title: Send SIGINT in python to os.system
body: <p>I am trying to run a Linux command <code>strace -c ./client</code> in python with <code>os.system()</code>. When I press <kbd>Ctrl</kbd> + <kbd>C</kbd> I get some output on the terminal. I have to send the &quot;Process correctly halted&quot; signal programmatically after one minute and want the terminal output that is produced after pressing <kbd>Ctrl</kbd> + <kbd>C</kbd> in a file.
  A pseudo script will be really helpful. If I use <code>subprocess.Popen</code> and then send <kbd>Ctrl</kbd> + <kbd>C</kbd> signal from keyboard I didn't get output on the terminal,so have to use <code>os.system</code></p>