#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
+#include <stdarg.h>
#include <unistd.h>
#include <errno.h>
#include <string.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 udev_log(struct udev *udev,
int priority, const char *file, int line, const char *fn,
const char *format, ...)
}
#endif
-static ssize_t get_subsystem(struct udev *udev, const char *devpath, char *subsystem, size_t size)
-{
- 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);
-}
-
/**
* udev_new:
*
**/
struct udev *udev_ref(struct udev *udev)
{
+ if (udev == NULL)
+ return NULL;
udev->refcount++;
return udev;
}
**/
void udev_unref(struct udev *udev)
{
+ if (udev == NULL)
+ return;
udev->refcount--;
if (udev->refcount > 0)
return;
**/
const char *udev_get_sys_path(struct udev *udev)
{
+ if (udev == NULL)
+ return NULL;
return sysfs_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)
- return NULL;
- memset(udev_device, 0x00, sizeof(struct udev_device));
- udev_device->refcount = 1;
- udev_device->udev = udev;
- return udev_device;
-}
-
-/**
- * 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)
-{
- 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;
-
- 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);
-
- 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;
-}
-
-/**
- * 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)
-{
- 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)
+ if (udev == NULL)
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_root;
}
~ianmdlvl / elogind.git / blobdiff