first commit

dash/src/wait-for-wifi.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env sh
+test_ip=$1
+
+if [ -z "$test_ip" ]; then
+  echo "No test ip specified"
+  exit 1
+fi
+
+wait_for_wifi() {
+  max_retry=30
+  counter=0
+
+  ping -c 1 "$test_ip" >/dev/null 2>&1
+
+  # shellcheck disable=SC2181
+  while [ $? -ne 0 ]; do
+    [ $counter -eq $max_retry ] && echo "Couldn't connect to Wi-Fi" && exit 1
+    counter=$((counter + 1))
+
+    sleep 1
+    ping -c 1 "$test_ip" >/dev/null 2>&1
+  done
+}
+
+wait_for_wifi
+echo "Wi-Fi connected"