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