/*
- * udevtrigger.c
- *
* Copyright (C) 2004-2006 Kay Sievers <kay@vrfy.org>
* Copyright (C) 2006 Hannes Reinecke <hare@suse.de>
*
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <string.h>
#include <stdio.h>
#include <unistd.h>
+#include <getopt.h>
#include <errno.h>
#include <dirent.h>
#include <fcntl.h>
#include <syslog.h>
+#include <fnmatch.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "udev.h"
+#include "udevd.h"
-static const char *udev_log_str;
static int verbose;
static int dry_run;
+LIST_HEAD(device_list);
+LIST_HEAD(filter_subsystem_match_list);
+LIST_HEAD(filter_subsystem_nomatch_list);
+LIST_HEAD(filter_attr_match_list);
+LIST_HEAD(filter_attr_nomatch_list);
#ifdef USE_LOG
void log_message(int priority, const char *format, ...)
}
#endif
-/* list of devices that we should run last due to any one of a number of reasons */
-static char *last_list[] = {
- "/class/block/md",
- "/class/block/dm-",
- "/block/md",
- "/block/dm-",
- NULL
-};
-
-/* list of devices that we should run first due to any one of a number of reasons */
-static char *first_list[] = {
- "/class/mem",
- "/class/tty",
- NULL
-};
+/* devices that should run last cause of their dependencies */
+static int delay_device(const char *devpath)
+{
+ static const char *delay_device_list[] = {
+ "*/md*",
+ "*/dm-*",
+ NULL
+ };
+ int i;
-LIST_HEAD(device_first_list);
-LIST_HEAD(device_default_list);
-LIST_HEAD(device_last_list);
+ for (i = 0; delay_device_list[i] != NULL; i++)
+ if (fnmatch(delay_device_list[i], devpath, 0) == 0)
+ return 1;
+ return 0;
+}
static int device_list_insert(const char *path)
{
- struct list_head *device_list = &device_default_list;
- const char *devpath = &path[strlen(sysfs_path)];
- int i;
-
- for (i = 0; first_list[i] != NULL; i++) {
- if (strncmp(devpath, first_list[i], strlen(first_list[i])) == 0) {
- device_list = &device_first_list;
- break;
- }
- }
- for (i = 0; last_list[i] != NULL; i++) {
- if (strncmp(devpath, last_list[i], strlen(last_list[i])) == 0) {
- device_list = &device_last_list;
- break;
- }
- }
+ char filename[PATH_SIZE];
+ char devpath[PATH_SIZE];
+ struct stat statbuf;
dbg("add '%s'" , path);
- /* double entries will be ignored */
- name_list_add(device_list, path, 0);
+
+ /* we only have a device, if we have an uevent file */
+ strlcpy(filename, path, sizeof(filename));
+ strlcat(filename, "/uevent", sizeof(filename));
+ if (stat(filename, &statbuf) < 0)
+ return -1;
+ if (!(statbuf.st_mode & S_IWUSR))
+ return -1;
+
+ strlcpy(devpath, &path[strlen(sysfs_path)], sizeof(devpath));
+
+ /* resolve possible link to real target */
+ if (lstat(path, &statbuf) < 0)
+ return -1;
+ if (S_ISLNK(statbuf.st_mode))
+ if (sysfs_resolve_link(devpath, sizeof(devpath)) != 0)
+ return -1;
+
+ name_list_add(&device_list, devpath, 1);
return 0;
}
-static void trigger_uevent(const char *path)
+static void trigger_uevent(const char *devpath, const char *action)
{
char filename[PATH_SIZE];
int fd;
- strlcpy(filename, path, sizeof(filename));
+ strlcpy(filename, sysfs_path, sizeof(filename));
+ strlcat(filename, devpath, sizeof(filename));
strlcat(filename, "/uevent", sizeof(filename));
if (verbose)
- printf("%s\n", path);
+ printf("%s\n", devpath);
if (dry_run)
return;
fd = open(filename, O_WRONLY);
if (fd < 0) {
- dbg("error on opening %s: %s\n", filename, strerror(errno));
+ dbg("error on opening %s: %s", filename, strerror(errno));
return;
}
- if (write(fd, "add", 3) < 0)
- info("error on triggering %s: %s\n", filename, strerror(errno));
+ if (write(fd, action, strlen(action)) < 0)
+ info("error writing '%s' to '%s': %s", action, filename, strerror(errno));
close(fd);
}
-static void exec_lists(void)
+static void exec_list(const char *action)
{
struct name_entry *loop_device;
struct name_entry *tmp_device;
- /* handle the devices on the "first" list first */
- list_for_each_entry_safe(loop_device, tmp_device, &device_first_list, node) {
- trigger_uevent(loop_device->name);
+ list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) {
+ if (delay_device(loop_device->name))
+ continue;
+
+ trigger_uevent(loop_device->name, action);
list_del(&loop_device->node);
free(loop_device);
}
- /* handle the devices on the "default" list next */
- list_for_each_entry_safe(loop_device, tmp_device, &device_default_list, node) {
- trigger_uevent(loop_device->name);
+ /* trigger remaining delayed devices */
+ list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) {
+ trigger_uevent(loop_device->name, action);
list_del(&loop_device->node);
free(loop_device);
}
+}
- /* handle devices on the "last" list, if any */
- list_for_each_entry_safe(loop_device, tmp_device, &device_last_list, node) {
- trigger_uevent(loop_device->name);
- list_del(&loop_device->node);
- free(loop_device);
+static int subsystem_filtered(const char *subsystem)
+{
+ struct name_entry *loop_name;
+
+ /* skip devices matching the listed subsystems */
+ list_for_each_entry(loop_name, &filter_subsystem_nomatch_list, node)
+ if (fnmatch(loop_name->name, subsystem, 0) == 0)
+ return 1;
+
+ /* skip devices not matching the listed subsystems */
+ if (!list_empty(&filter_subsystem_match_list)) {
+ list_for_each_entry(loop_name, &filter_subsystem_match_list, node)
+ if (fnmatch(loop_name->name, subsystem, 0) == 0)
+ return 0;
+ return 1;
}
+
+ return 0;
}
-static int is_device(const char *path)
+static int attr_match(const char *path, const char *attr_value)
{
- char filename[PATH_SIZE];
- struct stat statbuf;
+ char attr[NAME_SIZE];
+ char file[PATH_SIZE];
+ char *match_value;
- /* look for the uevent file of the kobject */
- strlcpy(filename, path, sizeof(filename));
- strlcat(filename, "/uevent", sizeof(filename));
- if (stat(filename, &statbuf) < 0)
- return 0;
+ strlcpy(attr, attr_value, sizeof(attr));
- if (!(statbuf.st_mode & S_IWUSR))
- return 0;
+ /* separate attr and match value */
+ match_value = strchr(attr, '=');
+ if (match_value != NULL) {
+ match_value[0] = '\0';
+ match_value = &match_value[1];
+ }
+
+ strlcpy(file, path, sizeof(file));
+ strlcat(file, "/", sizeof(file));
+ strlcat(file, attr, sizeof(file));
+
+ if (match_value != NULL) {
+ /* match file content */
+ char value[NAME_SIZE];
+ int fd;
+ ssize_t size;
+
+ fd = open(file, O_RDONLY);
+ if (fd < 0)
+ return 0;
+ size = read(fd, value, sizeof(value));
+ close(fd);
+ if (size < 0)
+ return 0;
+ value[size] = '\0';
+ remove_trailing_chars(value, '\n');
+
+ /* match if attribute value matches */
+ if (fnmatch(match_value, value, 0) == 0)
+ return 1;
+ } else {
+ /* match if attribute exists */
+ struct stat statbuf;
+
+ if (stat(file, &statbuf) == 0)
+ return 1;
+ }
+ return 0;
+}
- return 1;
+static int attr_filtered(const char *path)
+{
+ struct name_entry *loop_name;
+
+ /* skip devices matching the listed sysfs attributes */
+ list_for_each_entry(loop_name, &filter_attr_nomatch_list, node)
+ if (attr_match(path, loop_name->name))
+ return 1;
+
+ /* skip devices not matching the listed sysfs attributes */
+ if (!list_empty(&filter_attr_match_list)) {
+ list_for_each_entry(loop_name, &filter_attr_match_list, node)
+ if (attr_match(path, loop_name->name))
+ return 0;
+ return 1;
+ }
+ return 0;
}
-static void udev_scan_bus(void)
+enum scan_type {
+ SCAN_DEVICES,
+ SCAN_SUBSYSTEM,
+};
+
+static void scan_subsystem(const char *subsys, enum scan_type scan)
{
char base[PATH_SIZE];
DIR *dir;
struct dirent *dent;
+ const char *subdir;
+
+ if (scan == SCAN_DEVICES)
+ subdir = "/devices";
+ else if (scan == SCAN_SUBSYSTEM)
+ subdir = "/drivers";
+ else
+ return;
strlcpy(base, sysfs_path, sizeof(base));
- strlcat(base, "/bus", sizeof(base));
+ strlcat(base, "/", sizeof(base));
+ strlcat(base, subsys, sizeof(base));
dir = opendir(base);
if (dir != NULL) {
if (dent->d_name[0] == '.')
continue;
+ if (scan == SCAN_DEVICES)
+ if (subsystem_filtered(dent->d_name))
+ continue;
+
strlcpy(dirname, base, sizeof(dirname));
strlcat(dirname, "/", sizeof(dirname));
strlcat(dirname, dent->d_name, sizeof(dirname));
- strlcat(dirname, "/devices", sizeof(dirname));
- /* look for devices */
+ if (scan == SCAN_SUBSYSTEM) {
+ if (!subsystem_filtered("subsystem"))
+ device_list_insert(dirname);
+ if (subsystem_filtered("drivers"))
+ continue;
+ }
+
+ strlcat(dirname, subdir, sizeof(dirname));
+
+ /* look for devices/drivers */
dir2 = opendir(dirname);
if (dir2 != NULL) {
for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
strlcpy(dirname2, dirname, sizeof(dirname2));
strlcat(dirname2, "/", sizeof(dirname2));
strlcat(dirname2, dent2->d_name, sizeof(dirname2));
-
- if (is_device(dirname2))
- device_list_insert(dirname2);
+ if (attr_filtered(dirname2))
+ continue;
+ device_list_insert(dirname2);
}
closedir(dir2);
}
}
}
-static void udev_scan_block(void)
+static void scan_block(void)
{
char base[PATH_SIZE];
DIR *dir;
struct dirent *dent;
- struct stat statbuf;
- /* skip if "block" is already a "class" */
- strlcpy(base, sysfs_path, sizeof(base));
- strlcat(base, "/class/block", sizeof(base));
- if (stat(base, &statbuf) == 0)
+ if (subsystem_filtered("block"))
return;
strlcpy(base, sysfs_path, sizeof(base));
strlcpy(dirname, base, sizeof(dirname));
strlcat(dirname, "/", sizeof(dirname));
strlcat(dirname, dent->d_name, sizeof(dirname));
- if (is_device(dirname))
- device_list_insert(dirname);
- else
+ if (attr_filtered(dirname))
+ continue;
+ if (device_list_insert(dirname) != 0)
continue;
/* look for partitions */
strlcpy(dirname2, dirname, sizeof(dirname2));
strlcat(dirname2, "/", sizeof(dirname2));
strlcat(dirname2, dent2->d_name, sizeof(dirname2));
- if (is_device(dirname2))
- device_list_insert(dirname2);
+ if (attr_filtered(dirname2))
+ continue;
+ device_list_insert(dirname2);
}
closedir(dir2);
}
}
}
-static void udev_scan_class(void)
+static void scan_class(void)
{
char base[PATH_SIZE];
DIR *dir;
if (dent->d_name[0] == '.')
continue;
+ if (subsystem_filtered(dent->d_name))
+ continue;
+
strlcpy(dirname, base, sizeof(dirname));
strlcat(dirname, "/", sizeof(dirname));
strlcat(dirname, dent->d_name, sizeof(dirname));
strlcpy(dirname2, dirname, sizeof(dirname2));
strlcat(dirname2, "/", sizeof(dirname2));
strlcat(dirname2, dent2->d_name, sizeof(dirname2));
- if (is_device(dirname2))
- device_list_insert(dirname2);
+ if (attr_filtered(dirname2))
+ continue;
+ device_list_insert(dirname2);
}
closedir(dir2);
}
}
}
+static void scan_failed(void)
+{
+ char base[PATH_SIZE];
+ DIR *dir;
+ struct dirent *dent;
+
+ strlcpy(base, udev_root, sizeof(base));
+ strlcat(base, "/" EVENT_FAILED_DIR, sizeof(base));
+
+ dir = opendir(base);
+ if (dir != NULL) {
+ for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+ char device[PATH_SIZE];
+ size_t start;
+
+ if (dent->d_name[0] == '.')
+ continue;
+
+ start = strlcpy(device, sysfs_path, sizeof(device));
+ strlcat(device, dent->d_name, sizeof(device));
+ path_decode(&device[start]);
+ device_list_insert(device);
+ }
+ closedir(dir);
+ }
+}
+
int main(int argc, char *argv[], char *envp[])
{
- int i;
+ int failed = 0;
+ int option;
+ const char *action = "add";
+ static const struct option options[] = {
+ { "verbose", 0, NULL, 'v' },
+ { "dry-run", 0, NULL, 'n' },
+ { "retry-failed", 0, NULL, 'F' },
+ { "help", 0, NULL, 'h' },
+ { "action", 1, NULL, 'c' },
+ { "subsystem-match", 1, NULL, 's' },
+ { "subsystem-nomatch", 1, NULL, 'S' },
+ { "attr-match", 1, NULL, 'a' },
+ { "attr-nomatch", 1, NULL, 'A' },
+ {}
+ };
logging_init("udevtrigger");
udev_config_init();
dbg("version %s", UDEV_VERSION);
+ sysfs_init();
- udev_log_str = getenv("UDEV_LOG");
-
- for (i = 1 ; i < argc; i++) {
- char *arg = argv[i];
+ while (1) {
+ option = getopt_long(argc, argv, "vnFhc:s:S:a:A:", options, NULL);
+ if (option == -1)
+ break;
- if (strcmp(arg, "--verbose") == 0 || strcmp(arg, "-v") == 0)
+ switch (option) {
+ case 'v':
verbose = 1;
- else if (strcmp(arg, "--dry-run") == 0 || strcmp(arg, "-n") == 0)
+ break;
+ case 'n':
dry_run = 1;
- else {
- fprintf(stderr, "Usage: udevtrigger [--verbose] [--dry-run]\n");
+ break;
+ case 'F':
+ failed = 1;
+ break;
+ case 'c':
+ action = optarg;
+ break;
+ case 's':
+ name_list_add(&filter_subsystem_match_list, optarg, 0);
+ break;
+ case 'S':
+ name_list_add(&filter_subsystem_nomatch_list, optarg, 0);
+ break;
+ case 'a':
+ name_list_add(&filter_attr_match_list, optarg, 0);
+ break;
+ case 'A':
+ name_list_add(&filter_attr_nomatch_list, optarg, 0);
+ break;
+ case 'h':
+ printf("Usage: udevtrigger OPTIONS\n"
+ " --verbose print the list of devices while running\n"
+ " --dry-run do not actually trigger the events\n"
+ " --retry-failed trigger only the events which have been\n"
+ " marked as failed during a previous run\n"
+ " --subsystem-match=<subsystem> trigger devices from a matching subystem\n"
+ " --subsystem-nomatch=<subsystem> exclude devices from a matching subystem\n"
+ " --attr-match=<file[=<value>]> trigger devices with a matching sysfs\n"
+ " attribute\n"
+ " --attr-nomatch=<file[=<value>]> exclude devices with a matching sysfs\n"
+ " attribute\n"
+ " --help print this text\n"
+ "\n");
+ goto exit;
+ default:
goto exit;
}
}
- sysfs_init();
+ if (failed) {
+ scan_failed();
+ exec_list(action);
+ } else {
+ char base[PATH_SIZE];
+ struct stat statbuf;
+
+ /* if we have /sys/subsystem, forget all the old stuff */
+ strlcpy(base, sysfs_path, sizeof(base));
+ strlcat(base, "/subsystem", sizeof(base));
+ if (stat(base, &statbuf) == 0) {
+ scan_subsystem("subsystem", SCAN_SUBSYSTEM);
+ exec_list(action);
+ scan_subsystem("subsystem", SCAN_DEVICES);
+ exec_list(action);
+ } else {
+ scan_subsystem("bus", SCAN_SUBSYSTEM);
+ exec_list(action);
+ scan_subsystem("bus", SCAN_DEVICES);
+ scan_class();
+
+ /* scan "block" if it isn't a "class" */
+ strlcpy(base, sysfs_path, sizeof(base));
+ strlcat(base, "/class/block", sizeof(base));
+ if (stat(base, &statbuf) != 0)
+ scan_block();
+ exec_list(action);
+ }
+ }
- udev_scan_bus();
- udev_scan_class();
- udev_scan_block();
- exec_lists();
+exit:
+ name_list_cleanup(&filter_subsystem_match_list);
+ name_list_cleanup(&filter_subsystem_nomatch_list);
+ name_list_cleanup(&filter_attr_match_list);
+ name_list_cleanup(&filter_attr_nomatch_list);
sysfs_cleanup();
-exit:
logging_close();
return 0;
}
~ianmdlvl / elogind.git / blobdiff