[PATCH] risu: Add test summary

[Sebastian Mitterle <smitterl@redhat.com>]

Currently, a successful test run finishes silently with exit code 0.
The last message on the console is "starting image" which can leave
the user wondering if they executed the commands correctly.

Now add a summary of the number of executed instructions in case
of success. Don't add that message when printing the trace to
stdout (`-t -`).

Tested:
a) master/apprentice mode
b) trace mode to file
c) trace mode to stdout

Suggested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Sebastian Mitterle <smitterl@redhat.com>
---
 risu.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/risu.c b/risu.c
index 36fc82a..740663a 100644
--- a/risu.c
+++ b/risu.c
@@ -551,6 +551,7 @@ int main(int argc, char **argv)
     struct option *longopts;
     char *shortopts;
     stack_t ss;
+    int ret;
 
     longopts = setup_options(&shortopts);
 
@@ -635,8 +636,15 @@ int main(int argc, char **argv)
     arch_init();
 
     if (ismaster) {
-        return master();
+        ret = master();
     } else {
-        return apprentice();
+        ret = apprentice();
     }
+
+    if (ret == EXIT_SUCCESS && (!trace || (trace  && strcmp(trace_fn, "-") != 0))) {
+        fprintf(stderr, "No mismatches found. Executed %zd checkpoints.\n",
+                signal_count);
+    }
+
+    return ret;
 }
-- 
2.41.0