Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/psutil/_psposix.py @ 4:79f47841a781 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:47:39 -0400
parents 26e78fe6e8c4
children
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1 # Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
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2 # Use of this source code is governed by a BSD-style license that can be
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3 # found in the LICENSE file.
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4
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5 """Routines common to all posix systems."""
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6
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7 import glob
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8 import os
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9 import sys
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10 import time
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11
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12 from ._common import memoize
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13 from ._common import sdiskusage
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14 from ._common import TimeoutExpired
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15 from ._common import usage_percent
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16 from ._compat import ChildProcessError
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17 from ._compat import FileNotFoundError
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18 from ._compat import InterruptedError
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19 from ._compat import PermissionError
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20 from ._compat import ProcessLookupError
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21 from ._compat import PY3
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22 from ._compat import unicode
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23
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24
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25 __all__ = ['pid_exists', 'wait_pid', 'disk_usage', 'get_terminal_map']
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26
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27
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28 def pid_exists(pid):
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29 """Check whether pid exists in the current process table."""
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30 if pid == 0:
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31 # According to "man 2 kill" PID 0 has a special meaning:
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32 # it refers to <<every process in the process group of the
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33 # calling process>> so we don't want to go any further.
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34 # If we get here it means this UNIX platform *does* have
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35 # a process with id 0.
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36 return True
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37 try:
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38 os.kill(pid, 0)
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39 except ProcessLookupError:
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40 return False
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41 except PermissionError:
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42 # EPERM clearly means there's a process to deny access to
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43 return True
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44 # According to "man 2 kill" possible error values are
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45 # (EINVAL, EPERM, ESRCH)
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46 else:
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47 return True
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48
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49
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50 def wait_pid(pid, timeout=None, proc_name=None):
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51 """Wait for process with pid 'pid' to terminate and return its
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52 exit status code as an integer.
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53
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54 If pid is not a children of os.getpid() (current process) just
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55 waits until the process disappears and return None.
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56
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57 If pid does not exist at all return None immediately.
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58
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59 Raise TimeoutExpired on timeout expired.
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60 """
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61 def check_timeout(delay):
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62 if timeout is not None:
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63 if timer() >= stop_at:
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64 raise TimeoutExpired(timeout, pid=pid, name=proc_name)
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65 time.sleep(delay)
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66 return min(delay * 2, 0.04)
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67
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68 timer = getattr(time, 'monotonic', time.time)
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69 if timeout is not None:
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70 def waitcall():
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71 return os.waitpid(pid, os.WNOHANG)
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72 stop_at = timer() + timeout
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73 else:
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74 def waitcall():
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75 return os.waitpid(pid, 0)
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76
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77 delay = 0.0001
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78 while True:
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79 try:
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80 retpid, status = waitcall()
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81 except InterruptedError:
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82 delay = check_timeout(delay)
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83 except ChildProcessError:
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84 # This has two meanings:
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85 # - pid is not a child of os.getpid() in which case
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86 # we keep polling until it's gone
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87 # - pid never existed in the first place
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88 # In both cases we'll eventually return None as we
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89 # can't determine its exit status code.
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90 while True:
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91 if pid_exists(pid):
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92 delay = check_timeout(delay)
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93 else:
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94 return
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95 else:
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96 if retpid == 0:
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97 # WNOHANG was used, pid is still running
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98 delay = check_timeout(delay)
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99 continue
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100 # process exited due to a signal; return the integer of
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101 # that signal
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102 if os.WIFSIGNALED(status):
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103 return -os.WTERMSIG(status)
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104 # process exited using exit(2) system call; return the
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105 # integer exit(2) system call has been called with
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106 elif os.WIFEXITED(status):
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107 return os.WEXITSTATUS(status)
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108 else:
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109 # should never happen
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110 raise ValueError("unknown process exit status %r" % status)
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111
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112
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113 def disk_usage(path):
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114 """Return disk usage associated with path.
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115 Note: UNIX usually reserves 5% disk space which is not accessible
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116 by user. In this function "total" and "used" values reflect the
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117 total and used disk space whereas "free" and "percent" represent
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118 the "free" and "used percent" user disk space.
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119 """
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120 if PY3:
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121 st = os.statvfs(path)
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122 else:
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123 # os.statvfs() does not support unicode on Python 2:
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124 # - https://github.com/giampaolo/psutil/issues/416
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125 # - http://bugs.python.org/issue18695
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126 try:
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127 st = os.statvfs(path)
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128 except UnicodeEncodeError:
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129 if isinstance(path, unicode):
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130 try:
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131 path = path.encode(sys.getfilesystemencoding())
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132 except UnicodeEncodeError:
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133 pass
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134 st = os.statvfs(path)
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135 else:
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136 raise
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137
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138 # Total space which is only available to root (unless changed
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139 # at system level).
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140 total = (st.f_blocks * st.f_frsize)
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141 # Remaining free space usable by root.
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142 avail_to_root = (st.f_bfree * st.f_frsize)
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143 # Remaining free space usable by user.
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144 avail_to_user = (st.f_bavail * st.f_frsize)
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145 # Total space being used in general.
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146 used = (total - avail_to_root)
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147 # Total space which is available to user (same as 'total' but
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148 # for the user).
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149 total_user = used + avail_to_user
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150 # User usage percent compared to the total amount of space
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151 # the user can use. This number would be higher if compared
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152 # to root's because the user has less space (usually -5%).
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153 usage_percent_user = usage_percent(used, total_user, round_=1)
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154
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155 # NB: the percentage is -5% than what shown by df due to
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156 # reserved blocks that we are currently not considering:
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157 # https://github.com/giampaolo/psutil/issues/829#issuecomment-223750462
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158 return sdiskusage(
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159 total=total, used=used, free=avail_to_user, percent=usage_percent_user)
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160
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161
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162 @memoize
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163 def get_terminal_map():
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164 """Get a map of device-id -> path as a dict.
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165 Used by Process.terminal()
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166 """
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167 ret = {}
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168 ls = glob.glob('/dev/tty*') + glob.glob('/dev/pts/*')
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169 for name in ls:
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170 assert name not in ret, name
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171 try:
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172 ret[os.stat(name).st_rdev] = name
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173 except FileNotFoundError:
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174 pass
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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175 return ret