ヨタの日々

_ 労

田園都市線労は急行労。5 分ほど遅延。

業務ではストレージ労。

_ [uptime]uptime 取得して 時:分 を印字

% uname -rsm
Linux 4.20.8-arch1-1-ARCH x86_64

#include <stdio.h>

int main(int ac, char** av)
{
  FILE* fp;
  double uptime;
  double idletime;
  double t;
  int h, m;

  if((fp = popen("cat /proc/uptime", "r"))) {
    fscanf(fp, "%lf%lf", &uptime, &idletime);
    fclose(fp);
    t = uptime / 3600;
    h = (int)t;
    m = (int)((t - floor(t)) * 60);
    printf("uptime: %lf %d:%d\n", uptime, h, m);
  }
  return 0;
}

% gcc uptime.c
% ./a.out ; uptime
uptime: 10309.300000 2:51
 12:25:50 up  2:51,  1 user,  load average: 0.55, 0.35, 0.43