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 LIBRARY 46.Lb libc 47.Sh SYNOPSIS 48.In stdlib.h 49.Ft void 50.Fn exit "int status" 51.Sh DESCRIPTION 52.Fn Exit 53terminates a process. 54.Pp 55Before termination it performs the following functions in the 56order listed: 57.Bl -enum -offset indent 58.It 59Call the functions registered with the 60.Xr atexit 3 61function, in the reverse order of their registration. 62.It 63Flush all open output streams. 64.It 65Close all open streams. 66.It 67Unlink all files created with the 68.Xr tmpfile 3 69function. 70.El 71.Pp 72Passing arbitrary values back to the environment as 73.Ar status 74is considered bad style; 75you should use the values 76.Dv EXIT_SUCCESS 77and 78.Dv EXIT_FAILURE . 79If portability is not a concern, you may 80use the values described in 81.Xr sysexits 3 . 82.Sh RETURN VALUES 83The 84.Fn exit 85function 86never returns. 87.Sh SEE ALSO 88.Xr _exit 2 , 89.Xr atexit 3 , 90.Xr intro 3 , 91.Xr sysexits 3 , 92.Xr tmpfile 3 93.Sh STANDARDS 94The 95.Fn exit 96function 97conforms to 98.St -isoC . 99