On Tue, Mar 26, 2024 at 11:46 AM Peter Eisentraut <peter@eisentraut.org> wrote:
> What determines which variables require this treatment?
That came from me peeking at their code:
https://www.postgresql.org/message-id/CA%2BhUKGKNK5V8XwwJJZm36s3EUy8V51xu4XiE8%3D26n%3DWq3OGd4A%40mail.gmail.com
I had originally proposed to avoid anything beginning "LD_" but Tom
suggested being more specific. I doubt LD_PRELOAD can really hurt you
though (the linker probably only needs the value at the start by
definition, not at later dlopen() time (?)). I dunno. If you're
asking if there is any standard or whatever supplying these names, the
System V or at least ELF standards talk about LD_LIBRARY_PATH (though
those standards don't know/care what happens after userspace takes
over control of the environment concept, they just talk about how the
world is created when you exec a process, so they AFAICS they don't
address this clobbering stuff, and AFAIK other LD_XXX stuff is
probably implementation specific).
