[sudo-workers] [Patch] Ability to communicate to a frontend

[Hongli Lai]

Todd C. Miller wrote:
> It seems to me that you don't really need any extra file descriptors,
> just a simple protocol run over fds 0 and 1.

I've thought about this. What if you want to run the child process in 
the same console as the parent process? Using fd 0 and 1 makes that 
impossible, unless you keep the parent process in memory and manually 
redirect all output to the console. But that'll still cause problems for 
apps that do special things with the console (such as ncurses apps). 
You'll end up having to write an entire terminal emulator, which is 
exactly what I want to avoid.