diff options
Diffstat (limited to 'packages/nslu2-binary-only/unslung-rootfs/linuxrc')
| -rw-r--r-- | packages/nslu2-binary-only/unslung-rootfs/linuxrc | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/packages/nslu2-binary-only/unslung-rootfs/linuxrc b/packages/nslu2-binary-only/unslung-rootfs/linuxrc index e69de29bb2..b512a286a6 100644 --- a/packages/nslu2-binary-only/unslung-rootfs/linuxrc +++ b/packages/nslu2-binary-only/unslung-rootfs/linuxrc @@ -0,0 +1,135 @@ +#!/bin/sh + +# **** DO NOT EVEN THINK OF EDITING OR REMOVING THIS FILE **** +# **** UNLESS YOU REALLY KNOW *EXACTLY* WHAT YOU ARE DOING. **** + + +# Determine the desired rootfs based on user flag files. + +if [ -f /.ramdisk ] ; then + /bin/echo "Preferred root device is /dev/ram0 (maintenence)" + mounted=/mnt + prefroot=maintenence +elif [ -f /.sda1root ] ; then + /bin/echo "Preferred root device is /dev/sda1 (disk 1)" + mounted=/mnt + prefroot=sda1 +elif [ -f /.sda2root ] ; then + /bin/echo "Preferred root device is /dev/sda2 (disk 1)" + mounted=/mnt + prefroot=sda2 +elif [ -f /.sdb1root ] ; then + /bin/echo "Preferred root device is /dev/sdb1 (disk 2)" + mounted=/mnt + prefroot=sdb1 +elif [ -f /.sdb2root ] ; then + /bin/echo "Preferred root device is /dev/sdb2 (disk 2)" + mounted=/mnt + prefroot=sdb2 +elif [ -f /.nfsroot ] ; then + /bin/echo "Preferred root device is NFS" + mounted=/mnt + prefroot=nfsroot +else + /bin/echo "Preferred root device is jffs2" + mounted= + prefroot=jffs2 +fi + + +# Perform prepatory tasks, and determine whether the desired rootfs is viable. + +/bin/mount -t proc proc /proc + +if [ $prefroot = "sda1" -o $prefroot = "sda2" -o $prefroot = "sdb1" -o $prefroot = "sdb2" ] ; then + /bin/echo "Sleeping 10sec while waiting for disk..." + sleep 10 + /bin/mount -rt ext3 /dev/$prefroot /mnt + if [ -L /mnt/sbin/init -o -x /mnt/sbin/init -o \ + -L /mnt/bin/init -o -x /mnt/bin/init ] ; then + /bin/echo "Root filesystem will be mounted from /dev/$prefroot ..." + else + /bin/umount /mnt + /bin/echo "Can't find valid rootfs on /dev/$prefroot, using jffs2 ..." + mounted= + prefroot=jffs2 + fi +fi + +if [ $prefroot = "maintenence" ] ; then + /bin/dd if=/dev/zero of=/dev/ram0 bs=1k count=12k 2>/dev/null + /usr/bin/mke2fs -m 0 /dev/ram0 12288 + /bin/mount -t ext2 /dev/ram0 /mnt + ( /usr/bin/find . -print0 -mount | /usr/bin/cpio -p -0 -d -m -u /mnt ) + /bin/rm -f /mnt/linuxrc + /bin/mkdir /mnt/mnt/backup /mnt/mnt/repair /mnt/mnt/tmpmnt +fi + +if [ $prefroot = "nfsroot" ] ; then + + sysconflen=`/bin/dd if=/dev/mtd1 bs=4 count=1 2>/dev/null | /usr/bin/hexdump -n 6 -e '"%02d"'` + ipaddr=`/bin/dd if=/dev/mtd1 bs=1 count=$sysconflen skip=4 2>/dev/null | grep ip_addr | sed -e s/ip_addr=//` + netmask=`/bin/dd if=/dev/mtd1 bs=1 count=$sysconflen skip=4 2>/dev/null | grep netmask | sed -e s/netmask=//` + gateway=`/bin/dd if=/dev/mtd1 bs=1 count=$sysconflen skip=4 2>/dev/null | grep gateway | sed -e s/gateway=//` + + /sbin/insmod ixp400 + /sbin/insmod ixp425_eth + /sbin/ifconfig ixp0 up $ipaddr netmask $netmask + /sbin/route add default gw $gateway + + /sbin/ifconfig lo up 127.0.0.1 + + # The nfsrootloc and nfsrootopts vars can be overridden here. + . /.nfsroot + + /bin/mount $nfsrootopts $nfsrootloc /mnt + + if [ -L /mnt/sbin/init -o -x /mnt/sbin/init -o \ + -L /mnt/bin/init -o -x /mnt/bin/init ] ; then + /bin/echo "Root filesystem will be mounted from an NFS root ..." + mounted=/mnt + else + /bin/umount /mnt + /bin/echo "Can't find valid NFS rootfs, using jffs2 ..." + mounted= + prefroot=jffs2 + fi +fi + +if [ $prefroot = "jffs2" ] ; then + /bin/echo "Root filesystem will be mounted from /dev/mtdblock4 ..." + mounted= +fi + + +/bin/umount /proc + +# Pivot to the desired rootfs and run the initial executable. + +if [ -n "$mounted" ] ; then + + cd $mounted + + if [ -x ./sbin/init -o -L ./sbin/init ] ; then + runboot=/sbin/init + elif [ -x ./bin/init -o -L ./bin/init ] ; then + runboot=/bin/init + else + runboot=/bin/sh + fi + + /sbin/pivot_root . initrd + + exec /usr/sbin/chroot . $runboot < /dev/console 1> /dev/console 2> /dev/console + +else + + exec /bin/init + +fi + +/bin/echo "Can't chroot to $prefroot, using jffs2 ..." +exec /bin/init + +# Last-resort fall-back - this should never be reached. +/bin/sh |