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.\" $FreeBSD: release/8.1.0/lib/libc/gen/dlopen.3 205979 2010-03-31 13:51:31Z gahr $
.\"
.Dd April 29, 2011
.Dt DLCLOSE 3
.Os
.Sh NAME
.Nm dlclose
.Nd unlink shared object from process address space
.Sh LIBRARY
This function is not in a library.
It is included in every dynamically linked program automatically.
.Sh SYNOPSIS
.In dlfcn.h
.Ft int
.Fn dlclose "void *handle"
.Sh DESCRIPTION
The
.Fn dlclose
function
deletes a reference to the shared object referenced by
.Fa handle .
If the reference count drops to 0, the object is removed from the
address space, and
.Fa handle
is rendered invalid.
Just before removing a shared object in this way, the dynamic linker
calls the object's
.Fn _fini
function, if such a function is defined by the object.
.Pp
The object-intrinsic functions
.Fn _init
and
.Fn _fini
are called with no arguments, and are not expected to return values.
.Sh RETURN VALUES
The
.Fn dlclose
function
returns 0 on success, or -1 if an error occurred.
Whenever an error has been detected, a message detailing it can be
retrieved via a call to
.Fn dlerror .
.Sh SEE ALSO
.Xr rtld 1 ,
.Xr dlerror 3 ,
.Xr dlfcn 3 ,
.Xr dlopen 3