void explain_flock_or_die(int fildes, int command);
int explain_flock_on_error(int fildes, int command))
DESCRIPTION
The explain_flock_or_die function is used to call the
flock(2) system call. On failure an explanation will be printed to
stderr, obtained from the explain_flock(3) function, and
then the process terminates by calling exit(EXIT_FAILURE).
The explain_flock_on_error function is used to call the
flock(2) system call. On failure an explanation will be printed to
stderr, obtained from the explain_flock(3) function, but
still returns to the caller.
fildes
The fildes, exactly as to be passed to the flock(2) system call.
command
The command, exactly as to be passed to the flock(2) system call.
RETURN VALUE
The explain_flock_or_die function only returns on success, see
flock(2) for more information. On failure, prints an explanation
and exits, it does not return.
The explain_flock_on_error function always returns the value return
by the wrapped flock(2) system call.
EXAMPLE
The explain_flock_or_die function is intended to be used in a
fashion similar to the following example: