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Configuring custom serial console login banners and scripts Firmware post V2.2.1 supports scriptable console login banners. If a file called /etc/config/pmshell-start.sh exists it is run when a user connects to a port. It is provided two 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;> |
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