serialnumber_mailbox.c

//-------------------------------------------------------------------------
//
// The MIT License (MIT)
//
// Copyright (c) 2015 Andrew Duncan
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//-------------------------------------------------------------------------

#include <fcntl.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <sys/ioctl.h>

//-------------------------------------------------------------------------

int main(void)
{
    int fd = open("/dev/vcio", 0);
    if (fd == -1)
    {
        perror("open /dev/vcio");
        exit(EXIT_FAILURE);
    }

    uint32_t property[32] =
    {
        0x00000000,
        0x00000000,
        0x00010004,
        0x00000010,
        0x00000000,
        0x00000000,
        0x00000000,
        0x00000000,
        0x00000000,
        0x00000000
    };

    property[0] = 10 * sizeof(property[0]);

    if (ioctl(fd, _IOWR(100, 0, char *), property) == -1)
    {
        perror("ioctl");
        exit(EXIT_FAILURE);
    }

    close(fd);

    uint32_t serial = property[5];
    printf("serial: %016"PRIx32"\n", serial);

    return 0;
}