[no subject]

No, exactly the opposite.  It is a logical "OR", so it only executes
if the test returns false.  If $fn is not a regular file "test -f $fn"
is false, so the other half of the OR needs to be tested.

I've never seen || used the way you use it in your while loop.  I
don't think it works like that.  You have
if [ -f $file1 || file2 ] ...
which means "if file1 is a file or file2".  Note that I didn't write
"if file1 is a file or file2 is a file".  I don't know what it means
to test just a filename.  I think you need multiple -f flags like:
if [ -f $file1 || -f $file2 ] ...

Michael


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