Since we are looking up the path to newuidmap/newgidmap in one context,
and executing those in another (libct/nsenter), it might make sense to
use a stricter rules for looking up path to those binaries.
Practically it means that if someone wants to use custom newuidmap and
newgidmap binaries from $PATH, it would be impossible to use these from
the current directory by means of PATH=.:$PATH; instead one would have
to do something like PATH=$(pwd):$PATH.
See https://go.dev/blog/path-security for background.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
