Adding new class computer without modifying dhcpd.conf

[Sébastien GALLET]

Hi all,
When installing new computers with FAI, you need to update dhcpd.conf 
(and restart dhcpd server).
With this little patch,  these modifications are not necessary

--- /usr/lib/fai/sbin/rcS_fai.orig      2004-08-01 13:20:12.000000000 +0200
+++ /usr/lib/fai/sbin/rcS_fai   2004-08-01 13:23:47.000000000 +0200
@@ -137,6 +137,17 @@

     # these tasks can define variables, that are needed later
     task confdir
+
+    namefrommac=`$FAI/hostfrommac`
+    echo hostname = $namefrommac
+    if [ ! -z $namefrommac ]; then
+        sndmon "change HOSTNAME to $namefrommac"
+        HOSTNAME=$namefrommac
+    else
+        HOSTNAME=`uname -n | cut -d. -f1`
+    fi
+    export HOSTNAME
+
     task setup
     task defclass
     task defvar
--- /usr/bin/fai-class.orig     2004-08-01 13:49:27.000000000 +0200
+++ /usr/bin/fai-class  2004-08-01 13:49:46.000000000 +0200
@@ -131,7 +131,7 @@
        verbosemsg "Setting LOGDIR to default value /tmp/fai"
        LOGDIR=/tmp/fai; export LOGDIR
     fi
-    HOSTNAME=`uname -n | cut -d. -f1`; export HOSTNAME
+#    HOSTNAME=`uname -n | cut -d. -f1`; export HOSTNAME
 }
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 # main program

Now create a script "hostfrommac" in /fai. This small script maps a MAC 
address to a class name :

#!/bin/sh

INT=eth0
STATE=`ifconfig $INT | grep "inet addr"`
if [ -z "$STATE" ]; then
        INT=eth1
        STATE=`ifconfig $INT | grep "inet addr"`       
fi
echo "Find active network interface : $INT"  >> /tmp/fai/rcS.log

# Mac Address Mapping
MAC_ADDR=`ifconfig $INT | grep HWaddr | sed -e "s/.*HWaddr //" | sed -e 
"s/ //g" | tr '[:lower:]' '[:upper:]'`
echo "MAC_ADDR = $MAC_ADDR ." >> /tmp/fai/rcS.log
case $MAC_ADDR in
     00:50:FC:73:E7:CE)
                echo "$MAC_ADDR found"  >> /tmp/fai/rcS.log
                echo model00
                ;;        
     00:60:08:79:00:7E)
                echo "$MAC_ADDR found"  >> /tmp/fai/rcS.log
                echo model00
                ;;    
     *) echo "Cant find a class for $MAC_ADDR"  >> /tmp/fai/rcS.log
esac

Now, create nfsroot with fai-setup

That works for me (Sarge i386)

Regarde
Sébastien