block.c

   1 /*
   2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #define _GNU_SOURCE
  16 #include <getopt.h>
  17 #include <stdio.h>
  18 #include <unistd.h>
  19 #include <syslog.h>
  20 #include <libgen.h>
  21 #include <glob.h>
  22 #include <dirent.h>
  23 #include <stdarg.h>
  24 #include <string.h>
  25 #include <errno.h>
  26
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <sys/swap.h>
  30 #include <sys/mount.h>
  31 #include <sys/wait.h>
  32
  33 #include <linux/fs.h>
  34
  35 #include <uci.h>
  36 #include <uci_blob.h>
  37
  38 #include <libubox/ulog.h>
  39 #include <libubox/list.h>
  40 #include <libubox/vlist.h>
  41 #include <libubox/blobmsg_json.h>
  42 #include <libubox/avl-cmp.h>
  43
  44 #include "probe.h"
  45
  46 #ifdef UBIFS_EXTROOT
  47 #include "libubi/libubi.h"
  48 #endif
  49
  50 enum {
  51         TYPE_MOUNT,
  52         TYPE_SWAP,
  53 };
  54
  55 struct mount {
  56         struct vlist_node node;
  57         int type;
  58
  59         char *target;
  60         char *path;
  61         char *options;
  62         uint32_t flags;
  63         char *uuid;
  64         char *label;
  65         char *device;
  66         int extroot;
  67         int overlay;
  68         int disabled_fsck;
  69         unsigned int prio;
  70 };
  71
  72 static struct vlist_tree mounts;
  73 static struct blob_buf b;
  74 static LIST_HEAD(devices);
  75 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs;
  76 static unsigned int delay_root;
  77
  78 enum {
  79         CFG_ANON_MOUNT,
  80         CFG_ANON_SWAP,
  81         CFG_AUTO_MOUNT,
  82         CFG_AUTO_SWAP,
  83         CFG_DELAY_ROOT,
  84         CFG_CHECK_FS,
  85         __CFG_MAX
  86 };
  87
  88 static const struct blobmsg_policy config_policy[__CFG_MAX] = {
  89         [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 },
  90         [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 },
  91         [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 },
  92         [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 },
  93         [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 },
  94         [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 },
  95 };
  96
  97 enum {
  98         MOUNT_UUID,
  99         MOUNT_LABEL,
 100         MOUNT_ENABLE,
 101         MOUNT_TARGET,
 102         MOUNT_DEVICE,
 103         MOUNT_OPTIONS,
 104         __MOUNT_MAX
 105 };
 106
 107 static const struct uci_blob_param_list config_attr_list = {
 108         .n_params = __CFG_MAX,
 109         .params = config_policy,
 110 };
 111
 112 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = {
 113         [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
 114         [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
 115         [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
 116         [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
 117         [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING },
 118         [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
 119 };
 120
 121 static const struct uci_blob_param_list mount_attr_list = {
 122         .n_params = __MOUNT_MAX,
 123         .params = mount_policy,
 124 };
 125
 126 enum {
 127         SWAP_ENABLE,
 128         SWAP_UUID,
 129         SWAP_LABEL,
 130         SWAP_DEVICE,
 131         SWAP_PRIO,
 132         __SWAP_MAX
 133 };
 134
 135 static const struct blobmsg_policy swap_policy[__SWAP_MAX] = {
 136         [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
 137         [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
 138         [SWAP_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
 139         [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
 140         [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
 141 };
 142
 143 static const struct uci_blob_param_list swap_attr_list = {
 144         .n_params = __SWAP_MAX,
 145         .params = swap_policy,
 146 };
 147
 148 struct mount_flag {
 149         const char *name;
 150         int32_t flag;
 151 };
 152
 153 static const struct mount_flag mount_flags[] = {
 154         { "sync",               MS_SYNCHRONOUS  },
 155         { "async",              ~MS_SYNCHRONOUS },
 156         { "dirsync",            MS_DIRSYNC      },
 157         { "mand",               MS_MANDLOCK     },
 158         { "nomand",             ~MS_MANDLOCK    },
 159         { "atime",              ~MS_NOATIME     },
 160         { "noatime",            MS_NOATIME      },
 161         { "dev",                ~MS_NODEV       },
 162         { "nodev",              MS_NODEV        },
 163         { "diratime",           ~MS_NODIRATIME  },
 164         { "nodiratime",         MS_NODIRATIME   },
 165         { "exec",               ~MS_NOEXEC      },
 166         { "noexec",             MS_NOEXEC       },
 167         { "suid",               ~MS_NOSUID      },
 168         { "nosuid",             MS_NOSUID       },
 169         { "rw",                 ~MS_RDONLY      },
 170         { "ro",                 MS_RDONLY       },
 171         { "relatime",           MS_RELATIME     },
 172         { "norelatime",         ~MS_RELATIME    },
 173         { "strictatime",        MS_STRICTATIME  },
 174         { "acl",                MS_POSIXACL     },
 175         { "noacl",              ~MS_POSIXACL    },
 176         { "nouser_xattr",       MS_NOUSER       },
 177         { "user_xattr",         ~MS_NOUSER      },
 178 };
 179
 180 static char *blobmsg_get_strdup(struct blob_attr *attr)
 181 {
 182         if (!attr)
 183                 return NULL;
 184
 185         return strdup(blobmsg_get_string(attr));
 186 }
 187
 188 static char *blobmsg_get_basename(struct blob_attr *attr)
 189 {
 190         if (!attr)
 191                 return NULL;
 192
 193         return strdup(basename(blobmsg_get_string(attr)));
 194 }
 195
 196 static void parse_mount_options(struct mount *m, char *optstr)
 197 {
 198         int i;
 199         bool is_flag;
 200         char *p, *opts, *last;
 201
 202         m->flags = 0;
 203         m->options = NULL;
 204
 205         if (!optstr || !*optstr)
 206                 return;
 207
 208         m->options = opts = calloc(1, strlen(optstr) + 1);
 209
 210         if (!m->options)
 211                 return;
 212
 213         p = last = optstr;
 214
 215         do {
 216                 p = strchr(p, ',');
 217
 218                 if (p)
 219                         *p++ = 0;
 220
 221                 for (i = 0, is_flag = false; i < ARRAY_SIZE(mount_flags); i++) {
 222                         if (!strcmp(last, mount_flags[i].name)) {
 223                                 if (mount_flags[i].flag < 0)
 224                                         m->flags &= (uint32_t)mount_flags[i].flag;
 225                                 else
 226                                         m->flags |= (uint32_t)mount_flags[i].flag;
 227                                 is_flag = true;
 228                                 break;
 229                         }
 230                 }
 231
 232                 if (!is_flag)
 233                         opts += sprintf(opts, "%s%s", (opts > m->options) ? "," : "", last);
 234
 235                 last = p;
 236
 237         } while (p);
 238
 239         free(optstr);
 240 }
 241
 242 static int mount_add(struct uci_section *s)
 243 {
 244         struct blob_attr *tb[__MOUNT_MAX] = { 0 };
 245         struct mount *m;
 246
 247         blob_buf_init(&b, 0);
 248         uci_to_blob(&b, s, &mount_attr_list);
 249         blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head));
 250
 251         if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE])
 252                 return -1;
 253
 254         if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE]))
 255                 return -1;
 256
 257         m = malloc(sizeof(struct mount));
 258         m->type = TYPE_MOUNT;
 259         m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]);
 260         m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
 261         m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
 262         m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]);
 263
 264         parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS]));
 265
 266         m->overlay = m->extroot = 0;
 267         if (m->target && !strcmp(m->target, "/"))
 268                 m->extroot = 1;
 269         if (m->target && !strcmp(m->target, "/overlay"))
 270                 m->extroot = m->overlay = 1;
 271
 272         if (m->target && *m->target != '/') {
 273                 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n",
 274                           s->e.name, m->target);
 275                 free(m);
 276                 return -1;
 277         }
 278
 279         if (m->uuid)
 280                 vlist_add(&mounts, &m->node, m->uuid);
 281         else if (m->label)
 282                 vlist_add(&mounts, &m->node, m->label);
 283         else if (m->device)
 284                 vlist_add(&mounts, &m->node, m->device);
 285
 286         return 0;
 287 }
 288
 289 static int swap_add(struct uci_section *s)
 290 {
 291         struct blob_attr *tb[__SWAP_MAX] = { 0 };
 292         struct mount *m;
 293
 294         blob_buf_init(&b, 0);
 295         uci_to_blob(&b, s, &swap_attr_list);
 296         blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head));
 297
 298         if (!tb[SWAP_UUID] && !tb[SWAP_LABEL] && !tb[SWAP_DEVICE])
 299                 return -1;
 300
 301         m = malloc(sizeof(struct mount));
 302         memset(m, 0, sizeof(struct mount));
 303         m->type = TYPE_SWAP;
 304         m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]);
 305         m->label = blobmsg_get_strdup(tb[SWAP_LABEL]);
 306         m->device = blobmsg_get_basename(tb[SWAP_DEVICE]);
 307         if (tb[SWAP_PRIO])
 308                 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]);
 309         if (m->prio)
 310                 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
 311
 312         if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE])) {
 313                 /* store complete swap path */
 314                 if (tb[SWAP_DEVICE])
 315                         m->target = blobmsg_get_strdup(tb[SWAP_DEVICE]);
 316
 317                 if (m->uuid)
 318                         vlist_add(&mounts, &m->node, m->uuid);
 319                 else if (m->label)
 320                         vlist_add(&mounts, &m->node, m->label);
 321                 else if (m->device)
 322                         vlist_add(&mounts, &m->node, m->device);
 323         }
 324
 325         return 0;
 326 }
 327
 328 static int global_add(struct uci_section *s)
 329 {
 330         struct blob_attr *tb[__CFG_MAX] = { 0 };
 331
 332         blob_buf_init(&b, 0);
 333         uci_to_blob(&b, s, &config_attr_list);
 334         blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head));
 335
 336         if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT]))
 337                 anon_mount = 1;
 338         if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP]))
 339                 anon_swap = 1;
 340
 341         if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT]))
 342                 auto_mount = 1;
 343         if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP]))
 344                 auto_swap = 1;
 345
 346         if (tb[CFG_DELAY_ROOT])
 347                 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]);
 348
 349         if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS]))
 350                 check_fs = 1;
 351
 352         return 0;
 353 }
 354
 355 static struct mount* find_swap(const char *uuid, const char *label, const char *device)
 356 {
 357         struct mount *m;
 358
 359         vlist_for_each_element(&mounts, m, node) {
 360                 if (m->type != TYPE_SWAP)
 361                         continue;
 362                 if (uuid && m->uuid && !strcasecmp(m->uuid, uuid))
 363                         return m;
 364                 if (label && m->label && !strcmp(m->label, label))
 365                         return m;
 366                 if (device && m->device && !strcmp(m->device, device))
 367                         return m;
 368         }
 369
 370         return NULL;
 371 }
 372
 373 static struct mount* find_block(const char *uuid, const char *label, const char *device,
 374                                 const char *target)
 375 {
 376         struct mount *m;
 377
 378         vlist_for_each_element(&mounts, m, node) {
 379                 if (m->type != TYPE_MOUNT)
 380                         continue;
 381                 if (m->uuid && uuid && !strcasecmp(m->uuid, uuid))
 382                         return m;
 383                 if (m->label && label && !strcmp(m->label, label))
 384                         return m;
 385                 if (m->target && target && !strcmp(m->target, target))
 386                         return m;
 387                 if (m->device && device && !strcmp(m->device, device))
 388                         return m;
 389         }
 390
 391         return NULL;
 392 }
 393
 394 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new,
 395                           struct vlist_node *node_old)
 396 {
 397 }
 398
 399 static struct uci_package * config_try_load(struct uci_context *ctx, char *path)
 400 {
 401         char *file = basename(path);
 402         char *dir = dirname(path);
 403         char *err;
 404         struct uci_package *pkg;
 405
 406         uci_set_confdir(ctx, dir);
 407         ULOG_INFO("attempting to load %s/%s\n", dir, file);
 408
 409         if (uci_load(ctx, file, &pkg)) {
 410                 uci_get_errorstr(ctx, &err, file);
 411                 ULOG_ERR("unable to load configuration (%s)\n", err);
 412
 413                 free(err);
 414                 return NULL;
 415         }
 416
 417         return pkg;
 418 }
 419
 420 static int config_load(char *cfg)
 421 {
 422         struct uci_context *ctx = uci_alloc_context();
 423         struct uci_package *pkg = NULL;
 424         struct uci_element *e;
 425         char path[64];
 426
 427         vlist_init(&mounts, avl_strcmp, mounts_update);
 428
 429         if (cfg) {
 430                 snprintf(path, sizeof(path), "%s/upper/etc/config/fstab", cfg);
 431                 pkg = config_try_load(ctx, path);
 432
 433                 if (!pkg) {
 434                         snprintf(path, sizeof(path), "%s/etc/config/fstab", cfg);
 435                         pkg = config_try_load(ctx, path);
 436                 }
 437         }
 438
 439         if (!pkg) {
 440                 snprintf(path, sizeof(path), "/etc/config/fstab");
 441                 pkg = config_try_load(ctx, path);
 442         }
 443
 444         if (!pkg) {
 445                 ULOG_ERR("no usable configuration\n");
 446                 return -1;
 447         }
 448
 449         vlist_update(&mounts);
 450         uci_foreach_element(&pkg->sections, e) {
 451                 struct uci_section *s = uci_to_section(e);
 452
 453                 if (!strcmp(s->type, "mount"))
 454                         mount_add(s);
 455                 if (!strcmp(s->type, "swap"))
 456                         swap_add(s);
 457                 if (!strcmp(s->type, "global"))
 458                         global_add(s);
 459         }
 460         vlist_flush(&mounts);
 461
 462         return 0;
 463 }
 464
 465 static struct probe_info* _probe_path(char *path)
 466 {
 467         struct probe_info *pr;
 468         char tmppath[64];
 469
 470         /* skip ubi device if ubiblock device is present */
 471         if (path[5] == 'u' && path[6] == 'b' && path[7] == 'i' &&
 472             path[8] >= '0' && path[8] <= '9' ) {
 473                 snprintf(tmppath, sizeof(tmppath), "/dev/ubiblock%s", path + 8);
 474                 list_for_each_entry(pr, &devices, list)
 475                         if (!strcasecmp(pr->dev, tmppath))
 476                                 return NULL;
 477         }
 478
 479         return probe_path(path);
 480 }
 481
 482 static int _cache_load(const char *path)
 483 {
 484         int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
 485         int j;
 486         glob_t gl;
 487
 488         if (glob(path, gl_flags, NULL, &gl) < 0)
 489                 return -1;
 490
 491         for (j = 0; j < gl.gl_pathc; j++) {
 492                 struct probe_info *pr = _probe_path(gl.gl_pathv[j]);
 493                 if (pr)
 494                         list_add_tail(&pr->list, &devices);
 495         }
 496
 497         globfree(&gl);
 498
 499         return 0;
 500 }
 501
 502 static void cache_load(int mtd)
 503 {
 504         if (mtd) {
 505                 _cache_load("/dev/mtdblock*");
 506                 _cache_load("/dev/ubiblock*");
 507                 _cache_load("/dev/ubi[0-9]*");
 508         }
 509         _cache_load("/dev/loop*");
 510         _cache_load("/dev/mmcblk*");
 511         _cache_load("/dev/sd*");
 512         _cache_load("/dev/hd*");
 513         _cache_load("/dev/md*");
 514         _cache_load("/dev/vd*");
 515         _cache_load("/dev/mapper/*");
 516 }
 517
 518
 519 static int print_block_uci(struct probe_info *pr)
 520 {
 521         if (!strcmp(pr->type, "swap")) {
 522                 printf("config 'swap'\n");
 523         } else {
 524                 printf("config 'mount'\n");
 525                 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
 526         }
 527         if (pr->uuid)
 528                 printf("\toption\tuuid\t'%s'\n", pr->uuid);
 529         else
 530                 printf("\toption\tdevice\t'%s'\n", pr->dev);
 531         printf("\toption\tenabled\t'0'\n\n");
 532
 533         return 0;
 534 }
 535
 536 static struct probe_info* find_block_info(char *uuid, char *label, char *path)
 537 {
 538         struct probe_info *pr = NULL;
 539
 540         if (uuid)
 541                 list_for_each_entry(pr, &devices, list)
 542                         if (pr->uuid && !strcasecmp(pr->uuid, uuid))
 543                                 return pr;
 544
 545         if (label)
 546                 list_for_each_entry(pr, &devices, list)
 547                         if (pr->label && !strcmp(pr->label, label))
 548                                 return pr;
 549
 550         if (path)
 551                 list_for_each_entry(pr, &devices, list)
 552                         if (pr->dev && !strcmp(basename(pr->dev), basename(path)))
 553                                 return pr;
 554
 555         return NULL;
 556 }
 557
 558 static char* find_mount_point(char *block)
 559 {
 560         FILE *fp = fopen("/proc/self/mountinfo", "r");
 561         static char line[256];
 562         int len = strlen(block);
 563         char *point = NULL, *pos, *tmp, *cpoint, *devname;
 564         struct stat s;
 565         int rstat;
 566         unsigned int minor, major;
 567
 568         if (!fp)
 569                 return NULL;
 570
 571         rstat = stat(block, &s);
 572
 573         while (fgets(line, sizeof(line), fp)) {
 574                 pos = strchr(line, ' ');
 575                 if (!pos)
 576                         continue;
 577
 578                 pos = strchr(pos + 1, ' ');
 579                 if (!pos)
 580                         continue;
 581
 582                 tmp = ++pos;
 583                 pos = strchr(pos, ':');
 584                 if (!pos)
 585                         continue;
 586
 587                 *pos = '\0';
 588                 major = atoi(tmp);
 589                 tmp = ++pos;
 590                 pos = strchr(pos, ' ');
 591                 if (!pos)
 592                         continue;
 593
 594                 *pos = '\0';
 595                 minor = atoi(tmp);
 596                 pos = strchr(pos + 1, ' ');
 597                 if (!pos)
 598                         continue;
 599                 tmp = ++pos;
 600
 601                 pos = strchr(pos, ' ');
 602                 if (!pos)
 603                         continue;
 604                 *pos = '\0';
 605                 cpoint = tmp;
 606
 607                 pos = strchr(pos + 1, ' ');
 608                 if (!pos)
 609                         continue;
 610
 611                 pos = strchr(pos + 1, ' ');
 612                 if (!pos)
 613                         continue;
 614
 615                 pos = strchr(pos + 1, ' ');
 616                 if (!pos)
 617                         continue;
 618
 619                 tmp = ++pos;
 620                 pos = strchr(pos, ' ');
 621                 if (!pos)
 622                         continue;
 623
 624                 *pos = '\0';
 625                 devname = tmp;
 626                 if (!strncmp(block, devname, len)) {
 627                         point = strdup(cpoint);
 628                         break;
 629                 }
 630
 631                 if (rstat)
 632                         continue;
 633
 634                 if (!S_ISBLK(s.st_mode))
 635                         continue;
 636
 637                 if (major == major(s.st_rdev) &&
 638                     minor == minor(s.st_rdev)) {
 639                         point = strdup(cpoint);
 640                         break;
 641                 }
 642         }
 643
 644         fclose(fp);
 645
 646         return point;
 647 }
 648
 649 static int print_block_info(struct probe_info *pr)
 650 {
 651         static char *mp;
 652
 653         mp = find_mount_point(pr->dev);
 654         printf("%s:", pr->dev);
 655         if (pr->uuid)
 656                 printf(" UUID=\"%s\"", pr->uuid);
 657
 658         if (pr->label)
 659                 printf(" LABEL=\"%s\"", pr->label);
 660
 661         if (pr->version)
 662                 printf(" VERSION=\"%s\"", pr->version);
 663
 664         if (mp) {
 665                 printf(" MOUNT=\"%s\"", mp);
 666                 free(mp);
 667         }
 668
 669         printf(" TYPE=\"%s\"\n", pr->type);
 670
 671         return 0;
 672 }
 673
 674 static void mkdir_p(char *dir)
 675 {
 676         char *l = strrchr(dir, '/');
 677
 678         if (l) {
 679                 *l = '\0';
 680                 mkdir_p(dir);
 681                 *l = '/';
 682                 mkdir(dir, 0755);
 683         }
 684 }
 685
 686 static void check_filesystem(struct probe_info *pr)
 687 {
 688         pid_t pid;
 689         struct stat statbuf;
 690         const char *e2fsck = "/usr/sbin/e2fsck";
 691         const char *dosfsck = "/usr/sbin/dosfsck";
 692         const char *ckfs;
 693
 694         /* UBIFS does not need stuff like fsck */
 695         if (!strncmp(pr->type, "ubifs", 5))
 696                 return;
 697
 698         if (!strncmp(pr->type, "vfat", 4)) {
 699                 ckfs = dosfsck;
 700         } else if (!strncmp(pr->type, "ext", 3)) {
 701                 ckfs = e2fsck;
 702         } else {
 703                 ULOG_ERR("check_filesystem: %s is not supported\n", pr->type);
 704                 return;
 705         }
 706
 707         if (stat(ckfs, &statbuf) < 0) {
 708                 ULOG_ERR("check_filesystem: %s not found\n", ckfs);
 709                 return;
 710         }
 711
 712         pid = fork();
 713         if (!pid) {
 714                 execl(ckfs, ckfs, "-p", pr->dev, NULL);
 715                 exit(-1);
 716         } else if (pid > 0) {
 717                 int status;
 718
 719                 waitpid(pid, &status, 0);
 720                 if (WEXITSTATUS(status))
 721                         ULOG_ERR("check_filesystem: %s returned %d\n", ckfs, WEXITSTATUS(status));
 722         }
 723 }
 724
 725 static void handle_swapfiles(bool on)
 726 {
 727         struct stat s;
 728         struct mount *m;
 729         struct probe_info *pr;
 730
 731         vlist_for_each_element(&mounts, m, node)
 732         {
 733                 if (m->type != TYPE_SWAP || !m->target)
 734                         continue;
 735
 736                 if (stat(m->target, &s) || !S_ISREG(s.st_mode))
 737                         continue;
 738
 739                 pr = _probe_path(m->target);
 740
 741                 if (!pr)
 742                         continue;
 743
 744                 if (!strcmp(pr->type, "swap")) {
 745                         if (on)
 746                                 swapon(pr->dev, m->prio);
 747                         else
 748                                 swapoff(pr->dev);
 749                 }
 750
 751                 free(pr);
 752         }
 753 }
 754
 755 static int mount_device(struct probe_info *pr, int hotplug)
 756 {
 757         struct mount *m;
 758         char *device;
 759         char *mp;
 760
 761         if (!pr)
 762                 return -1;
 763
 764         device = basename(pr->dev);
 765
 766         if (!strcmp(pr->type, "swap")) {
 767                 if (hotplug && !auto_swap)
 768                         return -1;
 769                 m = find_swap(pr->uuid, pr->label, device);
 770                 if (m || anon_swap)
 771                         swapon(pr->dev, (m) ? (m->prio) : (0));
 772
 773                 return 0;
 774         }
 775
 776         if (hotplug && !auto_mount)
 777                 return -1;
 778
 779         mp = find_mount_point(pr->dev);
 780         if (mp) {
 781                 ULOG_ERR("%s is already mounted on %s\n", pr->dev, mp);
 782                 free(mp);
 783                 return -1;
 784         }
 785
 786         m = find_block(pr->uuid, pr->label, device, NULL);
 787         if (m && m->extroot)
 788                 return -1;
 789
 790         if (m) {
 791                 char *target = m->target;
 792                 char _target[32];
 793                 int err = 0;
 794
 795                 if (!target) {
 796                         snprintf(_target, sizeof(_target), "/mnt/%s", device);
 797                         target = _target;
 798                 }
 799                 mkdir_p(target);
 800
 801                 if (check_fs)
 802                         check_filesystem(pr);
 803
 804                 err = mount(pr->dev, target, pr->type, m->flags,
 805                             (m->options) ? (m->options) : (""));
 806                 if (err)
 807                         ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
 808                                  pr->dev, pr->type, target, errno, strerror(errno));
 809                 else
 810                         handle_swapfiles(true);
 811                 return err;
 812         }
 813
 814         if (anon_mount) {
 815                 char target[32];
 816                 int err = 0;
 817
 818                 snprintf(target, sizeof(target), "/mnt/%s", device);
 819                 mkdir_p(target);
 820
 821                 if (check_fs)
 822                         check_filesystem(pr);
 823
 824                 err = mount(pr->dev, target, pr->type, 0, "");
 825                 if (err)
 826                         ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
 827                                  pr->dev, pr->type, target, errno, strerror(errno));
 828                 else
 829                         handle_swapfiles(true);
 830                 return err;
 831         }
 832
 833         return 0;
 834 }
 835
 836 static int umount_device(struct probe_info *pr)
 837 {
 838         struct mount *m;
 839         char *device = basename(pr->dev);
 840         char *mp;
 841         int err;
 842
 843         if (!pr)
 844                 return -1;
 845
 846         if (!strcmp(pr->type, "swap"))
 847                 return -1;
 848
 849         mp = find_mount_point(pr->dev);
 850         if (!mp)
 851                 return -1;
 852
 853         m = find_block(pr->uuid, pr->label, device, NULL);
 854         if (m && m->extroot)
 855                 return -1;
 856
 857         err = umount2(mp, MNT_DETACH);
 858         if (err)
 859                 ULOG_ERR("unmounting %s (%s)  failed (%d) - %s\n",
 860                          pr->dev, mp, errno, strerror(errno));
 861         else
 862                 ULOG_INFO("unmounted %s (%s)\n",
 863                           pr->dev, mp);
 864
 865         free(mp);
 866         return err;
 867 }
 868
 869 static int main_hotplug(int argc, char **argv)
 870 {
 871         char path[32];
 872         char *action, *device, *mount_point;
 873
 874         action = getenv("ACTION");
 875         device = getenv("DEVNAME");
 876
 877         if (!action || !device)
 878                 return -1;
 879         snprintf(path, sizeof(path), "/dev/%s", device);
 880
 881         if (!strcmp(action, "remove")) {
 882                 int err = 0;
 883                 mount_point = find_mount_point(path);
 884                 if (mount_point)
 885                         err = umount2(mount_point, MNT_DETACH);
 886
 887                 if (err)
 888                         ULOG_ERR("umount of %s failed (%d) - %s\n",
 889                                  mount_point, errno, strerror(errno));
 890
 891                 free(mount_point);
 892                 return 0;
 893         } else if (strcmp(action, "add")) {
 894                 ULOG_ERR("Unkown action %s\n", action);
 895
 896                 return -1;
 897         }
 898
 899         if (config_load(NULL))
 900                 return -1;
 901         cache_load(0);
 902
 903         return mount_device(find_block_info(NULL, NULL, path), 1);
 904 }
 905
 906 static int find_block_mtd(char *name, char *part, int plen)
 907 {
 908         FILE *fp = fopen("/proc/mtd", "r");
 909         static char line[256];
 910         char *index = NULL;
 911
 912         if(!fp)
 913                 return -1;
 914
 915         while (!index && fgets(line, sizeof(line), fp)) {
 916                 if (strstr(line, name)) {
 917                         char *eol = strstr(line, ":");
 918
 919                         if (!eol)
 920                                 continue;
 921
 922                         *eol = '\0';
 923                         index = &line[3];
 924                 }
 925         }
 926
 927         fclose(fp);
 928
 929         if (!index)
 930                 return -1;
 931
 932         snprintf(part, plen, "/dev/mtdblock%s", index);
 933
 934         return 0;
 935 }
 936
 937 #ifdef UBIFS_EXTROOT
 938 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id)
 939 {
 940         int dev = 0;
 941
 942         while (ubi_dev_present(libubi, dev))
 943         {
 944                 struct ubi_dev_info dev_info;
 945                 struct ubi_vol_info vol_info;
 946
 947                 if (ubi_get_dev_info1(libubi, dev++, &dev_info))
 948                         continue;
 949                 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info))
 950                         continue;
 951
 952                 *dev_num = dev_info.dev_num;
 953                 *vol_id = vol_info.vol_id;
 954
 955                 return 0;
 956         }
 957
 958         return -1;
 959 }
 960
 961 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen)
 962 {
 963         int dev_num;
 964         int vol_id;
 965         int err = -1;
 966
 967         err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
 968         if (!err)
 969                 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id);
 970
 971         return err;
 972 }
 973
 974 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen)
 975 {
 976         int dev_num;
 977         int vol_id;
 978         int err = -1;
 979
 980         err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
 981         if (!err)
 982                 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id);
 983
 984         return err;
 985 }
 986
 987 #else
 988
 989 static int find_root_dev(char *buf, int len)
 990 {
 991         DIR *d;
 992         dev_t root;
 993         struct stat s;
 994         struct dirent *e;
 995
 996         if (stat("/", &s))
 997                 return -1;
 998
 999         if (!(d = opendir("/dev")))
1000                 return -1;
1001
1002         root = s.st_dev;
1003
1004         while ((e = readdir(d)) != NULL) {
1005                 snprintf(buf, len, "/dev/%s", e->d_name);
1006
1007                 if (stat(buf, &s) || s.st_rdev != root)
1008                         continue;
1009
1010                 closedir(d);
1011                 return 0;
1012         }
1013
1014         closedir(d);
1015         return -1;
1016 }
1017
1018 #endif
1019
1020 static int test_fs_support(const char *name)
1021 {
1022         char line[128], *p;
1023         int rv = -1;
1024         FILE *f;
1025
1026         if ((f = fopen("/proc/filesystems", "r")) != NULL) {
1027                 while (fgets(line, sizeof(line), f)) {
1028                         p = strtok(line, "\t\n");
1029
1030                         if (p && !strcmp(p, "nodev"))
1031                                 p = strtok(NULL, "\t\n");
1032
1033                         if (p && !strcmp(p, name)) {
1034                                 rv = 0;
1035                                 break;
1036                         }
1037                 }
1038                 fclose(f);
1039         }
1040
1041         return rv;
1042 }
1043
1044 static int check_extroot(char *path)
1045 {
1046         struct probe_info *pr = NULL;
1047         char devpath[32];
1048
1049 #ifdef UBIFS_EXTROOT
1050         if (find_block_mtd("\"rootfs\"", devpath, sizeof(devpath))) {
1051                 int err = -1;
1052                 libubi_t libubi;
1053
1054                 libubi = libubi_open();
1055                 err = find_block_ubi_RO(libubi, "rootfs", devpath, sizeof(devpath));
1056                 libubi_close(libubi);
1057                 if (err)
1058                         return -1;
1059         }
1060 #else
1061         if (find_block_mtd("\"rootfs\"", devpath, sizeof(devpath))) {
1062                 if (find_root_dev(devpath, sizeof(devpath))) {
1063                         ULOG_ERR("extroot: unable to determine root device\n");
1064                         return -1;
1065                 }
1066         }
1067 #endif
1068
1069         list_for_each_entry(pr, &devices, list) {
1070                 if (!strcmp(pr->dev, devpath)) {
1071                         struct stat s;
1072                         FILE *fp = NULL;
1073                         char tag[64];
1074                         char uuid[64] = { 0 };
1075
1076                         snprintf(tag, sizeof(tag), "%s/etc", path);
1077                         if (stat(tag, &s))
1078                                 mkdir_p(tag);
1079
1080                         snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
1081                         if (stat(tag, &s)) {
1082                                 fp = fopen(tag, "w+");
1083                                 if (!fp) {
1084                                         ULOG_ERR("extroot: failed to write UUID to %s: %d (%s)\n",
1085                                                  tag, errno, strerror(errno));
1086                                         /* return 0 to continue boot regardless of error */
1087                                         return 0;
1088                                 }
1089                                 fputs(pr->uuid, fp);
1090                                 fclose(fp);
1091                                 return 0;
1092                         }
1093
1094                         fp = fopen(tag, "r");
1095                         if (!fp) {
1096                                 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1097                                          tag, errno, strerror(errno));
1098                                 return -1;
1099                         }
1100
1101                         if (!fgets(uuid, sizeof(uuid), fp))
1102                                 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1103                                          tag, errno, strerror(errno));
1104                         fclose(fp);
1105
1106                         if (*uuid && !strcasecmp(uuid, pr->uuid))
1107                                 return 0;
1108
1109                         ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n",
1110                                  pr->uuid, basename(path), uuid);
1111                         return -1;
1112                 }
1113         }
1114
1115         ULOG_ERR("extroot: unable to lookup root device %s\n", devpath);
1116         return -1;
1117 }
1118
1119 /*
1120  * Read info about extroot from UCI (using prefix) and mount it.
1121  */
1122 static int mount_extroot(char *cfg)
1123 {
1124         char overlay[] = "/tmp/extroot/overlay";
1125         char mnt[] = "/tmp/extroot/mnt";
1126         char *path = mnt;
1127         struct probe_info *pr;
1128         struct mount *m;
1129         int err = -1;
1130
1131         /* Load @cfg/etc/config/fstab */
1132         if (config_load(cfg))
1133                 return -2;
1134
1135         /* See if there is extroot-specific mount config */
1136         m = find_block(NULL, NULL, NULL, "/");
1137         if (!m)
1138                 m = find_block(NULL, NULL, NULL, "/overlay");
1139
1140         if (!m || !m->extroot)
1141         {
1142                 ULOG_INFO("extroot: not configured\n");
1143                 return -1;
1144         }
1145
1146         /* Find block device pointed by the mount config */
1147         pr = find_block_info(m->uuid, m->label, m->device);
1148
1149         if (!pr && delay_root){
1150                 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root);
1151                 sleep(delay_root);
1152                 make_devs();
1153                 cache_load(0);
1154                 pr = find_block_info(m->uuid, m->label, m->device);
1155         }
1156         if (pr) {
1157                 if (strncmp(pr->type, "ext", 3) &&
1158                     strncmp(pr->type, "ubifs", 5)) {
1159                         ULOG_ERR("extroot: unsupported filesystem %s, try ext4\n", pr->type);
1160                         return -1;
1161                 }
1162
1163                 if (test_fs_support(pr->type)) {
1164                         ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr->type);
1165                         return -1;
1166                 }
1167
1168                 if (m->overlay)
1169                         path = overlay;
1170                 mkdir_p(path);
1171
1172                 if (check_fs)
1173                         check_filesystem(pr);
1174
1175                 err = mount(pr->dev, path, pr->type, m->flags,
1176                             (m->options) ? (m->options) : (""));
1177
1178                 if (err) {
1179                         ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%s)\n",
1180                                  pr->dev, pr->type, path, errno, strerror(errno));
1181                 } else if (m->overlay) {
1182                         err = check_extroot(path);
1183                         if (err)
1184                                 umount(path);
1185                 }
1186         } else {
1187                 ULOG_ERR("extroot: cannot find device %s%s\n",
1188                          (m->uuid ? "with UUID " : (m->label ? "with label " : "")),
1189                          (m->uuid ? m->uuid : (m->label ? m->label : m->device)));
1190         }
1191
1192         return err;
1193 }
1194
1195 static int main_extroot(int argc, char **argv)
1196 {
1197         struct probe_info *pr;
1198         char blkdev_path[32] = { 0 };
1199         int err = -1;
1200 #ifdef UBIFS_EXTROOT
1201         libubi_t libubi;
1202 #endif
1203
1204         if (!getenv("PREINIT"))
1205                 return -1;
1206
1207         if (argc != 2) {
1208                 ULOG_ERR("Usage: block extroot\n");
1209                 return -1;
1210         }
1211
1212         make_devs();
1213         cache_load(1);
1214
1215         /* enable LOG_INFO messages */
1216         ulog_threshold(LOG_INFO);
1217
1218         /*
1219          * Look for "rootfs_data". We will want to mount it and check for
1220          * extroot configuration.
1221          */
1222
1223         /* Start with looking for MTD partition */
1224         find_block_mtd("\"rootfs_data\"", blkdev_path, sizeof(blkdev_path));
1225         if (blkdev_path[0]) {
1226                 pr = find_block_info(NULL, NULL, blkdev_path);
1227                 if (pr && !strcmp(pr->type, "jffs2")) {
1228                         char cfg[] = "/tmp/jffs_cfg";
1229
1230                         /*
1231                          * Mount MTD part and try extroot (using
1232                          * /etc/config/fstab from that partition)
1233                          */
1234                         mkdir_p(cfg);
1235                         if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) {
1236                                 err = mount_extroot(cfg);
1237                                 umount2(cfg, MNT_DETACH);
1238                         }
1239                         if (err < 0)
1240                                 rmdir("/tmp/overlay");
1241                         rmdir(cfg);
1242                         return err;
1243                 }
1244         }
1245
1246 #ifdef UBIFS_EXTROOT
1247         /* ... but it also could be an UBI volume */
1248         memset(blkdev_path, 0, sizeof(blkdev_path));
1249         libubi = libubi_open();
1250         find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path));
1251         libubi_close(libubi);
1252         if (blkdev_path[0]) {
1253                 char cfg[] = "/tmp/ubifs_cfg";
1254
1255                 /* Mount volume and try extroot (using fstab from that vol) */
1256                 mkdir_p(cfg);
1257                 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) {
1258                         err = mount_extroot(cfg);
1259                         umount2(cfg, MNT_DETACH);
1260                 }
1261                 if (err < 0)
1262                         rmdir("/tmp/overlay");
1263                 rmdir(cfg);
1264                 return err;
1265        }
1266 #endif
1267
1268         return mount_extroot(NULL);
1269 }
1270
1271 static int main_mount(int argc, char **argv)
1272 {
1273         struct probe_info *pr;
1274
1275         if (config_load(NULL))
1276                 return -1;
1277
1278         cache_load(1);
1279         list_for_each_entry(pr, &devices, list)
1280                 mount_device(pr, 0);
1281
1282         handle_swapfiles(true);
1283
1284         return 0;
1285 }
1286
1287 static int main_umount(int argc, char **argv)
1288 {
1289         struct probe_info *pr;
1290
1291         if (config_load(NULL))
1292                 return -1;
1293
1294         handle_swapfiles(false);
1295
1296         cache_load(0);
1297         list_for_each_entry(pr, &devices, list)
1298                 umount_device(pr);
1299
1300         return 0;
1301 }
1302
1303 static int main_detect(int argc, char **argv)
1304 {
1305         struct probe_info *pr;
1306
1307         cache_load(0);
1308         printf("config 'global'\n");
1309         printf("\toption\tanon_swap\t'0'\n");
1310         printf("\toption\tanon_mount\t'0'\n");
1311         printf("\toption\tauto_swap\t'1'\n");
1312         printf("\toption\tauto_mount\t'1'\n");
1313         printf("\toption\tdelay_root\t'5'\n");
1314         printf("\toption\tcheck_fs\t'0'\n\n");
1315         list_for_each_entry(pr, &devices, list)
1316                 print_block_uci(pr);
1317
1318         return 0;
1319 }
1320
1321 static int main_info(int argc, char **argv)
1322 {
1323         int i;
1324         struct probe_info *pr;
1325
1326         cache_load(1);
1327         if (argc == 2) {
1328                 list_for_each_entry(pr, &devices, list)
1329                         print_block_info(pr);
1330
1331                 return 0;
1332         };
1333
1334         for (i = 2; i < argc; i++) {
1335                 struct stat s;
1336
1337                 if (stat(argv[i], &s)) {
1338                         ULOG_ERR("failed to stat %s\n", argv[i]);
1339                         continue;
1340                 }
1341                 if (!S_ISBLK(s.st_mode) && !(S_ISCHR(s.st_mode) && major(s.st_rdev) == 250)) {
1342                         ULOG_ERR("%s is not a block device\n", argv[i]);
1343                         continue;
1344                 }
1345                 pr = find_block_info(NULL, NULL, argv[i]);
1346                 if (pr)
1347                         print_block_info(pr);
1348         }
1349
1350         return 0;
1351 }
1352
1353 static int swapon_usage(void)
1354 {
1355         fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1356                 "\tStart swapping on [DEVICE]\n"
1357                 " -a\tStart swapping on all swap devices\n"
1358                 " -p pri\tSet priority of swap device\n"
1359                 " -s\tShow summary\n");
1360         return -1;
1361 }
1362
1363 static int main_swapon(int argc, char **argv)
1364 {
1365         int ch;
1366         FILE *fp;
1367         char *lineptr;
1368         size_t s;
1369         struct probe_info *pr;
1370         int flags = 0;
1371         int pri;
1372         struct stat st;
1373         int err;
1374
1375         while ((ch = getopt(argc, argv, "ap:s")) != -1) {
1376                 switch(ch) {
1377                 case 's':
1378                         fp = fopen("/proc/swaps", "r");
1379                         lineptr = NULL;
1380
1381                         if (!fp) {
1382                                 ULOG_ERR("failed to open /proc/swaps\n");
1383                                 return -1;
1384                         }
1385                         while (getline(&lineptr, &s, fp) > 0)
1386                                 printf("%s", lineptr);
1387                         if (lineptr)
1388                                 free(lineptr);
1389                         fclose(fp);
1390                         return 0;
1391                 case 'a':
1392                         cache_load(0);
1393                         list_for_each_entry(pr, &devices, list) {
1394                                 if (strcmp(pr->type, "swap"))
1395                                         continue;
1396                                 if (swapon(pr->dev, 0))
1397                                         ULOG_ERR("failed to swapon %s\n", pr->dev);
1398                         }
1399                         return 0;
1400                 case 'p':
1401                         pri = atoi(optarg);
1402                         if (pri >= 0)
1403                                 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
1404                         break;
1405                 default:
1406                         return swapon_usage();
1407                 }
1408
1409         }
1410
1411         if (optind != (argc - 1))
1412                 return swapon_usage();
1413
1414         if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) {
1415                 ULOG_ERR("%s is not a block device or file\n", argv[optind]);
1416                 return -1;
1417         }
1418         err = swapon(argv[optind], flags);
1419         if (err) {
1420                 ULOG_ERR("failed to swapon %s (%d)\n", argv[optind], err);
1421                 return err;
1422         }
1423
1424         return 0;
1425 }
1426
1427 static int main_swapoff(int argc, char **argv)
1428 {
1429         if (argc != 2) {
1430                 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n"
1431                         "\tStop swapping on DEVICE\n"
1432                         " -a\tStop swapping on all swap devices\n");
1433                 return -1;
1434         }
1435
1436         if (!strcmp(argv[1], "-a")) {
1437                 FILE *fp = fopen("/proc/swaps", "r");
1438                 char line[256];
1439
1440                 if (!fp) {
1441                         ULOG_ERR("failed to open /proc/swaps\n");
1442                         return -1;
1443                 }
1444                 if (fgets(line, sizeof(line), fp))
1445                         while (fgets(line, sizeof(line), fp)) {
1446                                 char *end = strchr(line, ' ');
1447                                 int err;
1448
1449                                 if (!end)
1450                                         continue;
1451                                 *end = '\0';
1452                                 err = swapoff(line);
1453                                 if (err)
1454                                         ULOG_ERR("failed to swapoff %s (%d)\n", line, err);
1455                         }
1456                 fclose(fp);
1457         } else {
1458                 struct stat s;
1459                 int err;
1460
1461                 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) {
1462                         ULOG_ERR("%s is not a block device or file\n", argv[1]);
1463                         return -1;
1464                 }
1465                 err = swapoff(argv[1]);
1466                 if (err) {
1467                         ULOG_ERR("failed to swapoff %s (%d)\n", argv[1], err);
1468                         return err;
1469                 }
1470         }
1471
1472         return 0;
1473 }
1474
1475 int main(int argc, char **argv)
1476 {
1477         char *base = basename(*argv);
1478
1479         umask(0);
1480
1481         ulog_open(-1, -1, "block");
1482         ulog_threshold(LOG_NOTICE);
1483
1484         if (!strcmp(base, "swapon"))
1485                 return main_swapon(argc, argv);
1486
1487         if (!strcmp(base, "swapoff"))
1488                 return main_swapoff(argc, argv);
1489
1490         if ((argc > 1) && !strcmp(base, "block")) {
1491                 if (!strcmp(argv[1], "info"))
1492                         return main_info(argc, argv);
1493
1494                 if (!strcmp(argv[1], "detect"))
1495                         return main_detect(argc, argv);
1496
1497                 if (!strcmp(argv[1], "hotplug"))
1498                         return main_hotplug(argc, argv);
1499
1500                 if (!strcmp(argv[1], "extroot"))
1501                         return main_extroot(argc, argv);
1502
1503                 if (!strcmp(argv[1], "mount"))
1504                         return main_mount(argc, argv);
1505
1506                 if (!strcmp(argv[1], "umount"))
1507                         return main_umount(argc, argv);
1508
1509                 if (!strcmp(argv[1], "remount")) {
1510                         int ret = main_umount(argc, argv);
1511
1512                         if (!ret)
1513                                 ret = main_mount(argc, argv);
1514                         return ret;
1515                 }
1516         }
1517
1518         ULOG_ERR("Usage: block <info|mount|umount|detect>\n");
1519
1520         return -1;
1521 }