.\"
.\" Copyright (c) 1999 Chris Costello
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.Dd December 25, 2008
.Dt KLDUNLOAD 2
.Os
.Sh NAME
.Nm kldunload , kldunloadf
.Nd unload kld files
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/param.h
.In sys/linker.h
.Ft int
.Fn kldunload "int fileid"
.Ft int
.Fn kldunloadf "int fileid" "int flags"
.Sh DESCRIPTION
The
.Fn kldunload
system call
unloads a kld file from the kernel that was previously linked via
.Xr kldload 2 .
.Pp
The
.Fn kldunloadf
system call accepts an additional flags argument, which may be one of
.Dv LINKER_UNLOAD_NORMAL ,
giving the same behavior as
.Fn kldunload ,
or
.Dv LINKER_UNLOAD_FORCE ,
which causes the unload to ignore a failure to quiesce the module.
.Sh RETURN VALUES
.Rv -std
.Sh ERRORS
The file referred to by
.Fa fileid
is unloaded unless:
.Bl -tag -width Er
.It Bq Er EPERM
You do not 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.
.It Bq Er EINVAL
The
.Fn kldunloadf
system call was passed invalid flags.
.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 .