linux open mtd

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <mtd/mtd-user.h>

int main(int argc, char *argv[]) {
    int fd;
    char buffer[512];
    ssize_t bytes_read;

    if (argc != 2) {
        fprintf(stderr, "Usage: %s <mtd-device>\n", argv[0]);
        return 1;
    }

    fd = open(argv[1], O_RDONLY);
    if (fd == -1) {
        perror("open");
        return 1;
    }

    bytes_read = read(fd, buffer, sizeof(buffer));
    if (bytes_read == -1) {
        perror("read");
        close(fd);
        return 1;
    }

    printf("Read %zd bytes from MTD device:\n", bytes_read);
    for (ssize_t i = 0; i < bytes_read; ++i) {
        printf("%02x ", (unsigned char)buffer[i]);
    }
    printf("\n");

    close(fd);
    return 0;
}

gcc -o read_mtd read_mtd.c
sudo ./read_mtd /dev/mtd0