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)
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explain_ioctl_or_die(3) Library Functions Manual explain_ioctl_or_die(3)NAME
explain_ioctl_or_die - control device and report errors
SYNOPSIS
#include <libexplain/ioctl.h>
int explain_ioctl_or_die(int fildes, int request, void *data);
DESCRIPTION
The explain_ioctl_or_die function is used to call the ioctl(2) system call. On failure an explanation will be printed to stderr, obtained
from explain_ioctl(3), and then the process terminates by calling exit(EXIT_FAILURE).
This function is intended to be used in a fashion similar to the following example:
int result = explain_ioctl_or_die(fildes, request, data);
fildes The fildes, exactly as to be passed to the ioctl(2) system call.
request The request, exactly as to be passed to the ioctl(2) system call.
data The data, exactly as to be passed to the ioctl(2) system call.
Returns:
This function only returns on success, see ioctl(2) for more information. On failure, prints an explanation and exit()s.
SEE ALSO ioctl(2)
control device
explain_ioctl(3)
explain ioctl(2) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2008 Peter Miller
explain_ioctl_or_die(3)
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