+ return NULL;
+ if (!udev_device->info_loaded)
+ device_load_info(udev_device);
+ if (!udev_device->devlinks_uptodate) {
+ char symlinks[UTIL_PATH_SIZE];
+ struct udev_list_entry *list_entry;
+
+ udev_device->devlinks_uptodate = 1;
+ list_entry = udev_device_get_devlinks_list_entry(udev_device);
+ if (list_entry != NULL) {
+ util_strlcpy(symlinks, udev_list_entry_get_name(list_entry), sizeof(symlinks));
+ udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
+ util_strlcat(symlinks, " ", sizeof(symlinks));
+ util_strlcat(symlinks, udev_list_entry_get_name(list_entry), sizeof(symlinks));
+ }
+ udev_device_add_property(udev_device, "DEVLINKS", symlinks);
+ }
+ }
+ return udev_list_get_entry(&udev_device->properties_list);
+}
+
+const char *udev_device_get_driver(struct udev_device *udev_device)
+{
+ char driver[UTIL_NAME_SIZE];
+
+ if (udev_device == NULL)
+ return NULL;
+ if (!udev_device->driver_set) {
+ udev_device->driver_set = 1;
+ if (util_get_sys_driver(udev_device->udev, udev_device->syspath, driver, sizeof(driver)) > 0)
+ udev_device->driver = strdup(driver);
+ }
+ return udev_device->driver;
+}
+
+dev_t udev_device_get_devnum(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return makedev(0, 0);
+ if (!udev_device->info_loaded)
+ device_load_info(udev_device);
+ return udev_device->devnum;
+}
+
+const char *udev_device_get_action(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return NULL;
+ return udev_device->action;
+}
+
+unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return 0;
+ return udev_device->seqnum;
+}
+
+const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr)
+{
+ struct udev_list_entry *list_entry;
+ char path[UTIL_PATH_SIZE];
+ char value[4096];
+ struct stat statbuf;
+ int fd;
+ ssize_t size;
+ const char *val = NULL;
+
+ if (udev_device == NULL)
+ return NULL;
+ if (sysattr == NULL)
+ return NULL;
+
+ /* look for possibly already cached result */
+ udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_device->sysattr_list)) {
+ if (strcmp(udev_list_entry_get_name(list_entry), sysattr) == 0) {
+ dbg(udev_device->udev, "got '%s' (%s) from cache\n",
+ sysattr, udev_list_entry_get_value(list_entry));
+ return udev_list_entry_get_value(list_entry);
+ }
+ }
+
+ util_strlcpy(path, udev_device_get_syspath(udev_device), sizeof(path));
+ util_strlcat(path, "/", sizeof(path));
+ util_strlcat(path, sysattr, sizeof(path));
+
+ if (lstat(path, &statbuf) != 0) {
+ dbg(udev_device->udev, "no attribute '%s', keep negative entry\n", path);
+ udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, NULL, 0, 0);
+ goto out;
+ }
+
+ if (S_ISLNK(statbuf.st_mode)) {
+ char target[UTIL_NAME_SIZE];
+ int len;
+ char *pos;
+
+ /* some core links return the last element of the target path */
+ if (strcmp(sysattr, "driver") != 0 &&
+ strcmp(sysattr, "subsystem") != 0 &&
+ strcmp(sysattr, "module") != 0)
+ goto out;
+
+ len = readlink(path, target, sizeof(target));
+ if (len > 0) {
+ target[len] = '\0';
+ pos = strrchr(target, '/');
+ if (pos != NULL) {
+ pos = &pos[1];
+ dbg(udev_device->udev, "cache '%s' with link value '%s'\n", sysattr, pos);
+ list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, pos, 0, 0);
+ val = udev_list_entry_get_value(list_entry);
+ }
+ }
+ goto out;
+ }
+
+ /* skip directories */
+ if (S_ISDIR(statbuf.st_mode))
+ goto out;
+
+ /* skip non-readable files */
+ if ((statbuf.st_mode & S_IRUSR) == 0)
+ goto out;
+
+ /* read attribute value */
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ dbg(udev_device->udev, "attribute '%s' can not be opened\n", path);
+ goto out;
+ }
+ size = read(fd, value, sizeof(value));
+ close(fd);
+ if (size < 0)
+ goto out;
+ if (size == sizeof(value))
+ goto out;
+
+ /* got a valid value, store it in cache and return it */
+ value[size] = '\0';
+ util_remove_trailing_chars(value, '\n');
+ dbg(udev_device->udev, "'%s' has attribute value '%s'\n", path, value);
+ list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, value, 0, 0);
+ val = udev_list_entry_get_value(list_entry);
+out:
+ return val;
+}
+
+int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath)
+{
+ const char *pos;
+ size_t len;
+
+ free(udev_device->syspath);
+ udev_device->syspath = strdup(syspath);
+ if (udev_device->syspath == NULL)
+ return -ENOMEM;
+ udev_device->devpath = &udev_device->syspath[strlen(udev_get_sys_path(udev_device->udev))];
+ udev_device_add_property(udev_device, "DEVPATH", udev_device->devpath);
+
+ pos = strrchr(udev_device->syspath, '/');
+ if (pos == NULL)
+ return -EINVAL;
+ udev_device->sysname = strdup(&pos[1]);
+ if (udev_device->sysname == NULL)
+ return -ENOMEM;
+
+ /* some devices have '!' in their name, change that to '/' */
+ len = 0;
+ while (udev_device->sysname[len] != '\0') {
+ if (udev_device->sysname[len] == '!')
+ udev_device->sysname[len] = '/';
+ len++;
+ }
+
+ /* trailing number */
+ while (len > 0 && isdigit(udev_device->sysname[--len]))
+ udev_device->sysnum = &udev_device->sysname[len];
+
+ /* sysname is completely numeric */
+ if (len == 0)
+ udev_device->sysnum = NULL;
+
+ return 0;
+}
+
+int udev_device_set_subsystem(struct udev_device *udev_device, const char *subsystem)
+{
+ free(udev_device->subsystem);
+ udev_device->subsystem = strdup(subsystem);
+ if (udev_device->subsystem == NULL)
+ return -ENOMEM;
+ udev_device->subsystem_set = 1;
+ udev_device_add_property(udev_device, "SUBSYSTEM", udev_device->subsystem);
+ return 0;
+}
+
+int udev_device_set_devtype(struct udev_device *udev_device, const char *devtype)
+{
+ free(udev_device->devtype);
+ udev_device->devtype = strdup(devtype);
+ if (udev_device->devtype == NULL)
+ return -ENOMEM;
+ udev_device->devtype_set = 1;
+ udev_device_add_property(udev_device, "DEVTYPE", udev_device->devtype);
+ return 0;
+}
+
+int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode)
+{
+ free(udev_device->devnode);
+ udev_device->devnode = strdup(devnode);
+ if (devnode == NULL)
+ return 0;
+ if (udev_device->devnode == NULL)
+ return -ENOMEM;
+ udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode);
+ return 0;
+}
+
+int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink)
+{
+ udev_device->devlinks_uptodate = 0;
+ if (udev_list_entry_add(udev_device->udev, &udev_device->devlinks_list, devlink, NULL, 1, 0) == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value)
+{
+ udev_device->envp_uptodate = 0;
+ if (value == NULL) {
+ struct udev_list_entry *list_entry;
+
+ list_entry = udev_device_get_properties_list_entry(udev_device);
+ list_entry = udev_list_entry_get_by_name(list_entry, key);
+ if (list_entry != NULL)
+ udev_list_entry_delete(list_entry);
+ return NULL;
+ }
+ return udev_list_entry_add(udev_device->udev, &udev_device->properties_list, key, value, 1, 0);
+}
+
+struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property)
+{
+ char name[UTIL_PATH_SIZE];
+ char *val;
+
+ util_strlcpy(name, property, sizeof(name));
+ val = strchr(name, '=');
+ if (val == NULL)
+ return NULL;
+ val[0] = '\0';
+ val = &val[1];
+ if (val[0] == '\0')
+ val = NULL;
+ return udev_device_add_property(udev_device, name, val);
+}
+
+const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key)
+{
+ struct udev_list_entry *list_entry;
+
+ if (udev_device == NULL)
+ return NULL;
+ if (key == NULL)
+ return NULL;
+
+ list_entry = udev_device_get_properties_list_entry(udev_device);
+ list_entry = udev_list_entry_get_by_name(list_entry, key);
+ return udev_list_entry_get_value(list_entry);
+}
+
+#define ENVP_SIZE 128
+#define MONITOR_BUF_SIZE 4096
+static int update_envp_monitor_buf(struct udev_device *udev_device)
+{
+ const char *action;
+ struct udev_list_entry *list_entry;
+ size_t bufpos;
+ size_t len;
+ unsigned int i;
+
+ /* monitor buffer of property strings */
+ free(udev_device->monitor_buf);
+ udev_device->monitor_buf_len = 0;
+ udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE);
+ if (udev_device->monitor_buf == NULL)
+ return -ENOMEM;
+
+ /* envp array, strings will point into monitor buffer */
+ if (udev_device->envp == NULL)
+ udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE);
+ if (udev_device->envp == NULL)
+ return -ENOMEM;
+
+ /* header <action>@<devpath> */
+ action = udev_device_get_action(udev_device);
+ if (action == NULL)
+ return -EINVAL;
+ bufpos = util_strlcpy(udev_device->monitor_buf, action, MONITOR_BUF_SIZE);
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos], "@", MONITOR_BUF_SIZE-bufpos);
+ if (len >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len;
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos],
+ udev_device_get_devpath(udev_device),
+ MONITOR_BUF_SIZE-bufpos);
+ if (len+1 >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len+1;
+
+ i = 0;
+ udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
+ /* add string to envp array */
+ udev_device->envp[i++] = &udev_device->monitor_buf[bufpos];
+ if (i+1 >= ENVP_SIZE)
+ return -EINVAL;
+
+ /* add property string to monitor buffer */
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos],
+ udev_list_entry_get_name(list_entry), MONITOR_BUF_SIZE-bufpos);
+ if (len >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len;
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos], "=", MONITOR_BUF_SIZE-bufpos);
+ if (len >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len;
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos], udev_list_entry_get_value(list_entry),
+ MONITOR_BUF_SIZE-bufpos);
+ if (len+1 >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len+1;