snd_pcm_lib_ioctl(9) centos man page | unix.com

SND_PCM_LIB_IOCTL(9)						      PCM API						      SND_PCM_LIB_IOCTL(9)

NAME
       snd_pcm_lib_ioctl - a generic PCM ioctl callback

SYNOPSIS
       int snd_pcm_lib_ioctl(struct snd_pcm_substream * substream, unsigned int cmd, void * arg);

ARGUMENTS
       substream
	   the pcm substream instance

       cmd
	   ioctl command

       arg
	   ioctl argument

DESCRIPTION
       Processes the generic ioctl commands for PCM. Can be passed as the ioctl callback for PCM ops.

RETURN
       Zero if successful, or a negative error code on failure.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						      SND_PCM_LIB_IOCTL(9)