x210项目重新回顾之八制作nfs根文件系统

1.)制作简易根文件系统/tftpboot/nfs

>mkdir -p bin dev  etc  lib  mnt  proc  sbin  sys  tmp  usr/bin  var  usr/lib

>mknod -m 600 /dev/console c 5 1

>mknod -m 666 /dev/null c 1 3

2.)编译busybox-1.24.0

目录：/home/jimmy/news5pv210/busybox-1.24.0

>make menuconfig ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi-

Busybox Settings--->
    Build Options--->
        [*]Build BusyBox as a static binary(no shared libs)
Busybox Library Tuning--->
    [*]vi-style line editing commands
    [*]Fancy shell prompts
Linux Module Utilities--->
    [ ]Simplified modutils
    [*]insmod
    [*]rmmod
    [*]lsmod
    [*]modprobe
    [*]depmod
Linux System Utilities--->[*]mdev
    [*]Support /etc/mdev.conf
    [*]Support subdirs/symlinks
    [*]Support regular expressions substitutions when renaming dev
    [*]Support command execution at device addition/removal
    [*]Support loading of firmwares

>make 

>make install (我的安装在nfs根目录下 /tftpboot/nfs)

3.)编写/etc/inittab文件：

::sysinit:/etc/init.d/rcS
::askfirst:-/bin/sh
::ctrlaltdel:-/bin/reboot
::shutdown:/bin/umount -a -r
::restart:sbin/init

4）编写/etc/init.d/rcS文件，这里我改写为调用/etc/init.d/S*所有S开头的文件，最后调用mount -a  挂载fstab里的文件系统

#!/bin/sh
# Start all init scripts in /etc/init.d
# executing them in numerical order.
#
for i in /etc/init.d/S??* ;do                   

     # Ignore dangling symlinks (if any).
     [ ! -f "$i" ] && continue

     case "$i" in
        *.sh)
            # Source shell script for speed.
            (
                trap - INT QUIT TSTP
                set start
                . $i
            )
            ;;
        *)
            # No sh extension, so fork subprocess.
            $i start
            ;;
    esac
done
mount -a  

5.)/etc/fstab, 其中/proc和/sys最重要，因为里面有驱动要用的结构

# /etc/fstab: static file system information.
#              
/dev/root       /              ext2     rw,noauto         0      1
proc            /proc          proc     defaults          0      0
devpts          /dev/pts       devpts   defaults,gid=5,mode=620   0      0
tmpfs           /dev/shm       tmpfs    mode=0777         0      0
tmpfs           /tmp           tmpfs    defaults          0      0
sysfs           /sys           sysfs    defaults          0      0

6）/etc/init.d/S10mdev 启动mdev

#!/bin/sh
#
# Start mdev....
#

case "$1" in
  start)
        echo "Starting mdev..."
        /sbin/mdev -s
        ;;
  stop)
        ;;
  restart|reload)
        ;;
  *)
        echo "Usage: $0 {start|stop|restart}"
        exit 1
esac

exit $?