update.sh.in.old

#!/bin/sh

set -e
set -x

# ========== kill all non required processes ==========

# First stop some init.d processes

/etc/init.d/bt_ap stop || true
/etc/init.d/wlan_ap stop || true

# /etc/init.d/S99_dhcpd stop || true
# /etc/init.d/S98usb_g_ether stop || true
/etc/init.d/S98_bt_nap stop || true
/etc/init.d/S80dhcp-server stop || true
/etc/init.d/S80dhcp-relay stop || true
/etc/init.d/S60openvpn stop || true
# /etc/init.d/S50sshd stop || true
# /etc/init.d/S40network stop || true
/etc/init.d/S30dbus stop || true
/etc/init.d/S26gdk-pixbuf stop || true
/etc/init.d/S25pango stop || true
/etc/init.d/S21rngd stop || true
/etc/init.d/S20urandom stop || true
# /etc/init.d/S10udev stop || true
# /etc/init.d/S03uim-sysfs.sh stop || true

/etc/init.d/M99_vncserver stop || true
/etc/init.d/M01logging stop || true

# Then kill all processes which are not backed by the kernel image, with a few exceptions

# Loop over all processes
find /proc -type d -name "[0-9]*" -maxdepth 1 | while read -r proc
do 
  # See if the exe link is valid (process is not backed by kernel image)
  if readlink $proc/exe > /dev/null
  then
    exefile=$(readlink -fn $proc/exe)
    pid=$(basename $proc)
    # Check if process is required or can be killed
    case $exefile in
      /bin/busybox) ;;
      /usr/sbin/sshd) ;;
      /usr/libexec/gesftpserver) ;;
      /usr/sbin/dhcpd) ;;
      /sbin/udevd) ;;
      *)
        # kill process
        echo $proc is $exefile kill $pid
        kill -9 $pid
        ;;
    esac
  fi
done

# If these are kept:
#  /bin/busybox) ;;
#  /usr/sbin/sshd) ;;
#  /usr/libexec/gesftpserver) ;;
# The system still runs a while and relogin is possible, but connection is lost after a while
# Keeping in addtion dhcpd and udevd seems to work

# ========== TEST ==========

# remount root fs as read only (to avoid messing it up)
mount -r -o remount /

lsof
# except /dev, anon and pipe files : /tmp/dhcp_leases.list

ls -l /proc/*/exe
# /bin/busybox, /sbin/udevd, /usr/sbin/dhcpd, /usr/sbin/sshd

mkdir /tmp/tmproot
mount none /tmp/tmproot -t tmpfs
mount

mkdir /tmp/tmproot/oldroot
mkdir /tmp/tmproot/proc
mkdir /tmp/tmproot/sys
mkdir /tmp/tmproot/etc
mkdir /tmp/tmproot/bin
mkdir /tmp/tmproot/sbin
mkdir /tmp/tmproot/lib
mkdir -p /tmp/tmproot/usr/sbin

ls -l /tmp/tmproot/
ls -l /

# Copy everything of these:
cp -a /dev /tmp/tmproot/dev

# cp -dp doesn't work because we need to copy the symlink with the original name
find /bin -type f -exec sh -c 'echo FILE {} $(dirname {}); mkdir -p /tmp/tmproot/$(dirname {}) ; cp -p {} /tmp/tmproot{}' \;
find /bin -type l -exec sh -c 'echo LINK {} $(dirname {}); mkdir -p /tmp/tmproot/$(dirname {}) ; ln -s $(readlink -f {}) /tmp/tmproot{}' \;
ls -l /tmp/tmproot/bin

find /sbin -type f -exec sh -c 'echo FILE {} $(dirname {}); mkdir -p /tmp/tmproot/$(dirname {}) ; cp -p {} /tmp/tmproot{}' \;
find /sbin -type l -exec sh -c 'echo LINK {} $(dirname {}); mkdir -p /tmp/tmproot/$(dirname {}) ; ln -s $(readlink -f {}) /tmp/tmproot{}' \;
ls -l /tmp/tmproot/sbin

find /etc -type f -exec sh -c 'echo FILE {} $(dirname {}); mkdir -p /tmp/tmproot/$(dirname {}) ; cp -p {} /tmp/tmproot{}' \;
find /etc -type l -exec sh -c 'echo LINK {} $(dirname {}); mkdir -p /tmp/tmproot/$(dirname {}) ; ln -s $(readlink -f {}) /tmp/tmproot{}' \;
ls -l /tmp/tmproot/etc

find /lib -type f -maxdepth 1 -exec sh -c 'echo FILE {} $(dirname {}); mkdir -p /tmp/tmproot/$(dirname {}) ; cp -p {} /tmp/tmproot{}' \;
find /lib -type l -maxdepth 1 -exec sh -c 'echo LINK {} $(dirname {}); mkdir -p /tmp/tmproot/$(dirname {}) ; ln -s $(readlink -f {}) /tmp/tmproot{}' \;
ls -l /tmp/tmproot/lib

# Copy only very specifc files from these
cp -p /usr/sbin/sshd /tmp/tmproot/usr/sbin
cp -p /usr/sbin/dhcpd /tmp/tmproot/usr/sbin
mkdir -p /tmp/tmproot/usr/share/txt-utils
cp -p /usr/share/txt-utils/power-off /tmp/tmproot/usr/share/txt-utils

find bin -type l -exec sh -c "ln -s -f $(readlink -f {} | sed 's|/tmp/tmproot||') {}" \;

# Switch root
pivot_root /tmp/tmproot/ /tmp/tmproot/oldroot
mount none /proc -t proc
mount none /sys -t sysfs (this may fail on 2.4 systems)
mount none /dev/pts -t devpts


exit 0

# ========== Get TAR payload start ==========

match=$(grep -n -m 1 '^PAYLOAD:$' $0 | cut -d ':' -f 1)
payload_start=$((match + 1))

# ========== Create list of existing files ==========

find /bin  -type f > ListOld.txt
find /etc  -type f >> ListOld.txt
find /lib  -type f >> ListOld.txt
find /opt  -type f >> ListOld.txt
find /root -type f >> ListOld.txt
find /sbin -type f >> ListOld.txt
find /usr  -type f >> ListOld.txt

cat ListOld.txt
chmod 666 ListOld.txt

# ========== Create list of new files ==========

tail -n +$payload_start $0 | tar -C / -tzf - | sed 's|^\./|/|' > ListNew.txt

cat ListNew.txt
chmod 666 ListNew.txt

# ========== Delete existing files which are not in new syste tar ==========

# uniq -u leaves only unique lines, but everything which is only in ListNew or in both is in there 2 or 3 times

sort ListNew.txt ListNew.txt ListOld.txt | uniq -u > ListDelete.txt
chmod 666 ListDelete.txt

cat ListDelete.txt | while read -r file
do
  echo Removing old file $file
  ls -l $file
  # rm -f $file
done

# ========== Extract new files ==========

tail -n +$payload_start $0 | tar -C / -xzvf -

# ========== Firmware Update ==========

/sbin/FwUpdTxt || { echo "Firmware update failed" 1>&2 ; exit 2 ; }

# delete firmware update to save space
rm /sbin/FwUpdTxt

# ========== Bootloader Update ==========

/lib/boot/UpdateBootloader.sh || { echo "Bootloader update failed" 1>&2 ; exit 2 ; }

# delete bootloader to save space
rm /lib/boot/am335x-kno_txt.dtb
rm /lib/boot/MLO
rm /lib/boot/u-boot.img
rm /lib/boot/uImage
rm /lib/boot/UpdateBootloader.sh

# ========== write new system version ========== 

#sync
#echo "4.4.1.0" > /etc/sysversion
#chmod go+r /etc/sysversion
#sync
#sync

# ========== power off delayed in 10 seconds (give motor controller time to reboot) ========== 

#nohup sh -c 'sleep 10 ; echo 1 > /sys/class/leds/off-uc/brightness' > /dev/null &

# ========== return to caller ========== 

exit 0

# ========== data follows below ==========