/usr/share/initramfs-tools/scripts/live-premount/select_eth_device is in live-boot-initramfs-tools 3.0~a24-1ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 | #!/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# can be superseded by command line (used by Debian-Live's netboot for example)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
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