/*********************************************************************************

 *                  Buildroot 打包文件系统流程跟踪

 * 说明：

 *     之前在使用Buildroot过程中，发现其自身生成的rootfs.tar.bz2文件系统可以正常运行

 * 但自己使用命令打包的文件系统就有问题，于是跟一下其脚本运行的输出信息，原来使用到

 * 了fakeroot来模拟root权限。

 *

 *                                              2017-10-11 深圳 南山平山村 曾剑锋

 ********************************************************************************/

一、输出信息分析：

    [7m>>>   Finalizing target directory[27m

    rm -f /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/glib-2.0/schemas/*.xml /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/usr/share/glib-2.0/schemas/*.dtd

    /home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/bin/glib-compile-schemas /home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/arm-buildroot-linux-gnueabi/sysroot/usr/share/glib-2.0/schemas --targetdir=/home/zengjf/zengjfos/buildroot-2017.02.3/output/target/usr/share/glib-2.0/schemas

    No schema files found: doing nothing.

    PYTHONPATH="/home/zengjf/zengjfos/buildroot-2017.02.3/output/target/usr/lib/python3.5/sysconfigdata/:/home/zengjf/zengjfos/buildroot-2017.02.3/output/target/usr/lib/python3.5/site-packages/" /home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/bin/python3.5 support/scripts/pycompile.py /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/usr/lib/python3.5

    find /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/usr/lib/python3.5 -name '*.py' -print0 | xargs -0 --no-run-if-empty rm -f

    find /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/usr/lib/python3.5 -name '*.opt-1.pyc' -print0 -o -name '*.opt-2.pyc' -print0 | xargs -0 --no-run-if-empty rm -f

    # 创建etc目录

    mkdir -p /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc

    # 创建hostname目录

    echo "AplexOS" > /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc/hostname

    # 使用sed对文件进行操作

    /bin/sed -i -e '$a \127.0.1.1\tAplexOS' -e '/^127.0.1.1/d' /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc/hosts

    mkdir -p /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc

    # 登录前欢迎语句

    echo "Welcome to AplexOS" > /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc/issue

    # 创建network目录

    mkdir -p /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc/network/

    # 设置loopback设备，这也就是为什么interfaces如果这里不进行修改，每次都会被修改的原因

    ( echo "# interface file auto-generated by buildroot"; echo ; echo "auto lo"; echo "iface lo inet loopback"; ) > /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc/network/interfaces

    # 设置eth0设备

    ( echo ; echo "auto eth0"; echo "iface eth0 inet static"; echo "     address 192.168.1.202"; echo "     netmask 255.255.255.0"; echo "     broadcast 0.0.0.0"; echo "     gateway 192.168.1.1"; ) >> /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc/network/interfaces

    /usr/bin/install -m 0755 -D package/skeleton//nfs_check /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc/network/nfs_check

    # 生成root账户及密码

    /bin/sed -i -e s,^root:[^:]*:,root:"`/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/bin/mkpasswd -m "md5" "aplex"`":, /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc/shadow

    # debug port

    /bin/sed -i -e '/# GENERIC_SERIAL$/s~^.*#~console::respawn:/sbin/getty -L  console 0 vt100 #~' /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc/inittab

    # 修改inittab文件

    /bin/sed -i -e '/^#.*-o remount,rw \/$/s~^#\+~~' /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/etc/inittab

    rm -f /home/zengjf/zengjfos/buildroot-2017.02.3/output/build/locales.nopurge

    for i in C en_US locale-archive; do echo $i >> /home/zengjf/zengjfos/buildroot-2017.02.3/output/build/locales.nopurge; done

    for dir in /home/zengjf/zengjfos/buildroot-2017.02.3/output/target/usr/share/locale; do for langdir in $dir/*; do if [ -e "${langdir}" ]; then grep -qx "${langdir##*/}" /home/zengjf/zengjfos/buildroot-2017.02.3/output/build/locales.nopurge || rm -rf $langdir; fi done; done

    if [ -d /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/X11/locale ]; then for lang in C en_US; do if [ -f /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/X11/locale/$lang/XLC_LOCALE ]; then echo "$lang/XLC_LOCALE: $lang"; fi done > /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/X11/locale/locale.dir; fi

    rm -rf /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/include /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/aclocal \

        /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/lib/pkgconfig /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/pkgconfig \

        /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/lib/cmake /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/cmake

    find /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/{lib,share}/ -name '*.cmake' -print0 | xargs - rm -f

    find /home/zengjf/zengjfos/buildroot-2017.02./output/target/lib/ /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/lib/ /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/libexec/ \

        \( -name '*.a' -o -name '*.la' \) -print0 | xargs - rm -f

    rm -rf /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/gdb

    rm -rf /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/bash-completion

    rm -rf /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/zsh

    rm -rf /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/man /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/man

    rm -rf /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/info /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/info

    rm -rf /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/doc /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/doc

    rm -rf /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share/gtk-doc

    rmdir /home/zengjf/zengjfos/buildroot-2017.02./output/target/usr/share >/dev/null || true

    find /home/zengjf/zengjfos/buildroot-2017.02./output/target -type f \( -perm / -o -name '*.so*' \) -not \( -name 'libpthread*.so*' -o -name 'ld-*.so*' -o -name '*.ko' \) -print0 | xargs - /home/zengjf/zengjfos/buildroot-2017.02./output/host/usr/bin/arm-buildroot-linux-gnueabi-strip --remove-section=.comment --remove-section=.note >/dev/null || true

    find /home/zengjf/zengjfos/buildroot-2017.02./output/target/lib/ -type f -name 'libpthread*.so*' | \

        xargs -r /home/zengjf/zengjfos/buildroot-2017.02./output/host/usr/bin/arm-buildroot-linux-gnueabi-strip --remove-section=.comment --remove-section=.note --strip-debug

    find /home/zengjf/zengjfos/buildroot-2017.02./output/target/lib/ -type f -name 'ld-*.so*' | \

        xargs -r /home/zengjf/zengjfos/buildroot-2017.02./output/host/usr/bin/arm-buildroot-linux-gnueabi-strip --remove-section=.comment --remove-section=.note --strip-debug

    # 检查一些库的存在

    test -f /home/zengjf/zengjfos/buildroot-2017.02./output/target/etc/ld.so.conf && \

        { echo "ERROR: we shouldn't have a /etc/ld.so.conf file"; exit ; } || true

    test -d /home/zengjf/zengjfos/buildroot-2017.02./output/target/etc/ld.so.conf.d && \

        { echo "ERROR: we shouldn't have a /etc/ld.so.conf.d directory"; exit ; } || true

    mkdir -p /home/zengjf/zengjfos/buildroot-2017.02./output/target/etc

    ( \

        echo "NAME=Buildroot"; \

        echo "VERSION=2017.02.3"; \

        echo "ID=buildroot"; \

        echo "VERSION_ID=2017.02.3"; \

        echo "PRETTY_NAME=\"Buildroot 2017.02.3\"" \

    ) >  /home/zengjf/zengjfos/buildroot-2017.02./output/target/etc/os-release

    [7m>>>   Generating root filesystem image rootfs.tar[27m

    rm -f /home/zengjf/zengjfos/buildroot-2017.02./output/build/_fakeroot.fs

    rm -f /home/zengjf/zengjfos/buildroot-2017.02./output/target/THIS_IS_NOT_YOUR_ROOT_FILESYSTEM

    rm -f /home/zengjf/zengjfos/buildroot-2017.02./output/build/_users_table.txt

    echo '#!/bin/sh' > /home/zengjf/zengjfos/buildroot-2017.02./output/build/_fakeroot.fs

    echo "set -e" >> /home/zengjf/zengjfos/buildroot-2017.02./output/build/_fakeroot.fs

    echo "chown -h -R 0:0 /home/zengjf/zengjfos/buildroot-2017.02.3/output/target" >> /home/zengjf/zengjfos/buildroot-2017.02./output/build/_fakeroot.fs

    printf '       sshd -1 sshd -1 * - - - SSH drop priv user\n     ftp -1 ftp -1 * /home/ftp - - Anonymous FTP User\n\n' >> /home/zengjf/zengjfos/buildroot-2017.02./output/build/_users_table.txt

    PATH="/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/bin:/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/sbin:/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/bin:/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/sbin:/home/bin:/home/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/zengjf/zengjfos/buildroot-2016.08/output/host/opt/ext-toolchain/bin::/home/zengjf/zengjfos/AplexOS/git-repo:/home/linux/pycharm-community-2017.1.3/bin" /home/zengjf/zengjfos/buildroot-2017.02./support/scripts/mkusers /home/zengjf/zengjfos/buildroot-2017.02./output/build/_users_table.txt /home/zengjf/zengjfos/buildroot-2017.02./output/target >> /home/zengjf/zengjfos/buildroot-2017.02./output/build/_fakeroot.fs

    cat system/device_table.txt > /home/zengjf/zengjfos/buildroot-2017.02./output/build/_device_table.txt

    printf '       /bin/busybox                     f 4755 0  0 - - - - -\n /dev/console c 622 0 0 5 1 - - -\n\n' >> /home/zengjf/zengjfos/buildroot-2017.02./output/build/_device_table.txt

    echo "/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/bin/makedevs -d /home/zengjf/zengjfos/buildroot-2017.02.3/output/build/_device_table.txt /home/zengjf/zengjfos/buildroot-2017.02.3/output/target" >> /home/zengjf/zengjfos/buildroot-2017.02./output/build/_fakeroot.fs

    # 这里很重要，因为这里可以将target中的内容打包进入rootfs.tar中去

    printf '       (cd /home/zengjf/zengjfos/buildroot-2017.02.3/output/target; find -print0 | LC_ALL=C sort -z | tar  -cf /home/zengjf/zengjfos/buildroot-2017.02.3/output/images/rootfs.tar --null --no-recursion -T - --numeric-owner)\n' >> /home/zengjf/zengjfos/buildroot-2017.02./output/build/_fakeroot.fs

    # 给_fakeroot.fs加执行权限

    chmod a+x /home/zengjf/zengjfos/buildroot-2017.02./output/build/_fakeroot.fs

    # 用fakeroot执行_fakeroot.fs

    PATH="/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/bin:/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/sbin:/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/bin:/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/sbin:/home/bin:/home/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/zengjf/zengjfos/buildroot-2016.08/output/host/opt/ext-toolchain/bin::/home/zengjf/zengjfos/AplexOS/git-repo:/home/linux/pycharm-community-2017.1.3/bin" /home/zengjf/zengjfos/buildroot-2017.02./output/host/usr/bin/fakeroot -- /home/zengjf/zengjfos/buildroot-2017.02./output/build/_fakeroot.fs

    rootdir=/home/zengjf/zengjfos/buildroot-2017.02./output/target

    table='/home/zengjf/zengjfos/buildroot-2017.02.3/output/build/_device_table.txt'

    # 相当于拷贝，同时可以设定权限

    /usr/bin/install -m  support/misc/target-dir-warning.txt /home/zengjf/zengjfos/buildroot-2017.02./output/target/THIS_IS_NOT_YOUR_ROOT_FILESYSTEM

    # 使用bzip2进行压缩

    PATH="/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/bin:/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/sbin:/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/bin:/home/zengjf/zengjfos/buildroot-2017.02.3/output/host/usr/sbin:/home/bin:/home/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/zengjf/zengjfos/buildroot-2016.08/output/host/opt/ext-toolchain/bin::/home/zengjf/zengjfos/AplexOS/git-repo:/home/linux/pycharm-community-2017.1.3/bin" bzip2 - -c /home/zengjf/zengjfos/buildroot-2017.02./output/images/rootfs.tar > /home/zengjf/zengjfos/buildroot-2017.02./output/images/rootfs.tar.bz2

二、fakeroot使用：

    . 参考命令：fakeroot -- /home/zengjf/zengjfos/buildroot-2017.02./output/build/_fakeroot.fs

    . cd <your path> && fakeroot -- tar jcvf rootfs.tar.bz2 *

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