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# Copyright 2017 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
import subprocess
import re
class VyOSError(Exception):
pass
class Config(object):
def __init__(self):
self._cli_shell_api = "/bin/cli-shell-api"
self._level = ""
def _make_command(self, op, path):
args = path.split()
cmd = [self._cli_shell_api, op] + args
return cmd
def _run(self, cmd):
p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
out = p.stdout.read()
p.wait()
if p.returncode != 0:
raise VyOSError()
else:
return out.decode('ascii')
def set_level(self, path):
# Make sure there's always a space between default path (level)
# and path supplied as method argument
# XXX: for small strings in-place concatenation is not a problem
self._level = path + " "
def get_level(self):
return(self._level.strip())
def exists(self, path):
try:
self._run(self._make_command('exists', self._level + path))
return True
except VyOSError:
return False
def session_changed(self):
try:
self._run(self._make_command('sessionChanged', ''))
return True
except VyOSError:
return False
def in_session(self):
try:
self._run(self._make_command('inSession', ''))
return True
except VyOSError:
return False
def is_multi(self, path):
try:
self._run(self._make_command('isMulti', self._level + path))
return True
except VyOSError:
return False
def is_tag(self, path):
try:
self._run(self._make_command('isTag', self._level + path))
return True
except VyOSError:
return False
def is_leaf(self, path):
try:
self._run(self._make_command('isLeaf', self._level + path))
return True
except VyOSError:
return False
def return_value(self, path, default=None):
full_path = self._level + path
if self.is_multi(path):
raise VyOSError("Cannot use return_value on multi node: {0}".format(full_path))
elif not self.is_leaf(path):
raise VyOSError("Cannot use return_value on non-leaf node: {0}".format(full_path))
else:
try:
out = self._run(self._make_command('returnValue', full_path))
return out
except VyOSError:
return(default)
def return_values(self, path, default=[]):
full_path = self._level + path
if not self.is_multi(path):
raise VyOSError("Cannot use return_values on non-multi node: {0}".format(full_path))
elif not self.is_leaf(path):
raise VyOSError("Cannot use return_values on non-leaf node: {0}".format(full_path))
else:
try:
out = self._run(self._make_command('returnValues', full_path))
values = out.split()
return list(map(lambda x: re.sub(r'^\'(.*)\'$', r'\1',x), values))
except VyOSError:
return(default)
def list_nodes(self, path, default=[]):
full_path = self._level + path
if self.is_tag(path):
try:
out = self._run(self._make_command('listNodes', full_path))
values = out.split()
return list(map(lambda x: re.sub(r'^\'(.*)\'$', r'\1',x), values))
except VyOSError:
return(default)
else:
raise VyOSError("Cannot use list_nodes on a non-tag node: {0}".format(full_path))
def exists_effective(self, path):
try:
self._run(self._make_command('existsEffective', self._level + path))
return True
except VyOSError:
return False
def return_effective_value(self, path, default=None):
full_path = self._level + path
if self.is_multi(path):
raise VyOSError("Cannot use return_effective_value on multi node: {0}".format(full_path))
elif not self.is_leaf(path):
raise VyOSError("Cannot use return_effective_value on non-leaf node: {0}".format(full_path))
else:
try:
out = self._run(self._make_command('returnEffectiveValue', full_path))
return out
except VyOSError:
return(default)
def return_effective_values(self, path, default=[]):
full_path = self._level + path
if not self.is_multi(path):
raise VyOSError("Cannot use return_effective_values on non-multi node: {0}".format(full_path))
elif not self.is_leaf(path):
raise VyOSError("Cannot use return_effective_values on non-leaf node: {0}".format(full_path))
else:
try:
out = self._run(self._make_command('returnEffectiveValues', full_path))
return out
except VyOSError:
return(default)
def list_effective_nodes(self, path, default=[]):
full_path = self._level + path
if self.is_tag(path):
try:
out = self._run(self._make_command('listEffectiveNodes', full_path))
values = out.split()
return list(map(lambda x: re.sub(r'^\'(.*)\'$', r'\1',x), values))
except VyOSError:
return(default)
else:
raise VyOSError("Cannot use list_effective_nodes on a non-tag node: {0}".format(full_path))
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