examples/auto-serial-console


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#!/bin/sh -e

[ -f /etc/default/autogetty ] && . /etc/default/autogetty

[ 1 -gt $ENABLED ] && exit

for arg in $(cat /proc/cmdline)
do
    case $arg in
        console=*)
            tty=${arg#console=}
            tty=${tty#/dev/}

            case $tty in
                tty[a-zA-Z]* )
                    PORT=${tty%%,*}

                    # check for service which do something on this port
                    if [ -f /etc/init/$PORT.conf ];then continue;fi 

                    tmp=${tty##$PORT,}
                    SPEED=${tmp%%n*}
                    BITS=${tmp##${SPEED}n}

                    # 8bit serial is default
                    [ -z $BITS ] && BITS=8
                    [ 8 -eq $BITS ] && GETTY_ARGS="$GETTY_ARGS -8 "

                    [ -z $SPEED ] && SPEED='115200,57600,38400,19200,9600'

                    GETTY_ARGS="$AUTOGETTY_ARGS $GETTY_ARGS $SPEED $PORT"
                    exec /sbin/getty $GETTY_ARGS
            esac
    esac
done