examples/auto-serial-console

   1 #!/bin/sh -e
   2
   3 [ -f /etc/default/autogetty ] && . /etc/default/autogetty
   4
   5 [ 1 -gt $ENABLED ] && exit
   6
   7 for arg in $(cat /proc/cmdline)
   8 do
   9     case $arg in
  10         console=*)
  11             tty=${arg#console=}
  12             tty=${tty#/dev/}
  13
  14             case $tty in
  15                 tty[a-zA-Z]* )
  16                     PORT=${tty%%,*}
  17
  18                     # check for service which do something on this port
  19                     if [ -f /etc/init/$PORT.conf ];then continue;fi
  20
  21                     tmp=${tty##$PORT,}
  22                     SPEED=${tmp%%n*}
  23                     BITS=${tmp##${SPEED}n}
  24
  25                     # 8bit serial is default
  26                     [ -z $BITS ] && BITS=8
  27                     [ 8 -eq $BITS ] && GETTY_ARGS="$GETTY_ARGS -8 "
  28
  29                     [ -z $SPEED ] && SPEED='115200,57600,38400,19200,9600'
  30
  31                     GETTY_ARGS="$AUTOGETTY_ARGS $GETTY_ARGS $SPEED $PORT"
  32                     exec /sbin/getty $GETTY_ARGS
  33             esac
  34     esac
  35 done