1 /* $NetBSD: optr.c,v 1.36 2006/12/18 20:07:32 christos 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)optr.c 8.2 (Berkeley) 1/6/94"; 36 #else 37 __RCSID("$NetBSD: optr.c,v 1.36 2006/12/18 20:07:32 christos Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/queue.h> 43 #include <sys/wait.h> 44 #include <sys/time.h> 45 #include <sys/ucred.h> 46 #include <sys/mount.h> 47 48 #include <errno.h> 49 #include <fstab.h> 50 #include <grp.h> 51 #include <signal.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <stdarg.h> 56 #include <time.h> 57 #include <tzfile.h> 58 #include <unistd.h> 59 60 #include <ufs/ufs/dinode.h> 61 62 #include "dump.h" 63 #include "pathnames.h" 64 65 void alarmcatch(int); 66 struct fstab *allocfsent(struct fstab *); 67 int datesort(const void *, const void *); 68 extern char *time_string; 69 extern char default_time_string[]; 70 71 static void do_timestamp(time_t, const char *); 72 73 /* 74 * Query the operator; This previously-fascist piece of code 75 * no longer requires an exact response. 76 * It is intended to protect dump aborting by inquisitive 77 * people banging on the console terminal to see what is 78 * happening which might cause dump to croak, destroying 79 * a large number of hours of work. 80 * 81 * Every 2 minutes we reprint the message, alerting others 82 * that dump needs attention. 83 */ 84 static int timeout; 85 static const char *attnmessage; /* attention message */ 86 87 int 88 query(const char *question) 89 { 90 char replybuffer[64]; 91 int back, errcount; 92 FILE *mytty; 93 time_t firstprompt, when_answered; 94 95 firstprompt = time((time_t *)0); 96 97 if ((mytty = fopen(_PATH_TTY, "r")) == NULL) 98 quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno)); 99 attnmessage = question; 100 timeout = 0; 101 alarmcatch(0); 102 back = -1; 103 errcount = 0; 104 do { 105 if (fgets(replybuffer, 63, mytty) == NULL) { 106 clearerr(mytty); 107 if (++errcount > 30) /* XXX ugly */ 108 quit("excessive operator query failures\n"); 109 } else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') { 110 back = 1; 111 } else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') { 112 back = 0; 113 } else { 114 (void) fprintf(stderr, 115 " DUMP: \"Yes\" or \"No\"?\n"); 116 (void) fprintf(stderr, 117 " DUMP: %s: (\"yes\" or \"no\") ", question); 118 } 119 } while (back < 0); 120 121 /* 122 * Turn off the alarm, and reset the signal to trap out.. 123 */ 124 (void) alarm(0); 125 if (signal(SIGALRM, sig) == SIG_IGN) 126 signal(SIGALRM, SIG_IGN); 127 (void) fclose(mytty); 128 when_answered = time((time_t *)0); 129 /* 130 * Adjust the base for time estimates to ignore time we spent waiting 131 * for operator input. 132 */ 133 if (tstart_writing != 0) 134 tstart_writing += (when_answered - firstprompt); 135 if (tstart_volume != 0) 136 tstart_volume += (when_answered - firstprompt); 137 return(back); 138 } 139 140 char lastmsg[200]; 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(int dummy __unused) 148 { 149 150 if (notify == 0) { 151 if (timeout == 0) 152 (void) fprintf(stderr, 153 " DUMP: %s: (\"yes\" or \"no\") ", 154 attnmessage); 155 else 156 msgtail("\a\a"); 157 } else { 158 if (timeout) { 159 msgtail("\n"); 160 broadcast(""); /* just print last msg */ 161 } 162 (void) fprintf(stderr," DUMP: %s: (\"yes\" or \"no\") ", 163 attnmessage); 164 } 165 signal(SIGALRM, alarmcatch); 166 (void) alarm(120); 167 timeout = 1; 168 } 169 170 /* 171 * Here if an inquisitive operator interrupts the dump program 172 */ 173 void 174 interrupt(int signo __unused) 175 { 176 int errno_save; 177 178 errno_save = errno; 179 msg("Interrupt received.\n"); 180 if (query("Do you want to abort dump?")) 181 dumpabort(0); 182 errno = errno_save; 183 } 184 185 /* 186 * Use wall(1) "-g operator" to do the actual broadcasting. 187 */ 188 void 189 broadcast(const char *message) 190 { 191 FILE *fp; 192 char buf[sizeof(_PATH_WALL) + sizeof(OPGRENT) + 3]; 193 194 if (!notify) 195 return; 196 197 (void)snprintf(buf, sizeof(buf), "%s -g %s", _PATH_WALL, OPGRENT); 198 if ((fp = popen(buf, "w")) == NULL) 199 return; 200 201 (void) fputs("\a\a\aMessage from the dump program to all operators\n\nDUMP: NEEDS ATTENTION: ", fp); 202 if (lastmsg[0]) 203 (void) fputs(lastmsg, fp); 204 if (message[0]) 205 (void) fputs(message, fp); 206 207 (void) pclose(fp); 208 } 209 210 /* 211 * print out the timestamp string to stderr. 212 */ 213 #define STAMP_LENGTH 80 214 215 static void 216 do_timestamp(time_t thistime, const char *message) 217 { 218 struct tm tm_time; 219 char then[STAMP_LENGTH + 1]; 220 221 (void) localtime_r(&thistime, &tm_time); 222 if (strftime(then, STAMP_LENGTH, time_string, &tm_time) == 0) { 223 time_string = default_time_string; 224 strftime(then, STAMP_LENGTH, time_string, &tm_time); 225 fprintf(stderr, 226 "DUMP: ERROR: TIMEFORMAT too long, reverting to default\n"); 227 } 228 229 fprintf(stderr, message, then); 230 } 231 232 233 /* 234 * print out an estimate of the amount of time left to do the dump 235 */ 236 237 time_t tschedule = 0; 238 239 void 240 timeest(void) 241 { 242 time_t tnow, deltat; 243 244 (void) time((time_t *) &tnow); 245 if (tnow >= tschedule) { 246 tschedule = tnow + 300; 247 if (blockswritten < 500) 248 return; 249 deltat = tstart_writing - tnow + 250 (1.0 * (tnow - tstart_writing)) 251 / blockswritten * tapesize; 252 253 msg("%3.2f%% done, finished in %ld:%02ld", 254 (blockswritten * 100.0) / tapesize, 255 (long)(deltat / 3600), (long)((deltat % 3600) / 60)); 256 257 if (timestamp == 1) 258 do_timestamp(tnow + deltat, " (at %s)"); 259 260 fprintf(stderr, "\n"); 261 } 262 } 263 264 void 265 msg(const char *fmt, ...) 266 { 267 time_t tnow; 268 va_list ap; 269 270 fprintf(stderr, " "); 271 if (timestamp == 1) { 272 (void) time((time_t *) &tnow); 273 do_timestamp(tnow, "[%s] "); 274 } 275 276 (void) fprintf(stderr,"DUMP: "); 277 #ifdef TDEBUG 278 (void) fprintf(stderr, "pid=%d ", getpid()); 279 #endif 280 va_start(ap, fmt); 281 (void) vsnprintf(lastmsg, sizeof lastmsg, fmt, ap); 282 fputs(lastmsg, stderr); 283 (void) fflush(stdout); 284 (void) fflush(stderr); 285 va_end(ap); 286 } 287 288 void 289 msgtail(const char *fmt, ...) 290 { 291 va_list ap; 292 293 va_start(ap, fmt); 294 (void) vfprintf(stderr, fmt, ap); 295 va_end(ap); 296 } 297 298 void 299 quit(const char *fmt, ...) 300 { 301 va_list ap; 302 303 (void) fprintf(stderr," DUMP: "); 304 #ifdef TDEBUG 305 (void) fprintf(stderr, "pid=%d ", getpid()); 306 #endif 307 va_start(ap, fmt); 308 (void) vfprintf(stderr, fmt, ap); 309 va_end(ap); 310 (void) fflush(stdout); 311 (void) fflush(stderr); 312 dumpabort(0); 313 } 314 315 /* 316 * Tell the operator what has to be done; 317 * we don't actually do it 318 */ 319 320 struct fstab * 321 allocfsent(struct fstab *fs) 322 { 323 struct fstab *new; 324 325 new = (struct fstab *)xmalloc(sizeof (*fs)); 326 new->fs_file = xstrdup(fs->fs_file); 327 new->fs_type = xstrdup(fs->fs_type); 328 new->fs_spec = xstrdup(fs->fs_spec); 329 new->fs_passno = fs->fs_passno; 330 new->fs_freq = fs->fs_freq; 331 return (new); 332 } 333 334 struct pfstab { 335 SLIST_ENTRY(pfstab) pf_list; 336 struct fstab *pf_fstab; 337 }; 338 339 static SLIST_HEAD(, pfstab) table; 340 341 void 342 getfstab(void) 343 { 344 struct fstab *fs; 345 struct pfstab *pf; 346 347 if (setfsent() == 0) { 348 msg("Can't open %s for dump table information: %s\n", 349 _PATH_FSTAB, strerror(errno)); 350 return; 351 } 352 while ((fs = getfsent()) != NULL) { 353 if (strcmp(fs->fs_type, FSTAB_RW) && 354 strcmp(fs->fs_type, FSTAB_RO) && 355 strcmp(fs->fs_type, FSTAB_RQ)) 356 continue; 357 #ifdef DUMP_LFS 358 if (strcmp(fs->fs_vfstype, "lfs")) 359 continue; 360 #else 361 if (strcmp(fs->fs_vfstype, "ufs") && 362 strcmp(fs->fs_vfstype, "ffs")) 363 continue; 364 #endif 365 fs = allocfsent(fs); 366 pf = (struct pfstab *)xmalloc(sizeof (*pf)); 367 pf->pf_fstab = fs; 368 SLIST_INSERT_HEAD(&table, pf, pf_list); 369 } 370 (void) endfsent(); 371 } 372 373 /* 374 * Search in the fstab for a file name. 375 * This file name can be either the special or the path file name. 376 * 377 * The entries in the fstab are the BLOCK special names, not the 378 * character special names. 379 * The caller of fstabsearch assures that the character device 380 * is dumped (that is much faster) 381 * 382 * The file name can omit the leading '/'. 383 */ 384 struct fstab * 385 fstabsearch(const char *key) 386 { 387 struct pfstab *pf; 388 struct fstab *fs; 389 char *rn; 390 391 SLIST_FOREACH(pf, &table, pf_list) { 392 fs = pf->pf_fstab; 393 if (strcmp(fs->fs_file, key) == 0 || 394 strcmp(fs->fs_spec, key) == 0) 395 return (fs); 396 rn = rawname(fs->fs_spec); 397 if (rn != NULL && strcmp(rn, key) == 0) 398 return (fs); 399 if (key[0] != '/') { 400 if (*fs->fs_spec == '/' && 401 strcmp(fs->fs_spec + 1, key) == 0) 402 return (fs); 403 if (*fs->fs_file == '/' && 404 strcmp(fs->fs_file + 1, key) == 0) 405 return (fs); 406 } 407 } 408 return (NULL); 409 } 410 411 /* 412 * Search in the mounted file list for a file name. 413 * This file name can be either the special or the path file name. 414 * 415 * The entries in the list are the BLOCK special names, not the 416 * character special names. 417 * The caller of mntinfosearch assures that the character device 418 * is dumped (that is much faster) 419 */ 420 struct statvfs * 421 mntinfosearch(const char *key) 422 { 423 int i, mntbufc; 424 struct statvfs *mntbuf, *fs; 425 char *rn; 426 427 if ((mntbufc = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 428 quit("Can't get mount list: %s", strerror(errno)); 429 for (fs = mntbuf, i = 0; i < mntbufc; i++, fs++) { 430 #ifdef DUMP_LFS 431 if (strcmp(fs->f_fstypename, "lfs") != 0) 432 continue; 433 #else /* ! DUMP_LFS */ 434 if (strcmp(fs->f_fstypename, "ufs") != 0 && 435 strcmp(fs->f_fstypename, "ffs") != 0) 436 continue; 437 #endif /* ! DUMP_LFS */ 438 if (strcmp(fs->f_mntonname, key) == 0 || 439 strcmp(fs->f_mntfromname, key) == 0) 440 return (fs); 441 rn = rawname(fs->f_mntfromname); 442 if (rn != NULL && strcmp(rn, key) == 0) 443 return (fs); 444 } 445 return (NULL); 446 } 447 448 449 /* 450 * Tell the operator what to do. 451 * arg: w ==> just what to do; W ==> most recent dumps 452 */ 453 void 454 lastdump(char arg) 455 { 456 int i; 457 struct fstab *dt; 458 struct dumpdates *dtwalk; 459 char *date; 460 const char *lastname; 461 int dumpme; 462 time_t tnow; 463 464 (void) time(&tnow); 465 getfstab(); /* /etc/fstab input */ 466 initdumptimes(); /* /etc/dumpdates input */ 467 qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort); 468 469 if (arg == 'w') 470 (void) printf("Dump these file systems:\n"); 471 else 472 (void) printf("Last dump(s) done (Dump '>' file systems):\n"); 473 lastname = "??"; 474 ITITERATE(i, dtwalk) { 475 if (strncmp(lastname, dtwalk->dd_name, 476 sizeof(dtwalk->dd_name)) == 0) 477 continue; 478 date = (char *)ctime(&dtwalk->dd_ddate); 479 date[24] = '\0'; 480 strcpy(date + 16, date + 19); /* blast away seconds */ 481 lastname = dtwalk->dd_name; 482 dt = fstabsearch(dtwalk->dd_name); 483 dumpme = (dt != NULL && 484 dt->fs_freq != 0 && 485 dtwalk->dd_ddate < tnow - (dt->fs_freq * SECSPERDAY)); 486 if (arg != 'w' || dumpme) 487 (void) printf( 488 "%c %8s\t(%6s) Last dump: Level %c, Date %s\n", 489 dumpme && (arg != 'w') ? '>' : ' ', 490 dtwalk->dd_name, 491 dt ? dt->fs_file : "", 492 dtwalk->dd_level, 493 date); 494 } 495 } 496 497 int 498 datesort(const void *a1, const void *a2) 499 { 500 const struct dumpdates *d1 = *(const struct dumpdates *const *)a1; 501 const struct dumpdates *d2 = *(const struct dumpdates *const *)a2; 502 int diff; 503 504 diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name)); 505 if (diff == 0) 506 return (d2->dd_ddate - d1->dd_ddate); 507 return (diff); 508 } 509