source: mainline/uspace/app/top/top.c@ dd6c71c

/*
 * Copyright (c) 2010 Stanislav Kozina
 * 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/** @addtogroup top
 * @brief Top utility.
 * @{
 */
/**
 * @file
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <io/console.h>
#include <uptime.h>
#include <task.h>
#include <thread.h>
#include <sys/time.h>
#include <load.h>
#include "screen.h"
#include "input.h"
#include "top.h"
#include "ps.h"

#define UPDATE_INTERVAL 1

#define DAY 86400
#define HOUR 3600
#define MINUTE 60

static void read_vars(data_t *target)
{
        /* Read current time */
        struct timeval time;
        if (gettimeofday(&time, NULL) != 0) {
                printf("Cannot get time of day!\n");
                exit(1);
        }
        target->hours = (time.tv_sec % DAY) / HOUR;
        target->minutes = (time.tv_sec % HOUR) / MINUTE;
        target->seconds = time.tv_sec % MINUTE;

        /* Read uptime */
        uint64_t uptime;
        get_uptime(&uptime);
        target->uptime_d = uptime / DAY;
        target->uptime_h = (uptime % DAY) / HOUR;
        target->uptime_m = (uptime % HOUR) / MINUTE;
        target->uptime_s = uptime % MINUTE;

        /* Read load */
        get_load(target->load);

        /* Read task ids */
        target->task_count = get_tasks(&target->tasks);
}

int main(int argc, char *argv[])
{
        data_t old_data;
        data_t new_data;

        /* Read initial stats */
        printf("Reading initial data...\n");
        read_vars(&old_data);
        sleep(UPDATE_INTERVAL);
        read_vars(&new_data);

        screen_init();

        /* And paint screen until death... */
        while (true) {
                char c = tgetchar(UPDATE_INTERVAL);
                if (c < 0) {
                        read_vars(&new_data);
                        print_data(&new_data);
                        continue;
                }
                switch (c) {
                        case 'q':
                                return 0;
                        default:
                                moveto(10,10);
                                printf("Unknown command: %c", c);
                                fflush(stdout);
                                break;
                }

        }

        free(new_data.tasks);
        puts("\n\n");
        fflush(stdout);
        return 0;
}

/** @}
 */