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: src/lib/libc/stdlib/exit.3,v 1.6.2.4 2001/12/14 18:33:58 ru Exp $ 38.\" $DragonFly: src/lib/libc/stdlib/exit.3,v 1.2 2003/06/17 04:26:46 dillon Exp $ 39.\" 40.Dd June 4, 1993 41.Dt EXIT 3 42.Os 43.Sh NAME 44.Nm exit 45.Nd perform normal program termination 46.Sh LIBRARY 47.Lb libc 48.Sh SYNOPSIS 49.In stdlib.h 50.Ft void 51.Fn exit "int status" 52.Sh DESCRIPTION 53.Fn Exit 54terminates a process. 55.Pp 56Before termination it performs the following functions in the 57order listed: 58.Bl -enum -offset indent 59.It 60Call the functions registered with the 61.Xr atexit 3 62function, in the reverse order of their registration. 63.It 64Flush all open output streams. 65.It 66Close all open streams. 67.It 68Unlink all files created with the 69.Xr tmpfile 3 70function. 71.El 72.Pp 73Passing arbitrary values back to the environment as 74.Ar status 75is considered bad style; 76you should use the values 77.Dv EXIT_SUCCESS 78and 79.Dv EXIT_FAILURE . 80If portability is not a concern, you may 81use the values described in 82.Xr sysexits 3 . 83.Sh RETURN VALUES 84The 85.Fn exit 86function 87never returns. 88.Sh SEE ALSO 89.Xr _exit 2 , 90.Xr atexit 3 , 91.Xr intro 3 , 92.Xr sysexits 3 , 93.Xr tmpfile 3 94.Sh STANDARDS 95The 96.Fn exit 97function 98conforms to 99.St -isoC . 100