<NME> graphical-app-launcher.py
<BEF> #!/usr/bin/env python

import os
import subprocess
import time
import sys
import signal

if __name__ == '__main__':
    if os.environ.has_key('APP'):
        graphical_app = os.environ['APP']
        if os.environ.has_key('ARGS'):
            extra_args = os.environ['ARGS']
            command = graphical_app + ' ' + extra_args
        else:
            command = graphical_app

        process = subprocess.Popen(command, shell=True,
                                   stdout=subprocess.PIPE, stderr=subprocess.STDOUT)

        def print_return_code_and_shutdown(return_code):
            for line in process.stdout.readlines():
                sys.stdout.write(line)
            with open('/tmp/graphical-app.return_code', 'w') as fp:
                fp.write(str(return_code))
            subprocess.call(['sudo', 'supervisorctl', 'shutdown'],
                            stdout=subprocess.PIPE)
            sys.exit(return_code)

        def signal_handler(signum, frame):
            print_return_code_and_shutdown(128 + signum)
        signal.signal(signal.SIGTERM, signal_handler)

        while(process.poll() == None):
            for line in process.stdout.readlines():
                sys.stdout.write(line)
            time.sleep(1)

        print_return_code_and_shutdown(process.returncode)

<MSG> Update graphical-app-launcher to allow continuous update of "graphical-app-launcher.log"

<DFF> @@ -31,9 +31,12 @@ if __name__ == '__main__':
             print_return_code_and_shutdown(128 + signum)
         signal.signal(signal.SIGTERM, signal_handler)
 
-        while(process.poll() == None):
-            for line in process.stdout.readlines():
-                sys.stdout.write(line)
-            time.sleep(1)
+        while True:
+            output = process.stdout.readline()
+            if sys.version_info[0] >= 3:
+                output = output.decode()
+            if output == '' and process.poll() is not None:
+                break
+            print(output.rstrip())
 
         print_return_code_and_shutdown(process.returncode)

Update graphical-app-launcher to allow continuous update of "graphical-app-launcher.log"