Where am I (csh)

[Mark Komarinski]

Without getting into the "why are you using X to do the job":

I've got a csh script in an arbitrary location.  But I need to know
from within the script where it exists in the directory structure.  The
reason for that is I need to source a file from within that same
directory (where the script is).  If I look for cwd or pwd, I get the
directory my shell was when when I ran the script, not where the
script itself is located.

As an additional condition, I can't use anything on the local system, as
the script will be run over NFS to various systems (hence one of the
reasons it's arbitrary).  And it has to be csh, no tcshisms.

-Mark
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