[PATCH] libc: do not rely upon ulimit kernel syscall.

[Rich Felker]

On Thu, Nov 17, 2011 at 11:14:10AM -0500, Mike Frysinger wrote:
> On Friday 04 November 2011 08:50:02 Bernhard Reutner-Fischer wrote:
> > On 3 November 2011 09:31, Carmelo AMOROSO <carmelo.amoroso at st.com> wrote:
> > > On several architectures __NR_ulimit syscall number is currently
> > > defined but it is remapped onto sys_ni_syscall, while on other
> > > architectures they are not longer defined.
> > > So use {get,set}rlimit only to implement ulimit interface.
> > > 
> > > It fixes LTP ulimit01 test case.
> > 
> > What about fixing the kernel instead to not define numbers for the
> > unavailable stuff?
> 
> yeah, that makes more sense to me.  if your headers say you have the ulimit 
> syscall, we shouldn't bother trying to emulate it in userspace.  fix the kernel 
> and be done.

I really have to ask... WHY? Why bother with extra code complexity and
maintenance burden to support using an ancient, deprecated syscall for
a deprecated nonstandard userspace function when it can be cleanly and
universally emulated in terms of a modern, universally-supported
standard function?

Rich