.\"
.\" Copyright (c) 1999 Chris Costello
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.\" $FreeBSD: src/lib/libc/sys/kldunload.2,v 1.6.2.6 2001/12/14 18:34:01 ru Exp $
.\" $DragonFly: src/lib/libc/sys/kldunload.2,v 1.2 2003/06/17 04:26:47 dillon Exp $
.\"
.Dd March 3, 1999
.Dt KLDUNLOAD 2
.Os
.Sh NAME
.Nm kldunload
.Nd unload kld files
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/param.h
.In sys/linker.h
.Ft int
.Fn kldunload "int fileid"
.Sh DESCRIPTION
The function
.Fn kldunload
unloads a kld file from the kernel that was previously linked via
.Xr kldload 2 .
.Sh RETURN VALUES
The function
.Fn kldunload
returns the fileid of the kld file which was previously loaded into memory via
.Fn kldload .
If an error occurs,
.Fn kldunload
will return -1 and set
.Va errno
to indicate the error.
.Sh ERRORS
The file referred to by
.Fa fileid
is unloaded unless:
.Bl -tag -width Er
.It Bq Er EPERM
You don't have access to unlink the file from the kernel.
.It Bq Er ENOENT
The file was not found.
.It Bq Er EBUSY
You attempted to unload a file linked by the kernel.
.El
.Sh SEE ALSO
.Xr kldfind 2 ,
.Xr kldfirstmod 2 ,
.Xr kldload 2 ,
.Xr kldnext 2 ,
.Xr kldstat 2 ,
.Xr kldsym 2 ,
.Xr modfind 2 ,
.Xr modfnext 2 ,
.Xr modnext 2 ,
.Xr modstat 2 ,
.Xr kld 4 ,
.Xr kldunload 8
.Sh HISTORY
The
.Nm kld
interface first appeared in
.Fx 3.0 .