On Mon, 31 May 1999 16:43:16 -0500 (EST), 
"Alan Curry" <pacman-kernel@cqc.com> wrote:
>  (
>  stty 38400
>
>  chat -f /usr/lib/ppp/chatscript
>  case $? in
>    0) echo "Success" 1>&2
>       /usr/sbin/pppd & ;;
>    4) echo "BUSY" 1>&2 ;;
>    *) echo "call failed" 1>&2 ;;
>  esac
>  ) </dev/modem >/dev/modem

The problem with that script or any method that uses shell redirection
is that the shell tries to open /dev/modem without the O_NONBLOCK flag.
On /dev/cua* it usually works, on /dev/ttyS* it often hangs waiting for
the device to open.  Remember that the shell tries to open redirectoed
files before it runs the script, without shell support for O_NONBLOCK
it is doomed to failure on /dev/ttyS*.


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