diff hgext/inotify/linux/__init__.py @ 6239:39cfcef4f463

Add inotify extension

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hgext/inotify/linux/__init__.py	Wed Mar 12 15:30:11 2008 -0700
@@ -0,0 +1,41 @@
+# __init__.py - low-level interfaces to the Linux inotify subsystem
+
+# Copyright 2006 Bryan O'Sullivan <[e-mail]>
+
+# This library is free software; you can redistribute it and/or modify
+# it under the terms of version 2.1 of the GNU Lesser General Public
+# License, incorporated herein by reference.
+
+'''Low-level interface to the Linux inotify subsystem.
+
+The inotify subsystem provides an efficient mechanism for file status
+monitoring and change notification.
+
+This package provides the low-level inotify system call interface and
+associated constants and helper functions.
+
+For a higher-level interface that remains highly efficient, use the
+inotify.watcher package.'''
+
+__author__ = "Bryan O'Sullivan <[e-mail]>"
+
+from _inotify import *
+
+procfs_path = '/proc/sys/fs/inotify'
+
+def _read_procfs_value(name):
+    def read_value():
+        try:
+            return int(open(procfs_path + '/' + name).read())
+        except OSError, err:
+            return None
+
+    read_value.__doc__ = '''Return the value of the %s setting from /proc.
+
+    If inotify is not enabled on this system, return None.''' % name
+
+    return read_value
+
+max_queued_events = _read_procfs_value('max_queued_events')
+max_user_instances = _read_procfs_value('max_user_instances')
+max_user_watches = _read_procfs_value('max_user_watches')