1 #! /usr/bin/env python3
2 # SPDX-License-Identifier: BSD-3-Clause
3 # Copyright(c) 2020 Intel Corporation
6 Script to be used with V2 Telemetry.
7 Allows the user input commands and read the Telemetry response.
19 TELEMETRY_VERSION = "v2"
23 def read_socket(sock, buf_len, echo=True):
24 """ Read data from socket and return it in JSON format """
25 reply = sock.recv(buf_len).decode()
27 ret = json.loads(reply)
28 except json.JSONDecodeError:
29 print("Error in reply: ", reply)
33 print(json.dumps(ret))
37 def get_app_name(pid):
38 """ return the app name for a given PID, for printing """
39 proc_cmdline = os.path.join('/proc', str(pid), 'cmdline')
41 with open(proc_cmdline) as f:
42 argv0 = f.read(1024).split('\0')[0]
43 return os.path.basename(argv0)
45 # ignore file not found errors
46 if e.errno != errno.ENOENT:
51 def handle_socket(path):
52 """ Connect to socket and handle user input """
53 prompt = '' # this evaluates to false in conditions
54 sock = socket.socket(socket.AF_UNIX, socket.SOCK_SEQPACKET)
57 if os.isatty(sys.stdin.fileno()):
59 print("Connecting to " + path)
63 print("Error connecting to " + path)
66 json_reply = read_socket(sock, 1024, prompt)
67 output_buf_len = json_reply["max_output_len"]
68 app_name = get_app_name(json_reply["pid"])
69 if app_name and prompt:
70 print('Connected to application: "%s"' % app_name)
72 # get list of commands for readline completion
73 sock.send("/".encode())
74 CMDS = read_socket(sock, output_buf_len, False)["/"]
78 text = input(prompt).strip()
80 if text.startswith('/'):
81 sock.send(text.encode())
82 read_socket(sock, output_buf_len)
83 text = input(prompt).strip()
90 def readline_complete(text, state):
91 """ Find any matching commands from the list based on user input """
92 all_cmds = ['quit'] + CMDS
94 matches = [c for c in all_cmds if c.startswith(text)]
100 def get_dpdk_runtime_dir(fp):
101 """ Using the same logic as in DPDK's EAL, get the DPDK runtime directory
102 based on the file-prefix and user """
103 if (os.getuid() == 0):
104 return os.path.join('/var/run/dpdk', fp)
105 return os.path.join(os.environ.get('XDG_RUNTIME_DIR', '/tmp'), 'dpdk', fp)
108 readline.parse_and_bind('tab: complete')
109 readline.set_completer(readline_complete)
110 readline.set_completer_delims(readline.get_completer_delims().replace('/', ''))
112 parser = argparse.ArgumentParser()
113 parser.add_argument('-f', '--file-prefix', default='rte',
114 help='Provide file-prefix for DPDK runtime directory')
115 args = parser.parse_args()
116 rd = get_dpdk_runtime_dir(args.file_prefix)
117 handle_socket(os.path.join(rd, 'dpdk_telemetry.{}'.format(TELEMETRY_VERSION)))