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

[Sandeep Gupta]

I am executing a command from python via os.popen().  While the
command is executing, if I type ctrl-c, the command receives the
interrupt.  I would like to block the ctrl-c from the command and I've
tried the following:

1)Using python's signal module to ignore SIGINT.  This causes python
to ignore SIGINT, but a ctrl-c that is typed during the popen() call
still goes to the command.

2)Adding "< /dev/null" to the os.popen() call.  This doesn't help.

3)Using popen2() and immediately closing the stdin file.  This also
doesn't work.

Any suggestions would be greatly appreciated!

Thanks
Sandeep