/* sysinfo.c by detour@metalshell.com
 *
 * Display the uptime, load averages, total ram, free ram,
 * shared ram, buffered ram, total swap, free swap, and
 * number of processes running on a linux machine.
 *
 * http://www.metalshell.com/
 *
 */

#include <sys/sysinfo.h>
#include <stdio.h>

int main() {
  int days, hours, mins;
  struct sysinfo sys_info;

  if(sysinfo(&sys_info) != 0)
    perror("sysinfo");

  // Uptime

  days = sys_info.uptime / 86400;
  hours = (sys_info.uptime / 3600) - (days * 24);
  mins = (sys_info.uptime / 60) - (days * 1440) - (hours * 60);

  printf("Uptime: %ddays, %dhours, %dminutes, %ldseconds\n",
                      days, hours, mins, sys_info.uptime % 60);

  // Load Averages for 1,5 and 15 minutes

  printf("Load Avgs: 1min(%ld) 5min(%ld) 15min(%ld)\n",
          sys_info.loads[0], sys_info.loads[1], sys_info.loads[2]);

  // Total and free ram.

  printf("Total Ram: %ldk\tFree: %ldk\n", sys_info.totalram / 1024,
                                        sys_info.freeram / 1024);

  // Shared and buffered ram.

  printf("Shared Ram: %ldk\n", sys_info.sharedram / 1024);
  printf("Buffered Ram: %ldk\n", sys_info.bufferram / 1024);

  // Swap space

  printf("Total Swap: %ldk\tFree: %ldk\n", sys_info.totalswap / 1024,
                                           sys_info.freeswap / 1024);

  // Number of processes currently running.

  printf("Number of processes: %d\n", sys_info.procs);

  return 0;
}