Jeff Dike <[EMAIL PROTECTED]> writes: > How about splitting the credentials out of the task_struct and making > them sharable ala ->mm et al? You change uid there and it changes for > everyone. It will make fork slightly more expensive though.
Strictly that's required by POSIX anyways. But it's a real mess. The problem is that you would need to reference count/lock them in every syscall or ioctl or similar. Otherwise another thread could change them in the middle of a syscall which wouldn't be good. Doing this full reference counting would be probably somewhat expensive with more locked cycles and also a lot of work to implement. You would need to audit large parts of the source tree. I don't think it's a good idea. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
