Hi, On Thu, Jul 30, 2009 at 5:20 AM, krushnaal pai<krisonearth@xxxxxxxxx> wrote: > i mean when i modified the callee function to return '5' instead of '0' , > however the usermodehelper module does not receive 5,instead it receives 0 > and yet says 'everything all right', all i want is that it(module) should > receive 5. Function call_usermodehelper has return value not dependent on called process (callee). Just read a documentation for call_usermodehelper: (Returns zero on success, else a negative error code). > > On Wed, Jul 29, 2009 at 1:03 PM, Belisko Marek <marek.belisko@xxxxxxxxx> > wrote: >> >> On Tue, Jul 28, 2009 at 4:24 PM, krushnaal pai<krisonearth@xxxxxxxxx> >> wrote: >> > i tried to implement an upcall in linux 2.6.28 using the codes given in >> > >> > "http://people.ee.ethz.ch/~arkeller/linux/kernel_user_space_howto.html#ss7.1"; >> > ( i have attached them) >> > but it just doesnt work.... >> > >> > it does printk the very first msg but at the call instruction it gives >> > an >> > error >> > >> > also plz help me know about the environment variables >> Could you please post error codes and also check if path to callee >> executable is >> correct on your machine? >> You need to compile first callee.c (with gcc callee.c -o callee) >> then change path to callee executable in usermodehelper.c >> and finally compile module usermodehelper.c. >> >> Then insert module with insmod and it should work. >> > >> >> good luck, >> >> Marek >> >> -- >> as simple as primitive as possible >> ------------------------------------------------- >> Marek Belisko - OPEN-NANDRA >> >> Ruska Nova Ves 219 | Presov, 08005 Slovak Republic >> Tel: +421 915 052 184 >> skype: marekwhite >> icq: 290551086 >> web: http://open-nandra.com > > good luck, marek -- as simple as primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite icq: 290551086 web: http://open-nandra.com -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
