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 (3.7 kb)"
16 //config: default y
17 //config: help
18 //config: uptime gives a one line display of the current time, how long
19 //config: the system has been running, how many users are currently logged
20 //config: on, and the system load averages for the past 1, 5, and 15 minutes.
21 //config:
22 //config:config FEATURE_UPTIME_UTMP_SUPPORT
23 //config: bool "Show the number of users"
24 //config: default y
25 //config: depends on UPTIME && FEATURE_UTMP
26 //config: help
27 //config: Display the number of users currently logged on.
28
29 //applet:IF_UPTIME(APPLET_NOEXEC(uptime, uptime, BB_DIR_USR_BIN, BB_SUID_DROP, uptime))
30
31 //kbuild:lib-$(CONFIG_UPTIME) += uptime.o
32
33 //usage:#define uptime_trivial_usage
34 //usage: ""
35 //usage:#define uptime_full_usage "\n\n"
36 //usage: "Display the time since the last boot"
37 //usage:
38 //usage:#define uptime_example_usage
39 //usage: "$ uptime\n"
40 //usage: " 1:55pm up 2:30, load average: 0.09, 0.04, 0.00\n"
41
42 #include "libbb.h"
43 #ifdef __linux__
44 # include <sys/sysinfo.h>
45 #endif
46
47 #ifndef FSHIFT
48 # define FSHIFT 16 /* nr of bits of precision */
49 #endif
50 #define FIXED_1 (1 << FSHIFT) /* 1.0 as fixed-point */
51 #define LOAD_INT(x) (unsigned)((x) >> FSHIFT)
52 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1 - 1)) * 100)
53
54 int uptime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
uptime_main(int argc UNUSED_PARAM,char ** argv UNUSED_PARAM)55 int uptime_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
56 {
57 unsigned updays, uphours, upminutes;
58 unsigned opts;
59 struct sysinfo info;
60 struct tm *current_time;
61 time_t current_secs;
62
63 opts = getopt32(argv, "s");
64
65 time(¤t_secs);
66 sysinfo(&info);
67
68 if (opts) // -s
69 current_secs -= info.uptime;
70
71 current_time = localtime(¤t_secs);
72
73 if (opts) { // -s
74 printf("%04u-%02u-%02u %02u:%02u:%02u\n",
75 current_time->tm_year + 1900, current_time->tm_mon + 1, current_time->tm_mday,
76 current_time->tm_hour, current_time->tm_min, current_time->tm_sec
77 );
78 /* The above way of calculating boot time is wobbly,
79 * info.uptime has only 1 second precision, which makes
80 * "uptime -s" wander +- one second.
81 * /proc/uptime may be better, it has 0.01s precision.
82 */
83 return EXIT_SUCCESS;
84 }
85
86 printf(" %02u:%02u:%02u up ",
87 current_time->tm_hour, current_time->tm_min, current_time->tm_sec
88 );
89 updays = (unsigned) info.uptime / (unsigned)(60*60*24);
90 if (updays != 0)
91 printf("%u day%s, ", updays, (updays != 1) ? "s" : "");
92 upminutes = (unsigned) info.uptime / (unsigned)60;
93 uphours = (upminutes / (unsigned)60) % (unsigned)24;
94 upminutes %= 60;
95 if (uphours != 0)
96 printf("%2u:%02u", uphours, upminutes);
97 else
98 printf("%u min", upminutes);
99
100 #if ENABLE_FEATURE_UPTIME_UTMP_SUPPORT
101 {
102 struct utmpx *ut;
103 unsigned users = 0;
104 while ((ut = getutxent()) != NULL) {
105 if ((ut->ut_type == USER_PROCESS) && (ut->ut_user[0] != '\0'))
106 users++;
107 }
108 printf(", %u users", users);
109 }
110 #endif
111
112 printf(", load average: %u.%02u, %u.%02u, %u.%02u\n",
113 LOAD_INT(info.loads[0]), LOAD_FRAC(info.loads[0]),
114 LOAD_INT(info.loads[1]), LOAD_FRAC(info.loads[1]),
115 LOAD_INT(info.loads[2]), LOAD_FRAC(info.loads[2]));
116
117 return EXIT_SUCCESS;
118 }
119