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# Copyright (C) 2006-2009 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Implementation of Transport that prevents access to locations above a set
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from bzrlib.transport import (
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class ChrootServer(pathfilter.PathFilteringServer):
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"""User space 'chroot' facility.
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The server's get_url returns the url for a chroot transport mapped to the
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backing transport. The url is of the form chroot-xxx:/// so parent
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directories of the backing transport are not visible. The chroot url will
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not allow '..' sequences to result in requests to the chroot affecting
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directories outside the backing transport.
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PathFilteringServer does all the path sanitation needed to enforce a
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chroot, so this is a simple subclass of PathFilteringServer that ignores
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def __init__(self, backing_transport):
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pathfilter.PathFilteringServer.__init__(self, backing_transport, None)
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def _factory(self, url):
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return ChrootTransport(self, url)
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def start_server(self):
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self.scheme = 'chroot-%d:///' % id(self)
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register_transport(self.scheme, self._factory)
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class ChrootTransport(pathfilter.PathFilteringTransport):
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Please see ChrootServer for details.
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def _filter(self, relpath):
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# A simplified version of PathFilteringTransport's _filter that omits
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# the call to self.server.filter_func.
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return self._relpath_from_server_root(relpath)
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class TestingChrootServer(ChrootServer):
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"""TestingChrootServer is not usable until start_server is called."""
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ChrootServer.__init__(self, None)
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def start_server(self, backing_server=None):
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"""Setup the Chroot on backing_server."""
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if backing_server is not None:
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self.backing_transport = get_transport(backing_server.get_url())
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self.backing_transport = get_transport('.')
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ChrootServer.start_server(self)
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def get_test_permutations():
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"""Return the permutations to be used in testing."""
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return [(ChrootTransport, TestingChrootServer)]