Function getProcessResults

tests/pexpectTest.py:26–60

executes 'cmd' as a child process and returns the child's output, the duration of execution, and the process exit status. Aborts if child process does not generate output for 'timeLimit' seconds.

(cmd, timeLimit=20)

import sys

def getProcessResults(cmd, timeLimit=20):
  '''
  executes 'cmd' as a child process and returns the child's output,
  the duration of execution, and the process exit status. Aborts if
  child process does not generate output for 'timeLimit' seconds.
  '''
  output = ""
  startTime = time.time()
  child = pexpect.spawn(cmd, timeout=10)
  child.logfile = sys.stdout

  while 1:
    try:
      # read_nonblocking will add to 'outout' one byte at a time
      # newlines can show up as '\r\n' so we kill any '\r's which
      # will mess up the formatting for the viewer
      output += child.read_nonblocking(timeout=timeLimit).replace("\r","")
    except pexpect.EOF as e:
      print(str(e))
      # process terminated normally
      break
    except pexpect.TIMEOUT as e:
      print(str(e))
      output += "\nProcess aborted by FlashTest after %s seconds.\n" % timeLimit
      print(child.isalive())
      child.kill(9)
      break

  endTime = time.time()
  child.close(force=True)

  duration = endTime - startTime
  exitStatus = child.exitstatus

  return (output, duration, exitStatus)

cmd = "./ticker.py"