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   udev_device_get_action    ( 3 )

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Имя (Name)

udev_device_get_syspath, udev_device_get_sysname,
       udev_device_get_sysnum, udev_device_get_devpath,
       udev_device_get_devnode, udev_device_get_devnum,
       udev_device_get_devtype, udev_device_get_subsystem,
       udev_device_get_driver, udev_device_get_udev,
       udev_device_get_parent,
       udev_device_get_parent_with_subsystem_devtype,
       udev_device_get_is_initialized, udev_device_get_action - Query
       device properties

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Синопсис (Synopsis)

#include <libudev.h>

       const char
                                           *udev_device_get_syspath(struct udev_device *udev_device);

       const char
                                           *udev_device_get_sysname(struct udev_device *udev_device);

       const char
                                          *udev_device_get_sysnum(struct udev_device *udev_device);

       const char
                                           *udev_device_get_devpath(struct udev_device *udev_device);

       const char
                                           *udev_device_get_devnode(struct udev_device *udev_device);

       dev_t udev_device_get_devnum(struct udev_device *udev_device);

       const char
                                           *udev_device_get_devtype(struct udev_device *udev_device);

       const char
                                             *udev_device_get_subsystem(struct udev_device *udev_device);

       const char
                                          *udev_device_get_driver(struct udev_device *udev_device);

       struct udev
                                         *udev_device_get_udev(struct udev_device *udev_device);

       struct udev_device
                                                  *udev_device_get_parent(struct udev_device *udev_device);

       struct udev_device
                                                                         *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device,
                                                                         const char *subsystem,
                                                                         const char *devtype);

       int
                                          udev_device_get_is_initialized(struct udev_device *udev_device);

       const char
                                          *udev_device_get_action(struct udev_device *udev_device);

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Возвращаемое значение (Return value)

On success, udev_device_get_syspath(), udev_device_get_sysname(),
       udev_device_get_sysnum(), udev_device_get_devpath(),
       udev_device_get_devnode(), udev_device_get_devtype(),
       udev_device_get_subsystem(), udev_device_get_driver() and
       udev_device_get_action() return a pointer to a constant string
       that describes the requested property. The lifetime of this
       string is bound to the device it was requested on. On failure,
       each function may return NULL.

       On success, udev_device_get_devnum() returns the device type of
       the passed device. On failure, a device type with minor and major
       number set to 0 is returned.

       udev_device_get_udev() always returns a valid pointer to the udev
       context that this device belongs to.

       On success, udev_device_get_parent() and
       udev_device_get_parent_with_subsystem_devtype() return a pointer
       to the parent device. No additional reference to this device is
       acquired, but the child device owns a reference to such a parent
       device. On failure, NULL is returned.

       On success, udev_device_get_is_initialized() returns either 1 or
       0, depending on whether the passed device has already been
       initialized by udev or not. On failure, a negative error code is
       returned. Note that devices for which no udev rules are defined
       are never reported initialized.

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Смотри также (See also)

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

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