gnome-shell/scripts/start-in-Xephyr

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#!/usr/bin/python
import os,sys,subprocess,signal
import random
import shutil
import tempfile
import time
# Uninstalled paths
scripts_dir = os.path.dirname(os.path.abspath(sys.argv[0]))
top_dir = os.path.dirname(scripts_dir)
plugin_dir = os.path.join(top_dir, "src")
plugin = os.path.join(plugin_dir, "libgnome-shell.la")
js_dir = os.path.join(top_dir, "js")
tmpdir = tempfile.mkdtemp("", "gnome-shell.")
try:
display = ":" + str(random.randint(10, 99))
xauth_file = os.path.join(tmpdir, "database")
# Create a random 128-byte key and format it as hex
f = open("/dev/urandom", "r")
key = f.read(16)
f.close()
hexkey = "".join(("%02x" % ord(byte) for byte in key))
# Store that in an xauthority file as the key for connecting to our Xephyr
os.environ['XAUTHORITY'] = xauth_file
retcode = subprocess.call(["xauth", "add", display, "MIT-MAGIC-COOKIE-1", hexkey])
if retcode != 0:
raise RuntimeError("xauth failed")
# Launch Xephyr
xephyr = subprocess.Popen(["Xephyr", display, "-screen", "800x600", "-host-cursor"])
os.environ['DISPLAY'] = display
# Wait for server to get going: LAME
time.sleep(1)
# Start xterm to have some window in our session
subprocess.Popen(["xterm"])
# Now launch metacity-clutter with our plugin
env=dict(os.environ)
env.update({'GNOME_SHELL_JS' : js_dir,
'GI_TYPELIB_PATH' : plugin_dir,
'LD_LIBRARY_PATH' : os.environ.get('LD_LIBRARY_PATH', '') + ':' + plugin_dir})
args = 'DEBUG' in os.environ and os.environ['DEBUG'].split() or []
args.extend(['metacity', '--mutter-plugins=' + plugin, '--replace'])
print args
subprocess.Popen(args, env=env)
# Wait for Xephyr to exit
try:
retcode = xephyr.wait()
except KeyboardInterrupt, e:
os.kill(xephyr.pid, signal.SIGKILL)
finally:
shutil.rmtree(tmpdir)