OpenBSD pledge support

main.c

@@ -1,5 +1,8 @@
 #include "mpdws.h"
 #include <stdio.h>
+#ifdef __OpenBSD__
+#include <unistd.h>
+#endif
 
 int main() {
   struct mpd_ws_server server;
@@ -14,6 +17,13 @@ int main() {
     return 1;
   }
 
+#ifdef __OpenBSD__
+  if (pledge("inet stdio", NULL) == -1) {
+    perror("pledge");
+    return 1;
+  }
+#endif
+
   /* Run main loop */
   mpd_ws_run(&server);