snapshot_dynamic.sh

#!/system/bin/sh

##### md5sum e24d678d9c18c7811e16f4755dfd1e19  /system/sbin/busybox-armv7l

which free >/dev/null 2>&1
if [[ $? -ne 0 ]]
then
  echo "Unable to find 'which' and/or 'free' command, install busybox-armv7l
# mount -o rw,remount /system
# mkdir /system/sbin
# download https://busybox.net/downloads/binaries/latest/busybox-armv7l to /system/sbin
# chmod 777 /system/sbin/busybox-armv7l
# /system/sbin/busybox-armv7l --install -s /system/sbin
# rm -f /system/sbin/ps"
  exit 1
fi

# Not sure if we need this or if it should be "snapshot" or what
#setprop sys.warp.mode true

mount -o ro,remount /

# Starting off by stopping zygote and servicemanager, they like to work against us respawning processes.
stop zygote
stop servicemanager
RESTART="zygote servicemanager"

COUNT=0

while [[ $COUNT -lt 100 ]]
do
  #echo "Closing Services attempt [${COUNT}]"
  process_list=`/system/bin/ps | grep -v "\/sh$" | grep -v "\/sysd$" | grep "\/system" | awk '{print $NF}' | tr '\n' ' ' `
  if [[ "${process_list}" == "" ]]
  then
    echo "All system processes are closed, this is a good thing."
    COUNT=1000
  else
    for process_name in ${process_list}
    do
      #echo "Closing process [${process_name}]"
      service_name=`grep "^service.*${process_name}" /*rc | grep -v goldfish | awk '{print $2}'`
      if [[ "${service_name}" != "" ]]
      then
        echo "Found match for process_name=[${process_name}] service_name=[${service_name}], STOPPING!"
        stop ${service_name}
        RESTART="${RESTART} ${service_name}"
      else
        echo "No match for process_name=[${process_name}], doing killall and hoping it ends"
        killall ${process_name}
      fi
    done
  fi
  COUNT=$(( $COUNT + 1 ))
done

#### Tried stopping modules to prevent kernel panics, does not appear to make a difference so leaving them be
# echo "Stopping Modules"
# module_list=`lsmod | awk '{print $1}' | tr '\n' ' '`
#  for module_name in ${module_list}
#  do
#    echo "removing module [${module_name}]"
#    rmmod ${module_name}
#  done

#### Some helpful info for Debugging
echo "RESTART LIST = [${RESTART}]"
echo "##################################################"
/system/bin/ps
echo "##################################################"
echo "Done stopping pre-services..."

#### sysd stays pegged... so this idea doesn't work.
#echo -n "Waiting for system to calm down."
#grep "^0" /proc/loadavg
#while [ $? -ne 0 ]
#do
#  tail -n1 /proc/loadavg
#  sleep 1
#  sync
#  grep "^0" /proc/loadavg
#done
#echo "Load is acceptable now, Continuing on."

# We just stopped a ton of processes, give the system a moment to settle
sleep 5
sync

### Zero out the memory for a small clean snapshot
head -n2 /proc/meminfo
sync && echo 3 > /proc/sys/vm/drop_caches && echo ""
memfree=$(free -m | awk '/^Mem/ {print $4-32}')
echo "memfree=[${memfree}]"
if [ $memfree -gt 0 ]; then
        dd if=/dev/zero of=/dev/null bs=${memfree}M count=1
fi
head -n2 /proc/meminfo

sleep 5

echo "Stopping sysd, we only have another 15-30 seconds before watchdog reboots us unless we restart sysd in time"
stop sysd
#stop console
sync
sync
sync

#<Before the snapshot retaining Intent>
#   am broadcast -a jp.co.lineo.warp.android.ACTION_WARP_SNAPSHOT_START

#time busybox killall dhcpcd

#### Actually do the snapshot passing on any arguments
/sbin/snapshot $*

echo "snapshot RETURN=[$?]"
#### From here down gets run every boot from the snapshot created.
start sysd
#start console
echo "We're back!"

#### We didn't stop the modules so we don't need to start them
#echo "re-loading modules"
#for module_name in ${module_list}
#do
#  echo "Loading module [${module_name}]"
#  find /system/lib/modules/ -name ${module_name}.ko -exec insmod {} \;
#done

#<Warp Processing immediately after the starting>

STAT=/proc/warp/stat
echo "STAT=[${STAT}]"

#case $STAT in
# 0)
#<Processing at time of snapshot retention >
#  am broadcast -a jp.co.lineo.warp.android.ACTION_WARP_WAKE_UP --es mode 3
#        ;;
# *)
#<Processing at time of loom starting >
#  am broadcast -a jp.co.lineo.warp.android.ACTION_WARP_WAKE_UP --es mode 4
#        ;;
# esac

#/system/bin/logwrapper /system/bin/dhcpcd eth0 &

chmod 777 /extdata
chmod 666 /extdata/MIXTRAX/*
chmod -R 777 /extdata/iGO/ /extdata/synctool/
chown system:system /extdata/DataManager /extdata/DataManager/*


for service in ${RESTART}
do
  echo "Restarting ${service}"
  start ${service}
done