src/Tools/WWW_Find/lib/Tools/wwwfind

add explicit platform check to wwwfind tool
explicit platform check to avoid calling external programs with strange parameters

#!/usr/bin/env bash
#
# Author: Timothy Bourke, NICTA
#         Based on scripts by Makarius Wenzel, TU Muenchen
#
# DESCRIPTION: run find theorems web server
 
PRG=$(basename "$0")

function usage()
{
  echo
  echo "Usage: $ISABELLE_TOOL $PRG [Command] [Options] [HEAP]"
  echo
  echo "  Command must be one of:"
  echo "    start        start lighttpd and isabelle"
  echo "    stop         stop lighttpd and isabelle"
  echo "    status       show www and scgi port statuses"
  echo
  echo "  Options are:"
  echo "    -l           make log file"
  echo "    -c           specify lighttpd config file"
  echo "                 (default: $WWWCONFIG)"
  echo
  echo "  Provide a web interface to find_theorems against the given HEAP"
  echo
  exit 1
}

function fail()
{
  echo "$1" >&2
  exit 2
}

function checkplatform()
{
  PLAT=$(uname -s)
  case "$PLAT" in
    Linux)
      ;;
    *)
      fail "Platform $PLAT currently not supported by $PRG component."
      ;;
  esac
}

function kill_by_port () {
  IPADDR='[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*'
  PID=$(netstat -nltp 2>/dev/null \
        | sed -ne "s#^.*${IPADDR}:$1 *${IPADDR}:.*LISTEN *\([0-9]*\)/.*#\1#p")
  if [ "$PID" != "" ]; then
    kill -9 $PID
  fi
}

function show_socket_status () {
  netstat -latp 2>/dev/null | grep ":$1 "
}

## platform support check

checkplatform

## process command line

case "$1" in
  start|stop|status)
    COMMAND="$1"
    ;;
  *)
    usage
    ;;
esac

shift

# options

NO_OPTS=true
LOGFILE=false

while getopts "lc:" OPT
do
  NO_OPTS=""
  case "$OPT" in
    l)
      LOGFILE=true
      ;;
    c)
      USER_CONFIG="$OPTARG"
      ;;
    \?)
      usage
      ;;
  esac
done

shift $(($OPTIND - 1))

# args

INPUT=""

if [ "$#" -ge 1 ]; then
  INPUT="$1"
  shift
fi

[ -z "$INPUT" ] && INPUT="$ISABELLE_LOGIC"

[ -x "$LIGHTTPD" ] || fail "lighttpd not found at $LIGHTTPD"

if [ -n "$USER_CONFIG" ]; then
  WWWCONFIG="$USER_CONFIG"
else
  TMP=$(mktemp "/tmp/lighttpd.conf.$$.XXX")
  echo "server.document-root = \"$WWWFINDDIR/www\"" > "$TMP"
  cat "$WWWCONFIG" >> "$TMP"
  WWWCONFIG="$TMP"
fi


## main

WWWPORT=`sed -e 's/[ 	]*//g' -ne 's/server.port=\([0-9][0-9]*\),\?/\1/p' "$WWWCONFIG"`
SCGIPORT=`sed -e 's/[ 	]*//g' -ne 's/"port"=>\([0-9][0-9]*\),\?/\1/p' "$WWWCONFIG"`
MLSTARTSERVER="ScgiServer.server' 10 \"/\" $SCGIPORT;"

case "$COMMAND" in
  start)
    "$LIGHTTPD" -f "$WWWCONFIG"
    if [ "$LOGFILE" = true ]; then
      (cd "$WWWFINDDIR"; \
       nohup "$ISABELLE_PROCESS" -r -u -e "$MLSTARTSERVER" "$INPUT") &
    else
      (cd "$WWWFINDDIR"; \
       nohup "$ISABELLE_PROCESS" -r -u -e "$MLSTARTSERVER" \
         "$INPUT" > /dev/null 2> /dev/null) &
    fi
    ;;
  stop)
    kill_by_port $SCGIPORT
    kill_by_port $WWWPORT
    ;;
  status)
    show_socket_status $WWWPORT
    show_socket_status $SCGIPORT
    ;;
esac