mirror of https://github.com/mkerrisk/man-pages
111 lines
3.2 KiB
Groff
111 lines
3.2 KiB
Groff
.\" Copyright 2007 (C) Michael Kerrisk <mtk.manpages@gmail.com>
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.\" some parts Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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.\"
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.\" %%%LICENSE_START(VERBATIM)
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\" %%%LICENSE_END
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.\"
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.\" References consulted:
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.\" Linux libc source code
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.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
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.\" 386BSD man pages
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.\" Modified Sat Jul 24 21:46:21 1993 by Rik Faith (faith@cs.unc.edu)
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.\" Modified Fri Aug 4 10:51:53 2000 - patch from Joseph S. Myers
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.\" 2007-12-15, mtk, Mostly rewritten
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.\"
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.TH ABORT 3 2021-03-22 "GNU" "Linux Programmer's Manual"
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.SH NAME
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abort \- cause abnormal process termination
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.SH SYNOPSIS
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.nf
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.B #include <stdlib.h>
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.PP
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.B noreturn void abort(void);
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.fi
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.SH DESCRIPTION
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The
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.BR abort ()
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function first unblocks the
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.B SIGABRT
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signal, and then raises that signal for the calling process
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(as though
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.BR raise (3)
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was called).
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This results in the abnormal termination of the process unless the
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.B SIGABRT
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signal is caught and the signal handler does not return
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(see
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.BR longjmp (3)).
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.PP
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If the
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.B SIGABRT
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signal is ignored, or caught by a handler that returns, the
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.BR abort ()
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function will still terminate the process.
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It does this by restoring the default disposition for
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.B SIGABRT
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and then raising the signal for a second time.
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.SH RETURN VALUE
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The
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.BR abort ()
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function never returns.
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.SH ATTRIBUTES
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For an explanation of the terms used in this section, see
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.BR attributes (7).
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.ad l
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.nh
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.TS
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allbox;
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lbx lb lb
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l l l.
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Interface Attribute Value
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T{
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.BR abort ()
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T} Thread safety MT-Safe
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.TE
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.hy
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.ad
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.sp 1
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.SH CONFORMING TO
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SVr4, POSIX.1-2001, POSIX.1-2008, 4.3BSD, C89, C99.
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.SH NOTES
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Up until glibc 2.26,
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if the
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.BR abort ()
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function caused process termination,
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all open streams were closed and flushed (as with
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.BR fclose (3)).
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However, in some cases this could result in deadlocks and data corruption.
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Therefore, starting with glibc 2.27,
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.\" glibc commit 91e7cf982d0104f0e71770f5ae8e3faf352dea9f
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.BR abort ()
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terminates the process without flushing streams.
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POSIX.1 permits either possible behavior, saying that
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.BR abort ()
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"may include an attempt to effect fclose() on all open streams".
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.SH SEE ALSO
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.BR gdb (1),
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.BR sigaction (2),
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.BR assert (3),
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.BR exit (3),
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.BR longjmp (3),
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.BR raise (3)
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