base-files: cleanup mtd_get_mac_binary hexdump

Remove usage of dd, as per request from Yousong Zhou.
<https://lists.openwrt.org/pipermail/openwrt-devel/2015-December/037743.html>

Signed-off-by: Chris R Blake <chrisrblake93@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@47949 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/base-files/files/lib/functions/system.sh b/package/base-files/files/lib/functions/system.sh
index 03d7127..35f6d10 100644 (file)
--- a/package/base-files/files/lib/functions/system.sh
+++ b/package/base-files/files/lib/functions/system.sh
@@ -38,7 +38,7 @@ mtd_get_mac_binary() {
                return
        fi
 
-       dd bs=1 skip=$offset count=6 if=$part 2>/dev/null | hexdump -v -n 6 -e '5/1 "%02x:" 1/1 "%02x"'
+       hexdump -v -n 6 -s $offset -e '5/1 "%02x:" 1/1 "%02x"' $part 2>/dev/null
 }
 
 mtd_get_mac_binary_ubi() {