1 /* $OpenBSD: optr.c,v 1.40 2019/01/22 16:16:26 otto 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 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 /* ARGSUSED */ 132 void 133 alarmcatch(int signo) 134 { 135 int save_errno = errno; 136 137 if (notify == 0) { 138 if (timeout == 0) 139 (void) fprintf(stderr, 140 " DUMP: %s: (\"yes\" or \"no\") ", 141 attnmessage); 142 else 143 msgtail("\7\7"); 144 } else { 145 if (timeout) { 146 msgtail("\n"); 147 broadcast(""); /* just print last msg */ 148 } 149 (void) fprintf(stderr," DUMP: %s: (\"yes\" or \"no\") ", 150 attnmessage); 151 } 152 signal(SIGALRM, alarmcatch); 153 (void) alarm(120); 154 timeout = 1; 155 errno = save_errno; 156 } 157 158 /* 159 * Here if an inquisitive operator interrupts the dump program 160 */ 161 /* ARGSUSED */ 162 void 163 interrupt(int signo) 164 { 165 msg("Interrupt received.\n"); 166 if (query("Do you want to abort dump?")) 167 dumpabort(0); 168 } 169 170 /* 171 * We now use wall(1) to do the actual broadcasting. 172 */ 173 void 174 broadcast(char *message) 175 { 176 FILE *fp; 177 char buf[sizeof(_PATH_WALL) + sizeof(OPGRENT) + 3]; 178 179 if (!notify) 180 return; 181 182 (void)snprintf(buf, sizeof(buf), "%s -g %s", _PATH_WALL, OPGRENT); 183 if ((fp = popen(buf, "w")) == NULL) 184 return; 185 186 (void) fputs("\7\7\7Message from the dump program to all operators\n\nDUMP: NEEDS ATTENTION: ", fp); 187 if (lastmsg[0]) 188 (void) fputs(lastmsg, fp); 189 if (message[0]) 190 (void) fputs(message, fp); 191 192 (void) pclose(fp); 193 } 194 195 /* 196 * Print out an estimate of the amount of time left to do the dump 197 */ 198 199 time_t tschedule = 0; 200 201 void 202 timeest(void) 203 { 204 time_t tnow, deltat; 205 206 (void) time(&tnow); 207 if (tnow >= tschedule) { 208 tschedule = tnow + 300; 209 if (blockswritten < 500) 210 return; 211 deltat = tstart_writing - tnow + 212 (1.0 * (tnow - tstart_writing)) 213 / blockswritten * tapesize; 214 msg("%3.2f%% done, finished in %lld:%02lld\n", 215 (blockswritten * 100.0) / tapesize, 216 (long long)deltat / 3600, 217 ((long long)deltat % 3600) / 60); 218 } 219 } 220 221 void 222 msg(const char *fmt, ...) 223 { 224 va_list ap; 225 226 (void) fprintf(stderr," DUMP: "); 227 #ifdef TDEBUG 228 (void) fprintf(stderr, "pid=%d ", getpid()); 229 #endif 230 va_start(ap, fmt); 231 (void) vfprintf(stderr, fmt, ap); 232 va_end(ap); 233 (void) fflush(stdout); 234 (void) fflush(stderr); 235 va_start(ap, fmt); 236 (void) vsnprintf(lastmsg, sizeof(lastmsg), fmt, ap); 237 va_end(ap); 238 } 239 240 void 241 msgtail(const char *fmt, ...) 242 { 243 va_list ap; 244 245 va_start(ap, fmt); 246 (void) vfprintf(stderr, fmt, ap); 247 va_end(ap); 248 } 249 250 /* XXX signal races */ 251 void 252 quit(const char *fmt, ...) 253 { 254 va_list ap; 255 256 (void) fprintf(stderr," DUMP: "); 257 #ifdef TDEBUG 258 (void) fprintf(stderr, "pid=%d ", getpid()); 259 #endif 260 va_start(ap, fmt); 261 (void) vfprintf(stderr, fmt, ap); 262 va_end(ap); 263 (void) fflush(stdout); 264 (void) fflush(stderr); 265 dumpabort(0); 266 } 267 268 /* 269 * Tell the operator what has to be done; 270 * we don't actually do it 271 */ 272 273 struct fstab * 274 allocfsent(struct fstab *fs) 275 { 276 struct fstab *new; 277 278 new = malloc(sizeof(*fs)); 279 if (new == NULL || 280 (new->fs_file = strdup(fs->fs_file)) == NULL || 281 (new->fs_type = strdup(fs->fs_type)) == NULL || 282 (new->fs_spec = strdup(fs->fs_spec)) == NULL) 283 quit("%s\n", strerror(errno)); 284 new->fs_passno = fs->fs_passno; 285 new->fs_freq = fs->fs_freq; 286 return (new); 287 } 288 289 struct pfstab { 290 struct pfstab *pf_next; 291 struct fstab *pf_fstab; 292 }; 293 294 static struct pfstab *table; 295 296 void 297 getfstab(void) 298 { 299 struct fstab *fs; 300 struct pfstab *pf; 301 302 if (setfsent() == 0) { 303 msg("Can't open %s for dump table information: %s\n", 304 _PATH_FSTAB, strerror(errno)); 305 return; 306 } 307 while ((fs = getfsent()) != NULL) { 308 if (strcmp(fs->fs_vfstype, "ffs") && 309 strcmp(fs->fs_vfstype, "ufs")) 310 continue; 311 if (strcmp(fs->fs_type, FSTAB_RW) && 312 strcmp(fs->fs_type, FSTAB_RO) && 313 strcmp(fs->fs_type, FSTAB_RQ)) 314 continue; 315 fs = allocfsent(fs); 316 if ((pf = malloc(sizeof(*pf))) == NULL) 317 quit("%s\n", strerror(errno)); 318 pf->pf_fstab = fs; 319 pf->pf_next = table; 320 table = pf; 321 } 322 (void) endfsent(); 323 } 324 325 /* 326 * Search in the fstab for a file name. 327 * This file name can be either the special or the path file name. 328 * 329 * The entries in the fstab are the BLOCK special names, not the 330 * character special names. 331 * The caller of fstabsearch assures that the character device 332 * is dumped (that is much faster) 333 * 334 * The file name can omit the leading '/'. 335 */ 336 struct fstab * 337 fstabsearch(char *key) 338 { 339 struct pfstab *pf; 340 struct fstab *fs; 341 char *rn, *uid; 342 343 for (pf = table; pf != NULL; pf = pf->pf_next) { 344 fs = pf->pf_fstab; 345 if (strcmp(fs->fs_file, key) == 0 || 346 strcmp(fs->fs_spec, key) == 0) 347 return (fs); 348 rn = rawname(fs->fs_spec); 349 if (rn != NULL && strcmp(rn, key) == 0) 350 return (fs); 351 uid = getduid(rn != NULL ? rn : fs->fs_spec); 352 if (uid != NULL && strcmp(uid, key) == 0) { 353 free(uid); 354 return (fs); 355 } 356 free(uid); 357 if (key[0] != '/') { 358 if (*fs->fs_spec == '/' && 359 strcmp(fs->fs_spec + 1, key) == 0) 360 return (fs); 361 if (*fs->fs_file == '/' && 362 strcmp(fs->fs_file + 1, key) == 0) 363 return (fs); 364 } 365 } 366 return (NULL); 367 } 368 369 #define SECSPERDAY (24 * 60 * 60) 370 371 /* 372 * Tell the operator what to do 373 * w ==> just what to do; W ==> most recent dumps 374 */ 375 void 376 lastdump(int arg) 377 { 378 int i; 379 struct fstab *dt; 380 struct dumpdates *dtwalk; 381 char *lastname, *date; 382 int dumpme; 383 time_t tnow; 384 385 (void) time(&tnow); 386 getfstab(); /* /etc/fstab input */ 387 initdumptimes(); /* /etc/dumpdates input */ 388 qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort); 389 390 if (arg == 'w') 391 (void) printf("Dump these file systems:\n"); 392 else 393 (void) printf("Last dump(s) done (Dump '>' file systems):\n"); 394 lastname = "??"; 395 ITITERATE(i, dtwalk) { 396 if (strncmp(lastname, dtwalk->dd_name, 397 sizeof(dtwalk->dd_name)) == 0) 398 continue; 399 date = (char *)ctime(&dtwalk->dd_ddate); 400 date[16] = '\0'; /* blast away seconds and year */ 401 lastname = dtwalk->dd_name; 402 dt = fstabsearch(dtwalk->dd_name); 403 dumpme = (dt != NULL && 404 dt->fs_freq != 0 && 405 dtwalk->dd_ddate < tnow - (dt->fs_freq * SECSPERDAY)); 406 if (arg != 'w' || dumpme) 407 (void) printf( 408 "%c %8s\t(%6s) Last dump: Level %c, Date %s\n", 409 dumpme && (arg != 'w') ? '>' : ' ', 410 dtwalk->dd_name, 411 dt ? dt->fs_file : "", 412 dtwalk->dd_level, 413 date); 414 } 415 } 416 417 int 418 datesort(const void *a1, const void *a2) 419 { 420 struct dumpdates *d1 = *(struct dumpdates **)a1; 421 struct dumpdates *d2 = *(struct dumpdates **)a2; 422 int diff; 423 424 diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name)); 425 if (diff == 0) 426 return (d2->dd_ddate < d1->dd_ddate ? -1 : 427 (d2->dd_ddate > d1->dd_ddate ? 1 : 0)); 428 return (diff); 429 } 430