Akom's Tech Ruminations

Various tech outbursts - code and solutions to practical problems

Getting Pidgin to sign off when you lock your screen Linux

Posted by Admin • Wednesday, October 14. 2009 • Category: Linux

I am signed in to google talk from many places - blackberry, laptops, desktops, etc - and every once in a while, IM's don't go to the right one. Since I lock my workstation at the office whenever I get up, I figured it'd be nice to have Pidgin log off at the same time.

I am not sure how you would do this in Windows, but in Linux (Ubuntu in my case), I did it like this:

Changed my screen lock hotkey (Ctrl-Alt-l for me) to run the following:
xlock -startCmd "purple-remote setstatus?status=offline" -endCmd "purple-remote setstatus?status=available"
That's it. If you want specific screensaver modes you can stick them in them too:
xlock -mode blank -startCmd "purple-remote setstatus?status=offline" -endCmd "purple-remote setstatus?status=available"

Update: July 2012

Ubuntu has a broken version of xlock (1:5.31-1) which gets the BadMatch (invalid parameter attributes) error. I switched to using slock from "suckless-tools" package, like so:
bash -c "purple-remote setstatus?status=offline ; slock ; purple-remote setstatus?status=available"

Interestingly, after running slock, xlock works too.. it's actually related to dpms: If you run xset +dpms, xlock will work (once).
You can adjust the xlock version for this bug as follows:
xlock -mode blank -startCmd "xset +dpms ; purple-remote setstatus?status=offline" -endCmd "purple-remote setstatus?status=available"

PS: Doing this in openbox:

<keybind key="C-A-l">
        <action name="Execute">
                <command>xlock -startCmd "purple-remote setstatus?status=offline" -endCmd "purple-remote setstatus?status=available"</command>

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  1. For me the commented solution didn't work so I decided to use the builtin "gnome-screensaver-command" and launch next bash script when Screen Lock:


    Lock Screen + Pidgin On/Off

    bash -c "gnome-screensaver-command --lock" bash -c "purple-remote setstatus?status=offline" while [ "gnome-screensaver-command --query | head -1" = "The screensaver is active" ]; do

    do nothing

    : done

    Put here some commands to run after unlocking..

    bash -c "purple-remote setstatus?status=away"

  2. You might notice one your cores spiking when using this... except you won't since screensaver is on :-) . I'd recommend at least putting a "sleep 1" in your loop. Your script is busywaiting. Additionally, it may be risky to match for the exact string... I'd opt for " | head -1 | grep -i active > /dev/null "

  3. thanks for the advices!

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