I'm not trying to be rude, but I'm sorry...
Are you seriously suggesting that rewriting an implementation of the C standard library in a language that isn't C is something that makes any bit of sense?
I think you have a fundemental understanding of the roll the C-standard library plays in the C language. Not to mention UNIX in general.
Maybe you're suggesting we need an OS based in Rust instead of C (which is more reasonable), but in that case why wouldn't you use Rust's standard library as the backbone of that system?
Let me put it this way, if the GNU/Linux C standard library gets rewritten in Rust or Idris (sigh... seriously?) I will switch to Windows 10 with default settings for the rest of my life. I would rather have the NSA log my every key stroke than participate in a community where that is considered a good idea.