I am new to POSIX.  I am trying to write a cgi routine that is run by
APACHE.  This cgi routine needs to open my image database.  However I don't
know how to tell it where the database is.  If I was running under the CI
shell, then I would simply do the following:

:file mydatadb=mydatadb.group.acct
:run mypgm

however when I am in POSIX, I know I can issue the command

Schell-iX>./mypgm

but it doesn't know where to look for my database.

How can I tell it where to look?