231 lines
7.0 KiB
Plaintext
231 lines
7.0 KiB
Plaintext
|
#!/bin/bash
|
|||
|
|
|
|||
|
|
BACKUP_FLAG=backup
|
|||
|
|
RESTORE_FLAG=restore
|
|||
|
|
|
|||
|
|
# 把这个文件放在 /usr/share/initramfs-tools/scripts/local-bottom/ 目录下。
|
|||
|
|
# 权限为 0755，在自动更新initrd时，这个脚本就被放到initrd中了，例如，
|
|||
|
|
# update-initramfs -u
|
|||
|
|
# 更新后，这个脚本将在initrd 运行到 local-bottom 阶段时自动执行。
|
|||
|
|
# 此时根分区已经挂载到了${rootmnt}下，可以直接访问该分区的文件。
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
# PREREQ指定需要在什么脚本之后执行（同目录下的），也就是指定该脚本的依赖，以确定执行顺序。
|
|||
|
|
# 如果没有依赖，就可以是空字符串。
|
|||
|
|
PREREQ=""
|
|||
|
|
|
|||
|
|
prereqs()
|
|||
|
|
{
|
|||
|
|
echo "$PREREQ"
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
case $1 in
|
|||
|
|
prereqs)
|
|||
|
|
prereqs
|
|||
|
|
exit 0
|
|||
|
|
;;
|
|||
|
|
esac
|
|||
|
|
|
|||
|
|
# 上述部分是initramfs脚本的固定格式，不用动它。
|
|||
|
|
# 除非有依赖，才需要改 PREREQ 的值。
|
|||
|
|
|
|||
|
|
display_result()
|
|||
|
|
{
|
|||
|
|
if [ $RET -eq 200 ]; then
|
|||
|
|
plymouth message --text="Can't find /etc/.bootinfo."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 201 ]; then
|
|||
|
|
plymouth message --text="Can't open /etc/.bootinfo."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 202 ]; then
|
|||
|
|
plymouth message --text="/etc/.bootinfo is not correct."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 100 ]; then
|
|||
|
|
plymouth message --text="The backup disk space is not enough, please delete unnecessary backups."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 101 ]; then
|
|||
|
|
plymouth message --text="The backup disk should be /backup"
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 300 ]; then
|
|||
|
|
plymouth message --text="There are not any good backups，and you can't restore the system."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 301 ]; then
|
|||
|
|
plymouth message --text="There is not the backup directory of your selection, and you can't restore it."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 302 ]; then
|
|||
|
|
plymouth message --text="The restore process can't be started."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 303 ]; then
|
|||
|
|
plymouth message --text="Failed to restore the system, please redo it."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 401 ]; then
|
|||
|
|
plymouth message --text="The mount process for backup disk can't be started."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 402 ]; then
|
|||
|
|
plymouth message --text="Failed to wait for the process for backup disk."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 403 ]; then
|
|||
|
|
plymouth message --text="The backup disk does not exist or it is not mounted."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 501 ]; then
|
|||
|
|
plymouth message --text="Can't start the backup process."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 502 ]; then
|
|||
|
|
plymouth message --text="Failed to backup the system."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 700 ]; then
|
|||
|
|
plymouth message --text="The usage of mount_fstab is not correct."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 701 ]; then
|
|||
|
|
plymouth message --text="Failed to backup the system because there is not /etc/fstab."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
elif [ $RET -eq 702 ]; then
|
|||
|
|
plymouth message --text="Can't to open /etc/fstab."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
fi
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
# 需要先指定BACKUP_FLAG，例如设置为 BACKUP_FLAG=backup，那么内核参数就可以选择下述两种方式的一种了
|
|||
|
|
# 1. backup 只要有backup，就表示需要备份
|
|||
|
|
# 2. backup=0 或者 backup=1 0表示不用备份，1表示需要备份。
|
|||
|
|
# 当然，还可以选择别的字符串做关键字，但一定要指定BACKUP_FLAG内容。
|
|||
|
|
#BACKUP_FLAG=
|
|||
|
|
NEED_BACKUP=
|
|||
|
|
NEED_RESTORE=
|
|||
|
|
# 针对 BACKUP_FLAG 为简单字符串（非键值对）的情况，可以这样获取内核参数。
|
|||
|
|
for x in $(cat /proc/cmdline); do
|
|||
|
|
if [ "$x" = "$BACKUP_FLAG" ]; then
|
|||
|
|
NEED_BACKUP=y
|
|||
|
|
fi
|
|||
|
|
done
|
|||
|
|
|
|||
|
|
for x in $(cat /proc/cmdline); do
|
|||
|
|
if [ "$x" = "$RESTORE_FLAG" ]; then
|
|||
|
|
NEED_RESTORE=y
|
|||
|
|
fi
|
|||
|
|
done
|
|||
|
|
|
|||
|
|
# 然后就可以根据 $NEED_BACKUP 来进行操作了。
|
|||
|
|
|
|||
|
|
# 如果没有发现需要备份的标记，直接退出脚本，继续启动系统。
|
|||
|
|
|
|||
|
|
if [ "$NEED_BACKUP" = "y" ]; then
|
|||
|
|
mkdir /backup
|
|||
|
|
#useless: . /scripts/backup #就是本目录下的backup
|
|||
|
|
#useless: mount_fstab #定义在backup脚本中
|
|||
|
|
|
|||
|
|
#如果没有${rootmnt}/etc/fstab，则系统坏了，只能还原而不能备份.
|
|||
|
|
if [ ! -e ${rootmnt}/etc/fstab ]; then
|
|||
|
|
plymouth message --text="The system has been destroyed and can not be backuped."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
exit 0
|
|||
|
|
fi
|
|||
|
|
if [ ! -e ${rootmnt}/etc/.bootinfo ]; then
|
|||
|
|
plymouth message --text="The system has been destroyed and you can restore it in the next version."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
exit 0
|
|||
|
|
fi
|
|||
|
|
|
|||
|
|
mount_fstab_efi ${rootmnt} mount
|
|||
|
|
#plymouth message --text="正在备份系统"
|
|||
|
|
plymouth message --text="Backuping the system, please wait for a moment."
|
|||
|
|
backup-auto-efi --autobackup ${rootmnt} /backup
|
|||
|
|
|
|||
|
|
RET=$?
|
|||
|
|
display_result $RET
|
|||
|
|
|
|||
|
|
#plymouth message --text="系统备份完成"
|
|||
|
|
plymouth message --text="The system has been backuped."
|
|||
|
|
#mount_fstab ${rootmnt} umount #because root
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
exit 0
|
|||
|
|
fi
|
|||
|
|
|
|||
|
|
if [ "$NEED_RESTORE" = "y" ]; then
|
|||
|
|
#如果没有${rootmnt}/etc/fstab，则系统坏了，应该能还原，但需要在下一个版本中支持。
|
|||
|
|
if [ ! -e ${rootmnt}/etc/fstab ]; then
|
|||
|
|
plymouth message --text="The system has been destroyed and you can restore it in the next version."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
exit 0
|
|||
|
|
fi
|
|||
|
|
if [ ! -e ${rootmnt}/etc/.bootinfo ]; then
|
|||
|
|
plymouth message --text="The system has been destroyed and you can restore it in the next version."
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
exit 0
|
|||
|
|
fi
|
|||
|
|
|
|||
|
|
mount_fstab_efi ${rootmnt} mount
|
|||
|
|
mkdir /backup
|
|||
|
|
#plymouth message --text="正在还原系统"
|
|||
|
|
plymouth message --text="Restoring the system, please wait for a moment."
|
|||
|
|
mount -o remount,rw ${rootmnt}
|
|||
|
|
#. /scripts/backup
|
|||
|
|
backup-auto-efi --autorestore ${rootmnt} /backup
|
|||
|
|
|
|||
|
|
RET=$?
|
|||
|
|
display_result $RET
|
|||
|
|
|
|||
|
|
if [ ! -e ${rootmnt}/proc ]; then
|
|||
|
|
mkdir ${rootmnt}/proc
|
|||
|
|
fi
|
|||
|
|
|
|||
|
|
if [ ! -e ${rootmnt}/sys ]; then
|
|||
|
|
mkdir ${rootmnt}/sys
|
|||
|
|
fi
|
|||
|
|
|
|||
|
|
if [ ! -e ${rootmnt}/dev ]; then
|
|||
|
|
mkdir ${rootmnt}/dev
|
|||
|
|
fi
|
|||
|
|
|
|||
|
|
if [ ! -e ${rootmnt}/run ]; then
|
|||
|
|
mkdir ${rootmnt}/run
|
|||
|
|
fi
|
|||
|
|
|
|||
|
|
if [ ! -e ${rootmnt}/backup ]; then
|
|||
|
|
mkdir ${rootmnt}/backup
|
|||
|
|
fi
|
|||
|
|
|
|||
|
|
#plymouth message --text="系统还原完成"
|
|||
|
|
plymouth message --text="The system has been restored."
|
|||
|
|
#/scripts/mount_fstab ${rootmnt} umount #because root
|
|||
|
|
sleep 3
|
|||
|
|
reboot
|
|||
|
|
exit 0
|
|||
|
|
fi
|
|||
|
|
|
|||
|
|
# 否则
|
|||
|
|
# TODO 执行备份操作
|
|||
|
|
|
|||
|
|
# 此时根分区已经挂载在 ${rootmnt} 处了，直接使用 ${rootmnt} 就可以了。
|
|||
|
|
# 例如查看lsb-release文件
|
|||
|
|
# cat ${rootmnt}/etc/lsb-release
|
|||
|
|
# 如果想要根据 UUID 或 LABEL 来确定分区，还可以执行blkid命令。例如，
|
|||
|
|
# /sbin/blkid -U <UUID> 该命令返回UUID对应的分区设备
|
|||
|
|
# /sbin/blkid -L <LABEL> 该命令返回LABEL对应的分区设备
|
|||
|
|
# 如果需要安装一些命令，需要写一个initramfs的hook脚本。
|
|||
|
|
|
|||
|
|
exit 0
|