how to send a "Ctrl+Break" to a subprocess via pid or handler

Question

import subprocess

proc = subprocess.Popen(['c:\windows\system32\ping.exe','127.0.0.1', '-t'],stdout=subprocess.PIPE) 
while True: 
  line = proc.stdout.readline() 
  print "ping result:", line.rstrip() 
  #sendkey("Ctrl+Break", proc)            # i need this here, this is not for terminate the process but to print a statistics result for the ping result.

If someone know how to do it, please share with me, thanks!

creationflags=subprocess.CREATE_NEW_PROCESS_GROUP should be added when invoke subprocess. — user478514, Aug 25 '11 at 14:07

score 2 · Answer 1 · answered Aug 25 '11 at 07:38

2

The Ctrl+Break keys is a SIGBREAK signal.

Under linux, you can send this signal with kill command, on Windows, this is slightly different. You can use the SendSignal tool.

answered Aug 25 '11 at 07:38

Cédric Julien

74,806
15
120
127

score 2 · Accepted Answer · answered Aug 25 '11 at 07:43

2

Windows? Try this:

import signal
proc.send_signal(signal.SIGBREAK)

If you meant a signal interrupt (kill -2)

import signal
proc.send_signal(signal.SIGINT)

answered Aug 25 '11 at 07:43

wim

302,178
90
548
690

Great, I didn't notice the send_signal on Popen object ;) – Cédric Julien Aug 25 '11 at 08:26
thanks, i also found os.kill(proc.pid, signal.CTRL_BREAK_EVENT) works as well in windows – user478514 Aug 25 '11 at 14:08

how to send a "Ctrl+Break" to a subprocess via pid or handler

2 Answers2

Linked