+++ /dev/null
-/***
- This file is part of systemd.
-
- Copyright 2008-2012 Kay Sievers <kay@vrfy.org>
- Copyright 2015 Tom Gundersen <teg@jklm.no>
-
- systemd 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.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stddef.h>
-#include <unistd.h>
-#include <stdbool.h>
-#include <errno.h>
-#include <string.h>
-#include <dirent.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <net/if.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <linux/sockios.h>
-
-#include "sd-device.h"
-#include "device-util.h"
-#include "device-private.h"
-
-#include "libudev.h"
-#include "libudev-private.h"
-#include "libudev-device-internal.h"
-
-/**
- * SECTION:libudev-device
- * @short_description: kernel sys devices
- *
- * Representation of kernel sys devices. Devices are uniquely identified
- * by their syspath, every device has exactly one path in the kernel sys
- * filesystem. Devices usually belong to a kernel subsystem, and have
- * a unique name inside that subsystem.
- */
-
-/**
- * udev_device_get_seqnum:
- * @udev_device: udev device
- *
- * This is only valid if the device was received through a monitor. Devices read from
- * sys do not have a sequence number.
- *
- * Returns: the kernel event sequence number, or 0 if there is no sequence number available.
- **/
-_public_ unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device)
-{
- const char *seqnum;
- unsigned long long ret;
- int r;
-
- assert_return_errno(udev_device, 0, EINVAL);
-
- r = sd_device_get_property_value(udev_device->device, "SEQNUM", &seqnum);
- if (r == -ENOENT)
- return 0;
- else if (r < 0) {
- errno = -r;
- return 0;
- }
-
- r = safe_atollu(seqnum, &ret);
- if (r < 0) {
- errno = -r;
- return 0;
- }
-
- return ret;
-}
-
-/**
- * udev_device_get_devnum:
- * @udev_device: udev device
- *
- * Get the device major/minor number.
- *
- * Returns: the dev_t number.
- **/
-_public_ dev_t udev_device_get_devnum(struct udev_device *udev_device)
-{
- dev_t devnum;
- int r;
-
- assert_return_errno(udev_device, makedev(0, 0), EINVAL);
-
- r = sd_device_get_devnum(udev_device->device, &devnum);
- if (r < 0) {
- errno = -r;
- return makedev(0, 0);
- }
-
- return devnum;
-}
-
-/**
- * udev_device_get_driver:
- * @udev_device: udev device
- *
- * Get the kernel driver name.
- *
- * Returns: the driver name string, or #NULL if there is no driver attached.
- **/
-_public_ const char *udev_device_get_driver(struct udev_device *udev_device)
-{
- const char *driver;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- r = sd_device_get_driver(udev_device->device, &driver);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- return driver;
-}
-
-/**
- * udev_device_get_devtype:
- * @udev_device: udev device
- *
- * Retrieve the devtype string of the udev device.
- *
- * Returns: the devtype name of the udev device, or #NULL if it can not be determined
- **/
-_public_ const char *udev_device_get_devtype(struct udev_device *udev_device)
-{
- const char *devtype;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- r = sd_device_get_devtype(udev_device->device, &devtype);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- return devtype;
-}
-
-/**
- * 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
- **/
-_public_ const char *udev_device_get_subsystem(struct udev_device *udev_device)
-{
- const char *subsystem;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- r = sd_device_get_subsystem(udev_device->device, &subsystem);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- return subsystem;
-}
-
-/**
- * udev_device_get_property_value:
- * @udev_device: udev device
- * @key: property name
- *
- * Get the value of a given property.
- *
- * Returns: the property string, or #NULL if there is no such property.
- **/
-_public_ const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key)
-{
- const char *value = NULL;
- int r;
-
- assert_return_errno(udev_device && key, NULL, EINVAL);
-
- r = sd_device_get_property_value(udev_device->device, key, &value);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- return value;
-}
-
-struct udev_device *udev_device_new(struct udev *udev) {
- struct udev_device *udev_device;
-
- assert_return_errno(udev, NULL, EINVAL);
-
- udev_device = new0(struct udev_device, 1);
- if (!udev_device) {
- errno = ENOMEM;
- return NULL;
- }
- udev_device->refcount = 1;
- udev_device->udev = udev;
- udev_list_init(udev, &udev_device->properties, true);
- udev_list_init(udev, &udev_device->tags, true);
- udev_list_init(udev, &udev_device->sysattrs, true);
- udev_list_init(udev, &udev_device->devlinks, true);
-
- return udev_device;
-}
-
-/**
- * udev_device_new_from_syspath:
- * @udev: udev library context
- * @syspath: sys device path including sys directory
- *
- * Create new udev device, and fill in information from the sys
- * device and the udev database entry. The syspath is the absolute
- * path to the device, including the sys mount point.
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the resources of the udev device.
- *
- * Returns: a new udev device, or #NULL, if it does not exist
- **/
-_public_ struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath) {
- struct udev_device *udev_device;
- int r;
-
- udev_device = udev_device_new(udev);
- if (!udev_device)
- return NULL;
-
- r = sd_device_new_from_syspath(&udev_device->device, syspath);
- if (r < 0) {
- errno = -r;
- udev_device_unref(udev_device);
- return NULL;
- }
-
- return udev_device;
-}
-
-/**
- * udev_device_new_from_devnum:
- * @udev: udev library context
- * @type: char or block device
- * @devnum: device major/minor number
- *
- * Create new udev device, and fill in information from the sys
- * device and the udev database entry. The device is looked-up
- * by its major/minor number and type. Character and block device
- * numbers are not unique across the two types.
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the resources of the udev device.
- *
- * Returns: a new udev device, or #NULL, if it does not exist
- **/
-_public_ struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum)
-{
- struct udev_device *udev_device;
- int r;
-
- udev_device = udev_device_new(udev);
- if (!udev_device)
- return NULL;
-
- r = sd_device_new_from_devnum(&udev_device->device, type, devnum);
- if (r < 0) {
- errno = -r;
- udev_device_unref(udev_device);
- return NULL;
- }
-
- return udev_device;
-}
-
-/**
- * udev_device_new_from_device_id:
- * @udev: udev library context
- * @id: text string identifying a kernel device
- *
- * Create new udev device, and fill in information from the sys
- * device and the udev database entry. The device is looked-up
- * by a special string:
- * b8:2 - block device major:minor
- * c128:1 - char device major:minor
- * n3 - network device ifindex
- * +sound:card29 - kernel driver core subsystem:device name
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the resources of the udev device.
- *
- * Returns: a new udev device, or #NULL, if it does not exist
- **/
-_public_ struct udev_device *udev_device_new_from_device_id(struct udev *udev, const char *id)
-{
- struct udev_device *udev_device;
- int r;
-
- udev_device = udev_device_new(udev);
- if (!udev_device)
- return NULL;
-
- r = sd_device_new_from_device_id(&udev_device->device, id);
- if (r < 0) {
- errno = -r;
- udev_device_unref(udev_device);
- return NULL;
- }
-
- return udev_device;
-}
-
-/**
- * udev_device_new_from_subsystem_sysname:
- * @udev: udev library context
- * @subsystem: the subsystem of the device
- * @sysname: the name of the device
- *
- * Create new udev device, and fill in information from the sys device
- * and the udev database entry. The device is looked up by the subsystem
- * and name string of the device, like "mem" / "zero", or "block" / "sda".
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the resources of the udev device.
- *
- * Returns: a new udev device, or #NULL, if it does not exist
- **/
-_public_ struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname)
-{
- struct udev_device *udev_device;
- int r;
-
- udev_device = udev_device_new(udev);
- if (!udev_device)
- return NULL;
-
- r = sd_device_new_from_subsystem_sysname(&udev_device->device, subsystem, sysname);
- if (r < 0) {
- errno = -r;
- udev_device_unref(udev_device);
- return NULL;
- }
-
- return udev_device;
-}
-
-/**
- * udev_device_new_from_environment
- * @udev: udev library context
- *
- * Create new udev device, and fill in information from the
- * current process environment. This only works reliable if
- * the process is called from a udev rule. It is usually used
- * for tools executed from IMPORT= rules.
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the resources of the udev device.
- *
- * Returns: a new udev device, or #NULL, if it does not exist
- **/
-_public_ struct udev_device *udev_device_new_from_environment(struct udev *udev)
-{
- struct udev_device *udev_device;
- int r;
-
- udev_device = udev_device_new(udev);
- if (!udev_device)
- return NULL;
-
- r = device_new_from_strv(&udev_device->device, environ);
- if (r < 0) {
- errno = -r;
- udev_device_unref(udev_device);
- return NULL;
- }
-
- return udev_device;
-}
-
-static struct udev_device *device_new_from_parent(struct udev_device *child)
-{
- struct udev_device *parent;
- int r;
-
- assert_return_errno(child, NULL, EINVAL);
-
- parent = udev_device_new(child->udev);
- if (!parent)
- return NULL;
-
- r = sd_device_get_parent(child->device, &parent->device);
- if (r < 0) {
- errno = -r;
- udev_device_unref(parent);
- return NULL;
- }
-
- /* the parent is unref'ed with the child, so take a ref from libudev as well */
- sd_device_ref(parent->device);
-
- return parent;
-}
-
-/**
- * udev_device_get_parent:
- * @udev_device: the device to start searching from
- *
- * Find the next parent device, and fill in information from the sys
- * device and the udev database entry.
- *
- * Returned device is not referenced. It is attached to the child
- * device, and will be cleaned up when the child device is cleaned up.
- *
- * It is not necessarily just the upper level directory, empty or not
- * recognized sys directories are ignored.
- *
- * It can be called as many times as needed, without caring about
- * references.
- *
- * Returns: a new udev device, or #NULL, if it no parent exist.
- **/
-_public_ struct udev_device *udev_device_get_parent(struct udev_device *udev_device)
-{
- assert_return_errno(udev_device, NULL, EINVAL);
-
- if (!udev_device->parent_set) {
- udev_device->parent_set = true;
- udev_device->parent = device_new_from_parent(udev_device);
- }
-
- /* TODO: errno will differ here in case parent == NULL */
- return udev_device->parent;
-}
-
-/**
- * udev_device_get_parent_with_subsystem_devtype:
- * @udev_device: udev device to start searching from
- * @subsystem: the subsystem of the device
- * @devtype: the type (DEVTYPE) of the device
- *
- * Find the next parent device, with a matching subsystem and devtype
- * value, and fill in information from the sys device and the udev
- * database entry.
- *
- * If devtype is #NULL, only subsystem is checked, and any devtype will
- * match.
- *
- * Returned device is not referenced. It is attached to the child
- * device, and will be cleaned up when the child device is cleaned up.
- *
- * It can be called as many times as needed, without caring about
- * references.
- *
- * Returns: a new udev device, or #NULL if no matching parent exists.
- **/
-_public_ struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype)
-{
- sd_device *parent;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- /* this relies on the fact that finding the subdevice of a parent or the
- parent of a subdevice commute */
-
- /* first find the correct sd_device */
- r = sd_device_get_parent_with_subsystem_devtype(udev_device->device, subsystem, devtype, &parent);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- /* then walk the chain of udev_device parents until the correspanding
- one is found */
- while ((udev_device = udev_device_get_parent(udev_device))) {
- if (udev_device->device == parent)
- return udev_device;
- }
-
- errno = ENOENT;
- return NULL;
-}
-
-/**
- * udev_device_get_udev:
- * @udev_device: udev device
- *
- * Retrieve the udev library context the device was created with.
- *
- * Returns: the udev library context
- **/
-_public_ struct udev *udev_device_get_udev(struct udev_device *udev_device)
-{
- assert_return_errno(udev_device, NULL, EINVAL);
-
- return udev_device->udev;
-}
-
-/**
- * udev_device_ref:
- * @udev_device: udev device
- *
- * Take a reference of a udev device.
- *
- * Returns: the passed udev device
- **/
-_public_ struct udev_device *udev_device_ref(struct udev_device *udev_device)
-{
- if (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 resources of the device will be released.
- *
- * Returns: #NULL
- **/
-_public_ struct udev_device *udev_device_unref(struct udev_device *udev_device)
-{
- if (udev_device && (-- udev_device->refcount) == 0) {
- sd_device_unref(udev_device->device);
- udev_device_unref(udev_device->parent);
-
- udev_list_cleanup(&udev_device->properties);
- udev_list_cleanup(&udev_device->sysattrs);
- udev_list_cleanup(&udev_device->tags);
- udev_list_cleanup(&udev_device->devlinks);
-
- free(udev_device);
- }
-
- return NULL;
-}
-
-/**
- * udev_device_get_devpath:
- * @udev_device: udev device
- *
- * Retrieve the kernel devpath value of the udev device. The path
- * does not contain the sys mount point, and starts with a '/'.
- *
- * Returns: the devpath of the udev device
- **/
-_public_ const char *udev_device_get_devpath(struct udev_device *udev_device)
-{
- const char *devpath;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- r = sd_device_get_devpath(udev_device->device, &devpath);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- return 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
- **/
-_public_ const char *udev_device_get_syspath(struct udev_device *udev_device)
-{
- const char *syspath;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- r = sd_device_get_syspath(udev_device->device, &syspath);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- return syspath;
-}
-
-/**
- * udev_device_get_sysname:
- * @udev_device: udev device
- *
- * Get the kernel device name in /sys.
- *
- * Returns: the name string of the device device
- **/
-_public_ const char *udev_device_get_sysname(struct udev_device *udev_device)
-{
- const char *sysname;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- r = sd_device_get_sysname(udev_device->device, &sysname);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- return sysname;
-}
-
-/**
- * udev_device_get_sysnum:
- * @udev_device: udev device
- *
- * Get the instance number of the device.
- *
- * Returns: the trailing number string of the device name
- **/
-_public_ const char *udev_device_get_sysnum(struct udev_device *udev_device)
-{
- const char *sysnum;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- r = sd_device_get_sysnum(udev_device->device, &sysnum);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- return sysnum;
-}
-
-/**
- * udev_device_get_devnode:
- * @udev_device: udev device
- *
- * Retrieve the device node file name belonging to the udev device.
- * 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
- **/
-_public_ const char *udev_device_get_devnode(struct udev_device *udev_device)
-{
- const char *devnode;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- r = sd_device_get_devname(udev_device->device, &devnode);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- return devnode;
-}
-
-/**
- * udev_device_get_devlinks_list_entry:
- * @udev_device: udev device
- *
- * Retrieve the list of device links pointing to the device file of
- * the udev device. The next list entry can be retrieved with
- * udev_list_entry_get_next(), which returns #NULL if no more entries exist.
- * The devlink path can be retrieved from the list entry by
- * udev_list_entry_get_name(). The path is an absolute path, and starts with
- * the device directory.
- *
- * Returns: the first entry of the device node link list
- **/
-_public_ struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device)
-{
- assert_return_errno(udev_device, NULL, EINVAL);
-
- if (device_get_devlinks_generation(udev_device->device) != udev_device->devlinks_generation) {
- const char *devlink;
-
- udev_list_cleanup(&udev_device->devlinks);
-
- FOREACH_DEVICE_DEVLINK(udev_device->device, devlink)
- udev_list_entry_add(&udev_device->devlinks, devlink, NULL);
-
- udev_device->devlinks_generation = device_get_devlinks_generation(udev_device->device);
- }
-
- return udev_list_get_entry(&udev_device->devlinks);
-}
-
-/**
- * udev_device_get_event_properties_entry:
- * @udev_device: udev device
- *
- * Retrieve the list of key/value device properties of the udev
- * device. The next list entry can be retrieved with udev_list_entry_get_next(),
- * which returns #NULL if no more entries exist. The property name
- * can be retrieved from the list entry by udev_list_entry_get_name(),
- * the property value by udev_list_entry_get_value().
- *
- * Returns: the first entry of the property list
- **/
-_public_ struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device)
-{
- assert_return_errno(udev_device, NULL, EINVAL);
-
- if (device_get_properties_generation(udev_device->device) != udev_device->properties_generation) {
- const char *key, *value;
-
- udev_list_cleanup(&udev_device->properties);
-
- FOREACH_DEVICE_PROPERTY(udev_device->device, key, value)
- udev_list_entry_add(&udev_device->properties, key, value);
-
- udev_device->properties_generation = device_get_properties_generation(udev_device->device);
- }
-
- return udev_list_get_entry(&udev_device->properties);
-}
-
-/**
- * udev_device_get_action:
- * @udev_device: udev device
- *
- * This is only valid if the device was received through a monitor. Devices read from
- * sys do not have an action string. Usual actions are: add, remove, change, online,
- * offline.
- *
- * Returns: the kernel action value, or #NULL if there is no action value available.
- **/
-_public_ const char *udev_device_get_action(struct udev_device *udev_device) {
- const char *action = NULL;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- r = sd_device_get_property_value(udev_device->device, "ACTION", &action);
- if (r < 0 && r != -ENOENT) {
- errno = -r;
- return NULL;
- }
-
- return action;
-}
-
-/**
- * udev_device_get_usec_since_initialized:
- * @udev_device: udev device
- *
- * Return the number of microseconds passed since udev set up the
- * device for the first time.
- *
- * This is only implemented for devices with need to store properties
- * in the udev database. All other devices return 0 here.
- *
- * Returns: the number of microseconds since the device was first seen.
- **/
-_public_ unsigned long long int udev_device_get_usec_since_initialized(struct udev_device *udev_device)
-{
- usec_t ts;
- int r;
-
- assert_return(udev_device, -EINVAL);
-
- r = sd_device_get_usec_since_initialized(udev_device->device, &ts);
- if (r < 0) {
- errno = EINVAL;
- return 0;
- }
-
- return ts;
-}
-
-/**
- * udev_device_get_sysattr_value:
- * @udev_device: udev device
- * @sysattr: attribute name
- *
- * The retrieved value is cached in the device. Repeated calls will return the same
- * value and not open the attribute again.
- *
- * Returns: the content of a sys attribute file, or #NULL if there is no sys attribute value.
- **/
-_public_ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr)
-{
- const char *value;
- int r;
-
- assert_return_errno(udev_device, NULL, EINVAL);
-
- r = sd_device_get_sysattr_value(udev_device->device, sysattr, &value);
- if (r < 0) {
- errno = -r;
- return NULL;
- }
-
- return value;
-}
-
-/**
- * udev_device_set_sysattr_value:
- * @udev_device: udev device
- * @sysattr: attribute name
- * @value: new value to be set
- *
- * Update the contents of the sys attribute and the cached value of the device.
- *
- * Returns: Negative error code on failure or 0 on success.
- **/
-_public_ int udev_device_set_sysattr_value(struct udev_device *udev_device, const char *sysattr, char *value)
-{
- int r;
-
- assert_return(udev_device, -EINVAL);
-
- r = sd_device_set_sysattr_value(udev_device->device, sysattr, value);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-/**
- * udev_device_get_sysattr_list_entry:
- * @udev_device: udev device
- *
- * Retrieve the list of available sysattrs, with value being empty;
- * This just return all available sysfs attributes for a particular
- * device without reading their values.
- *
- * Returns: the first entry of the property list
- **/
-_public_ struct udev_list_entry *udev_device_get_sysattr_list_entry(struct udev_device *udev_device)
-{
- assert_return_errno(udev_device, NULL, EINVAL);
-
- if (!udev_device->sysattrs_read) {
- const char *sysattr;
-
- udev_list_cleanup(&udev_device->sysattrs);
-
- FOREACH_DEVICE_SYSATTR(udev_device->device, sysattr)
- udev_list_entry_add(&udev_device->properties, sysattr, NULL);
-
- udev_device->sysattrs_read = true;
- }
-
- return udev_list_get_entry(&udev_device->sysattrs);
-}
-
-/**
- * udev_device_get_is_initialized:
- * @udev_device: udev device
- *
- * Check if udev has already handled the device and has set up
- * device node permissions and context, or has renamed a network
- * device.
- *
- * This is only implemented for devices with a device node
- * or network interfaces. All other devices return 1 here.
- *
- * Returns: 1 if the device is set up. 0 otherwise.
- **/
-_public_ int udev_device_get_is_initialized(struct udev_device *udev_device)
-{
- int r, initialized;
-
- assert_return(udev_device, -EINVAL);
-
- r = sd_device_get_is_initialized(udev_device->device, &initialized);
- if (r < 0) {
- errno = -r;
-
- return 0;
- }
-
- return initialized;
-}
-
-/**
- * udev_device_get_tags_list_entry:
- * @udev_device: udev device
- *
- * Retrieve the list of tags attached to the udev device. The next
- * list entry can be retrieved with udev_list_entry_get_next(),
- * which returns #NULL if no more entries exist. The tag string
- * can be retrieved from the list entry by udev_list_entry_get_name().
- *
- * Returns: the first entry of the tag list
- **/
-_public_ struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device)
-{
- assert_return_errno(udev_device, NULL, EINVAL);
-
- if (device_get_tags_generation(udev_device->device) != udev_device->tags_generation) {
- const char *tag;
-
- udev_list_cleanup(&udev_device->tags);
-
- FOREACH_DEVICE_TAG(udev_device->device, tag)
- udev_list_entry_add(&udev_device->tags, tag, NULL);
-
- udev_device->tags_generation = device_get_tags_generation(udev_device->device);
- }
-
- return udev_list_get_entry(&udev_device->tags);
-}
-
-/**
- * udev_device_has_tag:
- * @udev_device: udev device
- * @tag: tag name
- *
- * Check if a given device has a certain tag associated.
- *
- * Returns: 1 if the tag is found. 0 otherwise.
- **/
-_public_ int udev_device_has_tag(struct udev_device *udev_device, const char *tag)
-{
- assert_return(udev_device, 0);
-
- return sd_device_has_tag(udev_device->device, tag);
-}
~ianmdlvl / elogind.git / blobdiff