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annotate hgext/inotify/linux/__init__.py @ 18010:38b51a60a195
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| author | Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
|---|---|
| date | Mon, 08 Oct 2012 18:02:25 +0200 |
| parents | 14f3795a5ed7 |
| children |
| rev | line source |
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| 6239 | 1 # __init__.py - low-level interfaces to the Linux inotify subsystem |
| 2 | |
| 3 # Copyright 2006 Bryan O'Sullivan <bos@serpentine.com> | |
| 4 | |
| 5 # This library is free software; you can redistribute it and/or modify | |
| 6 # it under the terms of version 2.1 of the GNU Lesser General Public | |
| 10263 | 7 # License, or any later version. |
| 6239 | 8 |
| 9 '''Low-level interface to the Linux inotify subsystem. | |
| 10 | |
| 11 The inotify subsystem provides an efficient mechanism for file status | |
| 12 monitoring and change notification. | |
| 13 | |
| 14 This package provides the low-level inotify system call interface and | |
| 15 associated constants and helper functions. | |
| 16 | |
| 17 For a higher-level interface that remains highly efficient, use the | |
| 18 inotify.watcher package.''' | |
| 19 | |
| 20 __author__ = "Bryan O'Sullivan <bos@serpentine.com>" | |
| 21 | |
| 22 from _inotify import * | |
| 23 | |
| 24 procfs_path = '/proc/sys/fs/inotify' | |
| 25 | |
| 26 def _read_procfs_value(name): | |
| 27 def read_value(): | |
| 28 try: | |
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14f3795a5ed7
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Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents:
10263
diff
changeset
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29 fp = open(procfs_path + '/' + name) |
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14f3795a5ed7
explicitly close files
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents:
10263
diff
changeset
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30 r = int(fp.read()) |
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14f3795a5ed7
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Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents:
10263
diff
changeset
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31 fp.close() |
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14f3795a5ed7
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Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents:
10263
diff
changeset
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32 return r |
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Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
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33 except OSError: |
| 6239 | 34 return None |
| 35 | |
| 36 read_value.__doc__ = '''Return the value of the %s setting from /proc. | |
| 37 | |
| 38 If inotify is not enabled on this system, return None.''' % name | |
| 39 | |
| 40 return read_value | |
| 41 | |
| 42 max_queued_events = _read_procfs_value('max_queued_events') | |
| 43 max_user_instances = _read_procfs_value('max_user_instances') | |
| 44 max_user_watches = _read_procfs_value('max_user_watches') |