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
elapsedRealtimeAlarm(struct timespec * ts)57 static int elapsedRealtimeAlarm(struct timespec *ts)
58 {
59 int fd, result;
60
61 fd = open("/dev/alarm", O_RDONLY);
62 if (fd < 0)
63 return fd;
64
65 result = ioctl(fd, ANDROID_ALARM_GET_TIME(ANDROID_ALARM_ELAPSED_REALTIME), ts);
66 close(fd);
67
68 return result;
69 }
70
elapsedRealtime()71 int64_t elapsedRealtime()
72 {
73 struct timespec ts;
74
75 int result = elapsedRealtimeAlarm(&ts);
76 if (result < 0)
77 result = clock_gettime(CLOCK_BOOTTIME, &ts);
78
79 if (result == 0)
80 return ts.tv_sec;
81 return -1;
82 }
83
uptime_main(int argc,char * argv[])84 int uptime_main(int argc __attribute__((unused)),
85 char *argv[] __attribute__((unused)))
86 {
87 float up_time, idle_time;
88 char up_string[100], idle_string[100], sleep_string[100];
89 int elapsed;
90 struct timespec up_timespec;
91
92 FILE* file = fopen("/proc/uptime", "r");
93 if (!file) {
94 fprintf(stderr, "Could not open /proc/uptime\n");
95 return -1;
96 }
97 if (fscanf(file, "%*f %f", &idle_time) != 1) {
98 fprintf(stderr, "Could not parse /proc/uptime\n");
99 fclose(file);
100 return -1;
101 }
102 fclose(file);
103
104 if (clock_gettime(CLOCK_MONOTONIC, &up_timespec) < 0) {
105 fprintf(stderr, "Could not get monotonic time\n");
106 return -1;
107 }
108 up_time = up_timespec.tv_sec + up_timespec.tv_nsec / 1e9;
109
110 elapsed = elapsedRealtime();
111 if (elapsed < 0) {
112 fprintf(stderr, "elapsedRealtime failed\n");
113 return -1;
114 }
115
116 format_time(elapsed, up_string);
117 format_time((int)idle_time, idle_string);
118 format_time((int)(elapsed - up_time), sleep_string);
119 printf("up time: %s, idle time: %s, sleep time: %s\n", up_string, idle_string, sleep_string);
120
121 return 0;
122 }
123