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Truncating file with OPENU [message #42342]

Fri, 28 January 2005 12:52

Wayne Landsman
Messages: 117
Registered: January 1997

Senior Member

My question was probably best phrased in this group by Norbert Hahn more
than 10 years ago (without any replies):

**********
Jan 2 1995, 7:34 am
How do I truncate a file without copying the data to another file and
deleting the original ?

I don't have the disk space to hold both copies. OpenU allows to read
and write files but unless I add records the size is not changed.

Thanks for any help
Norbert Hahn

********

There used to be a VMS keyword TRUNCATE_ON_CLOSE to OPENU that would do
what I want: truncate the file at the current file pointer position when
the file was closed. I'd prefer an OS-independent method.

--Thanks --Wayne Landsman

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