rrd based system stats
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  1. /***************************************************************************
  2. * Copyright (C) 06/2006 by Olaf Rempel *
  3. * razzor@kopf-tisch.de *
  4. * *
  5. * This program is free software; you can redistribute it and/or modify *
  6. * it under the terms of the GNU General Public License as published by *
  7. * the Free Software Foundation; either version 2 of the License, or *
  8. * (at your option) any later version. *
  9. * *
  10. * This program is distributed in the hope that it will be useful, *
  11. * but WITHOUT ANY WARRANTY; without even the implied warranty of *
  12. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
  13. * GNU General Public License for more details. *
  14. * *
  15. * You should have received a copy of the GNU General Public License *
  16. * along with this program; if not, write to the *
  17. * Free Software Foundation, Inc., *
  18. * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
  19. ***************************************************************************/
  20. #include <stdio.h>
  21. #include <stdlib.h>
  22. #include "logging.h"
  23. #include "plugins.h"
  24. #include "probe.h"
  25. struct sammler_plugin plugin;
  26. static const char *ds_def = {
  27. "DS:entropy:GAUGE:15:0:U "
  28. };
  29. static const char * get_ds(int ds_id)
  30. {
  31. return ds_def;
  32. }
  33. static int probe(void)
  34. {
  35. FILE *fp = fopen("/proc/sys/kernel/random/entropy_avail", "r");
  36. if (fp == NULL) {
  37. log_print(LOG_WARN, "plugin random: fopen()");
  38. return -1;
  39. }
  40. int entropy;
  41. if (fscanf(fp, "%d", &entropy) != 1) {
  42. log_print(LOG_WARN, "plugin random: fopen()");
  43. fclose(fp);
  44. return -1;
  45. }
  46. fclose(fp);
  47. probe_submit(&plugin, "random.rrd", 0, "%d", entropy);
  48. return 0;
  49. }
  50. struct sammler_plugin plugin = {
  51. .name = "random",
  52. .interval = 10,
  53. .probe = &probe,
  54. .get_ds = &get_ds,
  55. };