Changes to make upstart log performance stats to a file.

init/main.c

 /* upstart
  *
  * Copyright © 2009 Canonical Ltd.
  * Author: Scott James Remnant <scott@netsplit.com>.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2, as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
@@ skipping 224 matching lines @@
 
         /* SIGHUP instructs us to re-load our configuration */
         nih_signal_set_handler (SIGHUP, nih_signal_handler);
         NIH_MUST (nih_signal_add_handler (NULL, SIGHUP, hup_handler, NULL));
 
         /* SIGUSR1 instructs us to reconnect to D-Bus */
         nih_signal_set_handler (SIGUSR1, nih_signal_handler);
         NIH_MUST (nih_signal_add_handler (NULL, SIGUSR1, usr1_handler, NULL));
 #endif /* DEBUG */
 
+        /* Start performance logging using these hardcoded files.
+         * TODO(kmixter): We'll want to make the files and fields
+         * configurable eventually.
+         */
+        perf_log_set_files ("/proc/uptime",
+                            "/sys/block/sda/stat",
+                            "/var/log/perf.log");
+
 
         /* Watch children for events */
         NIH_MUST (nih_child_add_watch (NULL, -1, NIH_CHILD_ALL,
                                        job_process_handler, NULL));
 
         /* Process the event queue each time through the main loop */
         NIH_MUST (nih_main_loop_add_func (NULL, (NihMainLoopCb)event_poll,
                                           NULL));
 
 
@@ skipping 284 matching lines @@
                         NihError *err;
 
                         err = nih_error_get ();
                         nih_warn ("%s: %s", _("Unable to connect to the system bus"),
                                   err->message);
                         nih_free (err);
                 }
         }
 }
 #endif /* DEBUG */