perf scripts: Export a find_scripts() function

So that other perf commands/browser has a way to dig out the available
scripts info in system, this is a preparation for the script browser.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1347007349-3102-5-git-send-email-feng.tang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 56 insertions, 0 deletions

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 76577e67c3b3..1be843aa1546 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -1032,6 +1032,61 @@ static int list_available_scripts(const struct option *opt __maybe_unused,
         exit(0);
 }
 
+/*
+ * Return -1 if none is found, otherwise the actual scripts number.
+ *
+ * Currently the only user of this function is the script browser, which
+ * will list all statically runnable scripts, select one, execute it and
+ * show the output in a perf browser.
+ */
+int find_scripts(char **scripts_array, char **scripts_path_array)
+{
+        struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
+        char scripts_path[MAXPATHLEN];
+        DIR *scripts_dir, *lang_dir;
+        char lang_path[MAXPATHLEN];
+        char *temp;
+        int i = 0;
+
+        snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
+
+        scripts_dir = opendir(scripts_path);
+        if (!scripts_dir)
+                return -1;
+
+        for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
+                snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
+                         lang_dirent.d_name);
+#ifdef NO_LIBPERL
+                if (strstr(lang_path, "perl"))
+                        continue;
+#endif
+#ifdef NO_LIBPYTHON
+                if (strstr(lang_path, "python"))
+                        continue;
+#endif
+
+                lang_dir = opendir(lang_path);
+                if (!lang_dir)
+                        continue;
+
+                for_each_script(lang_path, lang_dir, script_dirent, script_next) {
+                        /* Skip those real time scripts: xxxtop.p[yl] */
+                        if (strstr(script_dirent.d_name, "top."))
+                                continue;
+                        sprintf(scripts_path_array[i], "%s/%s", lang_path,
+                                script_dirent.d_name);
+                        temp = strchr(script_dirent.d_name, '.');
+                        snprintf(scripts_array[i],
+                                (temp - script_dirent.d_name) + 1,
+                                "%s", script_dirent.d_name);
+                        i++;
+                }
+        }
+
+        return i;
+}
+
 static char *get_script_path(const char *script_root, const char *suffix)
 {
         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
index b382bd551aac..3ea74ed1b26b 100644
--- a/tools/perf/builtin.h
+++ b/tools/perf/builtin.h
@@ -36,4 +36,5 @@ extern int cmd_kvm(int argc, const char **argv, const char *prefix);
 extern int cmd_test(int argc, const char **argv, const char *prefix);
 extern int cmd_inject(int argc, const char **argv, const char *prefix);
 
+extern int find_scripts(char **scripts_array, char **scripts_path_array);
 #endif