abort(3p) — Linux manual page

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

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.1‐2017 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(3p), kill(3p), raise(3p), signal(3p), wait(3p), waitid(3p)

       The Base Definitions volume of POSIX.1‐2017, stdlib.h(0p)

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  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.opengroup.org/unix/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               2017                         ABORT(3P)

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

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