Release new version 1:20210208+grml.5

[live-boot-grml.git] / components / 9990-select-eth-device.sh

diff --git a/components/9990-select-eth-device.sh b/components/9990-select-eth-device.sh
index 7d1aa16..d767455 100755 (executable)
--- a/components/9990-select-eth-device.sh
+++ b/components/9990-select-eth-device.sh
@@ -1,5 +1,30 @@
 #!/bin/sh
 
+Wait_for_carrier ()
+{
+       # $1 = network device
+       echo -n "Waiting for link to come up on $1... "
+       ip link set $1 up
+       for step in $(seq 1 15)
+       do
+               carrier=$(cat /sys/class/net/$1/carrier \
+               2>/dev/null)
+               case "${carrier}" in
+                       1)
+                       echo -e "\nLink is up"
+                       return
+                       ;;
+                       *)
+                       # Counter
+                       echo -n "$step "
+                       ;;
+               esac
+               sleep 1
+       done
+       echo -e "\nError - carrier not detected on $1."
+       ip link set $1 down
+}
+
 Select_eth_device ()
 {
        # Boot type in initramfs's config
@@ -24,6 +49,10 @@ Select_eth_device ()
        # we want to do some basic IP
        modprobe -q af_packet
 
+       # Ensure all our net modules get loaded so we can actually compare MAC addresses...
+       udevadm trigger
+       udevadm settle
+
        # Available Ethernet interfaces ?
        l_interfaces=""
 
@@ -35,13 +64,14 @@ Select_eth_device ()
                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)"
+                       l_interfaces="$(cd /sys/class/net/ && ls -d * 2>/dev/null | grep -v "lo")"
                done
 
                if [ $(echo $l_interfaces | wc -w) -lt 2 ]
                then
                        # only one interface : no choice
                        echo "DEVICE=$l_interfaces" >> /conf/param.conf
+                       Wait_for_carrier $l_interfaces
                        return
                fi
 
@@ -51,8 +81,26 @@ Select_eth_device ()
                        case "${ARGUMENT}" in
                                live-netdev=*)
                                NETDEV="${ARGUMENT#live-netdev=}"
+
+                               # Check if NETDEV is a valid MAC address
+                               if echo "$NETDEV" | grep -Eq '^[0-9A-Fa-f]{2}[:-]([0-9A-Fa-f]{2}[:-]){4}[0-9A-Fa-f]{2}$'
+                               then
+                                       echo "NETDEV is a valid MAC address."
+
+                                       # Retrieve the device name associated with the MAC address
+                                       DEVICE_NAME=$(ip -o link | awk -v mac="$NETDEV" '$0 ~ mac{print substr($2, 1, length($2)-1)}')
+                                       if [ -n "$DEVICE_NAME" ]
+                                       then
+                                               echo "Device name for MAC address $NETDEV is $DEVICE_NAME."
+                                               NETDEV="$DEVICE_NAME"
+                                       fi
+                               else
+                                       echo "NETDEV is not a valid MAC address. Assuming it is a device name."
+                               fi
+
                                echo "DEVICE=$NETDEV" >> /conf/param.conf
-                               echo "Found live-netdev parameter, forcing to to use network device $NETDEV."
+                               echo "Found live-netdev parameter, forcing it to use network device $NETDEV."
+                               Wait_for_carrier "$NETDEV"
                                return
                                ;;
                        esac
@@ -71,6 +119,7 @@ Select_eth_device ()
                        # ATTR{carrier} is not set if this is not done
                        echo -n " $interface ?"
                        ipconfig -c none -d $interface -t 1 >/dev/null 2>&1
+                       sleep 1
                done
 
                echo ''
@@ -79,6 +128,7 @@ Select_eth_device ()
                do
                        for interface in $l_interfaces
                        do
+                               ip link set $interface up
                                carrier=$(cat /sys/class/net/$interface/carrier \
                                        2>/dev/null)
                                # link detected
@@ -88,6 +138,7 @@ Select_eth_device ()
                                                echo "Connected $interface found"
                                                # inform initrd's init script :
                                                found_eth_dev="$found_eth_dev $interface"
+                                               found_eth_dev="$(echo $found_eth_dev | sed -e "s/^[[:space:]]*//g")"
                                                ;;
                                esac
                        done