optr.c revision 1.11
1 /* $NetBSD: optr.c,v 1.11 1997/05/27 08:34:36 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)optr.c 8.2 (Berkeley) 1/6/94"; 39 #else 40 static char rcsid[] = "$NetBSD: optr.c,v 1.11 1997/05/27 08:34:36 mrg Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/wait.h> 46 #include <sys/time.h> 47 48 #include <errno.h> 49 #include <fstab.h> 50 #include <grp.h> 51 #include <signal.h> 52 #include <stdio.h> 53 #ifdef __STDC__ 54 #include <stdlib.h> 55 #include <string.h> 56 #include <stdarg.h> 57 #endif 58 #include <tzfile.h> 59 #ifdef __STDC__ 60 #include <unistd.h> 61 #endif 62 #include <utmp.h> 63 #ifndef __STDC__ 64 #include <varargs.h> 65 #endif 66 67 #include "dump.h" 68 #include "pathnames.h" 69 70 void alarmcatch __P((/* int, int */)); 71 int datesort __P((const void *, const void *)); 72 static void sendmes __P((char *, char *)); 73 74 /* 75 * Query the operator; This previously-fascist piece of code 76 * no longer requires an exact response. 77 * It is intended to protect dump aborting by inquisitive 78 * people banging on the console terminal to see what is 79 * happening which might cause dump to croak, destroying 80 * a large number of hours of work. 81 * 82 * Every 2 minutes we reprint the message, alerting others 83 * that dump needs attention. 84 */ 85 static int timeout; 86 static char *attnmessage; /* attention message */ 87 88 int 89 query(question) 90 char *question; 91 { 92 char replybuffer[64]; 93 int back, errcount; 94 FILE *mytty; 95 time_t firstprompt, when_answered; 96 97 firstprompt = time((time_t *)0); 98 99 if ((mytty = fopen(_PATH_TTY, "r")) == NULL) 100 quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno)); 101 attnmessage = question; 102 timeout = 0; 103 alarmcatch(); 104 back = -1; 105 errcount = 0; 106 do { 107 if (fgets(replybuffer, 63, mytty) == NULL) { 108 clearerr(mytty); 109 if (++errcount > 30) /* XXX ugly */ 110 quit("excessive operator query failures\n"); 111 } else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') { 112 back = 1; 113 } else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') { 114 back = 0; 115 } else { 116 (void) fprintf(stderr, 117 " DUMP: \"Yes\" or \"No\"?\n"); 118 (void) fprintf(stderr, 119 " DUMP: %s: (\"yes\" or \"no\") ", question); 120 } 121 } while (back < 0); 122 123 /* 124 * Turn off the alarm, and reset the signal to trap out.. 125 */ 126 (void) alarm(0); 127 if (signal(SIGALRM, sig) == SIG_IGN) 128 signal(SIGALRM, SIG_IGN); 129 (void) fclose(mytty); 130 when_answered = time((time_t *)0); 131 /* 132 * Adjust the base for time estimates to ignore time we spent waiting 133 * for operator input. 134 */ 135 if (tstart_writing != 0) 136 tstart_writing += (when_answered - firstprompt); 137 return(back); 138 } 139 140 char lastmsg[100]; 141 142 /* 143 * Alert the console operator, and enable the alarm clock to 144 * sleep for 2 minutes in case nobody comes to satisfy dump 145 */ 146 void 147 alarmcatch() 148 { 149 if (notify == 0) { 150 if (timeout == 0) 151 (void) fprintf(stderr, 152 " DUMP: %s: (\"yes\" or \"no\") ", 153 attnmessage); 154 else 155 msgtail("\7\7"); 156 } else { 157 if (timeout) { 158 msgtail("\n"); 159 broadcast(""); /* just print last msg */ 160 } 161 (void) fprintf(stderr," DUMP: %s: (\"yes\" or \"no\") ", 162 attnmessage); 163 } 164 signal(SIGALRM, alarmcatch); 165 (void) alarm(120); 166 timeout = 1; 167 } 168 169 /* 170 * Here if an inquisitive operator interrupts the dump program 171 */ 172 void 173 interrupt(signo) 174 int signo; 175 { 176 msg("Interrupt received.\n"); 177 if (query("Do you want to abort dump?")) 178 dumpabort(0); 179 } 180 181 /* 182 * The following variables and routines manage alerting 183 * operators to the status of dump. 184 * This works much like wall(1) does. 185 */ 186 struct group *gp; 187 188 /* 189 * Get the names from the group entry "operator" to notify. 190 */ 191 void 192 set_operators() 193 { 194 if (!notify) /*not going to notify*/ 195 return; 196 gp = getgrnam(OPGRENT); 197 (void) endgrent(); 198 if (gp == NULL) { 199 msg("No group entry for %s.\n", OPGRENT); 200 notify = 0; 201 return; 202 } 203 } 204 205 struct tm *localclock; 206 207 /* 208 * We fork a child to do the actual broadcasting, so 209 * that the process control groups are not messed up 210 */ 211 void 212 broadcast(message) 213 char *message; 214 { 215 time_t clock; 216 FILE *f_utmp; 217 struct utmp utmp; 218 char **np; 219 int pid, s; 220 221 if (!notify || gp == NULL) 222 return; 223 224 switch (pid = fork()) { 225 case -1: 226 return; 227 case 0: 228 break; 229 default: 230 while (wait(&s) != pid) 231 continue; 232 return; 233 } 234 235 clock = time((time_t *)0); 236 localclock = localtime(&clock); 237 238 if ((f_utmp = fopen(_PATH_UTMP, "r")) == NULL) { 239 msg("Cannot open %s: %s\n", _PATH_UTMP, strerror(errno)); 240 return; 241 } 242 243 while (!feof(f_utmp)) { 244 if (fread((char *) &utmp, sizeof (struct utmp), 1, f_utmp) != 1) 245 break; 246 if (utmp.ut_name[0] == 0) 247 continue; 248 for (np = gp->gr_mem; *np; np++) { 249 if (strncmp(*np, utmp.ut_name, sizeof(utmp.ut_name)) != 0) 250 continue; 251 /* 252 * Do not send messages to operators on dialups 253 */ 254 if (strncmp(utmp.ut_line, DIALUP, strlen(DIALUP)) == 0) 255 continue; 256 #ifdef DEBUG 257 msg("Message to %s at %s\n", *np, utmp.ut_line); 258 #endif 259 sendmes(utmp.ut_line, message); 260 } 261 } 262 (void) fclose(f_utmp); 263 Exit(0); /* the wait in this same routine will catch this */ 264 /* NOTREACHED */ 265 } 266 267 static void 268 sendmes(tty, message) 269 char *tty, *message; 270 { 271 char t[50], buf[BUFSIZ]; 272 char *cp; 273 int lmsg = 1; 274 FILE *f_tty; 275 276 (void)strncpy(t, _PATH_DEV, sizeof(t) - 1); 277 (void)strncat(t, tty, sizeof(t) - sizeof(_PATH_DEV) - 1); 278 t[sizeof(t) - 1] = '\0'; 279 280 if ((f_tty = fopen(t, "w")) != NULL) { 281 setbuf(f_tty, buf); 282 (void) fprintf(f_tty, 283 "\n\ 284 \7\7\7Message from the dump program to all operators at %d:%02d ...\r\n\n\ 285 DUMP: NEEDS ATTENTION: ", 286 localclock->tm_hour, localclock->tm_min); 287 for (cp = lastmsg; ; cp++) { 288 if (*cp == '\0') { 289 if (lmsg) { 290 cp = message; 291 if (*cp == '\0') 292 break; 293 lmsg = 0; 294 } else 295 break; 296 } 297 if (*cp == '\n') 298 (void) putc('\r', f_tty); 299 (void) putc(*cp, f_tty); 300 } 301 (void) fclose(f_tty); 302 } 303 } 304 305 /* 306 * print out an estimate of the amount of time left to do the dump 307 */ 308 309 time_t tschedule = 0; 310 311 void 312 timeest() 313 { 314 time_t tnow, deltat; 315 316 (void) time((time_t *) &tnow); 317 if (tnow >= tschedule) { 318 tschedule = tnow + 300; 319 if (blockswritten < 500) 320 return; 321 deltat = tstart_writing - tnow + 322 (1.0 * (tnow - tstart_writing)) 323 / blockswritten * tapesize; 324 msg("%3.2f%% done, finished in %d:%02d\n", 325 (blockswritten * 100.0) / tapesize, 326 deltat / 3600, (deltat % 3600) / 60); 327 } 328 } 329 330 void 331 #if __STDC__ 332 msg(const char *fmt, ...) 333 #else 334 msg(fmt, va_alist) 335 char *fmt; 336 va_dcl 337 #endif 338 { 339 va_list ap; 340 341 (void) fprintf(stderr," DUMP: "); 342 #ifdef TDEBUG 343 (void) fprintf(stderr, "pid=%d ", getpid()); 344 #endif 345 #if __STDC__ 346 va_start(ap, fmt); 347 #else 348 va_start(ap); 349 #endif 350 (void) vfprintf(stderr, fmt, ap); 351 (void) fflush(stdout); 352 (void) fflush(stderr); 353 (void) vsnprintf(lastmsg, sizeof lastmsg, fmt, ap); 354 va_end(ap); 355 } 356 357 void 358 #if __STDC__ 359 msgtail(const char *fmt, ...) 360 #else 361 msgtail(fmt, va_alist) 362 char *fmt; 363 va_dcl 364 #endif 365 { 366 va_list ap; 367 #if __STDC__ 368 va_start(ap, fmt); 369 #else 370 va_start(ap); 371 #endif 372 (void) vfprintf(stderr, fmt, ap); 373 va_end(ap); 374 } 375 376 void 377 #if __STDC__ 378 quit(const char *fmt, ...) 379 #else 380 quit(fmt, va_alist) 381 char *fmt; 382 va_dcl 383 #endif 384 { 385 va_list ap; 386 387 (void) fprintf(stderr," DUMP: "); 388 #ifdef TDEBUG 389 (void) fprintf(stderr, "pid=%d ", getpid()); 390 #endif 391 #if __STDC__ 392 va_start(ap, fmt); 393 #else 394 va_start(ap); 395 #endif 396 (void) vfprintf(stderr, fmt, ap); 397 va_end(ap); 398 (void) fflush(stdout); 399 (void) fflush(stderr); 400 dumpabort(0); 401 } 402 403 /* 404 * Tell the operator what has to be done; 405 * we don't actually do it 406 */ 407 408 struct fstab * 409 allocfsent(fs) 410 struct fstab *fs; 411 { 412 struct fstab *new; 413 414 new = (struct fstab *)malloc(sizeof (*fs)); 415 if (new == NULL || 416 (new->fs_file = strdup(fs->fs_file)) == NULL || 417 (new->fs_type = strdup(fs->fs_type)) == NULL || 418 (new->fs_spec = strdup(fs->fs_spec)) == NULL) 419 quit("%s\n", strerror(errno)); 420 new->fs_passno = fs->fs_passno; 421 new->fs_freq = fs->fs_freq; 422 return (new); 423 } 424 425 struct pfstab { 426 struct pfstab *pf_next; 427 struct fstab *pf_fstab; 428 }; 429 430 static struct pfstab *table; 431 432 void 433 getfstab() 434 { 435 struct fstab *fs; 436 struct pfstab *pf; 437 438 if (setfsent() == 0) { 439 msg("Can't open %s for dump table information: %s\n", 440 _PATH_FSTAB, strerror(errno)); 441 return; 442 } 443 while ((fs = getfsent()) != NULL) { 444 if (strcmp(fs->fs_type, FSTAB_RW) && 445 strcmp(fs->fs_type, FSTAB_RO) && 446 strcmp(fs->fs_type, FSTAB_RQ)) 447 continue; 448 if (strcmp(fs->fs_vfstype, "ufs") && 449 strcmp(fs->fs_vfstype, "ffs")) 450 continue; 451 fs = allocfsent(fs); 452 if ((pf = (struct pfstab *)malloc(sizeof (*pf))) == NULL) 453 quit("%s\n", strerror(errno)); 454 pf->pf_fstab = fs; 455 pf->pf_next = table; 456 table = pf; 457 } 458 (void) endfsent(); 459 } 460 461 /* 462 * Search in the fstab for a file name. 463 * This file name can be either the special or the path file name. 464 * 465 * The entries in the fstab are the BLOCK special names, not the 466 * character special names. 467 * The caller of fstabsearch assures that the character device 468 * is dumped (that is much faster) 469 * 470 * The file name can omit the leading '/'. 471 */ 472 struct fstab * 473 fstabsearch(key) 474 char *key; 475 { 476 struct pfstab *pf; 477 struct fstab *fs; 478 char *rn; 479 480 for (pf = table; pf != NULL; pf = pf->pf_next) { 481 fs = pf->pf_fstab; 482 if (strcmp(fs->fs_file, key) == 0 || 483 strcmp(fs->fs_spec, key) == 0) 484 return (fs); 485 rn = rawname(fs->fs_spec); 486 if (rn != NULL && strcmp(rn, key) == 0) 487 return (fs); 488 if (key[0] != '/') { 489 if (*fs->fs_spec == '/' && 490 strcmp(fs->fs_spec + 1, key) == 0) 491 return (fs); 492 if (*fs->fs_file == '/' && 493 strcmp(fs->fs_file + 1, key) == 0) 494 return (fs); 495 } 496 } 497 return (NULL); 498 } 499 500 /* 501 * Tell the operator what to do 502 */ 503 void 504 lastdump(arg) 505 char arg; /* w ==> just what to do; W ==> most recent dumps */ 506 { 507 int i; 508 struct fstab *dt; 509 struct dumpdates *dtwalk; 510 char *lastname, *date; 511 int dumpme; 512 time_t tnow; 513 514 (void) time(&tnow); 515 getfstab(); /* /etc/fstab input */ 516 initdumptimes(); /* /etc/dumpdates input */ 517 qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort); 518 519 if (arg == 'w') 520 (void) printf("Dump these file systems:\n"); 521 else 522 (void) printf("Last dump(s) done (Dump '>' file systems):\n"); 523 lastname = "??"; 524 ITITERATE(i, dtwalk) { 525 if (strncmp(lastname, dtwalk->dd_name, 526 sizeof(dtwalk->dd_name)) == 0) 527 continue; 528 date = (char *)ctime(&dtwalk->dd_ddate); 529 date[24] = '\0'; 530 strcpy(date + 16, date + 19); /* blast away seconds */ 531 lastname = dtwalk->dd_name; 532 dt = fstabsearch(dtwalk->dd_name); 533 dumpme = (dt != NULL && 534 dt->fs_freq != 0 && 535 dtwalk->dd_ddate < tnow - (dt->fs_freq * SECSPERDAY)); 536 if (arg != 'w' || dumpme) 537 (void) printf( 538 "%c %8s\t(%6s) Last dump: Level %c, Date %s\n", 539 dumpme && (arg != 'w') ? '>' : ' ', 540 dtwalk->dd_name, 541 dt ? dt->fs_file : "", 542 dtwalk->dd_level, 543 date); 544 } 545 } 546 547 int 548 datesort(a1, a2) 549 const void *a1, *a2; 550 { 551 struct dumpdates *d1 = *(struct dumpdates **)a1; 552 struct dumpdates *d2 = *(struct dumpdates **)a2; 553 int diff; 554 555 diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name)); 556 if (diff == 0) 557 return (d2->dd_ddate - d1->dd_ddate); 558 return (diff); 559 } 560
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