Run test suite for currently active plugin by default

Try to infer current plugin if no plugin is specified.

1 files changed, 37 insertions, 3 deletions

diff --git a/tests/runner.c b/tests/runner.c
index 11470bc..0fd3aa7 100644
--- a/tests/runner.c
+++ b/tests/runner.c
@@ -6,6 +6,7 @@
 #include <string.h>
 #include <stdio.h>
 
+#define PROC_ACTIVE_PLUGIN "/proc/litmus/active_plugin"
 
 /* auto generated by Makefile */
 #include "../test_catalog.inc"
@@ -49,17 +50,50 @@ int run_tests(int* testidx, int num_tests, const char* plugin)
         return ok;
 }
 
+static int get_active_plugin(char *buf, size_t buf_size)
+{
+        FILE *f;
+        size_t nread;
+
+        f = fopen(PROC_ACTIVE_PLUGIN, "r");
+        if (f) {
+                /* proc files read in one go */
+                nread = fread(buf, sizeof(char), buf_size - 1, f);
+                fclose(f);
+
+                /* remove trailing newline */
+                if (nread > 0 && buf[nread - 1] == '\n')
+                        nread--;
+
+                /* null terminate buffer */
+                if (nread > 0) {
+                        buf[nread] = '\0';
+                        return 1;
+                }
+        }
+        return 0;
+}
+
 #define streq(s1, s2) (!strcmp(s1, s2))
 
 int main(int argc, char** argv)
 {
         int ok, i;
+        char active_plugin[256];
+        char *plugin_name = NULL;
 
         printf("** LITMUS^RT test suite.\n");
 
-        if (argc == 2) {
+        if (argc == 2)
+                plugin_name = argv[1];
+        else if (get_active_plugin(active_plugin, sizeof(active_plugin))) {
+                /* run tests for currently active plugin */
+                plugin_name = active_plugin;
+        }
+
+        if (plugin_name) {
                 for (i = 0; i < NUM_PLUGINS; i++)
-                        if (streq(testsuite[i].plugin, argv[1])) {
+                        if (streq(testsuite[i].plugin, plugin_name)) {
                                 ok = run_tests(testsuite[i].testcases,
                                                testsuite[i].num_cases,
                                                testsuite[i].plugin);
@@ -67,7 +101,7 @@ int main(int argc, char** argv)
                                        ok, testsuite[i].num_cases - ok);
                                 return ok == testsuite[i].num_cases ? 0 : 3;
                         }
-                fprintf(stderr, "** Unknown plugin: '%s'\n", argv[1]);
+                fprintf(stderr, "** Unknown plugin: '%s'\n", plugin_name);
                 return 1;
         } else {
                 fprintf(stderr, "Usage: %s <plugin name>\n", argv[0]);