Subject: Re: ATTENTION: avoid using libc.13
To: Jason Thorpe <firstname.lastname@example.org>
From: Greg A. Woods <email@example.com>
Date: 10/21/1997 10:16:06
[ On Tue, October 21, 1997 at 00:43:50 (-0700), Jason Thorpe wrote: ]
> Subject: Re: ATTENTION: avoid using libc.13
> No it's not. If we'd stayed with .13, or bumped it once more to .14,
> we would have broken nearly every third party library, and in fact
> noticed the problem when a couple of programs _did_ break.
> In a nutshell, here was the problem:
> - You have a program that was linked against e.g. libc.so.12
> and libkrb.so.2 (I believe this was the actual case).
> - You rebuild the world. This plops a new libc.so.13 down,
> and rebuilds libkrb.so.2.
> - Now, note that libkrb.so.2 uses stat(2). It's been built with
> the new includes.
> - Your program runs, and it binds libc.so.12. This means you're
> using the old stat(2), not the new stat(2) that libkrb.so.2 is
> - Your program goes boom.
I think you may misunderstand what I mean.
- undo the changes to stat(2) so that everything is as it was
- bump libc to libc.so.14 (or rather 15, but that's a diff. issue)
Nothing gets broken. Nobody has to jump through hoops. etc.
> At this point, libc.so.13 was already broken. We needed the old
> implementation to have the old name..
I don't see why. The old implementation with an even newer name should
suffice and if it doesn't then things are far more broken than I want to
Greg A. Woods
+1 416 443-1734 VE3TCP robohack!woods
Planix, Inc. <firstname.lastname@example.org>; Secrets Of The Weird <email@example.com>