LS-GL：debian：linuxrc の削減

基本的には9/13の手順をセルフで実行する

initrd.buffalo の展開

initrd の取り出し

ude:~# cd /boot
ude:/boot# dd if=initrd.buffalo of=initrd.gz bs=64 skip=1
68981+1 records in
68981+1 records out
4414847 bytes transferred in 3.343434 seconds (1320453 bytes/sec)
ude:/boot# gunzip initrd.gz
ude:/boot#

initrd のマウント

ude:/boot# mkdir /tmp/root
ude:/boot# mount -o loop initrd /tmp/root
ude:/boot# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda2              1976524    264124   1611996  15% /
tmpfs                    63100         0     63100   0% /dev/shm
/dev/sda1               194443     83036    101368  46% /boot
/dev/sda4             14176032     32828  13423092   1% /mnt
/boot/initrd             13303     10722      2581  81% /tmp/root
ude:/boot#

linuxrc の修正

ude:/boot# cd /tmp/root
ude:/tmp/root# ls
bin  etc  linuxrc       lost+found  proc  rootfs  tmp  var
dev  lib  linuxrc.orig  mnt         root  sbin    usr
ude:/tmp/root# rm linuxrc.orig
ude:/tmp/root# mv linuxrc linuxrc.orig
ude:/tmp/root# cp linuxrc.orig linuxrc
ude:/tmp/root# vi linuxrc
	:
	:
ude:/tmp/root# diff -c linuxrc.orig linuxrc
*** linuxrc.orig        Thu Sep 14 18:32:36 2006
--- linuxrc     Tue Sep 26 01:01:17 2006
***************
*** 2,16 ****

  export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin

! echo "---- in midified linuxrc ---"

- mount proc /proc -t proc
-
- # set the system time from the hardware clock
- hwclock -s
- date
-
- umount /proc
  umount -a
  exit 0

--- 2,9 ----

  export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin

! echo "---- in modified linuxrc ---"

  umount -a
  exit 0

ude:/tmp/root#

initrd.buffalo 作成

initrd のアンマウント

ude:/tmp/root# cd /
ude:/# umount /tmp/root
ude:/# 

initrd.buffalo の作成

ude:/# cd /boot
ude:/boot# gzip initrd
ude:/boot# mv initrd.buffalo initrd.buffalo.orig
ude:/boot# /usr/local/src/u-boot/u-boot-1.1.4/tools/mkimage -A ARM -O Linux -T ramdisk -C gzip -a 0x00000000 -e 0x00000000 -n initrd -d initrd.gz initrd.buffalo
Created:      Tue Sep 26 01:05:21 2006
Image Type:   ARM Linux RAMDisk Image (gzip compressed)
Data Size:    4414820 Bytes = 4311.35 kB = 4.21 MB
Load Address: 0x00000000
Entry Point:  0x00000000
ude:/boot#

新 initrd.buffalo からブート

	:
	:
## Booting image at 00100000 ...
   Image Name:   Linux-2.6.12.6-arm1
   Created:      2006-08-08   8:16:10 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    1790696 Bytes =  1.7 MB
   Load Address: 00008000
   Entry Point:  00008000
   Verifying Checksum ... OK
OK
## Loading Ramdisk Image at 00800000 ...
   Image Name:   initrd
   Created:      2006-09-25  16:05:21 UTC
   Image Type:   ARM Linux RAMDisk Image (gzip compressed)
   Data Size:    4414820 Bytes =  4.2 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK

Starting kernel ...
	:
	:
RAMDISK: Compressed image found at block 0
VFS: Mounted root (ext2 filesystem).
---- in modified linuxrc ---
kjournald starting.  Commit interval 5 seconds
EXT3 FS on sda2, internal journal
	:
	:
Debian GNU/Linux 3.1 ude ttyS0

ude login:

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