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import os
import subprocess
from devbot import utils
def _find_free_display():
for i in range(100, 1000):
display = ":%s" % i
result = subprocess.call(args=["xdpyinfo", "--display", display],
stdout=utils.devnull,
stderr=subprocess.STDOUT)
if result > 0:
return display
def start():
xvfb_display = _find_free_display()
xvfb_proc = subprocess.Popen(args=["Xvfb", xvfb_display],
stdout=utils.devnull,
stderr=subprocess.STDOUT)
orig_display = os.environ.get("DISPLAY", None)
os.environ["DISPLAY"] = xvfb_display
return (xvfb_proc, orig_display)
def stop(xvfb_proc, orig_display):
if orig_display is not None:
os.environ["DISPLAY"] = orig_display
xvfb_proc.terminate()
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