Arma 3: Add headless client functionality (#356)

arma3runhc.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+# Arguments: [number_clients] [server_binding] [server_port] "<server_password>" "<mod_list>"
+
+netcommand="$(command -v "ss" >/dev/null 2>&1 && echo "ss" || echo "netstat")"
+
+# Check if any headless clients are to be run
+# If none, immediately exit
+[[ $1 -eq 0 ]] && exit 0
+
+# Check if server starts successfully within 3 minutes
+# If not, exit
+server_started=false
+for i in $(seq 1 180); do
+  if $netcommand -uln | grep -q ":$3 "; then
+    server_started=true
+    break
+  fi
+  sleep 1
+done
+if ! $server_started; then
+  exit 1
+fi
+
+# Start the headless clients
+baseport=$(($3 + 498))
+export LD_LIBRARY_PATH=$(dirname "$0")/linux64:$LD_LIBRARY_PATH
+cd ./arma3/233780
+for i in $(seq 1 "$1"); do
+  if [[ "$2" == "0.0.0.0" ]]; then
+    connect="127.0.0.1"
+  else
+    connect="$2"
+  fi
+  ./arma3server_x64 -client -nosound -connect=$connect:$3 -port=$baseport -password="$4" "-mod=$5" >/dev/null 2>&1 &
+  clients+=($!)
+done
+
+# Monitor server process and terminate headless clients
+# when server terminates
+trap 'kill "${clients[@]}" >/dev/null 2>&1' SIGTERM
+while true; do
+  if ! $netcommand -uln | grep -q ":$3 "; then
+    for client in "${clients[@]}"; do
+      kill "$client" >/dev/null 2>&1
+    done
+    exit 0
+  fi
+  sleep 1
+done