freebsd-dev/lib/libc/stdlib/exit.3

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.\"     @(#)exit.3	8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
.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 .