#include "libudev.h"
#include "libudev-private.h"
-#include "../udev.h"
-static struct udev_device *device_init(struct udev *udev)
+struct udev_device {
+ int refcount;
+ struct udev *udev;
+ char *syspath;
+ const char *devpath;
+ const char *sysname;
+ char *devname;
+ char *subsystem;
+ struct list_head link_list;
+ struct list_head env_list;
+ char *action;
+ char *driver;
+ char *devpath_old;
+ char *physdevpath;
+ int timeout;
+ dev_t devnum;
+ unsigned long long int seqnum;
+ int num_fake_partitions;
+ int devlink_priority;
+ int ignore_remove;
+};
+
+static size_t devpath_to_db_path(struct udev *udev, const char *devpath, char *filename, size_t len)
+{
+ size_t start;
+
+ /* translate to location of db file */
+ util_strlcpy(filename, udev_get_dev_path(udev), len);
+ start = util_strlcat(filename, "/.udev/db/", len);
+ util_strlcat(filename, devpath, len);
+ return util_path_encode(&filename[start], len - start);
+}
+
+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;
+
+ devpath_to_db_path(udev_device->udev, udev_device->devpath, filename, sizeof(filename));
+
+ if (lstat(filename, &stats) != 0) {
+ info(udev_device->udev, "no db file to read %s: %s\n", filename, strerror(errno));
+ 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));
+ 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)
+ return -ENOMEM;
+ return 0;
+ }
+
+ f = fopen(filename, "r");
+ if (f == NULL) {
+ info(udev_device->udev, "error reading db file %s: %s\n", filename, strerror(errno));
+ return -1;
+ }
+ while (fgets(line, sizeof(line), f)) {
+ ssize_t len;
+ const char *val;
+ unsigned int maj, min;
+
+ len = strlen(line);
+ if (len < 4)
+ break;
+ line[len-1] = '\0';
+ val = &line[2];
+
+ 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));
+ break;
+ case 'S':
+ util_strlcpy(filename, udev_get_dev_path(udev_device->udev), sizeof(filename));
+ util_strlcat(filename, "/", sizeof(filename));
+ util_strlcat(filename, val, sizeof(filename));
+ device_add_devlink(udev_device, filename);
+ break;
+ case 'L':
+ device_set_devlink_priority(udev_device, atoi(val));
+ break;
+ case 'T':
+ device_set_timeout(udev_device, atoi(val));
+ break;
+ case 'A':
+ device_set_num_fake_partitions(udev_device, atoi(val));
+ break;
+ case 'R':
+ device_set_ignore_remove(udev_device, atoi(val));
+ break;
+ case 'E':
+ device_add_property(udev_device, val);
+ break;
+ }
+ }
+ fclose(f);
+
+ return rc;
+}
+
+struct udev_device *device_init(struct udev *udev)
{
struct udev_device *udev_device;
+ if (udev == NULL)
+ return NULL;
+
udev_device = malloc(sizeof(struct udev_device));
if (udev_device == NULL)
return NULL;
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);
+ info(udev_device->udev, "udev_device: %p created\n", udev_device);
return udev_device;
}
**/
struct udev_device *udev_device_new_from_devpath(struct udev *udev, const char *devpath)
{
- char path[PATH_SIZE];
+ char path[UTIL_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)
+ if (udev == NULL)
return NULL;
- if (!S_ISDIR(statbuf.st_mode))
+ if (devpath == NULL)
return NULL;
+ util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
+ util_strlcat(path, devpath, sizeof(path));
+ util_strlcat(path, "/uevent", sizeof(path));
+ if (stat(path, &statbuf) != 0) {
+ info(udev, "not a device :%s\n", path);
+ return NULL;
+ }
+
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);
- return NULL;
- }
- log_info(udev, "device %p created\n", udev_device);
+ /* resolve possible symlink to real path */
+ util_strlcpy(path, devpath, sizeof(path));
+ util_resolve_sys_link(udev, path, sizeof(path));
+ device_set_devpath(udev_device, path);
+ info(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device));
- strlcpy(path, devpath, sizeof(path));
- sysfs_resolve_link(path, sizeof(path));
+ if (device_read_db(udev_device) >= 0)
+ info(udev, "device %p filled with udev database data\n", udev_device);
- 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;
}
+struct udev_device *udev_device_new_from_parent(struct udev_device *udev_device)
+{
+ struct udev_device *udev_device_parent = NULL;
+ char path[UTIL_PATH_SIZE];
+ char *pos;
+
+ if (udev_device == NULL)
+ return NULL;
+
+ util_strlcpy(path, udev_device_get_devpath(udev_device), sizeof(path));
+ while (1) {
+ pos = strrchr(path, '/');
+ if (pos == NULL)
+ break;
+ pos[0] = '\0';
+ udev_device_parent = udev_device_new_from_devpath(udev_device->udev, path);
+ if (udev_device_parent != NULL)
+ break;
+ }
+ return udev_device_parent;
+}
+
/**
* udev_device_get_udev:
+ * @udev_device: udev device
*
* Retrieve the udev library context the device was created with.
*
**/
struct udev *udev_device_get_udev(struct udev_device *udev_device)
{
+ if (udev_device == NULL)
+ return NULL;
return udev_device->udev;
}
**/
struct udev_device *udev_device_ref(struct udev_device *udev_device)
{
+ if (udev_device == NULL)
+ return NULL;
udev_device->refcount++;
return udev_device;
}
**/
void udev_device_unref(struct udev_device *udev_device)
{
+ if (udev_device == NULL)
+ return;
udev_device->refcount--;
if (udev_device->refcount > 0)
return;
- udev_device_cleanup(udev_device->udevice);
+ free(udev_device->syspath);
+ free(udev_device->devname);
+ 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);
+ free(udev_device->action);
+ free(udev_device->driver);
+ free(udev_device->devpath_old);
+ free(udev_device->physdevpath);
+ info(udev_device->udev, "udev_device: %p released\n", udev_device);
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.
+ * Retrieve the kernel devpath value of the udev device. The path
+ * does not contain the sys mount point, and starts with a '/'.
*
- * Returns: the sys path of the udev device
+ * Returns: the devpath of the udev device
**/
const char *udev_device_get_devpath(struct udev_device *udev_device)
{
- return udev_device->udevice->dev->devpath;
+ if (udev_device == NULL)
+ return NULL;
+ return udev_device->devpath;
+}
+
+/**
+ * udev_device_get_syspath:
+ * @udev_device: udev device
+ *
+ * Retrieve the sys path of the udev device. The path is an
+ * absolute path and starts with the sys mount point.
+ *
+ * Returns: the sys path of the udev device
+ **/
+const char *udev_device_get_syspath(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return NULL;
+ return udev_device->syspath;
+}
+
+const char *udev_device_get_sysname(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return NULL;
+ return udev_device->sysname;
}
/**
* @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 '/'.
+ * The path is an absolute path, and starts with the device directory.
*
* 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')
+ if (udev_device == NULL)
return NULL;
- return udev_device->udevice->name;
+ return udev_device->devname;
}
/**
**/
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 (util_get_sys_subsystem(udev_device->udev, dev->devpath,
- dev->subsystem, sizeof(dev->subsystem)) < 2)
+ char subsystem[UTIL_NAME_SIZE];
+
+ if (udev_device == NULL)
+ return NULL;
+ if (udev_device->subsystem != NULL)
+ return udev_device->subsystem;
+ if (util_get_sys_subsystem(udev_device->udev, udev_device->devpath, subsystem, sizeof(subsystem)) < 2)
return NULL;
- return dev->subsystem;
+ udev_device->subsystem = strdup(subsystem);
+ return udev_device->subsystem;
}
/**
*
* 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 '/'.
+ * 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.
*
* Returns: the number of device links passed to the caller, or a negative value on error
**/
int (*cb)(struct udev_device *udev_device, const char *value, void *data),
void *data)
{
- struct name_entry *name_loop;
+ struct util_name_entry *name_loop;
int count = 0;
- list_for_each_entry(name_loop, &udev_device->udevice->symlink_list, node) {
+ 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;
int (*cb)(struct udev_device *udev_device, const char *key, const char *value, void *data),
void *data)
{
- struct name_entry *name_loop;
+ struct util_name_entry *name_loop;
int count = 0;
- list_for_each_entry(name_loop, &udev_device->udevice->env_list, node) {
- char name[PATH_SIZE];
+ if (udev_device == NULL)
+ return -1;
+ list_for_each_entry(name_loop, &udev_device->env_list, node) {
+ char name[UTIL_NAME_SIZE];
char *val;
- strncpy(name, name_loop->name, PATH_SIZE);
- name[PATH_SIZE-1] = '\0';
+ strncpy(name, name_loop->name, sizeof(name));
val = strchr(name, '=');
if (val == NULL)
continue;
val[0] = '\0';
val = &val[1];
+ count++;
if (cb(udev_device, name, val, data) != 0)
break;
}
return count;
}
+
+const char *udev_device_get_driver(struct udev_device *udev_device)
+{
+ char driver[UTIL_NAME_SIZE];
+
+ if (udev_device == NULL)
+ return NULL;
+ if (udev_device->driver != NULL)
+ return udev_device->driver;
+ if (util_get_sys_driver(udev_device->udev, udev_device->devpath, driver, sizeof(driver)) < 2)
+ return NULL;
+ udev_device->driver = strdup(driver);
+ return udev_device->driver;
+}
+
+dev_t udev_device_get_devnum(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return makedev(0, 0);
+ return udev_device->devnum;
+}
+
+const char *udev_device_get_action(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return NULL;
+ return udev_device->action;
+}
+
+unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return 0;
+ return udev_device->seqnum;
+}
+
+int device_set_devpath(struct udev_device *udev_device, const char *devpath)
+{
+ if (asprintf(&udev_device->syspath, "%s%s", udev_get_sys_path(udev_device->udev), devpath) < 0)
+ return -ENOMEM;
+ udev_device->devpath = &udev_device->syspath[strlen(udev_get_sys_path(udev_device->udev))];
+ udev_device->sysname = strrchr(udev_device->syspath, '/');
+ if (udev_device->sysname != NULL)
+ udev_device->sysname = &udev_device->sysname[1];
+ return 0;
+}
+
+int device_set_subsystem(struct udev_device *udev_device, const char *subsystem)
+{
+ udev_device->subsystem = strdup(subsystem);
+ if (udev_device->subsystem == NULL)
+ return -1;
+ return 0;
+}
+
+int device_set_devname(struct udev_device *udev_device, const char *devname)
+{
+ udev_device->devname = strdup(devname);
+ if (udev_device->devname == 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, 0) == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+int device_add_property(struct udev_device *udev_device, const char *property)
+{
+ if (util_name_list_add(udev_device->udev, &udev_device->env_list, property, 0) == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+int device_set_action(struct udev_device *udev_device, const char *action)
+{
+ udev_device->action = strdup(action);
+ if (udev_device->action == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+int device_set_driver(struct udev_device *udev_device, const char *driver)
+{
+ udev_device->driver = strdup(driver);
+ if (udev_device->driver == 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;
+}
+
+int device_set_devpath_old(struct udev_device *udev_device, const char *devpath_old)
+{
+ udev_device->devpath_old = strdup(devpath_old);
+ if (udev_device->devpath_old == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+const char *device_get_physdevpath(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return NULL;
+ return udev_device->physdevpath;
+}
+
+int device_set_physdevpath(struct udev_device *udev_device, const char *physdevpath)
+{
+ udev_device->physdevpath = strdup(physdevpath);
+ if (udev_device->physdevpath == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+int device_get_timeout(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return -1;
+ return udev_device->timeout;
+}
+
+int device_set_timeout(struct udev_device *udev_device, int timeout)
+{
+ udev_device->timeout = timeout;
+ return 0;
+}
+
+int device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum)
+{
+ udev_device->seqnum = seqnum;
+ return 0;
+}
+
+int device_set_devnum(struct udev_device *udev_device, dev_t devnum)
+{
+ udev_device->devnum = devnum;
+ return 0;
+}
+
+int device_get_num_fake_partitions(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return -1;
+ return udev_device->num_fake_partitions;
+}
+
+int device_set_num_fake_partitions(struct udev_device *udev_device, int num)
+{
+ udev_device->num_fake_partitions = num;
+ return 0;
+}
+
+int device_get_devlink_priority(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return -1;
+ return udev_device->devlink_priority;
+}
+
+int device_set_devlink_priority(struct udev_device *udev_device, int prio)
+{
+ udev_device->devlink_priority = prio;
+ return 0;
+}
+
+int device_get_ignore_remove(struct udev_device *udev_device)
+{
+ if (udev_device == NULL)
+ return -1;
+ return udev_device->ignore_remove;
+}
+
+int device_set_ignore_remove(struct udev_device *udev_device, int ignore)
+{
+ udev_device->ignore_remove = ignore;
+ return 0;
+}
+
~ianmdlvl / elogind.git / blobdiff