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abort(3) [opendarwin man page]

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

NAME
abort - cause abnormal process termination SYNOPSIS
#include <stdlib.h> void abort(void); DESCRIPTION
The abort() first unblocks the SIGABRT signal, and then raises that signal for the calling process (as though raise(3) was called). This results in the abnormal termination of the process unless the SIGABRT signal is caught and the signal handler does not return (see longjmp(3)). If the SIGABRT signal is ignored, or caught by a handler that returns, the abort() function will still terminate the process. It does this by restoring the default disposition for SIGABRT and then raising the signal for a second time. RETURN VALUE
The abort() function never returns. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+---------+ |Interface | Attribute | Value | +----------+---------------+---------+ |abort() | Thread safety | MT-Safe | +----------+---------------+---------+ NOTES
Up until glibc 2.26, if the abort() function caused process termination, all open streams were closed and flushed (as with fclose(3)). However, in some cases this could result in deadlocks and data corruption. Therefore, starting with glibc 2.27, abort() terminates the process without flushing streams. POSIX.1 permits either possible behavior, saying that abort() "may include an attempt to effect fclose() on all open streams". CONFORMING TO
SVr4, POSIX.1-2001, POSIX.1-2008, 4.3BSD, C89, C99. SEE ALSO
gdb(1), sigaction(2), assert(3), exit(3), longjmp(3), raise(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2017-11-26 ABORT(3)

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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 correspond- ing 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 inter- ference 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 Technol- ogy -- 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 Stan- dard 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)
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