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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | NOTES | SEE ALSO | COLOPHON |
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FS_IOC_SETFSLABEL(2const) FS_IOC_SETFSLABEL(2const)
FS_IOC_GETFSLABEL, FS_IOC_SETFSLABEL - get or set a filesystem
label
Standard C library (libc, -lc)
#include <linux/fs.h> /* Definition of *FSLABEL* constants */
#include <sys/ioctl.h>
int ioctl(int fd, FS_IOC_GETFSLABEL, char label[FSLABEL_MAX]);
int ioctl(int fd, FS_IOC_SETFSLABEL, char label[FSLABEL_MAX]);
If a filesystem supports online label manipulation, these
ioctl(2) operations can be used to get or set the filesystem
label for the filesystem on which fd resides. The
FS_IOC_SETFSLABEL operation requires privilege (CAP_SYS_ADMIN).
On success zero is returned. On error, -1 is returned, and errno
is set to indicate the error.
Possible errors include (but are not limited to) the following:
EFAULT label references an inaccessible memory area.
EINVAL The specified label exceeds the maximum label length for
the filesystem.
ENOTTY This can appear if the filesystem does not support online
label manipulation.
EPERM The calling process does not have sufficient permissions
to set the label.
Linux.
Linux 4.18.
They were previously known as BTRFS_IOC_GET_FSLABEL and
BTRFS_IOC_SET_FSLABEL and were private to Btrfs.
The maximum string length for this interface is FSLABEL_MAX,
including the terminating null byte ('\0'). Filesystems have
differing maximum label lengths, which may or may not include the
terminating null. The string provided to FS_IOC_SETFSLABEL must
always be null-terminated, and the string returned by
FS_IOC_GETFSLABEL will always be null-terminated.
ioctl(2), blkid(8)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.9.1 2024-06-13 FS_IOC_SETFSLABEL(2const)
Pages that refer to this page: ioctl_fs(2)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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