Re: [Haskell-cafe] System.Posix, forked processes and psuedo terminals on Linux

Donn Cave wrote:

My guess is that the default tty attributes include ECHO. So the data you write to the master fd is echoed back, as though by the fork process but actually by the terminal driver. You can turn ECHO off.

Thanks very much Donn, that was an excellent guess. Adding: attr <- getTerminalAttributes fd setTerminalAttributes fd (withoutMode attr EnableEcho) Immediately at the top of the runParent process gave me the results I expected. Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/