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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 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 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 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: 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.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 # 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, "rt", buffering=FILE_READ_BUFFER_SIZE) # See: # https://github.com/giampaolo/psutil/issues/675 # https://github.com/giampaolo/psutil/pull/733 fobj = open(fname, "rt", 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 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)
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