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ed00741a01
* Replace pipes.quote for shlex_quote * More migration of pipes.quote to shlex_quote Note that we cannot yet move module code over. Modules have six-1.4 bundled which does not have shlex_quote. This shouldn't be a problem as the function is still importable from pipes.quote. It's just that this has become an implementation detail that makes us want to import from shlex instead. Once we get rid of the python2.4 dependency we can update to a newer version of bundled six module-side and then we're free to use shlex_quote everywhere.
84 lines
4.1 KiB
Python
84 lines
4.1 KiB
Python
# (c) 2014, Chris Church <chris@ninemoreminutes.com>
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#
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# This file is part of Ansible.
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#
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# Ansible 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 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible 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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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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from ansible.compat.six.moves import shlex_quote
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from ansible.plugins.shell import ShellBase
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class ShellModule(ShellBase):
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# Common shell filenames that this plugin handles.
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# Note: sh is the default shell plugin so this plugin may also be selected
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# if the filename is not listed in any Shell plugin.
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COMPATIBLE_SHELLS = frozenset(('sh', 'zsh', 'bash', 'dash', 'ksh'))
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# Family of shells this has. Must match the filename without extension
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SHELL_FAMILY = 'sh'
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# How to end lines in a python script one-liner
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_SHELL_EMBEDDED_PY_EOL = '\n'
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_SHELL_REDIRECT_ALLNULL = '> /dev/null 2>&1'
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_SHELL_AND = '&&'
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_SHELL_OR = '||'
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_SHELL_SUB_LEFT = '"`'
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_SHELL_SUB_RIGHT = '`"'
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_SHELL_GROUP_LEFT = '('
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_SHELL_GROUP_RIGHT = ')'
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def checksum(self, path, python_interp):
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# The following test needs to be SH-compliant. BASH-isms will
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# not work if /bin/sh points to a non-BASH shell.
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#
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# In the following test, each condition is a check and logical
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# comparison (|| or &&) that sets the rc value. Every check is run so
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# the last check in the series to fail will be the rc that is
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# returned.
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#
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# If a check fails we error before invoking the hash functions because
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# hash functions may successfully take the hash of a directory on BSDs
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# (UFS filesystem?) which is not what the rest of the ansible code
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# expects
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#
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# If all of the available hashing methods fail we fail with an rc of
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# 0. This logic is added to the end of the cmd at the bottom of this
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# function.
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# Return codes:
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# checksum: success!
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# 0: Unknown error
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# 1: Remote file does not exist
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# 2: No read permissions on the file
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# 3: File is a directory
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# 4: No python interpreter
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# Quoting gets complex here. We're writing a python string that's
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# used by a variety of shells on the remote host to invoke a python
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# "one-liner".
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shell_escaped_path = shlex_quote(path)
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test = "rc=flag; [ -r %(p)s ] %(shell_or)s rc=2; [ -f %(p)s ] %(shell_or)s rc=1; [ -d %(p)s ] %(shell_and)s rc=3; %(i)s -V 2>/dev/null %(shell_or)s rc=4; [ x\"$rc\" != \"xflag\" ] %(shell_and)s echo \"${rc} \"%(p)s %(shell_and)s exit 0" % dict(p=shell_escaped_path, i=python_interp, shell_and=self._SHELL_AND, shell_or=self._SHELL_OR)
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csums = [
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u"({0} -c 'import hashlib; BLOCKSIZE = 65536; hasher = hashlib.sha1();{2}afile = open(\"'{1}'\", \"rb\"){2}buf = afile.read(BLOCKSIZE){2}while len(buf) > 0:{2}\thasher.update(buf){2}\tbuf = afile.read(BLOCKSIZE){2}afile.close(){2}print(hasher.hexdigest())' 2>/dev/null)".format(python_interp, shell_escaped_path, self._SHELL_EMBEDDED_PY_EOL), # Python > 2.4 (including python3)
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u"({0} -c 'import sha; BLOCKSIZE = 65536; hasher = sha.sha();{2}afile = open(\"'{1}'\", \"rb\"){2}buf = afile.read(BLOCKSIZE){2}while len(buf) > 0:{2}\thasher.update(buf){2}\tbuf = afile.read(BLOCKSIZE){2}afile.close(){2}print(hasher.hexdigest())' 2>/dev/null)".format(python_interp, shell_escaped_path, self._SHELL_EMBEDDED_PY_EOL), # Python == 2.4
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]
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cmd = (" %s " % self._SHELL_OR).join(csums)
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cmd = "%s; %s %s (echo \'0 \'%s)" % (test, cmd, self._SHELL_OR, shell_escaped_path)
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return cmd
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