Chapter 16: KCS Client Configuration
276 Console Server & RIM Gateway User Manual
- Here is a more complex script which reads from configuration to display the port label if available and denies access
to the root user:
</etc/config/pmshell-start.sh>
#!/bin/sh
PORT="$1"
USER="$2"
LABEL=$(config -g config.ports.port$PORT.label | cut -f2- -d' ')
if [ "$USER" == "root" ]; then
echo "Permission denied for Super User"
exit 1
fi
if [ -z "$LABEL" ]; then
echo "Welcome $USER, you are connected to Port $PORT"
else
echo "Welcome $USER, you are connected to Port $PORT ($LABEL)"
fi
</etc/config/pmshell-start.sh>
15.3 Raw Access to Serial Ports
15.3.1 Access to serial ports
You can use tip and stty to completely bypass the portmanager and have raw access to the serial ports.
When you run tip on a portmanager controlled port, portmanager closes that port, and stops monitoring it until tip releases
control of it.
With stty, the changes made to the port only "stick" until that port is closed and opened again. So it is doubtful that people
will want to use stty for more than initial debugging of the serial connection.
If you want to use stty to configure the port, you can put stty commands in /etc/config/scripts/portXX.init which gets run
whenever portmanager opens the port.
Otherwise, any setup you do with stty will get lost when the portmanager opens the port. (the reason that portmanager
sets things back to its config rather than using whatever is on the port, is so the port is in a known good state, and will
work, no matter what things are done to the serial port outside of portmanager).
15.3.2 Accessing the console/modem port
The console dial-in is handled by mgetty, with automatic PPP login extensions. mgetty is a smart getty replacement,
designed to be used with Hayes compatible data and data/fax modems. mgetty knows about modem initialization,
manual modem answering (so your modem doesn’t answer if the machine isn’t ready), UUCP locking (so you can use
the same device for dial-in and dial-out). mgetty provides very extensive logging facilities. All standard mgetty options
are supported.
Modem initialization strings:
- To override the standard modem initialization string either use the Management Console (refer Chapter 5) or the
command line config tool (refer Dial-In Configuration Chapter 14).
Enabling Boot Messages on the Console:
- If you are not using a modem on the DB9 console port and instead wish to connect to it directly via a Null Modem
cable you may want to enable verbose mode allowing you to see the standard linux start-up messages. This can be
achieved with the following commands:
# /bin/config --set=config.console.debug=on # /bin/config --run=console # reboot
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