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| author | Adrian Schmutzler <freifunk@adrianschmutzler.de> | 2019-08-15 15:13:21 +0200 |
|---|---|---|
| committer | Petr Štetiar <ynezz@true.cz> | 2019-09-19 23:43:27 +0200 |
| commit | 0340718863040919ecaba74b2173ed52ebc194ce (patch) | |
| tree | 3b756b31f43b2be24419b56627757f1c1afcd79a | |
| parent | 71cf4a272c9cf7d6e604e6327d0c94aeceac26e7 (diff) | |
| download | upstream-0340718863040919ecaba74b2173ed52ebc194ce.tar.gz upstream-0340718863040919ecaba74b2173ed52ebc194ce.tar.bz2 upstream-0340718863040919ecaba74b2173ed52ebc194ce.zip | |
base-files: add function to retrieve label MAC address
To refer to the MAC address on a device's label, one can
specify the alias label-mac-device in the DTS which should
point to the bearer of the corresponding MAC address.
With the function get_mac_label, the user can retrieve then
retrieve this address and use it as a value that uniquely
identifies his device.
This is severely helpful for several downstream functionalities,
e.g. define MAC addresses of custom netifs or change the SSID to
be easily recognizable.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
| -rw-r--r-- | package/base-files/files/lib/functions/system.sh | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/package/base-files/files/lib/functions/system.sh b/package/base-files/files/lib/functions/system.sh index 5084c0052b..3051ac8476 100644 --- a/package/base-files/files/lib/functions/system.sh +++ b/package/base-files/files/lib/functions/system.sh @@ -12,6 +12,16 @@ get_mac_binary() { hexdump -v -n 6 -s $offset -e '5/1 "%02x:" 1/1 "%02x"' $path 2>/dev/null } +get_mac_label() { + local basepath="/proc/device-tree" + local macdevice="$(cat "$basepath/aliases/label-mac-device" 2>/dev/null)" + local macaddr + + [ -n "$macdevice" ] && macaddr=$(get_mac_binary "$basepath/$macdevice/mac-address" 0 2>/dev/null) + [ -n "$macaddr" ] || macaddr=$(get_mac_binary "$basepath/$macdevice/local-mac-address" 0 2>/dev/null) + echo $macaddr +} + find_mtd_chardev() { local INDEX=$(find_mtd_index "$1") local PREFIX=/dev/mtd |