xref: /freebsd/lib/libutil/kld.3 (revision e738085b94631f90e21a49852538ac95974baf44)

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.Dd February 18, 2006
.Dt KLD 3
.Os
.Sh NAME
.Nm kld_isloaded ,
.Nm kld_load
.Nd kld utility functions
.Sh LIBRARY
.Lb libutil
.Sh SYNOPSIS
.In libutil.h
.Ft int
.Fn kld_isloaded "const char *name"
.Ft int
.Fn kld_load "const char *name"
.Sh DESCRIPTION
These functions facilitate loading kernel modules from userland
applications.
.Pp
The
.Fn kld_isloaded
function takes a name and returns a non-zero value if a module of that
name is currently loaded.
The name can be either the name of a module file
.Pq Pa cpufreq.ko ,
the same name without the
.Pa .ko
extension
.Pq Pa cpufreq ,
or the name of a module contained within that file
.Pq Pa cpu/ichss .
Only the latter will return correct results if the module is compiled
into the kernel.
.Pp
The
.Fn kld_load
function is a simple wrapper around the
.Xr kldload 2
function.
It returns zero if and only if the corresponding
.Fn kldload
call succeeded or returned
.Er EEXIST
(signifying that the requested module was already loaded).
.Sh SEE ALSO
.Xr kldfirstmod 2 ,
.Xr kldload 2 ,
.Xr kldnext 2 ,
.Xr kldstat 2 ,
.Xr modfnext 2 ,
.Xr modstat 2 ,
.Xr kld 4
.Sh HISTORY
The
.Fn kld_isloaded
and
.Fn kld_load
functions first appeared in
.Fx 6.3 .
.Sh AUTHORS
The
.Fn kld_isloaded
and
.Fn kld_load
functions and this manual page were written by
.An Dag-Erling Sm\(/orgrav Aq Mt des@FreeBSD.org .