dump/optr.c

   1 /*
   2  *      Ported to Linux's Second Extended File System as part of the
   3  *      dump and restore backup suit
   4  *      Remy Card <card@Linux.EU.Org>, 1994-1997
   5  *      Stelian Pop <stelian@popies.net>, 1999-2000
   6  *      Stelian Pop <stelian@popies.net> - Alcôve <www.alcove.com>, 2000-2002
   7  */
   8
   9 /*-
  10  * Copyright (c) 1980, 1988, 1993
  11  *      The Regents of the University of California.  All rights reserved.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgement:
  23  *      This product includes software developed by the University of
  24  *      California, Berkeley and its contributors.
  25  * 4. Neither the name of the University nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  */
  41
  42 #ifndef lint
  43 static const char rcsid[] =
  44         "$Id: optr.c,v 1.33 2002/12/12 11:49:35 stelian Exp $";
  45 #endif /* not lint */
  46
  47 #include <config.h>
  48 #include <sys/param.h>
  49 #include <sys/wait.h>
  50 #include <sys/time.h>
  51 #include <time.h>
  52
  53 #include <errno.h>
  54 #include <mntent.h>
  55 #include <paths.h>
  56 #include <grp.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <stdarg.h>
  61 #include <unistd.h>
  62 #include <utmp.h>
  63 #include <sys/stat.h>
  64
  65 #ifdef __linux__
  66 #ifdef HAVE_EXT2FS_EXT2_FS_H
  67 #include <ext2fs/ext2_fs.h>
  68 #else
  69 #include <linux/ext2_fs.h>
  70 #endif
  71 #include <ext2fs/ext2fs.h>
  72 #include <bsdcompat.h>
  73 #include <signal.h>
  74 #endif
  75
  76 #include "dump.h"
  77 #include "pathnames.h"
  78 #include "bylabel.h"
  79
  80 static  void alarmcatch __P((int));
  81 int     datesort __P((const void *, const void *));
  82 static  void sendmes __P((const char *, const char *));
  83
  84 /* List of filesystem types that we can dump (same ext2 on-disk format) */
  85 static char *fstypes[] = { "ext2", "ext3", "InterMezzo", NULL };
  86
  87 /*
  88  *      Query the operator; This previously-fascist piece of code
  89  *      no longer requires an exact response.
  90  *      It is intended to protect dump aborting by inquisitive
  91  *      people banging on the console terminal to see what is
  92  *      happening which might cause dump to croak, destroying
  93  *      a large number of hours of work.
  94  *
  95  *      Every 2 minutes we reprint the message, alerting others
  96  *      that dump needs attention.
  97  */
  98 static  int timeout;
  99 static  const char *attnmessage;                /* attention message */
 100
 101 int
 102 query(const char *question)
 103 {
 104         char    replybuffer[64];
 105         int     back, errcount;
 106         FILE    *mytty;
 107         time_t  firstprompt, when_answered;
 108
 109         if (qflag) {
 110                 msg("%s - forced abort\n", question);
 111                 dumpabort(0);
 112                 /* NOTREACHED */
 113         }
 114
 115         firstprompt = time(NULL);
 116
 117         if ((mytty = fopen(_PATH_TTY, "r")) == NULL)
 118                 quit("fopen on %s fails: %s\n", _PATH_TTY, strerror(errno));
 119         attnmessage = question;
 120         timeout = 0;
 121         alarmcatch(0);
 122         back = -1;
 123         errcount = 0;
 124         do {
 125                 if (fgets(replybuffer, 63, mytty) == NULL) {
 126                         clearerr(mytty);
 127                         if (++errcount > 30)    /* XXX  ugly */
 128                                 quit("excessive operator query failures\n");
 129                 } else if (replybuffer[0] == 'y' || replybuffer[0] == 'Y') {
 130                         back = 1;
 131                 } else if (replybuffer[0] == 'n' || replybuffer[0] == 'N') {
 132                         back = 0;
 133                 } else {
 134                         (void) fprintf(stderr,
 135                             "  DUMP: \"Yes\" or \"No\"?\n");
 136                         (void) fprintf(stderr,
 137                             "  DUMP: %s: (\"yes\" or \"no\") ", question);
 138                 }
 139         } while (back < 0);
 140
 141         /*
 142          *      Turn off the alarm, and reset the signal to trap out..
 143          */
 144         (void) alarm(0);
 145         if (signal(SIGALRM, sig) == SIG_IGN)
 146                 signal(SIGALRM, SIG_IGN);
 147         (void) fclose(mytty);
 148         when_answered = time(NULL);
 149         /*
 150          * Adjust the base for time estimates to ignore time we spent waiting
 151          * for operator input.
 152          */
 153         if (tstart_writing != 0)
 154                 tstart_writing += (when_answered - firstprompt);
 155         return(back);
 156 }
 157
 158 char lastmsg[BUFSIZ];
 159
 160 /*
 161  *      Alert the console operator, and enable the alarm clock to
 162  *      sleep for 2 minutes in case nobody comes to satisfy dump
 163  */
 164 static void
 165 alarmcatch(UNUSED(int signo))
 166 {
 167         int save_errno = errno;
 168         if (notify == 0) {
 169                 if (timeout == 0)
 170                         (void) fprintf(stderr,
 171                             "  DUMP: %s: (\"yes\" or \"no\") ",
 172                             attnmessage);
 173                 else
 174                         msgtail("\7\7");
 175         } else {
 176                 if (timeout) {
 177                         msgtail("\n");
 178                         broadcast("");          /* just print last msg */
 179                 }
 180                 (void) fprintf(stderr,"  DUMP: %s: (\"yes\" or \"no\") ",
 181                     attnmessage);
 182         }
 183         signal(SIGALRM, alarmcatch);
 184         (void) alarm(120);
 185         timeout = 1;
 186         errno = save_errno;
 187 }
 188
 189 /*
 190  *      Here if an inquisitive operator interrupts the dump program
 191  */
 192 void
 193 interrupt(UNUSED(int signo))
 194 {
 195         msg("Interrupt received.\n");
 196         if (query("Do you want to abort dump?"))
 197                 dumpabort(0);
 198 }
 199
 200 /*
 201  *      The following variables and routines manage alerting
 202  *      operators to the status of dump.
 203  *      This works much like wall(1) does.
 204  */
 205 struct  group *gp;
 206
 207 /*
 208  *      Get the names from the group entry "operator" to notify.
 209  */
 210 void
 211 set_operators(void)
 212 {
 213         if (!notify)            /*not going to notify*/
 214                 return;
 215         gp = getgrnam(OPGRENT);
 216         (void) endgrent();
 217         if (gp == NULL) {
 218                 msg("No group entry for %s.\n", OPGRENT);
 219                 notify = 0;
 220                 return;
 221         }
 222 }
 223
 224 struct tm *localclock;
 225
 226 /*
 227  *      We fork a child to do the actual broadcasting, so
 228  *      that the process control groups are not messed up
 229  */
 230 void
 231 broadcast(const char *message)
 232 {
 233         time_t          clock;
 234         FILE    *f_utmp;
 235         struct  utmp    utmp;
 236         char    **np;
 237         int     pid, s;
 238
 239         if (!notify || gp == NULL)
 240                 return;
 241
 242         switch (pid = fork()) {
 243         case -1:
 244                 return;
 245         case 0:
 246                 break;
 247         default:
 248                 while (wait(&s) != pid)
 249                         continue;
 250                 return;
 251         }
 252
 253         clock = time(NULL);
 254         localclock = localtime(&clock);
 255
 256         if ((f_utmp = fopen(_PATH_UTMP, "r")) == NULL) {
 257                 msg("Cannot open %s: %s\n", _PATH_UTMP, strerror(errno));
 258                 return;
 259         }
 260
 261         while (!feof(f_utmp)) {
 262                 if (fread((char *) &utmp, sizeof (struct utmp), 1, f_utmp) != 1)
 263                         break;
 264                 if (utmp.ut_name[0] == 0)
 265                         continue;
 266                 for (np = gp->gr_mem; *np; np++) {
 267                         if (strncmp(*np, utmp.ut_name, sizeof(utmp.ut_name)) != 0)
 268                                 continue;
 269                         /*
 270                          *      Do not send messages to operators on dialups
 271                          */
 272                         if (strncmp(utmp.ut_line, DIALUP, strlen(DIALUP)) == 0)
 273                                 continue;
 274 #ifdef DEBUG
 275                         msg("Message to %s at %s\n", *np, utmp.ut_line);
 276 #endif
 277                         sendmes(utmp.ut_line, message);
 278                 }
 279         }
 280         (void) fclose(f_utmp);
 281         Exit(0);        /* the wait in this same routine will catch this */
 282         /* NOTREACHED */
 283 }
 284
 285 static void
 286 sendmes(const char *tty, const char *message)
 287 {
 288         char t[MAXPATHLEN], buf[BUFSIZ];
 289         const char *cp;
 290         int lmsg = 1;
 291         FILE *f_tty;
 292
 293         (void) strcpy(t, _PATH_DEV);
 294         (void) strncat(t, tty, sizeof t - strlen(_PATH_DEV) - 1);
 295
 296         if ((f_tty = fopen(t, "w")) != NULL) {
 297                 setbuf(f_tty, buf);
 298                 (void) fprintf(f_tty,
 299                     "\n\
 300 \7\7\7Message from the dump program to all operators at %d:%02d ...\r\n\n\
 301 DUMP: NEEDS ATTENTION: ",
 302                     localclock->tm_hour, localclock->tm_min);
 303                 for (cp = lastmsg; ; cp++) {
 304                         if (*cp == '\0') {
 305                                 if (lmsg) {
 306                                         cp = message;
 307                                         if (!(cp && *cp != '\0'))
 308                                                 break;
 309                                         lmsg = 0;
 310                                 } else
 311                                         break;
 312                         }
 313                         if (*cp == '\n')
 314                                 (void) putc('\r', f_tty);
 315                         (void) putc(*cp, f_tty);
 316                 }
 317                 (void) fclose(f_tty);
 318         }
 319 }
 320
 321 /*
 322  *      print out an estimate of the amount of time left to do the dump
 323  */
 324
 325 time_t  tschedule = 0;
 326
 327 void
 328 timeest(void)
 329 {
 330         time_t tnow = time(NULL);
 331
 332         if (tnow >= tschedule) {
 333                 char *buf = mktimeest(tnow);
 334                 tschedule = tnow + 300;
 335                 if (buf) {
 336                         fprintf(stderr, "  DUMP: ");
 337                         fwrite(buf, strlen(buf), 1, stderr);
 338                         fflush(stderr);
 339                 }
 340         }
 341 }
 342
 343 void
 344 #ifdef __STDC__
 345 msg(const char *fmt, ...)
 346 #else
 347 msg(fmt, va_alist)
 348         char *fmt;
 349         va_dcl
 350 #endif
 351 {
 352         va_list ap;
 353
 354         (void) fprintf(stderr,"  DUMP: ");
 355 #ifdef TDEBUG
 356         (void) fprintf(stderr, "pid=%d ", getpid());
 357 #endif
 358 #ifdef __STDC__
 359         va_start(ap, fmt);
 360 #else
 361         va_start(ap);
 362 #endif
 363         (void) vfprintf(stderr, fmt, ap);
 364         va_end(ap);
 365         (void) fflush(stdout);
 366         (void) fflush(stderr);
 367 #ifdef __STDC__
 368         va_start(ap, fmt);
 369 #else
 370         va_start(ap);
 371 #endif
 372         (void) vsnprintf(lastmsg, sizeof(lastmsg), fmt, ap);
 373         va_end(ap);
 374 }
 375
 376 void
 377 #ifdef __STDC__
 378 msgtail(const char *fmt, ...)
 379 #else
 380 msgtail(fmt, va_alist)
 381         char *fmt;
 382         va_dcl
 383 #endif
 384 {
 385         va_list ap;
 386 #ifdef __STDC__
 387         va_start(ap, fmt);
 388 #else
 389         va_start(ap);
 390 #endif
 391         (void) vfprintf(stderr, fmt, ap);
 392         va_end(ap);
 393 }
 394
 395 void
 396 #ifdef __STDC__
 397 quit(const char *fmt, ...)
 398 #else
 399 quit(fmt, va_alist)
 400         char *fmt;
 401         va_dcl
 402 #endif
 403 {
 404         va_list ap;
 405
 406         (void) fprintf(stderr,"  DUMP: ");
 407 #ifdef TDEBUG
 408         (void) fprintf(stderr, "pid=%d ", getpid());
 409 #endif
 410 #ifdef __STDC__
 411         va_start(ap, fmt);
 412 #else
 413         va_start(ap);
 414 #endif
 415         (void) vfprintf(stderr, fmt, ap);
 416         va_end(ap);
 417         (void) fflush(stdout);
 418         (void) fflush(stderr);
 419         dumpabort(0);
 420 }
 421
 422 /*
 423  *      Tell the operator what has to be done;
 424  *      we don't actually do it
 425  */
 426
 427 struct  pfstab {
 428         struct  pfstab *pf_next;
 429         struct  dumpdates *pf_dd;
 430         struct  mntent *pf_mntent;
 431 };
 432
 433 static  struct pfstab *table;
 434
 435 static struct mntent *
 436 allocfsent(struct mntent *fs)
 437 {
 438         struct mntent *new;
 439         const char *disk;
 440         struct stat buf, tabbuf;
 441         struct pfstab *tabpf;
 442         struct mntent *tabfs;
 443
 444         new = (struct mntent *)malloc(sizeof (*fs));
 445         if (new == NULL)
 446                 quit("%s\n", strerror(errno));
 447
 448         /* Translade UUID=, LABEL= ... */
 449         disk = get_device_name(fs->mnt_fsname);
 450         if (disk == NULL)
 451                 quit("Cannot find a disk having %s\n", fs->mnt_fsname);
 452
 453         /* Discard non block devices */
 454         if (stat(disk, &buf) != 0 || !S_ISBLK(buf.st_mode)) {
 455                 free(new);
 456                 return NULL;
 457         }
 458
 459         /* Discard same major/minor devices */
 460         for (tabpf = table; tabpf != NULL; tabpf = tabpf->pf_next) {
 461                 tabfs = tabpf->pf_mntent;
 462                 if (stat(tabfs->mnt_fsname, &tabbuf) != 0)
 463                         /* should not happen */
 464                         quit("Cannot access %s\n", tabfs->mnt_fsname);
 465                 if (tabbuf.st_rdev == buf.st_rdev) {
 466                         free(new);
 467                         return NULL;
 468                 }
 469         }
 470
 471         if (strlen(fs->mnt_dir) > 1 && fs->mnt_dir[strlen(fs->mnt_dir) - 1] == '/')
 472                 fs->mnt_dir[strlen(fs->mnt_dir) - 1] = '\0';
 473         if ((new->mnt_dir = strdup(fs->mnt_dir)) == NULL ||
 474             (new->mnt_type = strdup(fs->mnt_type)) == NULL ||
 475             (new->mnt_opts = strdup(fs->mnt_opts)) == NULL ||
 476             (new->mnt_fsname = strdup(disk)) == NULL)
 477                 quit("%s\n", strerror(errno));
 478         new->mnt_passno = fs->mnt_passno;
 479         new->mnt_freq = fs->mnt_freq;
 480         return (new);
 481 }
 482
 483 void
 484 getfstab(void)
 485 {
 486         struct mntent *fs;
 487         struct pfstab *pf;
 488         struct pfstab *pfold = NULL;
 489         FILE *mntfp;
 490         char *mnttables[] = { _PATH_MNTTAB, _PATH_MOUNTED, 0 };
 491         int i;
 492
 493         for (i = 0; mnttables[i]; i++) {
 494                 mntfp = setmntent(mnttables[i], "r");
 495                 if (mntfp == NULL) {
 496                         msg("Can't open %s for dump table information: %s\n",
 497                             mnttables[i], strerror(errno));
 498                         continue;
 499                 }
 500                 while ((fs = getmntent(mntfp)) != NULL) {
 501                         fs = allocfsent(fs);
 502                         if (!fs)
 503                                 continue;
 504                         fs->mnt_passno = 0;
 505                         if ((pf = (struct pfstab *)malloc(sizeof (*pf))) == NULL)
 506                                 quit("%s\n", strerror(errno));
 507                         pf->pf_mntent = fs;
 508                         pf->pf_next = NULL;
 509
 510                         /* keep table in /etc/fstab order for use with -w and -W */
 511                         if (pfold) {
 512                                 pfold->pf_next = pf;
 513                                 pfold = pf;
 514                         } else
 515                                 pfold = table = pf;
 516                 }
 517                 (void) endmntent(mntfp);
 518         }
 519 }
 520
 521 /*
 522  * Search in the fstab for a file name.
 523  * This file name can be either the special or the path file name.
 524  *
 525  * The entries in the fstab are the BLOCK special names, not the
 526  * character special names.
 527  * The caller of fstabsearch assures that the character device
 528  * is dumped (that is much faster)
 529  *
 530  * The file name can omit the leading '/'.
 531  */
 532 struct mntent *
 533 fstabsearch(const char *key)
 534 {
 535         struct pfstab *pf;
 536         struct mntent *fs;
 537         const char *rn;
 538
 539         for (pf = table; pf != NULL; pf = pf->pf_next) {
 540                 fs = pf->pf_mntent;
 541                 if (strcmp(fs->mnt_dir, key) == 0 ||
 542                     strcmp(fs->mnt_fsname, key) == 0)
 543                         return (fs);
 544                 rn = rawname(fs->mnt_fsname);
 545                 if (rn != NULL && strcmp(rn, key) == 0)
 546                         return (fs);
 547                 if (key[0] != '/') {
 548                         if (*fs->mnt_fsname == '/' &&
 549                             strcmp(fs->mnt_fsname + 1, key) == 0)
 550                                 return (fs);
 551                         if (*fs->mnt_dir == '/' &&
 552                             strcmp(fs->mnt_dir + 1, key) == 0)
 553                                 return (fs);
 554                 }
 555         }
 556         return (NULL);
 557 }
 558
 559 #ifdef  __linux__
 560 struct mntent *
 561 fstabsearchdir(const char *key, char *directory)
 562 {
 563         struct pfstab *pf;
 564         struct mntent *fs;
 565         struct mntent *found_fs = NULL;
 566         unsigned int size = 0;
 567         struct stat buf;
 568
 569         if (stat(key, &buf) == 0 && S_ISBLK(buf.st_mode))
 570                 return NULL;
 571
 572         for (pf = table; pf != NULL; pf = pf->pf_next) {
 573                 fs = pf->pf_mntent;
 574                 if (strlen(fs->mnt_dir) > size &&
 575                     strlen(key) > strlen(fs->mnt_dir) &&
 576                     strncmp(fs->mnt_dir, key, strlen(fs->mnt_dir)) == 0 &&
 577                     (key[strlen(fs->mnt_dir)] == '/' ||
 578                      fs->mnt_dir[strlen(fs->mnt_dir) - 1] == '/')) {
 579                         found_fs = fs;
 580                         size = strlen(fs->mnt_dir);
 581                 }
 582         }
 583         if (found_fs != NULL) {
 584                 /*
 585                  * Ok, we have found a fstab entry which matches the argument
 586                  * We have to split the argument name into:
 587                  * - a device name (from the fstab entry)
 588                  * - a directory name on this device
 589                  */
 590                 strcpy(directory, key + size);
 591         }
 592         return(found_fs);
 593 }
 594 #endif
 595
 596 static void
 597 print_wmsg(char arg, int dumpme, const char *dev, int level,
 598            const char *mtpt, time_t ddate)
 599 {
 600 #ifdef FDEBUG
 601         printf("checking dev %s: lvl %d, mtpt %s\n", dev, level, mtpt);
 602 #endif
 603         if (!dumpme && arg == 'w')
 604                 return;
 605
 606         (void) printf("%c %8s\t(%6s) Last dump: ",
 607                       dumpme && (arg != 'w') ? '>' : ' ',
 608                       dev,
 609                       mtpt ? mtpt : "");
 610
 611         /*
 612          * Check ddate > 365 to avoid issues with fs in stab but not dumpdates.
 613          * Not a problem, because ddate is in seconds since the epoch anyways.
 614          */
 615         if (ddate > 365) {
 616                 char *date, *d;
 617
 618                 date = (char *)ctime(&ddate);
 619                 d = strchr(date, '\n');
 620                 if (d) *d = '\0';
 621                 printf("Level %c, Date %s\n", level, date);
 622         } else
 623                 printf("never\n");
 624 }
 625
 626 /*
 627  *      Tell the operator what to do
 628  */
 629 void
 630 lastdump(char arg) /* w ==> just what to do; W ==> most recent dumps */
 631 {
 632         struct pfstab *pf;
 633         time_t tnow;
 634
 635         tnow = time(NULL);
 636         getfstab();             /* /etc/fstab input */
 637         initdumptimes(0);       /* dumpdates input */
 638         if (ddatev == NULL && table == NULL) {
 639                 (void) printf("No %s or %s file found\n",
 640                               _PATH_MNTTAB, _PATH_DUMPDATES);
 641                 return;
 642         }
 643
 644         if (arg == 'w')
 645                 (void) printf("Dump these file systems:\n");
 646         else
 647                 (void) printf("Last dump(s) done (Dump '>' file systems):\n");
 648
 649         /* For files in dumpdates, get the last dump level and date */
 650         if (ddatev != NULL) {
 651                 struct dumpdates *dtwalk = NULL;
 652                 int i;
 653                 char *lastname;
 654
 655                 qsort((char *) ddatev, nddates, sizeof(struct dumpdates *), datesort);
 656
 657                 lastname = "??";
 658                 ITITERATE(i, dtwalk) {
 659                         struct mntent *dt;
 660                         if (strncmp(lastname, dtwalk->dd_name,
 661                                 sizeof(dtwalk->dd_name)) == 0)
 662                                 continue;
 663                         lastname = dtwalk->dd_name;
 664                         if ((dt = dtwalk->dd_fstab) != NULL) {
 665                                 /* Overload fs_freq as dump level and
 666                                  * fs_passno as date, because we can't
 667                                  * change struct fstab format.
 668                                  * A positive fs_freq means this
 669                                  * filesystem needs to be dumped.
 670                                  */
 671                                 dt->mnt_passno = dtwalk->dd_ddate;
 672                                 if (dt->mnt_freq > 0 && (dtwalk->dd_ddate <
 673                                     tnow - (dt->mnt_freq * 86400)))
 674                                         dt->mnt_freq = dtwalk->dd_level;
 675                                 else
 676                                         dt->mnt_freq = -dtwalk->dd_level;
 677 #ifdef FDEBUG
 678                                 printf("%s fs_freq set to %d\n", lastname,
 679                                         dt->mnt_freq);
 680 #endif
 681                         }
 682                 }
 683         }
 684
 685         /* print in /etc/fstab order only those filesystem types we can dump */
 686         for (pf = table; pf != NULL; pf = pf->pf_next) {
 687                 struct mntent *dt = pf->pf_mntent;
 688                 char **type;
 689
 690                 for (type = fstypes; *type != NULL; type++) {
 691                         if (strncmp(dt->mnt_type, *type,
 692                                     sizeof(dt->mnt_type)) == 0) {
 693                                 const char *disk = get_device_name(dt->mnt_fsname);
 694                                 print_wmsg(arg, dt->mnt_freq > 0,
 695                                            disk ? disk : dt->mnt_fsname,
 696                                            dt->mnt_freq < 0 ? -dt->mnt_freq :
 697                                                               dt->mnt_freq,
 698                                            dt->mnt_dir,
 699                                            dt->mnt_passno);
 700                         }
 701                 }
 702         }
 703
 704         /* print in /etc/dumpdates order if not in /etc/fstab */
 705         if (ddatev != NULL) {
 706                 struct dumpdates *dtwalk = NULL;
 707                 char *lastname;
 708                 int i;
 709
 710                 lastname = "??";
 711                 ITITERATE(i, dtwalk) {
 712                         if (strncmp(lastname, dtwalk->dd_name,
 713                                 sizeof(dtwalk->dd_name)) == 0 ||
 714                             dtwalk->dd_fstab != NULL)
 715                                 continue;
 716                         lastname = dtwalk->dd_name;
 717                         print_wmsg(arg, 0, dtwalk->dd_name,
 718                                    dtwalk->dd_level, NULL, dtwalk->dd_ddate);
 719                 }
 720         }
 721 }
 722
 723 int
 724 datesort(const void *a1, const void *a2)
 725 {
 726         struct dumpdates *d1 = *(struct dumpdates **)a1;
 727         struct dumpdates *d2 = *(struct dumpdates **)a2;
 728         int diff;
 729
 730         diff = strncmp(d1->dd_name, d2->dd_name, sizeof(d1->dd_name));
 731         if (diff == 0)
 732                 return (d2->dd_ddate - d1->dd_ddate);
 733         return (diff);
 734 }