u-tools/apps/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
  28 int uptime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  29 int 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 }