jump through some hoops to find out the LCS interface name

1 files changed, 28 insertions, 3 deletions

diff --git a/loader2/linuxrc.s390 b/loader2/linuxrc.s390
index 6cd344cff..a0727865d 100644
--- a/loader2/linuxrc.s390
+++ b/loader2/linuxrc.s390
@@ -55,6 +55,32 @@ sysecho () {
 	[ -f $file ] && echo $* > $file
 }
 
+# jump through some hoops to find out the LCS interface name
+getlcsifname() {
+   local dirs driver readport ifname
+   ifname=""
+   dirs=`/bin/ls -d /sys/class/net/eth* /sys/class/net/tr* 2>/dev/null`
+   for i in $dirs; do
+      driver=`readlink $i/driver`
+      driver=`basename $driver`
+      if [ "$driver" == "lcs" ]; then
+         readport=`readlink $i/device`
+         readport=`basename $readport`
+         if [ "$readport" == "$1" ]; then
+            ifname=`basename $i`
+            break
+         fi
+      fi
+   done
+   if [ -n "$ifname" ]; then
+      DEVICE=$ifname
+   else
+      echo "Could not detect LCS interface, aborting..."
+      exit
+   fi
+}
+
+
 startinetd()
 {
 	echo
@@ -293,10 +319,9 @@ elif [ "$NETTYPE" = "lcs" ]; then
 	insmod cu3088$LO
 	insmod lcs$LO
    setupdevice
-# KH FIXME: Workaround for missing sysfs interface, hardcode it to
-# eth0 for now, ignore TokenRing
+# KH FIXME: Workaround for missing sysfs interface
 #   DEVICE=`cat /sys/devices/lcs/${SUBCHANNELS//,*/}/if_name`
-   DEVICE=eth0
+   getlcsifname ${SUBCHANNELS//,*/}
 	ifconfig $DEVICE $IPADDR $MMTU netmask $NETMASK broadcast $BROADCAST
 	route add -net $NETWORK netmask $NETMASK dev $DEVICE 2>/dev/null
    echo "alias $DEVICE lcs" >> /tmp/modprobe.conf