PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

ABORT(3P)                 POSIX Programmer's Manual                ABORT(3P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior), or
       the interface may not be implemented on Linux.

NAME         top

       abort — generate an abnormal process abort

SYNOPSIS         top

       #include <stdlib.h>

       void abort(void);

DESCRIPTION         top

       The functionality described on this reference page is aligned with
       the ISO C standard. Any conflict between the requirements described
       here and the ISO C standard is unintentional. This volume of
       POSIX.1‐2008 defers to the ISO C standard.

       The abort() function shall cause abnormal process termination to
       occur, unless the signal SIGABRT is being caught and the signal
       handler does not return.

       The abnormal termination processing shall include the default actions
       defined for SIGABRT and may include an attempt to effect fclose() on
       all open streams.

       The SIGABRT signal shall be sent to the calling process as if by
       means of raise() with the argument SIGABRT.

       The status made available to wait(), waitid(), or waitpid() by
       abort() shall be that of a process terminated by the SIGABRT signal.
       The abort() function shall override blocking or ignoring the SIGABRT
       signal.

RETURN VALUE         top

       The abort() function shall not return.

ERRORS         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       Catching the signal is intended to provide the application developer
       with a portable means to abort processing, free from possible
       interference from any implementation-supplied functions.

RATIONALE         top

       The ISO/IEC 9899:1999 standard requires the abort() function to be
       async-signal-safe. Since POSIX.1‐2008 defers to the ISO C standard,
       this required a change to the DESCRIPTION from ``shall include the
       effect of fclose()'' to ``may include an attempt to effect
       fclose().''

       The revised wording permits some backwards-compatibility and avoids a
       potential deadlock situation.

       The Open Group Base Resolution bwg2002‐003 is applied, removing the
       following XSI shaded paragraph from the DESCRIPTION:

       ``On XSI-conformant systems, in addition the abnormal termination
       processing shall include the effect of fclose() on message catalog
       descriptors.''

       There were several reasons to remove this paragraph:

        *  No special processing of open message catalogs needs to be
           performed prior to abnormal process termination.

        *  The main reason to specifically mention that abort() includes the
           effect of fclose() on open streams is to flush output queued on
           the stream. Message catalogs in this context are read-only and,
           therefore, do not need to be flushed.

        *  The effect of fclose() on a message catalog descriptor is
           unspecified. Message catalog descriptors are allowed, but not
           required to be implemented using a file descriptor, but there is
           no mention in POSIX.1‐2008 of a message catalog descriptor using
           a standard I/O stream FILE object as would be expected by
           fclose().

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       exit(3p), kill(3p), raise(3p), signal(3p), wait(3p), waitid(3p)

       The Base Definitions volume of POSIX.1‐2008, stdlib.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) In the event of any discrepancy between this version and
       the original IEEE and The Open Group Standard, the original IEEE and
       The Open Group Standard is the referee document. The original
       Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the
       source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                 2013                           ABORT(3P)

Pages that refer to this page: stdlib.h(0p)assert(3p)