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Date: Fri, 30 Apr 1999 10:46:14 -0400
From: Eugene Kanter <eugene AT bgs DOT com>
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CC: cygwin AT sourceware DOT cygnus DOT com
Subject: Re: tail -f <file name> locks <file name>
References: <19990430143752 DOT 22109 DOT rocketmail AT web118 DOT yahoomail DOT com>
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Earnie Boyd wrote:
> 
> --- Eugene Kanter <eugene AT bgs DOT com> wrote:
> --8<--
> > Here is an example:
> >
> > bash window 1:                     bash window 2:
> > bash-2.02$ touch  mappfile.out
> > bash-2.02$ tail -f  mappfile.out   bash $ cat > mappfile.out
> > line1                              line1
> > line2                              line2
> >                                    ^C
> >                                    bash $ rm mappfile.out
> >                                    bash $ ls mappfile.out
> >                                    ls: mappfile.out: No such file or
> > directory
> >                                    bash $ cat > mappfile.out
> >                                    bash: mappfile.out: Permission denied
> >
> > Is this enough for you to reproduce it?
> 
> The rm of mappfile.out in the bash 2 window has not actually removed it yet as
> it is still open in the bash 1 window.  Cygwin has marked it in a table to be
> removed when it gets closed but it's really not gone yet.  You then try to
> create the file and the filesystem complains that it can't get rid of
> mappfile.out because another process has it open so you get the "Permission
> denied" error.  This is a feature of the MS OSes.

Is there a way to overcome this "feature of the MS OSes"?

Is there any other "tail" which does not cause this error? 

Eugene.

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