143 lines
4.5 KiB
Bash
143 lines
4.5 KiB
Bash
#!/bin/bash
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#===============================================================================
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# 从SD卡操作eMMC备份脚本
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#===============================================================================
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set -e
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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NC='\033[0m'
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error_msg() { echo -e "${RED}[ERROR] $1${NC}" >&2; exit 1; }
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info_msg() { echo -e "${GREEN}[INFO] $1${NC}"; }
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warn_msg() { echo -e "${YELLOW}[WARN] $1${NC}"; }
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[[ $EUID -eq 0 ]] || error_msg "需要root权限"
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EMMC_DEV="/dev/mmcblk0"
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USB_DIR="/mnt/XIN_USB/rock5c"
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OUTPUT_FILE="${USB_DIR}/rock5c_emmc_$(date +%Y%m%d_%H%M%S).img"
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info_msg "从SD卡备份eMMC..."
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info_msg "eMMC设备: ${EMMC_DEV}"
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info_msg "输出到: ${OUTPUT_FILE}"
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# 检查设备
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[[ -b "${EMMC_DEV}" ]] || error_msg "eMMC设备不存在: ${EMMC_DEV}"
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[[ -d "${USB_DIR}" ]] || error_msg "USB目录不存在: ${USB_DIR}"
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# 检查eMMC没有被挂载
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if mount | grep -q mmcblk0; then
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error_msg "eMMC还在使用中！请确保从SD卡启动"
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fi
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info_msg "✅ eMMC设备可安全操作"
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# 步骤1: 检查eMMC分区信息
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info_msg "步骤1: 分析eMMC分区..."
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parted -s ${EMMC_DEV} unit MB print
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# 检查eMMC上的数据大小
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info_msg "检查eMMC数据使用量..."
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TEMP_MOUNT="/tmp/check_emmc"
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mkdir -p "${TEMP_MOUNT}"
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# 临时挂载检查使用量
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mount ${EMMC_DEV}p2 "${TEMP_MOUNT}" -o ro
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EMMC_USED=$(df --block-size=1M "${TEMP_MOUNT}" | tail -1 | awk '{print $3}')
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umount "${TEMP_MOUNT}"
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mount ${EMMC_DEV}p1 "${TEMP_MOUNT}" -o ro
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EMMC_BOOT_USED=$(df --block-size=1M "${TEMP_MOUNT}" | tail -1 | awk '{print $3}')
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umount "${TEMP_MOUNT}"
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rm -rf "${TEMP_MOUNT}"
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info_msg "eMMC使用情况: Root ${EMMC_USED}MB + Boot ${EMMC_BOOT_USED}MB"
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# 步骤2: 智能收缩eMMC分区
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info_msg "步骤2: 智能收缩eMMC分区..."
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# 文件系统检查
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e2fsck -f -y ${EMMC_DEV}p2
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# 先尝试收缩到最小值
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info_msg "计算文件系统最小大小..."
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resize2fs -M ${EMMC_DEV}p2
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# 获取收缩后的实际大小
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FS_SIZE_BLOCKS=$(dumpe2fs -h ${EMMC_DEV}p2 2>/dev/null | grep "^Block count:" | awk '{print $3}')
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FS_SIZE_MB=$(( (FS_SIZE_BLOCKS * 4) / 1024 + 200 )) # 块大小4KB + 200MB缓冲
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info_msg "文件系统最小大小: ${FS_SIZE_MB}MB"
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# 扩展一点给缓冲空间
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SHRINK_TARGET=$((FS_SIZE_MB + 300))
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resize2fs ${EMMC_DEV}p2 ${SHRINK_TARGET}M
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# 收缩分区
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P2_START=$(parted -s ${EMMC_DEV} unit B print | grep "^ 2" | awk '{print $2}' | sed 's/B$//')
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NEW_P2_END=$((P2_START + SHRINK_TARGET * 1048576))
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# 记录原始分区信息
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parted -s ${EMMC_DEV} unit B print > "${USB_DIR}/emmc_original_layout.txt"
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ORIGINAL_P2_END=$(parted -s ${EMMC_DEV} unit B print | grep "^ 2" | awk '{print $3}' | sed 's/B$//')
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# 重新创建收缩的分区
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parted -s ${EMMC_DEV} rm 2
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parted -s ${EMMC_DEV} mkpart primary ext4 ${P2_START}B ${NEW_P2_END}B
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info_msg "✅ eMMC分区已收缩"
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# 步骤3: 备份收缩后的eMMC
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info_msg "步骤3: 备份收缩后的eMMC..."
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BACKUP_SIZE_MB=$(( (NEW_P2_END / 1048576) + 100 ))
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dd if=${EMMC_DEV} of="${OUTPUT_FILE}" bs=1M count=${BACKUP_SIZE_MB} status=progress
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info_msg "✅ eMMC备份完成"
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# 步骤4: 恢复eMMC原始大小
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info_msg "步骤4: 恢复eMMC原始分区大小..."
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parted -s ${EMMC_DEV} rm 2
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parted -s ${EMMC_DEV} mkpart primary ext4 ${P2_START}B ${ORIGINAL_P2_END}B
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resize2fs ${EMMC_DEV}p2
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info_msg "✅ eMMC已恢复原始大小"
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# 验证备份镜像
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info_msg "步骤5: 验证备份镜像..."
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LOOP_DEV=$(losetup -P -f --show "${OUTPUT_FILE}")
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sleep 3
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if [[ -b "${LOOP_DEV}p1" ]] && [[ -b "${LOOP_DEV}p2" ]]; then
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info_msg "✅ 备份镜像分区表完整"
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parted -s "${LOOP_DEV}" print
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# 检查文件系统
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e2fsck -n "${LOOP_DEV}p1" && echo "✅ Boot分区文件系统正常"
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e2fsck -n "${LOOP_DEV}p2" && echo "✅ Root分区文件系统正常"
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else
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warn_msg "❌ 备份镜像分区表有问题"
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fi
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losetup -d "${LOOP_DEV}"
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FINAL_SIZE=$(du -h "${OUTPUT_FILE}" | cut -f1)
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FINAL_SIZE_ACTUAL=$(du --apparent-size -h "${OUTPUT_FILE}" | cut -f1)
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info_msg "========================================="
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info_msg "🎉 eMMC备份成功完成!"
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info_msg "========================================="
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info_msg "📁 备份文件: ${OUTPUT_FILE}"
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info_msg "📏 实际大小: ${FINAL_SIZE}"
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info_msg "📐 逻辑大小: ${FINAL_SIZE_ACTUAL}"
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info_msg "💾 eMMC已恢复原状"
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info_msg ""
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info_msg "🚀 部署到新设备:"
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info_msg " dd if=$(basename ${OUTPUT_FILE}) of=/dev/mmcblk0 bs=4M status=progress"
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info_msg ""
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info_msg "✅ 包含完整分区表和bootloader"
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info_msg "✅ 保持所有原始配置不变"
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info_msg "✅ 可在任意Rock5c上启动"
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info_msg "=========================================" |