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76 lines
2.7 KiB
76 lines
2.7 KiB
4 years ago
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#!/bin/bash
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#生成grub iso
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#根据论坛http://wuyou.net/forum.php?mod=viewthread&tid=386651
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#封装的命令，感谢rkr077大佬分享
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if [ $# -ne 3 ];then
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echo 参数校验失败
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echo '命令用法：'
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echo './createiso grub目录 输出iso文件名 回环设备'
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echo '例如：./createiso grub test.iso /dev/loop3'
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exit
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fi
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#回环设备
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loop=$3
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if [ `losetup -a|grep $loop|wc -l` -gt 0 ];then
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echo 回环设备$loop已被占用
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else
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echo '1.生成GRUB2的内核文件（core.img）'
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#先使用bootice的GRUB4DOS编辑器编写grub.cfg文件（以UTF-8编码保存），包含以下内容：
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config_name=grub.cfg
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grub_path=/boot/grub
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core_img=core.img
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iso_dir=iso
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efi_dir=efi
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efi_path=$efi_dir/boot
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efi_img=cdefi.img
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mnt_path=/mnt/image
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grub2cd_img=grub2cd.img
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bootx64=bootx64.efi
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bootia32=bootia32.efi
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cat << EOF > $config_name
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search.file $grub_path/$config_name root
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set prefix=$grub_path
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normal
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EOF
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#然后执行以下命令：
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#Legacy启动
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grub-mkimage -c $config_name -p $grub_path -o $core_img -O i386-pc iso9660 udf fat exfat ntfs ext2 part_msdos part_gpt search disk biosdisk normal halt reboot
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#64位UEFI启动
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grub-mkimage -c $config_name -p $grub_path -o $bootx64 -O x86_64-efi iso9660 udf fat exfat ntfs ext2 part_msdos part_gpt search disk normal halt reboot
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#32位UEFI启动
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grub-mkimage -c $config_name -p $grub_path -o $bootia32 -O i386-efi iso9660 udf fat exfat ntfs ext2 part_msdos part_gpt search disk normal halt reboot
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#将GRUB2安装目录下的i386-pc\cdboot.img文件复制到当前目录下，并用copy命令将cdboot.img和$core_img文件合并为$grub2cd_img
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cat /usr/lib/grub/i386-pc/cdboot.img $core_img >$grub2cd_img
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#2.生成EFI启动镜像
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echo '2.生成EFI启动镜像'
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mkdir -p $efi_path
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cp $bootx64 $bootia32 $efi_path
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#采用dd命令生成的镜像文件
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dd if=/dev/zero of=$efi_img bs=1 count=1M
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mkfs -t vfat $efi_img
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losetup $loop $efi_img #映射loop设备
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mount $loop $mnt_path #挂载loop设备
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cp -r $efi_path $mnt_path
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losetup -d $loop #解除loop映射
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umount $mnt_path #卸载loop设备
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#3.用genisoimage命令生成可启动iso文件
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echo '3.用genisoimage命令生成可启动iso文件'
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# #在iso文件夹下面新建boot\grub文件夹，将输入参数指定的grub目录拷贝到$iso_dir/$grub_path下
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mkdir -p $iso_dir/$grub_path
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cp -r $1/* $iso_dir/$grub_path
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# #将grub2cd.img和cdefi.img复制到iso文件夹下面。
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cp $efi_img $grub2cd_img $iso_dir
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# #执行以下命令生成iso文件
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genisoimage -J -l -allow-lowercase -R -V GRUB2 -joliet-long -no-emul-boot -boot-load-size 4 -boot-info-table -b $grub2cd_img -eltorito-alt-boot -b $efi_img -no-emul-boot -o $2 $iso_dir
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rm -rf $core_img $bootx64 $bootia32 $config_name $grub2cd_img $efi_img $iso_dir $efi_dir
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fi
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