Add script that starts Xephyr, dbus, and metacity for a test user then dumps you to a shell

spawn-test-env.py

@@ -0,0 +1,67 @@
+#!/usr/bin/python -t
+
+import sys, os
+import gtk, gobject
+import pwd
+import types
+
+def change_user(user):
+	try:
+		pwrec = pwd.getpwnam(user)
+	except KeyError:
+		raise Exception("Username '%s' does not exist." % user)
+	uid = pwrec[2]
+	os.setuid(uid)
+	return pwrec[6]
+
+def shell_watch_cb(pid, condition, user_data=None):
+	print "In shell watch callback."
+	gtk.main_quit()
+
+def main():
+	if len(sys.argv) < 1:
+		print "Usage: %s <test user>" % sys.argv[0]
+	user = sys.argv[1]
+
+	# Start Xephyr
+	DISPLAY = ":10"
+	args = "/usr/bin/Xephyr -ac -host-cursor -screen 800x600 %s" % DISPLAY
+	args = args.split()
+	(xephyr_pid, ign1, ign2, ign3) = gobject.spawn_async(args, flags=gobject.SPAWN_STDERR_TO_DEV_NULL | gobject.SPAWN_STDOUT_TO_DEV_NULL)
+	print "Xepyhr pid is %d" % xephyr_pid
+
+	shell = change_user(user)
+
+	args = "/bin/dbus-daemon --session --print-address".split()
+	(dbus_pid, ign1, dbus_stdout, ign3) = gobject.spawn_async(args, flags=gobject.SPAWN_STDERR_TO_DEV_NULL, standard_output=True)
+	dbus_file = os.fdopen(dbus_stdout)
+	addr = dbus_file.readline()
+	addr = addr.strip()
+	print "dbus-daemon pid is %d, session bus address is %s" % (dbus_pid, addr)	
+	dbus_file.close()
+
+	os.environ["DISPLAY"] = DISPLAY
+	os.environ["DBUS_SESSION_BUS_ADDRESS"] = addr
+
+	args = "/usr/bin/metacity"
+	(metacity_pid, ign1, ign2, ign3) = gobject.spawn_async([args], flags=gobject.SPAWN_STDERR_TO_DEV_NULL | gobject.SPAWN_STDOUT_TO_DEV_NULL)
+
+	print "\n"
+	(shell_pid, ign1, ign2, ign3) = gobject.spawn_async([shell], flags=gobject.SPAWN_LEAVE_DESCRIPTORS_OPEN | gobject.SPAWN_CHILD_INHERITS_STDIN | gobject.SPAWN_DO_NOT_REAP_CHILD)
+	gobject.child_watch_add(shell_pid, shell_watch_cb)
+	try:
+		gtk.main()
+	except KeyboardInterrupt:
+		pass
+
+	try:
+		os.kill(dbus_pid, 9)
+	except OSError:
+		pass
+	try:
+		os.kill(metacity_pid, 9)
+	except OSError:
+		pass
+
+if __name__ == "__main__":
+	main()