#!/bin/sh
#
# Creating an /boot/initrd-custom.gz
# -----------------------------------
#
# Original Script
# ----------------
#	http://Linux-Boot.net/InitRD/Scripts/initrd-howto.sh
# 
# 
# Other URLs
# ----------
#	http://Linux-Boot.net/InitRD/HOWTO
#	http://www.tLDP.org/HOWTO/Kernel-HOWTO-11.html
#	http://www.opennet.ru/docs/HOWTO/Kernel-HOWTO-11.html
#
#
# 21-Jan-05 amo Date-of-Birth
#
#
#
# mkinitrd Method:
# ---------------
#	#	< initrd.img >			< kernel >
#	mkinitrd /boot/initrd-2.4.29.img	 2.4.29
#
#
#
# ========================================
# Directory Tree for the initrd
# ========================================
#
mkdir /tmp/initrd
#
cd /tmp
#
#
KERNEL=`uname -r`
#
#
# a little clearer for initrd's temporary directories tree
#
mkdir    initrd/bin
mkdir    initrd/etc
mkdir -p initrd/lib/modules
mkdir    initrd/dev
mkdir    initrd/loopfs
#
#
# sash is standalone shell
# bash is bigger and needs additional libraries
#
cp -dapr /bin/*mod* /bin/sash	initrd/bin
cp -dpar /dev/console /dev/null	initrd/dev
cp -dapr /dev/ram /dev/ram?	initrd/dev
#
cp -dpar /dev/systty	 	initrd/dev
cp -dpar /dev/tty?		initrd/dev
#
# 
#
# Fill the initrd with the desired modules
# ========================================
#	#
#	# the required modules you specify are loaded by initrd/linuxrc	
#	#
cp -dpar /lib/modules/$KERNEL/scsi/aic7xxx.o	initrd/lib
#
# # the entire modules tree for the kernel
# cp -dpar /lib/modules/$KERNEL			initrd/lib/modules
#
#
# =====================
# Create the /linurc
# =====================
#
cat initrd/linuxrc <<LINUXRC
#!/bin/sash
#
# /linuxrc 
#
aliasall
#
echo "Loading aic7xxx module"
insmod /lib/aic7xxx.o
#
# End of /linuxrc file
LINUXRC
#
#
# chmod 755 initrd/linuxrc
touch initrd/linuxrc
#
#
# Test the /linuxrc file
# ----------------------
#	chroot /tmp/initrd /bin/sash
#	/linuxrc
#
#	# to return from chroot
# 	exit
#
#
# ==============================
# Create the initrd-custom.gz
# ==============================
#
# Now Create the ramdisk ( size is limited by the kernel )
#
# or  Create the loopdisk ( any arbitrary size )
#
dd if=/dev/zero of=/tmp/initloop count=2500 bs=1024
losetup /dev/loop0 /tmp/initloop
mke2fs /dev/loop0
mkdir /mnt/loop
mount /dev/loop0 /mnt/loop
cp -a initrd/* /mnt/loop
umount /mnt/loop
losetup -d /dev/loop0
#
#
gzip -c /tmp/initloop > /boot/initrd-2.4.29.custom.gz
#
#
# =================================================================
# Now Fix LILO to use the new initrd and install the custom initrd
# =================================================================
#
# root# vi /etc/lilo.conf
#	#
#	boot=/dev/sda
#	#
#	prompt
#	timeout = 50
#	# compact
#	# 
#	# vga = extended
#	#
#	lba32
#	read-only
#	#
#	image = /boot/vmlinuz-2.4.29
#	    initrd = /boot/initrd-2.4.29.custom.gz
#	    label = Linux-2.4.29
#	    root = /dev/sda1
#	#
#
# root# lilo
#
# End of file