* 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 <stdarg.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
-#include <dirent.h>
-#include <sys/stat.h>
+#include <ctype.h>
#include "libudev.h"
#include "libudev-private.h"
-#include "../udev.h"
+
+struct udev {
+ int refcount;
+ void (*log_fn)(struct udev *udev,
+ int priority, const char *file, int line, const char *fn,
+ const char *format, va_list args);
+ void *userdata;
+ char *sys_path;
+ char *dev_path;
+ char *rules_path;
+ struct udev_list_node properties_list;
+ int log_priority;
+ int run;
+};
void udev_log(struct udev *udev,
int priority, const char *file, int line, const char *fn,
{
va_list args;
+ if (priority > udev->log_priority)
+ return;
+
va_start(args, format);
udev->log_fn(udev, priority, file, line, fn, format, args);
va_end(args);
int priority, const char *file, int line, const char *fn,
const char *format, va_list args)
{
- static int log = -1;
-
- if (log == -1) {
- if (getenv("LIBUDEV_DEBUG") != NULL)
- log = 1;
- else
- log = 0;
- }
-
- if (log == 1) {
- fprintf(stderr, "libudev: %s: ", fn);
- vfprintf(stderr, format, args);
- }
+ fprintf(stderr, "libudev: %s: ", fn);
+ vfprintf(stderr, format, args);
}
-/* glue to udev logging, needed until udev logging code is "fixed" */
-#ifdef USE_LOG
-void log_message(int priority, const char *format, ...)
+void *udev_get_userdata(struct udev *udev)
{
- va_list args;
-
- va_start(args, format);
- log_stderr(NULL, priority, NULL, 0, "", format, args);
- va_end(args);
+ if (udev == NULL)
+ return NULL;
+ return udev->userdata;
}
-#endif
-static ssize_t get_subsystem(struct udev *udev, const char *devpath, char *subsystem, size_t size)
+void udev_set_userdata(struct udev *udev, void *userdata)
{
- char path[PATH_SIZE];
- ssize_t len;
- const char *pos;
-
- strlcpy(path, udev_get_sys_path(udev), sizeof(path));
- strlcat(path, devpath, sizeof(path));
- strlcat(path, "/subsystem", sizeof(path));
- len = readlink(path, path, sizeof(path));
- if (len < 0 || len >= (ssize_t) sizeof(path))
- return -1;
- path[len] = '\0';
- pos = strrchr(path, '/');
- if (pos == NULL)
- return -1;
- pos = &pos[1];
- return strlcpy(subsystem, pos, size);
+ if (udev == NULL)
+ return;
+ udev->userdata = userdata;
}
/**
* Create udev library context.
*
* The initial refcount is 1, and needs to be decremented to
- * release the ressources of the udev library context.
+ * release the resources of the udev library context.
*
* Returns: a new udev library context
**/
struct udev *udev_new(void)
{
struct udev *udev;
+ const char *env;
+ char *config_file;
+ FILE *f;
- udev = malloc(sizeof(struct udev));
+ udev = calloc(1, sizeof(struct udev));
if (udev == NULL)
return NULL;
- memset(udev, 0x00, (sizeof(struct udev)));
udev->refcount = 1;
udev->log_fn = log_stderr;
- udev_config_init();
- sysfs_init();
- log_info(udev, "context %p created\n", udev);
+ udev->log_priority = LOG_ERR;
+ udev_list_init(&udev->properties_list);
+ udev->run = 1;
+ udev->dev_path = strdup(UDEV_PREFIX "/dev");
+ udev->sys_path = strdup("/sys");
+ config_file = strdup(SYSCONFDIR "/udev/udev.conf");
+ if (udev->dev_path == NULL ||
+ udev->sys_path == NULL ||
+ config_file == NULL)
+ goto err;
+
+ /* settings by environment and config file */
+ env = getenv("SYSFS_PATH");
+ if (env != NULL) {
+ free(udev->sys_path);
+ udev->sys_path = strdup(env);
+ util_remove_trailing_chars(udev->sys_path, '/');
+ udev_add_property(udev, "SYSFS_PATH", udev->sys_path);
+ }
+
+ env = getenv("UDEV_RUN");
+ if (env != NULL && strcmp(env, "0") == 0)
+ udev->run = 0;
+
+ env = getenv("UDEV_CONFIG_FILE");
+ if (env != NULL) {
+ free(config_file);
+ config_file = strdup(env);
+ util_remove_trailing_chars(config_file, '/');
+ }
+ if (config_file == NULL)
+ goto err;
+ f = fopen(config_file, "r");
+ if (f != NULL) {
+ char line[UTIL_LINE_SIZE];
+ int line_nr = 0;
+
+ while (fgets(line, sizeof(line), f)) {
+ size_t len;
+ char *key;
+ char *val;
+
+ line_nr++;
+
+ /* find key */
+ key = line;
+ while (isspace(key[0]))
+ key++;
+
+ /* comment or empty line */
+ if (key[0] == '#' || key[0] == '\0')
+ continue;
+
+ /* split key/value */
+ val = strchr(key, '=');
+ if (val == NULL) {
+ err(udev, "missing <key>=<value> in '%s'[%i], skip line\n", config_file, line_nr);
+ continue;
+ }
+ val[0] = '\0';
+ val++;
+
+ /* find value */
+ while (isspace(val[0]))
+ val++;
+
+ /* terminate key */
+ len = strlen(key);
+ if (len == 0)
+ continue;
+ while (isspace(key[len-1]))
+ len--;
+ key[len] = '\0';
+
+ /* terminate value */
+ len = strlen(val);
+ if (len == 0)
+ continue;
+ while (isspace(val[len-1]))
+ len--;
+ val[len] = '\0';
+
+ if (len == 0)
+ continue;
+
+ /* unquote */
+ if (val[0] == '"' || val[0] == '\'') {
+ if (val[len-1] != val[0]) {
+ err(udev, "inconsistent quoting in '%s'[%i], skip line\n", config_file, line_nr);
+ continue;
+ }
+ val[len-1] = '\0';
+ val++;
+ }
+
+ if (strcasecmp(key, "udev_log") == 0) {
+ udev_set_log_priority(udev, util_log_priority(val));
+ continue;
+ }
+ if (strcasecmp(key, "udev_root") == 0) {
+ free(udev->dev_path);
+ udev->dev_path = strdup(val);
+ util_remove_trailing_chars(udev->dev_path, '/');
+ continue;
+ }
+ if (strcasecmp(key, "udev_rules") == 0) {
+ free(udev->rules_path);
+ udev->rules_path = strdup(val);
+ util_remove_trailing_chars(udev->rules_path, '/');
+ continue;
+ }
+ }
+ fclose(f);
+ }
+
+ env = getenv("UDEV_ROOT");
+ if (env != NULL) {
+ free(udev->dev_path);
+ udev->dev_path = strdup(env);
+ util_remove_trailing_chars(udev->dev_path, '/');
+ udev_add_property(udev, "UDEV_ROOT", udev->dev_path);
+ }
+
+ env = getenv("UDEV_LOG");
+ if (env != NULL)
+ udev_set_log_priority(udev, util_log_priority(env));
+
+ if (udev->dev_path == NULL || udev->sys_path == NULL)
+ goto err;
+ dbg(udev, "context %p created\n", udev);
+ dbg(udev, "log_priority=%d\n", udev->log_priority);
+ dbg(udev, "config_file='%s'\n", config_file);
+ dbg(udev, "dev_path='%s'\n", udev->dev_path);
+ dbg(udev, "sys_path='%s'\n", udev->sys_path);
+ if (udev->rules_path != NULL)
+ dbg(udev, "rules_path='%s'\n", udev->rules_path);
+ free(config_file);
return udev;
+err:
+ free(config_file);
+ err(udev, "context creation failed\n");
+ udev_unref(udev);
+ return NULL;
}
/**
**/
struct udev *udev_ref(struct udev *udev)
{
+ if (udev == NULL)
+ return NULL;
udev->refcount++;
return udev;
}
* @udev: udev library context
*
* Drop a reference of the udev library context. If the refcount
- * reaches zero, the ressources of the context will be released.
+ * reaches zero, the resources of the context will be released.
*
**/
void udev_unref(struct udev *udev)
{
+ if (udev == NULL)
+ return;
udev->refcount--;
if (udev->refcount > 0)
return;
- sysfs_cleanup();
- log_info(udev, "context %p released\n", udev);
+ udev_list_cleanup_entries(udev, &udev->properties_list);
+ free(udev->dev_path);
+ free(udev->sys_path);
+ free(udev->rules_path);
+ dbg(udev, "context %p released\n", udev);
free(udev);
}
* @udev: udev library context
* @log_fn: function to be called for logging messages
*
- * The built-in logging, which writes to stderr if the
- * LIBUDEV_DEBUG environment variable is set, can be
+ * The built-in logging writes to stderr. It can be
* overridden by a custom function, to plug log messages
- * into the users logging functionality.
+ * into the users' logging functionality.
*
**/
void udev_set_log_fn(struct udev *udev,
const char *format, va_list args))
{
udev->log_fn = log_fn;
- log_info(udev, "custom logging function %p registered\n", udev);
+ info(udev, "custom logging function %p registered\n", udev);
+}
+
+int udev_get_log_priority(struct udev *udev)
+{
+ return udev->log_priority;
+}
+
+void udev_set_log_priority(struct udev *udev, int priority)
+{
+ char num[32];
+
+ udev->log_priority = priority;
+ snprintf(num, sizeof(num), "%u", udev->log_priority);
+ udev_add_property(udev, "UDEV_LOG", num);
+}
+
+const char *udev_get_rules_path(struct udev *udev)
+{
+ return udev->rules_path;
+}
+
+int udev_get_run(struct udev *udev)
+{
+ return udev->run;
}
/**
**/
const char *udev_get_sys_path(struct udev *udev)
{
- return sysfs_path;
+ if (udev == NULL)
+ return NULL;
+ return udev->sys_path;
}
/**
**/
const char *udev_get_dev_path(struct udev *udev)
{
- return udev_root;
-}
-
-static struct udev_device *device_init(struct udev *udev)
-{
- struct udev_device *udev_device;
-
- udev_device = malloc(sizeof(struct udev_device));
- if (udev_device == NULL)
+ if (udev == NULL)
return NULL;
- memset(udev_device, 0x00, sizeof(struct udev_device));
- udev_device->refcount = 1;
- udev_device->udev = udev;
- return udev_device;
+ return udev->dev_path;
}
-/**
- * udev_device_new_from_devpath:
- * @udev: udev library context
- * @devpath: sys device path
- *
- * Create new udev device, and fill in information from the sysfs
- * device and the udev database entry. The devpath must not contain
- * the sysfs mount path, and must contain a leading '/'.
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the ressources of the udev device.
- *
- * Returns: a new udev device, or #NULL, if it does not exist
- **/
-struct udev_device *udev_device_new_from_devpath(struct udev *udev, const char *devpath)
+struct udev_list_entry *udev_add_property(struct udev *udev, const char *key, const char *value)
{
- char path[PATH_SIZE];
- struct stat statbuf;
- struct udev_device *udev_device;
- int err;
-
- strlcpy(path, udev_get_sys_path(udev), sizeof(path));
- strlcat(path, devpath, sizeof(path));
- if (stat(path, &statbuf) != 0)
- return NULL;
- if (!S_ISDIR(statbuf.st_mode))
- return NULL;
+ if (value == NULL) {
+ struct udev_list_entry *list_entry;
- udev_device = device_init(udev);
- if (udev_device == NULL)
- return NULL;
-
- udev_device->udevice = udev_device_init(NULL);
- if (udev_device->udevice == NULL) {
- free(udev_device);
+ list_entry = udev_get_properties_list_entry(udev);
+ list_entry = udev_list_entry_get_by_name(list_entry, key);
+ if (list_entry != NULL)
+ udev_list_entry_delete(list_entry);
return NULL;
}
- log_info(udev, "device %p created\n", udev_device);
-
- strlcpy(path, devpath, sizeof(path));
- sysfs_resolve_link(path, sizeof(path));
-
- err = udev_db_get_device(udev_device->udevice, path);
- if (err >= 0)
- log_info(udev, "device %p filled with udev database data\n", udev_device);
- log_info(udev, "device %p filled with %s data\n", udev_device, udev_device_get_devpath(udev_device));
- return udev_device;
+ return udev_list_entry_add(udev, &udev->properties_list, key, value, 1, 0);
}
-/**
- * udev_device_get_udev:
- *
- * Retrieve the udev library context the device was created with.
- *
- * Returns: the udev library context
- **/
-struct udev *udev_device_get_udev(struct udev_device *udev_device)
+struct udev_list_entry *udev_get_properties_list_entry(struct udev *udev)
{
- return udev_device->udev;
-}
-
-/**
- * udev_device_ref:
- * @udev_device: udev device
- *
- * Take a reference of a udev device.
- *
- * Returns: the passed udev device
- **/
-struct udev_device *udev_device_ref(struct udev_device *udev_device)
-{
- udev_device->refcount++;
- return udev_device;
-}
-
-/**
- * udev_device_unref:
- * @udev_device: udev device
- *
- * Drop a reference of a udev device. If the refcount reaches zero,
- * the ressources of the device will be released.
- *
- **/
-void udev_device_unref(struct udev_device *udev_device)
-{
- udev_device->refcount--;
- if (udev_device->refcount > 0)
- return;
- udev_device_cleanup(udev_device->udevice);
- free(udev_device);
-}
-
-/**
- * udev_device_get_devpath:
- * @udev_device: udev device
- *
- * Retrieve the sys path of the udev device. The path does not contain
- * the sys mount point.
- *
- * Returns: the sys path of the udev device
- **/
-const char *udev_device_get_devpath(struct udev_device *udev_device)
-{
- return udev_device->udevice->dev->devpath;
-}
-
-/**
- * udev_device_get_devname:
- * @udev_device: udev device
- *
- * Retrieve the device node file name belonging to the udev device.
- * The path does not contain the device directory, and does not contain
- * a leading '/'.
- *
- * Returns: the device node file name of the udev device, or #NULL if no device node exists
- **/
-const char *udev_device_get_devname(struct udev_device *udev_device)
-{
- if (udev_device->udevice->name[0] == '\0')
- return NULL;
- return udev_device->udevice->name;
-}
-
-/**
- * udev_device_get_subsystem:
- * @udev_device: udev device
- *
- * Retrieve the subsystem string of the udev device. The string does not
- * contain any "/".
- *
- * Returns: the subsystem name of the udev device, or #NULL if it can not be determined
- **/
-const char *udev_device_get_subsystem(struct udev_device *udev_device)
-{
- struct sysfs_device *dev = udev_device->udevice->dev;
- if (dev->subsystem[0] != '\0')
- return dev->subsystem;
- if (get_subsystem(udev_device->udev, dev->devpath,
- dev->subsystem, sizeof(dev->subsystem)) < 2)
- return NULL;
- return dev->subsystem;
-}
-
-/**
- * udev_device_get_devlinks:
- * @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. If the function returns 1,
- * remaning device links will be ignored. The device link path
- * does not contain the device directory, and does not contain
- * a leading '/'.
- *
- * Returns: the number of device links passed to the caller, or a negative value on error
- **/
-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 name_entry *name_loop;
- int count = 0;
-
- list_for_each_entry(name_loop, &udev_device->udevice->symlink_list, node) {
- count++;
- if (cb(udev_device, name_loop->name, data) != 0)
- break;
- }
- return count;
-}
-
-/**
- * udev_device_get_properties:
- * @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.
- *
- * Returns: the number of properties passed to the caller, or a negative value on error
- **/
-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 name_entry *name_loop;
- int count = 0;
-
- list_for_each_entry(name_loop, &udev_device->udevice->env_list, node) {
- char name[PATH_SIZE];
- char *val;
-
- strncpy(name, name_loop->name, PATH_SIZE);
- name[PATH_SIZE-1] = '\0';
- val = strchr(name, '=');
- if (val == NULL)
- continue;
- val[0] = '\0';
- val = &val[1];
- if (cb(udev_device, name, val, data) != 0)
- break;
- }
- return count;
-}
-
-static int devices_scan_subsystem(struct udev *udev,
- const char *basedir, const char *subsystem, const char *subdir,
- struct list_head *device_list)
-{
- char path[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));
- if (subdir != NULL)
- 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];
-
- 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(devpath, sizeof(devpath));
- name_list_add(device_list, devpath, 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)
-{
- char path[PATH_SIZE];
- DIR *dir;
- struct dirent *dent;
-
- if (subsystem != NULL)
- return devices_scan_subsystem(udev, basedir, subsystem, subdir, device_list);
-
- 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);
- }
- closedir(dir);
- return 0;
-}
-
-static int devices_delay(struct udev *udev, const char *devpath)
-{
- static const char *delay_device_list[] = {
- "/block/md",
- "/block/dm-",
- NULL
- };
- int i;
-
- for (i = 0; delay_device_list[i] != NULL; i++) {
- if (strstr(devpath, delay_device_list[i]) != NULL) {
- log_info(udev, "delaying: %s\n", devpath);
- 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)
-{
- char subsystem[NAME_SIZE];
- const char *name;
-
- name = strrchr(devpath, '/');
- if (name == NULL)
- return -1;
- name++;
-
- if (get_subsystem(udev, devpath, subsystem, sizeof(subsystem)) < 2)
- return -1;
- *cb_rc = cb(udev, devpath, subsystem, name, data);
- return 0;
-}
-
-/**
- * udev_devices_enumerate:
- * @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.
- *
- * Returns: the number of properties passed to the caller, or a negative value on error
- **/
-int udev_devices_enumerate(struct udev *udev, const char *subsystem,
- int (*cb)(struct udev *udev,
- const char *devpath, const char *subsystem, const char *name, void *data),
- void *data)
-{
- char base[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;
-
- INIT_LIST_HEAD(&device_list);
-
- /* 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) {
- devices_scan_subsystems(udev, "/subsystem", subsystem, "/devices", &device_list);
- } else {
- devices_scan_subsystems(udev, "/bus", subsystem, "/devices", &device_list);
- devices_scan_subsystems(udev, "/class", subsystem, NULL, &device_list);
- }
-
- 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);
- }
-
- /* 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);
- }
-
- return count;
+ return udev_list_get_entry(&udev->properties_list);
}
~ianmdlvl / elogind.git / blobdiff