.\" Copyright 2014, Heinrich Schuchardt <xypron.glpk@gmx.de>
.\" Copyright 2024, Alejandro Colomar <alx@kernel.org>
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.TH ioctl_fat 2 2024-06-14 "Linux man-pages 6.9.1"
.SH NAME
ioctl_fat \- manipulating the FAT filesystem
.SH LIBRARY
Standard C library
.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <sys/ioctl.h>
.P
.BI "int ioctl(int " fd ", unsigned long " op ", ...);"
.fi
.SH DESCRIPTION
The
.BR 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
.I op
values are available.
.SS Reading and setting file attributes
.TP
.BR FAT_IOCTL_GET_ATTRIBUTES (2const)
.TQ
.BR FAT_IOCTL_SET_ATTRIBUTES (2const)
.SS Reading the volume ID
.TP
.BR FAT_IOCTL_GET_VOLUME_ID (2const)
.SS Reading short filenames of a directory
.TP
.BR VFAT_IOCTL_READDIR_BOTH (2const)
.TQ
.BR VFAT_IOCTL_READDIR_SHORT (2const)
.SH RETURN VALUE
On success,
a nonnegative value is returned.
On error, \-1 is returned, and
.I errno
is set to indicate the error.
.SH ERRORS
.TP
.B ENOTTY
The file descriptor
.I fd
does not refer to an object in a FAT filesystem.
.SH STANDARDS
Linux.
.SH SEE ALSO
.BR ioctl (2)