In most of the variants of exec*() there are separate arguments for the thing to be executed and the *argv[] list. Argv[0] being the executable is just a convention. In perl $ARGV[0] is the first positional parameter. In

    $ perl myscript.pl a b c

$ARGV[0] is "a".

I mean sure. All software is built on assumptions. Make sure the assumptions you’re making are appropriate in context.

Unless you are on Windows