1 files changed, 102 insertions, 0 deletions
diff --git a/initramfs-tools/scripts/live-premount/select_eth_device b/initramfs-tools/scripts/live-premount/select_eth_device
new file mode 100755
index 0000000..fe86313
--- /dev/null
+++ b/initramfs-tools/scripts/live-premount/select_eth_device
@@ -0,0 +1,102 @@
+#!/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+# can be superseded by command line (used by Debian-Live's netboot for example)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" ] &&
+   [ "$NETBOOT" = "" ] &&
+   [ "$FETCH" = "" ] &&
+   [ "$FTPFS" = "" ] &&
+   [ "$HTTPFS" = "" ]
+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=""
+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
+	exit 0
+fi
+
+# If user force to use specific device, write it
+for ARGUMENT in $(cat /proc/cmdline); do
+    case "${ARGUMENT}" in
+        live-netdev=*)
+        NETDEV="${ARGUMENT#live-netdev=}"
+        echo "DEVICE=$NETDEV" >> /conf/param.conf
+	echo "Found live-netdev parameter in /proc/cmdline. Force to use network device $NETDEV."
+        exit 0
+        ;;
+    esac
+done
+
+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/$interface/carrier \
+				2>/dev/null)
+			# link detected
+			if [ "$carrier" = 1 ]; then
+				echo "Connected $interface found"
+				# inform initrd's init script :
+				found_eth_dev="$found_eth_dev $interface"
+			fi
+		done
+		if [ -n "$found_eth_dev" ]; then
+			echo "DEVICE='$found_eth_dev'" >> /conf/param.conf
+			exit 0
+		else
+			# wait a bit
+			sleep 1
+		fi
+	done
+done