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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/.

GNU                                                2017-09-15                                   ASSERT_PERROR(3)