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ASSERT_PERROR(3) Linux Programmer's Manual ASSERT_PERROR(3)
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. Other‐
wise, 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 con‐
tains 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)
GNU 2021-03-22 ASSERT_PERROR(3)