[gtk-server] Re: busy loop on startup with fifo method

Quoting Frantisek Dufka <dufkaf@xxxxxxxxx>:


Ah, I see, it is easy then. Or at least in some situations. I was
thinking about killing gtk-server when there is some error or script is
interrupted via ctrl-c. Just tried it and indeed it doesn't work very
good when hitting ctrl+c. When script is waiting inside gtk
"gtk_server_callback WAIT" and I call another gtk "gtk_exit 0" from
trap handler it does not do the right thing (i.e exit gtk server) it
simply prints error and does nothing

./demo-fifo.sh: 1: cannot create /tmp/gtk-server-fifo.2613: Interrupted
system call

In such cases it may be easier to kill gtk-server directly and the
correct PID is in $! after running gtk-server with & so it is easy.
With gtk server forking to background you would need to hunt it down
via ps and grep. This simple code works as expected

end(){
echo "exiting ..."
kill $SERVER_PID
#gtk "gtk_exit 0"
exit
}

trap 'end' SIGINT

# Start gtk-server
./gtk-server fifo=$PIPE log &
SERVER_PID=$!


Thanks for sharing!



Well it could be meant as another optional layer on top of it for
simplifying some frequent tasks. But if it is easy enough then such
layer is not needed and would add unneeded complexity to gtk-server.
Maybe it is easy to merge the sourcecode of Zenity into the GTK-server, as I do not want to reinvent the wheel again :-). As an idea: it could be an option of the 'configure'-script, for example: 

./configure --with-zenity
If you run 'make' then GTK-server is compiled together with the complete functionality of Zenity. I am not sure if this is going to work though, but I will investigate it.
To resume for the FIFO interface, I will put the default behaviour of the GTK-server to backgrounding itself while not eating a 100% CPU (backgrounding is necessary anyway in a script), and I will add the option that the client script can create the FIFO pipe, instead of the GTK-server.
By the way, if you are using BASH, please checkout the 'embedded GTK' concept, which may improve the readability of your code: 

http://www.gtk-server.org/embedded.bash


Regards
Peter

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