/usr/lib/python2.7/dist-packages/psutil/_common.py is in python-psutil 1.2.1-1ubuntu2.
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# Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Common objects shared by all _ps* modules."""
from __future__ import division
import errno
import os
import socket
import stat
import sys
import warnings
from socket import AF_INET, SOCK_STREAM, SOCK_DGRAM
from psutil._compat import namedtuple, wraps
# --- constants
AF_INET6 = getattr(socket, 'AF_INET6', None)
AF_UNIX = getattr(socket, 'AF_UNIX', None)
STATUS_RUNNING = "running"
STATUS_SLEEPING = "sleeping"
STATUS_DISK_SLEEP = "disk-sleep"
STATUS_STOPPED = "stopped"
STATUS_TRACING_STOP = "tracing-stop"
STATUS_ZOMBIE = "zombie"
STATUS_DEAD = "dead"
STATUS_WAKE_KILL = "wake-kill"
STATUS_WAKING = "waking"
STATUS_IDLE = "idle" # BSD
STATUS_LOCKED = "locked" # BSD
STATUS_WAITING = "waiting" # BSD
CONN_ESTABLISHED = "ESTABLISHED"
CONN_SYN_SENT = "SYN_SENT"
CONN_SYN_RECV = "SYN_RECV"
CONN_FIN_WAIT1 = "FIN_WAIT1"
CONN_FIN_WAIT2 = "FIN_WAIT2"
CONN_TIME_WAIT = "TIME_WAIT"
CONN_CLOSE = "CLOSE"
CONN_CLOSE_WAIT = "CLOSE_WAIT"
CONN_LAST_ACK = "LAST_ACK"
CONN_LISTEN = "LISTEN"
CONN_CLOSING = "CLOSING"
CONN_NONE = "NONE"
# --- functions
def usage_percent(used, total, _round=None):
"""Calculate percentage usage of 'used' against 'total'."""
try:
ret = (used / total) * 100
except ZeroDivisionError:
ret = 0
if _round is not None:
return round(ret, _round)
else:
return ret
def memoize(f):
"""A simple memoize decorator for functions."""
cache = {}
def memf(*x):
if x not in cache:
cache[x] = f(*x)
return cache[x]
return memf
class cached_property(object):
"""A memoize decorator for class properties."""
enabled = True
def __init__(self, func):
self.func = func
def __get__(self, instance, type):
ret = self.func(instance)
if self.enabled:
instance.__dict__[self.func.__name__] = ret
return ret
# http://goo.gl/jYLvf
def deprecated(replacement=None):
"""A decorator which can be used to mark functions as deprecated."""
def outer(fun):
msg = "psutil.%s is deprecated" % fun.__name__
if replacement is not None:
msg += "; use %s instead" % replacement
if fun.__doc__ is None:
fun.__doc__ = msg
@wraps(fun)
def inner(*args, **kwargs):
warnings.warn(msg, category=DeprecationWarning, stacklevel=2)
return fun(*args, **kwargs)
return inner
return outer
def isfile_strict(path):
"""Same as os.path.isfile() but does not swallow EACCES / EPERM
exceptions, see:
http://mail.python.org/pipermail/python-dev/2012-June/120787.html
"""
try:
st = os.stat(path)
except OSError:
err = sys.exc_info()[1]
if err.errno in (errno.EPERM, errno.EACCES):
raise
return False
else:
return stat.S_ISREG(st.st_mode)
# --- Process.get_connections() 'kind' parameter mapping
conn_tmap = {
"all": ([AF_INET, AF_INET6, AF_UNIX], [SOCK_STREAM, SOCK_DGRAM]),
"tcp": ([AF_INET, AF_INET6], [SOCK_STREAM]),
"tcp4": ([AF_INET], [SOCK_STREAM]),
"udp": ([AF_INET, AF_INET6], [SOCK_DGRAM]),
"udp4": ([AF_INET], [SOCK_DGRAM]),
"inet": ([AF_INET, AF_INET6], [SOCK_STREAM, SOCK_DGRAM]),
"inet4": ([AF_INET], [SOCK_STREAM, SOCK_DGRAM]),
"inet6": ([AF_INET6], [SOCK_STREAM, SOCK_DGRAM]),
}
if AF_INET6 is not None:
conn_tmap.update({
"tcp6": ([AF_INET6], [SOCK_STREAM]),
"udp6": ([AF_INET6], [SOCK_DGRAM]),
})
if AF_UNIX is not None:
conn_tmap.update({
"unix": ([AF_UNIX], [SOCK_STREAM, SOCK_DGRAM]),
})
del AF_INET, AF_INET6, AF_UNIX, SOCK_STREAM, SOCK_DGRAM, socket
# --- namedtuples
# system
nt_sysmeminfo = namedtuple('usage', 'total used free percent')
# XXX - would 'available' be better than 'free' as for virtual_memory() nt?
nt_swapmeminfo = namedtuple('swap', 'total used free percent sin sout')
nt_diskinfo = namedtuple('usage', 'total used free percent')
nt_partition = namedtuple('partition', 'device mountpoint fstype opts')
nt_net_iostat = namedtuple(
'iostat',
'bytes_sent bytes_recv packets_sent packets_recv errin errout dropin dropout')
nt_disk_iostat = namedtuple(
'iostat',
'read_count write_count read_bytes write_bytes read_time write_time')
nt_user = namedtuple('user', 'name terminal host started')
# processes
nt_meminfo = namedtuple('meminfo', 'rss vms')
nt_cputimes = namedtuple('cputimes', 'user system')
nt_openfile = namedtuple('openfile', 'path fd')
nt_thread = namedtuple('thread', 'id user_time system_time')
nt_uids = namedtuple('user', 'real effective saved')
nt_gids = namedtuple('group', 'real effective saved')
nt_io = namedtuple('io', 'read_count write_count read_bytes write_bytes')
nt_ionice = namedtuple('ionice', 'ioclass value')
nt_ctxsw = namedtuple('amount', 'voluntary involuntary')
# --- misc
# backward compatibility layer for Process.get_connections() ntuple
class nt_connection(namedtuple('connection',
'fd family type laddr raddr status')):
__slots__ = ()
@property
def local_address(self):
warnings.warn("'local_address' field is deprecated; use 'laddr'"
"instead", category=DeprecationWarning, stacklevel=2)
return self.laddr
@property
def remote_address(self):
warnings.warn("'remote_address' field is deprecated; use 'raddr'"
"instead", category=DeprecationWarning, stacklevel=2)
return self.raddr
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