On Sun, 15 Feb 2015, Cyd Haselton wrote:
> On Sun, Feb 15, 2015 at 12:41 PM, Cyd Haselton <chasel...@gmail.com> wrote:
>
> *snip*
> >
> >> So to obtain the pointer to
> >> dlopen the code like above can use dlsym(RTLD_DEFAULT, "dlopen"), but not
> >> RTLD_NEXT (the loader precedes the fakeroot library in the lookup chain).
> >>
> *snip*
>
> Just a quick update: RTLD_DEFAULT is definitely not the solution here
> as it results in a segfault when libfakechroot loads. Perhaps a
> different RTLD_FLAG was meant?
I think you need to use RTLD_DEFAULT only when resolving "dlopen", and keep
RTLD_NEXT for all other symbol names (unless later on you run into other
symbols with similar behavior). Something like
... = dlsym(strcmp(name, "dlopen") ? RTLD_NEXT : RTLD_DEFAULT, name);
Alexander
