%3600)/60); | |
243 | } | |
244 | } | |
245 | ||
246 | int blocksontape() | |
247 | { | |
248 | /* | |
249 | * esize: total number of blocks estimated over all reels | |
250 | * blockswritten: blocks actually written, over all reels | |
251 | * etapes: estimated number of tapes to write | |
252 | * | |
253 | * tsize: blocks can write on this reel | |
254 | * asize: blocks written on this reel | |
255 | * tapeno: number of tapes written so far | |
256 | */ | |
257 | if (tapeno == etapes) | |
258 | return(esize - (etapes - 1)*tsize); | |
259 | return(tsize); | |
260 | } | |
261 | ||
262 | /* VARARGS1 */ | |
263 | /* ARGSUSED */ | |
264 | msg(fmt, a1, a2, a3, a4, a5) | |
265 | char *fmt; | |
266 | { | |
267 | fprintf(stderr," DUMP: "); | |
268 | #ifdef TDEBUG | |
269 | fprintf(stderr,"pid=%d ", getpid()); | |
270 | #endif | |
271 | fprintf(stderr, fmt, a1, a2, a3, a4, a5); | |
272 | fflush(stdout); | |
273 | fflush(stderr); | |
274 | } | |
275 | ||
276 | /* VARARGS1 */ | |
277 | /* ARGSUSED */ | |
278 | msgtail(fmt, a1, a2, a3, a4, a5) | |
279 | char *fmt; | |
280 | { | |
281 | fprintf(stderr, fmt, a1, a2, a3, a4, a5); | |
282 | } | |
283 | /* | |
284 | * Tell the operator what has to be done; | |
285 | * we don't actually do it | |
286 | */ | |
287 | ||
b33b7ff3 SL |
288 | struct fstab * |
289 | allocfsent(fs) | |
290 | register struct fstab *fs; | |
291 | { | |
292 | register struct fstab *new; | |
293 | register char *cp; | |
294 | char *malloc(); | |
295 | ||
296 | new = (struct fstab *)malloc(sizeof (*fs)); | |
297 | cp = malloc(strlen(fs->fs_file) + 1); | |
298 | strcpy(cp, fs->fs_file); | |
299 | new->fs_file = cp; | |
300 | cp = malloc(strlen(fs->fs_type) + 1); | |
301 | strcpy(cp, fs->fs_type); | |
302 | new->fs_type = cp; | |
303 | cp = malloc(strlen(fs->fs_spec) + 1); | |
304 | strcpy(cp, fs->fs_spec); | |
305 | new->fs_spec = cp; | |
306 | new->fs_passno = fs->fs_passno; | |
307 | new->fs_freq = fs->fs_freq; | |
308 | return (new); | |
309 | } | |
310 | ||
311 | struct pfstab { | |
312 | struct pfstab *pf_next; | |
313 | struct fstab *pf_fstab; | |
314 | }; | |
315 | ||
316 | static struct pfstab *table = NULL; | |
317 | ||
f3869107 BJ |
318 | getfstab() |
319 | { | |
b33b7ff3 SL |
320 | register struct fstab *fs; |
321 | register struct pfstab *pf; | |
f3869107 | 322 | |
9ba0a26f | 323 | if (setfsent() == 0) { |
f3869107 | 324 | msg("Can't open %s for dump table information.\n", FSTAB); |
b33b7ff3 SL |
325 | return; |
326 | } | |
327 | while (fs = getfsent()) { | |
328 | if (strcmp(fs->fs_type, FSTAB_RW) && | |
329 | strcmp(fs->fs_type, FSTAB_RO) && | |
330 | strcmp(fs->fs_type, FSTAB_RQ)) | |
331 | continue; | |
332 | fs = allocfsent(fs); | |
333 | pf = (struct pfstab *)malloc(sizeof (*pf)); | |
334 | pf->pf_fstab = fs; | |
335 | pf->pf_next = table; | |
336 | table = pf; | |
f3869107 | 337 | } |
b33b7ff3 | 338 | endfsent(); |
f3869107 BJ |
339 | } |
340 | ||
341 | /* | |
b33b7ff3 SL |
342 | * Search in the fstab for a file name. |
343 | * This file name can be either the special or the path file name. | |
f3869107 | 344 | * |
b33b7ff3 SL |
345 | * The entries in the fstab are the BLOCK special names, not the |
346 | * character special names. | |
347 | * The caller of fstabsearch assures that the character device | |
348 | * is dumped (that is much faster) | |
f3869107 | 349 | * |
b33b7ff3 | 350 | * The file name can omit the leading '/'. |
f3869107 | 351 | */ |
b33b7ff3 SL |
352 | struct fstab * |
353 | fstabsearch(key) | |
354 | char *key; | |
f3869107 | 355 | { |
b33b7ff3 SL |
356 | register struct pfstab *pf; |
357 | register struct fstab *fs; | |
b33b7ff3 | 358 | char *rawname(); |
f3869107 | 359 | |
b33b7ff3 SL |
360 | if (table == NULL) |
361 | return ((struct fstab *)0); | |
b33b7ff3 SL |
362 | for (pf = table; pf; pf = pf->pf_next) { |
363 | fs = pf->pf_fstab; | |
831e2afa | 364 | if (strcmp(fs->fs_file, key) == 0) |
b33b7ff3 | 365 | return (fs); |
831e2afa | 366 | if (strcmp(fs->fs_spec, key) == 0) |
b33b7ff3 | 367 | return (fs); |
831e2afa | 368 | if (strcmp(rawname(fs->fs_spec), key) == 0) |
b33b7ff3 | 369 | return (fs); |
f3869107 | 370 | if (key[0] != '/'){ |
b33b7ff3 | 371 | if (*fs->fs_spec == '/' && |
831e2afa | 372 | strcmp(fs->fs_spec + 1, key) == 0) |
b33b7ff3 SL |
373 | return (fs); |
374 | if (*fs->fs_file == '/' && | |
831e2afa | 375 | strcmp(fs->fs_file + 1, key) == 0) |
b33b7ff3 | 376 | return (fs); |
f3869107 BJ |
377 | } |
378 | } | |
b33b7ff3 | 379 | return (0); |
f3869107 BJ |
380 | } |
381 | ||
382 | /* | |
383 | * Tell the operator what to do | |
384 | */ | |
77db894d BJ |
385 | lastdump(arg) |
386 | char arg; /* w ==> just what to do; W ==> most recent dumps */ | |
f3869107 BJ |
387 | { |
388 | char *lastname; | |
389 | char *date; | |
390 | register int i; | |
391 | time_t tnow; | |
392 | register struct fstab *dt; | |
393 | int dumpme; | |
394 | register struct idates *itwalk; | |
395 | ||
396 | int idatesort(); | |
397 | ||
398 | time(&tnow); | |
399 | getfstab(); /* /etc/fstab input */ | |
400 | inititimes(); /* /etc/dumpdates input */ | |
401 | qsort(idatev, nidates, sizeof(struct idates *), idatesort); | |
402 | ||
77db894d BJ |
403 | if (arg == 'w') |
404 | fprintf(stdout, "Dump these file systems:\n"); | |
405 | else | |
406 | fprintf(stdout, "Last dump(s) done (Dump '>' file systems):\n"); | |
f3869107 BJ |
407 | lastname = "??"; |
408 | ITITERATE(i, itwalk){ | |
409 | if (strncmp(lastname, itwalk->id_name, sizeof(itwalk->id_name)) == 0) | |
410 | continue; | |
411 | date = (char *)ctime(&itwalk->id_ddate); | |
412 | date[16] = '\0'; /* blast away seconds and year */ | |
413 | lastname = itwalk->id_name; | |
414 | dt = fstabsearch(itwalk->id_name); | |
415 | dumpme = ( (dt != 0) | |
416 | && (dt->fs_freq != 0) | |
417 | && (itwalk->id_ddate < tnow - (dt->fs_freq*DAY))); | |
77db894d BJ |
418 | if ( (arg != 'w') || dumpme) |
419 | fprintf(stdout,"%c %8s\t(%6s) Last dump: Level %c, Date %s\n", | |
420 | dumpme && (arg != 'w') ? '>' : ' ', | |
f3869107 BJ |
421 | itwalk->id_name, |
422 | dt ? dt->fs_file : 0, | |
423 | itwalk->id_incno, | |
424 | date | |
425 | ); | |
426 | } | |
427 | } | |
428 | ||
429 | int idatesort(p1, p2) | |
430 | struct idates **p1, **p2; | |
431 | { | |
432 | int diff; | |
433 | ||
434 | diff = strncmp((*p1)->id_name, (*p2)->id_name, sizeof((*p1)->id_name)); | |
435 | if (diff == 0) | |
436 | return ((*p2)->id_ddate - (*p1)->id_ddate); | |
437 | else | |
438 | return (diff); | |
439 | } | |
440 | ||
441 | int max(a,b) | |
442 | { | |
443 | return(a>b?a:b); | |
444 | } | |
445 | int min(a,b) | |
446 | { | |
447 | return(a<b?a:b); | |
448 | } |