Debian Bug report logs - #47678
No way to see which processes are using a block device file

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Robert Woodcock <rcw@frantica.lly.org>

To: submit@bugs.debian.org

Subject: psmisc: fuser thinks entire world is accessing cdrom drive

Date: Sun, 17 Oct 1999 15:05:43 -0700

Package: psmisc
Version: 18-3
Severity: normal

Hello, recently the sg module on my system stuffed up a bit (open() calls to
/dev/sg5 never returned) so I went to remove it, however a bunch of
processes were using it.

I really don't know if fuser is just the messenger or if it's buggy, but
when I used fuser -km /dev/sg5 on my system it immediately killed every
login shell, sshd, gpm, inetd, squid, apache, and pppd, and would have gone
after init had it responded to SIGKILL.

I checked fuser -mv /dev/sg5 after the fact and to my surprise the list of
things using /dev/sg5 was a bit larger than I originally thought. Checking
it again, we see that even the current copy of 'bug' is in there.

frantica:~$ fuser -mv /dev/sg5

                     USER        PID ACCESS COMMAND
/dev/sg5             root          1 ....m  init
                     rcw       28022 frce.  bash
                     rcw       28024 frce.  bash
                     rcw       28025 frce.  bash
                     rcw       28026 frce.  bash
                     rcw       28027 frce.  bash
                     rcw       28028 frce.  bash
                     rcw       28029 frce.  bash
                     root      28030 ....m  getty
                     root      28031 ....m  getty
                     rcw       28032 frce.  bash
                     rcw       28033 frce.  bash
                     rcw       28034 frce.  bash
                     root      28035 ....m  getty
                     root      28036 ....m  getty
                     root      28037 ....m  getty
                     root      28038 ....m  getty
                     root      28039 ....m  getty
                     rcw       28040 frce.  bash
                     root      28083 ....m  sshd
                     root      28084 ....m  sshd
                     ares      28086 ....m  bash
                     root      28263 ....m  ssh
                     root      28269 ....m  ssh
                     rcw       28275 frce.  bash
                     root      28341 ....m  pppd
                     root      28347 ....m  gpm
                     rcw       28396 frce.  irc
                     rcw       28562 frce.  bug
                     rcw       28589 frce.  joe
                     rcw       28590 fr.e.  fuser
                     root     kernel mount  /boot
                     root     kernel mount  /debian
                     root     kernel mount  /cdtmp

Please reassign this bug as you see fit if it is indeed an init or kernel
issue. Thanks.

-- System Information
Debian Release: potato
Kernel Version: Linux frantica 2.2.11 #1 Wed Aug 18 12:02:27 PDT 1999 i686 unknown

Versions of the packages psmisc depends on:
ii  libc6           2.1.2-5        GNU C Library: Shared libraries and timezone
ii  libncurses4     4.2-3.4        Shared libraries for terminal handling

Message #10 received at 47678@bugs.debian.org (full text, mbox, reply):

From: Craig Small <csmall@scooter.eye-net.com.au>

To: Robert Woodcock <rcw@frantica.lly.org>, 47678@bugs.debian.org

Subject: Re: Bug#47678: psmisc: fuser thinks entire world is accessing cdrom drive

Date: Wed, 20 Oct 1999 13:27:42 +1000 (EST)

Robert Woodcock said:
> Hello, recently the sg module on my system stuffed up a bit (open() calls to
> /dev/sg5 never returned) so I went to remove it, however a bunch of
> processes were using it.
> 
> I really don't know if fuser is just the messenger or if it's buggy, but
> when I used fuser -km /dev/sg5 on my system it immediately killed every
> login shell, sshd, gpm, inetd, squid, apache, and pppd, and would have gone
> after init had it responded to SIGKILL.
> 
> I checked fuser -mv /dev/sg5 after the fact and to my surprise the list of
> things using /dev/sg5 was a bit larger than I originally thought. Checking
> it again, we see that even the current copy of 'bug' is in there.

Most very important, was /dev/sg5 mounted at the time?  If not then it
thinks you mean /

  - Craig


-- 
Craig Small VK2XLZ, PGP: AD 8D D8 63 6E BF C3 C7  47 41 B1 A2 1F 46 EC 90
Eye-Net Consulting http://www.eye-net.com.au/     <csmall@eye-net.com.au>
MIEEE <csmall@ieee.org>              Debian developer <csmall@debian.org>

Message #15 received at 47678@bugs.debian.org (full text, mbox, reply):

From: Robert Woodcock <rcw@debian.org>

To: Craig Small <csmall@scooter.eye-net.com.au>

Cc: 47678@bugs.debian.org

Subject: Re: Bug#47678: psmisc: fuser thinks entire world is accessing cdrom drive

Date: Tue, 19 Oct 1999 20:47:47 -0700

On Wed, Oct 20, 1999 at 01:27:42PM +1000, Craig Small wrote:
> Robert Woodcock said:
> > Hello, recently the sg module on my system stuffed up a bit (open() calls to
> > /dev/sg5 never returned) so I went to remove it, however a bunch of
> > processes were using it.
> > 
> > I really don't know if fuser is just the messenger or if it's buggy, but
> > when I used fuser -km /dev/sg5 on my system it immediately killed every
> > login shell, sshd, gpm, inetd, squid, apache, and pppd, and would have gone
> > after init had it responded to SIGKILL.
> > 
> > I checked fuser -mv /dev/sg5 after the fact and to my surprise the list of
> > things using /dev/sg5 was a bit larger than I originally thought. Checking
> > it again, we see that even the current copy of 'bug' is in there.
> 
> Most very important, was /dev/sg5 mounted at the time?

No.

> If not then it thinks you mean /

Is there a way around this?
-- 
Robert Woodcock - rcw@debian.org
"Hacking... is a completely creepy thing to do." -- US Department Of Justice

Message #24 received at 47678-done@bugs.debian.org (full text, mbox, reply):

From: Craig Small <csmall@debian.org>

To: 47678-done@bugs.debian.org

Subject: Fixed with fuser rewrite

Date: Sun, 4 Nov 2007 17:13:21 +1100

Package: fuser
Version: 21.7

fuser was completely re-written in this version, which was released
years ago.  I just never noticed this bug and what it was, sorry for
the delay but it would of been fixed a while ago now.

 - Craig
-- 
Craig Small      GnuPG:1C1B D893 1418 2AF4 45EE  95CB C76C E5AC 12CA DFA5
http://www.enc.com.au/                             csmall at : enc.com.au
http://www.debian.org/          Debian GNU/Linux, software should be Free 

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