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+systrace (interactive policy generation for system calls)
+
+Systrace enforces system call policies for applications by constraining
+the application's access to the system. The policy is generated
+interactively. Operations not covered by the policy raise an alarm,
+allowing an user to refine the currently configured policy.
+
+By default, this build includes a GTK+ GUI frontend (gtk-systrace), which
+will be started by systrace as needed. To build without the GUI (e.g. for
+use on headless servers), set GUI=no in the script's environment. In
+this case, you'll have to run systrace with the -t option to prevent it
+trying to start the nonexistant GUI.