To auto-shutdown and auto-startup a computer which only serves as a TvHeadend-server, the next script might be of some help.
What the script does for you is testing your system to shut off unless:
* the system is running less than a given minimum time frame
* you are watching TV
* a recording is taking place
* you are watching a recording
* within a short time a new recording will start
* you are logged in on the system
* a post recording or any other process you specified is active
What the script also does for you, is switching your system on short before a new recording should start (default 3 minutes).
Example: program will start at 10:00, start ahead TvHeadend 5 mins, so wakeup is at 9:52 and recording can start at 9:55.
Some hints:
* Be sure RTC is set (and stays set) to UTC-time.
* Also be sure that the user who calls the script has rights to execute (see the wiki about “HowTo wakeup XBMC/TVHeadend for scheduled recording”).
* Run the script with "sudo"-rights on boot. It will remain active until shutdown.
* Install and use Webmin to manage your system and to program the script to run on boot the easy way.
(Start webmin session > system > bootup and shutdown > create a new upstart service.)
* Install all necessary packages like rtcwake.
#!/bin/bash
export LANG=C # SET LANGUAGE
# TEST 1 = NETWORK TRAFFIC MORE THAN MINIMUM (WHILE WATCHING A RECORDING FOR EXAMPLE) > STAY AWAKE
# TEST 2 = SERVER UP LESS THAN MINIMUM TIME SINCE BOOT > STAY AWAKE
# TEST 3 = ACTIVE USERS > STAY AWAKE
# TEST 4 = ACTIVE USER PROCESSES NOT TO BE INTERRUPTED > STAY AWAKE
# TEST 5 = WATCHING TV, RECORDING OR NEXT WAKE UP WITHIN SAFE MARGIN FROM NEXT EVENT > STAY AWAKE
# VARIABLES TO SET
INTERVAL=60 # SECONDS TO WAIT FOR NEXT TESTRUN CHECKING FOR SHUTDOWN
NRtests=30 # MINIMUM NUMBER OF TESTRUNS TO STAY AWAKE AFTER BOOT OR AFTER NETWORK TRAFFIC IDLE
NWinterface="eth0" # NETWORK INTERFACE TO MONITOR FOR TRAFFIC
INidle=100 && OUTidle=100 # MAXIMUM NETWORK TRAFFIC IN AND OUT CONSIDERED IDLE (IN KILOBITS)
PROCcheck=(ffmpeg avconv) # PROCESSES TO BE CHECKED FOR ACTIVITY
MARGINshutdown=10 # MINIMUM MINUTES FOR CONSECUTIVE SHUTDOWN AND STARTUP
MARGINstartup=3 # MINIMUM MINUTES TO START UP PROPERLY
EPGhours=24 # MAXIMUM HOURS NOT TO WAKE UP FOR UPDATING EPG
TVHnm="USER" && TVHpwd="PASSWORD" # TVHEADEND LOGIN USER NAME AND PASSWORD
NETarray=( $(grep "$NWinterface" /proc/net/dev | awk '{print $2"="$10}') ) # GET NETWORK STATE AND START ARRAY
testIN=$((NRtests*INTERVAL*1000*INidle/8)) && testOUT=$((NRtests*INTERVAL*1000*OUTidle/8)) # CALCULATE NETWORK TRAFFIC IN AND OUT TEST VALUES
while true; do # INFINITE LOOP TESTING FOR SHUTDOWN
sleep $INTERVAL # WAIT TO START NEXT CHECK
NETarray[${#NETarray[*]}]=$(grep "$NWinterface" /proc/net/dev | awk '{print $2"="$10}') # GET NETWORK STATE AND ADD TO ARRAY
offset=$((${#NETarray[*]}-NRtests-1)) && NETarray=( ${NETarray[*]:${offset/-*/0}} ) # CLIP ARRAY ACCORDING TO TEST TIME FRAME; MIN ACCEPTABLE OFFSET ZERO
if [ $((${NETarray[-1]/=*/}-${NETarray[0]/=*/})) -gt $testIN ]; then continue; fi # TEST 1a NETWORK TRAFFIC IN BELOW MINIMUM
if [ $((${NETarray[-1]/*=/}-${NETarray[0]/*=/})) -gt $testOUT ]; then continue; fi # TEST 1b NETWORK TRAFFIC OUT BELOW MINIMUM
if [ ${#NETarray[*]} -le $NRtests ]; then continue; fi # TEST 2 SERVER UP LESS THAN MINIMUM TIME SINCE BOOT
if [[ "$(who)" != "" ]]; then continue; fi # TEST 3 FOR ACTIVE USERS
for i in ${PROCcheck[*]}; do # LOOP TESTING FOR ACTIVE PROCESSES
if [[ "$(ps -C $i --no-headers)" != "" ]]; then continue 2; fi # TEST 4 FOR ACTIVE PROCESSES AS SPECIFIED
done
WAKEminutes=$((EPGhours*60)) # SET DEFAULT WAKE TIME
if [[ "$(ps -C tvheadend --no-headers)" != "" ]]; then # CHECK TVHEADEND ACTIVE
wget --auth-no-challenge --no-check-certificate --http-user=$TVHnm --http-password=$TVHpwd -O - http://127.0.0.1:9981/status.xml > /dev/shm/statusTVH.txt # GET STATUS
subTVH=$(grep "subscriptions" /dev/shm/statusTVH.txt | awk -F '>' '{print $2}' | awk -F '<' '{print $1}') # GET ACTIVITY STATUS
WAKEminutes=$((WAKEminutes*(1-subTVH))) # SET WAKE TIME TO ZERO WHILE SUBSCRIPTIONS ACTIVE
nextTVH=$(grep "next" /dev/shm/statusTVH.txt | awk -F '>' '{print $2}' | awk -F '<' '{print $1}') # GET MINUTES TO NEXT PLANNED RECORDING
if [ $WAKEminutes -gt ${nextTVH:-"$WAKEminutes"} ]; then WAKEminutes=$nextTVH; fi # SET WAKE TIME TO CLOSEST EVENT
fi
if [ $MARGINshutdown -gt $WAKEminutes ]; then continue; fi # TEST 5 WAKE TIME WITHIN SAFE MARGIN SHUTDOWN
break # IF ALL TESTS FAIL FINISH THE LOOP FOR SHUTDOWN
done
sudo rtcwake -t $(($(date +%s)+(WAKEminutes-MARGINstartup)*60)) -m no # CALCULATE AND SET NEXT RTC WAKE UP
sudo shutdown -P now # SHUTDOWN
