an early version of chakana, an automated test framework used with COOJA

tools/chakana/linux.py

@@ -0,0 +1,268 @@
+#  
+#  Copyright (C) 2004-2007 Swedish Institute of Computer Science.
+#  
+# Please refer to the file named LICENSE in the same directory as this
+# file for licensing information.
+#  
+
+
+# $Id: linux.py,v 1.1 2007/08/21 14:41:01 fros4943 Exp $
+
+import errno
+import glob
+import os
+import re
+import signal
+import string
+import time
+
+import chakana.command
+import chakana.error
+import chakana.utils
+
+from debug import *
+
+def numProcessors(physical = 0, cpuInfo = None):
+  return Host().CpuInfo(cpuInfo).count(physical = physical)
+
+class CpuInfo:
+  "Parser for /proc/cpuinfo."
+  def __init__(self, cpuInfo = None):
+    if cpuInfo is None:
+      cpuInfo = chakana.utils.readFile("/proc/cpuinfo")
+    self.__values = [map(string.strip, l.split(":"))
+                     for l in cpuInfo.splitlines()]
+
+  def values(self):
+    return self.__values
+
+  def find(self, name):
+    debug(Debug3, "Looking for " + name + " in cpuinfo:")
+    ret = [val[1] for val in self.values() if val[0] == name]
+    debug(Debug3, repr(ret))
+    return ret
+
+class IfconfigInfo:
+  "Parser for ifconfig output."
+  def __init__(self, ifconfigOutput = None):
+    if ifconfigOutput is None:
+      self._ifconfigOutput = chakana.command.output("/sbin/ifconfig")
+    else:
+      self._ifconfigOutput = ifconfigOutput
+
+  def interfaces(self):
+    return map(InterfaceInfo,
+               re.compile("^\\w+", re.M).findall(self._ifconfigOutput))
+  
+class InterfaceInfo:
+  "Parser for ifconfig output for a single interface."
+  def __init__(self, interface = None, ifconfigOutput = None):
+    if interface is None:
+      self._interface = chakana.command.output("/sbin/ifconfig").split()[0]
+    else:
+      self._interface = interface
+    if ifconfigOutput is None:
+      self._ifconfigOutput = chakana.command.output("/sbin/ifconfig " +
+                                            self._interface)
+    else:
+      self._ifconfigOutput = ifconfigOutput
+
+  def name(self):
+    return self._ifconfigOutput.split()[0]
+      
+  def address(self):
+    match = re.search("inet addr:((\d{1,3}\.){3}\d{1,3})",
+                      self._ifconfigOutput)
+    if match:
+      return match.group(1)
+    else:
+      return None
+
+  __str__ = name
+  
+class MemInfo(dict):
+  "Parser for /proc/meminfo"
+  def __init__(self, memInfo = None):
+    if memInfo is None:
+      memInfo = chakana.utils.readFile("/proc/meminfo")
+    for line in memInfo.splitlines():
+      if len(line.split(":")) == 2:
+        key, value = line.split(":")
+        if len(value.strip().split()) <= 2:
+          if len(value.strip().split()) == 2:
+            unit = {"KB" : 1024, "MB" : 1024 * 1024,
+                    "GB" : 1024 * 1024 * 1024 }[value.split()[-1].upper()]
+          else:
+            unit = 1
+          self[key] = long(value.strip().split()[0]) * unit
+  
+class UnameInfo:
+  "Parser for output from uname -a"
+  def __init__(self, unameInfo = None):
+    if unameInfo is None:
+      unameInfo = chakana.command.output("uname -a")
+    self._unameInfo = unameInfo.split()
+
+  def __getitem__(self, i):
+    return self._unameInfo[i]
+
+  def __len__(self):
+    return len(self._unameInfo)
+
+  def __getattr__(self, attr):
+    ret = self[self.indexMap()[attr]]
+    if (attr == "architecture") and \
+       (re.match(r"(.*intel|i[0-9]86)", ret, re.I)):
+      # Work around bogus uname output from e.g. Gentoo
+      return "i386"
+    else:
+      return ret
+
+  def smp(self):
+    return "SMP" in self._unameInfo
+  
+  def indexMap(self):
+    return {
+      "os" : 0,
+      "host" : 1,
+      "version" : 2,
+      "architecture" : -2,
+      }
+
+  def __str__(self):
+    return repr(dict([(attr, getattr(self, attr))
+                      for attr in self.indexMap()]))
+
+  def __repr__(self):
+    return repr(self._unameInfo)
+  
+class X86:
+  class CpuInfo(CpuInfo):
+    def count(self, physical = 0):
+      logical = len(self.find("processor"))
+      if physical:
+        siblings = self.find("siblings")
+        if len(siblings) > 0:
+          return logical / int(siblings[0])
+      return logical
+
+    def type(self, num = 0):
+      return re.match(r"Intel(\(R\))? (.*) processor [\d]+MHz",
+                      self.find("model name")[num]).group(2)
+
+class X86_64(X86):
+  pass
+    
+class Sparc:
+  class CpuInfo(CpuInfo):
+    def count(self):
+      return int(self.find("ncpus active")[0])
+
+    def type(self, num = 0):
+      return " ".join(self.find("cpu")[num].split()[1:3])
+
+  class UnameInfo(UnameInfo):
+    pass
+
+def freeSpace(path):
+  "Return available disk space on device corresponding to path."
+  # If the device name is long, df may split the relevant line, so
+  # count lines and words from end.
+  return long(
+    chakana.command.output("df -k " + path).splitlines()[-1].split()[-3]) * 1024
+
+def macAddresses():
+  "Return list of mac addresses for all network interfaces."
+  return re.findall('..:..:..:..:..:..', os.popen(
+    '/sbin/ifconfig -a | grep HWaddr', 'r').read().lower())
+
+class Process:
+  """Representation of a running process."""
+
+  def __init__(self, pid):
+    self._pid = pid
+
+  def pid(self):
+    return self._pid
+
+  def attribute(self, name):
+    try:
+      lines = chakana.utils.readFile("/proc/" + str(self._pid) +
+                             "/status").splitlines()
+      for line in lines:
+        (key, value) = line.split(":", 1)
+        if key.strip().lower() == name.lower():
+          return value.strip()
+    except EnvironmentError, err:
+      if err.errno == errno.ENOENT:
+        raise chakana.error.errnoError(errno.ESRCH)
+      raise
+
+  def name(self):
+    return self.attribute("name")
+
+  def parent(self):
+    return Process(int(self.attribute("ppid")))
+
+  def children(self):
+    ret = []
+    for proc in self.all():
+      try:
+        if proc.parent().pid() == self.pid():
+          ret.append(proc)
+      except EnvironmentError, err:
+        if err.errno != errno.ESRCH:
+          raise
+    return ret
+
+  def reallyKill(self, graceTime = 1, sigKillTime = 3, debugLevel = Event):
+    """Really kill process after waiting for graceTime.  Send SIGKILL after
+    sigKillTime."""
+    try:
+      debug(debugLevel, "Killing process " + str(self.pid()) +
+            " (" + str(self.name()) + ")")
+      os.kill(self.pid(), 0)
+      time.sleep(graceTime)
+      debug(debugLevel + 1, "kill -TERM " + str(self.pid()))
+      os.kill(self.pid(), signal.SIGTERM)
+      for tick in range(sigKillTime):
+        os.kill(self.pid(), 0)
+      debug(debugLevel + 1, "kill -KILL " + str(self.pid()))
+      os.kill(self.pid(), signal.SIGKILL)
+      time.sleep(graceTime)
+      if self.attribute("state")[0] != "Z":
+        debug(debugLevel, "Process refused to die: " + str(self.pid()) +
+              " (" + self.name() + ")")
+    except EnvironmentError, err:
+      if err.errno != errno.ESRCH:
+        raise
+      debug(debugLevel + 2, "Pid " + str(self.pid()) + " no longer exists")
+  
+  def killAllBelow(self, debugLevel = Event, ** kwArgs):
+    """Kill all processes below (but not including) a process.  Start from
+    bottom of tree."""
+    debug(debugLevel, "Killing all processes below " + str(self.pid()) +
+          " (" + self.name() + ")")
+    children = self.children()
+    debug(debugLevel + 2, "Pid " + str(self.pid()) + " has " +
+          str(len(children)) + " children")
+    for child in children:
+      child.killAllBelow(debugLevel = debugLevel, ** kwArgs)
+      child.reallyKill(debugLevel = debugLevel, ** kwArgs)
+    
+  def all(cls):
+    ret = []
+    for statusFile in glob.glob("/proc/*/status"):
+      try:
+        ret.append(cls(int(os.path.basename(os.path.dirname(statusFile)))))
+      except ValueError:
+        continue
+    return ret
+  all = classmethod(all)
+
+def Host():
+  architecture = chakana.command.output("uname -m").strip()
+  if re.match("i[0-9]86", architecture):
+    return X86
+  elif architecture == "x86_64":
+    return X86_64