On Wednesday 02 April 2003 23:45, Oswald Buddenhagen wrote:
> On Wed, Apr 02, 2003 at 08:29:16PM +0000, David Pye wrote:
> > However, I'm not sure how you
> > can find out which one is currently being displayed.
> >
> oh, right, i forgot that part. fgconsole. but this works only as root,
> so you need to define a sudo rule if a regular user should be able to
> execute it. alternatively you can make it suid root, but somehow i doubt
> that this is a good idea.
Great one peace more of the puzzle. Here fgconsole works also for normal user:
[EMAIL PROTECTED](0) ~ $ fgconsole
7
[EMAIL PROTECTED](2) ~ $ whoami
ach
fgconsole return error code 2. Strange but it does the same for root.
Looks like Xserver does not change the tty<n>:
(vt7,8 are kdm managed displays, vt12 is used by X -query ...):
[EMAIL PROTECTED](0) ~ $ l -L /dev/tty{[1-9],1{0,1,2}}
crw------- 1 root root 4, 1 Mar 31 10:51 /dev/tty1
crw-rw-rw- 1 root tty 4, 10 Jan 1 1970 /dev/tty10
crw-rw-rw- 1 root tty 4, 11 Jan 1 1970 /dev/tty11
crw-rw-rw- 1 root root 4, 12 Jan 1 1970 /dev/tty12
crw------- 1 root root 4, 2 Mar 17 17:20 /dev/tty2
crw------- 1 root root 4, 3 Mar 17 17:20 /dev/tty3
crw------- 1 root root 4, 4 Mar 17 17:20 /dev/tty4
crw------- 1 root root 4, 5 Mar 17 17:20 /dev/tty5
crw------- 1 root root 4, 6 Mar 17 17:20 /dev/tty6
crw-rw-rw- 1 root root 4, 7 Jan 1 1970 /dev/tty7
crw-rw-rw- 1 root root 4, 8 Jan 1 1970 /dev/tty8
crw-rw-rw- 1 root root 4, 9 Jan 1 1970 /dev/tty9
It this a (security) bug? I've tried
echo some garbage > /dev/tty8
but :1 (on vt8) is still working.
Back on topic ;) Missing is now vt# -> display#. I hacked this little
script. Anyone care to test? Works here(tm). (Better methods that
work with {k,g,w,x}dm etc welcome.)
#!/bin/bash
vtnum=`fgconsole`
match=`grep -l " using VT number $vtnum$" /var/log/XFree86.*.log`
if [ "$match" ]; then
display="${match#/var/log/XFree86.}"
display="${display%.log}"
user="`who | grep " :$display " | awk '{print $1}'`"
echo display=:$display
echo user=$user
# groups $user | grep -q camera && exec su - $user "DISPLAY="$display"
exec digikam
exit 0
else
exit 1
fi
Thx for all the help,
Achim
>
> greetings
>
>
> --
> Hi! I'm a .signature virus! Copy me into your ~/.signature, please!
> --
> Chaos, panic, and disorder - my work here is done.
--
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