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annotate planemo/lib/python3.7/site-packages/psutil/tests/test_posix.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 #!/usr/bin/env python3
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2 # -*- coding: utf-8 -*-
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3
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4 # Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
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5 # Use of this source code is governed by a BSD-style license that can be
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6 # found in the LICENSE file.
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7
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8 """POSIX specific tests."""
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9
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10 import datetime
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11 import errno
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12 import os
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13 import re
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14 import subprocess
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15 import time
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16
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17 import psutil
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18 from psutil import AIX
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19 from psutil import BSD
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20 from psutil import LINUX
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21 from psutil import MACOS
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22 from psutil import OPENBSD
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23 from psutil import POSIX
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24 from psutil import SUNOS
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25 from psutil.tests import CI_TESTING
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26 from psutil.tests import spawn_testproc
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27 from psutil.tests import HAS_NET_IO_COUNTERS
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28 from psutil.tests import mock
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29 from psutil.tests import PsutilTestCase
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30 from psutil.tests import PYTHON_EXE
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31 from psutil.tests import retry_on_failure
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32 from psutil.tests import sh
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33 from psutil.tests import skip_on_access_denied
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34 from psutil.tests import terminate
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35 from psutil.tests import TRAVIS
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36 from psutil.tests import unittest
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37 from psutil.tests import which
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38
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39
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40 def ps(fmt, pid=None):
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41 """
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42 Wrapper for calling the ps command with a little bit of cross-platform
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43 support for a narrow range of features.
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44 """
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45
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46 cmd = ['ps']
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47
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48 if LINUX:
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49 cmd.append('--no-headers')
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50
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51 if pid is not None:
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52 cmd.extend(['-p', str(pid)])
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53 else:
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54 if SUNOS or AIX:
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55 cmd.append('-A')
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56 else:
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57 cmd.append('ax')
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58
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59 if SUNOS:
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60 fmt_map = set(('command', 'comm', 'start', 'stime'))
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61 fmt = fmt_map.get(fmt, fmt)
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62
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63 cmd.extend(['-o', fmt])
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64
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65 output = sh(cmd)
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66
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67 if LINUX:
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68 output = output.splitlines()
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69 else:
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70 output = output.splitlines()[1:]
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71
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72 all_output = []
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73 for line in output:
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74 line = line.strip()
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75
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76 try:
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77 line = int(line)
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78 except ValueError:
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79 pass
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80
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81 all_output.append(line)
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82
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83 if pid is None:
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84 return all_output
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85 else:
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86 return all_output[0]
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87
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88 # ps "-o" field names differ wildly between platforms.
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89 # "comm" means "only executable name" but is not available on BSD platforms.
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90 # "args" means "command with all its arguments", and is also not available
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91 # on BSD platforms.
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92 # "command" is like "args" on most platforms, but like "comm" on AIX,
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93 # and not available on SUNOS.
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94 # so for the executable name we can use "comm" on Solaris and split "command"
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95 # on other platforms.
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96 # to get the cmdline (with args) we have to use "args" on AIX and
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97 # Solaris, and can use "command" on all others.
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98
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99
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100 def ps_name(pid):
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101 field = "command"
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102 if SUNOS:
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103 field = "comm"
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104 return ps(field, pid).split()[0]
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105
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106
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107 def ps_args(pid):
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108 field = "command"
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109 if AIX or SUNOS:
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110 field = "args"
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111 return ps(field, pid)
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112
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113
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114 def ps_rss(pid):
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115 field = "rss"
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116 if AIX:
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117 field = "rssize"
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118 return ps(field, pid)
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119
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120
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121 def ps_vsz(pid):
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122 field = "vsz"
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123 if AIX:
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124 field = "vsize"
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125 return ps(field, pid)
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126
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127
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128 @unittest.skipIf(not POSIX, "POSIX only")
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129 class TestProcess(PsutilTestCase):
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130 """Compare psutil results against 'ps' command line utility (mainly)."""
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131
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132 @classmethod
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133 def setUpClass(cls):
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134 cls.pid = spawn_testproc([PYTHON_EXE, "-E", "-O"],
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135 stdin=subprocess.PIPE).pid
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136
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137 @classmethod
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138 def tearDownClass(cls):
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139 terminate(cls.pid)
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140
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141 def test_ppid(self):
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142 ppid_ps = ps('ppid', self.pid)
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143 ppid_psutil = psutil.Process(self.pid).ppid()
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144 self.assertEqual(ppid_ps, ppid_psutil)
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145
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146 def test_uid(self):
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147 uid_ps = ps('uid', self.pid)
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148 uid_psutil = psutil.Process(self.pid).uids().real
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149 self.assertEqual(uid_ps, uid_psutil)
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150
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151 def test_gid(self):
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152 gid_ps = ps('rgid', self.pid)
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153 gid_psutil = psutil.Process(self.pid).gids().real
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154 self.assertEqual(gid_ps, gid_psutil)
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155
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156 def test_username(self):
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157 username_ps = ps('user', self.pid)
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158 username_psutil = psutil.Process(self.pid).username()
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159 self.assertEqual(username_ps, username_psutil)
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160
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161 def test_username_no_resolution(self):
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162 # Emulate a case where the system can't resolve the uid to
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163 # a username in which case psutil is supposed to return
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164 # the stringified uid.
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165 p = psutil.Process()
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166 with mock.patch("psutil.pwd.getpwuid", side_effect=KeyError) as fun:
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167 self.assertEqual(p.username(), str(p.uids().real))
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168 assert fun.called
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169
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170 @skip_on_access_denied()
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171 @retry_on_failure()
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172 def test_rss_memory(self):
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173 # give python interpreter some time to properly initialize
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174 # so that the results are the same
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175 time.sleep(0.1)
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176 rss_ps = ps_rss(self.pid)
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177 rss_psutil = psutil.Process(self.pid).memory_info()[0] / 1024
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178 self.assertEqual(rss_ps, rss_psutil)
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179
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180 @skip_on_access_denied()
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181 @retry_on_failure()
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182 def test_vsz_memory(self):
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183 # give python interpreter some time to properly initialize
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184 # so that the results are the same
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185 time.sleep(0.1)
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186 vsz_ps = ps_vsz(self.pid)
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187 vsz_psutil = psutil.Process(self.pid).memory_info()[1] / 1024
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188 self.assertEqual(vsz_ps, vsz_psutil)
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189
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190 def test_name(self):
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191 name_ps = ps_name(self.pid)
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192 # remove path if there is any, from the command
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193 name_ps = os.path.basename(name_ps).lower()
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194 name_psutil = psutil.Process(self.pid).name().lower()
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195 # ...because of how we calculate PYTHON_EXE; on MACOS this may
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196 # be "pythonX.Y".
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197 name_ps = re.sub(r"\d.\d", "", name_ps)
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198 name_psutil = re.sub(r"\d.\d", "", name_psutil)
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199 # ...may also be "python.X"
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200 name_ps = re.sub(r"\d", "", name_ps)
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201 name_psutil = re.sub(r"\d", "", name_psutil)
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202 self.assertEqual(name_ps, name_psutil)
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203
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204 def test_name_long(self):
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205 # On UNIX the kernel truncates the name to the first 15
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206 # characters. In such a case psutil tries to determine the
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207 # full name from the cmdline.
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208 name = "long-program-name"
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209 cmdline = ["long-program-name-extended", "foo", "bar"]
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210 with mock.patch("psutil._psplatform.Process.name",
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211 return_value=name):
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212 with mock.patch("psutil._psplatform.Process.cmdline",
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213 return_value=cmdline):
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214 p = psutil.Process()
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215 self.assertEqual(p.name(), "long-program-name-extended")
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216
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217 def test_name_long_cmdline_ad_exc(self):
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218 # Same as above but emulates a case where cmdline() raises
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219 # AccessDenied in which case psutil is supposed to return
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220 # the truncated name instead of crashing.
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221 name = "long-program-name"
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222 with mock.patch("psutil._psplatform.Process.name",
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223 return_value=name):
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224 with mock.patch("psutil._psplatform.Process.cmdline",
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225 side_effect=psutil.AccessDenied(0, "")):
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226 p = psutil.Process()
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227 self.assertEqual(p.name(), "long-program-name")
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228
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229 def test_name_long_cmdline_nsp_exc(self):
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230 # Same as above but emulates a case where cmdline() raises NSP
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231 # which is supposed to propagate.
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232 name = "long-program-name"
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233 with mock.patch("psutil._psplatform.Process.name",
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234 return_value=name):
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235 with mock.patch("psutil._psplatform.Process.cmdline",
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236 side_effect=psutil.NoSuchProcess(0, "")):
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237 p = psutil.Process()
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238 self.assertRaises(psutil.NoSuchProcess, p.name)
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239
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240 @unittest.skipIf(MACOS or BSD, 'ps -o start not available')
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241 def test_create_time(self):
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242 time_ps = ps('start', self.pid)
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243 time_psutil = psutil.Process(self.pid).create_time()
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244 time_psutil_tstamp = datetime.datetime.fromtimestamp(
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245 time_psutil).strftime("%H:%M:%S")
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246 # sometimes ps shows the time rounded up instead of down, so we check
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247 # for both possible values
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248 round_time_psutil = round(time_psutil)
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249 round_time_psutil_tstamp = datetime.datetime.fromtimestamp(
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250 round_time_psutil).strftime("%H:%M:%S")
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251 self.assertIn(time_ps, [time_psutil_tstamp, round_time_psutil_tstamp])
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252
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253 def test_exe(self):
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254 ps_pathname = ps_name(self.pid)
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255 psutil_pathname = psutil.Process(self.pid).exe()
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256 try:
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257 self.assertEqual(ps_pathname, psutil_pathname)
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258 except AssertionError:
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259 # certain platforms such as BSD are more accurate returning:
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260 # "/usr/local/bin/python2.7"
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261 # ...instead of:
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262 # "/usr/local/bin/python"
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263 # We do not want to consider this difference in accuracy
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264 # an error.
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265 adjusted_ps_pathname = ps_pathname[:len(ps_pathname)]
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266 self.assertEqual(ps_pathname, adjusted_ps_pathname)
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267
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268 def test_cmdline(self):
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269 ps_cmdline = ps_args(self.pid)
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270 psutil_cmdline = " ".join(psutil.Process(self.pid).cmdline())
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271 self.assertEqual(ps_cmdline, psutil_cmdline)
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272
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273 # On SUNOS "ps" reads niceness /proc/pid/psinfo which returns an
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274 # incorrect value (20); the real deal is getpriority(2) which
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275 # returns 0; psutil relies on it, see:
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276 # https://github.com/giampaolo/psutil/issues/1082
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277 # AIX has the same issue
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278 @unittest.skipIf(SUNOS, "not reliable on SUNOS")
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279 @unittest.skipIf(AIX, "not reliable on AIX")
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280 def test_nice(self):
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281 ps_nice = ps('nice', self.pid)
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282 psutil_nice = psutil.Process().nice()
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283 self.assertEqual(ps_nice, psutil_nice)
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284
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285
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286 @unittest.skipIf(not POSIX, "POSIX only")
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287 class TestSystemAPIs(PsutilTestCase):
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288 """Test some system APIs."""
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289
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290 @retry_on_failure()
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291 def test_pids(self):
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292 # Note: this test might fail if the OS is starting/killing
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293 # other processes in the meantime
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294 pids_ps = sorted(ps("pid"))
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295 pids_psutil = psutil.pids()
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296
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297 # on MACOS and OPENBSD ps doesn't show pid 0
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298 if MACOS or OPENBSD and 0 not in pids_ps:
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299 pids_ps.insert(0, 0)
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300
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301 # There will often be one more process in pids_ps for ps itself
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302 if len(pids_ps) - len(pids_psutil) > 1:
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303 difference = [x for x in pids_psutil if x not in pids_ps] + \
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304 [x for x in pids_ps if x not in pids_psutil]
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305 self.fail("difference: " + str(difference))
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306
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307 # for some reason ifconfig -a does not report all interfaces
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308 # returned by psutil
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309 @unittest.skipIf(SUNOS, "unreliable on SUNOS")
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310 @unittest.skipIf(TRAVIS, "unreliable on TRAVIS")
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311 @unittest.skipIf(not which('ifconfig'), "no ifconfig cmd")
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312 @unittest.skipIf(not HAS_NET_IO_COUNTERS, "not supported")
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313 def test_nic_names(self):
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314 output = sh("ifconfig -a")
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315 for nic in psutil.net_io_counters(pernic=True).keys():
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316 for line in output.split():
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317 if line.startswith(nic):
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318 break
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319 else:
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320 self.fail(
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321 "couldn't find %s nic in 'ifconfig -a' output\n%s" % (
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322 nic, output))
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323
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324 @unittest.skipIf(CI_TESTING and not psutil.users(), "unreliable on CI")
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325 @retry_on_failure()
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326 def test_users(self):
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327 out = sh("who")
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328 if not out.strip():
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329 raise self.skipTest("no users on this system")
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330 lines = out.split('\n')
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331 users = [x.split()[0] for x in lines]
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332 terminals = [x.split()[1] for x in lines]
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333 self.assertEqual(len(users), len(psutil.users()))
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334 for u in psutil.users():
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335 self.assertIn(u.name, users)
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336 self.assertIn(u.terminal, terminals)
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337
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338 def test_pid_exists_let_raise(self):
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339 # According to "man 2 kill" possible error values for kill
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340 # are (EINVAL, EPERM, ESRCH). Test that any other errno
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341 # results in an exception.
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342 with mock.patch("psutil._psposix.os.kill",
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343 side_effect=OSError(errno.EBADF, "")) as m:
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344 self.assertRaises(OSError, psutil._psposix.pid_exists, os.getpid())
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345 assert m.called
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346
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347 def test_os_waitpid_let_raise(self):
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348 # os.waitpid() is supposed to catch EINTR and ECHILD only.
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349 # Test that any other errno results in an exception.
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350 with mock.patch("psutil._psposix.os.waitpid",
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351 side_effect=OSError(errno.EBADF, "")) as m:
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352 self.assertRaises(OSError, psutil._psposix.wait_pid, os.getpid())
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353 assert m.called
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354
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355 def test_os_waitpid_eintr(self):
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356 # os.waitpid() is supposed to "retry" on EINTR.
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357 with mock.patch("psutil._psposix.os.waitpid",
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358 side_effect=OSError(errno.EINTR, "")) as m:
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359 self.assertRaises(
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360 psutil._psposix.TimeoutExpired,
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361 psutil._psposix.wait_pid, os.getpid(), timeout=0.01)
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362 assert m.called
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363
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364 def test_os_waitpid_bad_ret_status(self):
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365 # Simulate os.waitpid() returning a bad status.
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366 with mock.patch("psutil._psposix.os.waitpid",
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367 return_value=(1, -1)) as m:
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368 self.assertRaises(ValueError,
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369 psutil._psposix.wait_pid, os.getpid())
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370 assert m.called
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371
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372 # AIX can return '-' in df output instead of numbers, e.g. for /proc
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373 @unittest.skipIf(AIX, "unreliable on AIX")
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374 def test_disk_usage(self):
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375 def df(device):
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376 out = sh("df -k %s" % device).strip()
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377 line = out.split('\n')[1]
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378 fields = line.split()
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379 total = int(fields[1]) * 1024
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380 used = int(fields[2]) * 1024
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381 free = int(fields[3]) * 1024
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382 percent = float(fields[4].replace('%', ''))
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383 return (total, used, free, percent)
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384
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385 tolerance = 4 * 1024 * 1024 # 4MB
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386 for part in psutil.disk_partitions(all=False):
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387 usage = psutil.disk_usage(part.mountpoint)
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388 try:
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389 total, used, free, percent = df(part.device)
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390 except RuntimeError as err:
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391 # see:
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392 # https://travis-ci.org/giampaolo/psutil/jobs/138338464
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393 # https://travis-ci.org/giampaolo/psutil/jobs/138343361
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394 err = str(err).lower()
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395 if "no such file or directory" in err or \
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396 "raw devices not supported" in err or \
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397 "permission denied" in err:
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398 continue
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399 else:
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400 raise
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401 else:
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402 self.assertAlmostEqual(usage.total, total, delta=tolerance)
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403 self.assertAlmostEqual(usage.used, used, delta=tolerance)
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404 self.assertAlmostEqual(usage.free, free, delta=tolerance)
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405 self.assertAlmostEqual(usage.percent, percent, delta=1)
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406
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407
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408 if __name__ == '__main__':
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409 from psutil.tests.runner import run_from_name
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410 run_from_name(__file__)