125 lines
3.6 KiB
Bash
125 lines
3.6 KiB
Bash
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#! /bin/sh
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###################################################################################
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# Choose and enable wifi-interface with uci
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# Usage: choose_wifi.sh [ssid]
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# when argument is passed, script tries to activate wifi interface with that ssid
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# else script tries to activate first match from iwlist scanning results
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#
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# author: Christian Ulrich
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# version: 0.1
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###################################################################################
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# function search_ssid( ssid, number_of_ifaces )
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#################################################
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search_ssid(){
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found=false
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current=0
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index_to_return=0
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while [ $found = false -a $current -lt $2 ]
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do
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uci_result=`uci get wireless.@wifi-iface[$current].ssid 2>&1`
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if [ $uci_result = $1 ]; then
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index_to_return=`expr $current + 1`
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found=true
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fi
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current=`expr $current + 1` #increment counter
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done
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return $index_to_return
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}
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# Count interfaces in /etc/config/wireless (result in $iface_counter)
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# and check if any of them is enabled
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######################################################################
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uci_result="0"
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value_exists=true
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iface_counter=0
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enabled_iface_exists=false
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while [ $value_exists = true ]
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do
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uci_result=`uci get wireless.@wifi-iface[$iface_counter].ssid 2>&1`
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if [ $? -eq 0 ]; then
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#iface_counter=`expr $iface_counter + 1` #increment iface_counter
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#uci_result=`uci get wireless.@wifi-iface[$iface_counter].disabled 2>/dev/null`
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if [ `uci get wireless.@wifi-iface[$iface_counter].disabled 2>/dev/null` = 0 ]; then
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enabled_iface_exists=true
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fi
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iface_counter=`expr $iface_counter + 1` #increment iface_counter
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else
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value_exists=false
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fi
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done
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# Get Wifi interface
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#####################
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#wifi_iface=$(cat /proc/net/wireless | grep : )
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#wifi_iface=$(echo $wifi_iface | cut -c1-$(expr $(expr index "$wifi_iface" :) - 1 ))
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# Check commandline options and start searching
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################################################
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if [ $# -eq 0 ]; then
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if [ $enabled_iface_exists = false ]; then # if no interface is enabled, enable first one
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uci set wireless.@wifi-iface[0].disabled=0
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/etc/init.d/network reload
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sleep 1
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fi
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#scan_result=`iwlist ${wifi_iface} scanning | grep ESSID`
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scan_result=`iwlist scanning 2>/dev/null | grep ESSID`
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if [ $? -eq 1 ]; then
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sleep 1
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scan_result=`iwlist scanning 2>/dev/null | grep ESSID`
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fi
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#echo ${scan_result[1]}
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scan_result=`echo $scan_result | tr -d 'ESSID:"'`
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#scan_result=`echo $scan_result | tr -d '" '`
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index_of_ssid_to_activate=0
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for j in $scan_result
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do
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if [ $index_of_ssid_to_activate -eq 0 ]; then
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search_ssid $j $iface_counter
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index_of_ssid_to_activate=$?
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if [ $index_of_ssid_to_activate -ne 0 ]; then
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#ssid=$j
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break
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fi
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fi
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done
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elif [ $# -eq 1 ]; then
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index_of_ssid_to_activate=0
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search_ssid $1 $iface_counter
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index_of_ssid_to_activate=$?
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else
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echo "usage: choose_wifi.sh [ssid]"
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exit 1
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fi
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# Evaluate results and enable the right interface with uci
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###########################################################
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if [ $index_of_ssid_to_activate -eq 0 ]; then
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echo "Network with SSID ${1} not defined in /etc/config/wireless."
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exit 1
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fi
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i=1
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while [ $i -le $iface_counter ]
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do
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if [ $i -eq $index_of_ssid_to_activate ]; then
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uci set wireless.@wifi-iface[`expr $i - 1`].disabled=0
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ssid=$(uci get wireless.@wifi-iface[`expr $i - 1`].ssid)
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else
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uci set wireless.@wifi-iface[`expr $i - 1`].disabled=1
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fi
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i=`expr $i + 1`
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done
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# Activate interface
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##########################################
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echo "Activating wifi-interface ${ssid}..."
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/etc/init.d/network reload
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