freebsd stable - Jul 2013 - script(1), cfmakeraw() and Ctrl-Z

Hi!

I've noted that commands like "script -qa /tmp/log sleep 100"
cannot be suspended with Ctrl-Z keys. The reason is call to cfmakeraw()
in script.c - if I comment it out, Ctrl-Z starts to work as expected.

portupgrade uses script(1) so build/install process cannot be suspended too.
(I'm building libreoffice-4.04 now)

The function cfmakeraw() is used since CVS revision 1.1 when script
was imported with other "BSD 4.4 Lite Usr.bin Sources".

Is cfmakeraw() really needed?

Eugene Grosbein

On Mon, Jul 15, 2013 at 12:14:19AM +0700, Eugene Grosbein
wrote:
> I've noted that commands like "script -qa /tmp/log sleep 100"
> cannot be suspended with Ctrl-Z keys. The reason is call to cfmakeraw()
> in script.c - if I comment it out, Ctrl-Z starts to work as expected.
> portupgrade uses script(1) so build/install process cannot be suspended
too.
> (I'm building libreoffice-4.04 now)
> The function cfmakeraw() is used since CVS revision 1.1 when script
> was imported with other "BSD 4.4 Lite Usr.bin Sources".
> Is cfmakeraw() really needed?
The cfmakeraw() call ensures that the processes running within script
get all control characters. For example, you can suspend a job in the
inner shell using Ctrl+Z. This indeed makes it impossible to suspend
script itself.

-- 
Jilles Tjoelker