RE: KLD and UID
What version of FreeBSD are you trying this on? You might want to look at this thread on hackers@, it's very similar to what you're trying to do, I think: Yes, I think I found that thread yesterday. I am trying it on the 5.x series and I notice that the proc pointer argument of a syscall has become a thread pointer. That would, of course, explain the horrible crashes. It is just a shame that I discovered that after my assignment was handed in, ah well such is life. Thanks for your help, Simon ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: KLD and UID
On Tue, 16 Mar 2004 23:09:36 -0700 Simon Timms [EMAIL PROTECTED] wrote: Hi there, I am playing around with kernel modules trying to learn something and hopefully not destroy my computer too badly. Right now my goal is to print out the user id from an open() call. I am basing my work around that found at http://www.nux-acid.org/src/open.c. To that basic code I added (in the new_open method) printf(uid %u\n, p-p_ucred-cr_uid); However this completely doesn't work and I end up crashing the kernel. I notice in other places people do things like uid_t uid = p-p_cred-p_svuid; however I don't see a p_cred member in the proc structure. Is there something obvious I am missing here? Complete code listing at http://simon.ma.cx/module.c. Any additional comments/criticisms always appreciated. Thanks, Simon What version of FreeBSD are you trying this on? You might want to look at this thread on hackers@, it's very similar to what you're trying to do, I think: http://docs.freebsd.org/cgi/mid.cgi?20040316163956.GD638 -Chris ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
KLD and UID
Hi there, I am playing around with kernel modules trying to learn something and hopefully not destroy my computer too badly. Right now my goal is to print out the user id from an open() call. I am basing my work around that found at http://www.nux-acid.org/src/open.c. To that basic code I added (in the new_open method) printf(uid %u\n, p-p_ucred-cr_uid); However this completely doesn't work and I end up crashing the kernel. I notice in other places people do things like uid_t uid = p-p_cred-p_svuid; however I don't see a p_cred member in the proc structure. Is there something obvious I am missing here? Complete code listing at http://simon.ma.cx/module.c. Any additional comments/criticisms always appreciated. Thanks, Simon ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
