src/cryptsetup/cryptsetup-generator.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <sys/stat.h>
   6 #include <sys/types.h>
   7
   8 #include "alloc-util.h"
   9 #include "dropin.h"
  10 #include "escape.h"
  11 #include "fd-util.h"
  12 #include "fileio.h"
  13 #include "fstab-util.h"
  14 #include "generator.h"
  15 #include "hashmap.h"
  16 #include "id128-util.h"
  17 #include "log.h"
  18 #include "mkdir.h"
  19 #include "parse-util.h"
  20 #include "path-util.h"
  21 #include "proc-cmdline.h"
  22 #include "specifier.h"
  23 #include "string-util.h"
  24 #include "strv.h"
  25 #include "unit-name.h"
  26 #include "util.h"
  27
  28 typedef struct crypto_device {
  29         char *uuid;
  30         char *keyfile;
  31         char *keydev;
  32         char *name;
  33         char *options;
  34         bool create;
  35 } crypto_device;
  36
  37 static const char *arg_dest = NULL;
  38 static bool arg_enabled = true;
  39 static bool arg_read_crypttab = true;
  40 static bool arg_whitelist = false;
  41 static Hashmap *arg_disks = NULL;
  42 static char *arg_default_options = NULL;
  43 static char *arg_default_keyfile = NULL;
  44
  45 STATIC_DESTRUCTOR_REGISTER(arg_disks, hashmap_freep);
  46 STATIC_DESTRUCTOR_REGISTER(arg_default_options, freep);
  47 STATIC_DESTRUCTOR_REGISTER(arg_default_keyfile, freep);
  48
  49 static int split_keyspec(const char *keyspec, char **ret_keyfile, char **ret_keydev) {
  50         _cleanup_free_ char *keyfile = NULL, *keydev = NULL;
  51         const char *c;
  52
  53         assert(ret_keyfile);
  54         assert(ret_keydev);
  55
  56         if (!keyspec) {
  57                 *ret_keyfile = *ret_keydev = NULL;
  58                 return 0;
  59         }
  60
  61         c = strrchr(keyspec, ':');
  62         if (c) {
  63                 keyfile = strndup(keyspec, c-keyspec);
  64                 keydev = strdup(c + 1);
  65                 if (!keyfile || !keydev)
  66                         return log_oom();
  67         } else {
  68                 /* No keydev specified */
  69                 keyfile = strdup(keyspec);
  70                 keydev = NULL;
  71                 if (!keyfile)
  72                         return log_oom();
  73         }
  74
  75         *ret_keyfile = TAKE_PTR(keyfile);
  76         *ret_keydev = TAKE_PTR(keydev);
  77
  78         return 0;
  79 }
  80
  81 static int generate_keydev_mount(const char *name, const char *keydev, const char *keydev_timeout, bool canfail, char **unit, char **mount) {
  82         _cleanup_free_ char *u = NULL, *what = NULL, *where = NULL, *name_escaped = NULL, *device_unit = NULL;
  83         _cleanup_fclose_ FILE *f = NULL;
  84         int r;
  85         usec_t timeout_us;
  86
  87         assert(name);
  88         assert(keydev);
  89         assert(unit);
  90         assert(mount);
  91
  92         r = mkdir_parents("/run/systemd/cryptsetup", 0755);
  93         if (r < 0)
  94                 return r;
  95
  96         r = mkdir("/run/systemd/cryptsetup", 0700);
  97         if (r < 0 && errno != EEXIST)
  98                 return -errno;
  99
 100         name_escaped = cescape(name);
 101         if (!name_escaped)
 102                 return -ENOMEM;
 103
 104         where = strjoin("/run/systemd/cryptsetup/keydev-", name_escaped);
 105         if (!where)
 106                 return -ENOMEM;
 107
 108         r = mkdir(where, 0700);
 109         if (r < 0 && errno != EEXIST)
 110                 return -errno;
 111
 112         r = unit_name_from_path(where, ".mount", &u);
 113         if (r < 0)
 114                 return r;
 115
 116         r = generator_open_unit_file(arg_dest, NULL, u, &f);
 117         if (r < 0)
 118                 return r;
 119
 120         what = fstab_node_to_udev_node(keydev);
 121         if (!what)
 122                 return -ENOMEM;
 123
 124         fprintf(f,
 125                 "[Unit]\n"
 126                 "DefaultDependencies=no\n\n"
 127                 "[Mount]\n"
 128                 "What=%s\n"
 129                 "Where=%s\n"
 130                 "Options=ro%s\n", what, where, canfail ? ",nofail" : "");
 131
 132         if (keydev_timeout) {
 133                 r = parse_sec_fix_0(keydev_timeout, &timeout_us);
 134                 if (r >= 0) {
 135                         r = unit_name_from_path(what, ".device", &device_unit);
 136                         if (r < 0)
 137                                 return log_error_errno(r, "Failed to generate unit name: %m");
 138
 139                         r = write_drop_in_format(arg_dest, device_unit, 90, "device-timeout",
 140                                 "# Automatically generated by systemd-cryptsetup-generator \n\n"
 141                                 "[Unit]\nJobRunningTimeoutSec=%s", keydev_timeout);
 142                         if (r < 0)
 143                                 return log_error_errno(r, "Failed to write device drop-in: %m");
 144
 145                 } else
 146                         log_warning_errno(r, "Failed to parse %s, ignoring: %m", keydev_timeout);
 147
 148         }
 149
 150         r = fflush_and_check(f);
 151         if (r < 0)
 152                 return r;
 153
 154         *unit = TAKE_PTR(u);
 155         *mount = TAKE_PTR(where);
 156
 157         return 0;
 158 }
 159
 160 static int print_dependencies(FILE *f, const char* device_path) {
 161         int r;
 162
 163         if (STR_IN_SET(device_path, "-", "none"))
 164                 /* None, nothing to do */
 165                 return 0;
 166
 167         if (PATH_IN_SET(device_path, "/dev/urandom", "/dev/random", "/dev/hw_random")) {
 168                 /* RNG device, add random dep */
 169                 fputs("After=systemd-random-seed.service\n", f);
 170                 return 0;
 171         }
 172
 173         _cleanup_free_ char *udev_node = fstab_node_to_udev_node(device_path);
 174         if (!udev_node)
 175                 return log_oom();
 176
 177         if (path_equal(udev_node, "/dev/null"))
 178                 return 0;
 179
 180         if (path_startswith(udev_node, "/dev/")) {
 181                 /* We are dealing with a block device, add dependency for correspoding unit */
 182                 _cleanup_free_ char *unit = NULL;
 183
 184                 r = unit_name_from_path(udev_node, ".device", &unit);
 185                 if (r < 0)
 186                         return log_error_errno(r, "Failed to generate unit name: %m");
 187
 188                 fprintf(f, "After=%1$s\nRequires=%1$s\n", unit);
 189         } else {
 190                 /* Regular file, add mount dependency */
 191                 _cleanup_free_ char *escaped_path = specifier_escape(device_path);
 192                 if (!escaped_path)
 193                         return log_oom();
 194
 195                 fprintf(f, "RequiresMountsFor=%s\n", escaped_path);
 196         }
 197
 198         return 0;
 199 }
 200
 201 static int create_disk(
 202                 const char *name,
 203                 const char *device,
 204                 const char *password,
 205                 const char *keydev,
 206                 const char *options) {
 207
 208         _cleanup_free_ char *n = NULL, *d = NULL, *u = NULL, *e = NULL,
 209                 *keydev_mount = NULL, *keyfile_timeout_value = NULL, *password_escaped = NULL,
 210                 *filtered = NULL, *u_escaped = NULL, *filtered_escaped = NULL, *name_escaped = NULL, *header_path = NULL;
 211         _cleanup_fclose_ FILE *f = NULL;
 212         const char *dmname;
 213         bool noauto, nofail, tmp, swap, netdev;
 214         int r, detached_header, keyfile_can_timeout;
 215
 216         assert(name);
 217         assert(device);
 218
 219         noauto = fstab_test_yes_no_option(options, "noauto\0" "auto\0");
 220         nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0");
 221         tmp = fstab_test_option(options, "tmp\0");
 222         swap = fstab_test_option(options, "swap\0");
 223         netdev = fstab_test_option(options, "_netdev\0");
 224
 225         keyfile_can_timeout = fstab_filter_options(options, "keyfile-timeout\0", NULL, &keyfile_timeout_value, NULL);
 226         if (keyfile_can_timeout < 0)
 227                 return log_error_errno(keyfile_can_timeout, "Failed to parse keyfile-timeout= option value: %m");
 228
 229         detached_header = fstab_filter_options(options, "header\0", NULL, &header_path, NULL);
 230         if (detached_header < 0)
 231                 return log_error_errno(detached_header, "Failed to parse header= option value: %m");
 232
 233         if (tmp && swap)
 234                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 235                                        "Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.",
 236                                        name);
 237
 238         name_escaped = specifier_escape(name);
 239         if (!name_escaped)
 240                 return log_oom();
 241
 242         e = unit_name_escape(name);
 243         if (!e)
 244                 return log_oom();
 245
 246         u = fstab_node_to_udev_node(device);
 247         if (!u)
 248                 return log_oom();
 249
 250         r = unit_name_build("systemd-cryptsetup", e, ".service", &n);
 251         if (r < 0)
 252                 return log_error_errno(r, "Failed to generate unit name: %m");
 253
 254         u_escaped = specifier_escape(u);
 255         if (!u_escaped)
 256                 return log_oom();
 257
 258         r = unit_name_from_path(u, ".device", &d);
 259         if (r < 0)
 260                 return log_error_errno(r, "Failed to generate unit name: %m");
 261
 262         if (keydev && !password)
 263                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
 264                                        "Key device is specified, but path to the password file is missing.");
 265
 266         r = generator_open_unit_file(arg_dest, NULL, n, &f);
 267         if (r < 0)
 268                 return r;
 269
 270         fprintf(f,
 271                 "[Unit]\n"
 272                 "Description=Cryptography Setup for %%I\n"
 273                 "Documentation=man:crypttab(5) man:systemd-cryptsetup-generator(8) man:systemd-cryptsetup@.service(8)\n"
 274                 "SourcePath=/etc/crypttab\n"
 275                 "DefaultDependencies=no\n"
 276                 "Conflicts=umount.target\n"
 277                 "IgnoreOnIsolate=true\n"
 278                 "After=%s\n",
 279                 netdev ? "remote-fs-pre.target" : "cryptsetup-pre.target");
 280
 281         if (password) {
 282                 password_escaped = specifier_escape(password);
 283                 if (!password_escaped)
 284                         return log_oom();
 285         }
 286
 287         if (keydev) {
 288                 _cleanup_free_ char *unit = NULL, *p = NULL;
 289
 290                 r = generate_keydev_mount(name, keydev, keyfile_timeout_value, keyfile_can_timeout > 0, &unit, &keydev_mount);
 291                 if (r < 0)
 292                         return log_error_errno(r, "Failed to generate keydev mount unit: %m");
 293
 294                 p = path_join(keydev_mount, password_escaped);
 295                 if (!p)
 296                         return log_oom();
 297
 298                 free_and_replace(password_escaped, p);
 299
 300                 fprintf(f, "After=%s\n", unit);
 301                 if (keyfile_can_timeout > 0)
 302                         fprintf(f, "Wants=%s\n", unit);
 303                 else
 304                         fprintf(f, "Requires=%s\n", unit);
 305         }
 306
 307         if (!nofail)
 308                 fprintf(f,
 309                         "Before=%s\n",
 310                         netdev ? "remote-cryptsetup.target" : "cryptsetup.target");
 311
 312         if (password && !keydev) {
 313                 r = print_dependencies(f, password);
 314                 if (r < 0)
 315                         return r;
 316         }
 317
 318         /* Check if a header option was specified */
 319         if (detached_header > 0) {
 320                 r = print_dependencies(f, header_path);
 321                 if (r < 0)
 322                         return r;
 323         }
 324
 325         if (path_startswith(u, "/dev/")) {
 326                 fprintf(f,
 327                         "BindsTo=%s\n"
 328                         "After=%s\n"
 329                         "Before=umount.target\n",
 330                         d, d);
 331
 332                 if (swap)
 333                         fputs("Before=dev-mapper-%i.swap\n",
 334                               f);
 335         } else
 336                 /* For loopback devices, add systemd-tmpfiles-setup-dev.service
 337                    dependency to ensure that loopback support is available in
 338                    the kernel (/dev/loop-control needs to exist) */
 339                 fprintf(f,
 340                         "RequiresMountsFor=%s\n"
 341                         "Requires=systemd-tmpfiles-setup-dev.service\n"
 342                         "After=systemd-tmpfiles-setup-dev.service\n",
 343                         u_escaped);
 344
 345         r = generator_write_timeouts(arg_dest, device, name, options, &filtered);
 346         if (r < 0)
 347                 return r;
 348
 349         if (filtered) {
 350                 filtered_escaped = specifier_escape(filtered);
 351                 if (!filtered_escaped)
 352                         return log_oom();
 353         }
 354
 355         fprintf(f,
 356                 "\n[Service]\n"
 357                 "Type=oneshot\n"
 358                 "RemainAfterExit=yes\n"
 359                 "TimeoutSec=0\n" /* the binary handles timeouts anyway */
 360                 "KeyringMode=shared\n" /* make sure we can share cached keys among instances */
 361                 "OOMScoreAdjust=500\n" /* unlocking can allocate a lot of memory if Argon2 is used */
 362                 "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
 363                 "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
 364                 name_escaped, u_escaped, strempty(password_escaped), strempty(filtered_escaped),
 365                 name_escaped);
 366
 367         if (tmp)
 368                 fprintf(f,
 369                         "ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
 370                         name_escaped);
 371
 372         if (swap)
 373                 fprintf(f,
 374                         "ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
 375                         name_escaped);
 376
 377         if (keydev)
 378                 fprintf(f,
 379                         "ExecStartPost=-" UMOUNT_PATH " %s\n\n",
 380                         keydev_mount);
 381
 382         r = fflush_and_check(f);
 383         if (r < 0)
 384                 return log_error_errno(r, "Failed to write unit file %s: %m", n);
 385
 386         if (!noauto) {
 387                 r = generator_add_symlink(arg_dest,
 388                                           netdev ? "remote-cryptsetup.target" : "cryptsetup.target",
 389                                           nofail ? "wants" : "requires", n);
 390                 if (r < 0)
 391                         return r;
 392         }
 393
 394         dmname = strjoina("dev-mapper-", e, ".device");
 395         r = generator_add_symlink(arg_dest, dmname, "requires", n);
 396         if (r < 0)
 397                 return r;
 398
 399         if (!noauto && !nofail) {
 400                 r = write_drop_in(arg_dest, dmname, 90, "device-timeout",
 401                                   "# Automatically generated by systemd-cryptsetup-generator \n\n"
 402                                   "[Unit]\nJobTimeoutSec=0");
 403                 if (r < 0)
 404                         return log_error_errno(r, "Failed to write device drop-in: %m");
 405         }
 406
 407         return 0;
 408 }
 409
 410 static crypto_device* crypt_device_free(crypto_device *d) {
 411         if (!d)
 412                 return NULL;
 413
 414         free(d->uuid);
 415         free(d->keyfile);
 416         free(d->keydev);
 417         free(d->name);
 418         free(d->options);
 419         return mfree(d);
 420 }
 421
 422 static crypto_device *get_crypto_device(const char *uuid) {
 423         int r;
 424         crypto_device *d;
 425
 426         assert(uuid);
 427
 428         d = hashmap_get(arg_disks, uuid);
 429         if (!d) {
 430                 d = new0(struct crypto_device, 1);
 431                 if (!d)
 432                         return NULL;
 433
 434                 d->uuid = strdup(uuid);
 435                 if (!d->uuid)
 436                         return mfree(d);
 437
 438                 r = hashmap_put(arg_disks, d->uuid, d);
 439                 if (r < 0) {
 440                         free(d->uuid);
 441                         return mfree(d);
 442                 }
 443         }
 444
 445         return d;
 446 }
 447
 448 static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
 449         _cleanup_free_ char *uuid = NULL, *uuid_value = NULL;
 450         crypto_device *d;
 451         int r;
 452
 453         if (streq(key, "luks")) {
 454
 455                 r = value ? parse_boolean(value) : 1;
 456                 if (r < 0)
 457                         log_warning("Failed to parse luks= kernel command line switch %s. Ignoring.", value);
 458                 else
 459                         arg_enabled = r;
 460
 461         } else if (streq(key, "luks.crypttab")) {
 462
 463                 r = value ? parse_boolean(value) : 1;
 464                 if (r < 0)
 465                         log_warning("Failed to parse luks.crypttab= kernel command line switch %s. Ignoring.", value);
 466                 else
 467                         arg_read_crypttab = r;
 468
 469         } else if (streq(key, "luks.uuid")) {
 470
 471                 if (proc_cmdline_value_missing(key, value))
 472                         return 0;
 473
 474                 d = get_crypto_device(startswith(value, "luks-") ? value+5 : value);
 475                 if (!d)
 476                         return log_oom();
 477
 478                 d->create = arg_whitelist = true;
 479
 480         } else if (streq(key, "luks.options")) {
 481
 482                 if (proc_cmdline_value_missing(key, value))
 483                         return 0;
 484
 485                 r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value);
 486                 if (r == 2) {
 487                         d = get_crypto_device(uuid);
 488                         if (!d)
 489                                 return log_oom();
 490
 491                         free_and_replace(d->options, uuid_value);
 492                 } else if (free_and_strdup(&arg_default_options, value) < 0)
 493                         return log_oom();
 494
 495         } else if (streq(key, "luks.key")) {
 496                 size_t n;
 497                 _cleanup_free_ char *keyfile = NULL, *keydev = NULL;
 498                 const char *keyspec;
 499
 500                 if (proc_cmdline_value_missing(key, value))
 501                         return 0;
 502
 503                 n = strspn(value, LETTERS DIGITS "-");
 504                 if (value[n] != '=') {
 505                         if (free_and_strdup(&arg_default_keyfile, value) < 0)
 506                                  return log_oom();
 507                         return 0;
 508                 }
 509
 510                 uuid = strndup(value, n);
 511                 if (!uuid)
 512                         return log_oom();
 513
 514                 if (!id128_is_valid(uuid)) {
 515                         log_warning("Failed to parse luks.key= kernel command line switch. UUID is invalid, ignoring.");
 516                         return 0;
 517                 }
 518
 519                 d = get_crypto_device(uuid);
 520                 if (!d)
 521                         return log_oom();
 522
 523                 keyspec = value + n + 1;
 524                 r = split_keyspec(keyspec, &keyfile, &keydev);
 525                 if (r < 0)
 526                         return r;
 527
 528                 free_and_replace(d->keyfile, keyfile);
 529                 free_and_replace(d->keydev, keydev);
 530
 531         } else if (streq(key, "luks.name")) {
 532
 533                 if (proc_cmdline_value_missing(key, value))
 534                         return 0;
 535
 536                 r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value);
 537                 if (r == 2) {
 538                         d = get_crypto_device(uuid);
 539                         if (!d)
 540                                 return log_oom();
 541
 542                         d->create = arg_whitelist = true;
 543
 544                         free_and_replace(d->name, uuid_value);
 545                 } else
 546                         log_warning("Failed to parse luks name switch %s. Ignoring.", value);
 547         }
 548
 549         return 0;
 550 }
 551
 552 static int add_crypttab_devices(void) {
 553         _cleanup_fclose_ FILE *f = NULL;
 554         unsigned crypttab_line = 0;
 555         struct stat st;
 556         int r;
 557
 558         if (!arg_read_crypttab)
 559                 return 0;
 560
 561         r = fopen_unlocked("/etc/crypttab", "re", &f);
 562         if (r < 0) {
 563                 if (errno != ENOENT)
 564                         log_error_errno(errno, "Failed to open /etc/crypttab: %m");
 565                 return 0;
 566         }
 567
 568         if (fstat(fileno(f), &st) < 0) {
 569                 log_error_errno(errno, "Failed to stat /etc/crypttab: %m");
 570                 return 0;
 571         }
 572
 573         for (;;) {
 574                 _cleanup_free_ char *line = NULL, *name = NULL, *device = NULL, *keyspec = NULL, *options = NULL, *keyfile = NULL, *keydev = NULL;
 575                 crypto_device *d = NULL;
 576                 char *l, *uuid;
 577                 int k;
 578
 579                 r = read_line(f, LONG_LINE_MAX, &line);
 580                 if (r < 0)
 581                         return log_error_errno(r, "Failed to read /etc/crypttab: %m");
 582                 if (r == 0)
 583                         break;
 584
 585                 crypttab_line++;
 586
 587                 l = strstrip(line);
 588                 if (IN_SET(l[0], 0, '#'))
 589                         continue;
 590
 591                 k = sscanf(l, "%ms %ms %ms %ms", &name, &device, &keyspec, &options);
 592                 if (k < 2 || k > 4) {
 593                         log_error("Failed to parse /etc/crypttab:%u, ignoring.", crypttab_line);
 594                         continue;
 595                 }
 596
 597                 uuid = startswith(device, "UUID=");
 598                 if (!uuid)
 599                         uuid = path_startswith(device, "/dev/disk/by-uuid/");
 600                 if (!uuid)
 601                         uuid = startswith(name, "luks-");
 602                 if (uuid)
 603                         d = hashmap_get(arg_disks, uuid);
 604
 605                 if (arg_whitelist && !d) {
 606                         log_info("Not creating device '%s' because it was not specified on the kernel command line.", name);
 607                         continue;
 608                 }
 609
 610                 r = split_keyspec(keyspec, &keyfile, &keydev);
 611                 if (r < 0)
 612                         return r;
 613
 614                 r = create_disk(name, device, keyfile, keydev, (d && d->options) ? d->options : options);
 615                 if (r < 0)
 616                         return r;
 617
 618                 if (d)
 619                         d->create = false;
 620         }
 621
 622         return 0;
 623 }
 624
 625 static int add_proc_cmdline_devices(void) {
 626         int r;
 627         Iterator i;
 628         crypto_device *d;
 629
 630         HASHMAP_FOREACH(d, arg_disks, i) {
 631                 const char *options;
 632                 _cleanup_free_ char *device = NULL;
 633
 634                 if (!d->create)
 635                         continue;
 636
 637                 if (!d->name) {
 638                         d->name = strjoin("luks-", d->uuid);
 639                         if (!d->name)
 640                                 return log_oom();
 641                 }
 642
 643                 device = strjoin("UUID=", d->uuid);
 644                 if (!device)
 645                         return log_oom();
 646
 647                 if (d->options)
 648                         options = d->options;
 649                 else if (arg_default_options)
 650                         options = arg_default_options;
 651                 else
 652                         options = "timeout=0";
 653
 654                 r = create_disk(d->name, device, d->keyfile ?: arg_default_keyfile, d->keydev, options);
 655                 if (r < 0)
 656                         return r;
 657         }
 658
 659         return 0;
 660 }
 661
 662 DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(crypt_device_hash_ops, char, string_hash_func, string_compare_func,
 663                                               crypto_device, crypt_device_free);
 664
 665 static int run(const char *dest, const char *dest_early, const char *dest_late) {
 666         int r;
 667
 668         assert_se(arg_dest = dest);
 669
 670         arg_disks = hashmap_new(&crypt_device_hash_ops);
 671         if (!arg_disks)
 672                 return log_oom();
 673
 674         r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX);
 675         if (r < 0)
 676                 return log_warning_errno(r, "Failed to parse kernel command line: %m");
 677
 678         if (!arg_enabled)
 679                 return 0;
 680
 681         r = add_crypttab_devices();
 682         if (r < 0)
 683                 return r;
 684
 685         r = add_proc_cmdline_devices();
 686         if (r < 0)
 687                 return r;
 688
 689         return 0;
 690 }
 691
 692 DEFINE_MAIN_GENERATOR_FUNCTION(run);