daemonize: use pid_t

After report from Vitaly Shevtsov

https://libwebsockets.org/pipermail/libwebsockets/2019-January/007787.html

lib/core/context.c

@@ -47,7 +47,7 @@ lws_create_context(const struct lws_context_creation_info *info)
 	struct lws_context *context = NULL;
 	struct lws_plat_file_ops *prev;
 #ifndef LWS_NO_DAEMONIZE
-	int pid_daemon = get_daemonize_pid();
+	pid_t pid_daemon = get_daemonize_pid();
 #endif
 #if defined(LWS_WITH_NETWORK)
 	int n;
@@ -161,7 +161,7 @@ lwsl_info("context created\n");
 #ifndef LWS_NO_DAEMONIZE
 	if (pid_daemon) {
 		context->started_with_parent = pid_daemon;
-		lwsl_info(" Started with daemon pid %d\n", pid_daemon);
+		lwsl_info(" Started with daemon pid %u\n", (unsigned int)pid_daemon);
 	}
 #endif
 #if defined(__ANDROID__)

lib/core/private.h

@@ -356,7 +356,9 @@ struct lws_context {
 
 	int max_fds;
 	int count_event_loop_static_asset_handles;
-	int started_with_parent;
+#if !defined(LWS_NO_DAEMONIZE)
+	pid_t started_with_parent;
+#endif
 	int uid, gid;
 
 	int fd_random;

lib/misc/daemonize.c

@@ -28,10 +28,10 @@
 
 #include "core/private.h"
 
-unsigned int pid_daemon;
+pid_t pid_daemon;
 static char *lock_path;
 
-int get_daemonize_pid()
+pid_t get_daemonize_pid()
 {
 	return pid_daemon;
 }

lib/plat/unix/unix-service.c

@@ -199,8 +199,10 @@ lws_plat_service(struct lws_context *context, int timeout_ms)
 void
 lws_plat_service_periodic(struct lws_context *context)
 {
+#if !defined(LWS_NO_DAEMONIZE)
 	/* if our parent went down, don't linger around */
 	if (context->started_with_parent &&
 	    kill(context->started_with_parent, 0) < 0)
 		kill(getpid(), SIGTERM);
+#endif
 }

test-apps/test-server.c

@@ -371,9 +371,6 @@ int main(int argc, char **argv)
 #ifndef LWS_NO_DAEMONIZE
 		case 'D':
 			daemonize = 1;
-			#if !defined(_WIN32) && !defined(__sun)
-			syslog_options &= ~LOG_PERROR;
-			#endif
 			break;
 #endif
 		case 'u':