diff --git a/v4l2/t.c b/v4l2/t.c
index bf537fa..2edc5a6 100644
--- a/v4l2/t.c
+++ b/v4l2/t.c
@@ -20,9 +20,9 @@
 int		verbosity;
 
 /* --------------------------------------------------------------------- */
-int essai(char *dev, int k)
+int essai_get_fmt(char *dev, int k)
 {
-int				vfd, foo;
+int				vfd, idx, foo;
 struct v4l2_format		fmt;
 struct v4l2_requestbuffers      reqbuf;
 
@@ -31,20 +31,22 @@ fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, dev, k);
 vfd = open_device(dev);
 if (verbosity) fprintf(stderr, "\topen %s -> %d\n", dev, vfd);
 
-memset(&fmt, 0, sizeof(fmt));
-fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-
-foo = ioctl(vfd, VIDIOC_G_FMT, &fmt);
-fprintf(stderr, "ioctl -> %d\n", foo);
-if (0 != foo)	{
-	perror("ioctl G_FMT");
-	exit(1);
-	}
+	memset(&fmt, 0, sizeof(fmt));
+	fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	foo = ioctl(vfd, VIDIOC_G_FMT, &fmt);
+	fprintf(stderr, "%s : ioctl -> %d\n", __func__, foo);
+	if (0 != foo)	{
+		perror("ioctl G_FMT");
+		return -1;
+		}
 
 pr_v4l2_format("after ioctl VIDIOC_G_FMT", &fmt);
 
 /* this function is bugged */
 
+close(vfd);
+
+
 return k;
 }
 /* --------------------------------------------------------------------- */
@@ -79,7 +81,7 @@ while ((opt = getopt(argc, argv, "d:hK:v")) != -1) {
 
 if (verbosity) fimg_print_version(0);
 
-foo = essai(device, K);
+foo = essai_get_fmt(device, K);
 fprintf(stderr, "\tessai -> %d\n", foo);
 
 return 0;