Or any options involving newer Linux kernel options. First problem being that 2.6.11 is the latest stable kernel headers, so I had to unmask the 2.6.16 headers. I noticed that one of the patches adds the -r and -e options, so I rebuilt bash with the newer kernel headers installed. However, even after rebuilding bash and starting a new bash session, the -r and -e options weren't available. I traced the problem to the fact that bash was only looking at sys/resource.h, but to get the RLIMIT defines you need to include linux/resource.h (or more specificly, asm-generic/resource.h, but that's included by asm/resource.h which is included by linux/resource.h). sys/resource.h only includes bits/resource.h (neither of which contain RLIMIT defines), and not the Linux-specific ones. I'd say this is a pretty major bug, as there's no other way, that I'm aware of, to set the rt priority/niceness limits without making your own program to call the setrlimit function (not to mention it makes the aforementioned ulimit patch completely useless as-is).
has nothing to do with linux-headers your glibc needs to define that value in bits/resource.h
