src/fstab-generator/fstab-generator.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2012 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <errno.h>
  21 #include <mntent.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26 #include "alloc-util.h"
  27 #include "fd-util.h"
  28 #include "fileio.h"
  29 #include "fstab-util.h"
  30 #include "generator.h"
  31 #include "log.h"
  32 #include "mkdir.h"
  33 #include "mount-setup.h"
  34 #include "mount-util.h"
  35 #include "parse-util.h"
  36 #include "path-util.h"
  37 #include "proc-cmdline.h"
  38 #include "special.h"
  39 #include "stat-util.h"
  40 #include "string-util.h"
  41 #include "strv.h"
  42 #include "unit-name.h"
  43 #include "util.h"
  44 #include "virt.h"
  45
  46 static const char *arg_dest = "/tmp";
  47 static bool arg_fstab_enabled = true;
  48 static char *arg_root_what = NULL;
  49 static char *arg_root_fstype = NULL;
  50 static char *arg_root_options = NULL;
  51 static int arg_root_rw = -1;
  52 static char *arg_usr_what = NULL;
  53 static char *arg_usr_fstype = NULL;
  54 static char *arg_usr_options = NULL;
  55
  56 static int add_swap(
  57                 const char *what,
  58                 struct mntent *me,
  59                 bool noauto,
  60                 bool nofail) {
  61
  62         _cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
  63         _cleanup_fclose_ FILE *f = NULL;
  64         int r;
  65
  66         assert(what);
  67         assert(me);
  68
  69         if (access("/proc/swaps", F_OK) < 0) {
  70                 log_info("Swap not supported, ignoring fstab swap entry for %s.", what);
  71                 return 0;
  72         }
  73
  74         if (detect_container() > 0) {
  75                 log_info("Running in a container, ignoring fstab swap entry for %s.", what);
  76                 return 0;
  77         }
  78
  79         r = unit_name_from_path(what, ".swap", &name);
  80         if (r < 0)
  81                 return log_error_errno(r, "Failed to generate unit name: %m");
  82
  83         unit = strjoin(arg_dest, "/", name, NULL);
  84         if (!unit)
  85                 return log_oom();
  86
  87         f = fopen(unit, "wxe");
  88         if (!f)
  89                 return log_error_errno(errno,
  90                                        errno == EEXIST ?
  91                                        "Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?" :
  92                                        "Failed to create unit file %s: %m",
  93                                        unit);
  94
  95         fprintf(f,
  96                 "# Automatically generated by systemd-fstab-generator\n\n"
  97                 "[Unit]\n"
  98                 "SourcePath=/etc/fstab\n"
  99                 "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
 100                 "[Swap]\n"
 101                 "What=%s\n",
 102                 what);
 103
 104         if (!isempty(me->mnt_opts) && !streq(me->mnt_opts, "defaults"))
 105                 fprintf(f, "Options=%s\n", me->mnt_opts);
 106
 107         r = fflush_and_check(f);
 108         if (r < 0)
 109                 return log_error_errno(r, "Failed to write unit file %s: %m", unit);
 110
 111         /* use what as where, to have a nicer error message */
 112         r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL);
 113         if (r < 0)
 114                 return r;
 115
 116         if (!noauto) {
 117                 lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET,
 118                               nofail ? ".wants/" : ".requires/", name, NULL);
 119                 if (!lnk)
 120                         return log_oom();
 121
 122                 mkdir_parents_label(lnk, 0755);
 123                 if (symlink(unit, lnk) < 0)
 124                         return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
 125         }
 126
 127         return 0;
 128 }
 129
 130 static bool mount_is_network(struct mntent *me) {
 131         assert(me);
 132
 133         return fstab_test_option(me->mnt_opts, "_netdev\0") ||
 134                fstype_is_network(me->mnt_type);
 135 }
 136
 137 static bool mount_in_initrd(struct mntent *me) {
 138         assert(me);
 139
 140         return fstab_test_option(me->mnt_opts, "x-initrd.mount\0") ||
 141                streq(me->mnt_dir, "/usr");
 142 }
 143
 144 static int write_idle_timeout(FILE *f, const char *where, const char *opts) {
 145         _cleanup_free_ char *timeout = NULL;
 146         char timespan[FORMAT_TIMESPAN_MAX];
 147         usec_t u;
 148         int r;
 149
 150         r = fstab_filter_options(opts, "x-systemd.idle-timeout\0", NULL, &timeout, NULL);
 151         if (r < 0)
 152                 return log_warning_errno(r, "Failed to parse options: %m");
 153         if (r == 0)
 154                 return 0;
 155
 156         r = parse_sec(timeout, &u);
 157         if (r < 0) {
 158                 log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout);
 159                 return 0;
 160         }
 161
 162         fprintf(f, "TimeoutIdleSec=%s\n", format_timespan(timespan, sizeof(timespan), u, 0));
 163
 164         return 0;
 165 }
 166
 167 static int write_requires_after(FILE *f, const char *opts) {
 168         _cleanup_strv_free_ char **names = NULL, **units = NULL;
 169         _cleanup_free_ char *res = NULL;
 170         char **s;
 171         int r;
 172
 173         assert(f);
 174         assert(opts);
 175
 176         r = fstab_extract_values(opts, "x-systemd.requires", &names);
 177         if (r < 0)
 178                 return log_warning_errno(r, "Failed to parse options: %m");
 179         if (r == 0)
 180                 return 0;
 181
 182         STRV_FOREACH(s, names) {
 183                 char *x;
 184
 185                 r = unit_name_mangle_with_suffix(*s, UNIT_NAME_NOGLOB, ".mount", &x);
 186                 if (r < 0)
 187                         return log_error_errno(r, "Failed to generate unit name: %m");
 188                 r = strv_consume(&units, x);
 189                 if (r < 0)
 190                         return log_oom();
 191         }
 192
 193         if (units) {
 194                 res = strv_join(units, " ");
 195                 if (!res)
 196                         return log_oom();
 197                 fprintf(f, "After=%1$s\nRequires=%1$s\n", res);
 198         }
 199
 200         return 0;
 201 }
 202
 203 static int write_requires_mounts_for(FILE *f, const char *opts) {
 204         _cleanup_strv_free_ char **paths = NULL;
 205         _cleanup_free_ char *res = NULL;
 206         int r;
 207
 208         assert(f);
 209         assert(opts);
 210
 211         r = fstab_extract_values(opts, "x-systemd.requires-mounts-for", &paths);
 212         if (r < 0)
 213                 return log_warning_errno(r, "Failed to parse options: %m");
 214         if (r == 0)
 215                 return 0;
 216
 217         res = strv_join(paths, " ");
 218         if (!res)
 219                 return log_oom();
 220
 221         fprintf(f, "RequiresMountsFor=%s\n", res);
 222
 223         return 0;
 224 }
 225
 226 static int add_mount(
 227                 const char *what,
 228                 const char *where,
 229                 const char *fstype,
 230                 const char *opts,
 231                 int passno,
 232                 bool noauto,
 233                 bool nofail,
 234                 bool automount,
 235                 const char *post,
 236                 const char *source) {
 237
 238         _cleanup_free_ char
 239                 *name = NULL, *unit = NULL, *lnk = NULL,
 240                 *automount_name = NULL, *automount_unit = NULL,
 241                 *filtered = NULL;
 242         _cleanup_fclose_ FILE *f = NULL;
 243         int r;
 244
 245         assert(what);
 246         assert(where);
 247         assert(opts);
 248         assert(post);
 249         assert(source);
 250
 251         if (streq_ptr(fstype, "autofs"))
 252                 return 0;
 253
 254         if (!is_path(where)) {
 255                 log_warning("Mount point %s is not a valid path, ignoring.", where);
 256                 return 0;
 257         }
 258
 259         if (mount_point_is_api(where) ||
 260             mount_point_ignore(where))
 261                 return 0;
 262
 263         if (path_equal(where, "/")) {
 264                 if (noauto)
 265                         log_warning("Ignoring \"noauto\" for root device");
 266                 if (nofail)
 267                         log_warning("Ignoring \"nofail\" for root device");
 268                 if (automount)
 269                         log_warning("Ignoring automount option for root device");
 270
 271                 noauto = nofail = automount = false;
 272         }
 273
 274         r = unit_name_from_path(where, ".mount", &name);
 275         if (r < 0)
 276                 return log_error_errno(r, "Failed to generate unit name: %m");
 277
 278         unit = strjoin(arg_dest, "/", name, NULL);
 279         if (!unit)
 280                 return log_oom();
 281
 282         f = fopen(unit, "wxe");
 283         if (!f)
 284                 return log_error_errno(errno,
 285                                        errno == EEXIST ?
 286                                        "Failed to create mount unit file %s, as it already exists. Duplicate entry in /etc/fstab?" :
 287                                        "Failed to create unit file %s: %m",
 288                                        unit);
 289
 290         fprintf(f,
 291                 "# Automatically generated by systemd-fstab-generator\n\n"
 292                 "[Unit]\n"
 293                 "SourcePath=%s\n"
 294                 "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
 295                 source);
 296
 297         if (!noauto && !nofail && !automount)
 298                 fprintf(f, "Before=%s\n", post);
 299
 300         if (!automount && opts) {
 301                  r = write_requires_after(f, opts);
 302                  if (r < 0)
 303                          return r;
 304                  r = write_requires_mounts_for(f, opts);
 305                  if (r < 0)
 306                          return r;
 307         }
 308
 309         if (passno != 0) {
 310                 r = generator_write_fsck_deps(f, arg_dest, what, where, fstype);
 311                 if (r < 0)
 312                         return r;
 313         }
 314
 315         fprintf(f,
 316                 "\n"
 317                 "[Mount]\n"
 318                 "What=%s\n"
 319                 "Where=%s\n",
 320                 what,
 321                 where);
 322
 323         if (!isempty(fstype) && !streq(fstype, "auto"))
 324                 fprintf(f, "Type=%s\n", fstype);
 325
 326         r = generator_write_timeouts(arg_dest, what, where, opts, &filtered);
 327         if (r < 0)
 328                 return r;
 329
 330         if (!isempty(filtered) && !streq(filtered, "defaults"))
 331                 fprintf(f, "Options=%s\n", filtered);
 332
 333         r = fflush_and_check(f);
 334         if (r < 0)
 335                 return log_error_errno(r, "Failed to write unit file %s: %m", unit);
 336
 337         if (!noauto && !automount) {
 338                 lnk = strjoin(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", name, NULL);
 339                 if (!lnk)
 340                         return log_oom();
 341
 342                 mkdir_parents_label(lnk, 0755);
 343                 if (symlink(unit, lnk) < 0)
 344                         return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
 345         }
 346
 347         if (automount) {
 348                 r = unit_name_from_path(where, ".automount", &automount_name);
 349                 if (r < 0)
 350                         return log_error_errno(r, "Failed to generate unit name: %m");
 351
 352                 automount_unit = strjoin(arg_dest, "/", automount_name, NULL);
 353                 if (!automount_unit)
 354                         return log_oom();
 355
 356                 fclose(f);
 357                 f = fopen(automount_unit, "wxe");
 358                 if (!f)
 359                         return log_error_errno(errno, "Failed to create unit file %s: %m", automount_unit);
 360
 361                 fprintf(f,
 362                         "# Automatically generated by systemd-fstab-generator\n\n"
 363                         "[Unit]\n"
 364                         "SourcePath=%s\n"
 365                         "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
 366                         source);
 367
 368                 fprintf(f, "Before=%s\n", post);
 369
 370                 if (opts) {
 371                         r = write_requires_after(f, opts);
 372                         if (r < 0)
 373                                 return r;
 374                         r = write_requires_mounts_for(f, opts);
 375                         if (r < 0)
 376                                 return r;
 377                 }
 378
 379                 fprintf(f,
 380                         "\n"
 381                         "[Automount]\n"
 382                         "Where=%s\n",
 383                         where);
 384
 385                 r = write_idle_timeout(f, where, opts);
 386                 if (r < 0)
 387                         return r;
 388
 389                 r = fflush_and_check(f);
 390                 if (r < 0)
 391                         return log_error_errno(r, "Failed to write unit file %s: %m", automount_unit);
 392
 393                 free(lnk);
 394                 lnk = strjoin(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL);
 395                 if (!lnk)
 396                         return log_oom();
 397
 398                 mkdir_parents_label(lnk, 0755);
 399                 if (symlink(automount_unit, lnk) < 0)
 400                         return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
 401         }
 402
 403         return 0;
 404 }
 405
 406 static int parse_fstab(bool initrd) {
 407         _cleanup_endmntent_ FILE *f = NULL;
 408         const char *fstab_path;
 409         struct mntent *me;
 410         int r = 0;
 411
 412         fstab_path = initrd ? "/sysroot/etc/fstab" : "/etc/fstab";
 413         f = setmntent(fstab_path, "re");
 414         if (!f) {
 415                 if (errno == ENOENT)
 416                         return 0;
 417
 418                 return log_error_errno(errno, "Failed to open %s: %m", fstab_path);
 419         }
 420
 421         while ((me = getmntent(f))) {
 422                 _cleanup_free_ char *where = NULL, *what = NULL;
 423                 bool noauto, nofail;
 424                 int k;
 425
 426                 if (initrd && !mount_in_initrd(me))
 427                         continue;
 428
 429                 what = fstab_node_to_udev_node(me->mnt_fsname);
 430                 if (!what)
 431                         return log_oom();
 432
 433                 if (is_device_path(what) && path_is_read_only_fs("sys") > 0) {
 434                         log_info("Running in a container, ignoring fstab device entry for %s.", what);
 435                         continue;
 436                 }
 437
 438                 where = initrd ? strappend("/sysroot/", me->mnt_dir) : strdup(me->mnt_dir);
 439                 if (!where)
 440                         return log_oom();
 441
 442                 if (is_path(where))
 443                         path_kill_slashes(where);
 444
 445                 noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0");
 446                 nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0");
 447                 log_debug("Found entry what=%s where=%s type=%s nofail=%s noauto=%s",
 448                           what, where, me->mnt_type,
 449                           yes_no(noauto), yes_no(nofail));
 450
 451                 if (streq(me->mnt_type, "swap"))
 452                         k = add_swap(what, me, noauto, nofail);
 453                 else {
 454                         bool automount;
 455                         const char *post;
 456
 457                         automount = fstab_test_option(me->mnt_opts,
 458                                                       "comment=systemd.automount\0"
 459                                                       "x-systemd.automount\0");
 460                         if (initrd)
 461                                 post = SPECIAL_INITRD_FS_TARGET;
 462                         else if (mount_is_network(me))
 463                                 post = SPECIAL_REMOTE_FS_TARGET;
 464                         else
 465                                 post = SPECIAL_LOCAL_FS_TARGET;
 466
 467                         k = add_mount(what,
 468                                       where,
 469                                       me->mnt_type,
 470                                       me->mnt_opts,
 471                                       me->mnt_passno,
 472                                       noauto,
 473                                       nofail,
 474                                       automount,
 475                                       post,
 476                                       fstab_path);
 477                 }
 478
 479                 if (k < 0)
 480                         r = k;
 481         }
 482
 483         return r;
 484 }
 485
 486 static int add_sysroot_mount(void) {
 487         _cleanup_free_ char *what = NULL;
 488         const char *opts;
 489         int r;
 490
 491         if (isempty(arg_root_what)) {
 492                 log_debug("Could not find a root= entry on the kernel command line.");
 493                 return 0;
 494         }
 495
 496         if (streq(arg_root_what, "gpt-auto")) {
 497                 /* This is handled by the gpt-auto generator */
 498                 log_debug("Skipping root directory handling, as gpt-auto was requested.");
 499                 return 0;
 500         }
 501
 502         if (path_equal(arg_root_what, "/dev/nfs")) {
 503                 /* This is handled by the kernel or the initrd */
 504                 log_debug("Skipping root directory handling, as /dev/nfs was requested.");
 505                 return 0;
 506         }
 507
 508         what = fstab_node_to_udev_node(arg_root_what);
 509         if (!what)
 510                 return log_oom();
 511
 512         if (!arg_root_options)
 513                 opts = arg_root_rw > 0 ? "rw" : "ro";
 514         else if (arg_root_rw >= 0 ||
 515                  !fstab_test_option(arg_root_options, "ro\0" "rw\0"))
 516                 opts = strjoina(arg_root_options, ",", arg_root_rw > 0 ? "rw" : "ro");
 517         else
 518                 opts = arg_root_options;
 519
 520         log_debug("Found entry what=%s where=/sysroot type=%s", what, strna(arg_root_fstype));
 521
 522         if (is_device_path(what)) {
 523                 r = generator_write_initrd_root_device_deps(arg_dest, what);
 524                 if (r < 0)
 525                         return r;
 526         }
 527
 528         return add_mount(what,
 529                          "/sysroot",
 530                          arg_root_fstype,
 531                          opts,
 532                          is_device_path(what) ? 1 : 0, /* passno */
 533                          false,                        /* noauto off */
 534                          false,                        /* nofail off */
 535                          false,                        /* automount off */
 536                          SPECIAL_INITRD_ROOT_FS_TARGET,
 537                          "/proc/cmdline");
 538 }
 539
 540 static int add_sysroot_usr_mount(void) {
 541         _cleanup_free_ char *what = NULL;
 542         const char *opts;
 543
 544         if (!arg_usr_what && !arg_usr_fstype && !arg_usr_options)
 545                 return 0;
 546
 547         if (arg_root_what && !arg_usr_what) {
 548                 /* Copy over the root device, in case the /usr mount just differs in a mount option (consider btrfs subvolumes) */
 549                 arg_usr_what = strdup(arg_root_what);
 550                 if (!arg_usr_what)
 551                         return log_oom();
 552         }
 553
 554         if (arg_root_fstype && !arg_usr_fstype) {
 555                 arg_usr_fstype = strdup(arg_root_fstype);
 556                 if (!arg_usr_fstype)
 557                         return log_oom();
 558         }
 559
 560         if (arg_root_options && !arg_usr_options) {
 561                 arg_usr_options = strdup(arg_root_options);
 562                 if (!arg_usr_options)
 563                         return log_oom();
 564         }
 565
 566         if (!arg_usr_what)
 567                 return 0;
 568
 569         what = fstab_node_to_udev_node(arg_usr_what);
 570         if (!what)
 571                 return log_oom();
 572
 573         if (!arg_usr_options)
 574                 opts = arg_root_rw > 0 ? "rw" : "ro";
 575         else if (!fstab_test_option(arg_usr_options, "ro\0" "rw\0"))
 576                 opts = strjoina(arg_usr_options, ",", arg_root_rw > 0 ? "rw" : "ro");
 577         else
 578                 opts = arg_usr_options;
 579
 580         log_debug("Found entry what=%s where=/sysroot/usr type=%s", what, strna(arg_usr_fstype));
 581         return add_mount(what,
 582                          "/sysroot/usr",
 583                          arg_usr_fstype,
 584                          opts,
 585                          is_device_path(what) ? 1 : 0, /* passno */
 586                          false,                        /* noauto off */
 587                          false,                        /* nofail off */
 588                          false,                        /* automount off */
 589                          SPECIAL_INITRD_FS_TARGET,
 590                          "/proc/cmdline");
 591 }
 592
 593 static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
 594         int r;
 595
 596         /* root=, usr=, usrfstype= and roofstype= may occur more than once, the last
 597          * instance should take precedence.  In the case of multiple rootflags=
 598          * or usrflags= the arguments should be concatenated */
 599
 600         if (STR_IN_SET(key, "fstab", "rd.fstab") && value) {
 601
 602                 r = parse_boolean(value);
 603                 if (r < 0)
 604                         log_warning("Failed to parse fstab switch %s. Ignoring.", value);
 605                 else
 606                         arg_fstab_enabled = r;
 607
 608         } else if (streq(key, "root") && value) {
 609
 610                 if (free_and_strdup(&arg_root_what, value) < 0)
 611                         return log_oom();
 612
 613         } else if (streq(key, "rootfstype") && value) {
 614
 615                 if (free_and_strdup(&arg_root_fstype, value) < 0)
 616                         return log_oom();
 617
 618         } else if (streq(key, "rootflags") && value) {
 619                 char *o;
 620
 621                 o = arg_root_options ?
 622                         strjoin(arg_root_options, ",", value, NULL) :
 623                         strdup(value);
 624                 if (!o)
 625                         return log_oom();
 626
 627                 free(arg_root_options);
 628                 arg_root_options = o;
 629
 630         } else if (streq(key, "mount.usr") && value) {
 631
 632                 if (free_and_strdup(&arg_usr_what, value) < 0)
 633                         return log_oom();
 634
 635         } else if (streq(key, "mount.usrfstype") && value) {
 636
 637                 if (free_and_strdup(&arg_usr_fstype, value) < 0)
 638                         return log_oom();
 639
 640         } else if (streq(key, "mount.usrflags") && value) {
 641                 char *o;
 642
 643                 o = arg_usr_options ?
 644                         strjoin(arg_usr_options, ",", value, NULL) :
 645                         strdup(value);
 646                 if (!o)
 647                         return log_oom();
 648
 649                 free(arg_usr_options);
 650                 arg_usr_options = o;
 651
 652         } else if (streq(key, "rw") && !value)
 653                 arg_root_rw = true;
 654         else if (streq(key, "ro") && !value)
 655                 arg_root_rw = false;
 656
 657         return 0;
 658 }
 659
 660 int main(int argc, char *argv[]) {
 661         int r = 0;
 662
 663         if (argc > 1 && argc != 4) {
 664                 log_error("This program takes three or no arguments.");
 665                 return EXIT_FAILURE;
 666         }
 667
 668         if (argc > 1)
 669                 arg_dest = argv[1];
 670
 671         log_set_target(LOG_TARGET_SAFE);
 672         log_parse_environment();
 673         log_open();
 674
 675         umask(0022);
 676
 677         r = parse_proc_cmdline(parse_proc_cmdline_item, NULL);
 678         if (r < 0)
 679                 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
 680
 681         /* Always honour root= and usr= in the kernel command line if we are in an initrd */
 682         if (in_initrd()) {
 683                 int k;
 684
 685                 r = add_sysroot_mount();
 686
 687                 k = add_sysroot_usr_mount();
 688                 if (k < 0)
 689                         r = k;
 690         } else
 691                 r = 0;
 692
 693         /* Honour /etc/fstab only when that's enabled */
 694         if (arg_fstab_enabled) {
 695                 int k;
 696
 697                 log_debug("Parsing /etc/fstab");
 698
 699                 /* Parse the local /etc/fstab, possibly from the initrd */
 700                 k = parse_fstab(false);
 701                 if (k < 0)
 702                         r = k;
 703
 704                 /* If running in the initrd also parse the /etc/fstab from the host */
 705                 if (in_initrd()) {
 706                         log_debug("Parsing /sysroot/etc/fstab");
 707
 708                         k = parse_fstab(true);
 709                         if (k < 0)
 710                                 r = k;
 711                 }
 712         }
 713
 714         free(arg_root_what);
 715         free(arg_root_fstype);
 716         free(arg_root_options);
 717
 718         free(arg_usr_what);
 719         free(arg_usr_fstype);
 720         free(arg_usr_options);
 721
 722         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 723 }