add static uid, but handle squashfs rootfs systems correctly

SVN-Revision: 469

openwrt/package/openntpd/ipkg/CONTROL/postinst

@@ -1,25 +1,35 @@
 #!/bin/sh
+
+name=ntp
+id=50
+
+# do not change below
+# check if we are on real system
+if [ -z "${IPKG_INSTROOT}" ]; then
+	# create copies of passwd and group, if we use squashfs
+	rootfs=`mount |awk '/root/ { print $5 }'`
+	if [ "$rootfs" = "squashfs" ]; then
+		if [ -h /etc/group ]; then
+			rm /etc/group
+			cp /rom/etc/group /etc/group
+		fi
+		if [ -h /etc/passwd ]; then
+			rm /etc/passwd
+			cp /rom/etc/passwd /etc/passwd
+		fi
+	fi
+fi
+
+echo ""
+if [ -z "$(grep ^\\${name}: ${IPKG_INSTROOT}/etc/group)" ]; then 
+	echo "adding group $name to /etc/group"
+	echo "${name}:x:${id}:" >> ${IPKG_INSTROOT}/etc/group  
+fi
+
+if [ -z "$(grep ^\\${name}: ${IPKG_INSTROOT}/etc/passwd)" ]; then 
+	echo "adding user $name to /etc/passwd"
+	echo "${name}:x:${id}:${id}:${name}:/tmp/.${name}:/bin/false" >> ${IPKG_INSTROOT}/etc/passwd
+fi
+
 grep -q '^ntp[[:space:]]*123/udp' ${IPKG_INSTROOT}/etc/services 2>/dev/null
 [ $? -ne 0 ] && echo "ntp	123/udp" >>${IPKG_INSTROOT}/etc/services
-
-NU=ntp
-U=`grep "^$NU:" ${IPKG_INSTROOT}/etc/passwd 2>/dev/null | cut -d: -f3`
-if [ .$U = . ]; then
-	U=`cut -d: -f3 ${IPKG_INSTROOT}/etc/passwd 2>/dev/null | sort -n | tail -1`
-	[ .$U = . ] && U=49
-	U=`expr $U + 1`
-	[ $U -lt 50 ] && U=50
-	G=`grep "^$NU:" ${IPKG_INSTROOT}/etc/group 2>/dev/null | cut -d: -f3`
-	if [ .$G = . ]; then
-		G=`cut -d: -f3 ${IPKG_INSTROOT}/etc/group 2>/dev/null | sort -n | tail -1`
-		[ .$G = . ] && G=49
-		G=`expr $G + 1`
-		[ $G -lt 50 ] && G=50
-	fi
-	LINE="$NU:x:$U:$G::/tmp/.ntp:/bin/false"
-	echo "$LINE" >>${IPKG_INSTROOT}/etc/passwd
-else
-	awk -F: '{ if($1=="ntp") printf("%s:%s:%s:%s:%s:/tmp/.ntp:/bin/false\n",$1,$2,$3,$4,$5); else print $0 }' ${IPKG_INSTROOT}/etc/passwd >/tmp/$$
-	mv /tmp/$$ ${IPKG_INSTROOT}/etc/passwd
-	chmod 644 ${IPKG_INSTROOT}/etc/passwd
-fi