ioctl_fat - manipulating the FAT filesystem

#include <sys/ioctl.h>
int ioctl(int fd, unsigned long op, ...);

The ioctl(2) system call can be used to read and write metadata of FAT filesystems that are not accessible using other system calls. The following op values are available.

Reading and setting file attributes

FAT_IOCTL_GET_ATTRIBUTES(2const)
FAT_IOCTL_SET_ATTRIBUTES(2const)

Reading the volume ID

FAT_IOCTL_GET_VOLUME_ID(2const)

Reading short filenames of a directory

VFAT_IOCTL_READDIR_BOTH(2const)
VFAT_IOCTL_READDIR_SHORT(2const)

On success, a nonnegative value is returned. On error, -1 is returned, and errno is set to indicate the error.

ioctl(2)