X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=components%2F9990-select-eth-device.sh;fp=components%2F9990-select-eth-device.sh;h=7d1aa163282e002b68ebb7b9956a3b34fce2e3ec;hb=3b9aa28dd04d694d49a07cf4d13fc8c704891f5b;hp=0000000000000000000000000000000000000000;hpb=659360c19ad0a28a430545149fc2c4f834d11007;p=live-boot-grml.git

diff --git a/components/9990-select-eth-device.sh b/components/9990-select-eth-device.sh
new file mode 100755
index 0000000..7d1aa16
--- /dev/null
+++ b/components/9990-select-eth-device.sh
@@ -0,0 +1,104 @@
+#!/bin/sh
+
+Select_eth_device ()
+{
+	# 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+	# can be superseded by command line (used by Debian-Live's netboot for example)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 ${LIVE_BOOT_CMDLINE}
+	do
+		case "${ARGUMENT}" in
+			netboot=*)
+				NETBOOT="${ARGUMENT#netboot=}"
+				;;
+		esac
+	done
+
+	if [ "$bootconf" != "BOOT=nfs" ] && [ -z "$NETBOOT" ] && [ -z "$FETCH" ] && [ -z "$FTPFS" ] && [ -z "$HTTPFS" ]
+	then
+		# Not a net boot : nothing to do
+		return
+	fi
+
+	# we want to do some basic IP
+	modprobe -q af_packet
+
+	# Available Ethernet interfaces ?
+	l_interfaces=""
+
+	# See if we can derive the boot device
+	Device_from_bootif
+
+	if [ -z "$DEVICE" ]
+	then
+		echo "Waiting for ethernet card(s) up... If this fails, maybe the ethernet card is not supported by the kernel `uname -r`?"
+		while [ -z "$l_interfaces" ]
+		do
+			l_interfaces="$(cd /sys/class/net/ && ls -d eth* 2>/dev/null)"
+		done
+
+		if [ $(echo $l_interfaces | wc -w) -lt 2 ]
+		then
+			# only one interface : no choice
+			echo "DEVICE=$l_interfaces" >> /conf/param.conf
+			return
+		fi
+
+		# If user force to use specific device, write it
+		for ARGUMENT in ${LIVE_BOOT_CMDLINE}
+		do
+			case "${ARGUMENT}" in
+				live-netdev=*)
+				NETDEV="${ARGUMENT#live-netdev=}"
+				echo "DEVICE=$NETDEV" >> /conf/param.conf
+				echo "Found live-netdev parameter, forcing to to use network device $NETDEV."
+				return
+				;;
+			esac
+		done
+	else
+		l_interfaces="$DEVICE"
+	fi
+
+	found_eth_dev=""
+	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/$interface/carrier \
+					2>/dev/null)
+				# link detected
+
+				case "${carrier}" in
+					1)
+						echo "Connected $interface found"
+						# inform initrd's init script :
+						found_eth_dev="$found_eth_dev $interface"
+						;;
+				esac
+			done
+			if [ -n "$found_eth_dev" ]
+			then
+				echo "DEVICE='$found_eth_dev'" >> /conf/param.conf
+				return
+			else
+				# wait a bit
+				sleep 1
+			fi
+		done
+	done
+}