UserDocs/Distro/RedHat: wifi

#!/bin/bash

BIN=/etc/sysconfig/network-scripts
IFACE=ath0
LOC=home
PROFILE=${IFACE}-${LOC}

. /etc/init.d/functions

if [ $# -lt 1 ] || [ $# -gt 2 ]; then
  echo "usage: wifi <start|ad-hoc|stop|status> [iface]"
  exit 1
fi

if [ $# -eq 2 ]; then
  IFACE=$2
fi

if [ ! -f "$BIN/ifcfg-$PROFILE" ]; then
  echo "wifi: $PROFILE: No such interface"
  exit 1
fi  
  
if [ "$1" = "start" ]; then
  action $"Bringing down eth0:" sudo $BIN/ifdown eth0
  action $"Bringing up $PROFILE:" sudo $BIN/ifup $PROFILE
  exit
fi

if [ "$1" = "ad-hoc" ]; then
  action $"Bringing down eth0:" sudo $BIN/ifdown eth0
  sudo ifconfig ath0 up
  echo iwlist scan reports the following WiFi networks:
  sudo iwlist scan 2>&1 | grep ESS | perl -ane '$_=~s/^\s+ESSID:/  /;print'
  echo -e "WiFi network: \c"
  read essid
  echo -e "WEP key: \c"
  read key
  echo -n $"Bringing up $IFACE:"
  sudo iwconfig $IFACE essid "$essid" > /dev/null 2>&1
  if [ "X$key" != "X" ]; then
    sudo iwconfig $IFACE key "s:$key" > /dev/null 2>&1
  fi
  echo_success; echo
  echo -n $"Bringing up DHCP client: "
  addr=`sudo dhclient 2>&1 | egrep '^bound to'`;
  echo_success; echo
  echo $addr
  exit
fi

if [ "$1" = "stop" ]; then
  action $"Bringing down $PROFILE:" sudo $BIN/ifdown $PROFILE
  action $"Bringing up eth0:"     sudo $BIN/ifup eth0
  exit
fi


if [ "$1" = "status" ]; then
  sudo ifconfig $IFACE
  exit
fi

echo "usage: wifi <start|ad-hoc|stop|status> [iface]"
exit 1