#include <machine/pcvt_ioctl.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>

void main (int argvc, char **argv)
{
    int fd, mem_fd;
    long start, len;
    unsigned char *p, s[1];
    /* int c;*/
    /*char peek[PEEK_SIZE];*/	/* handy for using gdb to dissassemble memory */

    if (argvc != 3)
    {
	fprintf(stderr, "usage: mempeek <start> <len>\n");
	exit(-1);
    }
    start = atoi(argv[1]);
    len = atol(argv[2]);
    fprintf(stderr, "start=%ld, length=%ld\n", start, len);

    /* give ourselves programmed-IO access */
    if ((fd = open ("/dev/console", O_RDONLY)) < 0)
	fd = 0;
    if (ioctl (fd, KDENABIO, 0) < 0)
	perror ("ioctl(KDENABIO)");

    /* open /dev/mem */
    if ((mem_fd = open ("/dev/mem", O_RDWR)) < 0)
    {
	perror ("can't open /dev/mem \n");
	exit(-1);
    }

    /* lseek to where we want.. */
    p = (unsigned char *) lseek (mem_fd, (off_t)start, SEEK_SET);
    if (p != start)
    {
	perror ("couldn't seek to location");
	exit(-1);
    }

    /*c = 0;*/
    while (--len)
    {
	read(mem_fd, s, 1);
	printf("%c", s[0]);
	/*peek[c++] = s[0];*/
    }

    close(mem_fd);
    close(fd);
}