Sorry to annoy you, but I still don't like it this way. On my system, `which perl` will return "/usr/local/bin/perl", so "/usr/bin/perl\cM" will still not exist. Also, which is just an alias for type -p, so I doubt if it's portable (it might not even work if it's defined in bashrc, that's read only in interactive sessions). (Also, on some machines, /usr/local/bin/perl is a later version of perl than /usr/bin/perl.)