1 /* uptime.c - Tell how long the system has been running.
2  *
3  * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
4  * Copyright 2012 Luis Felipe Strano Moraes <lfelipe@profusion.mobi>
5  * Copyright 2013 Jeroen van Rijn <jvrnix@gmail.com>
6 
7 USE_UPTIME(NEWTOY(uptime, ">0ps", TOYFLAG_USR|TOYFLAG_BIN))
8 
9 config UPTIME
10   bool "uptime"
11   default y
12   depends on TOYBOX_UTMPX
13   help
14     usage: uptime [-ps]
15 
16     Tell the current time, how long the system has been running, the number
17     of users, and the system load averages for the past 1, 5 and 15 minutes.
18 
19     -p	Pretty (human-readable) uptime
20     -s	Since when has the system been up?
21 */
22 
23 #define FOR_uptime
24 #include "toys.h"
25 
26 void uptime_main(void)
27 {
28   struct sysinfo info;
29   time_t t;
30   struct tm *tm;
31   unsigned int days, hours, minutes;
32   struct utmpx *entry;
33   int users = 0;
34 
35   // Obtain the data we need.
36   sysinfo(&info);
37   time(&t);
38 
39   // Just show the time of boot?
40   if (toys.optflags & FLAG_s) {
41     t -= info.uptime;
42     tm = localtime(&t);
43     strftime(toybuf, sizeof(toybuf), "%F %T", tm);
44     xputs(toybuf);
45     return;
46   }
47 
48   // Current time
49   tm = localtime(&t);
50   // Uptime
51   info.uptime /= 60;
52   minutes = info.uptime%60;
53   info.uptime /= 60;
54   hours = info.uptime%24;
55   days = info.uptime/24;
56 
57   if (toys.optflags & FLAG_p) {
58     int weeks = days/7;
59     days %= 7;
60 
61     xprintf("up %d week%s, %d day%s, %d hour%s, %d minute%s\n",
62         weeks, (weeks!=1)?"s":"",
63         days, (days!=1)?"s":"",
64         hours, (hours!=1)?"s":"",
65         minutes, (minutes!=1)?"s":"");
66     return;
67   }
68 
69   xprintf(" %02d:%02d:%02d up ", tm->tm_hour, tm->tm_min, tm->tm_sec);
70   if (days) xprintf("%d day%s, ", days, (days!=1)?"s":"");
71   if (hours) xprintf("%2d:%02d, ", hours, minutes);
72   else printf("%d min, ", minutes);
73 
74   // Obtain info about logged on users
75   setutxent();
76   while ((entry = getutxent())) if (entry->ut_type == USER_PROCESS) users++;
77   endutxent();
78 
79   printf(" %d user%s, ", users, (users!=1) ? "s" : "");
80   printf(" load average: %.02f, %.02f, %.02f\n", info.loads[0]/65536.0,
81     info.loads[1]/65536.0, info.loads[2]/65536.0);
82 }
83