buildrootfilesystem.txt

这是《嵌入式linux－硬件、软件与接口》一书对应的所有linux方面实例的源代码

#!/bin/bash
# buildrootfilesystem v0.2 10/23/01
# www.embeddedlinuxinterfacing.com
#
# The original location of this script is
# http://www.embeddedlinuxinterfacing.com/chapters/04/buildrootfilesystem
#
# Copyright (C) 2001 by Craig Hollabaugh
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU Library General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your option) any
# later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more
# details.
#
# You should have received a copy of the GNU Library General Public License
# along with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#

umask 022

SRCFILELOC=/root/cross
BUILDLOC=$SRCFILELOC/builds

case "$1" in
"ppc" )
ARCH=powerpc
TARGET=powerpc-linux
#MVRPMLOC=ftp://ftp.mvista.com/pub/Journeyman/cd2/ppc_8xx/apps/
MVRPMLOC=http://www.embeddedlinuxinterfacing.com/ftp.mvista.com/pub/Journeyman/cd2/ppc_8xx/apps/
TEMPFSLOC=$BUILDLOC/$ARCH-rootrpms/opt/hardhat/devkit/ppc/8xx/target/
;;
"arm" )
ARCH=arm
TARGET=arm-linux
#MVRPMLOC=ftp://ftp.mvista.com/pub/Journeyman/cd1/arm_sa_le/apps/
MVRPMLOC=http://www.embeddedlinuxinterfacing.com/ftp.mvista.com/pub/Journeyman/cd1/arm_sa_le/apps/
TEMPFSLOC=$BUILDLOC/$ARCH-rootrpms/opt/hardhat/devkit/arm/sa_le/target/
;;
"i386" )
ARCH=i386
TARGET=i386
#MVRPMLOC=ftp://ftp.mvista.com/pub/Journeyman/cd1/x86_586/apps/
MVRPMLOC=http://www.embeddedlinuxinterfacing.com/ftp.mvista.com/pub/Journeyman/cd1/x86_586/apps/
TEMPFSLOC=$BUILDLOC/$ARCH-rootrpms/opt/hardhat/devkit/x86/586/target/
;;
* )
	echo -n "Usage " `basename $0`
	echo " i386|arm|ppc [ramdisk]"
	exit 1
;;
esac

#
# Step 1 - Determine what packages to download
#
echo Step 1 - Determine what packages to download

PACKAGES="glibc-2 bash procps textutils fileutils shellutils sysvinit netbase libncurses libstdc mount telnet-client net-tools ping gdbserver modutils"

echo packages are $PACKAGES
echo Step 1 - Complete
echo

#
# Step 2 - Create build and new target root filesystem directories
#
echo Step 2 - Create build and new target root filesystem directories

if [ ! -e /tftpboot ]
then
	mkdir /tftpboot 
fi

if [ ! -e $SRCFILELOC ]
then
	mkdir $SRCFILELOC 
fi

if [ ! -e $BUILDLOC ]
then
	mkdir $BUILDLOC 
fi

ROOTFSLOC=/tftpboot/$ARCH-rootfs

echo Creating root file system for $ARCH


rm -rf $ROOTFSLOC
mkdir  $ROOTFSLOC

if [ ! -e $BUILDLOC/$ARCH-rootrpms ]
then
	mkdir  $BUILDLOC/$ARCH-rootrpms
fi

cd $ROOTFSLOC
mkdir       dev etc etc/init.d bin sbin lib usr usr/bin proc tmp   
chmod 755 . dev etc etc/init.d bin sbin lib usr usr/bin proc tmp

echo Step 2 - Complete
echo

#
# Step 3 - Download the packages
#
echo Step 3 - Download the packages

cd $BUILDLOC/$ARCH-rootrpms

lynx -dump $MVRPMLOC | grep ftp > /tmp/rpmlist
for i in $PACKAGES
do
	a=`grep $i /tmp/rpmlist`
	rpmurl=`echo $a | cut -d " " -f 2`
#	echo $rpmurl
	rpm=`basename $rpmurl`
#	echo $rpm

	if [ ! -f $BUILDLOC/$ARCH-rootrpms/$rpm ]
	then
		echo Getting $rpm
		wget $rpmurl
	else
		echo Have $rpm
	fi

done

echo Step 3 - Complete
echo

#
# Step 4 - Extract the package's contents into a temporary directory
#
echo Step 4 - Extract the package\'s contents into a temporary directory
cd $BUILDLOC/$ARCH-rootrpms

# this is the old way, too slow because it converts rpms everytime
#alien -t *rpm
#find . -name "*tgz" -exec tar zxvf {} \;
#rm -rf *tgz


IFS='
'

for rpm in `ls *rpm`
do
	if [ ! -f $rpm.extracted ]
	then
		alien -t $rpm
		tgz=`ls *tgz`
		tar zxvf $tgz
		rm -rf $tgz
		touch $rpm.extracted
	fi
done


echo Step 4 - Complete
echo

#
# Step 5 - Copy the required programs
#
echo Step 5 - Copy the required programs
echo


#lib files
cd $TEMPFSLOC/lib
cp -av ld*                         $ROOTFSLOC/lib
cp -av libc-*                      $ROOTFSLOC/lib
cp -av libc.*                      $ROOTFSLOC/lib
cp -av libutil*                    $ROOTFSLOC/lib
cp -av libncurses*                 $ROOTFSLOC/lib
cp -av libdl*                      $ROOTFSLOC/lib
cp -av libnss_dns*                 $ROOTFSLOC/lib
cp -av libnss_files*               $ROOTFSLOC/lib
cp -av libresolv*                  $ROOTFSLOC/lib
cp -av libproc*                    $ROOTFSLOC/lib
cp -av librt*                      $ROOTFSLOC/lib
cp -av libpthread*                 $ROOTFSLOC/lib


#libm and libstdc are needed by telnet-client
cp -av libm*                       $ROOTFSLOC/lib

cd $ROOTFSLOC/usr
ln -s ../lib lib

cd $TEMPFSLOC/usr/lib
cp -av libstdc*                    $ROOTFSLOC/usr/lib

#sbin files
cd $TEMPFSLOC/sbin
cp -av init ifconfig route *mod    $ROOTFSLOC/sbin

#bin files
cd $TEMPFSLOC/bin
cp -av bash cat ls mount umount ps $ROOTFSLOC/bin
cp -av df kill ping chmod touch rm $ROOTFSLOC/bin
cp -av echo                        $ROOTFSLOC/bin

cd $ROOTFSLOC/bin
ln -s bash sh

#usr/bin files
cd $TEMPFSLOC/usr/bin
cp -av telnet gdbserver         $ROOTFSLOC/usr/bin

#helloworld
cd $ROOTFSLOC/tmp

cat > helloworld.c << ENDOFINPUT
#include <stdio.h>

int main(void)
{
	int i;

	for (i = 1; i < 10; i++)
	{
		printf("Hello world %d times!\n",i);
	}
}

ENDOFINPUT

if [ $ARCH == "i386" ]
then
	gcc -g -o helloworld-$TARGET helloworld.c
else
	$TARGET-gcc -g -o helloworld-$TARGET helloworld.c
fi
file helloworld-$TARGET


chown -R root.root $ROOTFSLOC/*


echo Step 5 - Complete
echo

#
# Step 6 - Strip the required programs
#
echo Step 6 - Strip the required programs
echo

# strip it, strip it good
if [ $ARCH == "i386" ]
then
	strip -s -g $ROOTFSLOC/lib/*
	strip -s -g $ROOTFSLOC/bin/*
	strip -s -g $ROOTFSLOC/sbin/*
	strip -s -g $ROOTFSLOC/usr/bin/*
	strip -s -g $ROOTFSLOC/usr/lib/*
else
	$TARGET-strip -s -g $ROOTFSLOC/lib/*
	$TARGET-strip -s -g $ROOTFSLOC/bin/*
	$TARGET-strip -s -g $ROOTFSLOC/sbin/*
	$TARGET-strip -s -g $ROOTFSLOC/usr/bin/*
	$TARGET-strip -s -g $ROOTFSLOC/usr/lib/*
fi


echo Step 6 - Complete
echo

#
# Step 7 - Create configuration files
#
echo Step 7 - Create configuration files
echo

#etc files
cd $TEMPFSLOC/etc
cp -av protocols services                 $ROOTFSLOC/etc

cd $ROOTFSLOC/etc
cat > fstab << endofinput
# <file system>      <mount point>   <type>  <options> <dump>  <pass>
proc                 /proc           proc     defaults  0       0
endofinput

if [ $# == 2 ] && [ $2 == "ramdisk" ]
then
  echo "/dev/ram             /               ext2     defaults  0       0" >> fstab
else
  echo "192.168.1.11:/tftpboot/$ARCH-rootfs /  nfs      defaults  1       1" >> fstab
fi


cat > inittab << endofinput
id:2:initdefault:
l2:2:wait:/etc/init.d/rcS
1:2:respawn:/bin/bash
2:6:wait:/etc/init.d/umountfs
endofinput


cat > init.d/rcS << endofinput
#!/bin/bash
/bin/mount -n -o remount,rw /

# clear out mtab
>/etc/mtab

/bin/mount -a
echo Starting Network

/sbin/ifconfig lo 127.0.0.1 netmask 255.0.0.0 broadcast 127.255.255.255
/sbin/route add -net 127.0.0.0 netmask 255.0.0.0 lo
endofinput


case "$ARCH" in
"powerpc" )
cat >> init.d/rcS << endofinput
/sbin/ifconfig eth0 192.168.1.22 netmask 255.255.255.0
/sbin/route add default gw 192.168.1.254 eth0
endofinput
;;
"arm" )
cat >> init.d/rcS << endofinput
/sbin/ifconfig eth0 192.168.1.21 netmask 255.255.255.0
/sbin/route add default gw 192.168.1.254 eth0
endofinput
;;
"i386" )
cat >> init.d/rcS << endofinput
/sbin/ifconfig eth0 192.168.1.23 netmask 255.255.255.0
/sbin/route add default gw 192.168.1.254 eth0
endofinput
;;
esac

chmod 755 init.d/rcS

cat > init.d/umountfs << endofinput
/bin/echo umounting filesystems and remounting / as readonly
/bin/umount -f -a -r
/bin/mount -n -o remount,ro /
endofinput

chmod 755 init.d/umountfs

cat > resolv.conf << endofinput
domain trailblazerdev
nameserver 192.168.1.1
endofinput

echo Step 7 - Complete
echo

#
# Step 8 - Create devices in /dev directory
#
echo Step 8 - Create devices in /dev directory

#dev files
cd $ROOTFSLOC/dev
mknod -m 0666 tty c 5 0
mknod -m 0666 tty0 c 4 0
mknod -m 0666 ttyS0 c 4 64
ln -s ttyS0 console
mknod -m 0666 null c 1 3
mknod -m 660 ram b 1 1 
chown root.disk ram 

echo Step 8 - Complete
echo

#
# Step 9 - Prepare the root filesystem for operation on the target board
#
echo Step 9 - Prepare the root filesystem for operation on the target board


if [ $# == 2 ]
then
	if [ $2 == "ramdisk" ]
	then	
		echo Building $ARCH root filesystem ramdisk
		rm -rf /tmp/tmpmnt
		mkdir /tmp/tmpmnt
		rm -rf /tmp/ramrootfs
		dd if=/dev/zero of=/tmp/ramrootfs bs=1k count=8192
		mke2fs -F -m 0 -i 2000 /tmp/ramrootfs
		mount -o loop -t ext2 /tmp/ramrootfs /tmp/tmpmnt
		cd /tmp/tmpmnt
		cp -av $ROOTFSLOC/* .
		cd /tmp
		umount /tmp/tmpmnt
		cat /tmp/ramrootfs | gzip -9 > /tftpboot/$ARCH-ramdisk.gz

		if [ $ARCH == "powerpc" ]
		then
			cp /tftpboot/$ARCH-ramdisk.gz /usr/src/$TARGET/arch/ppc/boot/images/ramdisk.image.gz
			echo Copying /tftpboot/$ARCH-ramdisk.gz to /usr/src/$TARGET/arch/ppc/boot/images/ramdisk.image.gz
		fi           

		rm -rf /tmp/ramrootfs
		rm -rf /tmp/tmpmnt

		echo Your $ARCH root filesystem ramdisk is /tftpboot/$ARCH-ramdisk.gz
	fi
fi


if [ $ARCH == "i386" ]
then

	echo
	echo -n This script is about to work with your /dev/hdc1 partition, is this OK? yes/no?" "

	read hdc1ok

	if [ $hdc1ok == "yes" ] 
	then


	mkdir $ROOTFSLOC/boot
	
	#dev files
	cd $ROOTFSLOC/dev
	rm -rf console
	mknod console c 5 1
	chmod 666 console
	mknod hda b 3 0
	mknod hda1 b 3 1
	mknod hda2 b 3 2
	chmod 666 hda*
	
	#/boot files
	cp /boot/boot.b $ROOTFSLOC/boot
	cp /usr/src/linux/arch/i386/boot/bzImage $ROOTFSLOC/boot/bzImage
		
	TMPMOUNT=/tmp/tmpmnt
	
cat > /tmp/lilo.conf.1 << ENDOFINPUT
# this is a special lilo.conf file used to install lilo on the /dev/hdc drive
# when the machine is booted from the /dev/hda drive. Don't run lilo with this
# conf file if you booted the machine from this second drive.

disk=/dev/hdc bios=0x80         # This tells LILO to treat hdc as hda
#disk=/dev/hdc 
# bios=0x80 
# cylinders=612                 # this is experimenting with 40MB SanDisk flash card
# heads=4 
# sectors=32
#linear
#append="hd=612/4/32"


boot=/dev/hdc                   # install boot on hdc
map=$TMPMOUNT/boot/map          # location of the map file
install=$TMPMOUNT/boot/boot.b   # boot file to copy to boot sector

prompt                          # show LILO boot: prompt

timeout=1                      # wait a second for user input

image=$TMPMOUNT/boot/bzImage    # kernel location
label=linux                     # kernel label

root=/dev/hda1                  # root image location after you finalize disk location

read-only                       # mount root as read only


ENDOFINPUT

cat > $ROOTFSLOC/etc/fstab << endofinput
# <file system>  <mount point>   <type>  <options>                      <dump>  <pass>
/dev/hda1        /              ext2    defaults,errors=remount-ro      0       1
proc             /proc          proc    defaults                        0       0
endofinput
	
	e2fsck -y /dev/hdc1

	rm -rf $TMPMOUNT
	mkdir $TMPMOUNT
	mount -t ext2 /dev/hdc1 $TMPMOUNT
	
	echo -n "Do you want to erase the /dev/hdc1 partition, continue yes/no? "
	read deleteall
	
	if [ $deleteall == "yes" ]
	then
		# this deletes everything on your partition, WATCH OUT!!
		rm -rf $TMPMOUNT/*
		mkdir $TMPMOUNT/lost+found
	fi
	
	cp -av $ROOTFSLOC/* $TMPMOUNT
	
	/sbin/lilo -C /tmp/lilo.conf.1

	cd /
	umount $TMPMOUNT
	rm -rf $TMPMOUNT

	e2fsck -y /dev/hdc1
fi


#hdc1ok
fi

echo Step 9 - Complete
echo

echo Your $ARCH root filesystem         is  $ROOTFSLOC