Compile the busybox File System

[Original] compile the busybox File System

 

I. Environment
Ubuntu 8.04
Arm-Linux-GCC 3.4.5
Busybox-1.1.3

Ii. busybox File System
1. Download busybox1.1.3 (http://www.busybox.net/) and unzip it.
2. Go to the decompressed directory and configure busybox

# Make menuconfig

Busybox Settings>

General configuration>
[*] Support for devfs

Init utilities>
[*] Init
[*] Support reading an inittab file/* supports init to read the/etc/inittab configuration file, which must be selected */
[*] Be _ extra _ quiet on boot
[*] Support running init from within an initrd (not initramfs)
[*] Poweroff, halt, and reboot
[*] Mesg

Shells>

Choose your default shell (Ash)>
/* (X) ash select ash to generate the bin/sh file only when it is generated.
* Let's look at the first line of the linuxrc script:
*#! /Bin/sh is interpreted and executed by bin/sh.
*/(Because I didn't select it here, the startup will fail)
[*] Ash

Add history records, auto-completion, and delete characters:
Shells --->
--- Bourne shell options
[] Hide message on Interactive Shell startup
[] Standalone Shell
[*] Command line editing
[*] Vi-style line editing commands
(15) History Size
[*] History saving
[*] Tab completion
[*] Username completion
[] Fancy shell prompts

Coreutils>
[*] CP
[*] Cat
[*] Ls
[*] Mkdir
[*] Echo (Basic susv3 version taking no options)
[*] Env
[*] Mv
[*] Pwd
[*] RM
[*] Touch

Editors>
[*] Vi

Linux system utilities>
[*] Mount
[*] Umount
[*] Support loopback mounts
[*] Support for the old/etc/mtab File

LINUX module utilities --->
[*] Insmod
[*] Rmmod
[*] Lsmod
[*] Lsmod pretty output for 2.6.x linux kernels
[*] Modprobe
[*] Multiple options Parsing
--- Options common to multiple modutils
[*] Support tainted module checking with new kernels
[] Support version 2.2.x to 2.4.x linux kernels // do not select this option !!!
[*] Support version 2.6.x linux kernels

Networking utilities>
[*] Ifconfig
[*] Ping

Archival utilities --->
[*] Tar
[*] Enable archive creation (new)
[*] Enable-J option to handle .tar.bz2 files

Note: You can select commands as needed.

3, if the file system runs on 2410, do not need to modify the source code, if running on 2440, need to busybox-1.1.3/init. c In
Two places
Close (0 );
Close (1 );
Close (2 );
Comment out:
/* Clean up */
// Close (0 );
// Close (1 );
// Close (2 );

/* Close whatever files are open, and reset the console .*/
// Close (0 );
// Close (1 );
// Close (2 );
4. Compile and install busybox. (arch and cross content is not set in makefile 1.1.3. You need to write them in the command. I did this)

# Export Path = $ path: usr/crosstool/gcc-3.4.5-glibc-2.3.6/ARM-Linux/bin
# Make target_arch = arm cross = "arm-Linux -"
# Make install

5. Create a root file system structure
# Cd ~
# Mkdir rootfs
# Cd rootfs
# Mkdir bin Dev etc lib proc sbin tmp usr var mnt
# Chmod 1777 TMP
# Mkdir usr/bin usr/lib usr/sbin
# Mkdir var/lib var/lock var/log var/run var/tmp
# Mkdir etc/init. d
# Chmod 1777 var/tmp
Copy all files in the busybox1.1.3/_ install/directory to overwrite the empty folder in the rootfs folder.

In Lib, some library files need to be merged. below, only some common libraries are provided.
# Cd rootfs/lib
# Cp-RfD/usr/crosstool/gcc-3.4.5-glibc-2.3.6/ARM-Linux/lib/LD *./
# Cp-RfD/usr/crosstool/gcc-3.4.5-glibc-2.3.6/ARM-Linux/lib/libc-2.3.6.so ./
# Cp-RfD/usr/crosstool/gcc-3.4.5-glibc-2.3.6/ARM-Linux/lib/libc. so.6 ./
# Cp-RfD/usr/crosstool/gcc-3.4.5-glibc-2.3.6/ARM-Linux/lib/libm *./
# Cp-RfD/usr/crosstool/gcc-3.4.5-glibc-2.3.6/ARM-Linux/lib/libcrypt *./
Of course, you can put all the cross-compiled libraries in for convenience, but this will increase the volume of the file system.
# Cp-RfD/usr/crosstool/gcc-3.4.5-glibc-2.3.6/ARM-Linux/lib/*./(note-D to keep the link between library files)

6. Create etc/init. d/RCS
#! /Bin/sh
Echo "running/etc/init. d/RCS"
Echo "mount the/proc file system"
/Bin/Mount-T proc/proc

Echo "Mount tmpfs filesystem to/tmp"
/Bin/Mount-T tmpfs NONE/tmp

Echo "Mount ramfs filesystem to/Var"
/Bin/Mount-T ramfs NONE/var

Then modify the permission: chmod 775 RCS

7. Create ETC/inittab
# This is run first packet t when booting
Console: sysinit:/etc/init. d/RCS
# Start an "askfirst" shell on the console
#: Askfirst:-/bin/bash
Console: askfirst:-/bin/sh
# Stuff to do when restarting the INIT process
: Restart:/sbin/init
# Stuff to do before rebooting
: Ctrlaltdel:/sbin/reboot
: Shutdown:/bin/umount-a-r
Note: All the kernel source code Drivers/Char/tty_io.c must be
Change noctty = 1 to noctty = 0

8. Create etc/fstab again.
None/proc defaults 0 0
None/dev/PTS devpts mode = "0622" 0 0
Tmpfs/dev/SHM tmpfs defaults 0 0

At this point, the root file system has been created.