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Date: Sat, 14 Feb 2004 14:08:56 +0900
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From: Kimura Fuyuki <fuyuki@nigredo.org>
To: arne@rfc2549.org
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cc: kan@FreeBSD.ORG
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Subject: Re: dynamic linker problem
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At Sat, 14 Feb 2004 04:05:25 +0100,
Arne Schwabe <arne@rfc2549.org> wrote:
> 
> Kimura Fuyuki <fuyuki@nigredo.org> writes:
> 
> > OK, I more clearly point out the problem; run the following test and
> > think that behavior is secure/modular/comfortable or not.
> >
> > BEGIN--cut here--cut here
> > #!/bin/sh
> >
> > cat <<'[EOF]' >crypt.c
> > /* Define this function since I want to do so! */
> > char *crypt_md5(const char *pw, const char *salt)
> > {
> > 	return "imbogus";
> > }
> > [EOF]
> >
> > cat <<'[EOF]' >dltest.c
> > #include <stdio.h>
> > #include <dlfcn.h>
> >
> > int main(void)
> > {
> > 	void *h;
> > 	char *(*crypt)(const char *, const char *);
> >
> > 	h = dlopen("/lib/libcrypt.so", 0);
> 
> At least on my system /lib/libcrypt.so does not even exist, if I
> change it to /lib/libcrypt.so.2 it works.

Ouch. I've pointed at the stale link.

But what I wanted to say is "why does crypt() call crypt_md5 in
crypt.so rather than libcrypt.so.2 ?". Is the current behavior normal?

-- fuyuki