Check return value from uev_io_init() at runtime

Possible resource leak due to unchecked return value from uev_io_init()
found by Coverity Scan.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

api.c

@@ -364,7 +364,8 @@ int api_init(uev_ctx_t *ctx)
 	if (-1 == listen(sd, 10))
 		goto error;
 
-	return uev_io_init(ctx, &api_watcher, cb, NULL, sd, UEV_READ);
+	if (!uev_io_init(ctx, &api_watcher, cb, NULL, sd, UEV_READ))
+		return 0;
 
 error:
 	_pe("Failed intializing API socket");

inetd.c

@@ -239,7 +239,13 @@ static int spawn_socket(inetd_t *inetd)
 		}
 	}
 
-	uev_io_init(ctx, &inetd->watcher, socket_cb, inetd->svc, sd, UEV_READ);
+	if (uev_io_init(ctx, &inetd->watcher, socket_cb, inetd->svc, sd, UEV_READ)) {
+		FLOG_PERROR("Failed setting up inetd watcher for %s", inetd->name);
+		close(sd);
+		return -errno;
+	}
+
+
 	return 0;
 }
 

plugin.c

@@ -211,7 +211,8 @@ static void init_plugins(uev_ctx_t *ctx)
 	PLUGIN_ITERATOR(p, tmp) {
 		if (is_io_plugin(p)) {
 			_d("Initializing plugin %s for I/O", basename(p->name));
-			uev_io_init(ctx, &p->watcher, generic_io_cb, p, p->io.fd, p->io.flags);
+			if (uev_io_init(ctx, &p->watcher, generic_io_cb, p, p->io.fd, p->io.flags))
+				_e("Failed setting up I/O plugin %s", basename(p->name));
 		}
 	}
 }