I am new to linux kernel programming, and I've run into a spot of trouble. I need to use the prepare_creds() and commit_creds() functions from cred.h, but the Ubuntu 8.04 image I'm working off of does not seem to have that header at all. (uname -r gives me 2.6.24-19-generic) The other headers I'm using all seem to be in /usr/src, just not cred.h. If cred.h is not available for that version of the kernel, what else can I use that has similar functionality? Thanks for any help, I'm a bit lost.