1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the American National Standards Committee X3, on Information 6.\" Processing Systems. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 3. All advertising materials mentioning features or use of this software 17.\" must display the following acknowledgement: 18.\" This product includes software developed by the University of 19.\" California, Berkeley and its contributors. 20.\" 4. Neither the name of the University nor the names of its contributors 21.\" may be used to endorse or promote products derived from this software 22.\" without specific prior written permission. 23.\" 24.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34.\" SUCH DAMAGE. 35.\" 36.\" @(#)exit.3 8.1 (Berkeley) 6/4/93 37.\" $FreeBSD$ 38.\" 39.Dd June 4, 1993 40.Dt EXIT 3 41.Os 42.Sh NAME 43.Nm exit 44.Nd perform normal program termination 45.Sh SYNOPSIS 46.Fd #include <stdlib.h> 47.Ft void 48.Fn exit "int status" 49.Sh DESCRIPTION 50.Fn Exit 51terminates a process. 52.Pp 53Before termination it performs the following functions in the 54order listed: 55.Bl -enum -offset indent 56.It 57Call the functions registered with the 58.Xr atexit 3 59function, in the reverse order of their registration. 60.It 61Flush all open output streams. 62.It 63Close all open streams. 64.It 65Unlink all files created with the 66.Xr tmpfile 3 67function. 68.El 69.Pp 70Passing arbitrary values back to the environment as 71.Ar status 72is considered bad style; 73you should use the values 74.Dv EXIT_SUCCESS 75and 76.Dv EXIT_FAILURE . 77If portability is not a concern, you may 78use the values described in 79.Xr sysexits 3 . 80.Sh RETURN VALUES 81The 82.Fn exit 83function 84never returns. 85.Sh SEE ALSO 86.Xr _exit 2 , 87.Xr atexit 3 , 88.Xr intro 3 , 89.Xr sysexits 3 , 90.Xr tmpfile 3 91.Sh STANDARDS 92The 93.Fn exit 94function 95conforms to 96.St -ansiC . 97