I'm doing a kind of a lock file, where i keep the process pid, and at the beginning of the program, i check i the file exist and if the pid is a valid process.
Is this the best way to do it? Are there any better method, like specific gtk or glib functions?
You also need to keep the client/server nature of X in mind. You may have several instances running on the same display but on different hosts, and/or several instances running on the same host but on different displays.
-- Christer Palm
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