NAME
assert_perror - test errnum and abort
SYNOPSIS
#define _GNU_SOURCE
#include <assert.h>
void assert_perror(int errnum);
DESCRIPTION
If the macro NDEBUG was defined at the moment <assert.h> was last
included, the macro assert_perror() generates no code, and hence does
nothing at all. Otherwise, the macro assert_perror() prints an error
message to standard error and terminates the program by calling
abort(3) if errnum is nonzero. The message contains the filename,
function name and line number of the macro call, and the output of
strerror(errnum).
RETURN VALUE
No value is returned.
CONFORMING TO
This is a GNU extension.
BUGS
The purpose of the assert macros is to help the programmer find bugs in
his program, things that cannot happen unless there was a coding
mistake. However, with system or library calls the situation is rather
different, and error returns can happen, and will happen, and should be
tested for. Not by an assert, where the test goes away when NDEBUG is
defined, but by proper error handling code. Never use this macro.
SEE ALSO
abort(3), assert(3), exit(3), strerror(3), feature_test_macros(7)
COLOPHON
This page is part of release 3.24 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.