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Re: Files created with emacs are owned by system
From: |
Tim X |
Subject: |
Re: Files created with emacs are owned by system |
Date: |
Sat, 02 Aug 2008 11:54:31 +1000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux) |
iainb.forms@googlemail.com writes:
> On Aug 1, 3:33 pm, Joost Kremers <joostkrem...@yahoo.com> wrote:
>> iainb.fo...@googlemail.com wrote:
>> > 3. GNU Emacs 21.2.1
>> [...]
>> > 8. emacs -Q: unknown option; I also can't find it in the man page.
>>
>> -Q is a fairly new option. perhaps it was only introduced with emacs 22.
>>
>> > Most importantly, (probably) it does seem that emacs is running as
>> > root
>> > ps -aux | grep emacs:
>> > root 1805 0.0 -0.2 48104 4548 p2 S+ 7:38PM 0:00.36
>> > emacs
>>
>> > I have no idea why it's doing this or how to change it. If I quit
>> > emacs and while in the same terminal run "whoami", I'm still iainb.
>>
>> do:
>>
>> ls -l $(which emacs)
>>
>> i'm suspecting that your permissions will be set to 'rws' for the owner,
>> meaning that the binary is suid (i.e. it runs as the owner of the file, in
>> this case root, not as the user that's actually started the process.)
>>
>> --
>> Joost Kremers joostkrem...@yahoo.com
>> Selbst in die Unterwelt dringt durch Spalten Licht
>> EN:SiS(9)
>
> well, I've installed emacs version 22.2 into /usr/local and it doesn't
> save the files as root, it saves them as me.
>
> For the record
> ls -l /usr/local/bin/emacs
> -rwxr-xr-t 2 root wheel 9673784 Aug 1 15:36 /usr/local/bin/emacs
>
> ls -l /usr/bin/emacs
> -r-sr-xr-x 1 root wheel 30008 Aug 19 2006 /usr/bin/emacs
>
There is your problem. Emacs has the setuid bit set. this means it will
execute as the owner, which is root.
While switching to a new version as worked around your problem, I would
be rther concerned about this. It would be extremely unusual to have
emacs installed with the setuid bit set. I would certainly be checking
to see what other binaries have this set and would immediately
consider the system has been compromised. If you find many files with
the setuid bit set, I would strongly recommend a re-install.
Tim
--
tcross (at) rapttech dot com dot au
- Re: Files created with emacs are owned by system, (continued)
- Re: Files created with emacs are owned by system, Joost Kremers, 2008/08/01
- Re: Files created with emacs are owned by system, Peter Dyballa, 2008/08/01
- Message not available
- Re: Files created with emacs are owned by system, David Kastrup, 2008/08/01
- Re: Files created with emacs are owned by system, Peter Dyballa, 2008/08/01
- Re: Files created with emacs are owned by system, iainb . forms, 2008/08/02
- Re: Files created with emacs are owned by system, Mark Hood, 2008/08/06
- Message not available
- Re: Files created with emacs are owned by system, Joost Kremers, 2008/08/01
- Re: Files created with emacs are owned by system,
Tim X <=
- Message not available
- Re: Files created with emacs are owned by system, D. Power, 2008/08/02
- Re: Files created with emacs are owned by system, Peter Dyballa, 2008/08/01
- Re: Files created with emacs are owned by system, Tim X, 2008/08/01
- Re: Files created with emacs are owned by system, Tim X, 2008/08/01
- Message not available
- Re: Files created with emacs are owned by system, iainb . forms, 2008/08/01
- Re: Files created with emacs are owned by system, Joost Kremers, 2008/08/01
- Re: Files created with emacs are owned by system, Peter Dyballa, 2008/08/01
- Re: Files created with emacs are owned by system, Tim X, 2008/08/01