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+.\" $NetBSD: exit.3,v 1.17 2019/09/01 19:37:21 sevan Exp $
+.\"
+.\" Copyright (c) 1990, 1991, 1993
+.\"	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.
+.\"
+.\"     from: @(#)exit.3	8.1 (Berkeley) 6/4/93
+.\"
+.Dd September 1, 2019
+.Dt EXIT 3
+.Os
+.Sh NAME
+.Nm exit
+.Nd perform normal program termination
+.Sh LIBRARY
+.Lb libc
+.Sh SYNOPSIS
+.In stdlib.h
+.Ft void
+.Fn exit "int status"
+.Sh DESCRIPTION
+.Fn exit
+terminates a process.
+The
+.Fa status
+values
+.Dv EXIT_SUCCESS
+and
+.Dv EXIT_FAILURE
+can be used to indicate successful and unsuccessful
+termination, respectively.
+.Pp
+Before termination it performs the following functions in the
+order listed:
+.Bl -enum -offset indent
+.It
+Call the functions registered with the
+.Xr atexit 3
+function, in the reverse order of their registration.
+.It
+Flush all open output streams.
+.It
+Close all open streams.
+.It
+Unlink all files created with the
+.Xr tmpfile 3
+function.
+.El
+.Pp
+Following this,
+.Fn exit
+calls
+.Xr _exit 2 .
+.Sh RESTRICTIONS
+Standard C guarantees only that the values zero,
+.Dv EXIT_SUCCESS ,
+and
+.Dv EXIT_FAILURE
+produce meaningful results.
+POSIX extends this to guarantee that the
+least significant 8 bits of
+.Fa status
+are preserved and returned to the parent via
+.Xr wait 2 .
+Values outside the supported range 0-255 are bitwise-truncated; therefore,
+negative values should not be used.
+.Sh RETURN VALUES
+The
+.Fn exit
+function
+never returns.
+.Sh SEE ALSO
+.Xr _exit 2 ,
+.Xr at_quick_exit 3 ,
+.Xr atexit 3 ,
+.Xr intro 3 ,
+.Xr quick_exit 3 ,
+.Xr tmpfile 3
+.Sh STANDARDS
+The
+.Fn exit
+function
+conforms to
+.St -ansiC .
+.Sh HISTORY
+The
+.Fn exit
+function appeared in
+.At v1 .