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# Copyright (c) 2017, Arnon Yaari
# All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""AIX platform implementation."""
import functools
import glob
import os
import re
import subprocess
import sys
from collections import namedtuple
from . import _common
from . import _psposix
from . import _psutil_aix as cext
from . import _psutil_posix as cext_posix
from ._common import conn_to_ntuple
from ._common import get_procfs_path
from ._common import memoize_when_activated
from ._common import NIC_DUPLEX_FULL
from ._common import NIC_DUPLEX_HALF
from ._common import NIC_DUPLEX_UNKNOWN
from ._common import usage_percent
from ._compat import FileNotFoundError
from ._compat import PermissionError
from ._compat import ProcessLookupError
from ._compat import PY3
__extra__all__ = ["PROCFS_PATH"]
# =====================================================================
# --- globals
# =====================================================================
HAS_THREADS = hasattr(cext, "proc_threads")
HAS_NET_IO_COUNTERS = hasattr(cext, "net_io_counters")
HAS_PROC_IO_COUNTERS = hasattr(cext, "proc_io_counters")
PAGE_SIZE = os.sysconf('SC_PAGE_SIZE')
AF_LINK = cext_posix.AF_LINK
PROC_STATUSES = {
cext.SIDL: _common.STATUS_IDLE,
cext.SZOMB: _common.STATUS_ZOMBIE,
cext.SACTIVE: _common.STATUS_RUNNING,
cext.SSWAP: _common.STATUS_RUNNING, # TODO what status is this?
cext.SSTOP: _common.STATUS_STOPPED,
}
TCP_STATUSES = {
cext.TCPS_ESTABLISHED: _common.CONN_ESTABLISHED,
cext.TCPS_SYN_SENT: _common.CONN_SYN_SENT,
cext.TCPS_SYN_RCVD: _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_info_map = dict(
ppid=0,
rss=1,
vms=2,
create_time=3,
nice=4,
num_threads=5,
status=6,
ttynr=7)
# These objects get set on "import psutil" from the __init__.py
# file, see: https://github.com/giampaolo/psutil/issues/1402
NoSuchProcess = None
ZombieProcess = None
AccessDenied = None
TimeoutExpired = None
# =====================================================================
# --- named tuples
# =====================================================================
# psutil.Process.memory_info()
pmem = namedtuple('pmem', ['rss', 'vms'])
# psutil.Process.memory_full_info()
pfullmem = pmem
# psutil.Process.cpu_times()
scputimes = namedtuple('scputimes', ['user', 'system', 'idle', 'iowait'])
# psutil.virtual_memory()
svmem = namedtuple('svmem', ['total', 'available', 'percent', 'used', 'free'])
# =====================================================================
# --- memory
# =====================================================================
def virtual_memory():
total, avail, free, pinned, inuse = cext.virtual_mem()
percent = usage_percent((total - avail), total, round_=1)
return svmem(total, avail, percent, inuse, free)
def swap_memory():
"""Swap system memory as a (total, used, free, sin, sout) tuple."""
total, free, sin, sout = cext.swap_mem()
used = total - free
percent = usage_percent(used, total, round_=1)
return _common.sswap(total, used, free, percent, sin, sout)
# =====================================================================
# --- CPU
# =====================================================================
def cpu_times():
"""Return system-wide CPU times as a named tuple"""
ret = cext.per_cpu_times()
return scputimes(*[sum(x) for x in zip(*ret)])
def per_cpu_times():
"""Return system per-CPU times as a list of named tuples"""
ret = cext.per_cpu_times()
return [scputimes(*x) for x in ret]
def cpu_count_logical():
"""Return the number of logical CPUs in the system."""
try:
return os.sysconf("SC_NPROCESSORS_ONLN")
except ValueError:
# mimic os.cpu_count() behavior
return None
def cpu_count_physical():
cmd = "lsdev -Cc processor"
p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
stdout, stderr = p.communicate()
if PY3:
stdout, stderr = [x.decode(sys.stdout.encoding)
for x in (stdout, stderr)]
if p.returncode != 0:
raise RuntimeError("%r command error\n%s" % (cmd, stderr))
processors = stdout.strip().splitlines()
return len(processors) or None
def cpu_stats():
"""Return various CPU stats as a named tuple."""
ctx_switches, interrupts, soft_interrupts, syscalls = cext.cpu_stats()
return _common.scpustats(
ctx_switches, interrupts, soft_interrupts, syscalls)
# =====================================================================
# --- disks
# =====================================================================
disk_io_counters = cext.disk_io_counters
disk_usage = _psposix.disk_usage
def disk_partitions(all=False):
"""Return system disk partitions."""
# TODO - the filtering logic should be better checked so that
# it tries to reflect 'df' as much as possible
retlist = []
partitions = cext.disk_partitions()
for partition in partitions:
device, mountpoint, fstype, opts = partition
if device == 'none':
device = ''
if not all:
# Differently from, say, Linux, we don't have a list of
# common fs types so the best we can do, AFAIK, is to
# filter by filesystem having a total size > 0.
if not disk_usage(mountpoint).total:
continue
ntuple = _common.sdiskpart(device, mountpoint, fstype, opts)
retlist.append(ntuple)
return retlist
# =====================================================================
# --- network
# =====================================================================
net_if_addrs = cext_posix.net_if_addrs
if HAS_NET_IO_COUNTERS:
net_io_counters = cext.net_io_counters
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).
"""
cmap = _common.conn_tmap
if kind not in cmap:
raise ValueError("invalid %r kind argument; choose between %s"
% (kind, ', '.join([repr(x) for x in cmap])))
families, types = _common.conn_tmap[kind]
rawlist = cext.net_connections(_pid)
ret = []
for item in rawlist:
fd, fam, type_, laddr, raddr, status, pid = item
if fam not in families:
continue
if type_ not in types:
continue
nt = conn_to_ntuple(fd, fam, type_, laddr, raddr, status,
TCP_STATUSES, pid=pid if _pid == -1 else None)
ret.append(nt)
return ret
def net_if_stats():
"""Get NIC stats (isup, duplex, speed, mtu)."""
duplex_map = {"Full": NIC_DUPLEX_FULL,
"Half": NIC_DUPLEX_HALF}
names = set([x[0] for x in net_if_addrs()])
ret = {}
for name in names:
isup, mtu = cext.net_if_stats(name)
# try to get speed and duplex
# TODO: rewrite this in C (entstat forks, so use truss -f to follow.
# looks like it is using an undocumented ioctl?)
duplex = ""
speed = 0
p = subprocess.Popen(["/usr/bin/entstat", "-d", name],
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = p.communicate()
if PY3:
stdout, stderr = [x.decode(sys.stdout.encoding)
for x in (stdout, stderr)]
if p.returncode == 0:
re_result = re.search(
r"Running: (\d+) Mbps.*?(\w+) Duplex", stdout)
if re_result is not None:
speed = int(re_result.group(1))
duplex = re_result.group(2)
duplex = duplex_map.get(duplex, NIC_DUPLEX_UNKNOWN)
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()
localhost = (':0.0', ':0')
for item in rawlist:
user, tty, hostname, tstamp, user_process, pid = item
# note: the underlying C function includes entries about
# system boot, run level and others. We might want
# to use them in the future.
if not user_process:
continue
if hostname in localhost:
hostname = 'localhost'
nt = _common.suser(user, tty, hostname, tstamp, pid)
retlist.append(nt)
return retlist
# =====================================================================
# --- processes
# =====================================================================
def pids():
"""Returns a list of PIDs currently running on the system."""
return [int(x) for x in os.listdir(get_procfs_path()) if x.isdigit()]
def pid_exists(pid):
"""Check for the existence of a unix pid."""
return os.path.exists(os.path.join(get_procfs_path(), str(pid), "psinfo"))
def wrap_exceptions(fun):
"""Call callable into a try/except clause and translate ENOENT,
EACCES and EPERM in NoSuchProcess or AccessDenied exceptions.
"""
@functools.wraps(fun)
def wrapper(self, *args, **kwargs):
try:
return fun(self, *args, **kwargs)
except (FileNotFoundError, ProcessLookupError):
# ENOENT (no such file or directory) gets raised on open().
# ESRCH (no such process) can get raised on read() if
# process is gone in meantime.
if not pid_exists(self.pid):
raise NoSuchProcess(self.pid, self._name)
else:
raise ZombieProcess(self.pid, self._name, self._ppid)
except PermissionError:
raise AccessDenied(self.pid, self._name)
return wrapper
class Process(object):
"""Wrapper class around underlying C implementation."""
__slots__ = ["pid", "_name", "_ppid", "_procfs_path", "_cache"]
def __init__(self, pid):
self.pid = pid
self._name = None
self._ppid = None
self._procfs_path = get_procfs_path()
def oneshot_enter(self):
self._proc_basic_info.cache_activate(self)
self._proc_cred.cache_activate(self)
def oneshot_exit(self):
self._proc_basic_info.cache_deactivate(self)
self._proc_cred.cache_deactivate(self)
@wrap_exceptions
@memoize_when_activated
def _proc_basic_info(self):
return cext.proc_basic_info(self.pid, self._procfs_path)
@wrap_exceptions
@memoize_when_activated
def _proc_cred(self):
return cext.proc_cred(self.pid, self._procfs_path)
@wrap_exceptions
def name(self):
if self.pid == 0:
return "swapper"
# note: max 16 characters
return cext.proc_name(self.pid, self._procfs_path).rstrip("\x00")
@wrap_exceptions
def exe(self):
# there is no way to get executable path in AIX other than to guess,
# and guessing is more complex than what's in the wrapping class
cmdline = self.cmdline()
if not cmdline:
return ''
exe = cmdline[0]
if os.path.sep in exe:
# relative or absolute path
if not os.path.isabs(exe):
# if cwd has changed, we're out of luck - this may be wrong!
exe = os.path.abspath(os.path.join(self.cwd(), exe))
if (os.path.isabs(exe) and
os.path.isfile(exe) and
os.access(exe, os.X_OK)):
return exe
# not found, move to search in PATH using basename only
exe = os.path.basename(exe)
# search for exe name PATH
for path in os.environ["PATH"].split(":"):
possible_exe = os.path.abspath(os.path.join(path, exe))
if (os.path.isfile(possible_exe) and
os.access(possible_exe, os.X_OK)):
return possible_exe
return ''
@wrap_exceptions
def cmdline(self):
return cext.proc_args(self.pid)
@wrap_exceptions
def environ(self):
return cext.proc_environ(self.pid)
@wrap_exceptions
def create_time(self):
return self._proc_basic_info()[proc_info_map['create_time']]
@wrap_exceptions
def num_threads(self):
return self._proc_basic_info()[proc_info_map['num_threads']]
if HAS_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)
# The underlying C implementation retrieves all OS threads
# and filters them by PID. At this point we can't tell whether
# an empty list means there were no connections for process or
# process is no longer active so we force NSP in case the PID
# is no longer there.
if not retlist:
# will raise NSP if process is gone
os.stat('%s/%s' % (self._procfs_path, self.pid))
return retlist
@wrap_exceptions
def connections(self, kind='inet'):
ret = net_connections(kind, _pid=self.pid)
# The underlying C implementation retrieves all OS connections
# and filters them by PID. At this point we can't tell whether
# an empty list means there were no connections for process or
# process is no longer active so we force NSP in case the PID
# is no longer there.
if not ret:
# will raise NSP if process is gone
os.stat('%s/%s' % (self._procfs_path, self.pid))
return ret
@wrap_exceptions
def nice_get(self):
return cext_posix.getpriority(self.pid)
@wrap_exceptions
def nice_set(self, value):
return cext_posix.setpriority(self.pid, value)
@wrap_exceptions
def ppid(self):
self._ppid = self._proc_basic_info()[proc_info_map['ppid']]
return self._ppid
@wrap_exceptions
def uids(self):
real, effective, saved, _, _, _ = self._proc_cred()
return _common.puids(real, effective, saved)
@wrap_exceptions
def gids(self):
_, _, _, real, effective, saved = self._proc_cred()
return _common.puids(real, effective, saved)
@wrap_exceptions
def cpu_times(self):
cpu_times = cext.proc_cpu_times(self.pid, self._procfs_path)
return _common.pcputimes(*cpu_times)
@wrap_exceptions
def terminal(self):
ttydev = self._proc_basic_info()[proc_info_map['ttynr']]
# convert from 64-bit dev_t to 32-bit dev_t and then map the device
ttydev = (((ttydev & 0x0000FFFF00000000) >> 16) | (ttydev & 0xFFFF))
# try to match rdev of /dev/pts/* files ttydev
for dev in glob.glob("/dev/**/*"):
if os.stat(dev).st_rdev == ttydev:
return dev
return None
@wrap_exceptions
def cwd(self):
procfs_path = self._procfs_path
try:
result = os.readlink("%s/%s/cwd" % (procfs_path, self.pid))
return result.rstrip('/')
except FileNotFoundError:
os.stat("%s/%s" % (procfs_path, self.pid)) # raise NSP or AD
return None
@wrap_exceptions
def memory_info(self):
ret = self._proc_basic_info()
rss = ret[proc_info_map['rss']] * 1024
vms = ret[proc_info_map['vms']] * 1024
return pmem(rss, vms)
memory_full_info = memory_info
@wrap_exceptions
def status(self):
code = self._proc_basic_info()[proc_info_map['status']]
# XXX is '?' legit? (we're not supposed to return it anyway)
return PROC_STATUSES.get(code, '?')
def open_files(self):
# TODO rewrite without using procfiles (stat /proc/pid/fd/* and then
# find matching name of the inode)
p = subprocess.Popen(["/usr/bin/procfiles", "-n", str(self.pid)],
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = p.communicate()
if PY3:
stdout, stderr = [x.decode(sys.stdout.encoding)
for x in (stdout, stderr)]
if "no such process" in stderr.lower():
raise NoSuchProcess(self.pid, self._name)
procfiles = re.findall(r"(\d+): S_IFREG.*\s*.*name:(.*)\n", stdout)
retlist = []
for fd, path in procfiles:
path = path.strip()
if path.startswith("//"):
path = path[1:]
if path.lower() == "cannot be retrieved":
continue
retlist.append(_common.popenfile(path, int(fd)))
return retlist
@wrap_exceptions
def num_fds(self):
if self.pid == 0: # no /proc/0/fd
return 0
return len(os.listdir("%s/%s/fd" % (self._procfs_path, self.pid)))
@wrap_exceptions
def num_ctx_switches(self):
return _common.pctxsw(
*cext.proc_num_ctx_switches(self.pid))
@wrap_exceptions
def wait(self, timeout=None):
return _psposix.wait_pid(self.pid, timeout, self._name)
if HAS_PROC_IO_COUNTERS:
@wrap_exceptions
def io_counters(self):
try:
rc, wc, rb, wb = cext.proc_io_counters(self.pid)
except OSError:
# if process is terminated, proc_io_counters returns OSError
# instead of NSP
if not pid_exists(self.pid):
raise NoSuchProcess(self.pid, self._name)
raise
return _common.pio(rc, wc, rb, wb)