This should be a Unix question, I don't know how to do this, but maybe you can use Mutex to do this. >man mutex will give you detail information. -----Original Message----- From: gtk-list-admin@xxxxxxxxx [mailto:gtk-list-admin@xxxxxxxxx] On Behalf Of Joao Rainha Sent: Thursday, October 30, 2003 12:47 PM To: gtk-list@xxxxxxxxx Subject: Check for instances running Hi! I want to check if there's other instances of a GTK program running. 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? Thanks -- Regards, João Rainha _______________________________________________ gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list _______________________________________________ gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list