tests: Adjust testsuite return codes to automake guidelines

As per the manual[1]:

"When no test protocol is in use, an exit status of 0 from a test script
will denote a success, an exit status of 77 a skipped test, an exit
status of 99 a hard error, and any other exit status will denote a
failure."

[1] https://www.gnu.org/software/automake/manual/html_node/Scripts_002dbased-Testsuites.html

Signed-off-by: Phil Sutter <phil@nwl.cc>

1 files changed, 1 insertions, 1 deletions

diff --git a/iptables-test.py b/iptables-test.py
index dc031c2b..de1e1e95 100755
--- a/iptables-test.py
+++ b/iptables-test.py
@@ -579,7 +579,7 @@ def main():
 
     if os.getuid() != 0:
         print("You need to be root to run this, sorry", file=sys.stderr)
-        return
+        return 77
 
     if not args.netns and not args.no_netns and not spawn_netns():
         print("Cannot run in own namespace, connectivity might break",