def write(self):
'''
Writes the json config file.
'''
try:
with open(self.PATH, 'w') as conf:
json.dump(self.conf, conf, indent=4)
error.log('changes written to {}'.format(self.PATH))
except IOError:
error.error('error writing to {}; changes not applied'.format(
self.PATH))
def _search(self):
'''
Searches into path for a net tool able to operate.
> i: position into self.execs
'''
for i,x in enumerate(self.execs):
cmd = shutil.which(x)
if cmd is not None:
return i
error.error('cannot find a suitable command: '
'install one of this tools {}'.format(self.execs))
def execute(self, eth):
'''
Effectively execute the command with selected tool, using subprocess.
< eth: the chosen eth interface
'''
cmd = self._build(eth)
try:
sp.check_call(cmd, stdout=sp.DEVNULL, stderr=sp.DEVNULL)
except sp.CalledProcessError as e:
if e.returncode == 2:
error.log('static route for multicast streaming already set')
else:
error.error('cannot set static route for multicast streaming')
