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



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

NNAAMMEE
       abort -- generate an abnormal process abort

SSYYNNOOPPSSIISS
       #include <stdlib.h>

       void abort(void);

DDEESSCCRRIIPPTTIIOONN
       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 _a_b_o_r_t() 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 _f_c_l_o_s_e() on
       all open streams.

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

       The status made available to _w_a_i_t(), _w_a_i_t_i_d(), or _w_a_i_t_p_i_d() by _a_b_o_r_t()
       shall be that of a process terminated by the SIGABRT signal.  The
       _a_b_o_r_t() function shall override blocking or ignoring the SIGABRT
       signal.

RREETTUURRNN VVAALLUUEE
       The _a_b_o_r_t() function shall not return.

EERRRROORRSS
       No errors are defined.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
       None.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       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.

RRAATTIIOONNAALLEE
       The ISO/IEC 9899:1999 standard requires the _a_b_o_r_t() 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 _f_c_l_o_s_e()'' to ``may include an attempt to effect _f_c_l_o_s_e().''

       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 _f_c_l_o_s_e() 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 _a_b_o_r_t() includes the
           effect of _f_c_l_o_s_e() 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 _f_c_l_o_s_e() 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 _f_c_l_o_s_e().

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _e_x_i_t(), _k_i_l_l(), _r_a_i_s_e(), _s_i_g_n_a_l(), _w_a_i_t(), _w_a_i_t_i_d()

       The Base Definitions volume of POSIX.1-2017, <<ssttddlliibb..hh>>

CCOOPPYYRRIIGGHHTT
       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(3)
