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ASSERT_PERROR - reference manual online

Test errnum and abort.

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2015-03-02
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. 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 4.04 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 http://www.kernel.org/doc/man-pages/.
GNU 2015-03-02 ASSERT_PERROR(3)
This manual Reference Other manuals
assert_perror(3) referred by assert(3)
refer to abort(3) | assert(3) | attributes(7) | exit(3) | feature_test_macros(7) | strerror(3)