[Info-vax] Foreign commands ... newbie question

[Bob Koehler]

In article <j7ic30$f0d$2 at Iltempo.Update.UU.SE>, Johnny Billquist <bqt at softjar.se> writes:
> 
> The problem that sh and descendants don't have a built-in which. An 
> external which can never see aliases (obviously), since that isn't 
> visible outside the running shell process.

   Not obvious, since child processes often inherit the shell symbols 
   of thier parent.  So a shell process starting a separate which is
   likley to pass the existing value of aliases to the process running
   which.