handy timing apps for set effective user id and launching an application.

[feisty_meow.git] / nucleus / applications / utilities / time_set_effective_id.cpp

diff --git a/nucleus/applications/utilities/time_set_effective_id.cpp b/nucleus/applications/utilities/time_set_effective_id.cpp
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+++ b/nucleus/applications/utilities/time_set_effective_id.cpp
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+/*
+ * Name   : time_set_effective_id
+ * Author : Chris Koeritz
+ * Purpose:
+ *
+ *   A simple test of how long it takes to call set effective id on Unix.
+ *   For this to really work as designed, it should be run as root.
+ *
+ * Copyright (c) 2003-$now By Author.  This program is free software; you can 
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either version 2 of
+ * the License or (at your option) any later version.  This is online at:
+ *     http://www.fsf.org/copyleft/gpl.html
+ * Please send any updates to: fred@gruntose.com
+ */
+
+#include <basis/functions.h>
+#include <basis/astring.h>
+#include <structures/set.h>
+#include <timely/time_stamp.h>
+#include <application/hoople_main.h>
+#include <loggers/console_logger.h>
+#include <loggers/file_logger.h>
+#include <structures/static_memory_gremlin.h>
+
+using namespace application;
+using namespace basis;
+using namespace loggers;
+using namespace filesystem;
+using namespace textual;
+using namespace timely;
+
+#undef BASE_LOG
+#define BASE_LOG(to_print) EMERGENCY_LOG(program_wide_logger::get(), astring(to_print))
+#undef LOG
+#define LOG(to_print) CLASS_EMERGENCY_LOG(program_wide_logger::get(), astring(to_print))
+
+class time_set_effective_id : public application_shell
+{
+public:
+  time_set_effective_id() : application_shell() {}
+  DEFINE_CLASS_NAME("time_set_effective_id");
+  int execute();
+};
+
+int time_set_effective_id::execute()
+{
+  FUNCDEF("execute");
+  SETUP_COMBO_LOGGER;
+
+  int test_runs = 1000000;
+
+  time_stamp start;  // start of test.
+  for (int i = 0; i < test_runs; i++) {
+    // set effective id to fred.
+    int ret = seteuid(1008);
+    if (ret != 0) {
+      LOG("failure to change effective user id to normal user.");
+      exit(1);
+    }
+    // set effective id to root.
+    ret = seteuid(0);
+    if (ret != 0) {
+      LOG("failure to change effective user id to root.");
+      exit(1);
+    }
+  }
+  time_stamp completion_time;  // end of test.
+
+  double durat = completion_time.value() - start.value();
+  double secs = durat / 1000.0;   // convert to seconds.
+  LOG(a_sprintf("test run took %0.2f milliseconds or %0.2f seconds or %0.2f minutes.", durat, secs, secs / 60.0));
+  // divide by two because we're doing two calls above.
+  LOG(a_sprintf("individual call takes %0.0f milliseconds.", durat / double(test_runs) / 2.0));
+
+  return 0;
+}
+
+HOOPLE_MAIN(time_set_effective_id, )
+
+#ifdef __BUILD_STATIC_APPLICATION__
+  // static dependencies found by buildor_gen_deps.sh:
+#endif // __BUILD_STATIC_APPLICATION__
+