1.. -*- coding: utf-8; mode: rst -*- 2 3.. _audio_fopen: 4 5======================= 6Digital TV audio open() 7======================= 8 9Name 10---- 11 12Digital TV audio open() 13 14.. attention:: This ioctl is deprecated 15 16Synopsis 17-------- 18 19.. c:function:: int open(const char *deviceName, int flags) 20 :name: dvb-audio-open 21 22 23Arguments 24--------- 25 26.. flat-table:: 27 :header-rows: 0 28 :stub-columns: 0 29 30 31 - .. row 1 32 33 - const char \*deviceName 34 35 - Name of specific audio device. 36 37 - .. row 2 38 39 - int flags 40 41 - A bit-wise OR of the following flags: 42 43 - .. row 3 44 45 - 46 - O_RDONLY read-only access 47 48 - .. row 4 49 50 - 51 - O_RDWR read/write access 52 53 - .. row 5 54 55 - 56 - O_NONBLOCK open in non-blocking mode 57 58 - .. row 6 59 60 - 61 - (blocking mode is the default) 62 63 64Description 65----------- 66 67This system call opens a named audio device (e.g. 68/dev/dvb/adapter0/audio0) for subsequent use. When an open() call has 69succeeded, the device will be ready for use. The significance of 70blocking or non-blocking mode is described in the documentation for 71functions where there is a difference. It does not affect the semantics 72of the open() call itself. A device opened in blocking mode can later be 73put into non-blocking mode (and vice versa) using the F_SETFL command 74of the fcntl system call. This is a standard system call, documented in 75the Linux manual page for fcntl. Only one user can open the Audio Device 76in O_RDWR mode. All other attempts to open the device in this mode will 77fail, and an error code will be returned. If the Audio Device is opened 78in O_RDONLY mode, the only ioctl call that can be used is 79AUDIO_GET_STATUS. All other call will return with an error code. 80 81 82Return Value 83------------ 84 85.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| 86 87.. flat-table:: 88 :header-rows: 0 89 :stub-columns: 0 90 91 92 - .. row 1 93 94 - ``ENODEV`` 95 96 - Device driver not loaded/available. 97 98 - .. row 2 99 100 - ``EBUSY`` 101 102 - Device or resource busy. 103 104 - .. row 3 105 106 - ``EINVAL`` 107 108 - Invalid argument. 109