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# SPDX-License-Identifier: GPL-2.0
import json as _json
import subprocess
class cmd:
def __init__(self, comm, shell=True, fail=True, ns=None, background=False, host=None):
if ns:
comm = f'ip netns exec {ns} ' + comm
self.stdout = None
self.stderr = None
self.ret = None
self.comm = comm
if host:
self.proc = host.cmd(comm)
else:
self.proc = subprocess.Popen(comm, shell=shell, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
if not background:
self.process(terminate=False, fail=fail)
def process(self, terminate=True, fail=None):
if terminate:
self.proc.terminate()
stdout, stderr = self.proc.communicate(timeout=5)
self.stdout = stdout.decode("utf-8")
self.stderr = stderr.decode("utf-8")
self.proc.stdout.close()
self.proc.stderr.close()
self.ret = self.proc.returncode
if self.proc.returncode != 0 and fail:
if len(stderr) > 0 and stderr[-1] == "\n":
stderr = stderr[:-1]
raise Exception("Command failed: %s\nSTDOUT: %s\nSTDERR: %s" %
(self.proc.args, stdout, stderr))
def ip(args, json=None, ns=None, host=None):
cmd_str = "ip "
if json:
cmd_str += '-j '
cmd_str += args
cmd_obj = cmd(cmd_str, ns=ns, host=host)
if json:
return _json.loads(cmd_obj.stdout)
return cmd_obj
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