[SLUG] Shell test for pure existence of file?

[Harry Ohlsen]

Is there a way in sh or bash to check purely whether a file exists?  All 
of the tests I can find do things like "does it exist *and* is it a 
normal file" or "... *and* is it a directory" or "... *and* is it a 
character special file" etc.

What I'm looking for is the equivalent of the C expression

   access(path, 0) == 0

Thanks in advance,

Harry O.

PS - Worst case, I'll just write a tiny C program, but this is for an 
installation script and I'd prefer to rely purely on standard tools.

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