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   1 #!/bin/sh
   2 # leds
   3 #
   4 # utilities to manipulate the settings of the system leds
   5 #
   6 # load the utility functions unless this script is being called
   7 # just to load its own functions.
   8 case "$1" in
   9 leds)   ;;
  10 *)      . /etc/default/rcS
  11         . /etc/default/functions;;
  12 esac
  13
  14 #
  15 # led_set led-dir off|on|slow|fast|panic|blink|flash|*
  16 #  set the given LED (expressed as a directory) to the
  17 #  given status.
  18 #
  19 led_set(){
  20         local setting
  21         # expect led-dir state
  22         if test -d "$1"
  23         then
  24                 setting="$2"
  25                 case "$setting" in
  26                 off|on)         echo -n none
  27
  28                                 case "$setting" in
  29                                 on)     echo -n 255;;
  30                                 off)    echo -n 0;;
  31                                 esac >"$1/brightness";;
  32
  33                 slow|fast|panic|blink|flash)
  34                                 echo -n timer
  35
  36                                 case "$setting" in
  37                                 flash)  echo -n 60;;
  38                                 blink)  echo -n 540;;
  39                                 slow)   echo -n 500;;
  40                                 fast)   echo -n 1500;;
  41                                 panic)  echo -n 3000;;
  42                                 esac >"$1/delay_on"
  43
  44                                 case "$setting" in
  45                                 flash)  echo -n 540;;
  46                                 blink)  echo -n 60;;
  47                                 slow)   echo -n 500;;
  48                                 fast)   echo -n 1500;;
  49                                 panic)  echo -n 3000;;
  50                                 esac >"$1/delay_off";;
  51
  52                 *)              echo -n "$setting";;
  53                 esac >"$1/trigger"
  54         else
  55                 echo "leds: $1: no such directory" >&2
  56                 return 1
  57         fi
  58 }
  59
  60 #
  61 # sysled [boot] system|user|singleuser|shutdown [error|panic|*]
  62 #  set the system LEDs to indicate the given boot state, the function
  63 #  will temporarily mount sysfs is necessary (using /mnt)
  64 #
  65 # the cases for two LEDs (ready+status)
  66 sysled_readystatus(){
  67         local ready status
  68         # expect dir [boot](system|user) [error|panic]
  69         case "$3" in
  70         error)  ready=fast;     status=off;;
  71         panic)  ready=fast;     status=fast;;
  72         *)      case "$2" in
  73                 bootsystem)     ready=slow;     status=slow;;
  74                 system)         ready=on;       status=on;;
  75                 bootuser)       ready=on;       status=slow;;
  76                 user)           ready=user;     status=off;;
  77                 bootsingleuser) ready=on;       status=slow;;
  78                 singleuser)     ready=user;     status=user;;
  79                 bootshutdown)   ready=on;       status=slow;;
  80                 shutdown)       ready=slow;     status=on;;
  81                 esac;;
  82         esac
  83
  84         led_set "$1/$ready_led_name" "$ready"
  85         led_set "$1/$status_led_name" "$status"
  86 }
  87 #
  88 # the cases for one LED (just ready)
  89 sysled_ready(){
  90         local ready
  91         # expect dir [boot](system|user) [error|panic]
  92         case "$3" in
  93         error)  ready=fast;;
  94         panic)  ready=panic;;
  95         *)      case "$2" in
  96                 bootsystem)     ready=flash;;
  97                 system)         ready=blink;;
  98                 bootuser)       ready=slow;;
  99                 user)           ready=user;;
 100                 bootsingleuser) ready=flash;;
 101                 singleuser)     ready=blink;;
 102                 bootshutdown)   ready=slow;;
 103                 shutdown)       ready=blink;;
 104                 esac;;
 105         esac
 106
 107         led_set "$1/$ready_led_name" "$ready"
 108 }
 109 #
 110 # the cases for one blue flashing LED (just power)
 111 sysled_power(){
 112         local power
 113         # expect dir [boot](system|user) [error|panic]
 114         case "$3" in
 115         error)  power=off;;
 116         panic)  power=off;;
 117         *)      case "$2" in
 118                 bootsystem)     power=off;; # blinking
 119                 system)         power=off;; # blinking
 120                 bootuser)       power=on;;
 121                 user)           power=on;;
 122                 bootsingleuser) power=off;; # blinking
 123                 singleuser)     power=off;; # blinking
 124                 bootshutdown)   power=off;; # blinking
 125                 shutdown)       power=off;; # blinking
 126                 esac;;
 127         esac
 128
 129         led_set "$1/$power_led_name" "$power"
 130 }
 131 #
 132 sysled(){
 133         local mp st boot isst
 134         mp=/sys
 135         st=1
 136         boot=
 137
 138         # validate arguments
 139         if test "$1" = boot
 140         then
 141                 shift
 142                 boot=boot
 143         fi
 144         case "$1" in
 145         system|user|singleuser|shutdown) :;;
 146         *)      echo "sysled: unknown option '$1'" >&2
 147                 echo " usage: sysled [boot] system|user|singleuser|shutdown [error|panic|*]" >&2
 148                 return 1;;
 149         esac
 150
 151         if test ! -d "$mp/class/leds" && mount -t sysfs sysfs /mnt
 152         then
 153                 mp=/mnt
 154         fi
 155         #
 156         # check for the 'ready' LED - otherwise check for a 'power' LED
 157         if test -d "$mp/class/leds/$ready_led_name"
 158         then
 159                 if test -d "$mp/class/leds/$status_led_name"
 160                 then
 161                         sysled_readystatus "$mp/class/leds" $boot"$@"
 162                 else
 163                         sysled_ready "$mp/class/leds" $boot"$@"
 164                 fi
 165         else
 166                 if test -d "$mp/class/leds/$power_led_name"
 167                 then
 168                         sysled_power "$mp/class/leds" $boot"$@"
 169                 fi
 170         fi
 171         #
 172         # clean up
 173         test "$mp" = /mnt && umount /mnt
 174         return "$st"
 175 }
 176
 177 #
 178 # beep {arguments}
 179 #  emit a beep
 180 #  does nothing if there is no beep executable, is very
 181 #  quiet in the presence of errors
 182 beep(){
 183         local arg devices module
 184         arg=
 185         test "$1" = beep && shift
 186         if test -x /bin/beep
 187         then
 188                 devices=`ls -d /sys/class/input/event*`
 189                 for device in $devices
 190                 do
 191                         module=`egrep PHYSDEVDRIVER $device'/uevent' | cut -d '=' -f 2`
 192                         if test "$module" = "ixp4xx-beeper";
 193                         then
 194                                 devnode=`echo "$device" | cut -d '/' -f 5`
 195                                 arg="-e /dev/input/"$devnode
 196                                 break
 197                         fi
 198                 done
 199                 /bin/beep $arg "$@" 2>/dev/null
 200         fi
 201         return 0
 202 }
 203
 204 #
 205 # leds_help
 206 #  be helpful
 207 # leds <led> off|on|slow|fast|panic|blink|flash|user|*
 208 # leds [boot] system|user|singleuser|shutdown [error|panic|*]
 209 leds_help(){
 210         echo "leds: change the setting of the LEDs" >&2
 211         echo " usage:" >&2
 212         echo "  leds [boot] system|user|singleuser|shutdown [error|panic|*]" >&2
 213         echo "    set leds during system boot to indicate a particular boot" >&2
 214         echo "    state.  'boot' means that the system is transitioning to" >&2
 215         echo "    the new state.  'error' or 'panic' means a (potentially)" >&2
 216         echo "    recoverable error or an unrecoverable error ('panic') has" >&2
 217         echo "    occured." >&2
 218         echo "  <led> off|on|slow|fast|panic|blink|flash" >&2
 219         echo "    set the named led to the given display." >&2
 220         echo "  beep {args}" >&2
 221         echo "    if possible cause the machine to emit a beep" >&2
 222 }
 223
 224 # Define the LED names based on kernel version.
 225 version=$(uname -r | cut -c -6)
 226 if [ "$version" \< "2.6.25" ]; then
 227         status_led_name="status"
 228         ready_led_name="ready"
 229         power_led_name="power"
 230 else
 231         case "$(machine)" in
 232         dsmg600)
 233                 status_led_name="none"
 234                 ready_led_name="none"
 235                 power_led_name="dsmg600:green:power"
 236                 ;;
 237         fsg3)
 238                 status_led_name="none"
 239                 ready_led_name="fsg:blue:sync"
 240                 power_led_name="none"
 241                 ;;
 242         nas100d)
 243                 status_led_name="none"
 244                 ready_led_name="none"
 245                 power_led_name="nas100d:blue:power"
 246                 ;;
 247         nslu2)
 248                 status_led_name="nslu2:red:status"
 249                 ready_led_name="nslu2:green:ready"
 250                 power_led_name="none"
 251                 ;;
 252         esac
 253 fi
 254
 255 # the real command, if required
 256 case "$1" in
 257 boot|system|user|singleuser|shutdown)
 258         sysled "$@";;
 259
 260 beep)   beep "$@";;
 261
 262 ""|-*)  leds_help;;
 263 help)   leds_help;;
 264
 265 leds)   # just load the functions
 266         ;;
 267
 268 *)      led_set /sys/class/leds/"$@"
 269 esac