Colony » Colony Scout » Colony Scout OS

/*

 * Copyright (c) 2005-2006, Kohsuke Ohtani

 * All rights reserved.

 *

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

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

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

 * 2. 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.

 * 3. Neither the name of the author nor the names of any co-contributors

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

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/prex.h>

extern void        (*__cleanup)(void);        /* in exit() */

void __console_write(char *, size_t);

char __console_read(void);

static device_t __console_dev;

static int init_done = 0;

static void

__stdio_exit(void)

{

        if (__console_dev)

                device_close(__console_dev);

        init_done = 0;

}

static void

__stdio_init(void)

{

        device_open("tty", 0, &__console_dev);

        __cleanup = __stdio_exit;

        init_done = 1;

}

void

__console_write(char *buf, size_t len)

{

        if (init_done == 0)

                __stdio_init();

        device_write(__console_dev, buf, &len, 0);

}

char

__console_read(void)

{

        char ch;

        size_t len = 1;

        if (init_done == 0)

                __stdio_init();

        device_read(__console_dev, &ch, &len, 0);

        return ch;

}