udev/lib/libudev-device.c

   1 /*
   2  * libudev - interface to udev device information
   3  *
   4  * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <stddef.h>
  15 #include <unistd.h>
  16 #include <errno.h>
  17 #include <string.h>
  18 #include <dirent.h>
  19 #include <fcntl.h>
  20 #include <ctype.h>
  21 #include <sys/stat.h>
  22
  23 #include "libudev.h"
  24 #include "libudev-private.h"
  25
  26 struct udev_device {
  27         struct udev *udev;
  28         struct udev_device *parent_device;
  29         char *syspath;
  30         const char *devpath;
  31         char *sysname;
  32         const char *sysnum;
  33         char *devnode;
  34         char *subsystem;
  35         char *devtype;
  36         char *driver;
  37         char *action;
  38         char *devpath_old;
  39         char *physdevpath;
  40         char **envp;
  41         char *monitor_buf;
  42         size_t monitor_buf_len;
  43         struct udev_list_node devlinks_list;
  44         struct udev_list_node properties_list;
  45         struct udev_list_node sysattr_list;
  46         unsigned long long int seqnum;
  47         int event_timeout;
  48         int timeout;
  49         int num_fake_partitions;
  50         int devlink_priority;
  51         int refcount;
  52         dev_t devnum;
  53         int watch_handle;
  54         unsigned int parent_set:1;
  55         unsigned int subsystem_set:1;
  56         unsigned int devtype_set:1;
  57         unsigned int devlinks_uptodate:1;
  58         unsigned int envp_uptodate:1;
  59         unsigned int driver_set:1;
  60         unsigned int info_loaded:1;
  61         unsigned int ignore_remove:1;
  62 };
  63
  64 static size_t devpath_to_db_path(struct udev *udev, const char *devpath, char *filename, size_t len)
  65 {
  66         size_t start;
  67
  68         /* translate to location of db file */
  69         util_strlcpy(filename, udev_get_dev_path(udev), len);
  70         start = util_strlcat(filename, "/.udev/db/", len);
  71         util_strlcat(filename, devpath, len);
  72         return util_path_encode(&filename[start], len - start);
  73 }
  74
  75 int udev_device_read_db(struct udev_device *udev_device)
  76 {
  77         struct stat stats;
  78         char filename[UTIL_PATH_SIZE];
  79         char line[UTIL_LINE_SIZE];
  80         FILE *f;
  81
  82         devpath_to_db_path(udev_device->udev, udev_device->devpath, filename, sizeof(filename));
  83
  84         if (lstat(filename, &stats) != 0) {
  85                 dbg(udev_device->udev, "no db file to read %s: %m\n", filename);
  86                 return -1;
  87         }
  88         if ((stats.st_mode & S_IFMT) == S_IFLNK) {
  89                 char target[UTIL_PATH_SIZE];
  90                 char devnode[UTIL_PATH_SIZE];
  91                 int target_len;
  92                 char *next;
  93
  94                 target_len = readlink(filename, target, sizeof(target));
  95                 if (target_len > 0)
  96                         target[target_len] = '\0';
  97                 else {
  98                         dbg(udev_device->udev, "error reading db link %s: %m\n", filename);
  99                         return -1;
 100                 }
 101
 102                 next = strchr(target, ' ');
 103                 if (next != NULL) {
 104                         next[0] = '\0';
 105                         next = &next[1];
 106                 }
 107                 util_strlcpy(devnode, udev_get_dev_path(udev_device->udev), sizeof(devnode));
 108                 util_strlcat(devnode, "/", sizeof(devnode));
 109                 util_strlcat(devnode, target, sizeof(devnode));
 110                 udev_device_set_devnode(udev_device, devnode);
 111                 while (next != NULL) {
 112                         char devlink[UTIL_PATH_SIZE];
 113                         const char *lnk;
 114
 115                         lnk = next;
 116                         next = strchr(next, ' ');
 117                         if (next != NULL) {
 118                                 next[0] = '\0';
 119                                 next = &next[1];
 120                         }
 121                         util_strlcpy(devlink, udev_get_dev_path(udev_device->udev), sizeof(devlink));
 122                         util_strlcat(devlink, "/", sizeof(devlink));
 123                         util_strlcat(devlink, lnk, sizeof(devlink));
 124                         udev_device_add_devlink(udev_device, devlink);
 125                 }
 126                 info(udev_device->udev, "device %p filled with db symlink data '%s'\n", udev_device, udev_device->devnode);
 127                 return 0;
 128         }
 129
 130         f = fopen(filename, "r");
 131         if (f == NULL) {
 132                 dbg(udev_device->udev, "error reading db file %s: %m\n", filename);
 133                 return -1;
 134         }
 135         while (fgets(line, sizeof(line), f)) {
 136                 ssize_t len;
 137                 const char *val;
 138
 139                 len = strlen(line);
 140                 if (len < 4)
 141                         break;
 142                 line[len-1] = '\0';
 143                 val = &line[2];
 144                 switch(line[0]) {
 145                 case 'N':
 146                         util_strlcpy(filename, udev_get_dev_path(udev_device->udev), sizeof(filename));
 147                         util_strlcat(filename, "/", sizeof(filename));
 148                         util_strlcat(filename, val, sizeof(filename));
 149                         udev_device_set_devnode(udev_device, filename);
 150                         break;
 151                 case 'S':
 152                         util_strlcpy(filename, udev_get_dev_path(udev_device->udev), sizeof(filename));
 153                         util_strlcat(filename, "/", sizeof(filename));
 154                         util_strlcat(filename, val, sizeof(filename));
 155                         udev_device_add_devlink(udev_device, filename);
 156                         break;
 157                 case 'L':
 158                         udev_device_set_devlink_priority(udev_device, atoi(val));
 159                         break;
 160                 case 'T':
 161                         udev_device_set_event_timeout(udev_device, atoi(val));
 162                         break;
 163                 case 'A':
 164                         udev_device_set_num_fake_partitions(udev_device, atoi(val));
 165                         break;
 166                 case 'R':
 167                         udev_device_set_ignore_remove(udev_device, atoi(val));
 168                         break;
 169                 case 'E':
 170                         udev_device_add_property_from_string(udev_device, val);
 171                         break;
 172                 case 'W':
 173                         udev_device_set_watch_handle(udev_device, atoi(val));
 174                         break;
 175                 }
 176         }
 177         fclose(f);
 178
 179         info(udev_device->udev, "device %p filled with db file data\n", udev_device);
 180         return 0;
 181 }
 182
 183 int udev_device_read_uevent_file(struct udev_device *udev_device)
 184 {
 185         char filename[UTIL_PATH_SIZE];
 186         FILE *f;
 187         char line[UTIL_LINE_SIZE];
 188         int maj = 0;
 189         int min = 0;
 190
 191         util_strlcpy(filename, udev_device->syspath, sizeof(filename));
 192         util_strlcat(filename, "/uevent", sizeof(filename));
 193         f = fopen(filename, "r");
 194         if (f == NULL)
 195                 return -1;
 196
 197         while (fgets(line, sizeof(line), f)) {
 198                 char *pos;
 199
 200                 pos = strchr(line, '\n');
 201                 if (pos == NULL)
 202                         continue;
 203                 pos[0] = '\0';
 204
 205                 if (strncmp(line, "DEVTYPE=", 8) == 0)
 206                         udev_device_set_devtype(udev_device, &line[8]);
 207                 else if (strncmp(line, "MAJOR=", 6) == 0)
 208                         maj = strtoull(&line[6], NULL, 10);
 209                 else if (strncmp(line, "MINOR=", 6) == 0)
 210                         min = strtoull(&line[6], NULL, 10);
 211
 212                 udev_device_add_property_from_string(udev_device, line);
 213         }
 214
 215         udev_device->devnum = makedev(maj, min);
 216
 217         fclose(f);
 218         return 0;
 219 }
 220
 221 static void device_load_info(struct udev_device *device)
 222 {
 223         device->info_loaded = 1;
 224         udev_device_read_uevent_file(device);
 225         udev_device_read_db(device);
 226 }
 227
 228 void udev_device_set_info_loaded(struct udev_device *device)
 229 {
 230         device->info_loaded = 1;
 231 }
 232
 233 struct udev_device *device_new(struct udev *udev)
 234 {
 235         struct udev_device *udev_device;
 236         struct udev_list_entry *list_entry;
 237
 238         if (udev == NULL)
 239                 return NULL;
 240
 241         udev_device = calloc(1, sizeof(struct udev_device));
 242         if (udev_device == NULL)
 243                 return NULL;
 244         udev_device->refcount = 1;
 245         udev_device->udev = udev;
 246         udev_list_init(&udev_device->devlinks_list);
 247         udev_list_init(&udev_device->properties_list);
 248         udev_list_init(&udev_device->sysattr_list);
 249         udev_device->event_timeout = -1;
 250         udev_device->watch_handle = -1;
 251         /* copy global properties */
 252         udev_list_entry_foreach(list_entry, udev_get_properties_list_entry(udev))
 253                 udev_device_add_property(udev_device,
 254                                          udev_list_entry_get_name(list_entry),
 255                                          udev_list_entry_get_value(list_entry));
 256         dbg(udev_device->udev, "udev_device: %p created\n", udev_device);
 257         return udev_device;
 258 }
 259
 260 /**
 261  * udev_device_new_from_syspath:
 262  * @udev: udev library context
 263  * @syspath: sys device path including sys directory
 264  *
 265  * Create new udev device, and fill in information from the sys
 266  * device and the udev database entry. The sypath is the absolute
 267  * path to the device, including the sys mount point.
 268  *
 269  * The initial refcount is 1, and needs to be decremented to
 270  * release the resources of the udev device.
 271  *
 272  * Returns: a new udev device, or #NULL, if it does not exist
 273  **/
 274 struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath)
 275 {
 276         size_t len;
 277         const char *subdir;
 278         char path[UTIL_PATH_SIZE];
 279         char *pos;
 280         struct stat statbuf;
 281         struct udev_device *udev_device;
 282
 283         if (udev == NULL)
 284                 return NULL;
 285         if (syspath == NULL)
 286                 return NULL;
 287
 288         /* path starts in sys */
 289         len = strlen(udev_get_sys_path(udev));
 290         if (strncmp(syspath, udev_get_sys_path(udev), len) != 0) {
 291                 info(udev, "not in sys :%s\n", syspath);
 292                 return NULL;
 293         }
 294
 295         /* path is not a root directory */
 296         subdir = &syspath[len+1];
 297         pos = strrchr(subdir, '/');
 298         if (pos == NULL || pos[1] == '\0' || pos < &subdir[2]) {
 299                 dbg(udev, "not a subdir :%s\n", syspath);
 300                 return NULL;
 301         }
 302
 303         /* resolve possible symlink to real path */
 304         util_strlcpy(path, syspath, sizeof(path));
 305         util_resolve_sys_link(udev, path, sizeof(path));
 306
 307         /* try to resolve the silly block layout if needed */
 308         if (strncmp(&path[len], "/block/", 7) == 0) {
 309                 char block[UTIL_PATH_SIZE];
 310                 char part[UTIL_PATH_SIZE];
 311
 312                 util_strlcpy(block, path, sizeof(block));
 313                 pos = strrchr(block, '/');
 314                 if (pos == NULL)
 315                         return NULL;
 316                 util_strlcpy(part, pos, sizeof(part));
 317                 pos[0] = '\0';
 318                 if (util_resolve_sys_link(udev, block, sizeof(block)) == 0) {
 319                         util_strlcpy(path, block, sizeof(path));
 320                         util_strlcat(path, part, sizeof(path));
 321                 }
 322         }
 323
 324         /* path exists in sys */
 325         if (strncmp(&syspath[len], "/devices/", 9) == 0 ||
 326             strncmp(&syspath[len], "/class/", 7) == 0 ||
 327             strncmp(&syspath[len], "/block/", 7) == 0) {
 328                 char file[UTIL_PATH_SIZE];
 329
 330                 /* all "devices" require a "uevent" file */
 331                 util_strlcpy(file, path, sizeof(file));
 332                 util_strlcat(file, "/uevent", sizeof(file));
 333                 if (stat(file, &statbuf) != 0) {
 334                         dbg(udev, "not a device: %s\n", syspath);
 335                         return NULL;
 336                 }
 337         } else {
 338                 /* everything else just needs to be a directory */
 339                 if (stat(path, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode)) {
 340                         dbg(udev, "directory not found: %s\n", syspath);
 341                         return NULL;
 342                 }
 343         }
 344
 345         udev_device = device_new(udev);
 346         if (udev_device == NULL)
 347                 return NULL;
 348
 349         udev_device_set_syspath(udev_device, path);
 350         info(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device));
 351
 352         return udev_device;
 353 }
 354
 355 struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum)
 356 {
 357         char path[UTIL_PATH_SIZE];
 358         const char *type_str;
 359         struct udev_enumerate *udev_enumerate;
 360         struct udev_list_entry *list_entry;
 361         struct udev_device *device = NULL;
 362
 363         if (type == 'b')
 364                 type_str = "block";
 365         else if (type == 'c')
 366                 type_str = "char";
 367         else
 368                 return NULL;
 369
 370         /* /sys/dev/{block,char}/<maj>:<min> link */
 371         snprintf(path, sizeof(path), "%s/dev/%s/%u:%u", udev_get_sys_path(udev),
 372                  type_str, major(devnum), minor(devnum));
 373         if (util_resolve_sys_link(udev, path, sizeof(path)) == 0)
 374                 return udev_device_new_from_syspath(udev, path);
 375
 376         udev_enumerate = udev_enumerate_new(udev);
 377         if (udev_enumerate == NULL)
 378                 return NULL;
 379
 380         /* fallback to search sys devices for the major/minor */
 381         if (type == 'b')
 382                 udev_enumerate_add_match_subsystem(udev_enumerate, "block");
 383         else if (type == 'c')
 384                 udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block");
 385         udev_enumerate_scan_devices(udev_enumerate);
 386         udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) {
 387                 struct udev_device *device_loop;
 388
 389                 device_loop = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry));
 390                 if (device_loop != NULL) {
 391                         if (udev_device_get_devnum(device_loop) == devnum) {
 392                                 if (type == 'b' && strcmp(udev_device_get_subsystem(device_loop), "block") != 0)
 393                                         continue;
 394                                 if (type == 'c' && strcmp(udev_device_get_subsystem(device_loop), "block") == 0)
 395                                         continue;
 396                                 device = device_loop;
 397                                 break;
 398                         }
 399                         udev_device_unref(device_loop);
 400                 }
 401         }
 402         udev_enumerate_unref(udev_enumerate);
 403         return device;
 404 }
 405
 406 struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname)
 407 {
 408         size_t sys_path_len;
 409         char path_full[UTIL_PATH_SIZE];
 410         char *path;
 411         struct stat statbuf;
 412
 413         sys_path_len = util_strlcpy(path_full, udev_get_sys_path(udev), sizeof(path_full));
 414         path = &path_full[sys_path_len];
 415
 416         if (strcmp(subsystem, "subsystem") == 0) {
 417                 util_strlcpy(path, "/subsystem/", sizeof(path_full) - sys_path_len);
 418                 util_strlcat(path, sysname, sizeof(path_full) - sys_path_len);
 419                 if (stat(path_full, &statbuf) == 0)
 420                         goto found;
 421
 422                 util_strlcpy(path, "/bus/", sizeof(path_full) - sys_path_len);
 423                 util_strlcat(path, sysname, sizeof(path_full) - sys_path_len);
 424                 if (stat(path_full, &statbuf) == 0)
 425                         goto found;
 426
 427                 util_strlcpy(path, "/class/", sizeof(path_full) - sys_path_len);
 428                 util_strlcat(path, sysname, sizeof(path_full) - sys_path_len);
 429                 if (stat(path_full, &statbuf) == 0)
 430                         goto found;
 431                 goto out;
 432         }
 433
 434         if (strcmp(subsystem, "module") == 0) {
 435                 util_strlcpy(path, "/module/", sizeof(path_full) - sys_path_len);
 436                 util_strlcat(path, sysname, sizeof(path_full) - sys_path_len);
 437                 if (stat(path_full, &statbuf) == 0)
 438                         goto found;
 439                 goto out;
 440         }
 441
 442         if (strcmp(subsystem, "drivers") == 0) {
 443                 char subsys[UTIL_NAME_SIZE];
 444                 char *driver;
 445
 446                 util_strlcpy(subsys, sysname, sizeof(subsys));
 447                 driver = strchr(subsys, ':');
 448                 if (driver != NULL) {
 449                         driver[0] = '\0';
 450                         driver = &driver[1];
 451                         util_strlcpy(path, "/subsystem/", sizeof(path_full) - sys_path_len);
 452                         util_strlcat(path, subsys, sizeof(path_full) - sys_path_len);
 453                         util_strlcat(path, "/drivers/", sizeof(path_full) - sys_path_len);
 454                         util_strlcat(path, driver, sizeof(path_full) - sys_path_len);
 455                         if (stat(path_full, &statbuf) == 0)
 456                                 goto found;
 457
 458                         util_strlcpy(path, "/bus/", sizeof(path_full) - sys_path_len);
 459                         util_strlcat(path, subsys, sizeof(path_full) - sys_path_len);
 460                         util_strlcat(path, "/drivers/", sizeof(path_full) - sys_path_len);
 461                         util_strlcat(path, driver, sizeof(path_full) - sys_path_len);
 462                         if (stat(path_full, &statbuf) == 0)
 463                                 goto found;
 464                 }
 465                 goto out;
 466         }
 467
 468         util_strlcpy(path, "/subsystem/", sizeof(path_full) - sys_path_len);
 469         util_strlcat(path, subsystem, sizeof(path_full) - sys_path_len);
 470         util_strlcat(path, "/devices/", sizeof(path_full) - sys_path_len);
 471         util_strlcat(path, sysname, sizeof(path_full) - sys_path_len);
 472         if (stat(path_full, &statbuf) == 0)
 473                 goto found;
 474
 475         util_strlcpy(path, "/bus/", sizeof(path_full) - sys_path_len);
 476         util_strlcat(path, subsystem, sizeof(path_full) - sys_path_len);
 477         util_strlcat(path, "/devices/", sizeof(path_full) - sys_path_len);
 478         util_strlcat(path, sysname, sizeof(path_full) - sys_path_len);
 479         if (stat(path_full, &statbuf) == 0)
 480                 goto found;
 481
 482         util_strlcpy(path, "/class/", sizeof(path_full) - sys_path_len);
 483         util_strlcat(path, subsystem, sizeof(path_full) - sys_path_len);
 484         util_strlcat(path, "/", sizeof(path_full) - sys_path_len);
 485         util_strlcat(path, sysname, sizeof(path_full) - sys_path_len);
 486         if (stat(path_full, &statbuf) == 0)
 487                 goto found;
 488 out:
 489         return NULL;
 490 found:
 491         return udev_device_new_from_syspath(udev, path_full);
 492 }
 493
 494 static struct udev_device *device_new_from_parent(struct udev_device *udev_device)
 495 {
 496         struct udev_device *udev_device_parent = NULL;
 497         char path[UTIL_PATH_SIZE];
 498         const char *subdir;
 499
 500         /* follow "device" link in deprecated sys layout */
 501         if (strncmp(udev_device->devpath, "/class/", 7) == 0 ||
 502             strncmp(udev_device->devpath, "/block/", 7) == 0) {
 503                 util_strlcpy(path, udev_device->syspath, sizeof(path));
 504                 util_strlcat(path, "/device", sizeof(path));
 505                 if (util_resolve_sys_link(udev_device->udev, path, sizeof(path)) == 0) {
 506                         udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
 507                         if (udev_device_parent != NULL)
 508                                 return udev_device_parent;
 509                 }
 510         }
 511
 512         util_strlcpy(path, udev_device->syspath, sizeof(path));
 513         subdir = &path[strlen(udev_get_sys_path(udev_device->udev))+1];
 514         while (1) {
 515                 char *pos;
 516
 517                 pos = strrchr(subdir, '/');
 518                 if (pos == NULL || pos < &subdir[2])
 519                         break;
 520                 pos[0] = '\0';
 521                 udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
 522                 if (udev_device_parent != NULL)
 523                         return udev_device_parent;
 524         }
 525         return NULL;
 526 }
 527
 528 struct udev_device *udev_device_get_parent(struct udev_device *udev_device)
 529 {
 530         if (udev_device == NULL)
 531                 return NULL;
 532         if (!udev_device->parent_set) {
 533                 udev_device->parent_set = 1;
 534                 udev_device->parent_device = device_new_from_parent(udev_device);
 535         }
 536         if (udev_device->parent_device != NULL)
 537                 dbg(udev_device->udev, "returning existing parent %p\n", udev_device->parent_device);
 538         return udev_device->parent_device;
 539 }
 540
 541 struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype)
 542 {
 543         struct udev_device *parent;
 544
 545         if (subsystem == NULL)
 546                 return NULL;
 547
 548         parent = udev_device_get_parent(udev_device);
 549         while (parent != NULL) {
 550                 const char *parent_subsystem;
 551                 const char *parent_devtype;
 552
 553                 parent_subsystem = udev_device_get_subsystem(parent);
 554                 if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0) {
 555                         if (devtype == NULL)
 556                                 break;
 557                         parent_devtype = udev_device_get_devtype(parent);
 558                         if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0)
 559                                 break;
 560                 }
 561                 parent = udev_device_get_parent(parent);
 562         }
 563         return parent;
 564 }
 565
 566 /**
 567  * udev_device_get_udev:
 568  * @udev_device: udev device
 569  *
 570  * Retrieve the udev library context the device was created with.
 571  *
 572  * Returns: the udev library context
 573  **/
 574 struct udev *udev_device_get_udev(struct udev_device *udev_device)
 575 {
 576         if (udev_device == NULL)
 577                 return NULL;
 578         return udev_device->udev;
 579 }
 580
 581 /**
 582  * udev_device_ref:
 583  * @udev_device: udev device
 584  *
 585  * Take a reference of a udev device.
 586  *
 587  * Returns: the passed udev device
 588  **/
 589 struct udev_device *udev_device_ref(struct udev_device *udev_device)
 590 {
 591         if (udev_device == NULL)
 592                 return NULL;
 593         udev_device->refcount++;
 594         return udev_device;
 595 }
 596
 597 /**
 598  * udev_device_unref:
 599  * @udev_device: udev device
 600  *
 601  * Drop a reference of a udev device. If the refcount reaches zero,
 602  * the resources of the device will be released.
 603  *
 604  **/
 605 void udev_device_unref(struct udev_device *udev_device)
 606 {
 607         if (udev_device == NULL)
 608                 return;
 609         udev_device->refcount--;
 610         if (udev_device->refcount > 0)
 611                 return;
 612         if (udev_device->parent_device != NULL)
 613                 udev_device_unref(udev_device->parent_device);
 614         free(udev_device->syspath);
 615         free(udev_device->sysname);
 616         free(udev_device->devnode);
 617         free(udev_device->subsystem);
 618         free(udev_device->devtype);
 619         udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list);
 620         udev_list_cleanup_entries(udev_device->udev, &udev_device->properties_list);
 621         free(udev_device->action);
 622         free(udev_device->driver);
 623         free(udev_device->devpath_old);
 624         free(udev_device->physdevpath);
 625         udev_list_cleanup_entries(udev_device->udev, &udev_device->sysattr_list);
 626         free(udev_device->envp);
 627         free(udev_device->monitor_buf);
 628         dbg(udev_device->udev, "udev_device: %p released\n", udev_device);
 629         free(udev_device);
 630 }
 631
 632 /**
 633  * udev_device_get_devpath:
 634  * @udev_device: udev device
 635  *
 636  * Retrieve the kernel devpath value of the udev device. The path
 637  * does not contain the sys mount point, and starts with a '/'.
 638  *
 639  * Returns: the devpath of the udev device
 640  **/
 641 const char *udev_device_get_devpath(struct udev_device *udev_device)
 642 {
 643         if (udev_device == NULL)
 644                 return NULL;
 645         return udev_device->devpath;
 646 }
 647
 648 /**
 649  * udev_device_get_syspath:
 650  * @udev_device: udev device
 651  *
 652  * Retrieve the sys path of the udev device. The path is an
 653  * absolute path and starts with the sys mount point.
 654  *
 655  * Returns: the sys path of the udev device
 656  **/
 657 const char *udev_device_get_syspath(struct udev_device *udev_device)
 658 {
 659         if (udev_device == NULL)
 660                 return NULL;
 661         return udev_device->syspath;
 662 }
 663
 664 const char *udev_device_get_sysname(struct udev_device *udev_device)
 665 {
 666         if (udev_device == NULL)
 667                 return NULL;
 668         return udev_device->sysname;
 669 }
 670
 671 const char *udev_device_get_sysnum(struct udev_device *udev_device)
 672 {
 673         if (udev_device == NULL)
 674                 return NULL;
 675         return udev_device->sysnum;
 676 }
 677
 678 /**
 679  * udev_device_get_devnode:
 680  * @udev_device: udev device
 681  *
 682  * Retrieve the device node file name belonging to the udev device.
 683  * The path is an absolute path, and starts with the device directory.
 684  *
 685  * Returns: the device node file name of the udev device, or #NULL if no device node exists
 686  **/
 687 const char *udev_device_get_devnode(struct udev_device *udev_device)
 688 {
 689         if (udev_device == NULL)
 690                 return NULL;
 691         if (!udev_device->info_loaded)
 692                 device_load_info(udev_device);
 693         return udev_device->devnode;
 694 }
 695
 696 /**
 697  * udev_device_get_subsystem:
 698  * @udev_device: udev device
 699  *
 700  * Retrieve the subsystem string of the udev device. The string does not
 701  * contain any "/".
 702  *
 703  * Returns: the subsystem name of the udev device, or #NULL if it can not be determined
 704  **/
 705 const char *udev_device_get_subsystem(struct udev_device *udev_device)
 706 {
 707         char subsystem[UTIL_NAME_SIZE];
 708
 709         if (udev_device == NULL)
 710                 return NULL;
 711         if (!udev_device->subsystem_set) {
 712                 udev_device->subsystem_set = 1;
 713                 /* read "subsytem" link */
 714                 if (util_get_sys_subsystem(udev_device->udev, udev_device->syspath, subsystem, sizeof(subsystem)) > 0) {
 715                         udev_device_set_subsystem(udev_device, subsystem);
 716                         return udev_device->subsystem;
 717                 }
 718                 /* implicit names */
 719                 if (strncmp(udev_device->devpath, "/module/", 8) == 0) {
 720                         udev_device_set_subsystem(udev_device, "module");
 721                         return udev_device->subsystem;
 722                 }
 723                 if (strstr(udev_device->devpath, "/drivers/") != NULL) {
 724                         udev_device_set_subsystem(udev_device, "drivers");
 725                         return udev_device->subsystem;
 726                 }
 727                 if (strncmp(udev_device->devpath, "/subsystem/", 11) == 0 ||
 728                     strncmp(udev_device->devpath, "/class/", 7) == 0 ||
 729                     strncmp(udev_device->devpath, "/bus/", 5) == 0) {
 730                         udev_device_set_subsystem(udev_device, "subsystem");
 731                         return udev_device->subsystem;
 732                 }
 733         }
 734         return udev_device->subsystem;
 735 }
 736
 737 /**
 738  * udev_device_get_devtype:
 739  * @udev_device: udev device
 740  *
 741  * Retrieve the devtype string of the udev device.
 742  *
 743  * Returns: the devtype name of the udev device, or #NULL if it can not be determined
 744  **/
 745 const char *udev_device_get_devtype(struct udev_device *udev_device)
 746 {
 747         if (udev_device == NULL)
 748                 return NULL;
 749         if (!udev_device->devtype_set) {
 750                 udev_device->devtype_set = 1;
 751                 if (!udev_device->info_loaded)
 752                         udev_device_read_uevent_file(udev_device);
 753         }
 754         return udev_device->devtype;
 755 }
 756
 757 /**
 758  * udev_device_get_devlinks_list_entry:
 759  * @udev_device: udev device
 760  *
 761  * Retrieve the list of device links pointing to the device file of
 762  * the udev device. The next list entry can be retrieved with
 763  * udev_list_entry_next(), which returns #NULL if no more entries exist.
 764  * The devlink path can be retrieved from the list entry by
 765  * udev_list_entry_get_name(). The path is an absolute path, and starts with
 766  * the device directory.
 767  *
 768  * Returns: the first entry of the device node link list
 769  **/
 770 struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device)
 771 {
 772         if (udev_device == NULL)
 773                 return NULL;
 774         if (!udev_device->info_loaded)
 775                 device_load_info(udev_device);
 776         return udev_list_get_entry(&udev_device->devlinks_list);
 777 }
 778
 779 void udev_device_cleanup_devlinks_list(struct udev_device *udev_device)
 780 {
 781         udev_device->devlinks_uptodate = 0;
 782         udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list);
 783 }
 784
 785 /**
 786  * udev_device_get_properties_list_entry:
 787  * @udev_device: udev device
 788  *
 789  * Retrieve the list of key/value device properties of the udev
 790  * device. The next list entry can be retrieved with udev_list_entry_next(),
 791  * which returns #NULL if no more entries exist. The property name
 792  * can be retrieved from the list entry by udev_list_get_name(),
 793  * the property value by udev_list_get_value().
 794  *
 795  * Returns: the first entry of the property list
 796  **/
 797 struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device)
 798 {
 799         if (udev_device == NULL)
 800                 return NULL;
 801         if (!udev_device->info_loaded)
 802                 device_load_info(udev_device);
 803         if (!udev_device->devlinks_uptodate) {
 804                 char symlinks[UTIL_PATH_SIZE];
 805                 struct udev_list_entry *list_entry;
 806
 807                 udev_device->devlinks_uptodate = 1;
 808                 list_entry = udev_device_get_devlinks_list_entry(udev_device);
 809                 if (list_entry != NULL) {
 810                         util_strlcpy(symlinks, udev_list_entry_get_name(list_entry), sizeof(symlinks));
 811                         udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
 812                                 util_strlcat(symlinks, " ", sizeof(symlinks));
 813                                 util_strlcat(symlinks, udev_list_entry_get_name(list_entry), sizeof(symlinks));
 814                         }
 815                         udev_device_add_property(udev_device, "DEVLINKS", symlinks);
 816                 }
 817         }
 818         return udev_list_get_entry(&udev_device->properties_list);
 819 }
 820
 821 const char *udev_device_get_driver(struct udev_device *udev_device)
 822 {
 823         char driver[UTIL_NAME_SIZE];
 824
 825         if (udev_device == NULL)
 826                 return NULL;
 827         if (!udev_device->driver_set) {
 828                 udev_device->driver_set = 1;
 829                 if (util_get_sys_driver(udev_device->udev, udev_device->syspath, driver, sizeof(driver)) > 0)
 830                         udev_device->driver = strdup(driver);
 831         }
 832         return udev_device->driver;
 833 }
 834
 835 dev_t udev_device_get_devnum(struct udev_device *udev_device)
 836 {
 837         if (udev_device == NULL)
 838                 return makedev(0, 0);
 839         if (!udev_device->info_loaded)
 840                 device_load_info(udev_device);
 841         return udev_device->devnum;
 842 }
 843
 844 const char *udev_device_get_action(struct udev_device *udev_device)
 845 {
 846         if (udev_device == NULL)
 847                 return NULL;
 848         return udev_device->action;
 849 }
 850
 851 unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device)
 852 {
 853         if (udev_device == NULL)
 854                 return 0;
 855         return udev_device->seqnum;
 856 }
 857
 858 const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr)
 859 {
 860         struct udev_list_entry *list_entry;
 861         char path[UTIL_PATH_SIZE];
 862         char value[4096];
 863         struct stat statbuf;
 864         int fd;
 865         ssize_t size;
 866         const char *val = NULL;
 867
 868         if (udev_device == NULL)
 869                 return NULL;
 870         if (sysattr == NULL)
 871                 return NULL;
 872
 873         /* look for possibly already cached result */
 874         udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_device->sysattr_list)) {
 875                 if (strcmp(udev_list_entry_get_name(list_entry), sysattr) == 0) {
 876                         dbg(udev_device->udev, "got '%s' (%s) from cache\n",
 877                             sysattr, udev_list_entry_get_value(list_entry));
 878                         return udev_list_entry_get_value(list_entry);
 879                 }
 880         }
 881
 882         util_strlcpy(path, udev_device_get_syspath(udev_device), sizeof(path));
 883         util_strlcat(path, "/", sizeof(path));
 884         util_strlcat(path, sysattr, sizeof(path));
 885
 886         if (lstat(path, &statbuf) != 0) {
 887                 dbg(udev_device->udev, "no attribute '%s', keep negative entry\n", path);
 888                 udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, NULL, 0, 0);
 889                 goto out;
 890         }
 891
 892         if (S_ISLNK(statbuf.st_mode)) {
 893                 char target[UTIL_NAME_SIZE];
 894                 int len;
 895                 char *pos;
 896
 897                 /* some core links return the last element of the target path */
 898                 if (strcmp(sysattr, "driver") != 0 &&
 899                     strcmp(sysattr, "subsystem") != 0 &&
 900                     strcmp(sysattr, "module") != 0)
 901                         goto out;
 902
 903                 len = readlink(path, target, sizeof(target));
 904                 if (len > 0) {
 905                         target[len] = '\0';
 906                         pos = strrchr(target, '/');
 907                         if (pos != NULL) {
 908                                 pos = &pos[1];
 909                                 dbg(udev_device->udev, "cache '%s' with link value '%s'\n", sysattr, pos);
 910                                 list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, pos, 0, 0);
 911                                 val = udev_list_entry_get_value(list_entry);
 912                         }
 913                 }
 914                 goto out;
 915         }
 916
 917         /* skip directories */
 918         if (S_ISDIR(statbuf.st_mode))
 919                 goto out;
 920
 921         /* skip non-readable files */
 922         if ((statbuf.st_mode & S_IRUSR) == 0)
 923                 goto out;
 924
 925         /* read attribute value */
 926         fd = open(path, O_RDONLY);
 927         if (fd < 0) {
 928                 dbg(udev_device->udev, "attribute '%s' can not be opened\n", path);
 929                 goto out;
 930         }
 931         size = read(fd, value, sizeof(value));
 932         close(fd);
 933         if (size < 0)
 934                 goto out;
 935         if (size == sizeof(value))
 936                 goto out;
 937
 938         /* got a valid value, store it in cache and return it */
 939         value[size] = '\0';
 940         util_remove_trailing_chars(value, '\n');
 941         dbg(udev_device->udev, "'%s' has attribute value '%s'\n", path, value);
 942         list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, value, 0, 0);
 943         val = udev_list_entry_get_value(list_entry);
 944 out:
 945         return val;
 946 }
 947
 948 int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath)
 949 {
 950         const char *pos;
 951         size_t len;
 952
 953         free(udev_device->syspath);
 954         udev_device->syspath = strdup(syspath);
 955         if (udev_device->syspath ==  NULL)
 956                 return -ENOMEM;
 957         udev_device->devpath = &udev_device->syspath[strlen(udev_get_sys_path(udev_device->udev))];
 958         udev_device_add_property(udev_device, "DEVPATH", udev_device->devpath);
 959
 960         pos = strrchr(udev_device->syspath, '/');
 961         if (pos == NULL)
 962                 return -EINVAL;
 963         udev_device->sysname = strdup(&pos[1]);
 964         if (udev_device->sysname == NULL)
 965                 return -ENOMEM;
 966
 967         /* some devices have '!' in their name, change that to '/' */
 968         len = 0;
 969         while (udev_device->sysname[len] != '\0') {
 970                 if (udev_device->sysname[len] == '!')
 971                         udev_device->sysname[len] = '/';
 972                 len++;
 973         }
 974
 975         /* trailing number */
 976         while (len > 0 && isdigit(udev_device->sysname[--len]))
 977                 udev_device->sysnum = &udev_device->sysname[len];
 978
 979         /* sysname is completely numeric */
 980         if (len == 0)
 981                 udev_device->sysnum = NULL;
 982
 983         return 0;
 984 }
 985
 986 int udev_device_set_subsystem(struct udev_device *udev_device, const char *subsystem)
 987 {
 988         free(udev_device->subsystem);
 989         udev_device->subsystem = strdup(subsystem);
 990         if (udev_device->subsystem == NULL)
 991                 return -ENOMEM;
 992         udev_device->subsystem_set = 1;
 993         udev_device_add_property(udev_device, "SUBSYSTEM", udev_device->subsystem);
 994         return 0;
 995 }
 996
 997 int udev_device_set_devtype(struct udev_device *udev_device, const char *devtype)
 998 {
 999         free(udev_device->devtype);
1000         udev_device->devtype = strdup(devtype);
1001         if (udev_device->devtype == NULL)
1002                 return -ENOMEM;
1003         udev_device->devtype_set = 1;
1004         udev_device_add_property(udev_device, "DEVTYPE", udev_device->devtype);
1005         return 0;
1006 }
1007
1008 int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode)
1009 {
1010         free(udev_device->devnode);
1011         udev_device->devnode = strdup(devnode);
1012         if (devnode == NULL)
1013                 return 0;
1014         if (udev_device->devnode == NULL)
1015                 return -ENOMEM;
1016         udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode);
1017         return 0;
1018 }
1019
1020 int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink)
1021 {
1022         udev_device->devlinks_uptodate = 0;
1023         if (udev_list_entry_add(udev_device->udev, &udev_device->devlinks_list, devlink, NULL, 1, 0) == NULL)
1024                 return -ENOMEM;
1025         return 0;
1026 }
1027
1028 struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value)
1029 {
1030         udev_device->envp_uptodate = 0;
1031         if (value == NULL) {
1032                 struct udev_list_entry *list_entry;
1033
1034                 list_entry = udev_device_get_properties_list_entry(udev_device);
1035                 list_entry = udev_list_entry_get_by_name(list_entry, key);
1036                 if (list_entry != NULL)
1037                         udev_list_entry_delete(list_entry);
1038                 return NULL;
1039         }
1040         return udev_list_entry_add(udev_device->udev, &udev_device->properties_list, key, value, 1, 0);
1041 }
1042
1043 struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property)
1044 {
1045         char name[UTIL_PATH_SIZE];
1046         char *val;
1047
1048         util_strlcpy(name, property, sizeof(name));
1049         val = strchr(name, '=');
1050         if (val == NULL)
1051                 return NULL;
1052         val[0] = '\0';
1053         val = &val[1];
1054         if (val[0] == '\0')
1055                 val = NULL;
1056         return udev_device_add_property(udev_device, name, val);
1057 }
1058
1059 const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key)
1060 {
1061         struct udev_list_entry *list_entry;
1062
1063         if (udev_device == NULL)
1064                 return NULL;
1065         if (key == NULL)
1066                 return NULL;
1067
1068         list_entry = udev_device_get_properties_list_entry(udev_device);
1069         list_entry =  udev_list_entry_get_by_name(list_entry, key);
1070         return udev_list_entry_get_value(list_entry);
1071 }
1072
1073 #define ENVP_SIZE                       128
1074 #define MONITOR_BUF_SIZE                4096
1075 static int update_envp_monitor_buf(struct udev_device *udev_device)
1076 {
1077         struct udev_list_entry *list_entry;
1078         size_t bufpos;
1079         size_t len;
1080         unsigned int i;
1081
1082         /* monitor buffer of property strings */
1083         free(udev_device->monitor_buf);
1084         udev_device->monitor_buf_len = 0;
1085         udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE);
1086         if (udev_device->monitor_buf == NULL)
1087                 return -ENOMEM;
1088
1089         /* envp array, strings will point into monitor buffer */
1090         if (udev_device->envp == NULL)
1091                 udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE);
1092         if (udev_device->envp == NULL)
1093                 return -ENOMEM;
1094
1095         i = 0;
1096         bufpos = 0;
1097         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
1098                 /* add string to envp array */
1099                 udev_device->envp[i++] = &udev_device->monitor_buf[bufpos];
1100                 if (i+1 >= ENVP_SIZE)
1101                         return -EINVAL;
1102
1103                 /* add property string to monitor buffer */
1104                 len = util_strlcpy(&udev_device->monitor_buf[bufpos],
1105                                    udev_list_entry_get_name(list_entry), MONITOR_BUF_SIZE-bufpos);
1106                 if (len >= MONITOR_BUF_SIZE-bufpos)
1107                         return -EINVAL;
1108                 bufpos += len;
1109                 len = util_strlcpy(&udev_device->monitor_buf[bufpos], "=", MONITOR_BUF_SIZE-bufpos);
1110                 if (len >= MONITOR_BUF_SIZE-bufpos)
1111                         return -EINVAL;
1112                 bufpos += len;
1113                 len = util_strlcpy(&udev_device->monitor_buf[bufpos], udev_list_entry_get_value(list_entry),
1114                                    MONITOR_BUF_SIZE-bufpos);
1115                 if (len+1 >= MONITOR_BUF_SIZE-bufpos)
1116                         return -EINVAL;
1117                 bufpos += len+1;
1118         }
1119         udev_device->envp[i] = NULL;
1120         udev_device->monitor_buf_len = bufpos;
1121         udev_device->envp_uptodate = 1;
1122         dbg(udev_device->udev, "filled envp/monitor buffer, %u properties, %zu bytes\n", i, bufpos);
1123         return 0;
1124 }
1125
1126 char **udev_device_get_properties_envp(struct udev_device *udev_device)
1127 {
1128         if (!udev_device->envp_uptodate)
1129                 if (update_envp_monitor_buf(udev_device) != 0)
1130                         return NULL;
1131         return udev_device->envp;
1132 }
1133
1134 ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf)
1135 {
1136         if (!udev_device->envp_uptodate)
1137                 if (update_envp_monitor_buf(udev_device) != 0)
1138                         return -EINVAL;
1139         *buf = udev_device->monitor_buf;
1140         return udev_device->monitor_buf_len;
1141 }
1142
1143 int udev_device_set_action(struct udev_device *udev_device, const char *action)
1144 {
1145         free(udev_device->action);
1146         udev_device->action = strdup(action);
1147         if (udev_device->action == NULL)
1148                 return -ENOMEM;
1149         udev_device_add_property(udev_device, "ACTION", udev_device->action);
1150         return 0;
1151 }
1152
1153 int udev_device_set_driver(struct udev_device *udev_device, const char *driver)
1154 {
1155         free(udev_device->driver);
1156         udev_device->driver = strdup(driver);
1157         if (udev_device->driver == NULL)
1158                 return -ENOMEM;
1159         udev_device->driver_set = 1;
1160         udev_device_add_property(udev_device, "DRIVER", udev_device->driver);
1161         return 0;
1162 }
1163
1164 const char *udev_device_get_devpath_old(struct udev_device *udev_device)
1165 {
1166         return udev_device->devpath_old;
1167 }
1168
1169 int udev_device_set_devpath_old(struct udev_device *udev_device, const char *devpath_old)
1170 {
1171         udev_device->devpath_old = strdup(devpath_old);
1172         if (udev_device->devpath_old == NULL)
1173                 return -ENOMEM;
1174         udev_device_add_property(udev_device, "DEVPATH_OLD", udev_device->devpath_old);
1175         return 0;
1176 }
1177
1178 const char *udev_device_get_physdevpath(struct udev_device *udev_device)
1179 {
1180         return udev_device->physdevpath;
1181 }
1182
1183 int udev_device_set_physdevpath(struct udev_device *udev_device, const char *physdevpath)
1184 {
1185         udev_device->physdevpath = strdup(physdevpath);
1186         if (udev_device->physdevpath == NULL)
1187                 return -ENOMEM;
1188         return 0;
1189 }
1190
1191 int udev_device_get_timeout(struct udev_device *udev_device)
1192 {
1193         return udev_device->timeout;
1194 }
1195
1196 int udev_device_set_timeout(struct udev_device *udev_device, int timeout)
1197 {
1198         udev_device->timeout = timeout;
1199         return 0;
1200 }
1201 int udev_device_get_event_timeout(struct udev_device *udev_device)
1202 {
1203         if (!udev_device->info_loaded)
1204                 device_load_info(udev_device);
1205         return udev_device->event_timeout;
1206 }
1207
1208 int udev_device_set_event_timeout(struct udev_device *udev_device, int event_timeout)
1209 {
1210         udev_device->event_timeout = event_timeout;
1211         return 0;
1212 }
1213
1214 int udev_device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum)
1215 {
1216         char num[32];
1217
1218         udev_device->seqnum = seqnum;
1219         snprintf(num, sizeof(num), "%llu", seqnum);
1220         udev_device_add_property(udev_device, "SEQNUM", num);
1221         return 0;
1222 }
1223
1224 int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum)
1225 {
1226         char num[32];
1227
1228         udev_device->devnum = devnum;
1229
1230         snprintf(num, sizeof(num), "%u", major(devnum));
1231         udev_device_add_property(udev_device, "MAJOR", num);
1232         snprintf(num, sizeof(num), "%u", minor(devnum));
1233         udev_device_add_property(udev_device, "MINOR", num);
1234         return 0;
1235 }
1236
1237 int udev_device_get_num_fake_partitions(struct udev_device *udev_device)
1238 {
1239         if (!udev_device->info_loaded)
1240                 device_load_info(udev_device);
1241         return udev_device->num_fake_partitions;
1242 }
1243
1244 int udev_device_set_num_fake_partitions(struct udev_device *udev_device, int num)
1245 {
1246         udev_device->num_fake_partitions = num;
1247         return 0;
1248 }
1249
1250 int udev_device_get_devlink_priority(struct udev_device *udev_device)
1251 {
1252         if (!udev_device->info_loaded)
1253                 device_load_info(udev_device);
1254         return udev_device->devlink_priority;
1255 }
1256
1257 int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio)
1258 {
1259          udev_device->devlink_priority = prio;
1260         return 0;
1261 }
1262
1263 int udev_device_get_ignore_remove(struct udev_device *udev_device)
1264 {
1265         if (!udev_device->info_loaded)
1266                 device_load_info(udev_device);
1267         return udev_device->ignore_remove;
1268 }
1269
1270 int udev_device_set_ignore_remove(struct udev_device *udev_device, int ignore)
1271 {
1272         udev_device->ignore_remove = ignore;
1273         return 0;
1274 }
1275
1276 int udev_device_get_watch_handle(struct udev_device *udev_device)
1277 {
1278         if (!udev_device->info_loaded)
1279                 device_load_info(udev_device);
1280         return udev_device->watch_handle;
1281 }
1282
1283 int udev_device_set_watch_handle(struct udev_device *udev_device, int handle)
1284 {
1285         udev_device->watch_handle = handle;
1286         return 0;
1287 }