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Text File  |  2012-05-20  |  2.9 KB  |  92 lines
  1. #! /bin/sh
  2. # 
  3. # Laptop mode tools module, called from /usr/sbin/laptop_mode.
  4. # Configuration in /etc/laptop-mode/conf.d/wireless-power.conf.
  5. #
  6. # PURPOSE: power saving for generic wireless adapters that support
  7. #          the iwconfig power command.
  8. #
  9.  
  10. [ "$WIRELESS_POWER_SAVING_EXCLUDE_DRIVERS" ] || WIRELESS_POWER_SAVING_EXCLUDE_DRIVERS="iwl3945 iwl4965 iwlagn ipw3945 ipw2200 ipw2100"
  11.  
  12. #
  13. # Find all the wireless devices that do not use an excluded driver.
  14. # Place the interface names on the list WIFI_IFNAMES.
  15. #
  16. findWifiIfs () {
  17.     local SYSDEVICE EXCLUDED LINK_TARGET DRIVER IFNAME EXCLUDED_DRIVER;
  18.     
  19.     for SYSDEVICE in /sys/class/net/*; do
  20.         IFNAME=`basename $SYSDEVICE`
  21.  
  22.                 # Check if it is a wireless device
  23.         #
  24.         # Inverting return values, we get "0" for wireless device, 
  25.         # and "1" for non-wireless device.
  26.         ($IWCONFIG $IFNAME 2>&1 | grep -q "no wireless extensions.") && ret=1 || ret=0
  27.                 if [ "$ret" = "0" ]; then
  28.             # Yes, it is a wireless device.
  29.             if [ -h $SYSDEVICE/device/driver ]; then
  30.                 # Read the driver name
  31.                 LINK_TARGET=`readlink $SYSDEVICE/device/driver`
  32.                 DRIVER=${LINK_TARGET##*/}
  33.                 
  34.                 EXCLUDED=0
  35.                 for EXCLUDED_DRIVER in $WIRELESS_POWER_SAVING_EXCLUDE_DRIVERS ; do
  36.                     if [ "$EXCLUDED_DRIVER" = "$DRIVER" ] ; then
  37.                         log "VERBOSE" "Wireless interface $IFNAME excluded for wireless-power by driver name."
  38.                         EXCLUDED=1
  39.                     fi 
  40.                 done
  41.                 if [ $EXCLUDED = 0 ] ; then
  42.                     # add the interface name to the list
  43.                     WIFI_IFNAMES="$WIFI_IFNAMES $IFNAME"
  44.                 fi
  45.             fi
  46.  
  47.                 fi
  48.     done
  49. }
  50.  
  51. if [ x$CONTROL_WIRELESS_POWER_SAVING = x1 ] || [ x$ENABLE_AUTO_MODULES = x1 -a x$CONTROL_WIRELESS_POWER_SAVING = xauto ]; then
  52.     log "VERBOSE" "Setting power saving for generic wireless interfaces."
  53.  
  54.     # Provide defaults for config file settings
  55.     [ "$WIRELESS_AC_POWER_SAVING" ]   || WIRELESS_AC_POWER_SAVING=0
  56.     [ "$WIRELESS_BATT_POWER_SAVING" ] || WIRELESS_BATT_POWER_SAVING=1
  57.  
  58.     # Find executables
  59.     if [ -x /sbin/iwconfig ] ; then
  60.         IWCONFIG=/sbin/iwconfig
  61.     elif [ -x /usr/sbin/iwconfig ] ; then
  62.         IWCONFIG=/usr/sbin/iwconfig
  63.     else
  64.         log "VERBOSE" "iwconfig is not installed"
  65.     fi
  66.  
  67.     # Translate 1 => on, 0 => off
  68.     WIRELESS_AC_POWER_SAVING_ONOFF=off
  69.     WIRELESS_BATT_POWER_SAVING_ONOFF=off
  70.     [ "$WIRELESS_AC_POWER_SAVING" = 1 ] && WIRELESS_AC_POWER_SAVING_ONOFF=on
  71.     [ "$WIRELESS_BATT_POWER_SAVING" = 1 ] && WIRELESS_BATT_POWER_SAVING_ONOFF=on
  72.  
  73.     WIFI_IFNAMES=""
  74.     findWifiIfs
  75.     for IF in $WIFI_IFNAMES ; do
  76.         if [ $ON_AC -eq 1 ] ; then
  77.             log "VERBOSE" "On AC power: setting power saving mode for $IF to $WIRELESS_AC_POWER_SAVING_ONOFF."
  78.             if ( ! $IWCONFIG $IF power $WIRELESS_AC_POWER_SAVING_ONOFF ) ; then
  79.                 log "ERR" "Failed."
  80.             fi
  81.         else
  82.             log "VERBOSE" "On battery: setting power saving mode for $IF to $WIRELESS_BATT_POWER_SAVING_ONOFF."
  83.             if ( ! $IWCONFIG $IF power $WIRELESS_BATT_POWER_SAVING_ONOFF ) ; then
  84.                 log "ERR" "Failed."
  85.             fi
  86.         fi
  87.     done
  88. else
  89.     log "VERBOSE" "Generic wireless interface power saving module is disabled."
  90. fi
  91.  
  92.