xref: /freebsd/lib/libutil/kld.3 (revision 501092bbc8249ed8ba51098acb45fce2b4700ff5)

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.Dd February 18, 2006
.Os
.Dt KLD 3
.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
.Po
.Va cpufreq.ko
.Pc ,
the same name without the
.Pa .ko
extension
.Po
.Va cpufreq
.Pc ,
or the name of a module contained within that file
.Po
.Va cpu/ichss
.Pc .
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
.Fn kldload
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
.Sh HISTORY
The
.Fn kld_isloaded
and
.Fn kld_load
functions first appeared in
.Fx 7.0 .
.Sh AUTHORS
The
.Fn kld_isloaded
and
.Fn kld_load
functions and this manual page were written by
.An Dag-Erling Sm\(/orgrav Aq des@FreeBSD.org .