LFS中的几个疑惑

heuyck

6.2中建立了
##########6.2. Preparing Virtual Kernel File Systems##########
mkdir -pv $LFS/{dev,proc,sys}
##########6.2.1. Creating Initial Device Nodes##########
mknod -m 600 $LFS/dev/console c 5 1
mknod -m 666 $LFS/dev/null c 1 3
##########6.2.2. Mounting and Populating /dev##########
mount -v --bind /dev $LFS/dev
##########6.2.3. Mounting Virtual Kernel File Systems##########
mount -vt devpts devpts $LFS/dev/pts
mount -vt tmpfs shm $LFS/dev/shm
mount -vt proc proc $LFS/proc
mount -vt sysfs sysfs $LFS/sys


然后chroot到$LFS里 再执行了 6.5-6.6
##########6.5. Creating Directories##########
mkdir -pv /{bin,boot,etc/opt,home,lib,mnt,opt}
mkdir -pv /{media/{floppy,cdrom},sbin,srv,var}
install -dv -m 0750 /root
install -dv -m 1777 /tmp /var/tmp
mkdir -pv /usr/{,local/}{bin,include,lib,sbin,src}
mkdir -pv /usr/{,local/}share/{doc,info,locale,man}
mkdir -v /usr/{,local/}share/{misc,terminfo,zoneinfo}
mkdir -pv /usr/{,local/}share/man/man{1..8}
for dir in /usr /usr/local; do
ln -sv share/{man,doc,info} $dir
done
mkdir -v /var/{lock,log,mail,run,spool}
mkdir -pv /var/{opt,cache,lib/{misc,locate},local}
##########6.6. Creating Essential Files and Symlinks##########
ln -sv /tools/bin/{bash,cat,echo,grep,pwd,stty} /bin
ln -sv /tools/bin/perl /usr/bin
ln -sv /tools/lib/libgcc_s.so{,.1} /usr/lib
ln -sv /tools/lib/libstdc++.so{,.6} /usr/lib
ln -sv bash /bin/sh

touch /etc/mtab

cat > /etc/passwd << "EOF"
root:x:0:0:root:/root:/bin/bash
nobody:x:99:99:Unprivileged User:/dev/null:/bin/false
EOF

cat > /etc/group << "EOF"
root:x:0:
bin:x:1:
sys:x:2:
kmem:x:3:
tty:x:4:
tape:x:5:
daemon:x:6:
floppy:x:7:
disk:x:8:
lp:x:9:
uucp:x:10:
audio:x:11:
video:x:12:
utmp:x:13:
usb:x:14:
cdrom:x:15:
mail:x:34:
nogroup:x:99:
EOF

exec /tools/bin/bash --login +h

touch /var/run/utmp /var/log/{btmp,lastlog,wtmp}
chgrp -v utmp /var/run/utmp /var/log/lastlog
chmod -v 664 /var/run/utmp /var/log/lastlog


为什么不在宿主系统里把6.2-6.6全建立完了再chroot
也省得因为出现了I have no name!
需要再执行exec /tools/bin/bash --login +h
至少在最后面的chgrp之前就可以把6.2-6.6的大部分工作做完了啊