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#!/bin/sh
# **** DO NOT EVEN THINK OF EDITING OR REMOVING THIS FILE ****
# **** UNLESS YOU REALLY KNOW *EXACTLY* WHAT YOU ARE DOING. ****
# Perform prepatory tasks, and determine whether an alternate rootfs is viable.
/bin/mount -t proc proc /proc
echo "1" > /proc/sys/kernel/panic
/bin/echo "Sleeping while waiting for disk..."
cnt=20
while [ $cnt -gt 0 ] ; do
echo -ne "\r$cnt "
sleep 1
[ -f /proc/hdd_sdb ] && cnt=0
[ -f /proc/hdd_sda ] && cnt=0
cnt=`expr $cnt - 1`
done
echo
sleep 5
mounted=
for prefroot in sdb1 sda1 ; do
if [ -z "$mounted" ] ; then
if /bin/mount -rt ext3 /dev/$prefroot /mnt ; then
if [ -x /mnt/bin/init ] ; then
/bin/echo "Root filesystem will be mounted from /dev/$prefroot ..."
mounted=/mnt
else
/bin/umount /mnt
/bin/echo "Can't find valid rootfs on /dev/$prefroot ..."
fi
fi
fi
done
if [ -z "$mounted" ] ; then
/bin/echo "Can't find valid rootfs, using ramdisk ..."
mounted=
fi
/bin/umount /proc
# Pivot to the desired rootfs and run the initial executable.
if [ -n "$mounted" ] ; then
cd $mounted
/bin/echo "Pivoting to external rootfs ..."
/sbin/pivot_root . initrd
exec /usr/sbin/chroot . /bin/init < /dev/console 1> /dev/console 2> /dev/console
else
exec /bin/init
fi
/bin/echo "Can't pivot to external rootfs, using ramdisk ..."
exec /bin/init
# Last-resort fall-back - this should never be reached.
/bin/sh
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