NAME
explain_pwrite_or_die - seek and write to a file descriptor and report
errors
SYNOPSIS
#include <libexplain/pwrite.h>
ssize_t explain_pwrite_or_die(int fildes, const void *data, size_t
data_size, off_t offset);
ssize_t explain_pwrite_on_error(int fildes, const void *data, size_t
data_size, off_t offset))
DESCRIPTION
The explain_pwrite_or_die function is used to call the pwrite(2) system
call. On failure an explanation will be printed to stderr, obtained
from the explain_pwrite(3) function, and then the process terminates by
calling exit(EXIT_FAILURE).
The explain_pwrite_on_error function is used to call the pwrite(2)
system call. On failure an explanation will be printed to stderr,
obtained from the explain_pwrite(3) function, but still returns to the
caller.
fildes The fildes, exactly as to be passed to the pwrite(2) system
call.
data The data, exactly as to be passed to the pwrite(2) system call.
data_size
The data_size, exactly as to be passed to the pwrite(2) system
call.
offset The offset, exactly as to be passed to the pwrite(2) system
call.
RETURN VALUE
The explain_pwrite_or_die function only returns on success, see
pwrite(2) for more information. On failure, prints an explanation and
exits, it does not return.
The explain_pwrite_on_error function always returns the value return by
the wrapped pwrite(2) system call.
EXAMPLE
The explain_pwrite_or_die function is intended to be used in a fashion
similar to the following example:
ssize_t result = explain_pwrite_or_die(fildes, data, data_size, offset);
SEE ALSO
pwrite(2)
read from or write to a file descriptor at a given offset
explain_pwrite(3)
explain pwrite(2) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.19
Copyright (C) 2009 Peter Miller
explain_pwrite_or_die(3)