1ABORT(3P) POSIX Programmer's Manual ABORT(3P)
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6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
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13 abort — generate an abnormal process abort
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16 #include <stdlib.h>
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18 void abort(void);
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21 The functionality described on this reference page is aligned with the
22 ISO C standard. Any conflict between the requirements described here
23 and the ISO C standard is unintentional. This volume of POSIX.1‐2008
24 defers to the ISO C standard.
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26 The abort() function shall cause abnormal process termination to occur,
27 unless the signal SIGABRT is being caught and the signal handler does
28 not return.
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30 The abnormal termination processing shall include the default actions
31 defined for SIGABRT and may include an attempt to effect fclose() on
32 all open streams.
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34 The SIGABRT signal shall be sent to the calling process as if by means
35 of raise() with the argument SIGABRT.
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37 The status made available to wait(), waitid(), or waitpid() by abort()
38 shall be that of a process terminated by the SIGABRT signal. The
39 abort() function shall override blocking or ignoring the SIGABRT sig‐
40 nal.
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43 The abort() function shall not return.
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46 No errors are defined.
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48 The following sections are informative.
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51 None.
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54 Catching the signal is intended to provide the application developer
55 with a portable means to abort processing, free from possible interfer‐
56 ence from any implementation-supplied functions.
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59 The ISO/IEC 9899:1999 standard requires the abort() function to be
60 async-signal-safe. Since POSIX.1‐2008 defers to the ISO C standard,
61 this required a change to the DESCRIPTION from ``shall include the
62 effect of fclose()'' to ``may include an attempt to effect fclose().''
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64 The revised wording permits some backwards-compatibility and avoids a
65 potential deadlock situation.
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67 The Open Group Base Resolution bwg2002‐003 is applied, removing the
68 following XSI shaded paragraph from the DESCRIPTION:
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70 ``On XSI-conformant systems, in addition the abnormal termination pro‐
71 cessing shall include the effect of fclose() on message catalog
72 descriptors.''
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74 There were several reasons to remove this paragraph:
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76 * No special processing of open message catalogs needs to be per‐
77 formed prior to abnormal process termination.
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79 * The main reason to specifically mention that abort() includes the
80 effect of fclose() on open streams is to flush output queued on the
81 stream. Message catalogs in this context are read-only and, there‐
82 fore, do not need to be flushed.
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84 * The effect of fclose() on a message catalog descriptor is unspeci‐
85 fied. Message catalog descriptors are allowed, but not required to
86 be implemented using a file descriptor, but there is no mention in
87 POSIX.1‐2008 of a message catalog descriptor using a standard I/O
88 stream FILE object as would be expected by fclose().
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91 None.
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94 exit(), kill(), raise(), signal(), wait(), waitid()
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96 The Base Definitions volume of POSIX.1‐2008, <stdlib.h>
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99 Portions of this text are reprinted and reproduced in electronic form
100 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
101 -- Portable Operating System Interface (POSIX), The Open Group Base
102 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
103 cal and Electronics Engineers, Inc and The Open Group. (This is
104 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
105 event of any discrepancy between this version and the original IEEE and
106 The Open Group Standard, the original IEEE and The Open Group Standard
107 is the referee document. The original Standard can be obtained online
108 at http://www.unix.org/online.html .
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110 Any typographical or formatting errors that appear in this page are
111 most likely to have been introduced during the conversion of the source
112 files to man page format. To report such errors, see https://www.ker‐
113 nel.org/doc/man-pages/reporting_bugs.html .
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117IEEE/The Open Group 2013 ABORT(3P)