1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2 .. c:namespace:: DTV.net 3 4 .. _NET_GET_IF: 5 6 **************** 7 ioctl NET_GET_IF 8 **************** 9 10 Name 11 ==== 12 13 NET_GET_IF - Read the configuration data of an interface created via - :ref:`NET_ADD_IF <net>`. 14 15 Synopsis 16 ======== 17 18 .. c:macro:: NET_GET_IF 19 20 ``int ioctl(int fd, NET_GET_IF, struct dvb_net_if *net_if)`` 21 22 Arguments 23 ========= 24 25 ``fd`` 26 File descriptor returned by :c:func:`open()`. 27 28 ``net_if`` 29 pointer to struct :c:type:`dvb_net_if` 30 31 Description 32 =========== 33 34 The NET_GET_IF ioctl uses the interface number given by the struct 35 :c:type:`dvb_net_if`::ifnum field and fills the content of 36 struct :c:type:`dvb_net_if` with the packet ID and 37 encapsulation type used on such interface. If the interface was not 38 created yet with :ref:`NET_ADD_IF <net>`, it will return -1 and fill 39 the ``errno`` with ``EINVAL`` error code. 40 41 Return Value 42 ============ 43 44 On success 0 is returned, and :c:type:`ca_slot_info` is filled. 45 46 On error -1 is returned, and the ``errno`` variable is set 47 appropriately. 48 49 The generic error codes are described at the 50 :ref:`Generic Error Codes <gen-errors>` chapter.
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.