Clifford Wolf:

Documentation/Developers/REGISTER

@@ -25,9 +25,9 @@ Reserved User and Group IDs:
   - news users:		- news groups:
       news   15             news    15
 
-  - hardware access groups:
-      video  16
-      sound  17
+                        - hardware access groups:
+                            video   16
+                            sound   17
 
   - sendmail users:     - sendmail groups:
       smmsp  18		    smmsp   18
@@ -53,6 +53,14 @@ Reserved User and Group IDs:
   - exim users:		- exim groups:
       exim   30		   exim     30
 
+                        - more hardware access groups:
+                           floppy   31
+                           lp       32
+                           nvram    33
+                           scanner  34
+                           tape     35
+                           uucp     36
+
   - nullmailer users:   - nullmailer groups:
       nullmailer 38        nullmailer 38
 
@@ -108,7 +116,7 @@ Reserved User and Group IDs:
   - avahi user:         - netdev group:
       avahi 81              netdev 81
 
-  Free IDs:  31-37,46-50,55,57-65,67-69,72-77, from 82 onwards
+  Free IDs:  37,46-50,55,57-65,67-69,72-77, from 82 onwards
 
 
 Filedescriptor Numbers

package/base/sysfiles/etc_group.txt

@@ -11,6 +11,12 @@ video:x:16:
 audio:x:17:
 sound:x:17:
 cdrom:x:29:
+floppy:x:31:
+lp:x:32:
+nvram:x:33:
+scanner:x:34:
+tape:x:35:
+uucp:x:36:
 users:x:100:
 nogroup:x:65534:
 nobody:x:65534:

package/base/udev/udev.conf

@@ -54,6 +54,16 @@ udev_pm() {
 	chmod +x $root/lib/udev/*.sh $root/lib/udev/modalias_*
 
 	install_init udev $confdir/udev.init
+
+	found_group_error=0
+	for group in `grep 'GROUP="[^%]' $root/etc/udev/rules.d/*.rules | sed 's,.*GROUP=",,; s,".*,,;' | sort -u`
+	do
+		if ! grep -q "^$group:" $root/etc/group; then
+			echo "ERROR: Found udev rules not existing group '$group'."
+			found_group_error=1
+		fi
+	done
+	[ $found_group_error = 0 ] || abort
 }
 
 udev_prem() {