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_common.py

# 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, print_function

import contextlib
import errno
import functools
import os
import socket
import stat
import sys
import threading
import warnings
from collections import defaultdict
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

if sys.version_info >= (3, 4):
    import enum
else:
    enum = None

# can't take it from _common.py as this script is imported by setup.py
PY3 = sys.version_info[0] == 3

__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",
    '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")
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'])
# 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 __init__(self, msg=""):
        Exception.__init__(self, msg)
        self.msg = msg

def __repr__(self):
        ret = "psutil.%s %s" % (self.__class__.__name__, self.msg)
        return ret.strip()

__str__ = __repr__

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, msg)
        self.pid = pid
        self.name = name
        self.msg = msg
        if msg is None:
            if name:
                details = "(pid=%s, name=%s)" % (self.pid, repr(self.name))
            else:
                details = "(pid=%s)" % self.pid
            self.msg = "process no longer exists " + details

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, msg)
        self.pid = pid
        self.ppid = ppid
        self.name = name
        self.msg = msg
        if msg is None:
            args = ["pid=%s" % pid]
            if name:
                args.append("name=%s" % repr(self.name))
            if ppid:
                args.append("ppid=%s" % self.ppid)
            details = "(%s)" % ", ".join(args)
            self.msg = "process still exists but it's a zombie " + details

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, msg)
        self.pid = pid
        self.name = name
        self.msg = msg
        if msg is None:
            if (pid is not None) and (name is not None):
                self.msg = "(pid=%s, name=%s)" % (pid, repr(name))
            elif (pid is not None):
                self.msg = "(pid=%s)" % self.pid
            else:
                self.msg = ""

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, "timeout after %s seconds" % seconds)
        self.seconds = seconds
        self.pid = pid
        self.name = name
        if (pid is not None) and (name is not None):
            self.msg += " (pid=%s, name=%s)" % (pid, repr(name))
        elif (pid is not None):
            self.msg += " (pid=%s)" % self.pid

# ===================================================================
# --- utils
# ===================================================================

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()
    >>>
    """
    @functools.wraps(fun)
    def wrapper(*args, **kwargs):
        key = (args, frozenset(sorted(kwargs.items())))
        try:
            return cache[key]
        except KeyError:
            ret = cache[key] = fun(*args, **kwargs)
            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
            return fun(self)
        except KeyError:
            # case 3: we entered oneshot() ctx but there's no cache
            # for this entry yet
            ret = self._cache[fun] = fun(self)
        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] = defaultdict(int)
        self.reminder_keys[name] = 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.keys():
            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

def open_binary(fname, **kwargs):
    return open(fname, "rb", **kwargs)

def open_text(fname, **kwargs):
    """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 PY3:
        # See:
        # https://github.com/giampaolo/psutil/issues/675
        # https://github.com/giampaolo/psutil/pull/733
        kwargs.setdefault('encoding', ENCODING)
        kwargs.setdefault('errors', ENCODING_ERRS)
    return open(fname, "rt", **kwargs)

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 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)

if bool(os.getenv('PSUTIL_DEBUG', 0)):
    import inspect

def debug(msg):
        """If PSUTIL_DEBUG env var is set, print a debug message to stderr."""
        fname, lineno, func_name, lines, index = inspect.getframeinfo(
            inspect.currentframe().f_back)
        print("psutil-debug [%s:%s]> %s" % (fname, lineno, msg),  # NOQA
              file=sys.stderr)
else:
    def debug(msg):
        pass

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2025-08-05 07:34:10
..	dir	-	root/root	drwxr-xr-x	2025-11-11 11:43:27
__pycache__	dir	-	root/root	drwxr-xr-x	2025-08-05 07:34:18
tests	dir	-	root/root	drwxr-xr-x	2025-08-05 07:34:10
__init__.py	text/x-script.python	84.72 KB	root/root	-rw-r--r--	2025-07-04 01:31:01
_common.py	text/x-script.python	25.6 KB	root/root	-rw-r--r--	2025-07-04 01:31:01
_compat.py	text/x-script.python	14.13 KB	root/root	-rw-r--r--	2025-07-04 01:31:01
_psaix.py	text/x-script.python	18.12 KB	root/root	-rw-r--r--	2025-07-04 01:31:01
_psbsd.py	text/x-script.python	30.34 KB	root/root	-rw-r--r--	2025-07-04 01:31:01
_pslinux.py	text/x-script.python	80.18 KB	root/root	-rw-r--r--	2025-07-04 01:31:01
_psosx.py	text/x-script.python	17.08 KB	root/root	-rw-r--r--	2025-07-04 01:31:01
_psposix.py	text/x-script.python	7.86 KB	root/root	-rw-r--r--	2025-07-04 01:31:01
_pssunos.py	text/x-script.python	24.9 KB	root/root	-rw-r--r--	2025-07-04 01:31:01
_psutil_linux.cpython-311-x86_64-linux-gnu.so	application/x-pie-executable	28.39 KB	root/root	-rwxr-xr-x	2025-07-04 01:31:17
_psutil_posix.cpython-311-x86_64-linux-gnu.so	application/x-pie-executable	18.33 KB	root/root	-rwxr-xr-x	2025-07-04 01:31:17
_pswindows.py	text/x-script.python	35.98 KB	root/root	-rw-r--r--	2025-07-04 01:31:01