Adduser devel - Dec 2005 - Bug#344488: deluser: Strange "Can''t opendir(/proc/9908/task): No such file or directory" message

tags #344488 moreinfo
thanks

On Fri, Dec 23, 2005 at 12:13:13AM +0000, Kai Hendry
wrote:
> Package: deluser
> Version: adduser
> Severity: normal
which version?
> I discovered a user that shouldn''t probably be on the system, so I
> trying to nuke it:
> 
> bible$ sudo deluser --remove-all-files tester
> Looking for files to backup/remove...
> Can''t opendir(/proc/9908/task): No such file or directory
>  at /usr/sbin/deluser line 283
> Removing files...
> Removing user `tester''...
> done.
Can you still see how the /etc/passwd line of that user looked like,
maybe from one of the numerous backups of /etc/passwd?

Greetings
Marc

-- 
-----------------------------------------------------------------------------
Marc Haber         | "I don''t trust Computers. They | Mailadresse
im Header
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Nordisch by Nature |  How to make an American Quilt | Fax: *49 621 72739835

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Bug#344488: deluser: Strange "Can''t opendir(/proc/9908/task): No
such file or directory" message
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> thanks
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On 2005-12-23T08:52+0100 Marc Haber wrote:
> tags #344488 moreinfo
> thanks
> 
> On Fri, Dec 23, 2005 at 12:13:13AM +0000, Kai Hendry wrote:
> > Package: deluser
> > Version: adduser
> > Severity: normal
> 
> which version?
3.80

Something b0rked up with reportbug when I reported this. Sorry.
> > I discovered a user that shouldn''t probably be on the system,
so I
> > trying to nuke it:
> > 
> > bible$ sudo deluser --remove-all-files tester
> > Looking for files to backup/remove...
> > Can''t opendir(/proc/9908/task): No such file or directory
> >  at /usr/sbin/deluser line 283
> > Removing files...
> > Removing user `tester''...
> > done.
> 
> Can you still see how the /etc/passwd line of that user looked like,
> maybe from one of the numerous backups of /etc/passwd?
bible$ sudo egrep test /var/backups/passwd.bak
bible$

Hmmm, I should have done this sooner as I can''t see backup with the
user
tester in it.






I just tried a user ''test'':

bible$ sudo adduser test
Adding user `test''...
Adding new group `test'' (1006).
Adding new user `test'' (1006) with group `test''.
Creating home directory `/home/test''.
Copying files from `/etc/skel''
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for test
Enter the new value, or press ENTER for the default
        Full Name []: test
        Room Number []:
        Work Phone []:
        Home Phone []:
        Other []:
Is the information correct? [y/N] y
bible$ sudo deluser --remove-all-files test
Looking for files to backup/remove...
Can''t opendir(/proc/9908/task): No such file or directory
 at /usr/sbin/deluser line 283
Can''t opendir(/proc/29082/task): No such file or directory
 at /usr/sbin/deluser line 283
Removing files...
Removing user `test''...
done.




Best wishes,

On Fri, Jan 13, 2006 at 02:15:36PM +1100, Kai Hendry
wrote:
> Can''t opendir(/proc/9908/task): No such file or directory
>  at /usr/sbin/deluser line 283
> Can''t opendir(/proc/29082/task): No such file or directory
>  at /usr/sbin/deluser line 283
Are these always these two PIDs, 9908 and 29082? Can you show me the
access rights on the directories in question?

Maybe deluser should not descend into virtual file systems like sysfs,
procfs, devpts and usbfs?

Greetings
Marc

-- 
-----------------------------------------------------------------------------
Marc Haber         | "I don''t trust Computers. They | Mailadresse
im Header
Mannheim, Germany  |  lose things."    Winona Ryder | Fon: *49 621 72739834
Nordisch by Nature |  How to make an American Quilt | Fax: *49 621 72739835

On 2006-01-13T08:31+0100 Marc Haber wrote:
> On Fri, Jan 13, 2006 at 02:15:36PM +1100, Kai Hendry wrote:
> > Can''t opendir(/proc/9908/task): No such file or directory
> >  at /usr/sbin/deluser line 283
> > Can''t opendir(/proc/29082/task): No such file or directory
> >  at /usr/sbin/deluser line 283
> Are these always these two PIDs, 9908 and 29082? Can you show me the
> access rights on the directories in question?
bible$ ls -al /proc/9908/task
ls: /proc/9908/task: No such file or directory
bible$ ls -al /proc/29082/task
ls: /proc/29082/task: No such file or directory


bible$ ls -al /proc/29082
ls: /proc/29082: No such file or directory
bible$ ls -al /proc/9908
ls: cannot read symbolic link /proc/9908/cwd: Permission denied
ls: cannot read symbolic link /proc/9908/root: Permission denied
ls: cannot read symbolic link /proc/9908/exe: Permission denied
total 0
dr-xr-xr-x   3 jo   jo   0 2006-01-15 20:59 .
dr-xr-xr-x 112 root root 0 2005-10-20 19:14 ..
dr-xr-xr-x   2 root root 0 2006-01-15 22:50 attr
-r--------   1 root root 0 2006-01-15 22:50 auxv
-r--r--r--   1 root root 0 2006-01-15 22:50 cmdline
lrwxrwxrwx   1 root root 0 2006-01-15 22:50 cwd
-r--------   1 root root 0 2006-01-15 22:50 environ
lrwxrwxrwx   1 root root 0 2006-01-15 20:59 exe
dr-x------   2 root root 0 2006-01-15 22:50 fd
-r--r--r--   1 root root 0 2006-01-15 22:50 maps
-rw-------   1 root root 0 2006-01-15 22:50 mem
-r--r--r--   1 root root 0 2006-01-15 22:50 mounts
lrwxrwxrwx   1 root root 0 2006-01-15 22:50 root
-r--r--r--   1 root root 0 2006-01-15 22:50 stat
-r--r--r--   1 root root 0 2006-01-15 22:50 statm
-r--r--r--   1 root root 0 2006-01-15 22:50 status
dr-xr-xr-x   3 root root 0 2006-01-15 22:49 task
-r--r--r--   1 root root 0 2006-01-15 22:50 wchan

> Maybe deluser should not descend into virtual file systems like sysfs,
> procfs, devpts and usbfs?
That''s probably just it.

Processing commands for control@bugs.debian.org:
> tags #344488 - moreinfo
Bug#344488: deluser: Strange "Can''t opendir(/proc/9908/task): No
such file or directory" message
Tags were: moreinfo
Tags removed: moreinfo
> retitle #344488 --remove-all-files should not descend into procfs, sysfs et
al
Bug#344488: deluser: Strange "Can''t opendir(/proc/9908/task): No
such file or directory" message
Changed Bug title.
> user adduser@packages.debian.org
Setting user to adduser@packages.debian.org (was
mh+debian-packages@zugschlus.de).
> usertags #344488 joerg-assigned
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Usertags are now: joerg-assigned.
> thanks
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tags #344488 - moreinfo
retitle #344488 --remove-all-files should not descend into procfs, sysfs et al
user adduser@packages.debian.org
usertags #344488 joerg-assigned
thanks

On Mon, Jan 16, 2006 at 09:45:22AM +1100, Kai Hendry
wrote:
> On 2006-01-13T08:31+0100 Marc Haber wrote:
> > Maybe deluser should not descend into virtual file systems like sysfs,
> > procfs, devpts and usbfs?
> 
> That''s probably just it.
Agreed. We''ll have that fixed eventually.

J?rg, imo, we need a config option like "ignore_fstypes" which is
initialized to a regexp like (proc|usbfs|devpts|sysfs). We already
read the output of /sbin/mount to determine a list of the mount
points, so exclusing certain fstypes should be reasonably easy.

Greetings
Marc

-- 
-----------------------------------------------------------------------------
Marc Haber         | "I don''t trust Computers. They | Mailadresse
im Header
Mannheim, Germany  |  lose things."    Winona Ryder | Fon: *49 621 72739834
Nordisch by Nature |  How to make an American Quilt | Fax: *49 621 72739835