looking for info on builtin hashing of command in csh

[Timothy H Smith]

hello..

	Im looking for a very specific reference of how the builtin
hash function for csh works.  I need specific info on how that hash
funtion works in that is does not have to search the (path) for
the location of a command (executable +x) file. 
I am able to creat a new executable file and csh will find it, but
if a move a file to a different location csh cannot find it.  I then
have to do a rehash.

I believe that csh looks at the location of where it thinks the
file is in it's hash table,  and when it's not there it complanes.
Is this true?  How does it know the difference between a newly 
created file and one not in its hash table.  Does csh check that path
if the named executable is not in its table?

				thanks for any help

				tim at vax1.cc.uakron.edu