Re: Exec'ing user space helper programs

From: Chris Proctor (chrisp_42@bigpond.com)
Date: Sat Feb 12 2000 - 18:19:19 EST


On Sat, Feb 12, 2000 at 09:56:16AM -0800, Linus Torvalds wrote:
>
>
> On Sat, 12 Feb 2000, Thomas Sailer wrote:
> >
> > Exec'ing a user mode program however is not so straigtforward,
> > everytime I look into kmod.c the code gets more complex 8-)
> > Up to now I just copied the code from kmod.c into my driver,
> > but the code duplication starts to get annoying, furthermore
> > a couple of routines (free_uid and flush_signal_handlers)
> > are not even exported.
> >
> > So I'd like to export the exec-facility of kmod.
> >
> > The following is a patch to do this.
> >
> > Comments?
>
> Looks good. This is something we'll probably need for other things:
> hot-plug devices need to inform user space about [dis-]appearance etc.
> Applied.

In 2.3.44 this change causes one of the ppp-* files to not compile
if CONFIG_KMOD is not defined. The following patch fixes it for me:

--- include/linux/kmod.h.orig Sun Feb 13 08:44:07 2000
+++ include/linux/kmod.h Sun Feb 13 09:59:25 2000
@@ -3,6 +3,7 @@
 */
 
 #include <linux/config.h>
+#include <linux/errno.h>
 
 #ifdef CONFIG_KMOD
 extern int request_module(const char * name);

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