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117 lines
3.5 KiB
Groff
117 lines
3.5 KiB
Groff
.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the American National Standards Committee X3, on Information
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.\" Processing Systems.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)exit.3 8.1 (Berkeley) 6/4/93
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.\"
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.TH EXIT 3 "22 January 1997" GNO "Library Routines"
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.SH NAME
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.BR exit ,
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.BR _exit ,
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.BR rexit
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\- perform normal program termination
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.SH SYNOPSIS
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#include <stdlib.h>
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.sp 1
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void
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\fBexit\fR (int \fIstatus\fR);
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.br
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void
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\fBrexit\fR (int \fIstatus\fR);
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.sp 1
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#include <unistd.h>
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.sp 1
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void
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\fB_exit\fR (int \fIstatus\fR);
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.SH DESCRIPTION
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.BR exit
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terminates a process.
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.LP
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Before termination
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.BR exit
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performs the following functions in the order listed:
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.RS
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.sp 1
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Call the functions registered with the
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.BR atexit (3)
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function, in the reverse order of their registration.
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.sp 1
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Flush all open output streams.
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.sp 1
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Close all open streams.
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.sp 1
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Unlink all files created with the
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.BR tmpfile (3)
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function.
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.RE
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.LP
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.BR rexit
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is identical to
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.BR exit ,
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except that the process image will be flagged to GS/OS as restartable.
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.LP
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.BR _exit
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is similar to
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.BR exit ,
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except that no clean up is done except for the flushing and closing of
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any open streams.
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.BR _exit
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is the proper function to call when a child process exits while still
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executing in the address space of its parent process, such as after
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a failed
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.BR execve (2)
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call.
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.LP
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Passing arbitrary values back to the environment as
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.BR status
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is considered bad style. Instead, use the values as described in
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.BR sysexits (3).
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.SH RETURN VALUES
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The
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.BR exit
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function
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never returns.
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.SH SEE ALSO
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.BR atexit (3),
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.BR intro (3),
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.BR tmpfile (3),
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.BR sysexits (3)
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.SH STANDARDS
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The
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.BR exit
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function
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conforms to ANSI/C. The
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.BR _exit
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function is defined by POSIX 1003.1-88.
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