explain_shmctl_or_die(3) Library Functions Manual explain_shmctl_or_die(3)
NAME
explain_shmctl_or_die - shared memory control and report errors
SYNOPSIS
#include <libexplain/shmctl.h>
void explain_shmctl_or_die(int shmid, int command, struct shmid_ds *data);
int explain_shmctl_on_error(int shmid, int command, struct shmid_ds *data);
DESCRIPTION
The explain_shmctl_or_die function is used to call the shmctl(2) system call. On failure an explanation will be printed to stderr, obtained
from the explain_shmctl(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_shmctl_on_error function is used to call the shmctl(2) system call. On failure an explanation will be printed to stderr,
obtained from the explain_shmctl(3) function, but still returns to the caller.
shmid The shmid, exactly as to be passed to the shmctl(2) system call.
command The command, exactly as to be passed to the shmctl(2) system call.
data The data, exactly as to be passed to the shmctl(2) system call.
RETURN VALUE
The explain_shmctl_or_die function only returns on success, see shmctl(2) for more information. On failure, prints an explanation and
exits, it does not return.
The explain_shmctl_on_error function always returns the value return by the wrapped shmctl(2) system call.
EXAMPLE
The explain_shmctl_or_die function is intended to be used in a fashion similar to the following example:
explain_shmctl_or_die(shmid, command, data);
SEE ALSO
shmctl(2)
shared memory control
explain_shmctl(3)
explain shmctl(2) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2011 Peter Miller
explain_shmctl_or_die(3)