Allow to stay on the cwd when started as a daemon

Signed-off-by: Rodrigo Tobar <rtobar@icrar.org>

dfms/manager/cmdline.py

@@ -90,6 +90,8 @@ def addCommonOptions(parser, defaultPort):
                       dest="maxreqsize", help="The maximum allowed HTTP request size, in MB", default=10)
     parser.add_option("-d", "--daemon", action="store_true",
                       dest="daemon", help="Run as daemon", default=False)
+    parser.add_option(      "--cwd", action="store_true",
+                      dest="cwd", help="Stay in the current working directory (when used with -d)", default=False)
     parser.add_option("-s", "--stop", action="store_true",
                       dest="stop", help="Stop an instance running as daemon", default=False)
     parser.add_option("-v", "--verbose", action="count",
@@ -123,7 +125,9 @@ def start(options, parser):
         createDirIfMissing(pidDir)
         pidfile = os.path.join(pidDir,  "dfms%s.pid"    % (options.dmAcronym))
 
-        with daemon.DaemonContext(pidfile=PIDLockFile(pidfile, 1), files_preserve=[fileHandler.stream]):
+        working_dir = '.' if options.cwd else '/'
+        with daemon.DaemonContext(pidfile=PIDLockFile(pidfile, 1), files_preserve=[fileHandler.stream],
+                                  working_directory=working_dir):
             launchServer(options)
 
     # Stop daemon?