[teisenbe] first attempt at a plugin system.

1 files changed, 45 insertions, 0 deletions

diff --git a/plugins/screen_detach.py b/plugins/screen_detach.py
new file mode 100644
index 00000000..6ebc77f2
--- /dev/null
+++ b/plugins/screen_detach.py
@@ -0,0 +1,45 @@
+import os
+import stat
+import pyinotify
+
+SCREEN_DIR = '/var/run/screen/S-%s' % (os.getlogin(),)
+
+class Plugin(BasePlugin):
+    def init(self):
+        self.timed_event = None
+        sock_path = None
+        self.thread = None
+        for f in os.listdir(SCREEN_DIR):
+            path = os.path.join(SCREEN_DIR, f)
+            if screen_attached(path):
+                sock_path = path
+                self.attached = True
+                break
+
+        # Only actually do something if we found an attached screen (assuming only one)
+        if sock_path:
+            wm = pyinotify.WatchManager()
+            wm.add_watch(sock_path, pyinotify.EventsCodes.ALL_FLAGS['IN_ATTRIB'])
+            self.thread = pyinotify.ThreadedNotifier(wm, default_proc_fun=HandleScreen(plugin=self))
+            self.thread.start()
+
+    def cleanup(self):
+        if self.thread:
+            self.thread.stop()
+
+    def update_screen_state(self, socket):
+        attached = screen_attached(socket)
+        if attached != self.attached:
+            self.attached = attached
+            status = 'available' if self.attached else 'away'
+            self.core.command_status(status)
+
+def screen_attached(socket):
+    return (os.stat(socket).st_mode & stat.S_IXUSR) != 0
+
+class HandleScreen(pyinotify.ProcessEvent):
+    def my_init(self, **kwargs):
+        self.plugin = kwargs['plugin']
+
+    def process_IN_ATTRIB(self, event):
+        self.plugin.update_screen_state(event.path)