ASSERT_PERROR
Section: Linux Programmer's Manual (3)
Updated: 2017-09-15
Page Index
NAME
assert_perror - test errnum and abort
SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */
#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.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
assert_perror()
| Thread safety | MT-Safe
|
CONFORMING TO
This is a GNU extension.
BUGS
The purpose of the assert macros is to help programmers find bugs in
their programs, 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)
COLOPHON
This page is part of release 5.10 of the Linux
man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
https://www.kernel.org/doc/man-pages/.