1  """cli-specific implementation of process utilities.
   2  
   3  cli - Common Language Infrastructure for IronPython. Code
   4        can run on any operating system. Check os.name for os-
   5        specific settings.
   6  
   7  This file is only meant to be imported by process.py, not by end-users.
   8  
   9  This file is largely untested. To become a full drop-in process
  10  interface for IronPython will probably require you to help fill
  11  in the details. 
  12  """
  13  
  14  # Import cli libraries:
  15  import clr
  16  import System
  17  
  18  # Import Python libraries:
  19  import os
  20  
  21  # Import IPython libraries:
  22  from ._process_common import arg_split
  23  
  24  
  25  def system(cmd):
  26      """
  27      system(cmd) should work in a cli environment on Mac OSX, Linux,
  28      and Windows
  29      """
  30      psi = System.Diagnostics.ProcessStartInfo(cmd)
  31      psi.RedirectStandardOutput = True
  32      psi.RedirectStandardError = True
  33      psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal
  34      psi.UseShellExecute = False
  35      # Start up process:
  36      reg = System.Diagnostics.Process.Start(psi)
  37  
  38  
  39  def getoutput(cmd):
  40      """
  41      getoutput(cmd) should work in a cli environment on Mac OSX, Linux,
  42      and Windows
  43      """
  44      psi = System.Diagnostics.ProcessStartInfo(cmd)
  45      psi.RedirectStandardOutput = True
  46      psi.RedirectStandardError = True
  47      psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal
  48      psi.UseShellExecute = False
  49      # Start up process:
  50      reg = System.Diagnostics.Process.Start(psi)
  51      myOutput = reg.StandardOutput
  52      output = myOutput.ReadToEnd()
  53      myError = reg.StandardError
  54      error = myError.ReadToEnd()
  55      return output
  56  
  57  
  58  def check_pid(pid):
  59      """
  60      Check if a process with the given PID (pid) exists
  61      """
  62      try:
  63          System.Diagnostics.Process.GetProcessById(pid)
  64          # process with given pid is running
  65          return True
  66      except System.InvalidOperationException:
  67          # process wasn't started by this object (but is running)
  68          return True
  69      except System.ArgumentException:
  70          # process with given pid isn't running
  71          return False
  72