src/gpt-auto-generator/gpt-auto-generator.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2013 Lennart Poettering
   6 ***/
   7
   8 #include <blkid.h>
   9 #include <stdlib.h>
  10 #include <sys/statfs.h>
  11 #include <unistd.h>
  12
  13 #include "libudev.h"
  14 #include "sd-id128.h"
  15
  16 #include "alloc-util.h"
  17 #include "blkid-util.h"
  18 #include "blockdev-util.h"
  19 #include "btrfs-util.h"
  20 #include "dirent-util.h"
  21 #include "dissect-image.h"
  22 #include "efivars.h"
  23 #include "fd-util.h"
  24 #include "fileio.h"
  25 #include "fstab-util.h"
  26 #include "generator.h"
  27 #include "gpt.h"
  28 #include "missing.h"
  29 #include "mkdir.h"
  30 #include "mount-util.h"
  31 #include "parse-util.h"
  32 #include "path-util.h"
  33 #include "proc-cmdline.h"
  34 #include "special.h"
  35 #include "specifier.h"
  36 #include "stat-util.h"
  37 #include "string-util.h"
  38 #include "udev-util.h"
  39 #include "unit-name.h"
  40 #include "util.h"
  41 #include "virt.h"
  42
  43 static const char *arg_dest = "/tmp";
  44 static bool arg_enabled = true;
  45 static bool arg_root_enabled = true;
  46 static bool arg_root_rw = false;
  47
  48 static int add_cryptsetup(const char *id, const char *what, bool rw, bool require, char **device) {
  49         _cleanup_free_ char *e = NULL, *n = NULL, *d = NULL, *id_escaped = NULL, *what_escaped = NULL;
  50         _cleanup_fclose_ FILE *f = NULL;
  51         const char *p;
  52         int r;
  53
  54         assert(id);
  55         assert(what);
  56
  57         r = unit_name_from_path(what, ".device", &d);
  58         if (r < 0)
  59                 return log_error_errno(r, "Failed to generate unit name: %m");
  60
  61         e = unit_name_escape(id);
  62         if (!e)
  63                 return log_oom();
  64
  65         r = unit_name_build("systemd-cryptsetup", e, ".service", &n);
  66         if (r < 0)
  67                 return log_error_errno(r, "Failed to generate unit name: %m");
  68
  69         id_escaped = specifier_escape(id);
  70         if (!id_escaped)
  71                 return log_oom();
  72
  73         what_escaped = specifier_escape(what);
  74         if (!what_escaped)
  75                 return log_oom();
  76
  77         p = strjoina(arg_dest, "/", n);
  78         f = fopen(p, "wxe");
  79         if (!f)
  80                 return log_error_errno(errno, "Failed to create unit file %s: %m", p);
  81
  82         fprintf(f,
  83                 "# Automatically generated by systemd-gpt-auto-generator\n\n"
  84                 "[Unit]\n"
  85                 "Description=Cryptography Setup for %%I\n"
  86                 "Documentation=man:systemd-gpt-auto-generator(8) man:systemd-cryptsetup@.service(8)\n"
  87                 "DefaultDependencies=no\n"
  88                 "Conflicts=umount.target\n"
  89                 "BindsTo=dev-mapper-%%i.device %s\n"
  90                 "Before=umount.target cryptsetup.target\n"
  91                 "After=%s\n"
  92                 "IgnoreOnIsolate=true\n"
  93                 "[Service]\n"
  94                 "Type=oneshot\n"
  95                 "RemainAfterExit=yes\n"
  96                 "TimeoutSec=0\n" /* the binary handles timeouts anyway */
  97                 "KeyringMode=shared\n" /* make sure we can share cached keys among instances */
  98                 "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '' '%s'\n"
  99                 "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
 100                 d, d,
 101                 id_escaped, what_escaped, rw ? "" : "read-only",
 102                 id_escaped);
 103
 104         r = fflush_and_check(f);
 105         if (r < 0)
 106                 return log_error_errno(r, "Failed to write file %s: %m", p);
 107
 108         r = generator_add_symlink(arg_dest, d, "wants", n);
 109         if (r < 0)
 110                 return r;
 111
 112         if (require) {
 113                 const char *dmname;
 114
 115                 r = generator_add_symlink(arg_dest, "cryptsetup.target", "requires", n);
 116                 if (r < 0)
 117                         return r;
 118
 119                 dmname = strjoina("dev-mapper-", e, ".device");
 120                 r = generator_add_symlink(arg_dest, dmname, "requires", n);
 121                 if (r < 0)
 122                         return r;
 123         }
 124
 125         p = strjoina(arg_dest, "/dev-mapper-", e, ".device.d/50-job-timeout-sec-0.conf");
 126         mkdir_parents_label(p, 0755);
 127         r = write_string_file(p,
 128                         "# Automatically generated by systemd-gpt-auto-generator\n\n"
 129                         "[Unit]\n"
 130                         "JobTimeoutSec=0\n",
 131                         WRITE_STRING_FILE_CREATE); /* the binary handles timeouts anyway */
 132         if (r < 0)
 133                 return log_error_errno(r, "Failed to write device drop-in: %m");
 134
 135         if (device) {
 136                 char *ret;
 137
 138                 ret = strappend("/dev/mapper/", id);
 139                 if (!ret)
 140                         return log_oom();
 141
 142                 *device = ret;
 143         }
 144
 145         return 0;
 146 }
 147
 148 static int add_mount(
 149                 const char *id,
 150                 const char *what,
 151                 const char *where,
 152                 const char *fstype,
 153                 bool rw,
 154                 const char *options,
 155                 const char *description,
 156                 const char *post) {
 157
 158         _cleanup_free_ char *unit = NULL, *crypto_what = NULL, *p = NULL;
 159         _cleanup_fclose_ FILE *f = NULL;
 160         int r;
 161
 162         /* Note that we don't apply specifier escaping on the input strings here, since we know they are not configured
 163          * externally, but all originate from our own sources here, and hence we know they contain no % characters that
 164          * could potentially be understood as specifiers. */
 165
 166         assert(id);
 167         assert(what);
 168         assert(where);
 169         assert(description);
 170
 171         log_debug("Adding %s: %s %s", where, what, strna(fstype));
 172
 173         if (streq_ptr(fstype, "crypto_LUKS")) {
 174
 175                 r = add_cryptsetup(id, what, rw, true, &crypto_what);
 176                 if (r < 0)
 177                         return r;
 178
 179                 what = crypto_what;
 180                 fstype = NULL;
 181         }
 182
 183         r = unit_name_from_path(where, ".mount", &unit);
 184         if (r < 0)
 185                 return log_error_errno(r, "Failed to generate unit name: %m");
 186
 187         p = strjoin(arg_dest, "/", unit);
 188         if (!p)
 189                 return log_oom();
 190
 191         f = fopen(p, "wxe");
 192         if (!f)
 193                 return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
 194
 195         fprintf(f,
 196                 "# Automatically generated by systemd-gpt-auto-generator\n\n"
 197                 "[Unit]\n"
 198                 "Description=%s\n"
 199                 "Documentation=man:systemd-gpt-auto-generator(8)\n",
 200                 description);
 201
 202         if (post)
 203                 fprintf(f, "Before=%s\n", post);
 204
 205         r = generator_write_fsck_deps(f, arg_dest, what, where, fstype);
 206         if (r < 0)
 207                 return r;
 208
 209         fprintf(f,
 210                 "\n"
 211                 "[Mount]\n"
 212                 "What=%s\n"
 213                 "Where=%s\n",
 214                 what, where);
 215
 216         if (fstype)
 217                 fprintf(f, "Type=%s\n", fstype);
 218
 219         if (options)
 220                 fprintf(f, "Options=%s,%s\n", options, rw ? "rw" : "ro");
 221         else
 222                 fprintf(f, "Options=%s\n", rw ? "rw" : "ro");
 223
 224         r = fflush_and_check(f);
 225         if (r < 0)
 226                 return log_error_errno(r, "Failed to write unit file %s: %m", p);
 227
 228         if (post)
 229                 return generator_add_symlink(arg_dest, post, "requires", unit);
 230         return 0;
 231 }
 232
 233 static int path_is_busy(const char *where) {
 234         int r;
 235
 236         /* already a mountpoint; generators run during reload */
 237         r = path_is_mount_point(where, NULL, AT_SYMLINK_FOLLOW);
 238         if (r > 0)
 239                 return false;
 240
 241         /* the directory might not exist on a stateless system */
 242         if (r == -ENOENT)
 243                 return false;
 244
 245         if (r < 0)
 246                 return log_warning_errno(r, "Cannot check if \"%s\" is a mount point: %m", where);
 247
 248         /* not a mountpoint but it contains files */
 249         r = dir_is_empty(where);
 250         if (r < 0)
 251                 return log_warning_errno(r, "Cannot check if \"%s\" is empty: %m", where);
 252         if (r > 0)
 253                 return false;
 254
 255         log_debug("\"%s\" already populated, ignoring.", where);
 256         return true;
 257 }
 258
 259 static int add_partition_mount(
 260                 DissectedPartition *p,
 261                 const char *id,
 262                 const char *where,
 263                 const char *description) {
 264
 265         int r;
 266         assert(p);
 267
 268         r = path_is_busy(where);
 269         if (r != 0)
 270                 return r < 0 ? r : 0;
 271
 272         return add_mount(
 273                         id,
 274                         p->node,
 275                         where,
 276                         p->fstype,
 277                         p->rw,
 278                         NULL,
 279                         description,
 280                         SPECIAL_LOCAL_FS_TARGET);
 281 }
 282
 283 static int add_swap(const char *path) {
 284         _cleanup_free_ char *name = NULL, *unit = NULL;
 285         _cleanup_fclose_ FILE *f = NULL;
 286         int r;
 287
 288         assert(path);
 289
 290         /* Disable the swap auto logic if at least one swap is defined in /etc/fstab, see #6192. */
 291         r = fstab_has_fstype("swap");
 292         if (r < 0)
 293                 return log_error_errno(r, "Failed to parse fstab: %m");
 294         if (r > 0) {
 295                 log_debug("swap specified in fstab, ignoring.");
 296                 return 0;
 297         }
 298
 299         log_debug("Adding swap: %s", path);
 300
 301         r = unit_name_from_path(path, ".swap", &name);
 302         if (r < 0)
 303                 return log_error_errno(r, "Failed to generate unit name: %m");
 304
 305         unit = strjoin(arg_dest, "/", name);
 306         if (!unit)
 307                 return log_oom();
 308
 309         f = fopen(unit, "wxe");
 310         if (!f)
 311                 return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
 312
 313         fprintf(f,
 314                 "# Automatically generated by systemd-gpt-auto-generator\n\n"
 315                 "[Unit]\n"
 316                 "Description=Swap Partition\n"
 317                 "Documentation=man:systemd-gpt-auto-generator(8)\n\n"
 318                 "[Swap]\n"
 319                 "What=%s\n",
 320                 path);
 321
 322         r = fflush_and_check(f);
 323         if (r < 0)
 324                 return log_error_errno(r, "Failed to write unit file %s: %m", unit);
 325
 326         return generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET, "wants", name);
 327 }
 328
 329 #if ENABLE_EFI
 330 static int add_automount(
 331                 const char *id,
 332                 const char *what,
 333                 const char *where,
 334                 const char *fstype,
 335                 bool rw,
 336                 const char *options,
 337                 const char *description,
 338                 usec_t timeout) {
 339
 340         _cleanup_free_ char *unit = NULL;
 341         _cleanup_fclose_ FILE *f = NULL;
 342         const char *opt = "noauto", *p;
 343         int r;
 344
 345         assert(id);
 346         assert(where);
 347         assert(description);
 348
 349         if (options)
 350                 opt = strjoina(options, ",", opt);
 351
 352         r = add_mount(id,
 353                       what,
 354                       where,
 355                       fstype,
 356                       rw,
 357                       opt,
 358                       description,
 359                       NULL);
 360         if (r < 0)
 361                 return r;
 362
 363         r = unit_name_from_path(where, ".automount", &unit);
 364         if (r < 0)
 365                 return log_error_errno(r, "Failed to generate unit name: %m");
 366
 367         p = strjoina(arg_dest, "/", unit);
 368         f = fopen(p, "wxe");
 369         if (!f)
 370                 return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
 371
 372         fprintf(f,
 373                 "# Automatically generated by systemd-gpt-auto-generator\n\n"
 374                 "[Unit]\n"
 375                 "Description=%s\n"
 376                 "Documentation=man:systemd-gpt-auto-generator(8)\n"
 377                 "[Automount]\n"
 378                 "Where=%s\n"
 379                 "TimeoutIdleSec="USEC_FMT"\n",
 380                 description,
 381                 where,
 382                 timeout / USEC_PER_SEC);
 383
 384         r = fflush_and_check(f);
 385         if (r < 0)
 386                 return log_error_errno(r, "Failed to write unit file %s: %m", p);
 387
 388         return generator_add_symlink(arg_dest, SPECIAL_LOCAL_FS_TARGET, "wants", unit);
 389 }
 390
 391 static int add_esp(DissectedPartition *p) {
 392         const char *esp;
 393         int r;
 394
 395         assert(p);
 396
 397         if (in_initrd()) {
 398                 log_debug("In initrd, ignoring the ESP.");
 399                 return 0;
 400         }
 401
 402         /* If /efi exists we'll use that. Otherwise we'll use /boot, as that's usually the better choice */
 403         esp = access("/efi/", F_OK) >= 0 ? "/efi" : "/boot";
 404
 405         /* We create an .automount which is not overridden by the .mount from the fstab generator. */
 406         r = fstab_is_mount_point(esp);
 407         if (r < 0)
 408                 return log_error_errno(r, "Failed to parse fstab: %m");
 409         if (r > 0) {
 410                 log_debug("%s specified in fstab, ignoring.", esp);
 411                 return 0;
 412         }
 413
 414         r = path_is_busy(esp);
 415         if (r != 0)
 416                 return r < 0 ? r : 0;
 417
 418         if (is_efi_boot()) {
 419                 sd_id128_t loader_uuid;
 420
 421                 /* If this is an EFI boot, be extra careful, and only mount the ESP if it was the ESP used for booting. */
 422
 423                 r = efi_loader_get_device_part_uuid(&loader_uuid);
 424                 if (r == -ENOENT) {
 425                         log_debug("EFI loader partition unknown.");
 426                         return 0;
 427                 }
 428                 if (r < 0)
 429                         return log_error_errno(r, "Failed to read ESP partition UUID: %m");
 430
 431                 if (!sd_id128_equal(p->uuid, loader_uuid)) {
 432                         log_debug("Partition for %s does not appear to be the partition we are booted from.", esp);
 433                         return 0;
 434                 }
 435         } else
 436                 log_debug("Not an EFI boot, skipping ESP check.");
 437
 438         return add_automount("boot",
 439                              p->node,
 440                              esp,
 441                              p->fstype,
 442                              true,
 443                              "umask=0077",
 444                              "EFI System Partition Automount",
 445                              120 * USEC_PER_SEC);
 446 }
 447 #else
 448 static int add_esp(DissectedPartition *p) {
 449         return 0;
 450 }
 451 #endif
 452
 453 static int open_parent(dev_t devnum, int *ret) {
 454         _cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
 455         _cleanup_(udev_unrefp) struct udev *udev = NULL;
 456         const char *name, *devtype, *node;
 457         struct udev_device *parent;
 458         dev_t pn;
 459         int fd;
 460
 461         assert(ret);
 462
 463         udev = udev_new();
 464         if (!udev)
 465                 return log_oom();
 466
 467         d = udev_device_new_from_devnum(udev, 'b', devnum);
 468         if (!d)
 469                 return log_oom();
 470
 471         name = udev_device_get_devnode(d);
 472         if (!name)
 473                 name = udev_device_get_syspath(d);
 474         if (!name) {
 475                 log_debug("Device %u:%u does not have a name, ignoring.", major(devnum), minor(devnum));
 476                 goto not_found;
 477         }
 478
 479         parent = udev_device_get_parent(d);
 480         if (!parent) {
 481                 log_debug("%s: not a partitioned device, ignoring.", name);
 482                 goto not_found;
 483         }
 484
 485         /* Does it have a devtype? */
 486         devtype = udev_device_get_devtype(parent);
 487         if (!devtype) {
 488                 log_debug("%s: parent doesn't have a device type, ignoring.", name);
 489                 goto not_found;
 490         }
 491
 492         /* Is this a disk or a partition? We only care for disks... */
 493         if (!streq(devtype, "disk")) {
 494                 log_debug("%s: parent isn't a raw disk, ignoring.", name);
 495                 goto not_found;
 496         }
 497
 498         /* Does it have a device node? */
 499         node = udev_device_get_devnode(parent);
 500         if (!node) {
 501                 log_debug("%s: parent device does not have device node, ignoring.", name);
 502                 goto not_found;
 503         }
 504
 505         log_debug("%s: root device %s.", name, node);
 506
 507         pn = udev_device_get_devnum(parent);
 508         if (major(pn) == 0) {
 509                 log_debug("%s: parent device is not a proper block device, ignoring.", name);
 510                 goto not_found;
 511         }
 512
 513         fd = open(node, O_RDONLY|O_CLOEXEC|O_NOCTTY);
 514         if (fd < 0)
 515                 return log_error_errno(errno, "Failed to open %s: %m", node);
 516
 517         *ret = fd;
 518         return 1;
 519
 520 not_found:
 521         *ret = -1;
 522         return 0;
 523 }
 524
 525 static int enumerate_partitions(dev_t devnum) {
 526
 527         _cleanup_close_ int fd = -1;
 528         _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL;
 529         int r, k;
 530
 531         r = open_parent(devnum, &fd);
 532         if (r <= 0)
 533                 return r;
 534
 535         r = dissect_image(fd, NULL, 0, DISSECT_IMAGE_GPT_ONLY, &m);
 536         if (r == -ENOPKG) {
 537                 log_debug_errno(r, "No suitable partition table found, ignoring.");
 538                 return 0;
 539         }
 540         if (r < 0)
 541                 return log_error_errno(r, "Failed to dissect: %m");
 542
 543         if (m->partitions[PARTITION_SWAP].found) {
 544                 k = add_swap(m->partitions[PARTITION_SWAP].node);
 545                 if (k < 0)
 546                         r = k;
 547         }
 548
 549         if (m->partitions[PARTITION_ESP].found) {
 550                 k = add_esp(m->partitions + PARTITION_ESP);
 551                 if (k < 0)
 552                         r = k;
 553         }
 554
 555         if (m->partitions[PARTITION_HOME].found) {
 556                 k = add_partition_mount(m->partitions + PARTITION_HOME, "home", "/home", "Home Partition");
 557                 if (k < 0)
 558                         r = k;
 559         }
 560
 561         if (m->partitions[PARTITION_SRV].found) {
 562                 k = add_partition_mount(m->partitions + PARTITION_SRV, "srv", "/srv", "Server Data Partition");
 563                 if (k < 0)
 564                         r = k;
 565         }
 566
 567         return r;
 568 }
 569
 570 static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
 571         int r;
 572
 573         assert(key);
 574
 575         if (STR_IN_SET(key, "systemd.gpt_auto", "rd.systemd.gpt_auto")) {
 576
 577                 r = value ? parse_boolean(value) : 1;
 578                 if (r < 0)
 579                         log_warning("Failed to parse gpt-auto switch \"%s\". Ignoring.", value);
 580                 else
 581                         arg_enabled = r;
 582
 583         } else if (streq(key, "root")) {
 584
 585                 if (proc_cmdline_value_missing(key, value))
 586                         return 0;
 587
 588                 /* Disable root disk logic if there's a root= value
 589                  * specified (unless it happens to be "gpt-auto") */
 590
 591                 arg_root_enabled = streq(value, "gpt-auto");
 592
 593         } else if (streq(key, "roothash")) {
 594
 595                 if (proc_cmdline_value_missing(key, value))
 596                         return 0;
 597
 598                 /* Disable root disk logic if there's roothash= defined (i.e. verity enabled) */
 599
 600                 arg_root_enabled = false;
 601
 602         } else if (streq(key, "rw") && !value)
 603                 arg_root_rw = true;
 604         else if (streq(key, "ro") && !value)
 605                 arg_root_rw = false;
 606
 607         return 0;
 608 }
 609
 610 #if ENABLE_EFI
 611 static int add_root_cryptsetup(void) {
 612
 613         /* If a device /dev/gpt-auto-root-luks appears, then make it pull in systemd-cryptsetup-root.service, which
 614          * sets it up, and causes /dev/gpt-auto-root to appear which is all we are looking for. */
 615
 616         return add_cryptsetup("root", "/dev/gpt-auto-root-luks", true, false, NULL);
 617 }
 618 #endif
 619
 620 static int add_root_mount(void) {
 621
 622 #if ENABLE_EFI
 623         int r;
 624
 625         if (!is_efi_boot()) {
 626                 log_debug("Not a EFI boot, not creating root mount.");
 627                 return 0;
 628         }
 629
 630         r = efi_loader_get_device_part_uuid(NULL);
 631         if (r == -ENOENT) {
 632                 log_debug("EFI loader partition unknown, exiting.");
 633                 return 0;
 634         } else if (r < 0)
 635                 return log_error_errno(r, "Failed to read ESP partition UUID: %m");
 636
 637         /* OK, we have an ESP partition, this is fantastic, so let's
 638          * wait for a root device to show up. A udev rule will create
 639          * the link for us under the right name. */
 640
 641         if (in_initrd()) {
 642                 r = generator_write_initrd_root_device_deps(arg_dest, "/dev/gpt-auto-root");
 643                 if (r < 0)
 644                         return 0;
 645
 646                 r = add_root_cryptsetup();
 647                 if (r < 0)
 648                         return r;
 649         }
 650
 651         return add_mount(
 652                         "root",
 653                         "/dev/gpt-auto-root",
 654                         in_initrd() ? "/sysroot" : "/",
 655                         NULL,
 656                         arg_root_rw,
 657                         NULL,
 658                         "Root Partition",
 659                         in_initrd() ? SPECIAL_INITRD_ROOT_FS_TARGET : SPECIAL_LOCAL_FS_TARGET);
 660 #else
 661         return 0;
 662 #endif
 663 }
 664
 665 static int add_mounts(void) {
 666         dev_t devno;
 667         int r;
 668
 669         r = get_block_device_harder("/", &devno);
 670         if (r < 0)
 671                 return log_error_errno(r, "Failed to determine block device of root file system: %m");
 672         if (r == 0) {
 673                 r = get_block_device_harder("/usr", &devno);
 674                 if (r < 0)
 675                         return log_error_errno(r, "Failed to determine block device of /usr file system: %m");
 676                 if (r == 0) {
 677                         log_debug("Neither root nor /usr file system are on a (single) block device.");
 678                         return 0;
 679                 }
 680         }
 681
 682         return enumerate_partitions(devno);
 683 }
 684
 685 int main(int argc, char *argv[]) {
 686         int r, k;
 687
 688         if (argc > 1 && argc != 4) {
 689                 log_error("This program takes three or no arguments.");
 690                 return EXIT_FAILURE;
 691         }
 692
 693         if (argc > 1)
 694                 arg_dest = argv[3];
 695
 696         log_set_prohibit_ipc(true);
 697         log_set_target(LOG_TARGET_AUTO);
 698         log_parse_environment();
 699         log_open();
 700
 701         umask(0022);
 702
 703         if (detect_container() > 0) {
 704                 log_debug("In a container, exiting.");
 705                 return EXIT_SUCCESS;
 706         }
 707
 708         r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0);
 709         if (r < 0)
 710                 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
 711
 712         if (!arg_enabled) {
 713                 log_debug("Disabled, exiting.");
 714                 return EXIT_SUCCESS;
 715         }
 716
 717         if (arg_root_enabled)
 718                 r = add_root_mount();
 719         else
 720                 r = 0;
 721
 722         if (!in_initrd()) {
 723                 k = add_mounts();
 724                 if (k < 0)
 725                         r = k;
 726         }
 727
 728         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 729 }