redhat man page for assert_perror

ASSERT_PERROR(3)					     Linux Programmer's Manual						  ASSERT_PERROR(3)

NAME
       assert_perror - test errnum and abort

SYNOPSIS
       #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 output and  terminates  the  program  by  calling
       abort()	if  errnum  is nonzero. The message contains the filename, function name and line number of the macro call, and the output of str-
       error(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
       exit(3), abort(3), assert(3), strerror(3)

GNU
								    2002-08-25							  ASSERT_PERROR(3)