path: root/procps/uptime.c (plain)
blob: 88f896af2e266907c5139ecd76657e03d343df42

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 GPLv2, see file LICENSE in this source tree.
8	*/
9
10	/* 2011 Pere Orga <gotrunks@gmail.com>
11	*
12	* Added FEATURE_UPTIME_UTMP_SUPPORT flag.
13	*/
14	//config:config UPTIME
15	//config: bool "uptime"
16	//config: default y
17	//config: select PLATFORM_LINUX #sysinfo()
18	//config: help
19	//config: uptime gives a one line display of the current time, how long
20	//config: the system has been running, how many users are currently logged
21	//config: on, and the system load averages for the past 1, 5, and 15 minutes.
22	//config:
23	//config:config FEATURE_UPTIME_UTMP_SUPPORT
24	//config: bool "Support for showing the number of users"
25	//config: default y
26	//config: depends on UPTIME && FEATURE_UTMP
27	//config: help
28	//config: Makes uptime display the number of users currently logged on.
29
30	//applet:IF_UPTIME(APPLET(uptime, BB_DIR_USR_BIN, BB_SUID_DROP))
31
32	//kbuild:lib-$(CONFIG_UPTIME) += uptime.o
33
34	//usage:#define uptime_trivial_usage
35	//usage: ""
36	//usage:#define uptime_full_usage "\n\n"
37	//usage: "Display the time since the last boot"
38	//usage:
39	//usage:#define uptime_example_usage
40	//usage: "$ uptime\n"
41	//usage: " 1:55pm up 2:30, load average: 0.09, 0.04, 0.00\n"
42
43	#include "libbb.h"
44	#ifdef __linux__
45	# include <sys/sysinfo.h>
46	#endif
47	# include <utmp.h>
48
49
50
51	#ifndef FSHIFT
52	# define FSHIFT 16 /* nr of bits of precision */
53	#endif
54	#define FIXED_1 (1 << FSHIFT) /* 1.0 as fixed-point */
55	#define LOAD_INT(x) (unsigned)((x) >> FSHIFT)
56	#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1 - 1)) * 100)
57
58
59	int uptime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
60	int uptime_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
61	{
62	unsigned updays, uphours, upminutes;
63	struct sysinfo info;
64	struct tm *current_time;
65	time_t current_secs;
66
67	time(&current_secs);
68	current_time = localtime(&current_secs);
69
70	sysinfo(&info);
71
72	printf(" %02u:%02u:%02u up ",
73	current_time->tm_hour, current_time->tm_min, current_time->tm_sec);
74	updays = (unsigned) info.uptime / (unsigned)(60*60*24);
75	if (updays)
76	printf("%u day%s, ", updays, (updays != 1) ? "s" : "");
77	upminutes = (unsigned) info.uptime / (unsigned)60;
78	uphours = (upminutes / (unsigned)60) % (unsigned)24;
79	upminutes %= 60;
80	if (uphours)
81	printf("%2u:%02u", uphours, upminutes);
82	else
83	printf("%u min", upminutes);
84
85	#if ENABLE_FEATURE_UPTIME_UTMP_SUPPORT
86	{
87	struct utmpx *ut;
88	unsigned users = 0;
89	while ((ut = getutxent()) != NULL) {
90	if ((ut->ut_type == USER_PROCESS) && (ut->ut_user[0] != '\0'))
91	users++;
92	}
93	printf(", %u users", users);
94	}
95	#endif
96
97	printf(", load average: %u.%02u, %u.%02u, %u.%02u\n",
98	LOAD_INT(info.loads[0]), LOAD_FRAC(info.loads[0]),
99	LOAD_INT(info.loads[1]), LOAD_FRAC(info.loads[1]),
100	LOAD_INT(info.loads[2]), LOAD_FRAC(info.loads[2]));
101
102	return EXIT_SUCCESS;
103	}
104