NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | CONFORMING TO | BUGS | SEE ALSO | COLOPHON
ASSERT_PERROR(3) Linux Programmer's Manual ASSERT_PERROR(3)
assert_perror - test errnum and abort
#define _GNU_SOURCE
#include <assert.h>
void assert_perror(int errnum);
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 non-zero. The
message contains the filename, function name and line number of the macro
call, and the output of strerror(errnum).
No value is returned.
This is a GNU extension.
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.
abort(3), assert(3), exit(3), strerror(3), feature_test_macros(7)
This page is part of release 3.23 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/.
GNU 2002-08-25 ASSERT_PERROR(3)