Thanks ikegami,

> For calls within the Perl interpreter, (e.g. for do and require), Perl provides a wealth of information via caller.

My current "need" (OK, whim) is for 'do', but the doco doesn't mention 'do' as something 'caller' works for.  I'll live.

Thanks JavaFan,

> (I presume with "call" you mean a regular fork/exec combo...

>> The call could be via a 'do' or 'system' or `` or 'exec'.

Thanks TomDLux,

> If you're on Windows, you're welcome to switch to Unix.

Well said!  Fortunately, I'm already on Linux.

Thanks to each of you for your good/prompt responses!