runPrismScan() - /usr/sbin/wag-profiles.sh - puppylinux

# lines 1992 to 2021 of /usr/sbin/wag-profiles.sh
# http://www.pearltrees.com/s243a/runprismscan-puppylinux/id16476573
# Dougal: put this into a function, so we can use it at boot time
# (note that it echoes Xs for the progress bar)
runPrismScan()
{
    INTERFACE="$1"
    # enable interface
    wlanctl-ng "$INTERFACE" lnxreq_ifstate ifstate=enable >/tmp/wlan-up 2>&1
    # scan (first X echoed only afterwards!
    wlanctl-ng "$INTERFACE" dot11req_scan bsstype=any \
     bssid=ff:ff:ff:ff:ff:ff ssid="" scantype=both \
      channellist="00:01:02:03:04:05:06:07:08:09:0a:0b:00:00" \
       minchanneltime=200 maxchanneltime=250 >/tmp/prism-scan-all 2>/dev/null
    echo "X"
    # get number of access points (make sure we get integer)
    POINTNUM=$(grep -F 'numbss=' /tmp/prism-scan-all 2>/dev/null | cut -d= -f2 | grep [0-9])
    rm /tmp/prism-scan-all >/dev/null 2>&1
    ## Dougal: not sure about this -- need a way to make sure we get something
    #if grep -F 'resultcode=success' /tmp/prism-scan-all ; then
    if [ "$POINTNUM" ] ; then
      # get scan results for all access points
      for P in $(seq 0 $POINTNUM)
      do
        wlanctl-ng "$INTERFACE" dot11req_scan_results bssindex=$P >/tmp/prism-scan$P 2>/dev/null
      done
      echo "X"
    else # let us know it failed
      return 1
    fi
    return 0
}