Re: Acceptable kernel code?

Theodore Y. Ts'o (tytso@MIT.EDU)
Mon, 5 May 1997 17:25:54 -0400

From: "James R. Leu" <>
Date: Mon, 5 May 1997 13:15:14 -0500 (CDT)

I think I know this answer, but just to verify:

Is it acceptable to use functions like gethostbyname() inside of the

Not only is it unacceptable, it simply won't work. :-)

Normally a userland function call should stay in userland, right?
Well what about in a thread like nfsiod? It is kind of in userland
(it's a process) and kind of in kernel land.

You don't have access to libc while you're in kernel land. There is a
subset of libc functions which are implemented for kernel processes, but
it's a very limited subset.

- Ted