Function print_uptime

src/uptime.c:39–118

  proper_name ("Kaveh Ghazi")

static int
print_uptime (idx_t n, STRUCT_UTMP const *utmp_buf)
{
  int status = EXIT_SUCCESS;
  time_t boot_time = 0;

  /* Loop through all the utmp entries we just read and count up the valid
     ones, also in the process possibly gleaning boottime. */
  idx_t entries = 0;
  for (idx_t i = 0; i < n; i++)
    {
      STRUCT_UTMP const *this = &utmp_buf[i];
      entries += IS_USER_PROCESS (this);
      if (UT_TYPE_BOOT_TIME (this))
        boot_time = this->ut_ts.tv_sec;
    }
  /* The gnulib module 'readutmp' is supposed to provide a BOOT_TIME entry
     on all platforms.  */
  if (boot_time == 0)
    {
      error (0, errno, _("couldn't get boot time"));
      status = EXIT_FAILURE;
    }

  time_t time_now = time (NULL);
  struct tm *tmn = time_now == (time_t) -1 ? NULL : localtime (&time_now);
  /* procps' version of uptime also prints the seconds field, but
     previous versions of coreutils don't. */
  if (tmn)
    /* TRANSLATORS: This prints the current clock time. */
    fprintftime (stdout, _(" %H:%M:%S  "), tmn, (timezone_t) 0, 0);
  else
    {
      printf (_(" ??:????  "));
      status = EXIT_FAILURE;
    }

  intmax_t uptime;
  if (time_now == (time_t) -1 || boot_time == 0
      || ckd_sub (&uptime, time_now, boot_time) || uptime < 0)
    {
      printf (_("up ???? days ??:??,  "));
      status = EXIT_FAILURE;
    }
  else
    {
      intmax_t updays = uptime / 86400;
      int uphours = uptime % 86400 / 3600;
      int upmins = uptime % 86400 % 3600 / 60;
      if (0 < updays)
        printf (ngettext ("up %jd day %2d:%02d,  ",
                          "up %jd days %2d:%02d,  ",
                          select_plural (updays)),
                updays, uphours, upmins);
      else
        printf (_("up  %2d:%02d,  "), uphours, upmins);
    }