Blocking ctrl-c to os.popen() or os.system()

Jarkko Torppa torppa at staff.megabaud.fi
Sun Jan 5 05:54:10 CET 2003


In article <qwOR9.108503$6H6.3599736 at twister.austin.rr.com>, Sandeep Gupta wrote:
> I am running on Linux, but the script I'm writing will also be using on
> Win2k.
> 
> What I meant was I start the command and programatically wait for it to
> finish.  I wait for the command to finish by doing an f.read() on the stdout
> returned from popen*().  While I am waiting for it to finish, if the user
> types ctrl-c, the command receives the interrupt.
> 
> But if my command is "cvs diff", cvs receives the ctrl-c.
> 
> Any other suggestions?

If your cvs is doing remote stuff it's most propably ssh/rsh that is
trying to grab terminal directly, ssh has some flags that
might help.

This might also help, unless it also enables tty signal processing

import termios,TERMIOS,copy,sys
oat=termios.tcgetattr(sys.stdin.fileno())
at=termios.tcgetattr(sys.stdin.fileno())
at[3]=at[3] & ~TERMIOS.ISIG
termios.tcsetattr(sys.stdin.fileno(),TERMIOS.TCSANOW,at)
(popen here)
termios.tcsetattr(sys.stdin.fileno(),TERMIOS.TCSANOW,oat)

This most propably does not work on windows

-- 
Jarkko Torppa




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