Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ames!mailrus!tut.cis.ohio-state.edu!rutgers!bellcore!tness7!ninja!cpe!tif
From: tif@cpe.UUCP
Newsgroups: comp.unix.xenix
Subject: Re: truncating open files in C under Xe
Message-ID: <6800035@cpe>
Date: 15 Sep 88 23:19:00 GMT
References: <13571@mimsy.UUCP>
Lines: 17
Nf-ID: #R:mimsy.UUCP:13571:cpe:6800035:000:804
Nf-From: cpe.UUCP!tif    Sep 15 18:19:00 1988


Written  2:15 am  Sep 15, 1988 by mimsy.UUCP!chris in cpe:comp.unix.xenix
>In article <171@uniblab.UUCP> al@uniblab.UUCP (alan krantz) asks:
>>If i have an open file and want to set that files length
>>to zero, do i have to close the file and reopen it?
>In article <12175@oberon.USC.EDU> english@stromboli.usc.edu (Joe English)
>>Can't be done; you do have to close() and re- creat() or 
>>open(... | O_TRUNC).
>Well, actually, while you do have to call creat, or open with O_TRUNC,
>you need not close the file.  (If you have 4.2BSD or something later,
>you can use ftrucate, but then the Subject line did say `Xenix'.)

Isn't chsize() a standard function?  It's in Xenix's library as well
as MS-DOS's.

			Paul Chamberlain
			Computer Product Engineering, Tandy Corp.
			{convex,killer}!ninja!cpe!tif