268 lines
7.6 KiB
Python
268 lines
7.6 KiB
Python
#
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# Copyright (C) 2004-2007 Swedish Institute of Computer Science.
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#
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# Please refer to the file named LICENSE in the same directory as this
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# file for licensing information.
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#
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# $Id: linux.py,v 1.1 2009/02/26 13:47:38 fros4943 Exp $
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import errno
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import glob
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import os
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import re
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import signal
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import string
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import time
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import chakana.command
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import chakana.error
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import chakana.utils
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from debug import *
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def numProcessors(physical = 0, cpuInfo = None):
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return Host().CpuInfo(cpuInfo).count(physical = physical)
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class CpuInfo:
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"Parser for /proc/cpuinfo."
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def __init__(self, cpuInfo = None):
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if cpuInfo is None:
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cpuInfo = chakana.utils.readFile("/proc/cpuinfo")
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self.__values = [map(string.strip, l.split(":"))
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for l in cpuInfo.splitlines()]
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def values(self):
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return self.__values
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def find(self, name):
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debug(Debug3, "Looking for " + name + " in cpuinfo:")
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ret = [val[1] for val in self.values() if val[0] == name]
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debug(Debug3, repr(ret))
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return ret
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class IfconfigInfo:
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"Parser for ifconfig output."
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def __init__(self, ifconfigOutput = None):
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if ifconfigOutput is None:
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self._ifconfigOutput = chakana.command.output("/sbin/ifconfig")
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else:
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self._ifconfigOutput = ifconfigOutput
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def interfaces(self):
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return map(InterfaceInfo,
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re.compile("^\\w+", re.M).findall(self._ifconfigOutput))
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class InterfaceInfo:
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"Parser for ifconfig output for a single interface."
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def __init__(self, interface = None, ifconfigOutput = None):
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if interface is None:
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self._interface = chakana.command.output("/sbin/ifconfig").split()[0]
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else:
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self._interface = interface
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if ifconfigOutput is None:
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self._ifconfigOutput = chakana.command.output("/sbin/ifconfig " +
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self._interface)
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else:
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self._ifconfigOutput = ifconfigOutput
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def name(self):
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return self._ifconfigOutput.split()[0]
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def address(self):
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match = re.search("inet addr:((\d{1,3}\.){3}\d{1,3})",
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self._ifconfigOutput)
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if match:
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return match.group(1)
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else:
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return None
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__str__ = name
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class MemInfo(dict):
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"Parser for /proc/meminfo"
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def __init__(self, memInfo = None):
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if memInfo is None:
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memInfo = chakana.utils.readFile("/proc/meminfo")
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for line in memInfo.splitlines():
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if len(line.split(":")) == 2:
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key, value = line.split(":")
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if len(value.strip().split()) <= 2:
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if len(value.strip().split()) == 2:
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unit = {"KB" : 1024, "MB" : 1024 * 1024,
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"GB" : 1024 * 1024 * 1024 }[value.split()[-1].upper()]
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else:
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unit = 1
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self[key] = long(value.strip().split()[0]) * unit
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class UnameInfo:
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"Parser for output from uname -a"
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def __init__(self, unameInfo = None):
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if unameInfo is None:
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unameInfo = chakana.command.output("uname -a")
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self._unameInfo = unameInfo.split()
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def __getitem__(self, i):
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return self._unameInfo[i]
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def __len__(self):
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return len(self._unameInfo)
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def __getattr__(self, attr):
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ret = self[self.indexMap()[attr]]
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if (attr == "architecture") and \
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(re.match(r"(.*intel|i[0-9]86)", ret, re.I)):
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# Work around bogus uname output from e.g. Gentoo
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return "i386"
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else:
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return ret
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def smp(self):
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return "SMP" in self._unameInfo
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def indexMap(self):
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return {
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"os" : 0,
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"host" : 1,
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"version" : 2,
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"architecture" : -2,
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}
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def __str__(self):
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return repr(dict([(attr, getattr(self, attr))
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for attr in self.indexMap()]))
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def __repr__(self):
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return repr(self._unameInfo)
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class X86:
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class CpuInfo(CpuInfo):
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def count(self, physical = 0):
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logical = len(self.find("processor"))
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if physical:
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siblings = self.find("siblings")
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if len(siblings) > 0:
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return logical / int(siblings[0])
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return logical
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def type(self, num = 0):
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return re.match(r"Intel(\(R\))? (.*) processor [\d]+MHz",
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self.find("model name")[num]).group(2)
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class X86_64(X86):
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pass
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class Sparc:
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class CpuInfo(CpuInfo):
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def count(self):
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return int(self.find("ncpus active")[0])
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def type(self, num = 0):
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return " ".join(self.find("cpu")[num].split()[1:3])
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class UnameInfo(UnameInfo):
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pass
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def freeSpace(path):
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"Return available disk space on device corresponding to path."
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# If the device name is long, df may split the relevant line, so
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# count lines and words from end.
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return long(
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chakana.command.output("df -k " + path).splitlines()[-1].split()[-3]) * 1024
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def macAddresses():
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"Return list of mac addresses for all network interfaces."
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return re.findall('..:..:..:..:..:..', os.popen(
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'/sbin/ifconfig -a | grep HWaddr', 'r').read().lower())
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class Process:
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"""Representation of a running process."""
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def __init__(self, pid):
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self._pid = pid
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def pid(self):
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return self._pid
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def attribute(self, name):
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try:
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lines = chakana.utils.readFile("/proc/" + str(self._pid) +
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"/status").splitlines()
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for line in lines:
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(key, value) = line.split(":", 1)
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if key.strip().lower() == name.lower():
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return value.strip()
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except EnvironmentError, err:
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if err.errno == errno.ENOENT:
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raise chakana.error.errnoError(errno.ESRCH)
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raise
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def name(self):
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return self.attribute("name")
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def parent(self):
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return Process(int(self.attribute("ppid")))
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def children(self):
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ret = []
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for proc in self.all():
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try:
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if proc.parent().pid() == self.pid():
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ret.append(proc)
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except EnvironmentError, err:
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if err.errno != errno.ESRCH:
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raise
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return ret
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def reallyKill(self, graceTime = 1, sigKillTime = 3, debugLevel = Event):
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"""Really kill process after waiting for graceTime. Send SIGKILL after
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sigKillTime."""
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try:
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debug(debugLevel, "Killing process " + str(self.pid()) +
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" (" + str(self.name()) + ")")
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os.kill(self.pid(), 0)
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time.sleep(graceTime)
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debug(debugLevel + 1, "kill -TERM " + str(self.pid()))
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os.kill(self.pid(), signal.SIGTERM)
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for tick in range(sigKillTime):
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os.kill(self.pid(), 0)
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debug(debugLevel + 1, "kill -KILL " + str(self.pid()))
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os.kill(self.pid(), signal.SIGKILL)
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time.sleep(graceTime)
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if self.attribute("state")[0] != "Z":
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debug(debugLevel, "Process refused to die: " + str(self.pid()) +
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" (" + self.name() + ")")
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except EnvironmentError, err:
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if err.errno != errno.ESRCH:
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raise
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debug(debugLevel + 2, "Pid " + str(self.pid()) + " no longer exists")
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def killAllBelow(self, debugLevel = Event, ** kwArgs):
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"""Kill all processes below (but not including) a process. Start from
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bottom of tree."""
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debug(debugLevel, "Killing all processes below " + str(self.pid()) +
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" (" + self.name() + ")")
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children = self.children()
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debug(debugLevel + 2, "Pid " + str(self.pid()) + " has " +
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str(len(children)) + " children")
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for child in children:
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child.killAllBelow(debugLevel = debugLevel, ** kwArgs)
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child.reallyKill(debugLevel = debugLevel, ** kwArgs)
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def all(cls):
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ret = []
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for statusFile in glob.glob("/proc/*/status"):
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try:
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ret.append(cls(int(os.path.basename(os.path.dirname(statusFile)))))
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except ValueError:
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continue
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return ret
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all = classmethod(all)
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def Host():
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architecture = chakana.command.output("uname -m").strip()
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if re.match("i[0-9]86", architecture):
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return X86
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elif architecture == "x86_64":
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return X86_64
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