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119 lines
3.4 KiB
C
119 lines
3.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini uptime implementation for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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/* 2011 Pere Orga <gotrunks@gmail.com>
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*
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* Added FEATURE_UPTIME_UTMP_SUPPORT flag.
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*/
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//config:config UPTIME
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//config: bool "uptime (4 kb)"
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//config: default y
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//config: help
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//config: uptime gives a one line display of the current time, how long
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//config: the system has been running, how many users are currently logged
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//config: on, and the system load averages for the past 1, 5, and 15 minutes.
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//config:
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//config:config FEATURE_UPTIME_UTMP_SUPPORT
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//config: bool "Show the number of users"
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//config: default y
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//config: depends on UPTIME && FEATURE_UTMP
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//config: help
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//config: Display the number of users currently logged on.
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//applet:IF_UPTIME(APPLET_NOEXEC(uptime, uptime, BB_DIR_USR_BIN, BB_SUID_DROP, uptime))
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//kbuild:lib-$(CONFIG_UPTIME) += uptime.o
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//usage:#define uptime_trivial_usage
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//usage: ""
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//usage:#define uptime_full_usage "\n\n"
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//usage: "Display the time since the last boot"
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//usage:
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//usage:#define uptime_example_usage
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//usage: "$ uptime\n"
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//usage: " 1:55pm up 2:30, load average: 0.09, 0.04, 0.00\n"
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#include "libbb.h"
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#ifdef __linux__
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# include <sys/sysinfo.h>
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#endif
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#ifndef FSHIFT
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# define FSHIFT 16 /* nr of bits of precision */
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#endif
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#define FIXED_1 (1 << FSHIFT) /* 1.0 as fixed-point */
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#define LOAD_INT(x) (unsigned)((x) >> FSHIFT)
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#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1 - 1)) * 100)
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int uptime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int uptime_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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{
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unsigned updays, uphours, upminutes;
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unsigned opts;
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struct sysinfo info;
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struct tm *current_time;
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time_t current_secs;
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opts = getopt32(argv, "s");
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time(¤t_secs);
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sysinfo(&info);
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if (opts) // -s
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current_secs -= info.uptime;
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current_time = localtime(¤t_secs);
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if (opts) { // -s
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printf("%04u-%02u-%02u %02u:%02u:%02u\n",
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current_time->tm_year + 1900, current_time->tm_mon + 1, current_time->tm_mday,
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current_time->tm_hour, current_time->tm_min, current_time->tm_sec
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);
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/* The above way of calculating boot time is wobbly,
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* info.uptime has only 1 second precision, which makes
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* "uptime -s" wander +- one second.
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* /proc/uptime may be better, it has 0.01s precision.
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*/
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return EXIT_SUCCESS;
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}
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printf(" %02u:%02u:%02u up ",
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current_time->tm_hour, current_time->tm_min, current_time->tm_sec
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);
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updays = (unsigned) info.uptime / (unsigned)(60*60*24);
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if (updays != 0)
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printf("%u day%s, ", updays, (updays != 1) ? "s" : "");
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upminutes = (unsigned) info.uptime / (unsigned)60;
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uphours = (upminutes / (unsigned)60) % (unsigned)24;
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upminutes %= 60;
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if (uphours != 0)
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printf("%2u:%02u", uphours, upminutes);
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else
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printf("%u min", upminutes);
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#if ENABLE_FEATURE_UPTIME_UTMP_SUPPORT
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{
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struct utmpx *ut;
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unsigned users = 0;
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while ((ut = getutxent()) != NULL) {
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if ((ut->ut_type == USER_PROCESS) && (ut->ut_user[0] != '\0'))
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users++;
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}
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printf(", %u users", users);
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}
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#endif
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printf(", load average: %u.%02u, %u.%02u, %u.%02u\n",
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LOAD_INT(info.loads[0]), LOAD_FRAC(info.loads[0]),
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LOAD_INT(info.loads[1]), LOAD_FRAC(info.loads[1]),
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LOAD_INT(info.loads[2]), LOAD_FRAC(info.loads[2]));
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return EXIT_SUCCESS;
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}
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