[OpenWrt-Devel] [PATCH 1/2] base-files: rename hostname with EUI of mac address

[Adrian Schmutzler]

From: Rosy Song <rosysong at rosinson.com>

If a label MAC address is provided for device, system
will rename the hostname with OpenWrt_<EUI of MAC address>.
This helps to distinguish between different devices.

Since it's no good idea to nest json_* functions, this code does
not use get_mac_label directly, but only get_mac_label_dt as
external resource.

Signed-off-by: Rosy Song <rosysong at rosinson.com>
[rebased on updated label MAC address storage, extended commit message]
Signed-off-by: Adrian Schmutzler <freifunk at adrianschmutzler.de>
---
 package/base-files/files/bin/config_generate | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/package/base-files/files/bin/config_generate b/package/base-files/files/bin/config_generate
index 3ca035ca8b..b473eba9e9 100755
--- a/package/base-files/files/bin/config_generate
+++ b/package/base-files/files/bin/config_generate
@@ -3,6 +3,7 @@
 CFG=/etc/board.json
 
 . /usr/share/libubox/jshn.sh
+. /lib/functions/system.sh
 
 [ -s $CFG ] || /bin/board_detect || exit 1
 [ -s /etc/config/network -a -s /etc/config/system ] && exit 0
@@ -253,9 +254,22 @@ generate_static_system() {
 		add_list system.ntp.server='3.openwrt.pool.ntp.org'
 	EOF
 
+	local label_macaddr=$(get_mac_label_dt)
+	local hostname
+
+	if json_is_a system object; then
+		json_select system
+			[ -n "$label_macaddr" ] || json_get_var label_macaddr label_macaddr
+		json_select ..
+	fi
+
+	if [ -n "$label_macaddr" ]; then
+		hostname="OpenWrt-$(macaddr_geteui $label_macaddr)"
+		uci -q set "system. at system[-1].hostname=$hostname"
+	fi
+
 	if json_is_a system object; then
 		json_select system
-			local hostname
 			if json_get_var hostname hostname; then
 				uci -q set "system. at system[-1].hostname=$hostname"
 			fi
-- 
2.20.1


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