[Bootcd-user] bootcdmkinitrd and scsi

[azajac@vif.com]

Here is the modified bootcdmkinitrd.  It works at getting ide-scsi to work.

I have tried it with a 2.4.21 kernel with the parameters "hda=scsi hdb=scsi
hdc=scsi hdd=scsi hde=scsi hdf=scsi" so that it could work on many different
setups.

With this as it is, I get a kernel panic if I chose the wrong option at the
startup (like picking scd0 if I am really booting from scd1...)  I would still
like to find a way to boot automatically and not have to tell the kernel where
the root filesystem is...

I made /bootmount the directory in the initrd as the mountpoint for the cd
device.  I also used /bootmount in the real filesystem to contain a file named
"version" to be detected by the inird script.  All this file needs to do is
exist...  Maybe I should name that directory something different like /bootfind
or something to avoid confusion...

Cheers!
AZ.



#!/bin/sh
# /usr/sbin/bootcdmkinitrd

set -u

KERN=$(uname -r)
INITRD=/boot/initrd.img-$KERN
ETCMKI=/etc/mkinitrd
devices=""
s=""

# Warning

echo "Warning: this script assumes the following:"
echo "- the running kernel is the one that will be used on bootcd"
echo "- initrd is used"
echo "- lilo is used"
echo "Warning: this script will do the following:"
echo "- /etc/mkinitrd/ will be changed."
echo "- mkinitrd will be called. This will change $INITRD."
echo "- lilo will be called."
while :; do
  echo -n "OK to continue ? (y|n)"
  read A
  [ "$A" = "n" ] && exit
  [ "$A" = "y" ] && break
done

# Checks

if [ ! "$(grep "^[[:blank:]]*initrd=" /etc/lilo.conf)" ]; then
  echo "/etc/lilo.conf has no line initrd=. This means that you" >&2
  echo "are not using lilo, or that you are not using initrd." >&2
  echo "This skript only works with lilo and initrd." >&2
  exit 1
fi

if [ ! "$(grep "^[[:blank:]]*initrd=/initrd.img[[:blank:]]*$" /etc/lilo.conf)"
]; then
  echo "Your /etc/lilo.conf has no line with initrd=/initrd.img. Because" >&2
  echo "this script can only support standard configurations, please edit" >&2
  echo "lilo.conf run lilo and reboot to test your configuration. Then " >&2
  echo "run this script again." >&2
  exit 1
fi

if [ ! "$(/bin/ls -l /initrd.img | grep -e "-> $INITRD$")" ]; then
  echo "/initrd.img must be a link to $INITRD." >&2
  exit 1
fi

if [ ! -d $ETCMKI ]; then
  echo "ERROR: No mkinitrd config dir $ETCMKI." >&2
  echo "       Is initrd-tools.deb installed ?" >&2
fi

if [ ! -f $INITRD ]; then
  echo "$INITRD does not exist." >&2
  exit 1
fi



# Start

[ -f /etc/mkinitrd.tgz ] && mv /etc/mkinitrd.tgz /etc/mkinitrd.tgz.old
(cd /etc; tar czf mkinitrd.tgz mkinitrd)

F=/etc/mkinitrd/exe
touch $F
cp $F $F.tmp
cat $F.tmp | grep -v "^/sbin/discover\>" >$F
echo "/sbin/discover" >>$F
rm $F.tmp

F=/etc/mkinitrd/modules
touch $F
cp $F $F.tmp
cat $F.tmp | grep -v "^isofs\>" >$F
echo "isofs" >>$F
rm $F.tmp

F=/etc/mkinitrd/files
touch $F
cp $F $F.tmp
cat $F.tmp | grep -v "^/usr/share/discover/.*\.lst\>" >$F
ls /usr/share/discover/*.lst >>$F
rm $F.tmp

F1=/etc/mkinitrd/scripts/50bootcddiscover
cat <<end1 >$F1
#!/bin/sh
F2=\$INITRDDIR/scripts/bootcd
mkdir \$INITRDDIR/bootmount
mkdir \$INITRDDIR/old
cat <<end2 >\$F2
/bin/echo "running /scripts/bootcd" >&2
mount -nt proc proc /proc
MODULES=\\\$(discover --disable-all --enable=pci --module scsi)
for M in \\\$MODULES; do
  modprobe \\\$M
done
devices=\\\$(discover --device cdrom)
for s in \\\$devices
    do
    mount -n \\\$s /bootmount
    if test -f /bootmount/bootmount/version
    then echo found root at \\\$s
	 pivot_root /bootmount /old
	 unmount -n /proc
	 exit
    fi
    umount -n /bootmount
    done
umount -n /proc
end2
chmod 755 \$F2
end1
chmod 755 $F1

mkinitrd -k -o /initrd.img
lilo

# Warning

echo "Please reboot now, before using bootcdwrite"