sbin/mount/mount.c

   1 /*-
   2  * Copyright (c) 1980, 1989, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1980, 1989, 1993, 1994 The Regents of the University of California.  All rights reserved.
  34  * @(#)mount.c  8.25 (Berkeley) 5/8/95
  35  * $FreeBSD: src/sbin/mount/mount.c,v 1.39.2.3 2001/08/01 08:26:23 obrien Exp $
  36  * $DragonFly: src/sbin/mount/mount.c,v 1.10 2005/04/03 17:13:08 joerg Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/mount.h>
  41 #include <sys/mountctl.h>
  42 #include <sys/stat.h>
  43 #include <sys/wait.h>
  44
  45 #include <err.h>
  46 #include <errno.h>
  47 #include <fstab.h>
  48 #include <pwd.h>
  49 #include <signal.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <unistd.h>
  54
  55 #include "extern.h"
  56 #include "mntopts.h"
  57 #include "pathnames.h"
  58
  59 /* `meta' options */
  60 #define MOUNT_META_OPTION_FSTAB         "fstab"
  61 #define MOUNT_META_OPTION_CURRENT       "current"
  62
  63 int debug, fstab_style, verbose;
  64
  65 static char  *catopt(char *, const char *);
  66 static struct statfs
  67              *getmntpt(const char *);
  68 static int    hasopt(const char *, const char *);
  69 static int    ismounted(struct fstab *, struct statfs *, int);
  70 static int    isremountable(const char *);
  71 static void   mangle(char *, int *, const char **);
  72 static char  *update_options(char *, char *, int);
  73 static int    mountfs(const char *, const char *, const char *,
  74                       int, const char *, const char *);
  75 static void   remopt(char *, const char *);
  76 static void   printdefvals(const struct statfs *);
  77 static void   prmount(struct statfs *);
  78 static void   putfsent(const struct statfs *);
  79 static void   usage(void);
  80 static char  *flags2opts(int);
  81 static char  *xstrdup(const char *str);
  82
  83 /*
  84  * List of VFS types that can be remounted without becoming mounted on top
  85  * of each other.
  86  * XXX Is this list correct?
  87  */
  88 static const char *
  89 remountable_fs_names[] = {
  90         "ufs", "ffs", "ext2fs",
  91         0
  92 };
  93
  94 int
  95 main(int argc, char **argv)
  96 {
  97         const char *mntfromname, **vfslist, *vfstype;
  98         struct fstab *fs;
  99         struct statfs *mntbuf;
 100         FILE *mountdfp;
 101         pid_t pid;
 102         int all, ch, i, init_flags, mntsize, rval, have_fstab;
 103         char *options;
 104
 105         all = init_flags = 0;
 106         options = NULL;
 107         vfslist = NULL;
 108         vfstype = "ufs";
 109         while ((ch = getopt(argc, argv, "adfo:prwt:uv")) != -1)
 110                 switch (ch) {
 111                 case 'a':
 112                         all = 1;
 113                         break;
 114                 case 'd':
 115                         debug = 1;
 116                         break;
 117                 case 'f':
 118                         init_flags |= MNT_FORCE;
 119                         break;
 120                 case 'o':
 121                         if (*optarg)
 122                                 options = catopt(options, optarg);
 123                         break;
 124                 case 'p':
 125                         fstab_style = 1;
 126                         verbose = 1;
 127                         break;
 128                 case 'r':
 129                         options = catopt(options, "ro");
 130                         break;
 131                 case 't':
 132                         if (vfslist != NULL)
 133                                 errx(1, "only one -t option may be specified");
 134                         vfslist = makevfslist(optarg);
 135                         vfstype = optarg;
 136                         break;
 137                 case 'u':
 138                         init_flags |= MNT_UPDATE;
 139                         break;
 140                 case 'v':
 141                         verbose = 1;
 142                         break;
 143                 case 'w':
 144                         options = catopt(options, "noro");
 145                         break;
 146                 case '?':
 147                 default:
 148                         usage();
 149                         /* NOTREACHED */
 150                 }
 151         argc -= optind;
 152         argv += optind;
 153
 154 #define BADTYPE(type)                                                   \
 155         (strcmp(type, FSTAB_RO) &&                                      \
 156             strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
 157
 158         rval = 0;
 159         switch (argc) {
 160         case 0:
 161                 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
 162                         err(1, "getmntinfo");
 163                 if (all) {
 164                         while ((fs = getfsent()) != NULL) {
 165                                 if (BADTYPE(fs->fs_type))
 166                                         continue;
 167                                 if (checkvfsname(fs->fs_vfstype, vfslist))
 168                                         continue;
 169                                 if (hasopt(fs->fs_mntops, "noauto"))
 170                                         continue;
 171                                 if (!(init_flags & MNT_UPDATE) &&
 172                                     ismounted(fs, mntbuf, mntsize))
 173                                         continue;
 174                                 options = update_options(options,
 175                                     fs->fs_mntops, mntbuf->f_flags);
 176                                 if (mountfs(fs->fs_vfstype, fs->fs_spec,
 177                                     fs->fs_file, init_flags, options,
 178                                     fs->fs_mntops))
 179                                         rval = 1;
 180                         }
 181                 } else if (fstab_style) {
 182                         for (i = 0; i < mntsize; i++) {
 183                                 if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
 184                                         continue;
 185                                 putfsent(&mntbuf[i]);
 186                         }
 187                 } else {
 188                         for (i = 0; i < mntsize; i++) {
 189                                 if (checkvfsname(mntbuf[i].f_fstypename,
 190                                     vfslist))
 191                                         continue;
 192                                 prmount(&mntbuf[i]);
 193                         }
 194                 }
 195                 exit(rval);
 196         case 1:
 197                 if (vfslist != NULL)
 198                         usage();
 199
 200                 rmslashes(*argv, *argv);
 201
 202                 if (init_flags & MNT_UPDATE) {
 203                         mntfromname = NULL;
 204                         have_fstab = 0;
 205                         if ((mntbuf = getmntpt(*argv)) == NULL)
 206                                 errx(1, "not currently mounted %s", *argv);
 207                         /*
 208                          * Only get the mntflags from fstab if both mntpoint
 209                          * and mntspec are identical. Also handle the special
 210                          * case where just '/' is mounted and 'spec' is not
 211                          * identical with the one from fstab ('/dev' is missing
 212                          * in the spec-string at boot-time).
 213                          */
 214                         if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
 215                                 if (strcmp(fs->fs_spec,
 216                                     mntbuf->f_mntfromname) == 0 &&
 217                                     strcmp(fs->fs_file,
 218                                     mntbuf->f_mntonname) == 0) {
 219                                         have_fstab = 1;
 220                                         mntfromname = mntbuf->f_mntfromname;
 221                                 } else if (argv[0][0] == '/' &&
 222                                     argv[0][1] == '\0') {
 223                                         fs = getfsfile("/");
 224                                         have_fstab = 1;
 225                                         mntfromname = fs->fs_spec;
 226                                 }
 227                         }
 228                         if (have_fstab) {
 229                                 options = update_options(options, fs->fs_mntops,
 230                                     mntbuf->f_flags);
 231                         } else {
 232                                 mntfromname = mntbuf->f_mntfromname;
 233                                 options = update_options(options, NULL,
 234                                     mntbuf->f_flags);
 235                         }
 236                         rval = mountfs(mntbuf->f_fstypename, mntfromname,
 237                             mntbuf->f_mntonname, init_flags, options, 0);
 238                         break;
 239                 }
 240                 if ((fs = getfsfile(*argv)) == NULL &&
 241                     (fs = getfsspec(*argv)) == NULL)
 242                         errx(1, "%s: unknown special file or file system",
 243                             *argv);
 244                 if (BADTYPE(fs->fs_type))
 245                         errx(1, "%s has unknown file system type",
 246                             *argv);
 247                 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
 248                     init_flags, options, fs->fs_mntops);
 249                 break;
 250         case 2:
 251                 /*
 252                  * If -t flag has not been specified, the path cannot be
 253                  * found, spec contains either a ':' or a '@', and the
 254                  * spec is not a file with those characters, then assume
 255                  * that an NFS filesystem is being specified ala Sun.
 256                  */
 257                 if (vfslist == NULL && strpbrk(argv[0], ":@") != NULL &&
 258                     access(argv[0], 0) == -1)
 259                         vfstype = "nfs";
 260                 rval = mountfs(vfstype, getdevpath(argv[0], 0), argv[1],
 261                                init_flags, options, NULL);
 262                 break;
 263         default:
 264                 usage();
 265                 /* NOTREACHED */
 266         }
 267
 268         /*
 269          * If the mount was successfully, and done by root, tell mountd the
 270          * good news.  Pid checks are probably unnecessary, but don't hurt.
 271          */
 272         if (rval == 0 && getuid() == 0 &&
 273             (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) {
 274                 if (fscanf(mountdfp, "%d", &pid) == 1 &&
 275                      pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH)
 276                         err(1, "signal mountd");
 277                 fclose(mountdfp);
 278         }
 279
 280         exit(rval);
 281 }
 282
 283 static int
 284 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
 285 {
 286         int i;
 287
 288         if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
 289                 /* the root file system can always be remounted */
 290                 return (0);
 291
 292         for (i = mntsize - 1; i >= 0; --i)
 293                 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 &&
 294                     (!isremountable(fs->fs_vfstype) ||
 295                      strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
 296                         return (1);
 297         return (0);
 298 }
 299
 300 static int
 301 isremountable(const char *vfsname)
 302 {
 303         const char **cp;
 304
 305         for (cp = remountable_fs_names; *cp; cp++)
 306                 if (strcmp(*cp, vfsname) == 0)
 307                         return (1);
 308         return (0);
 309 }
 310
 311 static int
 312 hasopt(const char *mntopts, const char *option)
 313 {
 314         int negative, found;
 315         char *opt, *optbuf;
 316
 317         if (option[0] == 'n' && option[1] == 'o') {
 318                 negative = 1;
 319                 option += 2;
 320         } else
 321                 negative = 0;
 322         optbuf = xstrdup(mntopts);
 323         found = 0;
 324         for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
 325                 if (opt[0] == 'n' && opt[1] == 'o') {
 326                         if (!strcasecmp(opt + 2, option))
 327                                 found = negative;
 328                 } else if (!strcasecmp(opt, option))
 329                         found = !negative;
 330         }
 331         free(optbuf);
 332         return (found);
 333 }
 334
 335 static int
 336 mountfs(const char *vfstype, const char *spec, const char *name, int flags,
 337         const char *options, const char *mntopts)
 338 {
 339         /* List of directories containing mount_xxx subcommands. */
 340         static const char *edirs[] = {
 341                 _PATH_SBIN,
 342                 _PATH_USRSBIN,
 343                 NULL
 344         };
 345         const char *argv[100], **edir;
 346         struct statfs sf;
 347         pid_t pid;
 348         int argc, i, status;
 349         char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN];
 350
 351 #if __GNUC__
 352         (void)&optbuf;
 353         (void)&name;
 354 #endif
 355
 356         /* resolve the mountpoint with realpath(3) */
 357         checkpath(name, mntpath);
 358         name = mntpath;
 359
 360         if (mntopts == NULL)
 361                 mntopts = "";
 362         if (options == NULL) {
 363                 if (*mntopts == '\0') {
 364                         options = "rw";
 365                 } else {
 366                         options = mntopts;
 367                         mntopts = "";
 368                 }
 369         }
 370         optbuf = catopt(xstrdup(mntopts), options);
 371
 372         if (strcmp(name, "/") == 0)
 373                 flags |= MNT_UPDATE;
 374         if (flags & MNT_FORCE)
 375                 optbuf = catopt(optbuf, "force");
 376         if (flags & MNT_RDONLY)
 377                 optbuf = catopt(optbuf, "ro");
 378         /*
 379          * XXX
 380          * The mount_mfs (newfs) command uses -o to select the
 381          * optimization mode.  We don't pass the default "-o rw"
 382          * for that reason.
 383          */
 384         if (flags & MNT_UPDATE)
 385                 optbuf = catopt(optbuf, "update");
 386
 387         argc = 0;
 388         argv[argc++] = vfstype;
 389         mangle(optbuf, &argc, argv);
 390         argv[argc++] = spec;
 391         argv[argc++] = name;
 392         argv[argc] = NULL;
 393
 394         if (debug) {
 395                 printf("exec: mount_%s", vfstype);
 396                 for (i = 1; i < argc; i++)
 397                         printf(" %s", argv[i]);
 398                 printf("\n");
 399                 return (0);
 400         }
 401
 402         switch (pid = fork()) {
 403         case -1:                                /* Error. */
 404                 warn("fork");
 405                 free(optbuf);
 406                 return (1);
 407         case 0:                                 /* Child. */
 408                 if (strcmp(vfstype, "ufs") == 0)
 409                         exit(mount_ufs(argc, argv));
 410
 411                 /* Go find an executable. */
 412                 for (edir = edirs; *edir; edir++) {
 413                         snprintf(execname,
 414                             sizeof(execname), "%s/mount_%s", *edir, vfstype);
 415                         execv(execname, __DECONST(char * const *, argv));
 416                 }
 417                 if (errno == ENOENT) {
 418                         int len = 0;
 419                         char *cp;
 420                         for (edir = edirs; *edir; edir++)
 421                                 len += strlen(*edir) + 2;       /* ", " */
 422                         if ((cp = malloc(len)) == NULL)
 423                                 errx(1, "malloc failed");
 424                         cp[0] = '\0';
 425                         for (edir = edirs; *edir; edir++) {
 426                                 strcat(cp, *edir);
 427                                 if (edir[1] != NULL)
 428                                         strcat(cp, ", ");
 429                         }
 430                         warn("exec mount_%s not found in %s", vfstype, cp);
 431                 }
 432                 exit(1);
 433                 /* NOTREACHED */
 434         default:                                /* Parent. */
 435                 free(optbuf);
 436
 437                 if (waitpid(pid, &status, 0) < 0) {
 438                         warn("waitpid");
 439                         return (1);
 440                 }
 441
 442                 if (WIFEXITED(status)) {
 443                         if (WEXITSTATUS(status) != 0)
 444                                 return (WEXITSTATUS(status));
 445                 } else if (WIFSIGNALED(status)) {
 446                         warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
 447                         return (1);
 448                 }
 449
 450                 if (verbose) {
 451                         if (statfs(name, &sf) < 0) {
 452                                 warn("statfs %s", name);
 453                                 return (1);
 454                         }
 455                         if (fstab_style)
 456                                 putfsent(&sf);
 457                         else
 458                                 prmount(&sf);
 459                 }
 460                 break;
 461         }
 462
 463         return (0);
 464 }
 465
 466 static void
 467 prmount(struct statfs *sfp)
 468 {
 469         struct passwd *pw;
 470         char *buf;
 471         int error;
 472         int len;
 473
 474         error = 0;
 475         len = 256;
 476
 477         if ((buf = malloc(len)) == NULL)
 478                 errx(1, "malloc failed");
 479
 480         printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
 481             sfp->f_fstypename);
 482
 483         /* Get a string buffer with all the used flags names */
 484         error = mountctl(sfp->f_mntonname, MOUNTCTL_MOUNTFLAGS,
 485                          -1, NULL, 0, buf, len);
 486
 487         if (sfp->f_owner) {
 488                 printf(", mounted by ");
 489                 if ((pw = getpwuid(sfp->f_owner)) != NULL)
 490                         printf("%s", pw->pw_name);
 491                 else
 492                         printf("%d", sfp->f_owner);
 493         }
 494
 495         if (strlen(buf))
 496                 printf(", %s", buf);
 497
 498         if (verbose) {
 499                 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
 500                         printf(", writes: sync %ld async %ld",
 501                             sfp->f_syncwrites, sfp->f_asyncwrites);
 502                 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
 503                         printf(", reads: sync %ld async %ld",
 504                             sfp->f_syncreads, sfp->f_asyncreads);
 505         }
 506         printf(")\n");
 507 }
 508
 509 static struct statfs *
 510 getmntpt(const char *name)
 511 {
 512         struct statfs *mntbuf;
 513         int i, mntsize;
 514
 515         mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
 516         for (i = mntsize - 1; i >= 0; i--) {
 517                 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
 518                     strcmp(mntbuf[i].f_mntonname, name) == 0)
 519                         return (&mntbuf[i]);
 520         }
 521         return (NULL);
 522 }
 523
 524 static char *
 525 catopt(char *s0, const char *s1)
 526 {
 527         size_t i;
 528         char *cp;
 529
 530         if (s1 == NULL || *s1 == '\0')
 531                 return s0;
 532
 533         if (s0 && *s0) {
 534                 i = strlen(s0) + strlen(s1) + 1 + 1;
 535                 if ((cp = malloc(i)) == NULL)
 536                         errx(1, "malloc failed");
 537                 snprintf(cp, i, "%s,%s", s0, s1);
 538         } else
 539                 cp = xstrdup(s1);
 540
 541         if (s0)
 542                 free(s0);
 543         return (cp);
 544 }
 545
 546 static void
 547 mangle(char *options, int *argcp, const char **argv)
 548 {
 549         char *p, *s;
 550         int argc;
 551
 552         argc = *argcp;
 553         for (s = options; (p = strsep(&s, ",")) != NULL;)
 554                 if (*p != '\0') {
 555                         if (*p == '-') {
 556                                 argv[argc++] = p;
 557                                 p = strchr(p, '=');
 558                                 if (p) {
 559                                         *p = '\0';
 560                                         argv[argc++] = p+1;
 561                                 }
 562                         } else if (strcmp(p, "rw") != 0) {
 563                                 argv[argc++] = "-o";
 564                                 argv[argc++] = p;
 565                         }
 566                 }
 567
 568         *argcp = argc;
 569 }
 570
 571
 572 static char *
 573 update_options(char *opts, char *fstab, int curflags)
 574 {
 575         char *o, *p;
 576         char *cur;
 577         char *expopt, *newopt, *tmpopt;
 578
 579         if (opts == NULL)
 580                 return xstrdup("");
 581
 582         /* remove meta options from list */
 583         remopt(fstab, MOUNT_META_OPTION_FSTAB);
 584         remopt(fstab, MOUNT_META_OPTION_CURRENT);
 585         cur = flags2opts(curflags);
 586
 587         /*
 588          * Expand all meta-options passed to us first.
 589          */
 590         expopt = NULL;
 591         for (p = opts; (o = strsep(&p, ",")) != NULL;) {
 592                 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
 593                         expopt = catopt(expopt, fstab);
 594                 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
 595                         expopt = catopt(expopt, cur);
 596                 else
 597                         expopt = catopt(expopt, o);
 598         }
 599         free(cur);
 600         free(opts);
 601
 602         /*
 603          * Remove previous contradictory arguments. Given option "foo" we
 604          * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
 605          * and "foo" - so we can deal with possible options like "notice".
 606          */
 607         newopt = NULL;
 608         for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
 609                 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
 610                         errx(1, "malloc failed");
 611
 612                 strcpy(tmpopt, "no");
 613                 strcat(tmpopt, o);
 614                 remopt(newopt, tmpopt);
 615                 free(tmpopt);
 616
 617                 if (strncmp("no", o, 2) == 0)
 618                         remopt(newopt, o+2);
 619
 620                 newopt = catopt(newopt, o);
 621         }
 622         free(expopt);
 623
 624         return newopt;
 625 }
 626
 627 static void
 628 remopt(char *string, const char *opt)
 629 {
 630         char *o, *p, *r;
 631
 632         if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
 633                 return;
 634
 635         r = string;
 636
 637         for (p = string; (o = strsep(&p, ",")) != NULL;) {
 638                 if (strcmp(opt, o) != 0) {
 639                         if (*r == ',' && *o != '\0')
 640                                 r++;
 641                         while ((*r++ = *o++) != '\0')
 642                             ;
 643                         *--r = ',';
 644                 }
 645         }
 646         *r = '\0';
 647 }
 648
 649 static void
 650 usage(void)
 651 {
 652
 653         fprintf(stderr, "%s\n%s\n%s\n",
 654 "usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node",
 655 "       mount [-adfpruvw] [-o options] [-t ufs | external_type]",
 656 "       mount [-dfpruvw] special | node");
 657         exit(1);
 658 }
 659
 660 /*
 661  * Prints the default values for dump frequency and pass number of fsck.
 662  * This happens when mount(8) is called with -p and there is no fstab file
 663  * or there is but the values aren't specified.
 664  */
 665 static void
 666 printdefvals(const struct statfs *ent)
 667 {
 668         if (strcmp(ent->f_fstypename, "ufs") == 0) {
 669                 if (strcmp(ent->f_mntonname, "/") == 0)
 670                         printf("\t1 1\n");
 671                 else
 672                         printf("\t2 2\n");
 673         } else {
 674                 printf("\t0 0\n");
 675         }
 676 }
 677
 678 static void
 679 putfsent(const struct statfs *ent)
 680 {
 681         struct stat sb;
 682         struct fstab *fst;
 683         char *opts;
 684
 685         opts = flags2opts(ent->f_flags);
 686         printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname,
 687             ent->f_fstypename, opts);
 688         free(opts);
 689
 690         /*
 691          * If fstab file is missing don't call getfsspec() or getfsfile()
 692          * at all, because the same warning will be printed twice for every
 693          * mounted filesystem.
 694          */
 695         if (stat(_PATH_FSTAB, &sb) != -1) {
 696                 if ((fst = getfsspec(ent->f_mntfromname)))
 697                         printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
 698                 else if ((fst = getfsfile(ent->f_mntonname)))
 699                         printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
 700                 else
 701                         printdefvals(ent);
 702         } else {
 703                 printdefvals(ent);
 704         }
 705 }
 706
 707
 708 static char *
 709 flags2opts(int flags)
 710 {
 711         char *res;
 712
 713         res = NULL;
 714
 715         res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw");
 716
 717         if (flags & MNT_SYNCHRONOUS)    res = catopt(res, "sync");
 718         if (flags & MNT_NOEXEC)         res = catopt(res, "noexec");
 719         if (flags & MNT_NOSUID)         res = catopt(res, "nosuid");
 720         if (flags & MNT_NODEV)          res = catopt(res, "nodev");
 721         if (flags & MNT_UNION)          res = catopt(res, "union");
 722         if (flags & MNT_ASYNC)          res = catopt(res, "async");
 723         if (flags & MNT_NOATIME)        res = catopt(res, "noatime");
 724         if (flags & MNT_NOCLUSTERR)     res = catopt(res, "noclusterr");
 725         if (flags & MNT_NOCLUSTERW)     res = catopt(res, "noclusterw");
 726         if (flags & MNT_NOSYMFOLLOW)    res = catopt(res, "nosymfollow");
 727         if (flags & MNT_SUIDDIR)        res = catopt(res, "suiddir");
 728         if (flags & MNT_IGNORE)         res = catopt(res, "ignore");
 729
 730         return res;
 731 }
 732
 733 static char*
 734 xstrdup(const char *str)
 735 {
 736         char* ret = strdup(str);
 737         if(ret == NULL) {
 738                 errx(1, "strdup failed (could not allocate memory)");
 739         }
 740         return ret;
 741 }