tools/netconsole

   1 #!/bin/sh
   2
   3 usage() {
   4         (
   5         echo "Usage: $0 <board IP> [board port]"
   6         echo ""
   7         echo "If port is not specified, '6666' will be used"
   8         [ -z "$*" ] && exit 0
   9         echo ""
  10         echo "ERROR: $*"
  11         exit 1
  12         ) 1>&2
  13         exit $?
  14 }
  15
  16 while [ -n "$1" ] ; do
  17         case $1 in
  18                 -h|--help) usage;;
  19                 --)        break;;
  20                 -*)        usage "Invalid option $1";;
  21                 *)         break;;
  22         esac
  23         shift
  24 done
  25
  26 ip=$1
  27 port=${2:-6666}
  28
  29 if [ -z "${ip}" ] || [ -n "$3" ] ; then
  30         usage "Invalid number of arguments"
  31 fi
  32
  33 for nc in netcat nc ; do
  34         type ${nc} >/dev/null 2>&1 && break
  35 done
  36
  37 trap "stty icanon echo intr ^C" 0 2 3 5 10 13 15
  38 echo "NOTE: the interrupt signal (normally ^C) has been remapped to ^T"
  39
  40 stty -icanon -echo intr ^T
  41 (
  42 if type ncb 2>/dev/null ; then
  43         # see if ncb is in $PATH
  44         exec ncb ${port}
  45
  46 elif [ -x ${0%/*}/ncb ] ; then
  47         # maybe it's in the same dir as the netconsole script
  48         exec ${0%/*}/ncb ${port}
  49
  50 else
  51         # blah, just use regular netcat
  52         while ${nc} -u -l -p ${port} < /dev/null ; do
  53                 :
  54         done
  55 fi
  56 ) &
  57 pid=$!
  58 ${nc} -u ${ip} ${port}
  59 kill ${pid} 2>/dev/null