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File Name : _pswindows.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.

"""Windows platform implementation."""

import contextlib
import enum
import functools
import os
import signal
import sys
import threading
import time
from collections import namedtuple

from . import _common
from ._common import ENCODING
from ._common import AccessDenied
from ._common import NoSuchProcess
from ._common import TimeoutExpired
from ._common import conn_tmap
from ._common import conn_to_ntuple
from ._common import debug
from ._common import isfile_strict
from ._common import memoize
from ._common import memoize_when_activated
from ._common import parse_environ_block
from ._common import usage_percent
from ._psutil_windows import ABOVE_NORMAL_PRIORITY_CLASS
from ._psutil_windows import BELOW_NORMAL_PRIORITY_CLASS
from ._psutil_windows import HIGH_PRIORITY_CLASS
from ._psutil_windows import IDLE_PRIORITY_CLASS
from ._psutil_windows import NORMAL_PRIORITY_CLASS
from ._psutil_windows import REALTIME_PRIORITY_CLASS

try:
    from . import _psutil_windows as cext
except ImportError as err:
    if (
        str(err).lower().startswith("dll load failed")
        and sys.getwindowsversion()[0] < 6
    ):
        # We may get here if:
        # 1) we are on an old Windows version
        # 2) psutil was installed via pip + wheel
        # See: https://github.com/giampaolo/psutil/issues/811
        msg = "this Windows version is too old (< Windows Vista); "
        msg += "psutil 3.4.2 is the latest version which supports Windows "
        msg += "2000, XP and 2003 server"
        raise RuntimeError(msg) from err
    else:
        raise

# process priority constants, import from __init__.py:
# http://msdn.microsoft.com/en-us/library/ms686219(v=vs.85).aspx
# fmt: off
__extra__all__ = [
    "win_service_iter", "win_service_get",
    # Process priority
    "ABOVE_NORMAL_PRIORITY_CLASS", "BELOW_NORMAL_PRIORITY_CLASS",
    "HIGH_PRIORITY_CLASS", "IDLE_PRIORITY_CLASS", "NORMAL_PRIORITY_CLASS",
    "REALTIME_PRIORITY_CLASS",
    # IO priority
    "IOPRIO_VERYLOW", "IOPRIO_LOW", "IOPRIO_NORMAL", "IOPRIO_HIGH",
    # others
    "CONN_DELETE_TCB", "AF_LINK",
]
# fmt: on

# =====================================================================
# --- globals
# =====================================================================

CONN_DELETE_TCB = "DELETE_TCB"
ERROR_PARTIAL_COPY = 299
PYPY = '__pypy__' in sys.builtin_module_names

AddressFamily = enum.IntEnum('AddressFamily', {'AF_LINK': -1})
AF_LINK = AddressFamily.AF_LINK

TCP_STATUSES = {
    cext.MIB_TCP_STATE_ESTAB: _common.CONN_ESTABLISHED,
    cext.MIB_TCP_STATE_SYN_SENT: _common.CONN_SYN_SENT,
    cext.MIB_TCP_STATE_SYN_RCVD: _common.CONN_SYN_RECV,
    cext.MIB_TCP_STATE_FIN_WAIT1: _common.CONN_FIN_WAIT1,
    cext.MIB_TCP_STATE_FIN_WAIT2: _common.CONN_FIN_WAIT2,
    cext.MIB_TCP_STATE_TIME_WAIT: _common.CONN_TIME_WAIT,
    cext.MIB_TCP_STATE_CLOSED: _common.CONN_CLOSE,
    cext.MIB_TCP_STATE_CLOSE_WAIT: _common.CONN_CLOSE_WAIT,
    cext.MIB_TCP_STATE_LAST_ACK: _common.CONN_LAST_ACK,
    cext.MIB_TCP_STATE_LISTEN: _common.CONN_LISTEN,
    cext.MIB_TCP_STATE_CLOSING: _common.CONN_CLOSING,
    cext.MIB_TCP_STATE_DELETE_TCB: CONN_DELETE_TCB,
    cext.PSUTIL_CONN_NONE: _common.CONN_NONE,
}

class Priority(enum.IntEnum):
    ABOVE_NORMAL_PRIORITY_CLASS = ABOVE_NORMAL_PRIORITY_CLASS
    BELOW_NORMAL_PRIORITY_CLASS = BELOW_NORMAL_PRIORITY_CLASS
    HIGH_PRIORITY_CLASS = HIGH_PRIORITY_CLASS
    IDLE_PRIORITY_CLASS = IDLE_PRIORITY_CLASS
    NORMAL_PRIORITY_CLASS = NORMAL_PRIORITY_CLASS
    REALTIME_PRIORITY_CLASS = REALTIME_PRIORITY_CLASS

globals().update(Priority.__members__)

class IOPriority(enum.IntEnum):
    IOPRIO_VERYLOW = 0
    IOPRIO_LOW = 1
    IOPRIO_NORMAL = 2
    IOPRIO_HIGH = 3

globals().update(IOPriority.__members__)

pinfo_map = dict(
    num_handles=0,
    ctx_switches=1,
    user_time=2,
    kernel_time=3,
    create_time=4,
    num_threads=5,
    io_rcount=6,
    io_wcount=7,
    io_rbytes=8,
    io_wbytes=9,
    io_count_others=10,
    io_bytes_others=11,
    num_page_faults=12,
    peak_wset=13,
    wset=14,
    peak_paged_pool=15,
    paged_pool=16,
    peak_non_paged_pool=17,
    non_paged_pool=18,
    pagefile=19,
    peak_pagefile=20,
    mem_private=21,
)

# =====================================================================
# --- named tuples
# =====================================================================

# fmt: off
# psutil.cpu_times()
scputimes = namedtuple('scputimes',
                       ['user', 'system', 'idle', 'interrupt', 'dpc'])
# psutil.virtual_memory()
svmem = namedtuple('svmem', ['total', 'available', 'percent', 'used', 'free'])
# psutil.Process.memory_info()
pmem = namedtuple(
    'pmem', ['rss', 'vms',
             'num_page_faults', 'peak_wset', 'wset', 'peak_paged_pool',
             'paged_pool', 'peak_nonpaged_pool', 'nonpaged_pool',
             'pagefile', 'peak_pagefile', 'private'])
# psutil.Process.memory_full_info()
pfullmem = namedtuple('pfullmem', pmem._fields + ('uss', ))
# psutil.Process.memory_maps(grouped=True)
pmmap_grouped = namedtuple('pmmap_grouped', ['path', 'rss'])
# psutil.Process.memory_maps(grouped=False)
pmmap_ext = namedtuple(
    'pmmap_ext', 'addr perms ' + ' '.join(pmmap_grouped._fields))
# psutil.Process.io_counters()
pio = namedtuple('pio', ['read_count', 'write_count',
                         'read_bytes', 'write_bytes',
                         'other_count', 'other_bytes'])
# fmt: on

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

@functools.lru_cache(maxsize=512)
def convert_dos_path(s):
    r"""Convert paths using native DOS format like:
        "\Device\HarddiskVolume1\Windows\systemew\file.txt" or
        "\??\C:\Windows\systemew\file.txt"
    into:
        "C:\Windows\systemew\file.txt".
    """
    if s.startswith('\\\\'):
        return s
    rawdrive = '\\'.join(s.split('\\')[:3])
    if rawdrive in {"\\??\\UNC", "\\Device\\Mup"}:
        rawdrive = '\\'.join(s.split('\\')[:5])
        driveletter = '\\\\' + '\\'.join(s.split('\\')[3:5])
    elif rawdrive.startswith('\\??\\'):
        driveletter = s.split('\\')[2]
    else:
        driveletter = cext.QueryDosDevice(rawdrive)
    remainder = s[len(rawdrive) :]
    return os.path.join(driveletter, remainder)

@memoize
def getpagesize():
    return cext.getpagesize()

# =====================================================================
# --- memory
# =====================================================================

def virtual_memory():
    """System virtual memory as a namedtuple."""
    mem = cext.virtual_mem()
    totphys, availphys, _totsys, _availsys = mem
    total = totphys
    avail = availphys
    free = availphys
    used = total - avail
    percent = usage_percent((total - avail), total, round_=1)
    return svmem(total, avail, percent, used, free)

def swap_memory():
    """Swap system memory as a (total, used, free, sin, sout) tuple."""
    mem = cext.virtual_mem()

total_phys = mem[0]
    total_system = mem[2]

# system memory (commit total/limit) is the sum of physical and swap
    # thus physical memory values need to be subtracted to get swap values
    total = total_system - total_phys
    # commit total is incremented immediately (decrementing free_system)
    # while the corresponding free physical value is not decremented until
    # pages are accessed, so we can't use free system memory for swap.
    # instead, we calculate page file usage based on performance counter
    if total > 0:
        percentswap = cext.swap_percent()
        used = int(0.01 * percentswap * total)
    else:
        percentswap = 0.0
        used = 0

free = total - used
    percent = round(percentswap, 1)
    return _common.sswap(total, used, free, percent, 0, 0)

# =====================================================================
# --- disk
# =====================================================================

disk_io_counters = cext.disk_io_counters

def disk_usage(path):
    """Return disk usage associated with path."""
    if isinstance(path, bytes):
        # XXX: do we want to use "strict"? Probably yes, in order
        # to fail immediately. After all we are accepting input here...
        path = path.decode(ENCODING, errors="strict")
    total, used, free = cext.disk_usage(path)
    percent = usage_percent(used, total, round_=1)
    return _common.sdiskusage(total, used, free, percent)

def disk_partitions(all):
    """Return disk partitions."""
    rawlist = cext.disk_partitions(all)
    return [_common.sdiskpart(*x) for x in rawlist]

# =====================================================================
# --- CPU
# =====================================================================

def cpu_times():
    """Return system CPU times as a named tuple."""
    user, system, idle = cext.cpu_times()
    # Internally, GetSystemTimes() is used, and it doesn't return
    # interrupt and dpc times. cext.per_cpu_times() does, so we
    # rely on it to get those only.
    percpu_summed = scputimes(*[sum(n) for n in zip(*cext.per_cpu_times())])
    return scputimes(
        user, system, idle, percpu_summed.interrupt, percpu_summed.dpc
    )

def per_cpu_times():
    """Return system per-CPU times as a list of named tuples."""
    ret = []
    for user, system, idle, interrupt, dpc in cext.per_cpu_times():
        item = scputimes(user, system, idle, interrupt, dpc)
        ret.append(item)
    return ret

def cpu_count_logical():
    """Return the number of logical CPUs in the system."""
    return cext.cpu_count_logical()

def cpu_count_cores():
    """Return the number of CPU cores in the system."""
    return cext.cpu_count_cores()

def cpu_stats():
    """Return CPU statistics."""
    ctx_switches, interrupts, _dpcs, syscalls = cext.cpu_stats()
    soft_interrupts = 0
    return _common.scpustats(
        ctx_switches, interrupts, soft_interrupts, syscalls
    )

def cpu_freq():
    """Return CPU frequency.
    On Windows per-cpu frequency is not supported.
    """
    curr, max_ = cext.cpu_freq()
    min_ = 0.0
    return [_common.scpufreq(float(curr), min_, float(max_))]

_loadavg_initialized = False
_lock = threading.Lock()

def _getloadavg_impl():
    # Drop to 2 decimal points which is what Linux does
    raw_loads = cext.getloadavg()
    return tuple(round(load, 2) for load in raw_loads)

def getloadavg():
    """Return the number of processes in the system run queue averaged
    over the last 1, 5, and 15 minutes respectively as a tuple.
    """
    global _loadavg_initialized

if _loadavg_initialized:
        return _getloadavg_impl()

with _lock:
        if not _loadavg_initialized:
            cext.init_loadavg_counter()
            _loadavg_initialized = True

return _getloadavg_impl()

# =====================================================================
# --- network
# =====================================================================

def net_connections(kind, _pid=-1):
    """Return socket connections.  If pid == -1 return system-wide
    connections (as opposed to connections opened by one process only).
    """
    families, types = conn_tmap[kind]
    rawlist = cext.net_connections(_pid, families, types)
    ret = set()
    for item in rawlist:
        fd, fam, type, laddr, raddr, status, pid = item
        nt = conn_to_ntuple(
            fd,
            fam,
            type,
            laddr,
            raddr,
            status,
            TCP_STATUSES,
            pid=pid if _pid == -1 else None,
        )
        ret.add(nt)
    return list(ret)

def net_if_stats():
    """Get NIC stats (isup, duplex, speed, mtu)."""
    ret = {}
    rawdict = cext.net_if_stats()
    for name, items in rawdict.items():
        isup, duplex, speed, mtu = items
        if hasattr(_common, 'NicDuplex'):
            duplex = _common.NicDuplex(duplex)
        ret[name] = _common.snicstats(isup, duplex, speed, mtu, '')
    return ret

def net_io_counters():
    """Return network I/O statistics for every network interface
    installed on the system as a dict of raw tuples.
    """
    return cext.net_io_counters()

def net_if_addrs():
    """Return the addresses associated to each NIC."""
    return cext.net_if_addrs()

# =====================================================================
# --- sensors
# =====================================================================

def sensors_battery():
    """Return battery information."""
    # For constants meaning see:
    # https://msdn.microsoft.com/en-us/library/windows/desktop/
    #     aa373232(v=vs.85).aspx
    acline_status, flags, percent, secsleft = cext.sensors_battery()
    power_plugged = acline_status == 1
    no_battery = bool(flags & 128)
    charging = bool(flags & 8)

if no_battery:
        return None
    if power_plugged or charging:
        secsleft = _common.POWER_TIME_UNLIMITED
    elif secsleft == -1:
        secsleft = _common.POWER_TIME_UNKNOWN

return _common.sbattery(percent, secsleft, power_plugged)

# =====================================================================
# --- other system functions
# =====================================================================

_last_btime = 0

def boot_time():
    """The system boot time expressed in seconds since the epoch. This
    also includes the time spent during hybernate / suspend.
    """
    # This dirty hack is to adjust the precision of the returned
    # value which may have a 1 second fluctuation, see:
    # https://github.com/giampaolo/psutil/issues/1007
    global _last_btime
    ret = time.time() - cext.uptime()
    if abs(ret - _last_btime) <= 1:
        return _last_btime
    else:
        _last_btime = ret
        return ret

def users():
    """Return currently connected users as a list of namedtuples."""
    retlist = []
    rawlist = cext.users()
    for item in rawlist:
        user, hostname, tstamp = item
        nt = _common.suser(user, None, hostname, tstamp, None)
        retlist.append(nt)
    return retlist

# =====================================================================
# --- Windows services
# =====================================================================

def win_service_iter():
    """Yields a list of WindowsService instances."""
    for name, display_name in cext.winservice_enumerate():
        yield WindowsService(name, display_name)

def win_service_get(name):
    """Open a Windows service and return it as a WindowsService instance."""
    service = WindowsService(name, None)
    service._display_name = service._query_config()['display_name']
    return service

class WindowsService:  # noqa: PLW1641
    """Represents an installed Windows service."""

def __init__(self, name, display_name):
        self._name = name
        self._display_name = display_name

def __str__(self):
        details = f"(name={self._name!r}, display_name={self._display_name!r})"
        return f"{self.__class__.__name__}{details}"

def __repr__(self):
        return f"<{self.__str__()} at {id(self)}>"

def __eq__(self, other):
        # Test for equality with another WindosService object based
        # on name.
        if not isinstance(other, WindowsService):
            return NotImplemented
        return self._name == other._name

def __ne__(self, other):
        return not self == other

def _query_config(self):
        with self._wrap_exceptions():
            display_name, binpath, username, start_type = (
                cext.winservice_query_config(self._name)
            )
        # XXX - update _self.display_name?
        return dict(
            display_name=display_name,
            binpath=binpath,
            username=username,
            start_type=start_type,
        )

def _query_status(self):
        with self._wrap_exceptions():
            status, pid = cext.winservice_query_status(self._name)
        if pid == 0:
            pid = None
        return dict(status=status, pid=pid)

@contextlib.contextmanager
    def _wrap_exceptions(self):
        """Ctx manager which translates bare OSError and WindowsError
        exceptions into NoSuchProcess and AccessDenied.
        """
        try:
            yield
        except OSError as err:
            name = self._name
            if is_permission_err(err):
                msg = (
                    f"service {name!r} is not querable (not enough privileges)"
                )
                raise AccessDenied(pid=None, name=name, msg=msg) from err
            elif err.winerror in {
                cext.ERROR_INVALID_NAME,
                cext.ERROR_SERVICE_DOES_NOT_EXIST,
            }:
                msg = f"service {name!r} does not exist"
                raise NoSuchProcess(pid=None, name=name, msg=msg) from err
            else:
                raise

# config query

def name(self):
        """The service name. This string is how a service is referenced
        and can be passed to win_service_get() to get a new
        WindowsService instance.
        """
        return self._name

def display_name(self):
        """The service display name. The value is cached when this class
        is instantiated.
        """
        return self._display_name

def binpath(self):
        """The fully qualified path to the service binary/exe file as
        a string, including command line arguments.
        """
        return self._query_config()['binpath']

def username(self):
        """The name of the user that owns this service."""
        return self._query_config()['username']

def start_type(self):
        """A string which can either be "automatic", "manual" or
        "disabled".
        """
        return self._query_config()['start_type']

# status query

def pid(self):
        """The process PID, if any, else None. This can be passed
        to Process class to control the service's process.
        """
        return self._query_status()['pid']

def status(self):
        """Service status as a string."""
        return self._query_status()['status']

def description(self):
        """Service long description."""
        return cext.winservice_query_descr(self.name())

# utils

def as_dict(self):
        """Utility method retrieving all the information above as a
        dictionary.
        """
        d = self._query_config()
        d.update(self._query_status())
        d['name'] = self.name()
        d['display_name'] = self.display_name()
        d['description'] = self.description()
        return d

# actions
    # XXX: the necessary C bindings for start() and stop() are
    # implemented but for now I prefer not to expose them.
    # I may change my mind in the future. Reasons:
    # - they require Administrator privileges
    # - can't implement a timeout for stop() (unless by using a thread,
    #   which sucks)
    # - would require adding ServiceAlreadyStarted and
    #   ServiceAlreadyStopped exceptions, adding two new APIs.
    # - we might also want to have modify(), which would basically mean
    #   rewriting win32serviceutil.ChangeServiceConfig, which involves a
    #   lot of stuff (and API constants which would pollute the API), see:
    #   http://pyxr.sourceforge.net/PyXR/c/python24/lib/site-packages/
    #       win32/lib/win32serviceutil.py.html#0175
    # - psutil is typically about "read only" monitoring stuff;
    #   win_service_* APIs should only be used to retrieve a service and
    #   check whether it's running

# def start(self, timeout=None):
    #     with self._wrap_exceptions():
    #         cext.winservice_start(self.name())
    #         if timeout:
    #             giveup_at = time.time() + timeout
    #             while True:
    #                 if self.status() == "running":
    #                     return
    #                 else:
    #                     if time.time() > giveup_at:
    #                         raise TimeoutExpired(timeout)
    #                     else:
    #                         time.sleep(.1)

# def stop(self):
    #     # Note: timeout is not implemented because it's just not
    #     # possible, see:
    #     # http://stackoverflow.com/questions/11973228/
    #     with self._wrap_exceptions():
    #         return cext.winservice_stop(self.name())

# =====================================================================
# --- processes
# =====================================================================

pids = cext.pids
pid_exists = cext.pid_exists
ppid_map = cext.ppid_map  # used internally by Process.children()

def is_permission_err(exc):
    """Return True if this is a permission error."""
    assert isinstance(exc, OSError), exc
    return isinstance(exc, PermissionError) or exc.winerror in {
        cext.ERROR_ACCESS_DENIED,
        cext.ERROR_PRIVILEGE_NOT_HELD,
    }

def convert_oserror(exc, pid=None, name=None):
    """Convert OSError into NoSuchProcess or AccessDenied."""
    assert isinstance(exc, OSError), exc
    if is_permission_err(exc):
        return AccessDenied(pid=pid, name=name)
    if isinstance(exc, ProcessLookupError):
        return NoSuchProcess(pid=pid, name=name)
    raise exc

def wrap_exceptions(fun):
    """Decorator which converts OSError into NoSuchProcess or AccessDenied."""

@functools.wraps(fun)
    def wrapper(self, *args, **kwargs):
        try:
            return fun(self, *args, **kwargs)
        except OSError as err:
            raise convert_oserror(err, pid=self.pid, name=self._name) from err

return wrapper

def retry_error_partial_copy(fun):
    """Workaround for https://github.com/giampaolo/psutil/issues/875.
    See: https://stackoverflow.com/questions/4457745#4457745.
    """

@functools.wraps(fun)
    def wrapper(self, *args, **kwargs):
        delay = 0.0001
        times = 33
        for _ in range(times):  # retries for roughly 1 second
            try:
                return fun(self, *args, **kwargs)
            except OSError as _:
                err = _
                if err.winerror == ERROR_PARTIAL_COPY:
                    time.sleep(delay)
                    delay = min(delay * 2, 0.04)
                    continue
                raise
        msg = (
            f"{fun} retried {times} times, converted to AccessDenied as it's "
            f"still returning {err}"
        )
        raise AccessDenied(pid=self.pid, name=self._name, msg=msg)

return wrapper

class Process:
    """Wrapper class around underlying C implementation."""

__slots__ = ["_cache", "_name", "_ppid", "pid"]

def __init__(self, pid):
        self.pid = pid
        self._name = None
        self._ppid = None

# --- oneshot() stuff

def oneshot_enter(self):
        self._proc_info.cache_activate(self)
        self.exe.cache_activate(self)

def oneshot_exit(self):
        self._proc_info.cache_deactivate(self)
        self.exe.cache_deactivate(self)

@memoize_when_activated
    def _proc_info(self):
        """Return multiple information about this process as a
        raw tuple.
        """
        ret = cext.proc_info(self.pid)
        assert len(ret) == len(pinfo_map)
        return ret

def name(self):
        """Return process name, which on Windows is always the final
        part of the executable.
        """
        # This is how PIDs 0 and 4 are always represented in taskmgr
        # and process-hacker.
        if self.pid == 0:
            return "System Idle Process"
        if self.pid == 4:
            return "System"
        return os.path.basename(self.exe())

@wrap_exceptions
    @memoize_when_activated
    def exe(self):
        if PYPY:
            try:
                exe = cext.proc_exe(self.pid)
            except OSError as err:
                # 24 = ERROR_TOO_MANY_OPEN_FILES. Not sure why this happens
                # (perhaps PyPy's JIT delaying garbage collection of files?).
                if err.errno == 24:
                    debug(f"{err!r} translated into AccessDenied")
                    raise AccessDenied(self.pid, self._name) from err
                raise
        else:
            exe = cext.proc_exe(self.pid)
        if exe.startswith('\\'):
            return convert_dos_path(exe)
        return exe  # May be "Registry", "MemCompression", ...

@wrap_exceptions
    @retry_error_partial_copy
    def cmdline(self):
        if cext.WINVER >= cext.WINDOWS_8_1:
            # PEB method detects cmdline changes but requires more
            # privileges: https://github.com/giampaolo/psutil/pull/1398
            try:
                return cext.proc_cmdline(self.pid, use_peb=True)
            except OSError as err:
                if is_permission_err(err):
                    return cext.proc_cmdline(self.pid, use_peb=False)
                else:
                    raise
        else:
            return cext.proc_cmdline(self.pid, use_peb=True)

@wrap_exceptions
    @retry_error_partial_copy
    def environ(self):
        s = cext.proc_environ(self.pid)
        return parse_environ_block(s)

def ppid(self):
        try:
            return ppid_map()[self.pid]
        except KeyError:
            raise NoSuchProcess(self.pid, self._name) from None

def _get_raw_meminfo(self):
        try:
            return cext.proc_memory_info(self.pid)
        except OSError as err:
            if is_permission_err(err):
                # TODO: the C ext can probably be refactored in order
                # to get this from cext.proc_info()
                debug("attempting memory_info() fallback (slower)")
                info = self._proc_info()
                return (
                    info[pinfo_map['num_page_faults']],
                    info[pinfo_map['peak_wset']],
                    info[pinfo_map['wset']],
                    info[pinfo_map['peak_paged_pool']],
                    info[pinfo_map['paged_pool']],
                    info[pinfo_map['peak_non_paged_pool']],
                    info[pinfo_map['non_paged_pool']],
                    info[pinfo_map['pagefile']],
                    info[pinfo_map['peak_pagefile']],
                    info[pinfo_map['mem_private']],
                )
            raise

@wrap_exceptions
    def memory_info(self):
        # on Windows RSS == WorkingSetSize and VSM == PagefileUsage.
        # Underlying C function returns fields of PROCESS_MEMORY_COUNTERS
        # struct.
        t = self._get_raw_meminfo()
        rss = t[2]  # wset
        vms = t[7]  # pagefile
        return pmem(*(rss, vms) + t)

@wrap_exceptions
    def memory_full_info(self):
        basic_mem = self.memory_info()
        uss = cext.proc_memory_uss(self.pid)
        uss *= getpagesize()
        return pfullmem(*basic_mem + (uss,))

def memory_maps(self):
        try:
            raw = cext.proc_memory_maps(self.pid)
        except OSError as err:
            # XXX - can't use wrap_exceptions decorator as we're
            # returning a generator; probably needs refactoring.
            raise convert_oserror(err, self.pid, self._name) from err
        else:
            for addr, perm, path, rss in raw:
                path = convert_dos_path(path)
                addr = hex(addr)
                yield (addr, perm, path, rss)

@wrap_exceptions
    def kill(self):
        return cext.proc_kill(self.pid)

@wrap_exceptions
    def send_signal(self, sig):
        if sig == signal.SIGTERM:
            cext.proc_kill(self.pid)
        elif sig in {signal.CTRL_C_EVENT, signal.CTRL_BREAK_EVENT}:
            os.kill(self.pid, sig)
        else:
            msg = (
                "only SIGTERM, CTRL_C_EVENT and CTRL_BREAK_EVENT signals "
                "are supported on Windows"
            )
            raise ValueError(msg)

@wrap_exceptions
    def wait(self, timeout=None):
        if timeout is None:
            cext_timeout = cext.INFINITE
        else:
            # WaitForSingleObject() expects time in milliseconds.
            cext_timeout = int(timeout * 1000)

timer = getattr(time, 'monotonic', time.time)
        stop_at = timer() + timeout if timeout is not None else None

try:
            # Exit code is supposed to come from GetExitCodeProcess().
            # May also be None if OpenProcess() failed with
            # ERROR_INVALID_PARAMETER, meaning PID is already gone.
            exit_code = cext.proc_wait(self.pid, cext_timeout)
        except cext.TimeoutExpired as err:
            # WaitForSingleObject() returned WAIT_TIMEOUT. Just raise.
            raise TimeoutExpired(timeout, self.pid, self._name) from err
        except cext.TimeoutAbandoned:
            # WaitForSingleObject() returned WAIT_ABANDONED, see:
            # https://github.com/giampaolo/psutil/issues/1224
            # We'll just rely on the internal polling and return None
            # when the PID disappears. Subprocess module does the same
            # (return None):
            # https://github.com/python/cpython/blob/
            #     be50a7b627d0aa37e08fa8e2d5568891f19903ce/
            #     Lib/subprocess.py#L1193-L1194
            exit_code = None

# At this point WaitForSingleObject() returned WAIT_OBJECT_0,
        # meaning the process is gone. Stupidly there are cases where
        # its PID may still stick around so we do a further internal
        # polling.
        delay = 0.0001
        while True:
            if not pid_exists(self.pid):
                return exit_code
            if stop_at and timer() >= stop_at:
                raise TimeoutExpired(timeout, pid=self.pid, name=self._name)
            time.sleep(delay)
            delay = min(delay * 2, 0.04)  # incremental delay

@wrap_exceptions
    def username(self):
        if self.pid in {0, 4}:
            return 'NT AUTHORITY\\SYSTEM'
        domain, user = cext.proc_username(self.pid)
        return f"{domain}\\{user}"

@wrap_exceptions
    def create_time(self, fast_only=False):
        # Note: proc_times() not put under oneshot() 'cause create_time()
        # is already cached by the main Process class.
        try:
            _user, _system, created = cext.proc_times(self.pid)
            return created
        except OSError as err:
            if is_permission_err(err):
                if fast_only:
                    raise
                debug("attempting create_time() fallback (slower)")
                return self._proc_info()[pinfo_map['create_time']]
            raise

@wrap_exceptions
    def num_threads(self):
        return self._proc_info()[pinfo_map['num_threads']]

@wrap_exceptions
    def threads(self):
        rawlist = cext.proc_threads(self.pid)
        retlist = []
        for thread_id, utime, stime in rawlist:
            ntuple = _common.pthread(thread_id, utime, stime)
            retlist.append(ntuple)
        return retlist

@wrap_exceptions
    def cpu_times(self):
        try:
            user, system, _created = cext.proc_times(self.pid)
        except OSError as err:
            if not is_permission_err(err):
                raise
            debug("attempting cpu_times() fallback (slower)")
            info = self._proc_info()
            user = info[pinfo_map['user_time']]
            system = info[pinfo_map['kernel_time']]
        # Children user/system times are not retrievable (set to 0).
        return _common.pcputimes(user, system, 0.0, 0.0)

@wrap_exceptions
    def suspend(self):
        cext.proc_suspend_or_resume(self.pid, True)

@wrap_exceptions
    def resume(self):
        cext.proc_suspend_or_resume(self.pid, False)

@wrap_exceptions
    @retry_error_partial_copy
    def cwd(self):
        if self.pid in {0, 4}:
            raise AccessDenied(self.pid, self._name)
        # return a normalized pathname since the native C function appends
        # "\\" at the and of the path
        path = cext.proc_cwd(self.pid)
        return os.path.normpath(path)

@wrap_exceptions
    def open_files(self):
        if self.pid in {0, 4}:
            return []
        ret = set()
        # Filenames come in in native format like:
        # "\Device\HarddiskVolume1\Windows\systemew\file.txt"
        # Convert the first part in the corresponding drive letter
        # (e.g. "C:\") by using Windows's QueryDosDevice()
        raw_file_names = cext.proc_open_files(self.pid)
        for file in raw_file_names:
            file = convert_dos_path(file)
            if isfile_strict(file):
                ntuple = _common.popenfile(file, -1)
                ret.add(ntuple)
        return list(ret)

@wrap_exceptions
    def net_connections(self, kind='inet'):
        return net_connections(kind, _pid=self.pid)

@wrap_exceptions
    def nice_get(self):
        value = cext.proc_priority_get(self.pid)
        value = Priority(value)
        return value

@wrap_exceptions
    def nice_set(self, value):
        return cext.proc_priority_set(self.pid, value)

@wrap_exceptions
    def ionice_get(self):
        ret = cext.proc_io_priority_get(self.pid)
        ret = IOPriority(ret)
        return ret

@wrap_exceptions
    def ionice_set(self, ioclass, value):
        if value:
            msg = "value argument not accepted on Windows"
            raise TypeError(msg)
        if ioclass not in {
            IOPriority.IOPRIO_VERYLOW,
            IOPriority.IOPRIO_LOW,
            IOPriority.IOPRIO_NORMAL,
            IOPriority.IOPRIO_HIGH,
        }:
            msg = f"{ioclass} is not a valid priority"
            raise ValueError(msg)
        cext.proc_io_priority_set(self.pid, ioclass)

@wrap_exceptions
    def io_counters(self):
        try:
            ret = cext.proc_io_counters(self.pid)
        except OSError as err:
            if not is_permission_err(err):
                raise
            debug("attempting io_counters() fallback (slower)")
            info = self._proc_info()
            ret = (
                info[pinfo_map['io_rcount']],
                info[pinfo_map['io_wcount']],
                info[pinfo_map['io_rbytes']],
                info[pinfo_map['io_wbytes']],
                info[pinfo_map['io_count_others']],
                info[pinfo_map['io_bytes_others']],
            )
        return pio(*ret)

@wrap_exceptions
    def status(self):
        suspended = cext.proc_is_suspended(self.pid)
        if suspended:
            return _common.STATUS_STOPPED
        else:
            return _common.STATUS_RUNNING

@wrap_exceptions
    def cpu_affinity_get(self):
        def from_bitmask(x):
            return [i for i in range(64) if (1 << i) & x]

bitmask = cext.proc_cpu_affinity_get(self.pid)
        return from_bitmask(bitmask)

@wrap_exceptions
    def cpu_affinity_set(self, value):
        def to_bitmask(ls):
            if not ls:
                msg = f"invalid argument {ls!r}"
                raise ValueError(msg)
            out = 0
            for b in ls:
                out |= 2**b
            return out

# SetProcessAffinityMask() states that ERROR_INVALID_PARAMETER
        # is returned for an invalid CPU but this seems not to be true,
        # therefore we check CPUs validy beforehand.
        allcpus = list(range(len(per_cpu_times())))
        for cpu in value:
            if cpu not in allcpus:
                if not isinstance(cpu, int):
                    msg = f"invalid CPU {cpu!r}; an integer is required"
                    raise TypeError(msg)
                msg = f"invalid CPU {cpu!r}"
                raise ValueError(msg)

bitmask = to_bitmask(value)
        cext.proc_cpu_affinity_set(self.pid, bitmask)

@wrap_exceptions
    def num_handles(self):
        try:
            return cext.proc_num_handles(self.pid)
        except OSError as err:
            if is_permission_err(err):
                debug("attempting num_handles() fallback (slower)")
                return self._proc_info()[pinfo_map['num_handles']]
            raise

@wrap_exceptions
    def num_ctx_switches(self):
        ctx_switches = self._proc_info()[pinfo_map['ctx_switches']]
        # only voluntary ctx switches are supported
        return _common.pctxsw(ctx_switches, 0)

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2025-12-03 09:32:42
..	dir	-	root/root	0755	2025-12-03 09:32:43
__pycache__	dir	-	root/root	0755	2025-12-03 09:32:42
tests	dir	-	root/root	0755	2025-12-03 09:32:42
__init__.py	text/x-script.python	85.73 KB	root/root	0644	2025-12-03 09:32:42
_common.py	text/x-script.python	27.91 KB	root/root	0644	2025-12-03 09:32:42
_psaix.py	text/x-script.python	17.75 KB	root/root	0644	2025-12-03 09:32:42
_psbsd.py	text/x-script.python	29.98 KB	root/root	0644	2025-12-03 09:32:42
_pslinux.py	text/x-script.python	84.3 KB	root/root	0644	2025-12-03 09:32:42
_psosx.py	text/x-script.python	16.15 KB	root/root	0644	2025-12-03 09:32:42
_psposix.py	text/x-script.python	6.97 KB	root/root	0644	2025-12-03 09:32:42
_pssunos.py	text/x-script.python	24.27 KB	root/root	0644	2025-12-03 09:32:42
_psutil_linux.abi3.so	application/x-pie-executable	142.66 KB	root/root	0755	2025-12-03 09:32:42
_pswindows.py	text/x-script.python	35.68 KB	root/root	0644	2025-12-03 09:32:42

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