modify raspberrypi backup script

tool/RaspberryPi/backup_system.sh

@@ -1,29 +1,41 @@
-#!/bin/sh
+#!/bin/bash
 ######################################################
 ################## TODO: settings#####################
 src_root_device=/dev/sdc2 #/dev/root
 src_boot_device=/dev/sdc1 #/dev/mmcblk0p1
 ######################################################
 
+green="\e[32;1m"
+normal="\e[0m"
 
-echo '\ninstall software\n'
+echo -e "${green} \ninstall software\n ${normal}"
 sudo apt-get install -y dosfstools dump parted kpartx
-echo '\ninstall software complete\n'
+echo -e "${green} \ninstall software complete\n ${normal}"
 
+echo -e "${green}create image now\n ${normal}"
 used_size=`df -P | grep $src_root_device | awk '{print $3}'`
 boot_size=`df -P | grep $src_boot_device | awk '{print $2}'`
-count=`echo "$used_size*1.1+$boot_size+2"|bc|awk '{printf("%.0f",$1)}'`
+if [ "x${used_size}" != "x" ] && [ "x${boot_size}" != "x" ];then
+	count=`echo "${used_size}*1.1+${boot_size}+2"|bc|awk '{printf("%.0f",$1)}'`
+else
+	echo "device $src_root_device or $src_boot_device not exist,mount first"
+	exit 0;
+fi
 echo boot size:$boot_size,used_size:$used_size,block count: $count
 echo $(($boot_size/1024+1))
 sudo dd if=/dev/zero of=backup.img bs=1k count=$count
 sudo parted backup.img --script -- mklabel msdos
 sudo parted backup.img --script -- mkpart primary fat32 1M $(($boot_size/1024+1))M #(nByte/512)s
 sudo parted backup.img --script -- mkpart primary ext4 $(($boot_size/1024+1))M -1
 
+echo -e "${green}mount loop device and copy files to image\n${normal}"
 loopdevice=`sudo losetup --show -f backup.img`
 echo $loopdevice
 device=`sudo kpartx -va $loopdevice`
-device=`echo $device | sed -E 's/.*(loop[0-9])p.*/\1/g' | head -1`
+echo $device
+device=`echo $device | sed -E 's/.*(loop[0-9]*)p.*/\1/g' | head -1`
+# device=`echo $device |awk '{print $3}' | head -1`
+echo $device
 device="/dev/mapper/${device}"
 boot_device="${device}p1"
 root_device="${device}p2"
@@ -32,22 +44,35 @@ sudo mkfs.vfat $boot_device
 sudo mkfs.ext4 $root_device
 sudo mkdir -p /media/img_to
 sudo mkdir /media/img_src
+mount_path=`df -h|grep ${src_boot_device}|awk '{print $6}'`
+if [ "x${mount_path}" == "x" ];then
+  sudo mount -t vfat $src_boot_device /media/img_src
+  mount_path=/media/img_src
+fi
 sudo mount -t vfat $boot_device /media/img_to
-sudo mount -t vfat $src_boot_device /media/img_src
-sudo cp -rfp /media/img_src/* /media/img_to
+echo -e "${green}copy /boot${normal}"
+sudo cp -rfp ${mount_path}/* /media/img_to
 sudo umount /media/img_to
-sudo umount /media/img_src
 
-sudo chattr +d backup.img #exclude img file from backup
+sudo chattr +d backup.img #exclude img file from backup(support in ext* file system)
+echo "if 'Operation not supported while reading flags on backup.img' comes up, ignore it"
 
+mount_path=`df -h|grep ${src_root_device}|awk '{print $6}'`
+echo root mount path: $mount_path
+if [ "x${mount_path}" == "x" ];then
+  sudo mount -t ext4 $src_root_device /media/img_src
+  mount_path=/media/img_src
+fi
 sudo mount -t ext4 $root_device /media/img_to
-sudo mount -t ext4 $src_root_device /media/img_src
+
 cd /media/img_to
-sudo dump -0af - /media/img_src | sudo restore -rf -
+echo -e "${green}copy /${normal}"
+sudo dump -0auf - ${mount_path} | sudo restore -rf -
 cd
 sudo umount /media/img_to
-sudo umount /media/img_src
+
 sudo kpartx -d $loopdevice
 sudo losetup -d $loopdevice
 sudo rm /media/img_to /media/img_src -rf
 
+echo -e "${green}\nbackup complete\n${normal}"