1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
# /usr/bin/env python
"""varlink cli tool
Call with:
$ python -m varlink.cli --help
"""
from __future__ import print_function
from __future__ import unicode_literals
import argparse
import json
import shlex
import socket
import sys
import varlink
def varlink_call(args):
deli = args.METHOD.rfind(".")
if deli == -1:
print("No method found", file=sys.stderr)
sys.exit(1)
method = args.METHOD[deli + 1:]
interface = args.METHOD[:deli]
deli = interface.rfind("/")
if deli != -1:
address = interface[:deli]
interface = interface[deli + 1:]
else:
address = None
def new_client(address):
if address:
client = varlink.Client.new_with_address(address)
else:
if args.activate:
client = varlink.Client.new_with_activate(shlex.split(args.activate))
elif args.bridge:
client = varlink.Client.new_with_bridge(shlex.split(args.bridge))
else:
client = varlink.Client.new_with_resolved_interface(interface, args.resolver)
return client
with new_client(address) as client:
got = False
try:
with client.open(interface) as con:
out = {'method': interface + '.' + method, 'more': args.more, 'parameters': json.loads(args.ARGUMENTS or "{}" )}
con._send_message(json.dumps(out, cls=varlink.VarlinkEncoder).encode('utf-8'))
more = True
while more:
(message, more) = con._next_varlink_message()
if message:
print(json.dumps(message, cls=varlink.VarlinkEncoder, indent=2, sort_keys=True))
got = True
except varlink.VarlinkError as e:
print(e, file=sys.stderr)
except varlink.BrokenPipeError:
if not got or args.more:
print("Connection closed")
sys.exit(1)
def varlink_bridge(args):
message = b''
last_interface = None
con = None
client = None
if args.connect:
client = varlink.Client.new_with_address(args.connect)
con = client.open_connection()
elif args.bridge:
client = varlink.Client.new_with_bridge(shlex.split(args.bridge))
con = client.open_connection()
elif args.activate:
client = varlink.Client.new_with_activate(shlex.split(args.activate))
con = client.open_connection()
else:
print("No --connect or --bridge or --activate")
if hasattr(sys.stdout, 'buffer'):
stdout = sys.stdout.buffer
else:
stdout = sys.stdout
if hasattr(sys.stdin, 'buffer'):
stdin = sys.stdin.buffer
else:
stdin = sys.stdin
while not sys.stdin.closed:
c = stdin.read(1)
if c == b'':
break
if c != b'\0':
message += c
continue
req = json.loads(message.decode('utf-8'))
if not args.connect and not args.activate and not args.bridge:
if req['method'] == "org.varlink.service.GetInfo":
req['method'] = "org.varlink.resolver.GetInfo"
interface_name, _, method_name = req.get('method', '').rpartition('.')
if req['method'] == "org.varlink.service.GetInterfaceDescription":
resolving_interface = req['parameters']['interface']
else:
resolving_interface = interface_name
if not interface_name or not method_name:
stdout.write(json.dumps(varlink.InterfaceNotFound(interface_name), cls=varlink.VarlinkEncoder).encode(
'utf-8') + b'\0')
sys.stdout.flush()
continue
if last_interface != resolving_interface:
if con:
if hasattr(con, 'shutdown'):
con.shutdown(socket.SHUT_RDWR)
else:
con.close()
if client:
client.cleanup()
try:
client = varlink.Client.new_with_resolved_interface(resolving_interface,
resolver_address=args.resolver)
except varlink.VarlinkError as e:
stdout.write(
json.dumps(e, cls=varlink.VarlinkEncoder).encode(
'utf-8') + b'\0')
sys.stdout.flush()
continue
con = client.open_connection()
last_interface = resolving_interface
if hasattr(con, "send"):
con.send(message + b'\0')
else:
con.write(message + b'\0')
if req.get("oneway", False):
continue
message = b''
ret_message = b''
while True:
c = con.recv(1)
if c == b'':
break
if c != b'\0':
ret_message += c
continue
stdout.write(ret_message + b'\0')
sys.stdout.flush()
ret = json.loads(ret_message.decode('utf-8'))
ret_message = b''
if not ret.get('continues', False):
break
if ret.get('upgraded', False):
raise NotImplementedError("Bridging upgraded connection not yet supported")
def varlink_help(args):
deli = args.INTERFACE.rfind("/")
if deli != -1:
address = args.INTERFACE[:deli]
interface_name = args.INTERFACE[deli + 1:]
client = varlink.Client.new_with_address(address)
else:
interface_name = args.INTERFACE
if args.activate:
client = varlink.Client.new_with_activate(shlex.split(args.activate))
elif args.bridge:
client = varlink.Client.new_with_bridge(shlex.split(args.bridge))
else:
client = varlink.Client.new_with_resolved_interface(interface_name, args.resolver)
interface = client.get_interface(interface_name)
del client
print(interface.description)
def varlink_info(args):
if args.ADDRESS:
client = varlink.Client.new_with_address(args.ADDRESS)
elif args.bridge:
client = varlink.Client.new_with_bridge(shlex.split(args.bridge))
elif args.activate:
client = varlink.Client.new_with_activate(shlex.split(args.activate))
else:
print("No ADDRESS or --bridge or --activate")
client.get_interfaces()
info = client.info
del client
print("Vendor:", info["vendor"])
print("Product:", info["product"])
print("Version:", info["version"])
print("URL:", info["url"])
print("Interfaces:")
for i in info["interfaces"]:
print(" ", i)
if __name__ == '__main__':
parser = argparse.ArgumentParser()
subparsers = parser.add_subparsers(title="commands")
parser.add_argument('-r', '--resolver', default=None, help='address of the resolver')
parser.add_argument('-A', '--activate', default=None,
help='Service to socket-activate and connect to. '
'The temporary UNIX socket address is exported as $VARLINK_ADDRESS.')
parser.add_argument('-b', '--bridge', default=None, help='Command to execute and connect to')
parser_info = subparsers.add_parser('info', help='Print information about a service')
parser_info.add_argument('ADDRESS', nargs='?')
parser_info.set_defaults(func=varlink_info)
parser_help = subparsers.add_parser('help', help='Print interface description or service information')
parser_help.add_argument('INTERFACE')
parser_help.set_defaults(func=varlink_help)
parser_bridge = subparsers.add_parser('bridge', help='Bridge varlink messages to services on this machine')
parser_bridge.add_argument('-c', '--connect', default=None, help='Optional varlink address to connect to, '
'without using the resolver.')
parser_bridge.set_defaults(func=varlink_bridge)
parser_call = subparsers.add_parser('call', help='Call a method')
parser_call.add_argument('-m', '--more', action='store_true', help='wait for multiple method returns if supported')
parser_call.add_argument('METHOD')
parser_call.add_argument('ARGUMENTS', nargs='?', default="")
parser_call.set_defaults(func=varlink_call)
args = parser.parse_args()
if not hasattr(args, "func"):
parser.print_usage(sys.stderr)
sys.exit(1)
args.func(args)
|
