shell commands to know everything about Virtual Consoles ?

[theYinYeti]

I started programming something in bash, that's using consoles a lot.

So far:

- I know how many text consoles were created at boot (grep ... /etc/inittab).

- I know how many X consoles are opened (find /tmp ...).

- I know who is logged (if any) on each text console (who | grep ...).

 

Is there a way to know:

- Who is logged on each X console ?

- What console (its number) is currently on screen ?

- What "root-program" is running on each console (text login, X (display number ? who ?), framebuffer) ?

 

Yves.

[aru]

I started programming something in bash, that's using consoles a lot.

So far:

- I know how many text consoles were created at boot (grep ... /etc/inittab).

- I know how many X consoles are opened (find /tmp ...).

- I know who is logged (if any) on each text console (who | grep ...).

 

Is there a way to know:

- Who is logged on each X console ?

- What console (its number) is currently on screen ?

- What "root-program" is running on each console (text login, X (display number ? who ?), framebuffer) ?

 

Yves.

 

the 'w' command doesn't show you most of what you want? probably I'm missunderstanding your question, but anyway, here is an example of output

 

[root@neo tmp]# w

12:22:27 up  9:44,  4 users,  load average: 0,00, 0,02, 0,00

USER     TTY        LOGIN@   IDLE   JCPU   PCPU WHAT

aru      vc/1      00:39   22:30   0.02s  0.02s -bash

root     vc/2      12:20    1:49   0.02s  0.02s -bash

aru      vc/3      12:21    1:08   0.10s  0.00s /bin/sh /usr/X11R6/bin/startx icewm -- :1

aru      :0         10:46   ?xdm?   1:22   0.45s fluxbox

[root@neo tmp]#

 

Maybe you want a deeper info about what is doing a given user, so probably you can extract almost all the info of each of the proccesses he is running from /proc/#pid/environ for each pid of his jobs.

 

Please, tell me if I'm missunderstanding your question because I find it really interesting.

[theYinYeti]

Thanks aru. I'll look at this "w" thing. I think you didn't misunderstand. I simply did not know this command (so small it escaped my scrutiny :-)).

 

But I don't intend to spy on the users, so I don't need too much detail.

 

What I want is to offer possibilities like:

1- lock current console

2- lock the whole computer

 

For 1, I need to:

- detect the current console's number,

- detect the console's type

- if it is X, then xscreensaver

- if it is text, then ??? (I don't know how to lock/unlock a text console)

- else nothing (can anything be done...?)

 

For 2, I need to:

- list all the currently opened consoles

- do the same as above (except first step of course) for each console.

 

Yves.

[aru]

What I want is to offer possibilities like:

1- lock current console

2- lock the whole computer

 

For 1, I need to:

- detect the current console's number,

Don't know how, but if I've got some time I'll look to it

 

- detect the console's type

Probably if you find the former you'll get this one easily

- if it is X, then xscreensaver

- if it is text, then ??? (I don't know how to lock/unlock a text console)

/usr/bin/vlock

vlock (1) - Virtual Console lock program

 

~$ urpmq -f vlock

vlock-1.3-12mdk.i586

 

For 2, I need to:

- list all the currently opened consoles

- do the same as above (except first step of course) for each console.

'w' would list all opened consoles, but you can lock all of them directly:

 

To lock all the VC do:

~# vlock -a

 

For the X sessions; I guess that I'll do something like:

~# for display in $(ls /tmp/.X*-lock); do

> DISP=":$(echo ${display}|sed "s/.*X([0-9*])-.*/1/")"; 

> xscreensaver-command -lock -display $DISP; 

> done

 

...or w/o using sed:

~# for display in $(ls /tmp/.X*-lock); do

> DISP=":${display##*X}";

> xscreensaver-command -lock -display ${DISP%%-*};

> done;

 

 

HTH

 

PS: If you finally write a script or a couple to handle this I'll be glad to see them, It could be very useful ;)