如何编译grub2的rpm包

获取源码包 src.rpm包

## 附也可以用 公版的 grub-2.02~beta2.tar.xz （实测也能成功）
    http://alpha.gnu.org/gnu/grub/
    # https://github.com/rhboot/grub2    # 这个没尝试过过

## 附、grub2 相关软件包的命令作用
    http://doc.yonyoucloud.com/doc/LFS-BOOK-7.7-systemd/chapter06/grub.html

## 将下列补丁包上传到目录 /root/rpmbuild/SOURCES/
0001-Cryptomount-support-LUKS-detached-header.patch
0002-Cryptomount-support-key-files.patch
0003-Cryptomount-luks-allow-multiple-passphrase-attempts.patch
0004-Cryptomount-support-plain-dm-crypt.patch
0005-Cryptomount-support-for-hyphens-in-UUID.patch
0006-Retain-constness-of-parameters.patch
0007-Add-support-for-using-a-whole-device-as-a-keyfile.patch

## 编辑编译时引用的补丁列表文件，增加如下内容（实测 0003 及以后的无法编译成功，就注释了）
    vi /root/rpmbuild/SOURCES/grub.patches
Patch0500: 0001-Cryptomount-support-LUKS-detached-header.patch
Patch0501: 0002-Cryptomount-support-key-files.patch
#Patch0502: 0003-Cryptomount-luks-allow-multiple-passphrase-attempts.patch
#Patch0503: 0004-Cryptomount-support-plain-dm-crypt.patch
#Patch0504: 0005-Cryptomount-support-for-hyphens-in-UUID.patch
#Patch0505: 0006-Retain-constness-of-parameters.patch
#Patch0506: 0007-Add-support-for-using-a-whole-device-as-a-keyfile.patch

# 执行编译
    rpmbuild -ba rpmbuild/SPECS/grub2.spec

# 如何查看a目录下 所有文件是否包含 aaa这个字符
    grep -rl "aaa" a/
    grep -rl "Attempting to decrypt master key..." ./

## 修改文件
    vi ./grub-core/disk/geli.c
    vi ./grub-core/disk/luks.c 

## 打包成品
    cd /root/rpmbuild/
    tar zcvf my-grub2.tar.gz RPMS

## gcc升级到9版本（貌似不需要）

## 解包（会自动在/root/ 目录下生成rpmbuild 相关目录 ）
    rpm -ivh grub2-2.02-0.87.0.2.el7.centos.14.src.rpm

## 补丁
    https://grub.johnlane.ie/

## 加载补丁
    # 下载补丁
    wget -O /root/rpmbuild/SOURCES/0002-Cryptomount-support-key-files.patch https://grub.johnlane.ie/assets/0002-Cryptomount-support-key-files.patch

    # 上传补丁并核查到 目录 /root/rpmbuild/SOURCES
    ls /root/rpmbuild/SOURCES/ | grep 0002-Cryptomount-support-key-files.patch

    # 把补丁放在 /root/rpmbuild/SOURCES/ 目录下，名称格式 0499-safemath-add-grub_cast-for-gcc-5.1.patch
    # 在下面最末行按照格式添加
    # vi /root/rpmbuild/SOURCES/grub.patches
        # 快捷方式
        echo "Patch0500: 0002-Cryptomount-support-key-files.patch" >> /root/rpmbuild/SOURCES/grub.patches

    # 把补丁应用到源码（Tips: -p1 是只应用补丁的路径层级，有-p0 表示不去除 路径层级、-p1 去掉路径的第 1 层目录、-p2 去掉路径的前 2 层目录）
    # 如何查看补丁的层级 head -n 20 0002-Cryptomount-support-key-files.patch 有如下输出类型的 用 -p1
    # diff --git a/grub-core/disk/cryptodisk.c b/grub-core/disk/cryptodisk.c  #这个 a/xxx b/xxx 格式的

    cd /root/rpmbuild/BUILD/grub-2.02~beta2/grub-2.02~beta2

    # 把补丁上传到 /root/rpmbuild/SOURCES/

    # 然后将 grub的源码压缩包 复制一份 然后解压
    cp /root/rpmbuild/SOURCES/grub-2.02~beta2.tar.xz /mnt/
    cd /mnt
    tar xf grub-2.02~beta2.tar.xz
    cd /mnt/grub-2.02~beta2

    # 导入补丁
    patch -p1 < /root/rpmbuild/SOURCES/0001-Cryptomount-support-LUKS-detached-header.patch
    patch -p1 < /root/rpmbuild/SOURCES/0002-Cryptomount-support-key-files.patch

    # 把带有额外补丁的源码，重新压缩为xz格式，并复制到原本的路径
    cd /mnt
    tar -cJf grub-2.02~beta2.tar.xz grub-2.02~beta2
    \cp -af grub-2.02~beta2.tar.xz /root/rpmbuild/SOURCES/

# 执行编译
    rpmbuild -ba rpmbuild/SPECS/grub2.spec

会得到
    Wrote: /root/rpmbuild/SRPMS/grub2-2.02-0.87.0.2.el7.14.src.rpm
    Wrote: /root/rpmbuild/RPMS/x86_64/grub2-2.02-0.87.0.2.el7.14.x86_64.rpm
    Wrote: /root/rpmbuild/RPMS/noarch/grub2-common-2.02-0.87.0.2.el7.14.noarch.rpm
    Wrote: /root/rpmbuild/RPMS/x86_64/grub2-tools-2.02-0.87.0.2.el7.14.x86_64.rpm
    Wrote: /root/rpmbuild/RPMS/x86_64/grub2-tools-minimal-2.02-0.87.0.2.el7.14.x86_64.rpm
    Wrote: /root/rpmbuild/RPMS/x86_64/grub2-tools-extra-2.02-0.87.0.2.el7.14.x86_64.rpm
    Wrote: /root/rpmbuild/RPMS/x86_64/grub2-efi-x64-2.02-0.87.0.2.el7.14.x86_64.rpm
    Wrote: /root/rpmbuild/RPMS/noarch/grub2-efi-x64-modules-2.02-0.87.0.2.el7.14.noarch.rpm
    Wrote: /root/rpmbuild/RPMS/x86_64/grub2-efi-x64-cdboot-2.02-0.87.0.2.el7.14.x86_64.rpm
    Wrote: /root/rpmbuild/RPMS/x86_64/grub2-efi-ia32-2.02-0.87.0.2.el7.14.x86_64.rpm
    Wrote: /root/rpmbuild/RPMS/noarch/grub2-efi-ia32-modules-2.02-0.87.0.2.el7.14.noarch.rpm
    Wrote: /root/rpmbuild/RPMS/x86_64/grub2-efi-ia32-cdboot-2.02-0.87.0.2.el7.14.x86_64.rpm
    Wrote: /root/rpmbuild/RPMS/x86_64/grub2-pc-2.02-0.87.0.2.el7.14.x86_64.rpm
    Wrote: /root/rpmbuild/RPMS/noarch/grub2-pc-modules-2.02-0.87.0.2.el7.14.noarch.rpm
    Wrote: /root/rpmbuild/RPMS/x86_64/grub2-debuginfo-2.02-0.87.0.2.el7.14.x86_64.rpm

+++++++++++++++下载后改名，改前面的序号
0001-Cryptomount-support-LUKS-detached-header.patch
0002-Cryptomount-support-key-files.patch
0003-Cryptomount-luks-allow-multiple-passphrase-attempts.patch
0004-Cryptomount-support-plain-dm-crypt.patch
0005-Cryptomount-support-for-hyphens-in-UUID.patch
0006-Retain-constness-of-parameters.patch
0007-Add-support-for-using-a-whole-device-as-a-keyfile.patch
+++++++++++++++
0500-Cryptomount-support-LUKS-detached-header.patch
0501-Cryptomount-support-key-files.patch
0502-Cryptomount-luks-allow-multiple-passphrase-attempts.patch
0503-Cryptomount-support-plain-dm-crypt.patch
0504-Cryptomount-support-for-hyphens-in-UUID.patch
0505-Retain-constness-of-parameters.patch
0506-Add-support-for-using-a-whole-device-as-a-keyfile.patch
=======

Patch0500: 0500-Cryptomount-support-LUKS-detached-header.patch
Patch0501: 0501-Cryptomount-support-key-files.patch
Patch0502: 0502-Cryptomount-luks-allow-multiple-passphrase-attempts.patch
Patch0503: 0503-Cryptomount-support-plain-dm-crypt.patch
Patch0504: 0504-Cryptomount-support-for-hyphens-in-UUID.patch
Patch0505: 0505-Retain-constness-of-parameters.patch
Patch0506: 0506-Add-support-for-using-a-whole-device-as-a-keyfile.patch

+++++++++导入是有顺序的
patch -p1 < /root/rpmbuild/SOURCES/0001-Cryptomount-support-LUKS-detached-header.patch
patch -p1 < /root/rpmbuild/SOURCES/0002-Cryptomount-support-key-files.patch
patch -p1 < /root/rpmbuild/SOURCES/0003-Cryptomount-luks-allow-multiple-passphrase-attempts.patch
#导入这行会报错，继续导入到时不会报，建议以下都不导入
patch -p1 < /root/rpmbuild/SOURCES/0004-Cryptomount-support-plain-dm-crypt.patch
# 继续导入下面的，不会报错
patch -p1 < /root/rpmbuild/SOURCES/0005-Cryptomount-support-for-hyphens-in-UUID.patch
patch -p1 < /root/rpmbuild/SOURCES/0006-Retain-constness-of-parameters.patch
patch -p1 < /root/rpmbuild/SOURCES/0007-Add-support-for-using-a-whole-device-as-a-keyfile.patch

=======验证cryptomount  是否支持 -k

++++
git am --resolved
git am --skip
git am --abort

bios方式安装（8个包）
    rpm -ivh --force noarch/grub2-common-2.02-0.87.0.2.el7.14.noarch.rpm
    rpm -ivh --force noarch/grub2-pc-modules-2.02-0.87.0.2.el7.14.noarch.rpm
    rpm -ivh --force x86_64/grub2-2.02-0.87.0.2.el7.14.x86_64.rpm
    rpm -ivh --force x86_64/grub2-debuginfo-2.02-0.87.0.2.el7.14.x86_64.rpm
    rpm -ivh --force x86_64/grub2-pc-2.02-0.87.0.2.el7.14.x86_64.rpm
    rpm -ivh --force x86_64/grub2-tools-2.02-0.87.0.2.el7.14.x86_64.rpm
    rpm -ivh --force x86_64/grub2-tools-extra-2.02-0.87.0.2.el7.14.x86_64.rpm
    rpm -ivh --force x86_64/grub2-tools-minimal-2.02-0.87.0.2.el7.14.x86_64.rpm

    grub2-install /dev/sda    # 执行完这一步后，重启时 cyrptomount 才支持 -k 参数
    grub2-mkconfig -o /boot/grub2/grub.cfg
    # grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg

uefi方式安装（9个包）
    rpm -ivh --force noarch/grub2-common-2.02-0.87.0.2.el7.14.noarch.rpm
    rpm -ivh --force noarch/grub2-pc-modules-2.02-0.87.0.2.el7.14.noarch.rpm
    rpm -ivh --force noarch/grub2-efi-x64-modules-2.02-0.87.0.2.el7.14.noarch.rpm
    rpm -ivh --force x86_64/grub2-2.02-0.87.0.2.el7.14.x86_64.rpm
    rpm -ivh --force x86_64/grub2-pc-2.02-0.87.0.2.el7.14.x86_64.rpm
    rpm -ivh --force x86_64/grub2-tools-extra-2.02-0.87.0.2.el7.14.x86_64.rpm
    rpm -ivh --force x86_64/grub2-tools-minimal-2.02-0.87.0.2.el7.14.x86_64.rpm
    rpm -ivh --force x86_64/grub2-efi-x64-2.02-0.87.0.2.el7.14.x86_64.rpm
    rpm -ivh --force x86_64/grub2-tools-2.02-0.87.0.2.el7.14.x86_64.rpm

    # 注意uefi模式下，引导不是安装到磁盘设备的
    grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg
    grub2-install --target=x86_64-efi --efi-directory=/boot/efi

# 正确方法
    rpm -ivh --force grub2-*

    cp noarch/grub2-common-2.02-0.87.0.2.el7.14.noarch.rpm          bios/
    cp noarch/grub2-pc-modules-2.02-0.87.0.2.el7.14.noarch.rpm      bios/
    cp x86_64/grub2-2.02-0.87.0.2.el7.14.x86_64.rpm                 bios/
    cp x86_64/grub2-debuginfo-2.02-0.87.0.2.el7.14.x86_64.rpm       bios/
    cp x86_64/grub2-pc-2.02-0.87.0.2.el7.14.x86_64.rpm              bios/
    cp x86_64/grub2-tools-2.02-0.87.0.2.el7.14.x86_64.rpm           bios/
    cp x86_64/grub2-tools-extra-2.02-0.87.0.2.el7.14.x86_64.rpm     bios/
    cp x86_64/grub2-tools-minimal-2.02-0.87.0.2.el7.14.x86_64.rpm   bios/