1 /*
2 * Copyright (c) 2010, The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google, Inc. nor the names of its contributors
15 * may be used to endorse or promote products derived from this
16 * software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/time.h>
33 #include <linux/ioctl.h>
34 #include <linux/rtc.h>
35 #include <linux/android_alarm.h>
36 #include <fcntl.h>
37 #include <stdio.h>
38 #include <time.h>
39
40
format_time(int time,char * buffer)41 static void format_time(int time, char* buffer) {
42 int seconds, minutes, hours, days;
43
44 seconds = time % 60;
45 time /= 60;
46 minutes = time % 60;
47 time /= 60;
48 hours = time % 24;
49 days = time / 24;
50
51 if (days > 0)
52 sprintf(buffer, "%d days, %02d:%02d:%02d", days, hours, minutes, seconds);
53 else
54 sprintf(buffer, "%02d:%02d:%02d", hours, minutes, seconds);
55 }
56
elapsedRealtime()57 int64_t elapsedRealtime()
58 {
59 struct timespec ts;
60 int fd, result;
61
62 fd = open("/dev/alarm", O_RDONLY);
63 if (fd < 0)
64 return fd;
65
66 result = ioctl(fd, ANDROID_ALARM_GET_TIME(ANDROID_ALARM_ELAPSED_REALTIME), &ts);
67 close(fd);
68
69 if (result == 0)
70 return ts.tv_sec;
71 return -1;
72 }
73
uptime_main(int argc,char * argv[])74 int uptime_main(int argc, char *argv[])
75 {
76 float up_time, idle_time;
77 char up_string[100], idle_string[100], sleep_string[100];
78 int elapsed;
79 struct timespec up_timespec;
80
81 FILE* file = fopen("/proc/uptime", "r");
82 if (!file) {
83 fprintf(stderr, "Could not open /proc/uptime\n");
84 return -1;
85 }
86 if (fscanf(file, "%*f %f", &idle_time) != 1) {
87 fprintf(stderr, "Could not parse /proc/uptime\n");
88 fclose(file);
89 return -1;
90 }
91 fclose(file);
92
93 if (clock_gettime(CLOCK_MONOTONIC, &up_timespec) < 0) {
94 fprintf(stderr, "Could not get monotonic time\n");
95 return -1;
96 }
97 up_time = up_timespec.tv_sec + up_timespec.tv_nsec / 1e9;
98
99 elapsed = elapsedRealtime();
100 if (elapsed < 0) {
101 fprintf(stderr, "elapsedRealtime failed\n");
102 return -1;
103 }
104
105 format_time(elapsed, up_string);
106 format_time((int)idle_time, idle_string);
107 format_time((int)(elapsed - up_time), sleep_string);
108 printf("up time: %s, idle time: %s, sleep time: %s\n", up_string, idle_string, sleep_string);
109
110 return 0;
111 }
112