* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include "config.h"
-
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include "libudev.h"
#include "libudev-private.h"
-#include "../udev.h"
+
+struct udev_enumerate {
+ struct udev *udev;
+ int refcount;
+ struct list_node devices_list;
+};
+
+struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_enumerate)
+{
+ if (udev_enumerate == NULL)
+ return NULL;
+ udev_enumerate->refcount++;
+ return udev_enumerate;
+}
+
+void udev_enumerate_unref(struct udev_enumerate *udev_enumerate)
+{
+ if (udev_enumerate == NULL)
+ return;
+ udev_enumerate->refcount--;
+ if (udev_enumerate->refcount > 0)
+ return;
+ list_cleanup(udev_enumerate->udev, &udev_enumerate->devices_list);
+ free(udev_enumerate);
+}
+
+struct udev *udev_enumerate_get_udev(struct udev_enumerate *udev_enumerate)
+{
+ if (udev_enumerate == NULL)
+ return NULL;
+ return udev_enumerate->udev;
+}
+
+struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enumerate *udev_enumerate)
+{
+ if (udev_enumerate == NULL)
+ return NULL;
+ return list_get_entry(&udev_enumerate->devices_list);
+}
static int devices_scan_subsystem(struct udev *udev,
const char *basedir, const char *subsystem, const char *subdir,
- struct list_head *device_list)
+ struct list_node *devices_list)
{
- char path[PATH_SIZE];
+ char path[UTIL_PATH_SIZE];
DIR *dir;
struct dirent *dent;
- size_t len;
- len = strlcpy(path, udev_get_sys_path(udev), sizeof(path));
- strlcat(path, basedir, sizeof(path));
- strlcat(path, "/", sizeof(path));
- strlcat(path, subsystem, sizeof(path));
+ util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
+ util_strlcat(path, basedir, sizeof(path));
+ if (subsystem != NULL) {
+ util_strlcat(path, "/", sizeof(path));
+ util_strlcat(path, subsystem, sizeof(path));
+ }
if (subdir != NULL)
- strlcat(path, subdir, sizeof(path));
+ util_strlcat(path, subdir, sizeof(path));
dir = opendir(path);
if (dir == NULL)
return -1;
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- char devpath[PATH_SIZE];
+ char syspath[UTIL_PATH_SIZE];
+ char filename[UTIL_PATH_SIZE];
+ struct stat statbuf;
if (dent->d_name[0] == '.')
continue;
- strlcpy(devpath, &path[len], sizeof(devpath));
- strlcat(devpath, "/", sizeof(devpath));
- strlcat(devpath, dent->d_name, sizeof(devpath));
- sysfs_resolve_link(udev, devpath, sizeof(devpath));
- name_list_add(udev, device_list, devpath, 1);
+ util_strlcpy(syspath, path, sizeof(syspath));
+ util_strlcat(syspath, "/", sizeof(syspath));
+ util_strlcat(syspath, dent->d_name, sizeof(syspath));
+ util_strlcpy(filename, syspath, sizeof(filename));
+ util_strlcat(filename, "/uevent", sizeof(filename));
+ if (stat(filename, &statbuf) != 0)
+ continue;
+ util_resolve_sys_link(udev, syspath, sizeof(syspath));
+ list_entry_add(udev, devices_list, syspath, NULL, 1, 1);
}
closedir(dir);
return 0;
}
static int devices_scan_subsystems(struct udev *udev,
- const char *basedir, const char *subsystem, const char *subdir,
- struct list_head *device_list)
+ const char *basedir, const char *subdir,
+ struct udev_list_entry *subsystem_include_list,
+ struct udev_list_entry *subsystem_exclude_list,
+ struct list_node *devices_list)
{
- char path[PATH_SIZE];
- DIR *dir;
- struct dirent *dent;
+ if (subsystem_include_list != NULL) {
+ struct udev_list_entry *list_entry;
- if (subsystem != NULL)
- return devices_scan_subsystem(udev, basedir, subsystem, subdir, device_list);
+ /* if list of subsystems to scan is given, just use this list */
+ udev_list_entry_foreach(list_entry, subsystem_include_list) {
+ if (udev_list_entry_get_by_name(subsystem_exclude_list, udev_list_entry_get_name(list_entry)) != NULL)
+ continue;
+ devices_scan_subsystem(udev, basedir, udev_list_entry_get_name(list_entry), subdir, devices_list);
+ }
+ } else {
+ char path[UTIL_PATH_SIZE];
+ DIR *dir;
+ struct dirent *dent;
- strlcpy(path, udev_get_sys_path(udev), sizeof(path));
- strlcat(path, basedir, sizeof(path));
- dir = opendir(path);
- if (dir == NULL)
- return -1;
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- if (dent->d_name[0] == '.')
- continue;
- devices_scan_subsystem(udev, basedir, dent->d_name, subdir, device_list);
+ /* if no list of subsystems to scan is given, scan all, and possible exclude some subsystems */
+ util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
+ util_strlcat(path, basedir, sizeof(path));
+ dir = opendir(path);
+ if (dir == NULL)
+ return -1;
+ for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+ if (dent->d_name[0] == '.')
+ continue;
+ if (udev_list_entry_get_by_name(subsystem_exclude_list, dent->d_name) != NULL)
+ continue;
+ devices_scan_subsystem(udev, basedir, dent->d_name, subdir, devices_list);
+ }
+ closedir(dir);
}
- closedir(dir);
return 0;
}
-static int devices_delay(struct udev *udev, const char *devpath)
+static int devices_delay(struct udev *udev, const char *syspath)
{
static const char *delay_device_list[] = {
"/block/md",
"/block/dm-",
NULL
};
+ size_t len;
int i;
+ len = strlen(udev_get_sys_path(udev));
+
for (i = 0; delay_device_list[i] != NULL; i++) {
- if (strstr(devpath, delay_device_list[i]) != NULL) {
- info(udev, "delaying: %s\n", devpath);
+ if (strstr(&syspath[len], delay_device_list[i]) != NULL) {
+ info(udev, "delaying: %s\n", syspath);
return 1;
}
}
return 0;
}
-static int devices_call(struct udev *udev, const char *devpath,
- int (*cb)(struct udev *udev,
- const char *devpath, const char *subsystem, const char *name,
- void *data),
- void *data,
- int *cb_rc)
+/**
+ * udev_enumerate_new:
+ * @udev: udev library context
+ *
+ * Returns: an enumeration context
+ **/
+struct udev_enumerate *udev_enumerate_new(struct udev *udev)
{
- char subsystem[NAME_SIZE];
- const char *name;
-
- name = strrchr(devpath, '/');
- if (name == NULL)
- return -1;
- name++;
+ struct udev_enumerate *udev_enumerate;
- if (util_get_sys_subsystem(udev, devpath, subsystem, sizeof(subsystem)) < 2)
- return -1;
- *cb_rc = cb(udev, devpath, subsystem, name, data);
- return 0;
+ udev_enumerate = malloc(sizeof(struct udev_enumerate));
+ if (udev_enumerate == NULL)
+ return NULL;
+ memset(udev_enumerate, 0x00, (sizeof(struct udev_enumerate)));
+ udev_enumerate->refcount = 1;
+ udev_enumerate->udev = udev;
+ list_init(&udev_enumerate->devices_list);
+ return udev_enumerate;
}
/**
- * udev_enumerate_devices:
- * @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.
+ * udev_enumerate_scan_devices:
+ * @udev_enumerate: udev enumeration context
+ * @subsystem: the list of names of subsystems to look for devices
*
- * Returns: the number of properties passed to the caller, or a negative value on error
+ * Returns: 0 on success.
**/
-int udev_enumerate_devices(struct udev *udev, const char *subsystem,
- int (*cb)(struct udev *udev,
- const char *devpath, const char *subsystem, const char *name, void *data),
- void *data)
+int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate, const char *subsystem, ...)
{
- char base[PATH_SIZE];
+ struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
+ va_list vargs;
+ const char *arg;
+ char base[UTIL_PATH_SIZE];
struct stat statbuf;
- struct list_head device_list;
- struct name_entry *loop_device;
- struct name_entry *tmp_device;
- int cb_rc = 0;
- int count = 0;
+ struct list_node subsystem_include_list;
+ struct list_node subsystem_exclude_list;
+ struct udev_list_entry *list_entry;
- INIT_LIST_HEAD(&device_list);
+ if (udev_enumerate == NULL)
+ return -EINVAL;
- /* if we have /sys/subsystem/, forget all the old stuff */
- strlcpy(base, udev_get_sys_path(udev), sizeof(base));
- strlcat(base, "/subsystem", sizeof(base));
+ va_start(vargs, subsystem);
+ list_init(&subsystem_include_list);
+ list_init(&subsystem_exclude_list);
+ for (arg = subsystem; arg != NULL; arg = va_arg(vargs, const char *)) {
+ if (arg[0] != '!')
+ list_entry_add(udev, &subsystem_include_list, arg, NULL, 1, 0);
+ else
+ list_entry_add(udev, &subsystem_exclude_list, &arg[1], NULL, 1, 0);
+ }
+ va_end(vargs);
+
+ util_strlcpy(base, udev_get_sys_path(udev), sizeof(base));
+ util_strlcat(base, "/subsystem", sizeof(base));
if (stat(base, &statbuf) == 0) {
- devices_scan_subsystems(udev, "/subsystem", subsystem, "/devices", &device_list);
+ /* we have /subsystem/, forget all the old stuff */
+ info(udev, "searching '/subsystem/*/devices/*' dir\n");
+ devices_scan_subsystems(udev, "/subsystem", "/devices",
+ list_get_entry(&subsystem_include_list),
+ list_get_entry(&subsystem_exclude_list),
+ &udev_enumerate->devices_list);
} else {
- devices_scan_subsystems(udev, "/bus", subsystem, "/devices", &device_list);
- devices_scan_subsystems(udev, "/class", subsystem, NULL, &device_list);
- }
+ info(udev, "searching '/bus/*/devices/*' dir\n");
+ devices_scan_subsystems(udev, "/bus", "/devices",
+ list_get_entry(&subsystem_include_list),
+ list_get_entry(&subsystem_exclude_list),
+ &udev_enumerate->devices_list);
+ info(udev, "searching '/class/*' dir\n");
+ devices_scan_subsystems(udev, "/class", NULL,
+ list_get_entry(&subsystem_include_list),
+ list_get_entry(&subsystem_exclude_list),
+ &udev_enumerate->devices_list);
+ /* if block isn't a class, scan /block/ */
+ util_strlcpy(base, udev_get_sys_path(udev), sizeof(base));
+ util_strlcat(base, "/class/block", sizeof(base));
+ if (stat(base, &statbuf) != 0) {
+ struct udev_list_entry *include_list = list_get_entry(&subsystem_include_list);
+ struct udev_list_entry *exclude_list = list_get_entry(&subsystem_exclude_list);
+ int include_block = (include_list == NULL || udev_list_entry_get_by_name(include_list, "block") != NULL);
+ int exclude_block = (udev_list_entry_get_by_name(exclude_list, "block") != NULL);
- list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) {
- if (devices_delay(udev, loop_device->name))
- continue;
- if (cb_rc == 0)
- if (devices_call(udev, loop_device->name, cb, data, &cb_rc) == 0)
- count++;
- list_del(&loop_device->node);
- free(loop_device);
+ if (include_block && !exclude_block) {
+ info(udev, "searching '/block/*' dir\n");
+ /* scan disks */
+ devices_scan_subsystem(udev, "/block", NULL, NULL, &udev_enumerate->devices_list);
+ /* scan partitions */
+ info(udev, "searching '/block/*/*' dir\n");
+ devices_scan_subsystems(udev, "/block", NULL,
+ NULL, NULL,
+ &udev_enumerate->devices_list);
+ }
+ }
}
- /* handle remaining delayed devices */
- list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) {
- if (cb_rc == 0)
- if (devices_call(udev, loop_device->name, cb, data, &cb_rc) == 0)
- count++;
- list_del(&loop_device->node);
- free(loop_device);
+ list_cleanup(udev, &subsystem_include_list);
+ list_cleanup(udev, &subsystem_exclude_list);
+
+ /* sort delayed devices to the end of the list */
+ udev_list_entry_foreach(list_entry, list_get_entry(&udev_enumerate->devices_list)) {
+ if (devices_delay(udev, udev_list_entry_get_name(list_entry)))
+ list_entry_move_to_end(list_entry);
}
+ return 0;
+}
- return count;
+/**
+ * udev_enumerate_scan_subsystems:
+ * @udev_enumerate: udev enumeration context
+ *
+ * Returns: 0 on success.
+ **/
+int udev_enumerate_scan_subsystems(struct udev_enumerate *udev_enumerate)
+{
+ struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
+ char base[UTIL_PATH_SIZE];
+ struct stat statbuf;
+ const char *subsysdir;
+
+ if (udev_enumerate == NULL)
+ return -EINVAL;
+
+ util_strlcpy(base, udev_get_sys_path(udev), sizeof(base));
+ util_strlcat(base, "/subsystem", sizeof(base));
+ if (stat(base, &statbuf) == 0)
+ subsysdir = "/subsystem";
+ else
+ subsysdir = "/bus";
+ info(udev, "searching '%s/*' dir\n", subsysdir);
+ devices_scan_subsystem(udev, subsysdir, NULL, NULL, &udev_enumerate->devices_list);
+ info(udev, "searching '%s/*/drivers/*' dir\n", subsysdir);
+ devices_scan_subsystems(udev, subsysdir, "/drivers",
+ NULL, NULL,
+ &udev_enumerate->devices_list);
+ return 0;
}
~ianmdlvl / elogind.git / blobdiff