Background:
There is a 'xlsclients' utility that is included in the X distribution from
x.org - i.e. the chances that it's installed on computer with X on it are
very high (or we can ship it - it's very small). It lists all clients
connected to the given X server, even remote ones. For example, on my box
running 'xlsclients -la' prints
Window 0xc00001:
Machine: h
Command: /usr/bin/gnome-session
Instance/Class: gnome-session/Gnome-session
Window 0x1c00001:
Machine: h
Command: panel
Instance/Class: panel/Panel
Window 0x2c00001:
Machine: h
Command: gmc
Instance/Class: gmc/Gmc
Window 0x1400001:
Machine: h
Command: gnomepager_applet
Instance/Class: gnomepager_applet/Gnomepager_applet
Window 0x3000001:
Machine: h
Command: quicklaunch_applet
Instance/Class: quicklaunch_applet/Quicklaunch_applet
Window 0x3400001:
Machine: h
Command: gnome-help-browser
Instance/Class: gnome-help-browser/Gnome-help-browser
The instance/class of any gtk-based application could be set with the
following additional arguments:
"--name 'TheName' --class 'TheClassname'"
So, algorithm:
We modify makewrapper.sh and all scripts that generate AbiWord script to add
the following command line options to AW:
--name abiword --class Abiword
Then we check whether AW is running after AbiWord_[ds] process is finished by
using:
xlsclients -l | grep -F "Instance/Class: abiword/Abiword"
The return status is 0 if there are any instances of AW running on the X
display AW was started at.
This will work fine if there are no AWs started using non-upgraded AbiWord
script (i.e. by script that doesn't add "--name abiword --class Abiword" to
the commandline). We can be nice and support this case - we will have to
grep for the following additional things:
"Instance/Class: AbiWord_d/AbiWord_d"
"Instance/Class: AbiWord_s/AbiWord_s"
If xlsclients is not installed, we should assume that either no AWs is
started or provide URL of where sources of it could be acquired from.
Best regards,
-Vlad
