.\" 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. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. 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. .\" .\" @(#)exit.3 8.1 (Berkeley) 6/4/93 .\" $FreeBSD: src/lib/libc/stdlib/exit.3,v 1.10 2001/09/07 14:46:35 asmodai Exp $ .\" .Dd June 4, 1993 .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. .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 Passing arbitrary values back to the environment as .Ar status is considered bad style; you should use the values .Dv EXIT_SUCCESS and .Dv EXIT_FAILURE . If portability is not a concern, you may use the values described in .Xr sysexits 3 . .Sh RETURN VALUES The .Fn exit function never returns. .Sh SEE ALSO .Xr _exit 2 , .Xr atexit 3 , .Xr intro 3 , .Xr sysexits 3 , .Xr tmpfile 3 .Sh STANDARDS The .Fn exit function conforms to .St -isoC .