[RFC PATCH v2 10/17] tests/tun_tap: skip if not supported

[Christian Göttsche <cgoettsche@xxxxxxxxxxxxx>]

From: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>

Signed-off-by: Christian Göttsche <cgzones@xxxxxxxxxxxxxx>
---
 tests/tun_tap/test         | 10 +++++++++-
 tests/tun_tap/tun_common.c |  2 +-
 tests/tun_tap/tun_tap.c    | 10 +++++++---
 3 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/tests/tun_tap/test b/tests/tun_tap/test
index 3daf2eb..87956c5 100755
--- a/tests/tun_tap/test
+++ b/tests/tun_tap/test
@@ -16,7 +16,15 @@ BEGIN {
         $v = " ";
     }
 
-    plan tests => 14;
+    $result = system("runcon -t test_tun_tap_t $basedir/tun_tap $v -c 2>&1");
+
+    # check for TUN/TAP support - ENOENT
+    if ( $result >> 8 eq 2 ) {
+        plan skip_all => "No TUN/TAP support";
+    }
+    else {
+        plan tests => 14;
+    }
 }
 
 ############ Test tun_socket TUN #############
diff --git a/tests/tun_tap/tun_common.c b/tests/tun_tap/tun_common.c
index 9a3c5de..86e41df 100644
--- a/tests/tun_tap/tun_common.c
+++ b/tests/tun_tap/tun_common.c
@@ -5,7 +5,7 @@ int open_dev(int *fd, char *test_str, bool verbose)
 	char *tun_dev = "/dev/net/tun";
 
 	*fd = open(tun_dev, O_RDWR);
-	if (fd < 0) {
+	if (*fd < 0) {
 		fprintf(stderr, "Failed to open device: %s\n",
 			strerror(errno));
 		return errno;
diff --git a/tests/tun_tap/tun_tap.c b/tests/tun_tap/tun_tap.c
index a3db6c9..c1b8590 100644
--- a/tests/tun_tap/tun_tap.c
+++ b/tests/tun_tap/tun_tap.c
@@ -5,6 +5,7 @@ static void print_usage(char *progname)
 	fprintf(stderr,
 		"usage:  %s [-p] [-s ] [-v]\n"
 		"Where:\n\t"
+		"-c  Check if TUN/TAP features are available.\n\t"
 		"-p  Test TAP driver, default is TUN driver.\n\t"
 		"-s  If -v, then show TUN/TAP Features.\n\t"
 		"-v  Print information.\n", progname);
@@ -16,14 +17,17 @@ int main(int argc, char *argv[])
 	char *context, *test_str;
 	int opt, result, fd, bit, count, test;
 	unsigned int features, f_switch;
-	bool verbose = false, show = false;
+	bool verbose = false, show = false, check = false;
 	struct ifreq ifr;
 
 	test = IFF_TUN;
 	test_str = "TUN";
 
-	while ((opt = getopt(argc, argv, "psv")) != -1) {
+	while ((opt = getopt(argc, argv, "cpsv")) != -1) {
 		switch (opt) {
+		case 'c':
+			check = true;
+			break;
 		case 'p':
 			test = IFF_TAP;
 			test_str = "TAP";
@@ -52,7 +56,7 @@ int main(int argc, char *argv[])
 
 	/* Start TUN/TAP */
 	result = open_dev(&fd, test_str, verbose);
-	if (result != 0)
+	if (check || result != 0)
 		exit(result);
 
 	if (verbose && show) {
-- 
2.47.1