fork(1) download 
  1. import time
  2. import threading
  3. import subprocess
  4.  
  5. class Command(object):
  6. 	def __init__(self, cmd, inp_path, out_path):
  7. 		self.cmd = cmd.split(' ')
  8. 		self.process = None
  9. 		self.inp_path = inp_path
  10. 		self.out_path = out_path
  11.  
  12. 	def run(self, timeout):
  13. 		def target():
  14. 			f = open(self.inp_path, 'r')
  15.  
  16. 			out = open(self.out_path,'w')
  17.  
  18. 			self.process = subprocess.Popen(self.cmd,
  19. 						   bufsize = 4096,
  20. 						   shell = False, 
  21. 						   stdin = f, 
  22. 						   stdout = out)
  23. 			self.process.communicate()
  24. 			out.flush()
  25. 		return_code = 0
  26. 		thread = threading.Thread(target = target)
  27. 		thread.start()
  28. 		thread.join(timeout)
  29. 		if thread.isAlive():
  30. 			return_code = 123456
  31. 			try:
  32. 				self.process.terminate()
  33. 	 			thread.join()
  34. 	 		except AttributeError:
  35. 		 		pass
  36. 		else:
  37. 		 	return_code = self.process.returncode
  38. 		return return_code
  39.  
  40. c = Command('./a.out', '/tmp/in.txt', '/tmp/out.txt')
  41. return_code = c.run(timeout = 2) #timelimit.
  42.  
  43. if return_code == 123456:
  44. 	print 'TLE' #Time Limit Exceeded
  45. elif return_code == 0:
  46. 	print 'Program ran successfully' #Either WA/AC
  47. else:
  48. 	print 'RTE' #Run Time Error
Runtime error #stdin #stdout #stderr 0s 92480KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
stderr 
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 801, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "prog.py", line 14, in target
IOError: [Errno 2] No such file or directory: '/tmp/in.txt'

Traceback (most recent call last):
  File "prog.py", line 43, in <module>
  File "prog.py", line 39, in run
AttributeError: 'NoneType' object has no attribute 'returncode'
https://ideone.com/jHoSRD
language:
Python (cpython 2.7.16)
created:
6 years ago
visibility:
public

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