minix/lib/libc/stdlib/exit.3

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.\" $NetBSD: exit.3,v 1.14 2003/08/07 16:43:39 agc Exp $
.\"
.\" Copyright (c) 1990, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
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.\" This code is derived from software contributed to Berkeley by
.\" the American National Standards Committee X3, on Information
.\" Processing Systems.
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.\" modification, are permitted provided that the following conditions
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.\" from: @(#)exit.3 8.1 (Berkeley) 6/4/93
.\"
.Dd August 11, 2002
.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 .
Note that typically
.Xr _exit 2
only passes the lower 8 bits of
.Fa status
on to the parent, thus negative values have less meaning.
.Sh RETURN VALUES
The
.Fn exit
function
never returns.
.Sh SEE ALSO
.Xr _exit 2 ,
.Xr atexit 3 ,
.Xr intro 3 ,
.Xr tmpfile 3
.Sh STANDARDS
The
.Fn exit
function
conforms to
.St -ansiC .