abort

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



PROLOG
       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
       abort — generate an abnormal process abort

SYNOPSIS
       #include <stdlib.h>

       void abort(void);

DESCRIPTION
       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
       The abort() function shall not return.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       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
       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
       None.

SEE ALSO
       exit(), kill(), raise(), signal(), wait(), waitid()

       The Base Definitions volume of POSIX.1‐2008, <stdlib.h>

COPYRIGHT
       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(3POSIX)