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#!/usr/bin/python
#
# Copyright 2013 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=
import cliapp
__version__ = '0.0'
class DropCaches(cliapp.Application):
def add_settings(self):
self.settings.choice(
['what'],
['all', 'pagecache', 'inodes'],
'drop WHAT ("all", "pagecache", "inodes")')
def process_args(self, args):
# The values in this able are determined by the kernel. Change
# at your own risk.
drop_values = {
'pagecache': 1,
'inodes': 2,
'all': 3,
}
what = self.settings['what']
if what not in drop_values:
raise cliapp.AppException('Unknown choice %s' % what)
with open('/proc/sys/vm/drop_caches', 'w') as f:
f.write('%d\n' % drop_values[what])
DropCaches(version=__version__).run()
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