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.\" Copyright (c) 1990, 1991 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" the American National Standards Committee X3, on Information
.\" Processing Systems.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $OpenBSD: abort.3,v 1.11 2014/05/14 21:54:20 tedu Exp $
.\"
.Dd $Mdocdate: May 14 2014 $
.Dt ABORT 3
.Os
.Sh NAME
.Nm abort
.Nd cause abnormal program termination
.Sh SYNOPSIS
.In stdlib.h
.Ft void
.Fn abort void
.Sh DESCRIPTION
The
.Fn abort
function causes abnormal program termination to occur, unless the signal
.Dv SIGABRT
is being caught and the signal handler does not return.
.Pp
Some implementations may flush output streams before terminating.
This implementation does not.
.Sh RETURN VALUES
The
.Fn abort
function never returns.
.Sh SEE ALSO
.Xr sigaction 2 ,
.Xr exit 3
.Sh STANDARDS
The
.Fn abort
function conforms to
.St -p1003.1-90 .
.Sh HISTORY
The
.Fn abort
function first appeared in
.At v5 .
.Pp
Historically, previous standards required
.Fn abort
to flush and close output streams, but this conflicted with the requirement
that
.Fn abort
be async signal safe.
As a result, the flushing requirement was dropped.
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