27-init-chroot.sh

#!/bin/bash
# QQ群：111601117、钉钉群：35948877

# 避免chroot后执行
id lfs >/dev/null 2>&1
if [ $? = 0 ]; then
    source `dirname ${BASH_SOURCE[0]}`/lfs.sh

    # 创建挂载目录
    mkdir -pv $LFS/{dev,proc,sys,run}

    # 清理lfs用户配置
    find /home/lfs/ -user lfs -type f -name '*' | xargs rm -vf

    # 备份
    if [ ! -f $LFS/sources/lfs.tar.gz ]; then
        pushd $LFS
            tar --exclude=proc --exclude=sys --exclude=dev --exclude=run --exclude=boot \
                --exclude=home --exclude=sources --one-file-system \
                -capvf $LFS/sources/lfs.tar.gz --directory=$LFS *
        popd
    fi

    # 恢复文件所有者为root老大
    chown -R root:root $LFS/{usr,lib,var,etc,bin,sbin,tools}
    case $(uname -m) in
        x86_64) chown -R root:root $LFS/lib64 ;;
    esac

    # 准备chroot
    cp -v ${BASH_SOURCE[0]} $LFS/task.sh
    source `dirname ${BASH_SOURCE[0]}`/chroot.sh
    rm -fv $LFS/task.sh
    exit
fi


#
# 以下内容chroot之后才执行
#

[ -f /_INIT_CHROOT_DONE ] && exit

# 创建目录
mkdir -pv /{boot,home,mnt,opt,srv}

mkdir -pv /etc/{opt,sysconfig}
mkdir -pv /lib/firmware
mkdir -pv /media/{floppy,cdrom}
mkdir -pv /usr/{,local/}{include,src}
mkdir -pv /usr/local/{bin,lib,sbin}
mkdir -pv /usr/{,local/}share/{color,dict,doc,info,locale,man}
mkdir -pv /usr/{,local/}share/{misc,terminfo,zoneinfo}
mkdir -pv /usr/{,local/}share/man/man{1..8}
mkdir -pv /var/{cache,local,log,mail,opt,spool}
mkdir -pv /var/lib/{color,misc,locate}

ln -sfv /run /var/run
ln -sfv /run/lock /var/lock

install -dv -m 0750 /root
install -dv -m 1777 /tmp /var/tmp

# 创建必要的文件和符号链接
ln -sv /proc/self/mounts /etc/mtab

cat > /etc/hosts << EOF
127.0.0.1  localhost $(hostname)
::1        localhost
EOF

cat > /etc/passwd << "EOF"
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/dev/null:/usr/bin/false
daemon:x:6:6:Daemon User:/dev/null:/usr/bin/false
messagebus:x:18:18:D-Bus Message Daemon User:/run/dbus:/usr/bin/false
systemd-journal-gateway:x:73:73:systemd Journal Gateway:/:/usr/bin/false
systemd-journal-remote:x:74:74:systemd Journal Remote:/:/usr/bin/false
systemd-journal-upload:x:75:75:systemd Journal Upload:/:/usr/bin/false
systemd-network:x:76:76:systemd Network Management:/:/usr/bin/false
systemd-resolve:x:77:77:systemd Resolver:/:/usr/bin/false
systemd-timesync:x:78:78:systemd Time Synchronization:/:/usr/bin/false
systemd-coredump:x:79:79:systemd Core Dumper:/:/usr/bin/false
uuidd:x:80:80:UUID Generation Daemon User:/dev/null:/usr/bin/false
systemd-oom:x:81:81:systemd Out Of Memory Daemon:/:/usr/bin/false
nobody:x:65534:65534:Unprivileged User:/dev/null:/usr/bin/false
EOF

cat > /etc/group << "EOF"
root:x:0:
bin:x:1:daemon
sys:x:2:
kmem:x:3:
tape:x:4:
tty:x:5:
daemon:x:6:
floppy:x:7:
disk:x:8:
lp:x:9:
dialout:x:10:
audio:x:11:
video:x:12:
utmp:x:13:
usb:x:14:
cdrom:x:15:
adm:x:16:
messagebus:x:18:
systemd-journal:x:23:
input:x:24:
mail:x:34:
kvm:x:61:
systemd-journal-gateway:x:73:
systemd-journal-remote:x:74:
systemd-journal-upload:x:75:
systemd-network:x:76:
systemd-resolve:x:77:
systemd-timesync:x:78:
systemd-coredump:x:79:
uuidd:x:80:
systemd-oom:x:81:
wheel:x:97:
users:x:999:
nogroup:x:65534:
EOF

# 创建测试用户
echo "tester:x:101:101::/home/tester:/bin/bash" >> /etc/passwd
echo "tester:x:101:" >> /etc/group
install -o tester -d /home/tester

# 移除 “I have no name!” 提示符
echo exit | exec /usr/bin/bash --login

# 初始化日志文件
touch /var/log/{btmp,lastlog,faillog,wtmp}
chgrp -v utmp /var/log/lastlog
chmod -v 664  /var/log/lastlog
chmod -v 600  /var/log/btmp

# 查看配置效果
ls -lh
env

# 设置初始化标记
touch /_INIT_CHROOT_DONE