1#!/vendor/bin/sh 2# 3# The script belongs to the feature of UFS FFU via OTA: go/p23-ffu-ota 4# Its purpose is to copy the corresponding firmware into partition for UFS FFU. 5 6ufs_dev="/dev/sys/block/bootdevice" 7fw_dir="/vendor/firmware" 8blk_dev="/dev/block/by-name/fips" 9min_timestamp=$(date -d "2022-10-01" +%s) 10epoch_1y=$(date -u -d "1971-01-01" +%s) 11 12vendor=$(cat ${ufs_dev}/vendor | tr -d "[:space:]") 13model=$(cat ${ufs_dev}/model | tr -d "[:space:]") 14rev=$(cat ${ufs_dev}/rev | tr -d "[:space:]") 15 16file=$(find ${fw_dir} -name "*${vendor}${model}${rev}*" | head -n 1) 17lifec=$(cat ${ufs_dev}/health_descriptor/life_time_estimation_c | tr -d "[:space:]") 18[ ! "$lifec" ] && lifec=0xff 19 20atime=$(ls -lu -d /data 2>&1 | awk '{print $6}') 21timestamp=$(date -d "$atime" +%s) 22(( $timestamp < $min_timestamp )) && timestamp=$min_timestamp 23now=$(date +%s) 24 25if [ -n "$file" ] && (( $lifec < 0x0a )) && (( $timestamp + $epoch_1y >= $now )); then 26 # The first 4KB block at fips partition has been occupied, and unused space begins from 4 KB 27 # Refer to: go/pixel-mp-ffu-ota-1p 28 dd if="$file" of=$blk_dev bs=4k seek=1 29fi 30