From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Date: Sat, 04 Mar 2006 05:42:53 +0000 Subject: Re: How to check if driver is in-built or module? Message-Id: <20060304054253.GA3732@kroah.com> List-Id: References: <1141418150.4408a8a625721@cs1.alpha12.l-secure.net> In-Reply-To: <1141418150.4408a8a625721@cs1.alpha12.l-secure.net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org On Sat, Mar 04, 2006 at 04:49:43AM +0200, juuso.alasuutari@tamperelainen.org wrote: > > > How can I tell udev to modprobe only if exists and hasn't > > been > > > compiled in the kernel? In my experience modules are visible to udev only > > when > > > and after they are loaded, which makes finding a solution to my problem a > > bit > > > of a paradox. > > > > Look in /sys/module/ That will have the module name if the module is > > loaded _or_ if the module is built into the kernel. > > > > If it's not there, then it should be safe to load it. > > Thanks, that helped a lot. I wrote the following rules for snd_pcm_oss and rtc > based on your hint: > > # Load ALSA OSS emulation sound module if not already loaded. > KERNEL!="snd_pcm_oss", SUBSYSTEM!="module", ACTION="add", RUN+="/sbin/modprobe > snd_pcm_oss" > > # Load real time clock module if not already loaded. > KERNEL!="rtc", SUBSYSTEM!="module", RUN+="/sbin/modprobe rtc" No, this kind of thing belongs in your distro's "load these modules at boot time" list. Everyone has this, it's just in different locations (/etc/sysconfig/modules in SuSE, /etc/modules.autoload/kernel-2.6/ for Gentoo, etc.) Don't mess with udev rules for things like this, it's just not worth it. Use the infrastructure that is already present and solves this today. thanks, greg k-h ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid0944&bid$1720&dat1642 _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel