NAME

       udev_device_has_tag, udev_device_get_devlinks_list_entry,
       udev_device_get_properties_list_entry, udev_device_get_tags_list_entry,
       udev_device_get_sysattr_list_entry, udev_device_get_property_value,
       udev_device_get_sysattr_value, udev_device_set_sysattr_value - Retrieve or set device
       attributes

SYNOPSIS

       #include <libudev.h>

       struct udev_list_entry
                                                                   *udev_device_get_devlinks_list_entry(struct udev_device *udev_device);

       struct udev_list_entry
                                                                     *udev_device_get_properties_list_entry(struct udev_device *udev_device);

       struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device);

       struct udev_list_entry
                                                                  *udev_device_get_sysattr_list_entry(struct udev_device *udev_device);

       const char *udev_device_get_property_value(struct udev_device *udev_device,
                                                  const char *key);

       int udev_device_has_tag(struct udev_device *udev_device, const char *tag);

       const char *udev_device_get_sysattr_value(struct udev_device *udev_device,
                                                 const char *sysattr);

       int udev_device_set_sysattr_value(struct udev_device *udev_device, const char *sysattr,
                                         const char *value);

RETURN VALUE

       On success, udev_device_get_devlinks_list_entry(),
       udev_device_get_properties_list_entry(), udev_device_get_tags_list_entry() and
       udev_device_get_sysattr_list_entry() return a pointer to the first entry of the retrieved
       list. If that list is empty, or if an error occurred, NULL is returned.

       On success, udev_device_get_property_value() and udev_device_get_sysattr_value() return a
       pointer to a constant string of the requested value. On error, NULL is returned.
       Attributes that may contain NUL bytes should not be retrieved with
       udev_device_get_sysattr_value(); instead, read them directly from the files within the
       device's syspath.

       On success, udev_device_set_sysattr_value() returns an integer greater than, or equal to,
       0. On failure, a negative error code is returned. Values that contain NUL bytes should not
       be set with this function; instead, write them directly to the files within the device's
       syspath.

       On success, udev_device_has_tag() returns 1 or 0, depending on whether the device has the
       given tag or not. On failure, a negative error code is returned.

SEE ALSO

       udev_new(3), udev_device_new_from_syspath(3), udev_device_get_syspath(3),
       udev_enumerate_new(3), udev_monitor_new_from_netlink(3), udev_list_entry(3), systemd(1),