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 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 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 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 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
