[openwrt/openwrt] base-files: add 'isup' to the wifi script

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/28e357d528edf5980a523eff497b72da8bde3d91

commit 28e357d528edf5980a523eff497b72da8bde3d91
Author: Andre Heider <a.heider at gmail.com>
AuthorDate: Wed Nov 2 08:50:20 2022 +0100

    base-files: add 'isup' to the wifi script
    
    This is a silent command that allows easy wifi up/down automation for
    scripts.
    
    It takes one or multiple devices as arguments (or all if none are passed),
    and the exit code indicates if any of those is not up.
    
    E.g.:
    wifi isup && echo "all wifi devices are up"
    wifi isup radio0 || echo "this wifi is down"
    
    Signed-off-by: Andre Heider <a.heider at gmail.com>
---
 package/base-files/files/sbin/wifi | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/package/base-files/files/sbin/wifi b/package/base-files/files/sbin/wifi
index 29585389df..a3d3206ee7 100755
--- a/package/base-files/files/sbin/wifi
+++ b/package/base-files/files/sbin/wifi
@@ -6,7 +6,7 @@
 
 usage() {
 	cat <<EOF
-Usage: $0 [config|up|down|reconf|reload|status]
+Usage: $0 [config|up|down|reconf|reload|status|isup]
 enables (default), disables or configures devices not yet configured.
 EOF
 	exit 1
@@ -21,6 +21,22 @@ ubus_wifi_cmd() {
 	ubus call network.wireless "$cmd" "$(json_dump)"
 }
 
+wifi_isup() {
+	local dev="$1"
+
+	json_load "$(ubus_wifi_cmd "status" "$dev")"
+	json_get_keys devices
+
+	for device in $devices; do
+		json_select "$device"
+			json_get_var up up
+			[ $up -eq 0 ] && return 1
+		json_select ..
+	done
+
+	return 0
+}
+
 find_net_config() {(
 	local vif="$1"
 	local cfg
@@ -245,6 +261,7 @@ case "$1" in
 	detect) wifi_detect_notice ;;
 	config) wifi_config ;;
 	status) ubus_wifi_cmd "status" "$2";;
+	isup) wifi_isup "$2"; exit $?;;
 	reload) wifi_reload "$2";;
 	reload_legacy) wifi_reload_legacy "$2";;
 	--help|help) usage;;