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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. """macOS platform implementation.""" import contextlib import errno import functools import os from collections import namedtuple from . import _common from . import _psposix from . import _psutil_osx as cext from . import _psutil_posix as cext_posix from ._common import AccessDenied from ._common import conn_tmap from ._common import conn_to_ntuple from ._common import isfile_strict from ._common import memoize_when_activated from ._common import NoSuchProcess from ._common import parse_environ_block from ._common import usage_percent from ._common import ZombieProcess from ._compat import PermissionError from ._compat import ProcessLookupError __extra__all__ = [] # ===================================================================== # --- globals # ===================================================================== PAGESIZE = cext_posix.getpagesize() AF_LINK = cext_posix.AF_LINK TCP_STATUSES = { cext.TCPS_ESTABLISHED: _common.CONN_ESTABLISHED, cext.TCPS_SYN_SENT: _common.CONN_SYN_SENT, cext.TCPS_SYN_RECEIVED: _common.CONN_SYN_RECV, cext.TCPS_FIN_WAIT_1: _common.CONN_FIN_WAIT1, cext.TCPS_FIN_WAIT_2: _common.CONN_FIN_WAIT2, cext.TCPS_TIME_WAIT: _common.CONN_TIME_WAIT, cext.TCPS_CLOSED: _common.CONN_CLOSE, cext.TCPS_CLOSE_WAIT: _common.CONN_CLOSE_WAIT, cext.TCPS_LAST_ACK: _common.CONN_LAST_ACK, cext.TCPS_LISTEN: _common.CONN_LISTEN, cext.TCPS_CLOSING: _common.CONN_CLOSING, cext.PSUTIL_CONN_NONE: _common.CONN_NONE, } PROC_STATUSES = { cext.SIDL: _common.STATUS_IDLE, cext.SRUN: _common.STATUS_RUNNING, cext.SSLEEP: _common.STATUS_SLEEPING, cext.SSTOP: _common.STATUS_STOPPED, cext.SZOMB: _common.STATUS_ZOMBIE, } kinfo_proc_map = dict( ppid=0, ruid=1, euid=2, suid=3, rgid=4, egid=5, sgid=6, ttynr=7, ctime=8, status=9, name=10, ) pidtaskinfo_map = dict( cpuutime=0, cpustime=1, rss=2, vms=3, pfaults=4, pageins=5, numthreads=6, volctxsw=7, ) # ===================================================================== # --- named tuples # ===================================================================== # psutil.cpu_times() scputimes = namedtuple('scputimes', ['user', 'nice', 'system', 'idle']) # psutil.virtual_memory() svmem = namedtuple( 'svmem', ['total', 'available', 'percent', 'used', 'free', 'active', 'inactive', 'wired']) # psutil.Process.memory_info() pmem = namedtuple('pmem', ['rss', 'vms', 'pfaults', 'pageins']) # psutil.Process.memory_full_info() pfullmem = namedtuple('pfullmem', pmem._fields + ('uss', )) # ===================================================================== # --- memory # ===================================================================== def virtual_memory(): """System virtual memory as a namedtuple.""" total, active, inactive, wired, free, speculative = cext.virtual_mem() # This is how Zabbix calculate avail and used mem: # https://github.com/zabbix/zabbix/blob/trunk/src/libs/zbxsysinfo/ # osx/memory.c # Also see: https://github.com/giampaolo/psutil/issues/1277 avail = inactive + free used = active + wired # This is NOT how Zabbix calculates free mem but it matches "free" # cmdline utility. free -= speculative percent = usage_percent((total - avail), total, round_=1) return svmem(total, avail, percent, used, free, active, inactive, wired) def swap_memory(): """Swap system memory as a (total, used, free, sin, sout) tuple.""" total, used, free, sin, sout = cext.swap_mem() percent = usage_percent(used, total, round_=1) return _common.sswap(total, used, free, percent, sin, sout) # ===================================================================== # --- CPU # ===================================================================== def cpu_times(): """Return system CPU times as a namedtuple.""" user, nice, system, idle = cext.cpu_times() return scputimes(user, nice, system, idle) def per_cpu_times(): """Return system CPU times as a named tuple""" ret = [] for cpu_t in cext.per_cpu_times(): user, nice, system, idle = cpu_t item = scputimes(user, nice, system, idle) 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_physical(): """Return the number of physical CPUs in the system.""" return cext.cpu_count_phys() def cpu_stats(): ctx_switches, interrupts, soft_interrupts, syscalls, traps = \ cext.cpu_stats() return _common.scpustats( ctx_switches, interrupts, soft_interrupts, syscalls) def cpu_freq(): """Return CPU frequency. On macOS per-cpu frequency is not supported. Also, the returned frequency never changes, see: https://arstechnica.com/civis/viewtopic.php?f=19&t=465002 """ curr, min_, max_ = cext.cpu_freq() return [_common.scpufreq(curr, min_, max_)] # ===================================================================== # --- disks # ===================================================================== disk_usage = _psposix.disk_usage disk_io_counters = cext.disk_io_counters def disk_partitions(all=False): """Return mounted disk partitions as a list of namedtuples.""" retlist = [] partitions = cext.disk_partitions() for partition in partitions: device, mountpoint, fstype, opts = partition if device == 'none': device = '' if not all: if not os.path.isabs(device) or not os.path.exists(device): continue maxfile = maxpath = None # set later ntuple = _common.sdiskpart(device, mountpoint, fstype, opts, maxfile, maxpath) retlist.append(ntuple) return retlist # ===================================================================== # --- sensors # ===================================================================== def sensors_battery(): """Return battery information.""" try: percent, minsleft, power_plugged = cext.sensors_battery() except NotImplementedError: # no power source - return None according to interface return None power_plugged = power_plugged == 1 if power_plugged: secsleft = _common.POWER_TIME_UNLIMITED elif minsleft == -1: secsleft = _common.POWER_TIME_UNKNOWN else: secsleft = minsleft * 60 return _common.sbattery(percent, secsleft, power_plugged) # ===================================================================== # --- network # ===================================================================== net_io_counters = cext.net_io_counters net_if_addrs = cext_posix.net_if_addrs def net_connections(kind='inet'): """System-wide network connections.""" # Note: on macOS this will fail with AccessDenied unless # the process is owned by root. ret = [] for pid in pids(): try: cons = Process(pid).connections(kind) except NoSuchProcess: continue else: if cons: for c in cons: c = list(c) + [pid] ret.append(_common.sconn(*c)) return ret def net_if_stats(): """Get NIC stats (isup, duplex, speed, mtu).""" names = net_io_counters().keys() ret = {} for name in names: try: mtu = cext_posix.net_if_mtu(name) isup = cext_posix.net_if_is_running(name) duplex, speed = cext_posix.net_if_duplex_speed(name) except OSError as err: # https://github.com/giampaolo/psutil/issues/1279 if err.errno != errno.ENODEV: raise else: if hasattr(_common, 'NicDuplex'): duplex = _common.NicDuplex(duplex) ret[name] = _common.snicstats(isup, duplex, speed, mtu) return ret # ===================================================================== # --- other system functions # ===================================================================== def boot_time(): """The system boot time expressed in seconds since the epoch.""" return cext.boot_time() def users(): """Return currently connected users as a list of namedtuples.""" retlist = [] rawlist = cext.users() for item in rawlist: user, tty, hostname, tstamp, pid = item if tty == '~': continue # reboot or shutdown if not tstamp: continue nt = _common.suser(user, tty or None, hostname or None, tstamp, pid) retlist.append(nt) return retlist # ===================================================================== # --- processes # ===================================================================== def pids(): ls = cext.pids() if 0 not in ls: # On certain macOS versions pids() C doesn't return PID 0 but # "ps" does and the process is querable via sysctl(): # https://travis-ci.org/giampaolo/psutil/jobs/309619941 try: Process(0).create_time() ls.insert(0, 0) except NoSuchProcess: pass except AccessDenied: ls.insert(0, 0) return ls pid_exists = _psposix.pid_exists def is_zombie(pid): try: st = cext.proc_kinfo_oneshot(pid)[kinfo_proc_map['status']] return st == cext.SZOMB except Exception: return False def wrap_exceptions(fun): """Decorator which translates bare OSError exceptions into NoSuchProcess and AccessDenied. """ @functools.wraps(fun) def wrapper(self, *args, **kwargs): try: return fun(self, *args, **kwargs) except ProcessLookupError: if is_zombie(self.pid): raise ZombieProcess(self.pid, self._name, self._ppid) else: raise NoSuchProcess(self.pid, self._name) except PermissionError: raise AccessDenied(self.pid, self._name) except cext.ZombieProcessError: raise ZombieProcess(self.pid, self._name, self._ppid) return wrapper @contextlib.contextmanager def catch_zombie(proc): """There are some poor C APIs which incorrectly raise ESRCH when the process is still alive or it's a zombie, or even RuntimeError (those who don't set errno). This is here in order to solve: https://github.com/giampaolo/psutil/issues/1044 """ try: yield except (OSError, RuntimeError) as err: if isinstance(err, RuntimeError) or err.errno == errno.ESRCH: try: # status() is not supposed to lie and correctly detect # zombies so if it raises ESRCH it's true. status = proc.status() except NoSuchProcess: raise err else: if status == _common.STATUS_ZOMBIE: raise ZombieProcess(proc.pid, proc._name, proc._ppid) else: raise AccessDenied(proc.pid, proc._name) else: raise class Process(object): """Wrapper class around underlying C implementation.""" __slots__ = ["pid", "_name", "_ppid", "_cache"] def __init__(self, pid): self.pid = pid self._name = None self._ppid = None @wrap_exceptions @memoize_when_activated def _get_kinfo_proc(self): # Note: should work with all PIDs without permission issues. ret = cext.proc_kinfo_oneshot(self.pid) assert len(ret) == len(kinfo_proc_map) return ret @wrap_exceptions @memoize_when_activated def _get_pidtaskinfo(self): # Note: should work for PIDs owned by user only. with catch_zombie(self): ret = cext.proc_pidtaskinfo_oneshot(self.pid) assert len(ret) == len(pidtaskinfo_map) return ret def oneshot_enter(self): self._get_kinfo_proc.cache_activate(self) self._get_pidtaskinfo.cache_activate(self) def oneshot_exit(self): self._get_kinfo_proc.cache_deactivate(self) self._get_pidtaskinfo.cache_deactivate(self) @wrap_exceptions def name(self): name = self._get_kinfo_proc()[kinfo_proc_map['name']] return name if name is not None else cext.proc_name(self.pid) @wrap_exceptions def exe(self): with catch_zombie(self): return cext.proc_exe(self.pid) @wrap_exceptions def cmdline(self): with catch_zombie(self): return cext.proc_cmdline(self.pid) @wrap_exceptions def environ(self): with catch_zombie(self): return parse_environ_block(cext.proc_environ(self.pid)) @wrap_exceptions def ppid(self): self._ppid = self._get_kinfo_proc()[kinfo_proc_map['ppid']] return self._ppid @wrap_exceptions def cwd(self): with catch_zombie(self): return cext.proc_cwd(self.pid) @wrap_exceptions def uids(self): rawtuple = self._get_kinfo_proc() return _common.puids( rawtuple[kinfo_proc_map['ruid']], rawtuple[kinfo_proc_map['euid']], rawtuple[kinfo_proc_map['suid']]) @wrap_exceptions def gids(self): rawtuple = self._get_kinfo_proc() return _common.puids( rawtuple[kinfo_proc_map['rgid']], rawtuple[kinfo_proc_map['egid']], rawtuple[kinfo_proc_map['sgid']]) @wrap_exceptions def terminal(self): tty_nr = self._get_kinfo_proc()[kinfo_proc_map['ttynr']] tmap = _psposix.get_terminal_map() try: return tmap[tty_nr] except KeyError: return None @wrap_exceptions def memory_info(self): rawtuple = self._get_pidtaskinfo() return pmem( rawtuple[pidtaskinfo_map['rss']], rawtuple[pidtaskinfo_map['vms']], rawtuple[pidtaskinfo_map['pfaults']], rawtuple[pidtaskinfo_map['pageins']], ) @wrap_exceptions def memory_full_info(self): basic_mem = self.memory_info() uss = cext.proc_memory_uss(self.pid) return pfullmem(*basic_mem + (uss, )) @wrap_exceptions def cpu_times(self): rawtuple = self._get_pidtaskinfo() return _common.pcputimes( rawtuple[pidtaskinfo_map['cpuutime']], rawtuple[pidtaskinfo_map['cpustime']], # children user / system times are not retrievable (set to 0) 0.0, 0.0) @wrap_exceptions def create_time(self): return self._get_kinfo_proc()[kinfo_proc_map['ctime']] @wrap_exceptions def num_ctx_switches(self): # Unvoluntary value seems not to be available; # getrusage() numbers seems to confirm this theory. # We set it to 0. vol = self._get_pidtaskinfo()[pidtaskinfo_map['volctxsw']] return _common.pctxsw(vol, 0) @wrap_exceptions def num_threads(self): return self._get_pidtaskinfo()[pidtaskinfo_map['numthreads']] @wrap_exceptions def open_files(self): if self.pid == 0: return [] files = [] with catch_zombie(self): rawlist = cext.proc_open_files(self.pid) for path, fd in rawlist: if isfile_strict(path): ntuple = _common.popenfile(path, fd) files.append(ntuple) return files @wrap_exceptions def connections(self, kind='inet'): if kind not in conn_tmap: raise ValueError("invalid %r kind argument; choose between %s" % (kind, ', '.join([repr(x) for x in conn_tmap]))) families, types = conn_tmap[kind] with catch_zombie(self): rawlist = cext.proc_connections(self.pid, families, types) ret = [] for item in rawlist: fd, fam, type, laddr, raddr, status = item nt = conn_to_ntuple(fd, fam, type, laddr, raddr, status, TCP_STATUSES) ret.append(nt) return ret @wrap_exceptions def num_fds(self): if self.pid == 0: return 0 with catch_zombie(self): return cext.proc_num_fds(self.pid) @wrap_exceptions def wait(self, timeout=None): return _psposix.wait_pid(self.pid, timeout, self._name) @wrap_exceptions def nice_get(self): with catch_zombie(self): return cext_posix.getpriority(self.pid) @wrap_exceptions def nice_set(self, value): with catch_zombie(self): return cext_posix.setpriority(self.pid, value) @wrap_exceptions def status(self): code = self._get_kinfo_proc()[kinfo_proc_map['status']] # XXX is '?' legit? (we're not supposed to return it anyway) return PROC_STATUSES.get(code, '?') @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
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