Date: Thu, 27 Feb 2003 00:20:09 +0200 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Tijl Coosemans <tijl@ulyssis.org> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: cat Message-ID: <20030226222009.GB78804@gothmog.gr> In-Reply-To: <20030226175613.5e61f45e.tijl@ulyssis.org> References: <20030226175613.5e61f45e.tijl@ulyssis.org>
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On 2003-02-26 17:56, Tijl Coosemans <tijl@ulyssis.org> wrote: > I want to remove CRs from text files so what I did is this: > > cat filename | tr -d '\r' > filename > > However, I often end up with an empty file. Just out of > interest, somebody who knows why that is? The shell opens filename for input and then attempts to reopen it once more for output, at the same time. The '>' operator truncates the file. You will get much better and more predictable results if you use a temporary file to store the intermediate result of tr(1): $ tr -d '\r' < filename > filename.tmp $ mv filename.tmp filename - Giorgos To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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