Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Message-ID: <003601c1dd93$00693370$0100a8c0@advent02>
From: "Chris January" <chris AT atomice DOT net>
To: <cygwin AT cygwin DOT com>
References: <5 DOT 1 DOT 0 DOT 14 DOT 2 DOT 20020405195515 DOT 026fbb28 AT pop3 DOT cris DOT com> <5 DOT 1 DOT 0 DOT 14 DOT 2 DOT 20020406092736 DOT 0267b5a8 AT pop3 DOT cris DOT com>
Subject: Re: Infinite Loop In "rm -fr" When Busy File Encountered
Date: Sat, 6 Apr 2002 18:46:36 +0100
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000

> > > Greetings,
> > >
> > > I have encountered a problem in "rm" when used with the "-f" and "-r"
> > > options and a busy and hence unremovable file is encountered.
> > >
> > > When "rm -fr" encounters a busy and hence unremovable file, it goes
into an
> > > infinite loop consuming as much CPU time as it can get until it is
forcibly
> > > terminated. The error is completely repeatable as long as the file
remains
> > > busy by virtue of being open in another program.
> > >
> > > The file system is NTFS and the mount is binmode. The system is
Windows
> > > 2000 Pro with SP2 and security patches installed.
> > >
> > > This is an up-to-date Cygwin installation that is exhibiting no other
> > > anomalous behavior.
> > >
> > > In reference to the attached "cygcheck -rs" output, this happened on
"C:"
> > > "/cygdrive/c" (reached via a symlink "/c -> /cygdrive/c").
> >
> >I tried exhaustively to reproduce this (cygwin1.dll v1.3.10), but failed.
>
>
> "Exhaustively?" In such little time?
Oops - exhaustively was the wrong word to use. My apologies!
>
> Please tell me what you tried. I believe when it happened to me the file
> triggering the problem was open for writing.
From memory:
mkdir test
cp test.c test (where test.c is a program that just sleeps in a loop)
cd test
gcc test.c -otest
./test &
cd ..
rm -rf test
mkdir test2
ln -s $PWD/test test2
rm -rf test2
mkdir test2
ln -s $PWD/test test2
rm -rf test2/*
mkdir test/test3
cp test/test test/test3
test/test3/test &
rm -rf test
mkdir test2
ln -s $PWD/test test2
rm -rf test2/test3
mkdir /cygdrive/c/test
cp test/test /cygdrive/c/test
/cygdrive/c/test/test &
rm -rf /cygdrive/c/test
ln -s /cygdrive/c /c
rm -rf /c/test
And maybe some more, I forget.

If it is indeed a bug causing the problem you specified, it probably lies in
delqueue.cc somewhere. If you can reproduce the problem, try running rm
under strace:
strace rm -fr <directory>
>
> Randall Schulz




--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/