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From: Walter Hofmann <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: /usr/bin/du: du can't count
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Date: Mon, 03 May 2004 15:13:17 +0200
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Package: coreutils
Version: 5.0.91-2
Severity: normal
File: /usr/bin/du
du displays the wrong size for the directory after /proc when called with
multiple
directories as arguments.
Look at the example below. /root has around 3MB, but du says it has 773 when
/proc is
immediately before /root in the command line. This also works with other
directories;
du will display 770MB more than the directory actually has.
Incidently, 770MB is approximately the amount of memory in my computer. The
largest
file in /proc is /proc/kcore with 768MB. It seems that du doesn't reset its
counter when
it fails in /proc and continues in /root.
Also, the error message is wrong, proc DOES exist.
The error doesn't depend on the -x or -m switch.
[EMAIL PROTECTED]:/# du -smx root
3 root
[EMAIL PROTECTED]:/# du -smx proc root
du: `proc': No such file or directory
773 root
[EMAIL PROTECTED]:/# du -smx idontexist root
du: `idontexist': No such file or directory
3 root
[EMAIL PROTECTED]:/# ll -d root proc idontexist
ls: idontexist: No such file or directory
dr-xr-xr-x 154 root root 0 May 3 00:53 proc
drwxr-xr-x 23 root root 4096 May 3 14:41 root
[EMAIL PROTECTED]:/# mount
/dev/hda3 on / type ext3 (rw)
proc on /proc type proc (rw)
An strace of "du -smx proc root" shows that du is actually scanning /proc,
and fails when it tries to open /proc/4275/task/ which is listed but doesn't
exist:
[EMAIL PROTECTED]:/# ll /proc/4275/
ls: cannot read symbolic link /proc/4275/cwd: No such file or directory
ls: cannot read symbolic link /proc/4275/root: No such file or directory
ls: cannot read symbolic link /proc/4275/exe: No such file or directory
total 0
-r-------- 1 root root 0 May 3 15:09 auxv
-r--r--r-- 1 root root 0 May 3 15:07 cmdline
lrwxrwxrwx 1 root root 0 May 3 15:09 cwd
-r-------- 1 root root 0 May 3 15:09 environ
lrwxrwxrwx 1 root root 0 May 3 15:09 exe
dr-x------ 2 root root 0 May 3 15:09 fd
-r--r--r-- 1 root root 0 May 3 15:09 maps
-rw------- 1 root root 0 May 3 15:09 mem
-r--r--r-- 1 root root 0 May 3 15:09 mounts
lrwxrwxrwx 1 root root 0 May 3 15:09 root
-r--r--r-- 1 root root 0 May 3 15:07 stat
-r--r--r-- 1 root root 0 May 3 15:09 statm
-r--r--r-- 1 root root 0 May 3 15:07 status
dr-xr-xr-x 3 root root 0 May 3 14:51 task
-r--r--r-- 1 root root 0 May 3 15:09 wchan
[EMAIL PROTECTED]:/# ll /proc/4275/task/
ls: /proc/4275/task/: No such file or directory
4275 is the pid of a zombie process.
Weird bug, but annoying because it makes "du -smx /*" unreliable.
-- System Information:
Debian Release: testing/unstable
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.3
Locale: LANG=C, LC_CTYPE=C (ignored: LC_ALL set to [EMAIL PROTECTED])
Versions of packages coreutils depends on:
ii libacl1 2.2.23-1 Access control list shared library
ii libattr1 2.4.16-1 Extended attribute shared library
ii libc6 2.3.2.ds1-12 GNU C Library: Shared libraries an
-- no debconf information
---------------------------------------
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Date: Sat, 3 Dec 2005 10:35:35 -0700
To: Peter Eisentraut <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
Subject: Re: Bug#247131: /usr/bin/du: du can't count
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From: [EMAIL PROTECTED] (Bob Proulx)
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Walter Hofmann wrote:
> du displays the wrong size for the directory after /proc when called
> with multiple directories as arguments.
Jim Meyering wrote:
> Thank you for the fine bug report.
> FYI, since then, du has undergone a major overhaul.
> That bug is fixed upstream...[in 5.2.1]
Peter Eisentraut wrote:
> I verified that this is fixed in 5.2.1.
Thanks for doing that work and verifying the fix. I agree. I am
closing the bug.
Bob
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