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 <errno.h> 33 #include <stdio.h> 34 #include <string.h> 35 #include <time.h> 36 37 static void format_time(int time, char* buffer) { 38 int seconds = time % 60; 39 time /= 60; 40 int minutes = time % 60; 41 time /= 60; 42 int hours = time % 24; 43 int days = time / 24; 44 45 if (days > 0) { 46 sprintf(buffer, "%d day%s, %02d:%02d:%02d", days, (days == 1) ? "" : "s", hours, minutes, seconds); 47 } else { 48 sprintf(buffer, "%02d:%02d:%02d", hours, minutes, seconds); 49 } 50 } 51 52 int uptime_main(int argc __attribute__((unused)), char *argv[] __attribute__((unused))) { 53 FILE* file = fopen("/proc/uptime", "r"); 54 if (!file) { 55 fprintf(stderr, "Could not open /proc/uptime\n"); 56 return -1; 57 } 58 float idle_time; 59 if (fscanf(file, "%*f %f", &idle_time) != 1) { 60 fprintf(stderr, "Could not parse /proc/uptime\n"); 61 fclose(file); 62 return -1; 63 } 64 fclose(file); 65 66 struct timespec up_timespec; 67 if (clock_gettime(CLOCK_MONOTONIC, &up_timespec) == -1) { 68 fprintf(stderr, "Could not get monotonic time: %s\n", strerror(errno)); 69 return -1; 70 } 71 float up_time = up_timespec.tv_sec + up_timespec.tv_nsec / 1e9; 72 73 struct timespec elapsed_timespec; 74 if (clock_gettime(CLOCK_BOOTTIME, &elapsed_timespec) == -1) { 75 fprintf(stderr, "Could not get boot time: %s\n", strerror(errno)); 76 return -1; 77 } 78 int elapsed = elapsed_timespec.tv_sec; 79 80 char up_string[100], idle_string[100], sleep_string[100]; 81 format_time(elapsed, up_string); 82 format_time((int)idle_time, idle_string); 83 format_time((int)(elapsed - up_time), sleep_string); 84 printf("up time: %s, idle time: %s, sleep time: %s\n", up_string, idle_string, sleep_string); 85 86 return 0; 87 } 88
