Write-Read-Verify

#include <stdio.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>

#define HDIO_DRIVE_TASK 0x031e
#define HDIO_DRIVE_CMD  0x031f

int main(int argc, char* argv[]) {
    int fd = open(argv[1], O_RDWR);
    unsigned char args[7] = { 0xef, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00 };
    if (ioctl(fd, HDIO_DRIVE_TASK, args)) {
        printf("error\n");
    } else {
        printf("okay\n");
    }
}