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
|
# Copyright 2018 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Helper functions for remotely executing and copying files over a SSH
connection."""
import os
import subprocess
_SSH = ['ssh']
_SCP = ['scp']
COPY_TO_TARGET = 0
COPY_FROM_TARGET = 1
def RunSsh(config_path, host, port, command, silent):
"""Executes an SSH command on the remote host and blocks until completion.
config_path: Full path to SSH configuration.
host: The hostname or IP address of the remote host.
port: The port to connect to.
command: A list of strings containing the command and its arguments.
silent: If true, suppresses all output from 'ssh'.
Returns the exit code from the remote command."""
ssh_command = _SSH + ['-F', config_path,
host,
'-p', str(port)] + command
if silent:
devnull = open(os.devnull, 'w')
return subprocess.call(ssh_command, stderr=devnull, stdout=devnull)
else:
return subprocess.call(ssh_command)
def RunPipedSsh(config_path, host, port, command):
"""Executes an SSH command on the remote host and returns a process object
with access to the command's stdio streams. Does not block.
config_path: Full path to SSH configuration.
host: The hostname or IP address of the remote host.
port: The port to connect to.
command: A list of strings containing the command and its arguments.
silent: If true, suppresses all output from 'ssh'.
Returns a Popen object for the command."""
ssh_command = _SSH + ['-F', config_path,
host,
'-p', str(port)] + command
return subprocess.Popen(ssh_command,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
stdin=subprocess.PIPE)
def RunScp(config_path, host, port, source, dest, direction):
"""Copies a file to or from a remote host using SCP and blocks until
completion.
config_path: Full path to SSH configuration.
host: The hostname or IP address of the remote host.
port: The port to connect to.
source: The path of the file to be copied.
dest: The path that |source| will be copied to.
direction: Indicates whether the file should be copied to
or from the remote side.
Valid values are COPY_TO_TARGET or COPY_FROM_TARGET.
Function will raise an assertion if a failure occurred."""
if direction == COPY_TO_TARGET:
dest = "%s:%s" % (host, dest)
else:
source = "%s:%s" % (host, source)
scp_command = _SCP + ['-F', config_path,
'-P', str(port),
source,
dest]
devnull = open('/dev/null', 'w')
subprocess.check_call(scp_command, stdout=devnull)
|
