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authorMathias Kresin <dev@kresin.me>2018-08-11 10:10:21 +0200
committerJo-Philipp Wich <jo@mein.io>2018-12-18 11:01:56 +0100
commitd93bd72a9806e771f2d0d0578c610ac8bd4e45a0 (patch)
tree8816ed2f95abcd97e01a9b529fe400b4cec1ac40
parent54278dfa69380cb84dce12438fd7057ca0634d85 (diff)
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base-files: add function to get mac as text from flash
Add a function to get a mac stored as text from flash. The octets of the mac address need to be separated by any separator supported by macaddr_canonicalize(). Signed-off-by: Dmitry Tunin <hanipouspilot@gmail.com> Signed-off-by: Mathias Kresin <dev@kresin.me> (backported from dfee452713e6b3c10aafc6174f8087a920b54402)
-rw-r--r--package/base-files/files/lib/functions/system.sh23
1 files changed, 23 insertions, 0 deletions
diff --git a/package/base-files/files/lib/functions/system.sh b/package/base-files/files/lib/functions/system.sh
index e178f26f39..7ed62804a0 100644
--- a/package/base-files/files/lib/functions/system.sh
+++ b/package/base-files/files/lib/functions/system.sh
@@ -38,6 +38,29 @@ mtd_get_mac_ascii() {
[ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
}
+mtd_get_mac_text() {
+ local mtdname=$1
+ local offset=$2
+ local part
+ local mac_dirty
+
+ part=$(find_mtd_part "$mtdname")
+ if [ -z "$part" ]; then
+ echo "mtd_get_mac_text: partition $mtdname not found!" >&2
+ return
+ fi
+
+ if [ -z "$offset" ]; then
+ echo "mtd_get_mac_text: offset missing!" >&2
+ return
+ fi
+
+ mac_dirty=$(dd if="$part" bs=1 skip="$offset" count=17 2>/dev/null)
+
+ # "canonicalize" mac
+ [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
+}
+
mtd_get_mac_binary() {
local mtdname="$1"
local offset="$2"