bak_

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#!/bin/sh echo 'image_recovery.sh' SUCCESS=0 FAILURE=1 ERROR=2 RETURNDATA=$SUCCESS FSBL_DEV=/dev/mtd0 UBOOT_DEV=/dev/mtd1 UBOOT_BAK_DEV=/dev/mtd2 FSBL_SW_WP=/sys/class/mtd/mtd0/software_wp UBOOT_SW_WP=/sys/class/mtd/mtd1/software_wp UBOOT_BAK_SW_WP=/sys/class/mtd/mtd2/software_wp # check first run if [ ! -f /mnt/update/image_checked ]; then data=`dd if=$FSBL_DEV bs=8 count=1 status=none |xxd -p` if [ $data != "ffffffffffffffff" ]; then echo "Backup fsbl and uboot image" [ -f $UBOOT_BAK_SW_WP ] && echo 0 > $UBOOT_BAK_SW_WP flash_eraseall $UBOOT_BAK_DEV dd if=$FSBL_DEV of=$UBOOT_BAK_DEV bs=2048 count=128 dd if=$UBOOT_DEV of=$UBOOT_BAK_DEV bs=2048 seek=128 count=576 sync [ -f $UBOOT_BAK_SW_WP ] && echo 1 > $UBOOT_BAK_SW_WP fi touch /mnt/update/image_checked fi # check/recover fsbl image mtd_need_rec=0 mtd_bak_need_rec=0 data=`dd if=$FSBL_DEV bs=8 count=1 status=none |xxd -p` if [ $data == "ffffffffffffffff" ]; then mtd_need_rec=1 fi data=`dd if=$UBOOT_BAK_DEV bs=8 count=1 status=none |xxd -p` if [ $data == "ffffffffffffffff" ]; then mtd_bak_need_rec=1 fi if [ $mtd_need_rec == 0 ] && [ $mtd_bak_need_rec == 1 ]; then echo "Recover image fsbl_bak from fsbl!" dd if=$UBOOT_BAK_DEV of=/tmp/image_cache bs=2048 skip=128 count=576 #backup uboot_bak [ -f $UBOOT_BAK_SW_WP ] && echo 0 > $UBOOT_BAK_SW_WP flash_eraseall $UBOOT_BAK_DEV dd if=$FSBL_DEV of=$UBOOT_BAK_DEV bs=2048 count=128 dd if=/tmp/image_cache of=$UBOOT_BAK_DEV bs=2048 seek=128 count=576 sync [ -f $UBOOT_BAK_SW_WP ] && echo 1 > $UBOOT_BAK_SW_WP rm /tmp/image_cache elif [ $mtd_need_rec == 1 ] && [ $mtd_bak_need_rec == 0 ]; then echo "Recover image fsbl from fsbl_bak!" [ -f $FSBL_SW_WP ] && echo 0 > $FSBL_SW_WP flash_eraseall $FSBL_DEV dd if=$UBOOT_BAK_DEV of=$FSBL_DEV bs=2048 count=128 sync [ -f $FSBL_SW_WP ] && echo 1 > $FSBL_SW_WP elif [ $mtd_need_rec == 1 ] && [ $mtd_bak_need_rec == 1 ]; then echo "Both fsbl and fsbl_bak images are broken!" fi # check/recover u-boot image mtd_need_rec=0 mtd_bak_need_rec=0 data=`dd if=$UBOOT_DEV bs=8 count=1 status=none |xxd -p` if [ $data == "ffffffffffffffff" ]; then mtd_need_rec=1 fi data=`dd if=$UBOOT_BAK_DEV bs=8 skip=32768 count=1 status=none |xxd -p` if [ $data == "ffffffffffffffff" ]; then mtd_bak_need_rec=1 fi if [ $mtd_need_rec == 0 ] && [ $mtd_bak_need_rec == 1 ]; then echo "Recover image uboot_bak from uboot!" dd if=$UBOOT_BAK_DEV of=/tmp/image_cache bs=2048 count=128 #backup fsbl_bak [ -f $UBOOT_BAK_SW_WP ] && echo 0 > $UBOOT_BAK_SW_WP flash_eraseall $UBOOT_BAK_DEV dd if=$UBOOT_DEV of=$UBOOT_BAK_DEV bs=2048 seek=128 count=576 dd if=/tmp/image_cache of=$UBOOT_BAK_DEV bs=2048 count=128 sync [ -f $UBOOT_BAK_SW_WP ] && echo 1 > $UBOOT_BAK_SW_WP rm /tmp/image_cache elif [ $mtd_need_rec == 1 ] && [ $mtd_bak_need_rec == 0 ]; then echo "Recover image uboot from uboot_bak!" [ -f $UBOOT_SW_WP ] && echo 0 > $UBOOT_SW_WP flash_eraseall $UBOOT_DEV dd if=$UBOOT_BAK_DEV of=$UBOOT_DEV bs=2048 skip=128 count=576 sync [ -f $UBOOT_SW_WP ] && echo 1 > $UBOOT_SW_WP elif [ $mtd_need_rec == 1 ] && [ $mtd_bak_need_rec == 1 ]; then echo "Both uboot and uboot_bak images are broken!" fi exit $RETURNDATA这个shell脚本里面各行是啥意思
最新发布
08-30
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