96 lines
3.2 KiB
Groff
96 lines
3.2 KiB
Groff
.\" Copyright (c) 1980 Regents of the University of California.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" 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. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. 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.
|
|
.\"
|
|
.\" from: @(#)_exit.2 6.6 (Berkeley) 7/25/91
|
|
.\" $Id: _exit.2,v 1.5 1994/10/17 23:49:08 cgd Exp $
|
|
.\"
|
|
.Dd July 25, 1991
|
|
.Dt EXIT 2
|
|
.Os BSD 4
|
|
.Sh NAME
|
|
.Nm _exit
|
|
.Nd terminate the calling process
|
|
.Sh SYNOPSIS
|
|
.Fd #include <unistd.h>
|
|
.Ft void
|
|
.Fn _exit "int status"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn _exit
|
|
function
|
|
terminates a process with the following consequences:
|
|
.Bl -bullet
|
|
.It
|
|
All of the descriptors open in the calling process are closed.
|
|
This may entail delays, for example, waiting for output to drain;
|
|
a process in this state may not be killed, as it is already dying.
|
|
.It
|
|
If the parent process of the calling process has an outstanding
|
|
.Xr wait
|
|
call
|
|
or is interested in the
|
|
.Dv SIGCHLD
|
|
signal,
|
|
it is notified of the calling process's termination and
|
|
the
|
|
.Em status
|
|
area is set as defined by
|
|
.Xr wait 2 .
|
|
.It
|
|
The parent process-ID of all of the calling process's existing child
|
|
processes are set to 1; the initialization process
|
|
(see the DEFINITIONS section of
|
|
.Xr intro 2 )
|
|
inherits each of these processes.
|
|
Any stopped children are restarted with a hangup signal
|
|
.Pq Dv SIGHUP .
|
|
.El
|
|
.Pp
|
|
Most C programs call the library routine
|
|
.Xr exit 3 ,
|
|
which flushes buffers, closes streams, unlinks temporary files, etc.,
|
|
before
|
|
calling
|
|
.Fn _exit .
|
|
.Sh RETURN VALUE
|
|
.Fn _exit
|
|
can never return.
|
|
.Sh SEE ALSO
|
|
.Xr fork 2 ,
|
|
.Xr sigaction 2 ,
|
|
.Xr wait 2 ,
|
|
.Xr exit 3
|
|
.Sh HISTORY
|
|
An
|
|
.Fn exit
|
|
function call appeared in
|
|
.At v6 .
|