Buildroot 打包文件系统流程跟踪
/*********************************************************************************
* 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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