SuperSU 2.67 --backup

C:\ADB\ADB_M8>adb push C:\ADB\ADB_M8\MM3\tst_boot.img /tmp
3705 KB/s (12118016 bytes in 3.193s)

C:\ADB\ADB_M8>adb shell
~ # /su/bin/sukernel --backup /tmp/tst_boot.img
/su/bin/sukernel --backup /tmp/tst_boot.img
sukernel v2.67 (ndk:armeabi-v7a) - Copyright (C) 2014-2016 - Chainfire

[/tmp/tst_boot.img](12118016) --> [/data/stock_boot_22acb886172c5eb575bfd7c9ee070fc2f2cc8bf7.img.gz](8629168)


~ # dd if=/tmp/tst_boot.img of=/dev/block/mmcblk0p42
dd if=/tmp/tst_boot.img of=/dev/block/mmcblk0p42
23668+0 records in
23668+0 records out
12118016 bytes (11.6MB) copied, 0.398213 seconds, 29.0MB/s


~ # /su/bin/sukernel --backup /dev/block/mmcblk0p42
/su/bin/sukernel --backup /dev/block/mmcblk0p42
sukernel v2.67 (ndk:armeabi-v7a) - Copyright (C) 2014-2016 - Chainfire

[/dev/block/mmcblk0p42](12058624) --> [/data/stock_boot_18effe115987f74d93b0657b3da93c2e4e95a7f6.img.gz](8616560)


~ # sha1sum /dev/block/mmcblk0p42
sha1sum /dev/block/mmcblk0p42
22acb886172c5eb575bfd7c9ee070fc2f2cc8bf7  /dev/block/mmcblk0p42