examples/server: send a file descriptor as part of the request to the "hello" method

[project/ubus.git] / examples / server.c

diff --git a/examples/server.c b/examples/server.c
index 230048a..bfad363 100644 (file)
--- a/examples/server.c
+++ b/examples/server.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2011-2014 Felix Fietkau <nbd@openwrt.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License version 2.1
@@ -12,6 +12,7 @@
  */
 
 #include <unistd.h>
+#include <signal.h>
 
 #include <libubox/blobmsg_json.h>
 #include "libubus.h"
@@ -34,18 +35,44 @@ static const struct blobmsg_policy hello_policy[] = {
 struct hello_request {
        struct ubus_request_data req;
        struct uloop_timeout timeout;
+       int fd;
+       int idx;
        char data[];
 };
 
+static void test_hello_fd_reply(struct uloop_timeout *t)
+{
+       struct hello_request *req = container_of(t, struct hello_request, timeout);
+       char *data;
+
+       data = alloca(strlen(req->data) + 32);
+       sprintf(data, "msg%d: %s\n", ++req->idx, req->data);
+       if (write(req->fd, data, strlen(data)) < 0) {
+               close(req->fd);
+               free(req);
+               return;
+       }
+
+       uloop_timeout_set(&req->timeout, 1000);
+}
+
 static void test_hello_reply(struct uloop_timeout *t)
 {
        struct hello_request *req = container_of(t, struct hello_request, timeout);
+       int fds[2];
 
        blob_buf_init(&b, 0);
        blobmsg_add_string(&b, "message", req->data);
        ubus_send_reply(ctx, &req->req, b.head);
+
+       pipe(fds);
+       ubus_request_set_fd(ctx, &req->req, fds[0]);
        ubus_complete_deferred_request(ctx, &req->req, 0);
-       free(req);
+       close(fds[0]);
+       req->fd = fds[1];
+
+       req->timeout.cb = test_hello_fd_reply;
+       test_hello_fd_reply(t);
 }
 
 static int test_hello(struct ubus_context *ctx, struct ubus_object *obj,
@@ -172,6 +199,7 @@ int main(int argc, char **argv)
        argv += optind;
 
        uloop_init();
+       signal(SIGPIPE, SIG_IGN);
 
        ctx = ubus_connect(ubus_socket);
        if (!ctx) {