Lose uptime to toybox.

    start \

    stop \

    top \

    uptime \

ALL_TOOLS = $(BSD_TOOLS) $(OUR_TOOLS)

/*

 * Copyright (c) 2010, The Android Open Source Project

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *  * Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 *  * Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *  * Neither the name of Google, Inc. nor the names of its contributors

 *    may be used to endorse or promote products derived from this

 *    software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS

 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT

 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#include <errno.h>

#include <stdio.h>

#include <string.h>

#include <time.h>

static void format_time(int time, char* buffer) {

    int seconds = time % 60;

    time /= 60;

    int minutes = time % 60;

    time /= 60;

    int hours = time % 24;

    int days = time / 24;

    if (days > 0) {

        sprintf(buffer, "%d day%s, %02d:%02d:%02d", days, (days == 1) ? "" : "s", hours, minutes, seconds);

    } else {

        sprintf(buffer, "%02d:%02d:%02d", hours, minutes, seconds);

    }

}

int uptime_main(int argc __attribute__((unused)), char *argv[] __attribute__((unused))) {

    FILE* file = fopen("/proc/uptime", "r");

    if (!file) {

        fprintf(stderr, "Could not open /proc/uptime\n");

        return -1;

    }

    float idle_time;

    if (fscanf(file, "%*f %f", &idle_time) != 1) {

        fprintf(stderr, "Could not parse /proc/uptime\n");

        fclose(file);

        return -1;

    }

    fclose(file);

    struct timespec up_timespec;

    if (clock_gettime(CLOCK_MONOTONIC, &up_timespec) == -1) {

        fprintf(stderr, "Could not get monotonic time: %s\n", strerror(errno));

	return -1;

    }

    float up_time = up_timespec.tv_sec + up_timespec.tv_nsec / 1e9;

    struct timespec elapsed_timespec;

    if (clock_gettime(CLOCK_BOOTTIME, &elapsed_timespec) == -1) {

        fprintf(stderr, "Could not get boot time: %s\n", strerror(errno));

        return -1;

    }

    int elapsed = elapsed_timespec.tv_sec;

    char up_string[100], idle_string[100], sleep_string[100];

    format_time(elapsed, up_string);

    format_time((int)idle_time, idle_string);

    format_time((int)(elapsed - up_time), sleep_string);

    printf("up time: %s, idle time: %s, sleep time: %s\n", up_string, idle_string, sleep_string);

    return 0;

}