Black Box LES1208A-R2, LES1332A, LES1408A Raw Access to Serial Ports, Access to serial ports

-The portmanager will attempt to execute /etc/config/scripts/portXX.alert (where XX is the port number, e.g. 08)

-The script is run with STDIN containing the data which triggered the alert, and STDOUT redirected to /dev/null, NOT to the serial port. If you want to communicate with the port, use pmshell or pmchat from within the script.

-If the script cannot be executed, then the alert will be mailed to the address configured in the system administration section.

When a user connects to any port:

-If a file called /etc/config/pmshell-start.shexists it is run when a user connects to a port. It is provided 2 arguments, the "Port number" and the "Username". Here is a simple example:

</etc/config/pmshell-start.sh > #!/bin/sh

PORT="$1"

USER="$2"

echo "Welcome to port $PORT $USER"

</etc/config/pmshell-start.sh>

-The return value from the script controls whether the user is accepted or not, if 0 is returned (or nothing is done on exit as in the above script) the user is permitted, otherwise the user is denied access.

-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.

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