1*4882a593Smuzhiyun.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2*4882a593Smuzhiyun.. c:namespace:: DTV.ca 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun.. _CA_SET_DESCR: 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun============ 7*4882a593SmuzhiyunCA_SET_DESCR 8*4882a593Smuzhiyun============ 9*4882a593Smuzhiyun 10*4882a593SmuzhiyunName 11*4882a593Smuzhiyun---- 12*4882a593Smuzhiyun 13*4882a593SmuzhiyunCA_SET_DESCR 14*4882a593Smuzhiyun 15*4882a593SmuzhiyunSynopsis 16*4882a593Smuzhiyun-------- 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun.. c:macro:: CA_SET_DESCR 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun``int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc)`` 21*4882a593Smuzhiyun 22*4882a593SmuzhiyunArguments 23*4882a593Smuzhiyun--------- 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun``fd`` 26*4882a593Smuzhiyun File descriptor returned by a previous call to :c:func:`open()`. 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun``msg`` 29*4882a593Smuzhiyun Pointer to struct :c:type:`ca_descr`. 30*4882a593Smuzhiyun 31*4882a593SmuzhiyunDescription 32*4882a593Smuzhiyun----------- 33*4882a593Smuzhiyun 34*4882a593SmuzhiyunCA_SET_DESCR is used for feeding descrambler CA slots with descrambling 35*4882a593Smuzhiyunkeys (referred as control words). 36*4882a593Smuzhiyun 37*4882a593SmuzhiyunReturn Value 38*4882a593Smuzhiyun------------ 39*4882a593Smuzhiyun 40*4882a593SmuzhiyunOn success 0 is returned. 41*4882a593Smuzhiyun 42*4882a593SmuzhiyunOn error -1 is returned, and the ``errno`` variable is set 43*4882a593Smuzhiyunappropriately. 44*4882a593Smuzhiyun 45*4882a593SmuzhiyunGeneric error codes are described at the 46*4882a593Smuzhiyun:ref:`Generic Error Codes <gen-errors>` chapter. 47