*
* Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
*
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
*/
-#include "config.h"
-
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <errno.h>
#include <string.h>
#include <dirent.h>
+#include <fnmatch.h>
#include <sys/stat.h>
#include "libudev.h"
#include "libudev-private.h"
-static int devices_scan_subsystem(struct udev *udev,
- const char *basedir, const char *subsystem, const char *subdir,
- struct list_head *device_list)
+static int devices_sort(struct udev_enumerate *udev_enumerate);
+
+struct udev_enumerate {
+ struct udev *udev;
+ int refcount;
+ struct udev_list_node sysattr_match_list;
+ struct udev_list_node sysattr_nomatch_list;
+ struct udev_list_node subsystem_match_list;
+ struct udev_list_node subsystem_nomatch_list;
+ struct udev_list_node properties_match_list;
+ struct udev_list_node devices_list;
+ int devices_sorted;
+};
+
+/**
+ * udev_enumerate_new:
+ * @udev: udev library context
+ *
+ * Returns: an enumeration context
+ **/
+struct udev_enumerate *udev_enumerate_new(struct udev *udev)
+{
+ struct udev_enumerate *udev_enumerate;
+
+ udev_enumerate = calloc(1, sizeof(struct udev_enumerate));
+ if (udev_enumerate == NULL)
+ return NULL;
+ udev_enumerate->refcount = 1;
+ udev_enumerate->udev = udev;
+ udev_list_init(&udev_enumerate->devices_list);
+ udev_list_init(&udev_enumerate->sysattr_match_list);
+ udev_list_init(&udev_enumerate->sysattr_nomatch_list);
+ udev_list_init(&udev_enumerate->subsystem_match_list);
+ udev_list_init(&udev_enumerate->subsystem_nomatch_list);
+ udev_list_init(&udev_enumerate->properties_match_list);
+ return udev_enumerate;
+}
+
+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;
+ udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->devices_list);
+ udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->sysattr_match_list);
+ udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->sysattr_nomatch_list);
+ udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->subsystem_match_list);
+ udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->subsystem_nomatch_list);
+ udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->properties_match_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;
+ if (!udev_enumerate->devices_sorted)
+ devices_sort(udev_enumerate);
+ return udev_list_get_entry(&udev_enumerate->devices_list);
+}
+
+int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem)
+{
+ if (udev_enumerate == NULL)
+ return -EINVAL;
+ if (subsystem == NULL)
+ return 0;
+ if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate),
+ &udev_enumerate->subsystem_match_list, subsystem, NULL, 1, 0) == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem)
+{
+ if (udev_enumerate == NULL)
+ return -EINVAL;
+ if (subsystem == NULL)
+ return 0;
+ if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate),
+ &udev_enumerate->subsystem_nomatch_list, subsystem, NULL, 1, 0) == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value)
+{
+ if (udev_enumerate == NULL)
+ return -EINVAL;
+ if (sysattr == NULL)
+ return 0;
+ if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate),
+ &udev_enumerate->sysattr_match_list, sysattr, value, 1, 0) == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+int udev_enumerate_add_nomatch_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value)
{
+ if (udev_enumerate == NULL)
+ return -EINVAL;
+ if (sysattr == NULL)
+ return 0;
+ if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate),
+ &udev_enumerate->sysattr_nomatch_list, sysattr, value, 1, 0) == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static int match_sysattr_value(struct udev *udev, const char *syspath, const char *sysattr, const char *match_val)
+{
+ struct udev_device *device;
+ const char *val = NULL;
+ int match = 0;
+
+ device = udev_device_new_from_syspath(udev, syspath);
+ if (device == NULL)
+ return -EINVAL;
+ val = udev_device_get_sysattr_value(device, sysattr);
+ if (val == NULL)
+ goto exit;
+ if (match_val == NULL) {
+ match = 1;
+ goto exit;
+ }
+ if (fnmatch(match_val, val, 0) == 0) {
+ match = 1;
+ goto exit;
+ }
+exit:
+ udev_device_unref(device);
+ return match;
+}
+
+int udev_enumerate_add_match_property(struct udev_enumerate *udev_enumerate, const char *property, const char *value)
+{
+ if (udev_enumerate == NULL)
+ return -EINVAL;
+ if (property == NULL)
+ return 0;
+ if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate),
+ &udev_enumerate->properties_match_list, property, value, 1, 0) == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static int match_sysattr(struct udev_enumerate *udev_enumerate, const char *syspath)
+{
+ struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
+ struct udev_list_entry *list_entry;
+
+ /* skip list */
+ udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->sysattr_nomatch_list)) {
+ if (match_sysattr_value(udev, syspath,
+ udev_list_entry_get_name(list_entry),
+ udev_list_entry_get_value(list_entry)))
+ return 0;
+ }
+ /* include list */
+ if (udev_list_get_entry(&udev_enumerate->sysattr_match_list) != NULL) {
+ udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->sysattr_match_list)) {
+ /* anything that does not match, will make it FALSE */
+ if (!match_sysattr_value(udev, syspath,
+ udev_list_entry_get_name(list_entry),
+ udev_list_entry_get_value(list_entry)))
+ return 0;
+ }
+ return 1;
+ }
+ return 1;
+}
+
+static int match_property(struct udev_enumerate *udev_enumerate, const char *syspath)
+{
+ struct udev_device *dev;
+ struct udev_list_entry *list_entry;
+ int match = 0;
+
+ /* no match always matches */
+ if (udev_list_get_entry(&udev_enumerate->properties_match_list) == NULL)
+ return 1;
+
+ /* no device does not match */
+ dev = udev_device_new_from_syspath(udev_enumerate->udev, syspath);
+ if (dev == NULL)
+ return 0;
+
+ /* loop over matches */
+ udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->properties_match_list)) {
+ struct udev_list_entry *property_entry;
+
+ /* loop over device properties */
+ udev_list_entry_foreach(property_entry, udev_device_get_properties_list_entry(dev)) {
+ if (fnmatch(udev_list_entry_get_name(list_entry), udev_list_entry_get_name(property_entry), 0) == 0) {
+ const char *match_value;
+ const char *dev_value;
+
+ match_value = udev_list_entry_get_value(list_entry);
+ dev_value = udev_list_entry_get_value(property_entry);
+ if (match_value == NULL && dev_value == NULL) {
+ match = 1;
+ goto out;
+ }
+ if (match_value == NULL || dev_value == NULL)
+ continue;
+ if (fnmatch(match_value, dev_value, 0) == 0) {
+ match = 1;
+ goto out;
+ }
+ }
+ }
+ }
+out:
+ udev_device_unref(dev);
+ return match;
+}
+
+static int scan_dir_and_add_devices(struct udev_enumerate *udev_enumerate,
+ const char *basedir, const char *subdir1, const char *subdir2)
+{
+ struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
char path[UTIL_PATH_SIZE];
DIR *dir;
struct dirent *dent;
util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
- util_strlcat(path, basedir, sizeof(path));
util_strlcat(path, "/", sizeof(path));
- util_strlcat(path, subsystem, sizeof(path));
- if (subdir != NULL)
- util_strlcat(path, subdir, sizeof(path));
+ util_strlcat(path, basedir, sizeof(path));
+ if (subdir1 != NULL) {
+ util_strlcat(path, "/", sizeof(path));
+ util_strlcat(path, subdir1, sizeof(path));
+ }
+ if (subdir2 != NULL) {
+ util_strlcat(path, "/", sizeof(path));
+ util_strlcat(path, subdir2, sizeof(path));
+ }
dir = opendir(path);
if (dir == NULL)
return -1;
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
char syspath[UTIL_PATH_SIZE];
+ char filename[UTIL_PATH_SIZE];
+ struct stat statbuf;
if (dent->d_name[0] == '.')
continue;
util_strlcpy(syspath, path, sizeof(syspath));
util_strlcat(syspath, "/", sizeof(syspath));
util_strlcat(syspath, dent->d_name, sizeof(syspath));
- util_resolve_sys_link(udev, syspath, sizeof(syspath));
- util_name_list_add(udev, device_list, syspath, NULL, 1);
+ if (lstat(syspath, &statbuf) != 0)
+ continue;
+ if (S_ISREG(statbuf.st_mode))
+ continue;
+ if (S_ISLNK(statbuf.st_mode))
+ util_resolve_sys_link(udev, syspath, sizeof(syspath));
+ util_strlcpy(filename, syspath, sizeof(filename));
+ util_strlcat(filename, "/uevent", sizeof(filename));
+ if (stat(filename, &statbuf) != 0)
+ continue;
+ if (!match_sysattr(udev_enumerate, syspath))
+ continue;
+ if (!match_property(udev_enumerate, syspath))
+ continue;
+ udev_list_entry_add(udev, &udev_enumerate->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)
+static int match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem)
+{
+ struct udev_list_entry *list_entry;
+
+ udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->subsystem_nomatch_list)) {
+ if (fnmatch(udev_list_entry_get_name(list_entry), subsystem, 0) == 0)
+ return 0;
+ }
+ if (udev_list_get_entry(&udev_enumerate->subsystem_match_list) != NULL) {
+ udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->subsystem_match_list)) {
+ if (fnmatch(udev_list_entry_get_name(list_entry), subsystem, 0) == 0)
+ return 1;
+ }
+ return 0;
+ }
+ return 1;
+}
+
+static int scan_dir(struct udev_enumerate *udev_enumerate, const char *basedir, const char *subdir, const char *subsystem)
{
+ struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
+
char path[UTIL_PATH_SIZE];
DIR *dir;
struct dirent *dent;
- if (subsystem != NULL)
- return devices_scan_subsystem(udev, basedir, subsystem, subdir, device_list);
-
util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
+ util_strlcat(path, "/", sizeof(path));
util_strlcat(path, basedir, sizeof(path));
dir = opendir(path);
if (dir == NULL)
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 (!match_subsystem(udev_enumerate, subsystem != NULL ? subsystem : dent->d_name))
+ continue;
+ scan_dir_and_add_devices(udev_enumerate, basedir, dent->d_name, subdir);
}
closedir(dir);
return 0;
int i;
len = strlen(udev_get_sys_path(udev));
-
for (i = 0; delay_device_list[i] != NULL; i++) {
if (strstr(&syspath[len], delay_device_list[i]) != NULL) {
- info(udev, "delaying: %s\n", syspath);
+ dbg(udev, "delaying: %s\n", syspath);
return 1;
}
}
return 0;
}
-static int devices_call(struct udev *udev, const char *syspath,
- int (*cb)(struct udev *udev,
- const char *syspath, const char *subsystem, const char *name,
- void *data),
- void *data,
- int *cb_rc)
+/* sort delayed devices to the end of the list */
+static int devices_sort(struct udev_enumerate *udev_enumerate)
{
- char subsystem[UTIL_PATH_SIZE];
- const char *name;
+ struct udev_list_entry *entry_loop;
+ struct udev_list_entry *entry_tmp;
+ struct udev_list_node devices_list;
- name = strrchr(syspath, '/');
- if (name == NULL)
- return -1;
- name++;
+ udev_list_init(&devices_list);
+ /* move delayed to delay list */
+ udev_list_entry_foreach_safe(entry_loop, entry_tmp, udev_list_get_entry(&udev_enumerate->devices_list)) {
+ if (devices_delay(udev_enumerate->udev, udev_list_entry_get_name(entry_loop))) {
+ udev_list_entry_remove(entry_loop);
+ udev_list_entry_append(entry_loop, &devices_list);
+ }
+ }
+ /* move delayed back to end of list */
+ udev_list_entry_foreach_safe(entry_loop, entry_tmp, udev_list_get_entry(&devices_list)) {
+ udev_list_entry_remove(entry_loop);
+ udev_list_entry_append(entry_loop, &udev_enumerate->devices_list);
+ }
+ udev_enumerate->devices_sorted = 1;
+ return 0;
+}
- if (util_get_sys_subsystem(udev, syspath, subsystem, sizeof(subsystem)) < 2)
- return -1;
- *cb_rc = cb(udev, syspath, subsystem, name, data);
+int udev_enumerate_add_syspath(struct udev_enumerate *udev_enumerate, const char *syspath)
+{
+ struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
+ struct udev_device *udev_device;
+
+ if (udev_enumerate == NULL)
+ return -EINVAL;
+ if (syspath == NULL)
+ return 0;
+ /* resolve to real syspath */
+ udev_device = udev_device_new_from_syspath(udev_enumerate->udev, syspath);
+ if (udev_device == NULL)
+ return -EINVAL;
+ udev_list_entry_add(udev, &udev_enumerate->devices_list,
+ udev_device_get_syspath(udev_device), NULL, 1, 1);
+ udev_device_unref(udev_device);
return 0;
}
/**
- * 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
*
- * Returns: the number of properties passed to the caller, or a negative value on error
+ * Returns: a negative value on error.
**/
-int udev_enumerate_devices(struct udev *udev, const char *subsystem,
- int (*cb)(struct udev *udev,
- const char *syspath, const char *subsystem, const char *name, void *data),
- void *data)
+int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate)
{
+ struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
char base[UTIL_PATH_SIZE];
struct stat statbuf;
- struct list_head device_list;
- struct util_name_entry *loop_device;
- struct util_name_entry *tmp_device;
- int cb_rc = 0;
- int count = 0;
- INIT_LIST_HEAD(&device_list);
-
- /* if we have /sys/subsystem/, forget all the old stuff */
+ 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) {
- devices_scan_subsystems(udev, "/subsystem", subsystem, "/devices", &device_list);
+ /* we have /subsystem/, forget all the old stuff */
+ dbg(udev, "searching '/subsystem/*/devices/*' dir\n");
+ scan_dir(udev_enumerate, "subsystem", "devices", NULL);
} else {
- devices_scan_subsystems(udev, "/bus", subsystem, "/devices", &device_list);
- devices_scan_subsystems(udev, "/class", subsystem, NULL, &device_list);
+ dbg(udev, "searching '/bus/*/devices/*' dir\n");
+ scan_dir(udev_enumerate, "bus", "devices", NULL);
+ dbg(udev, "searching '/class/*' dir\n");
+ scan_dir(udev_enumerate, "class", NULL, NULL);
+ /* 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) {
+ if (match_subsystem(udev_enumerate, "block")) {
+ dbg(udev, "searching '/block/*' dir\n");
+ /* scan disks */
+ scan_dir_and_add_devices(udev_enumerate, "block", NULL, NULL);
+ /* scan partitions */
+ dbg(udev, "searching '/block/*/*' dir\n");
+ scan_dir(udev_enumerate, "block", NULL, "block");
+ }
+ }
}
+ return 0;
+}
- 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->name);
- free(loop_device);
- }
+/**
+ * udev_enumerate_scan_subsystems:
+ * @udev_enumerate: udev enumeration context
+ *
+ * Returns: a negative value on error.
+ **/
+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;
- /* 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->name);
- free(loop_device);
+ 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";
+ if (match_subsystem(udev_enumerate, "subsystem")) {
+ dbg(udev, "searching '%s/*' dir\n", subsysdir);
+ scan_dir_and_add_devices(udev_enumerate, subsysdir, NULL, NULL);
}
-
- return count;
+ if (match_subsystem(udev_enumerate, "drivers")) {
+ dbg(udev, "searching '%s/*/drivers/*' dir\n", subsysdir);
+ scan_dir(udev_enumerate, subsysdir, "drivers", "drivers");
+ }
+ return 0;
}
~ianmdlvl / elogind.git / blobdiff