Re: How to use a different ld-linux.so?

[Paul Jarc]

"Paul Smith" <pausmith@nortelnetworks.com> wrote:
> %% prj@po.cwru.edu (Paul Jarc) writes:
>   pj> Ok.  Can you relink the newer system's binaries, though?  This
>   pj> would work on Linux, if you can stand the smell: use
>   pj> /proc/self/fd/42/lib in the binaries, and always make sure
>   pj> descriptor 42 is open to the right "root" directory.
>
> Yow!!!

You bet, yow.  It works on Solaris too, except that Solaris doesn't
have /proc/self.

> That's crazy!  Have you tried this; does it really work?

Not specifically with dynamic linking, but:
$ ls -lid src /proc/self/fd/42/src 42< .
3972 drwxr-xr-x  18 prj default 528 Jun 29 22:26 /proc/self/fd/42/src
3972 drwxr-xr-x  18 prj default 528 Jun 29 22:26 src

The fd/* entries seem to work just like normal symlinks, at least for
2.4.


paul