base-files: allocate uid/gid starting from 65536

There already exist static assignment of uid/gid 65533 in packages feed
and we have nobody/nogroup taking 65534 as their ids.  Let's change the
pid of dynamic assignment to start from 65536 so that the two assignment
scheme will not collide with each other

While at it, fix the scan command checking existence of uid/gid

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

package/base-files/Makefile

@@ -11,7 +11,7 @@ include $(INCLUDE_DIR)/kernel.mk
 include $(INCLUDE_DIR)/version.mk
 
 PKG_NAME:=base-files
-PKG_RELEASE:=173
+PKG_RELEASE:=174
 PKG_FLAGS:=nonshared
 
 PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/

package/base-files/files/lib/functions.sh

@@ -306,8 +306,8 @@ group_add_next() {
 	gid=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
 	[ -n "$gid" ] && return $gid
 	gids=$(cat ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
-	gid=100
-	while [ -n "$(echo $gids | grep $gid)" ] ; do
+	gid=65536
+	while [ -n "$(echo "$gids" | grep "^$gid$")" ] ; do
 	        gid=$((gid + 1))
 	done
 	group_add $1 $gid
@@ -334,8 +334,8 @@ user_add() {
 	local rc
 	[ -z "$uid" ] && {
 		uids=$(cat ${IPKG_INSTROOT}/etc/passwd | cut -d: -f3)
-		uid=100
-		while [ -n "$(echo $uids | grep $uid)" ] ; do
+		uid=65536
+		while [ -n "$(echo "$uids" | grep "^$uid$")" ] ; do
 		        uid=$((uid + 1))
 		done
 	}