vdr-devel/vdr-shutdown.sh

   1 #!/bin/bash
   2
   3 # Shut the computer down, setting ACPI wakeup time if VDR passes a timer
   4 # event.
   5 #
   6 # Arguments passed by VDR
   7 # $1 = Time (UTC, seconds from epoch) of the next timer event ('0' if none)
   8 # $2 = Number of seconds until the next timer event ('0' if none)
   9 # $3 = Number of the channel that will be recorded
  10 # $4 = File name of the recording as defined in the timer
  11 # $5 = '0' for automatic shutdown or '1' for requested shutdown
  12 #
  13 # 1. To enable this script, pass it to vdr with the -s option.  If using
  14 #    runvdr-extreme then it can be defined in /etc/runvdr.conf:
  15 #      # Call SHUTDOWN to shutdown the computer.
  16 #      SHUTDOWN="/usr/bin/vdr-shutdown.sh"
  17 # 2. If HARDWARECLOCK and TIMEZONE are not set properly in /etc/rc.conf
  18 #    then ACPI wakeup may not work as expected.
  19 # 3. If vdr is being run as a user other than root, e.g. vdr, then this
  20 #    script will not work unless the vdr user is able to run it as root
  21 #    with sudo, without entering a password and without access to a terminal
  22 #    device.  To set all that up in /etc/sudoers, run visudo and enter:
  23 #      Defaults:vdr    !requiretty
  24 #      vdr             ALL=(root) NOPASSWD: /usr/bin/vdr-shutdown.sh
  25
  26 # If not run as root then run as sudo root
  27 if [ "$(id -u)" -ne 0 ]; then
  28   sudo $0 $*
  29   exit $?
  30 fi
  31
  32 # Time for the system to start, in seconds
  33 START_BUFFER="300"
  34
  35 # Add debug information to system logs, set to any value to enable logging
  36 DEBUG_LOGGING=
  37
  38 # Set ACPI wakeup time for timer event
  39 if [ "${1:-0}" -gt 0 ] ; then
  40   BASENAME=$(basename $0)
  41
  42   ADJTIME_FILE="/var/lib/hwclock/adjtime"
  43   if [ ! -e "$ADJTIME_FILE" ]; then
  44     if [ -n "$DEBUG_LOGGING" ]; then
  45       logger -t $BASENAME File $ADJTIME_FILE not found
  46     fi
  47     exit 1
  48   fi
  49
  50   WAKEALARM_FILE="/sys/class/rtc/rtc0/wakealarm"
  51   if [ ! -e "$WAKEALARM_FILE" ]; then
  52     if [ -n "$DEBUG_LOGGING" ]; then
  53       logger -t $BASENAME File $WAKEALARM_FILE not found
  54     fi
  55     exit 1
  56   fi
  57   if [ ! -w "$WAKEALARM_FILE" ]; then
  58     if [ -n "$DEBUG_LOGGING" ]; then
  59       logger -t $BASENAME File $WAKEALARM_FILE not writeable
  60     fi
  61     exit 1
  62   fi
  63
  64   TIMEZONE=$(grep -e LOCAL -e UTC $ADJTIME_FILE)
  65   if [ "$TIMEZONE" = "LOCAL" ]; then
  66     UTC_OFFSET=$(($(date "+%::z" | sed -e "s/[+-]/&1*(((/" -e "s/:/)*60+/g" -e "s/$/)/")))
  67   else
  68     UTC_OFFSET="0"
  69   fi
  70   WAKEUP_TIME=$(($1 + $UTC_OFFSET - $START_BUFFER))
  71   echo 0 > $WAKEALARM_FILE
  72   echo $WAKEUP_TIME > $WAKEALARM_FILE
  73
  74   if [ -n "$DEBUG_LOGGING" ]; then
  75     logger -t $BASENAME ACPI wakeup: $(grep alrm_date /proc/driver/rtc | cut -c 13-) $(grep alrm_time /proc/driver/rtc | cut -c 13-) $TIMEZONE
  76     if [ "$TIMEZONE" = "LOCAL" ]; then
  77       logger -t $BASENAME Timer event: $(date -d "1970-01-01 UTC $1 seconds" "+%F %T %Z")
  78     else
  79       logger -t $BASENAME Timer event: $(date -u -d "1970-01-01 UTC $1 seconds" "+%F %T %Z")
  80     fi
  81   fi
  82 fi
  83
  84 # Shut the computer down
  85 exec poweroff
  86