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#!/bin/sh
# Original script by Andreas Teuchert <ant+dl@hsg-kl.de>
# Modified by Frédéric Boiteux <fboiteux@calistel.com>
PREREQ="blacklist udev"
prereqs()
{
echo "$PREREQ"
}
case $1 in
# get pre-requisites
prereqs)
prereqs
exit 0
;;
esac
# Boot type in initramfs's config
bootconf=$(egrep '^BOOT=' /conf/initramfs.conf | tail -1)
# can be superseded by command line (used by Debian-Live's netboot for example)
for ARGUMENT in $(cat /proc/cmdline); do
case "${ARGUMENT}" in
netboot=*)
NETBOOT="${ARGUMENT#netboot=}"
;;
esac
done
if [ "$bootconf" != "BOOT=nfs" ] && [ "$NETBOOT" = "" ]; then
# Not a net boot : nothing to do
exit 0
fi
# we want to do some basic IP
modprobe -q af_packet
# Available Ethernet interfaces ?
l_interfaces=$(cd /sys/class/net/ && ls -d eth* 2>/dev/null)
if [ $(echo $l_interfaces | wc -w) -lt 2 ]; then
# only one interface : no choice
echo "DEVICE=$l_interfaces" >> /conf/param.conf
exit 0
fi
while true; do
echo -n "Looking for a connected Ethernet interface ..."
for interface in $l_interfaces; do
# ATTR{carrier} is not set if this is not done
echo -n " $interface ?"
ipconfig -c none -d $interface -t 1 >/dev/null 2>&1
done
echo ''
for step in 1 2 3 4 5; do
for interface in $l_interfaces; do
carrier=$(cat /sys/class/net/$interface/carrier \
2>/dev/null)
# link detected
if [ "$carrier" = 1 ]; then
echo " found $interface."
# inform initrd's init script :
echo "DEVICE=$interface" >> /conf/param.conf
exit 0
fi
done
# wait a bit
sleep 1
done
done
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