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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 __init__.py and _ps*.py modules."""
# Note: this module is imported by setup.py so it should not import
# psutil or third-party modules.
from __future__ import division
from __future__ import print_function
import collections
import contextlib
import errno
import functools
import os
import socket
import stat
import sys
import threading
import warnings
from collections import namedtuple
from socket import AF_INET
from socket import SOCK_DGRAM
from socket import SOCK_STREAM
try:
from socket import AF_INET6
except ImportError:
AF_INET6 = None
try:
from socket import AF_UNIX
except ImportError:
AF_UNIX = None
# can't take it from _common.py as this script is imported by setup.py
PY3 = sys.version_info[0] >= 3
if PY3:
import enum
else:
enum = None
PSUTIL_DEBUG = bool(os.getenv('PSUTIL_DEBUG'))
_DEFAULT = object()
__all__ = [
# OS constants
'FREEBSD', 'BSD', 'LINUX', 'NETBSD', 'OPENBSD', 'MACOS', 'OSX', 'POSIX',
'SUNOS', 'WINDOWS',
# connection constants
'CONN_CLOSE', 'CONN_CLOSE_WAIT', 'CONN_CLOSING', 'CONN_ESTABLISHED',
'CONN_FIN_WAIT1', 'CONN_FIN_WAIT2', 'CONN_LAST_ACK', 'CONN_LISTEN',
'CONN_NONE', 'CONN_SYN_RECV', 'CONN_SYN_SENT', 'CONN_TIME_WAIT',
# net constants
'NIC_DUPLEX_FULL', 'NIC_DUPLEX_HALF', 'NIC_DUPLEX_UNKNOWN',
# process status constants
'STATUS_DEAD', 'STATUS_DISK_SLEEP', 'STATUS_IDLE', 'STATUS_LOCKED',
'STATUS_RUNNING', 'STATUS_SLEEPING', 'STATUS_STOPPED', 'STATUS_SUSPENDED',
'STATUS_TRACING_STOP', 'STATUS_WAITING', 'STATUS_WAKE_KILL',
'STATUS_WAKING', 'STATUS_ZOMBIE', 'STATUS_PARKED',
# other constants
'ENCODING', 'ENCODING_ERRS', 'AF_INET6',
# named tuples
'pconn', 'pcputimes', 'pctxsw', 'pgids', 'pio', 'pionice', 'popenfile',
'pthread', 'puids', 'sconn', 'scpustats', 'sdiskio', 'sdiskpart',
'sdiskusage', 'snetio', 'snicaddr', 'snicstats', 'sswap', 'suser',
# utility functions
'conn_tmap', 'deprecated_method', 'isfile_strict', 'memoize',
'parse_environ_block', 'path_exists_strict', 'usage_percent',
'supports_ipv6', 'sockfam_to_enum', 'socktype_to_enum', "wrap_numbers",
'open_text', 'open_binary', 'cat', 'bcat',
'bytes2human', 'conn_to_ntuple', 'debug',
# shell utils
'hilite', 'term_supports_colors', 'print_color',
]
# ===================================================================
# --- OS constants
# ===================================================================
POSIX = os.name == "posix"
WINDOWS = os.name == "nt"
LINUX = sys.platform.startswith("linux")
MACOS = sys.platform.startswith("darwin")
OSX = MACOS # deprecated alias
FREEBSD = sys.platform.startswith(("freebsd", "midnightbsd"))
OPENBSD = sys.platform.startswith("openbsd")
NETBSD = sys.platform.startswith("netbsd")
BSD = FREEBSD or OPENBSD or NETBSD
SUNOS = sys.platform.startswith(("sunos", "solaris"))
AIX = sys.platform.startswith("aix")
# ===================================================================
# --- API constants
# ===================================================================
# Process.status()
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" # Linux, macOS, FreeBSD
STATUS_LOCKED = "locked" # FreeBSD
STATUS_WAITING = "waiting" # FreeBSD
STATUS_SUSPENDED = "suspended" # NetBSD
STATUS_PARKED = "parked" # Linux
# Process.connections() and psutil.net_connections()
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"
# net_if_stats()
if enum is None:
NIC_DUPLEX_FULL = 2
NIC_DUPLEX_HALF = 1
NIC_DUPLEX_UNKNOWN = 0
else:
class NicDuplex(enum.IntEnum):
NIC_DUPLEX_FULL = 2
NIC_DUPLEX_HALF = 1
NIC_DUPLEX_UNKNOWN = 0
globals().update(NicDuplex.__members__)
# sensors_battery()
if enum is None:
POWER_TIME_UNKNOWN = -1
POWER_TIME_UNLIMITED = -2
else:
class BatteryTime(enum.IntEnum):
POWER_TIME_UNKNOWN = -1
POWER_TIME_UNLIMITED = -2
globals().update(BatteryTime.__members__)
# --- others
ENCODING = sys.getfilesystemencoding()
if not PY3:
ENCODING_ERRS = "replace"
else:
try:
ENCODING_ERRS = sys.getfilesystemencodeerrors() # py 3.6
except AttributeError:
ENCODING_ERRS = "surrogateescape" if POSIX else "replace"
# ===================================================================
# --- namedtuples
# ===================================================================
# --- for system functions
# psutil.swap_memory()
sswap = namedtuple('sswap', ['total', 'used', 'free', 'percent', 'sin',
'sout'])
# psutil.disk_usage()
sdiskusage = namedtuple('sdiskusage', ['total', 'used', 'free', 'percent'])
# psutil.disk_io_counters()
sdiskio = namedtuple('sdiskio', ['read_count', 'write_count',
'read_bytes', 'write_bytes',
'read_time', 'write_time'])
# psutil.disk_partitions()
sdiskpart = namedtuple('sdiskpart', ['device', 'mountpoint', 'fstype', 'opts',
'maxfile', 'maxpath'])
# psutil.net_io_counters()
snetio = namedtuple('snetio', ['bytes_sent', 'bytes_recv',
'packets_sent', 'packets_recv',
'errin', 'errout',
'dropin', 'dropout'])
# psutil.users()
suser = namedtuple('suser', ['name', 'terminal', 'host', 'started', 'pid'])
# psutil.net_connections()
sconn = namedtuple('sconn', ['fd', 'family', 'type', 'laddr', 'raddr',
'status', 'pid'])
# psutil.net_if_addrs()
snicaddr = namedtuple('snicaddr',
['family', 'address', 'netmask', 'broadcast', 'ptp'])
# psutil.net_if_stats()
snicstats = namedtuple('snicstats',
['isup', 'duplex', 'speed', 'mtu', 'flags'])
# psutil.cpu_stats()
scpustats = namedtuple(
'scpustats', ['ctx_switches', 'interrupts', 'soft_interrupts', 'syscalls'])
# psutil.cpu_freq()
scpufreq = namedtuple('scpufreq', ['current', 'min', 'max'])
# psutil.sensors_temperatures()
shwtemp = namedtuple(
'shwtemp', ['label', 'current', 'high', 'critical'])
# psutil.sensors_battery()
sbattery = namedtuple('sbattery', ['percent', 'secsleft', 'power_plugged'])
# psutil.sensors_fans()
sfan = namedtuple('sfan', ['label', 'current'])
# --- for Process methods
# psutil.Process.cpu_times()
pcputimes = namedtuple('pcputimes',
['user', 'system', 'children_user', 'children_system'])
# psutil.Process.open_files()
popenfile = namedtuple('popenfile', ['path', 'fd'])
# psutil.Process.threads()
pthread = namedtuple('pthread', ['id', 'user_time', 'system_time'])
# psutil.Process.uids()
puids = namedtuple('puids', ['real', 'effective', 'saved'])
# psutil.Process.gids()
pgids = namedtuple('pgids', ['real', 'effective', 'saved'])
# psutil.Process.io_counters()
pio = namedtuple('pio', ['read_count', 'write_count',
'read_bytes', 'write_bytes'])
# psutil.Process.ionice()
pionice = namedtuple('pionice', ['ioclass', 'value'])
# psutil.Process.ctx_switches()
pctxsw = namedtuple('pctxsw', ['voluntary', 'involuntary'])
# psutil.Process.connections()
pconn = namedtuple('pconn', ['fd', 'family', 'type', 'laddr', 'raddr',
'status'])
# psutil.connections() and psutil.Process.connections()
addr = namedtuple('addr', ['ip', 'port'])
# ===================================================================
# --- Process.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]),
})
# =====================================================================
# --- Exceptions
# =====================================================================
class Error(Exception):
"""Base exception class. All other psutil exceptions inherit
from this one.
"""
__module__ = 'psutil'
def _infodict(self, attrs):
info = collections.OrderedDict()
for name in attrs:
value = getattr(self, name, None)
if value: # noqa
info[name] = value
elif name == "pid" and value == 0:
info[name] = value
return info
def __str__(self):
# invoked on `raise Error`
info = self._infodict(("pid", "ppid", "name"))
if info:
details = "(%s)" % ", ".join(
["%s=%r" % (k, v) for k, v in info.items()])
else:
details = None
return " ".join([x for x in (getattr(self, "msg", ""), details) if x])
def __repr__(self):
# invoked on `repr(Error)`
info = self._infodict(("pid", "ppid", "name", "seconds", "msg"))
details = ", ".join(["%s=%r" % (k, v) for k, v in info.items()])
return "psutil.%s(%s)" % (self.__class__.__name__, details)
class NoSuchProcess(Error):
"""Exception raised when a process with a certain PID doesn't
or no longer exists.
"""
__module__ = 'psutil'
def __init__(self, pid, name=None, msg=None):
Error.__init__(self)
self.pid = pid
self.name = name
self.msg = msg or "process no longer exists"
class ZombieProcess(NoSuchProcess):
"""Exception raised when querying a zombie process. This is
raised on macOS, BSD and Solaris only, and not always: depending
on the query the OS may be able to succeed anyway.
On Linux all zombie processes are querable (hence this is never
raised). Windows doesn't have zombie processes.
"""
__module__ = 'psutil'
def __init__(self, pid, name=None, ppid=None, msg=None):
NoSuchProcess.__init__(self, pid, name, msg)
self.ppid = ppid
self.msg = msg or "PID still exists but it's a zombie"
class AccessDenied(Error):
"""Exception raised when permission to perform an action is denied."""
__module__ = 'psutil'
def __init__(self, pid=None, name=None, msg=None):
Error.__init__(self)
self.pid = pid
self.name = name
self.msg = msg or ""
class TimeoutExpired(Error):
"""Raised on Process.wait(timeout) if timeout expires and process
is still alive.
"""
__module__ = 'psutil'
def __init__(self, seconds, pid=None, name=None):
Error.__init__(self)
self.seconds = seconds
self.pid = pid
self.name = name
self.msg = "timeout after %s seconds" % seconds
# ===================================================================
# --- utils
# ===================================================================
# This should be in _compat.py rather than here, but does not work well
# with setup.py importing this module via a sys.path trick.
if PY3:
if isinstance(__builtins__, dict): # cpython
exec_ = __builtins__["exec"]
else: # pypy
exec_ = getattr(__builtins__, "exec") # noqa
exec_("""def raise_from(value, from_value):
try:
raise value from from_value
finally:
value = None
""")
else:
def raise_from(value, from_value):
raise value
def usage_percent(used, total, round_=None):
"""Calculate percentage usage of 'used' against 'total'."""
try:
ret = (float(used) / total) * 100
except ZeroDivisionError:
return 0.0
else:
if round_ is not None:
ret = round(ret, round_)
return ret
def memoize(fun):
"""A simple memoize decorator for functions supporting (hashable)
positional arguments.
It also provides a cache_clear() function for clearing the cache:
>>> @memoize
... def foo()
... return 1
...
>>> foo()
1
>>> foo.cache_clear()
>>>
It supports:
- functions
- classes (acts as a @singleton)
- staticmethods
- classmethods
It does NOT support:
- methods
"""
@functools.wraps(fun)
def wrapper(*args, **kwargs):
key = (args, frozenset(sorted(kwargs.items())))
try:
return cache[key]
except KeyError:
try:
ret = cache[key] = fun(*args, **kwargs)
except Exception as err:
raise raise_from(err, None)
return ret
def cache_clear():
"""Clear cache."""
cache.clear()
cache = {}
wrapper.cache_clear = cache_clear
return wrapper
def memoize_when_activated(fun):
"""A memoize decorator which is disabled by default. It can be
activated and deactivated on request.
For efficiency reasons it can be used only against class methods
accepting no arguments.
>>> class Foo:
... @memoize
... def foo()
... print(1)
...
>>> f = Foo()
>>> # deactivated (default)
>>> foo()
1
>>> foo()
1
>>>
>>> # activated
>>> foo.cache_activate(self)
>>> foo()
1
>>> foo()
>>> foo()
>>>
"""
@functools.wraps(fun)
def wrapper(self):
try:
# case 1: we previously entered oneshot() ctx
ret = self._cache[fun]
except AttributeError:
# case 2: we never entered oneshot() ctx
try:
return fun(self)
except Exception as err:
raise raise_from(err, None)
except KeyError:
# case 3: we entered oneshot() ctx but there's no cache
# for this entry yet
try:
ret = fun(self)
except Exception as err:
raise raise_from(err, None)
try:
self._cache[fun] = ret
except AttributeError:
# multi-threading race condition, see:
# https://github.com/giampaolo/psutil/issues/1948
pass
return ret
def cache_activate(proc):
"""Activate cache. Expects a Process instance. Cache will be
stored as a "_cache" instance attribute.
"""
proc._cache = {}
def cache_deactivate(proc):
"""Deactivate and clear cache."""
try:
del proc._cache
except AttributeError:
pass
wrapper.cache_activate = cache_activate
wrapper.cache_deactivate = cache_deactivate
return wrapper
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 as err:
if err.errno in (errno.EPERM, errno.EACCES):
raise
return False
else:
return stat.S_ISREG(st.st_mode)
def path_exists_strict(path):
"""Same as os.path.exists() but does not swallow EACCES / EPERM
exceptions. See:
http://mail.python.org/pipermail/python-dev/2012-June/120787.html.
"""
try:
os.stat(path)
except OSError as err:
if err.errno in (errno.EPERM, errno.EACCES):
raise
return False
else:
return True
@memoize
def supports_ipv6():
"""Return True if IPv6 is supported on this platform."""
if not socket.has_ipv6 or AF_INET6 is None:
return False
try:
sock = socket.socket(AF_INET6, socket.SOCK_STREAM)
with contextlib.closing(sock):
sock.bind(("::1", 0))
return True
except socket.error:
return False
def parse_environ_block(data):
"""Parse a C environ block of environment variables into a dictionary."""
# The block is usually raw data from the target process. It might contain
# trailing garbage and lines that do not look like assignments.
ret = {}
pos = 0
# localize global variable to speed up access.
WINDOWS_ = WINDOWS
while True:
next_pos = data.find("\0", pos)
# nul byte at the beginning or double nul byte means finish
if next_pos <= pos:
break
# there might not be an equals sign
equal_pos = data.find("=", pos, next_pos)
if equal_pos > pos:
key = data[pos:equal_pos]
value = data[equal_pos + 1:next_pos]
# Windows expects environment variables to be uppercase only
if WINDOWS_:
key = key.upper()
ret[key] = value
pos = next_pos + 1
return ret
def sockfam_to_enum(num):
"""Convert a numeric socket family value to an IntEnum member.
If it's not a known member, return the numeric value itself.
"""
if enum is None:
return num
else: # pragma: no cover
try:
return socket.AddressFamily(num)
except ValueError:
return num
def socktype_to_enum(num):
"""Convert a numeric socket type value to an IntEnum member.
If it's not a known member, return the numeric value itself.
"""
if enum is None:
return num
else: # pragma: no cover
try:
return socket.SocketKind(num)
except ValueError:
return num
def conn_to_ntuple(fd, fam, type_, laddr, raddr, status, status_map, pid=None):
"""Convert a raw connection tuple to a proper ntuple."""
if fam in (socket.AF_INET, AF_INET6):
if laddr:
laddr = addr(*laddr)
if raddr:
raddr = addr(*raddr)
if type_ == socket.SOCK_STREAM and fam in (AF_INET, AF_INET6):
status = status_map.get(status, CONN_NONE)
else:
status = CONN_NONE # ignore whatever C returned to us
fam = sockfam_to_enum(fam)
type_ = socktype_to_enum(type_)
if pid is None:
return pconn(fd, fam, type_, laddr, raddr, status)
else:
return sconn(fd, fam, type_, laddr, raddr, status, pid)
def deprecated_method(replacement):
"""A decorator which can be used to mark a method as deprecated
'replcement' is the method name which will be called instead.
"""
def outer(fun):
msg = "%s() is deprecated and will be removed; use %s() instead" % (
fun.__name__, replacement)
if fun.__doc__ is None:
fun.__doc__ = msg
@functools.wraps(fun)
def inner(self, *args, **kwargs):
warnings.warn(msg, category=DeprecationWarning, stacklevel=2)
return getattr(self, replacement)(*args, **kwargs)
return inner
return outer
class _WrapNumbers:
"""Watches numbers so that they don't overflow and wrap
(reset to zero).
"""
def __init__(self):
self.lock = threading.Lock()
self.cache = {}
self.reminders = {}
self.reminder_keys = {}
def _add_dict(self, input_dict, name):
assert name not in self.cache
assert name not in self.reminders
assert name not in self.reminder_keys
self.cache[name] = input_dict
self.reminders[name] = collections.defaultdict(int)
self.reminder_keys[name] = collections.defaultdict(set)
def _remove_dead_reminders(self, input_dict, name):
"""In case the number of keys changed between calls (e.g. a
disk disappears) this removes the entry from self.reminders.
"""
old_dict = self.cache[name]
gone_keys = set(old_dict.keys()) - set(input_dict.keys())
for gone_key in gone_keys:
for remkey in self.reminder_keys[name][gone_key]:
del self.reminders[name][remkey]
del self.reminder_keys[name][gone_key]
def run(self, input_dict, name):
"""Cache dict and sum numbers which overflow and wrap.
Return an updated copy of `input_dict`.
"""
if name not in self.cache:
# This was the first call.
self._add_dict(input_dict, name)
return input_dict
self._remove_dead_reminders(input_dict, name)
old_dict = self.cache[name]
new_dict = {}
for key in input_dict:
input_tuple = input_dict[key]
try:
old_tuple = old_dict[key]
except KeyError:
# The input dict has a new key (e.g. a new disk or NIC)
# which didn't exist in the previous call.
new_dict[key] = input_tuple
continue
bits = []
for i in range(len(input_tuple)):
input_value = input_tuple[i]
old_value = old_tuple[i]
remkey = (key, i)
if input_value < old_value:
# it wrapped!
self.reminders[name][remkey] += old_value
self.reminder_keys[name][key].add(remkey)
bits.append(input_value + self.reminders[name][remkey])
new_dict[key] = tuple(bits)
self.cache[name] = input_dict
return new_dict
def cache_clear(self, name=None):
"""Clear the internal cache, optionally only for function 'name'."""
with self.lock:
if name is None:
self.cache.clear()
self.reminders.clear()
self.reminder_keys.clear()
else:
self.cache.pop(name, None)
self.reminders.pop(name, None)
self.reminder_keys.pop(name, None)
def cache_info(self):
"""Return internal cache dicts as a tuple of 3 elements."""
with self.lock:
return (self.cache, self.reminders, self.reminder_keys)
def wrap_numbers(input_dict, name):
"""Given an `input_dict` and a function `name`, adjust the numbers
which "wrap" (restart from zero) across different calls by adding
"old value" to "new value" and return an updated dict.
"""
with _wn.lock:
return _wn.run(input_dict, name)
_wn = _WrapNumbers()
wrap_numbers.cache_clear = _wn.cache_clear
wrap_numbers.cache_info = _wn.cache_info
# The read buffer size for open() builtin. This (also) dictates how
# much data we read(2) when iterating over file lines as in:
# >>> with open(file) as f:
# ... for line in f:
# ... ...
# Default per-line buffer size for binary files is 1K. For text files
# is 8K. We use a bigger buffer (32K) in order to have more consistent
# results when reading /proc pseudo files on Linux, see:
# https://github.com/giampaolo/psutil/issues/2050
# On Python 2 this also speeds up the reading of big files:
# (namely /proc/{pid}/smaps and /proc/net/*):
# https://github.com/giampaolo/psutil/issues/708
FILE_READ_BUFFER_SIZE = 32 * 1024
def open_binary(fname):
return open(fname, "rb", buffering=FILE_READ_BUFFER_SIZE)
def open_text(fname):
"""On Python 3 opens a file in text mode by using fs encoding and
a proper en/decoding errors handler.
On Python 2 this is just an alias for open(name, 'rt').
"""
if not PY3:
return open(fname, buffering=FILE_READ_BUFFER_SIZE)
# See:
# https://github.com/giampaolo/psutil/issues/675
# https://github.com/giampaolo/psutil/pull/733
fobj = open(fname, buffering=FILE_READ_BUFFER_SIZE,
encoding=ENCODING, errors=ENCODING_ERRS)
try:
# Dictates per-line read(2) buffer size. Defaults is 8k. See:
# https://github.com/giampaolo/psutil/issues/2050#issuecomment-1013387546
fobj._CHUNK_SIZE = FILE_READ_BUFFER_SIZE
except AttributeError:
pass
except Exception:
fobj.close()
raise
return fobj
def cat(fname, fallback=_DEFAULT, _open=open_text):
"""Read entire file content and return it as a string. File is
opened in text mode. If specified, `fallback` is the value
returned in case of error, either if the file does not exist or
it can't be read().
"""
if fallback is _DEFAULT:
with _open(fname) as f:
return f.read()
else:
try:
with _open(fname) as f:
return f.read()
except (IOError, OSError):
return fallback
def bcat(fname, fallback=_DEFAULT):
"""Same as above but opens file in binary mode."""
return cat(fname, fallback=fallback, _open=open_binary)
def bytes2human(n, format="%(value).1f%(symbol)s"):
"""Used by various scripts. See: http://goo.gl/zeJZl.
>>> bytes2human(10000)
'9.8K'
>>> bytes2human(100001221)
'95.4M'
"""
symbols = ('B', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
prefix = {}
for i, s in enumerate(symbols[1:]):
prefix[s] = 1 << (i + 1) * 10
for symbol in reversed(symbols[1:]):
if abs(n) >= prefix[symbol]:
value = float(n) / prefix[symbol]
return format % locals()
return format % dict(symbol=symbols[0], value=n)
def get_procfs_path():
"""Return updated psutil.PROCFS_PATH constant."""
return sys.modules['psutil'].PROCFS_PATH
if PY3:
def decode(s):
return s.decode(encoding=ENCODING, errors=ENCODING_ERRS)
else:
def decode(s):
return s
# =====================================================================
# --- shell utils
# =====================================================================
@memoize
def term_supports_colors(file=sys.stdout): # pragma: no cover
if os.name == 'nt':
return True
try:
import curses
assert file.isatty()
curses.setupterm()
assert curses.tigetnum("colors") > 0
except Exception:
return False
else:
return True
def hilite(s, color=None, bold=False): # pragma: no cover
"""Return an highlighted version of 'string'."""
if not term_supports_colors():
return s
attr = []
colors = dict(green='32', red='91', brown='33', yellow='93', blue='34',
violet='35', lightblue='36', grey='37', darkgrey='30')
colors[None] = '29'
try:
color = colors[color]
except KeyError:
raise ValueError("invalid color %r; choose between %s" % (
list(colors.keys())))
attr.append(color)
if bold:
attr.append('1')
return '\x1b[%sm%s\x1b[0m' % (';'.join(attr), s)
def print_color(
s, color=None, bold=False, file=sys.stdout): # pragma: no cover
"""Print a colorized version of string."""
if not term_supports_colors():
print(s, file=file) # NOQA
elif POSIX:
print(hilite(s, color, bold), file=file) # NOQA
else:
import ctypes
DEFAULT_COLOR = 7
GetStdHandle = ctypes.windll.Kernel32.GetStdHandle
SetConsoleTextAttribute = \
ctypes.windll.Kernel32.SetConsoleTextAttribute
colors = dict(green=2, red=4, brown=6, yellow=6)
colors[None] = DEFAULT_COLOR
try:
color = colors[color]
except KeyError:
raise ValueError("invalid color %r; choose between %r" % (
color, list(colors.keys())))
if bold and color <= 7:
color += 8
handle_id = -12 if file is sys.stderr else -11
GetStdHandle.restype = ctypes.c_ulong
handle = GetStdHandle(handle_id)
SetConsoleTextAttribute(handle, color)
try:
print(s, file=file) # NOQA
finally:
SetConsoleTextAttribute(handle, DEFAULT_COLOR)
def debug(msg):
"""If PSUTIL_DEBUG env var is set, print a debug message to stderr."""
if PSUTIL_DEBUG:
import inspect
fname, lineno, _, lines, index = inspect.getframeinfo(
inspect.currentframe().f_back)
if isinstance(msg, Exception):
if isinstance(msg, (OSError, IOError, EnvironmentError)):
# ...because str(exc) may contain info about the file name
msg = "ignoring %s" % msg
else:
msg = "ignoring %r" % msg
print("psutil-debug [%s:%s]> %s" % (fname, lineno, msg), # NOQA
file=sys.stderr)