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Re: cp doesn't overwrite fifos

From: Mikael Magnusson
Subject: Re: cp doesn't overwrite fifos
Date: Fri, 21 Oct 2005 20:06:59 +0200 (CEST)

On Fri, 21 Oct 2005, Jim Meyering wrote:

Mikael Magnusson <address@hidden> wrote:
I have a file "a" and a fifo "b". Running "cp a b" prompts "cp: overwrite
b?", but answering yes just writes the contents of "a" into the fifo. If

In this particular case, using the gnu-specific --remove-destination
option will make it do what you want.

Ah, i missed that one. What is the advantage of truncating the existing file instead of removing it first? I guess the man page does state that it won't remove existing files when it says existing files are opened with O_WRONLY | O_CREAT, but I didn't realize the implications of this for fifos and hardlinks.

Mikael Magnusson

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