Implement a more efficient way to assign addresses: read /etc/hosts

only once into an array of shell variables, and then scan the array
to find entries matching the MAC address.
Associative arrays would really be handy here...

release/picobsd/floppy.tree/etc/rc.conf

@@ -48,43 +48,61 @@ get_ether() {
     ether=""
     set `ifconfig ${key}`
     while [ "$1" != "" ] ; do
-    if [ "$1" = "ether" ] ; then
-	ether=$2
-	break
-    else
-	shift
-    fi
+        if [ "$1" = "ether" ] ; then
+            ether=$2
+            break
+        else
+            shift
+        fi
     done
 }
 
+# read content from /etc/hosts into an array (needed later in fetch_hostname)
+read_hosts() {
+    local i a b c key junk
+    i=""
+    while read a b c junk ; do
+        if [ "$a" = "#ethertable" ] ; then
+            i=0
+        elif [ "$i" != "" -a "X$a" = "X#" -a "$b" != "" ] ; then
+            eval eth_${i}=$b
+            eval eth_host_${i}=$c
+            i=$(($i+1))
+        fi
+    done < /etc/hosts
+}
+
 # set "hostname" using $1 (ethernet address) as search key in /etc/hosts
 fetch_hostname() {
-    local a b c key junk
-    key=$1     # search key
-    hostname=""
-    while read a b c junk ; do
-    if [ "$a" = "#ethertable" ] ; then
-	hostname="."
-    elif [ "X$hostname" = "X." -a "X$a" = "X#" ] ; then
-	case X${key} in
-	X${b} ) # so we can use wildcards
-	    hostname=$c
-	    break
-	    ;;
-	esac
+    local i b key
+    key=$1
+    i=0
+    b="x"
+    if [ "${eth_0}" = "" ] ; then
+	read_hosts
     fi
-    done < /etc/hosts
+    hostname=""
+    while [ "$b" != "" -a "${hostname}" = "" ] ; do
+        eval b=\${eth_${i}}
+        case X${key} in
+        X${b} ) # so we can use wildcards
+            eval hostname=\${eth_host_${i}}
+            break
+            ;;
+        esac
+        i=$(($i+1))
+    done
     echo "fetch_hostname for <${key}> returns <${hostname}>"
 }
 
 # sets "mask" using $1 (netmask name) as the search key in /etc/networks
 fetch_mask() {
-    local a b c key
-    key=$1     # search key, typically hostname-netmask
+    local a b key junk
+    key=$1	# search key, typically hostname-netmask
     mask=""
-    while read a b c; do # key mask otherstuff
+    while read a b junk; do # key mask otherstuff
 	case X${key} in
-	X${a} ) # we can use wildcards
+	X${a} )	# we can use wildcards
 	    mask=$b
 	    break
 	    ;;