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#! /bin/sh
#
# Copyright Matthias Hentges <devel@hentges.net> (c) 2006
# License: GPL (see http://www.gnu.org/licenses/gpl.txt for a copy of the license)
#
# Filename: 40-bootNFS
# Date: 14-Apr-06
M_TITLE="Boot from NFS"
die() {
echo -e "ERROR: $1" >/dev/tty0
exec $SH_SHELL </dev/tty0 >/dev/tty0 2>&1
}
# This function is activated by init.altboot by calling this script with the "run" option
run_module() {
test -e /etc/altboot.func && . /etc/altboot.func || die "ERROR: /etc/altboot.func not found. Check your installation!"
# Mount /proc, etc
init_rootfs
# Needed for NFS
/etc/init.d/portmap start >/dev/null 2>&1 || die "/etc/init.d/portmap start failed!"
# For some reason NFS mounts hang if /e/i/networking is not run.
# For the time beeing I'm too lazy to investigate ;)
/etc/init.d/networking start >/dev/null 2>&1 || die "/etc/init.d/networking start failed!"
sleep 2
# After the PCMCIA service is started, an inserted WLAN card should automatically
# activate itself.
if test -x /etc/init.d/pcmcia
then
/etc/init.d/pcmcia start >/dev/null 2>&1 || die "/etc/init.d/pcmcia start failed!"
else
# With kernel 2.6.16+ udev is used
/etc/init.d/udev start >/dev/null 2>&1 || die "/etc/init.d/udev start failed!"
/etc/init.d/udev stop
fi
nfs_host="`cat /etc/fstab | grep -v ^# | grep nfs | awk '{print $1}'|sed -n "s/\(.*\)\:\(.*\)/\1/p" `"
nfs_mounts="`cat /etc/fstab | grep -v ^# | grep nfs | awk '{print $1}'`"
nfs_mountpoints="`cat /etc/fstab | grep -v ^# | grep nfs | awk '{print $2}'`"
WLAN_NIC="`iwconfig 2>/dev/null | grep ESSID | awk '{print $1}'`"
if test -z "$nfs_host"
then
die "${C_RED}No configured NFS drives found in /etc/fstab$C_RESET"
fi
# WLAN with DHCP needs some time to get a lease, set up the routing, etc.
echo -n "Waiting for WLAN"
cnt=0
while true
do
if (ping -c 1 $nfs_host) >/dev/null 2>&1
then
echo " found"
break
else
if test "$cnt" = 30 -o "$cnt" = 60
then
echo ""
echo "WARNING: WLAN didn't activate in $cnt seconds!"
if test "$cnt" = 30
then
let cnt=$cnt+1
echo "Restarting udhcpc for [$WLAN_NIC]"
killall udhcpc
udhcpc -i "$WLAN_NIC" -H `cat /etc/hostname` >/dev/tty1 2>&1
else
mdie "Failed to activate WLAN!"
break
fi
else
echo -n "."
let cnt=$cnt+1
fi
fi
sleep 1
done
if test "` echo "$nfs_mountpoints" |wc -l | tr -d " "`" -gt 1
then
echo -e "Please select your NFS root:\n"
cnt=1
for nfs_mount in $nfs_mountpoints
do
echo -e "\t[$cnt] $nfs_mount"
let cnt=$cnt+1
done
echo ""
while test -z "$selection"
do
stty echo
echo -n "Boot NFS root: "
if test "$AUTOBOOT" != "yes"
then
read junk < /dev/tty1
else
if test -e /etc/.altboot-bootNFS-source.last
then
junk="`cat /etc/.altboot-bootNFS-source.last`"
test -z "$junk" && read junk < /dev/tty1 || echo "$junk (autoboot)"
else
read junk < /dev/tty1
fi
fi
cnt=1
for nfs_mount in $nfs_mounts
do
if test "$junk" = "$cnt"
then
selection="$nfs_mount"
echo "$junk" > /etc/.altboot-bootNFS-source.last
fi
let cnt=$cnt+1
done
done
else
test -z "$nfs_mounts" && die "No NFS mounts configured in /etc/fstab!"
selection="$nfs_mounts"
fi
mkdir -p /media/nfsroot || die "mkdir -p /media/nfsroot failed!"
echo -n "Mounting NFS root..."
if ( mount | grep -q "/media/nfsroot" )
then
echo "/media/nfsroot already used, tying to umount..."
umount /media/image
losetup -d /dev/loop0
umount /media/nfsroot || die "umount failed!"
fi
mount -t nfs "$selection" /media/nfsroot && echo ok || die "mount -t nfs "$selection" /media/nfsroot failed!"
# Use configured resolv.conf in the pivoted rootfs
#echo -n "Copying resolv.conf..."
#cp /etc/resolv.conf /media/nfsroot/etc && echo ok || echo "FAILED"
check_target "/media/nfsroot" bootNFS
}
case "$1" in
title) echo "$M_TITLE";;
run) run_module "$2";;
esac
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