LXR busybox/procps/uptime.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * Mini uptime implementation for busybox
   4 *
   5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6 *
   7 * Licensed under the GPL version 2, see the file LICENSE in this tarball.
   8 */
   9
  10/* This version of uptime doesn't display the number of users on the system,
  11 * since busybox init doesn't mess with utmp.  For folks using utmp that are
  12 * just dying to have # of users reported, feel free to write it as some type
  13 * of CONFIG_FEATURE_UTMP_SUPPORT #define
  14 */
  15
  16/* getopt not needed */
  17
  18#include "libbb.h"
  19
  20#ifndef FSHIFT
  21# define FSHIFT 16              /* nr of bits of precision */
  22#endif
  23#define FIXED_1         (1<<FSHIFT)     /* 1.0 as fixed-point */
  24#define LOAD_INT(x) ((x) >> FSHIFT)
  25#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
  26
  27
  28int uptime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  29int uptime_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  30{
  31        int updays, uphours, upminutes;
  32        struct sysinfo info;
  33        struct tm *current_time;
  34        time_t current_secs;
  35
  36        time(&current_secs);
  37        current_time = localtime(&current_secs);
  38
  39        sysinfo(&info);
  40
  41        printf(" %02d:%02d:%02d up ",
  42                        current_time->tm_hour, current_time->tm_min, current_time->tm_sec);
  43        updays = (int) info.uptime / (60*60*24);
  44        if (updays)
  45                printf("%d day%s, ", updays, (updays != 1) ? "s" : "");
  46        upminutes = (int) info.uptime / 60;
  47        uphours = (upminutes / 60) % 24;
  48        upminutes %= 60;
  49        if (uphours)
  50                printf("%2d:%02d, ", uphours, upminutes);
  51        else
  52                printf("%d min, ", upminutes);
  53
  54        printf("load average: %ld.%02ld, %ld.%02ld, %ld.%02ld\n",
  55                        LOAD_INT(info.loads[0]), LOAD_FRAC(info.loads[0]),
  56                        LOAD_INT(info.loads[1]), LOAD_FRAC(info.loads[1]),
  57                        LOAD_INT(info.loads[2]), LOAD_FRAC(info.loads[2]));
  58
  59        return EXIT_SUCCESS;
  60}
  61