char *syspath;
const char *devpath;
const char *sysname;
- char *devname;
+ char *devnode;
char *subsystem;
- struct list_head link_list;
- struct list_head env_list;
+ struct list_node devlink_list;
+ struct list_node properties_list;
char *action;
+ int event_timeout;
char *driver;
char *devpath_old;
char *physdevpath;
int num_fake_partitions;
int devlink_priority;
int ignore_remove;
- struct list_head attr_list;
+ struct list_node attr_list;
+ int info_loaded;
};
static size_t syspath_to_db_path(struct udev_device *udev_device, char *filename, size_t len)
return util_path_encode(&filename[start], len - start);
}
-static int device_read_uevent_file(struct udev_device *udev_device)
-{
- char filename[UTIL_PATH_SIZE];
- FILE *f;
- char line[UTIL_LINE_SIZE];
-
- util_strlcpy(filename, udev_device->syspath, sizeof(filename));
- util_strlcat(filename, "/uevent", sizeof(filename));
- f = fopen(filename, "r");
- if (f == NULL)
- return -1;
-
- while (fgets(line, sizeof(line), f)) {
- char *pos;
-
- pos = strchr(line, '\n');
- if (pos == NULL)
- continue;
- pos[0] = '\0';
- device_add_property_from_string(udev_device, line);
- }
-
- fclose(f);
- return 0;
-}
-
static int device_read_db(struct udev_device *udev_device)
{
struct stat stats;
char filename[UTIL_PATH_SIZE];
char line[UTIL_LINE_SIZE];
FILE *f;
- int rc = 0;
syspath_to_db_path(udev_device, filename, sizeof(filename));
if (lstat(filename, &stats) != 0) {
- info(udev_device->udev, "no db file to read %s: %s\n", filename, strerror(errno));
+ info(udev_device->udev, "no db file to read %s: %m\n", filename);
return -1;
}
if ((stats.st_mode & S_IFMT) == S_IFLNK) {
char target[UTIL_PATH_SIZE];
int target_len;
- info(udev_device->udev, "found a symlink as db file\n");
target_len = readlink(filename, target, sizeof(target));
if (target_len > 0)
target[target_len] = '\0';
else {
- info(udev_device->udev, "error reading db link %s: %s\n", filename, strerror(errno));
+ info(udev_device->udev, "error reading db link %s: %m\n", filename);
return -1;
}
- dbg(udev_device->udev, "db link points to '%s'\n", target);
- if (asprintf(&udev_device->devname, "%s/%s", udev_get_dev_path(udev_device->udev), target) < 0)
+ if (asprintf(&udev_device->devnode, "%s/%s", udev_get_dev_path(udev_device->udev), target) < 0)
return -ENOMEM;
+ info(udev_device->udev, "device %p filled with db symlink data '%s'\n", udev_device, udev_device->devnode);
return 0;
}
f = fopen(filename, "r");
if (f == NULL) {
- info(udev_device->udev, "error reading db file %s: %s\n", filename, strerror(errno));
+ info(udev_device->udev, "error reading db file %s: %m\n", filename);
return -1;
}
while (fgets(line, sizeof(line), f)) {
ssize_t len;
const char *val;
- unsigned int maj, min;
len = strlen(line);
if (len < 4)
switch(line[0]) {
case 'N':
- asprintf(&udev_device->devname, "%s/%s", udev_get_dev_path(udev_device->udev), val);
- break;
- case 'M':
- sscanf(val, "%u:%u", &maj, &min);
- device_set_devnum(udev_device, makedev(maj, min));
+ asprintf(&udev_device->devnode, "%s/%s", udev_get_dev_path(udev_device->udev), val);
break;
case 'S':
util_strlcpy(filename, udev_get_dev_path(udev_device->udev), sizeof(filename));
device_set_devlink_priority(udev_device, atoi(val));
break;
case 'T':
- device_set_timeout(udev_device, atoi(val));
+ device_set_event_timeout(udev_device, atoi(val));
break;
case 'A':
device_set_num_fake_partitions(udev_device, atoi(val));
}
fclose(f);
- return rc;
+ info(udev_device->udev, "device %p filled with db file data\n", udev_device);
+ return 0;
}
-struct udev_device *device_init(struct udev *udev)
+static int device_read_uevent_file(struct udev_device *udev_device)
+{
+ char filename[UTIL_PATH_SIZE];
+ FILE *f;
+ char line[UTIL_LINE_SIZE];
+ int maj = 0;
+ int min = 0;
+
+ util_strlcpy(filename, udev_device->syspath, sizeof(filename));
+ util_strlcat(filename, "/uevent", sizeof(filename));
+ f = fopen(filename, "r");
+ if (f == NULL)
+ return -1;
+
+ while (fgets(line, sizeof(line), f)) {
+ char *pos;
+
+ pos = strchr(line, '\n');
+ if (pos == NULL)
+ continue;
+ pos[0] = '\0';
+
+ if (strncmp(line, "MAJOR=", 6) == 0)
+ maj = strtoull(&line[6], NULL, 10);
+ else if (strncmp(line, "MINOR=", 6) == 0)
+ min = strtoull(&line[6], NULL, 10);
+
+ device_add_property_from_string(udev_device, line);
+ }
+
+ udev_device->devnum = makedev(maj, min);
+
+ fclose(f);
+ return 0;
+}
+
+static void device_load_info(struct udev_device *device)
+{
+ device_read_uevent_file(device);
+ device_read_db(device);
+ device->info_loaded = 1;
+}
+
+void device_set_info_loaded(struct udev_device *device)
+{
+ device->info_loaded = 1;
+}
+
+struct udev_device *device_new(struct udev *udev)
{
struct udev_device *udev_device;
memset(udev_device, 0x00, sizeof(struct udev_device));
udev_device->refcount = 1;
udev_device->udev = udev;
- INIT_LIST_HEAD(&udev_device->link_list);
- INIT_LIST_HEAD(&udev_device->env_list);
- INIT_LIST_HEAD(&udev_device->attr_list);
+ list_init(&udev_device->devlink_list);
+ list_init(&udev_device->properties_list);
+ list_init(&udev_device->attr_list);
info(udev_device->udev, "udev_device: %p created\n", udev_device);
return udev_device;
}
**/
struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath)
{
+ size_t len;
+ const char *subdir;
char path[UTIL_PATH_SIZE];
+ char *pos;
struct stat statbuf;
struct udev_device *udev_device;
if (syspath == NULL)
return NULL;
- util_strlcpy(path, syspath, sizeof(path));
- util_strlcat(path, "/uevent", sizeof(path));
- if (stat(path, &statbuf) != 0) {
- info(udev, "not a device :%s\n", syspath);
+ /* path starts in sys */
+ len = strlen(udev_get_sys_path(udev));
+ if (strncmp(syspath, udev_get_sys_path(udev), len) != 0) {
+ info(udev, "not in sys :%s\n", syspath);
return NULL;
}
- udev_device = device_init(udev);
- if (udev_device == NULL)
+ /* path is not a root directory */
+ subdir = &syspath[len+1];
+ pos = strrchr(subdir, '/');
+ if (pos == NULL || pos < &subdir[2]) {
+ info(udev, "not a subdir :%s\n", syspath);
return NULL;
+ }
/* resolve possible symlink to real path */
util_strlcpy(path, syspath, sizeof(path));
util_resolve_sys_link(udev, path, sizeof(path));
+
+ /* try to resolve the silly block layout if needed */
+ if (strncmp(&path[len], "/block/", 7) == 0) {
+ char block[UTIL_PATH_SIZE];
+ char part[UTIL_PATH_SIZE];
+
+ util_strlcpy(block, path, sizeof(block));
+ pos = strrchr(block, '/');
+ if (pos == NULL)
+ return NULL;
+ util_strlcpy(part, pos, sizeof(part));
+ pos[0] = '\0';
+ if (util_resolve_sys_link(udev, block, sizeof(block)) == 0) {
+ util_strlcpy(path, block, sizeof(path));
+ util_strlcat(path, part, sizeof(path));
+ }
+ }
+
+ /* path exists in sys */
+ if (strncmp(&syspath[len], "/devices/", 9) == 0 ||
+ strncmp(&syspath[len], "/class/", 7) == 0 ||
+ strncmp(&syspath[len], "/block/", 7) == 0) {
+ char file[UTIL_PATH_SIZE];
+
+ /* all "devices" require a "uevent" file */
+ util_strlcpy(file, path, sizeof(file));
+ util_strlcat(file, "/uevent", sizeof(file));
+ if (stat(file, &statbuf) != 0) {
+ info(udev, "not a device: %s\n", syspath);
+ return NULL;
+ }
+ } else {
+ /* everything else just needs to be a directory */
+ if (stat(path, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode)) {
+ info(udev, "directory not found: %s\n", syspath);
+ return NULL;
+ }
+ }
+
+ udev_device = device_new(udev);
+ if (udev_device == NULL)
+ return NULL;
+
device_set_syspath(udev_device, path);
info(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device));
- device_read_uevent_file(udev_device);
- if (device_read_db(udev_device) >= 0)
- info(udev, "device %p filled with udev database data\n", udev_device);
return udev_device;
}
{
char path[UTIL_PATH_SIZE];
const char *type_str;
+ struct udev_enumerate *udev_enumerate;
+ struct udev_list_entry *list_entry;
+ struct udev_device *device = NULL;
if (type == 'b')
type_str = "block";
else
return NULL;
+ /* /sys/dev/{block,char}/<maj>:<min> link */
snprintf(path, sizeof(path), "%s/dev/%s/%u:%u", udev_get_sys_path(udev),
type_str, major(devnum), minor(devnum));
- if (util_resolve_sys_link(udev, path, sizeof(path)) < 0)
+ if (util_resolve_sys_link(udev, path, sizeof(path)) == 0)
+ return udev_device_new_from_syspath(udev, path);
+
+ udev_enumerate = udev_enumerate_new(udev);
+ if (udev_enumerate == NULL)
return NULL;
- return udev_device_new_from_syspath(udev, path);
+ /* fallback to search sys devices for the major/minor */
+ if (type == 'b')
+ udev_enumerate_add_match_subsystem(udev_enumerate, "block");
+ else if (type == 'c')
+ udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block");
+ udev_enumerate_scan_devices(udev_enumerate);
+ udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) {
+ struct udev_device *device_loop;
+
+ device_loop = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry));
+ if (device_loop != NULL) {
+ if (udev_device_get_devnum(device_loop) == devnum) {
+ if (type == 'b' && strcmp(udev_device_get_subsystem(device_loop), "block") != 0)
+ continue;
+ if (type == 'c' && strcmp(udev_device_get_subsystem(device_loop), "block") == 0)
+ continue;
+ device = device_loop;
+ break;
+ }
+ udev_device_unref(device_loop);
+ }
+ }
+ udev_enumerate_unref(udev_enumerate);
+ return device;
}
static struct udev_device *device_new_from_parent(struct udev_device *udev_device)
{
struct udev_device *udev_device_parent = NULL;
char path[UTIL_PATH_SIZE];
- char *pos;
+ const char *subdir;
- if (udev_device == NULL)
- return NULL;
+ /* follow "device" link in deprecated sys layout */
+ if (strncmp(udev_device->devpath, "/class/", 7) == 0 ||
+ strncmp(udev_device->devpath, "/block/", 7) == 0) {
+ util_strlcpy(path, udev_device->syspath, sizeof(path));
+ util_strlcat(path, "/device", sizeof(path));
+ if (util_resolve_sys_link(udev_device->udev, path, sizeof(path)) == 0)
+ udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
+ return udev_device_parent;
+ }
util_strlcpy(path, udev_device->syspath, sizeof(path));
+ subdir = &path[strlen(udev_get_sys_path(udev_device->udev))+1];
while (1) {
- pos = strrchr(path, '/');
- if (pos == path || pos == NULL)
+ char *pos;
+
+ pos = strrchr(subdir, '/');
+ if (pos == NULL || pos < &subdir[2])
break;
pos[0] = '\0';
udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
if (udev_device_parent != NULL)
return udev_device_parent;
}
-
- /* follow "device" link in deprecated sys /sys/class/ layout */
- if (strncmp(udev_device->devpath, "/class/", 7) == 0) {
- util_strlcpy(path, udev_device->syspath, sizeof(path));
- util_strlcat(path, "/device", sizeof(path));
- if (util_resolve_sys_link(udev_device->udev, path, sizeof(path)) == 0) {
- udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
- if (udev_device_parent != NULL)
- return udev_device_parent;
- }
- }
return NULL;
}
struct udev_device *udev_device_get_parent(struct udev_device *udev_device)
{
+ if (udev_device == NULL)
+ return NULL;
+
if (udev_device->parent_device != NULL) {
info(udev_device->udev, "returning existing parent %p\n", udev_device->parent_device);
return udev_device->parent_device;
return udev_device->parent_device;
}
+struct udev_device *udev_device_get_parent_with_subsystem(struct udev_device *udev_device, const char *subsystem)
+{
+ struct udev_device *parent;
+
+ parent = udev_device_get_parent(udev_device);
+ while (parent != NULL) {
+ const char *parent_subsystem;
+
+ parent_subsystem = udev_device_get_subsystem(parent);
+ if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0)
+ break;
+ parent = udev_device_get_parent(parent);
+ }
+ return parent;
+}
+
/**
* udev_device_get_udev:
* @udev_device: udev device
if (udev_device->parent_device != NULL)
udev_device_unref(udev_device->parent_device);
free(udev_device->syspath);
- free(udev_device->devname);
+ free(udev_device->devnode);
free(udev_device->subsystem);
- util_name_list_cleanup(udev_device->udev, &udev_device->link_list);
- util_name_list_cleanup(udev_device->udev, &udev_device->env_list);
+ list_cleanup(udev_device->udev, &udev_device->devlink_list);
+ list_cleanup(udev_device->udev, &udev_device->properties_list);
free(udev_device->action);
free(udev_device->driver);
free(udev_device->devpath_old);
free(udev_device->physdevpath);
- util_name_list_cleanup(udev_device->udev, &udev_device->attr_list);
+ list_cleanup(udev_device->udev, &udev_device->attr_list);
info(udev_device->udev, "udev_device: %p released\n", udev_device);
free(udev_device);
}
{
if (udev_device == NULL)
return NULL;
- return udev_device->devname;
+ if (!udev_device->info_loaded)
+ device_load_info(udev_device);
+ return udev_device->devnode;
}
/**
}
/**
- * udev_device_get_devlinks:
+ * udev_device_get_devlinks_list_entry:
* @udev_device: udev device
- * @cb: function to be called for every device link found
- * @data: data to be passed to the function
*
- * Retrieve the device links pointing to the device file of the
- * udev device. For every device link, the passed function will be
- * called with the device link string.
- * The path is an absolute path, and starts with the device directory.
- * If the function returns 1, remaning device links will be ignored.
+ * Retrieve the list of device links pointing to the device file of
+ * the udev device. The next list entry can be retrieved with
+ * udev_list_entry_next(), which returns #NULL if no more entries exist.
+ * The devlink path can be retrieved from the list entry by
+ * udev_list_entry_get_name(). The path is an absolute path, and starts with
+ * the device directory.
*
- * Returns: the number of device links passed to the caller, or a negative value on error
+ * Returns: the first entry of the device node link list
**/
-int udev_device_get_devlinks(struct udev_device *udev_device,
- int (*cb)(struct udev_device *udev_device, const char *value, void *data),
- void *data)
+struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device)
{
- struct util_name_entry *name_loop;
- int count = 0;
-
if (udev_device == NULL)
- return -1;
- list_for_each_entry(name_loop, &udev_device->link_list, node) {
- count++;
- if (cb(udev_device, name_loop->name, data) != 0)
- break;
- }
- return count;
+ return NULL;
+ if (!udev_device->info_loaded)
+ device_load_info(udev_device);
+ return list_get_entry(&udev_device->devlink_list);
}
/**
- * udev_device_get_properties:
+ * udev_device_get_properties_list_entry:
* @udev_device: udev device
- * @cb: function to be called for every property found
- * @data: data to be passed to the function
*
- * Retrieve the property key/value pairs belonging to the
- * udev device. For every key/value pair, the passed function will be
- * called. If the function returns 1, remaning properties will be
- * ignored.
+ * Retrieve the list of key/value device properties of the udev
+ * device. The next list entry can be retrieved with udev_list_entry_next(),
+ * which returns #NULL if no more entries exist. The property name
+ * can be retrieved from the list entry by udev_list_get_name(),
+ * the property value by udev_list_get_value().
*
- * Returns: the number of properties passed to the caller, or a negative value on error
+ * Returns: the first entry of the property list
**/
-int udev_device_get_properties(struct udev_device *udev_device,
- int (*cb)(struct udev_device *udev_device, const char *key, const char *value, void *data),
- void *data)
+struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device)
{
- struct util_name_entry *name_loop;
- int count = 0;
-
if (udev_device == NULL)
- return -1;
- list_for_each_entry(name_loop, &udev_device->env_list, node) {
- count++;
- if (cb(udev_device, name_loop->name, name_loop->value, data) != 0)
- break;
- }
- return count;
+ return NULL;
+ if (!udev_device->info_loaded)
+ device_load_info(udev_device);
+ return list_get_entry(&udev_device->properties_list);
}
const char *udev_device_get_driver(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_attr_value(struct udev_device *udev_device, const char *attr)
{
- struct util_name_entry *name_loop;
+ struct udev_list_entry *list_entry;
char path[UTIL_PATH_SIZE];
char value[UTIL_NAME_SIZE];
struct stat statbuf;
const char *val = NULL;
/* look for possibly already cached result */
- list_for_each_entry(name_loop, &udev_device->attr_list, node) {
- if (strcmp(name_loop->name, attr) == 0) {
- info(udev_device->udev, "'%s' in cache '%s'\n", attr, name_loop->value);
- return name_loop->value;
+ udev_list_entry_foreach(list_entry, list_get_entry(&udev_device->attr_list)) {
+ if (strcmp(udev_list_entry_get_name(list_entry), attr) == 0) {
+ info(udev_device->udev, "got '%s' (%s) from cache\n", attr, udev_list_entry_get_value(list_entry));
+ return udev_list_entry_get_value(list_entry);
}
}
util_strlcat(path, attr, sizeof(path));
if (lstat(path, &statbuf) != 0) {
- info(udev_device->udev, "stat '%s' failed: %s\n", path, strerror(errno));
+ info(udev_device->udev, "stat '%s' failed: %m\n", path);
goto out;
}
if (pos != NULL) {
pos = &pos[1];
info(udev_device->udev, "cache '%s' with link value '%s'\n", attr, pos);
- val = util_name_list_add(udev_device->udev, &udev_device->attr_list, attr, pos, 0)->value;
+ list_entry = list_entry_add(udev_device->udev, &udev_device->attr_list, attr, pos, 0, 0);
+ val = udev_list_entry_get_value(list_entry);
}
}
goto out;
value[size] = '\0';
util_remove_trailing_chars(value, '\n');
info(udev_device->udev, "'%s' has attribute value '%s'\n", path, value);
- val = util_name_list_add(udev_device->udev, &udev_device->attr_list, attr, value, 0)->value;
+ list_entry = list_entry_add(udev_device->udev, &udev_device->attr_list, attr, value, 0, 0);
+ val = udev_list_entry_get_value(list_entry);
out:
return val;
}
return 0;
}
-int device_set_devname(struct udev_device *udev_device, const char *devname)
+int device_set_devnode(struct udev_device *udev_device, const char *devnode)
{
- udev_device->devname = strdup(devname);
- if (udev_device->devname == NULL)
+ udev_device->devnode = strdup(devnode);
+ if (udev_device->devnode == NULL)
return -ENOMEM;
return 0;
}
int device_add_devlink(struct udev_device *udev_device, const char *devlink)
{
- if (util_name_list_add(udev_device->udev, &udev_device->link_list, devlink, NULL, 0) == NULL)
+ if (list_entry_add(udev_device->udev, &udev_device->devlink_list, devlink, NULL, 1, 0) == NULL)
return -ENOMEM;
return 0;
}
int device_add_property(struct udev_device *udev_device, const char *key, const char *value)
{
- if (util_name_list_add(udev_device->udev, &udev_device->env_list, key, value, 0) == NULL)
+ if (list_entry_add(udev_device->udev, &udev_device->properties_list, key, value, 1, 0) == NULL)
return -ENOMEM;
return 0;
}
const char *device_get_devpath_old(struct udev_device *udev_device)
{
- if (udev_device == NULL)
- return NULL;
return udev_device->devpath_old;
}
const char *device_get_physdevpath(struct udev_device *udev_device)
{
- if (udev_device == NULL)
- return NULL;
return udev_device->physdevpath;
}
int device_get_timeout(struct udev_device *udev_device)
{
- if (udev_device == NULL)
- return -1;
return udev_device->timeout;
}
udev_device->timeout = timeout;
return 0;
}
+int device_get_event_timeout(struct udev_device *udev_device)
+{
+ if (!udev_device->info_loaded)
+ device_load_info(udev_device);
+ return udev_device->event_timeout;
+}
+
+int device_set_event_timeout(struct udev_device *udev_device, int event_timeout)
+{
+ udev_device->event_timeout = event_timeout;
+ return 0;
+}
int device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum)
{
int device_get_num_fake_partitions(struct udev_device *udev_device)
{
- if (udev_device == NULL)
- return -1;
+ if (!udev_device->info_loaded)
+ device_load_info(udev_device);
return udev_device->num_fake_partitions;
}
int device_get_devlink_priority(struct udev_device *udev_device)
{
- if (udev_device == NULL)
- return -1;
+ if (!udev_device->info_loaded)
+ device_load_info(udev_device);
return udev_device->devlink_priority;
}
int device_get_ignore_remove(struct udev_device *udev_device)
{
- if (udev_device == NULL)
- return -1;
+ if (!udev_device->info_loaded)
+ device_load_info(udev_device);
return udev_device->ignore_remove;
}
~ianmdlvl / elogind.git / blobdiff