получить или установить метку файловой системы (get or set a filesystem label)
Имя (Name)
ioctl_fslabel - get or set a filesystem label
Синопсис (Synopsis)
#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]);
Описание (Description)
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).
Возвращаемое значение (Return value)
On success zero is returned. On error, -1 is returned, and errno
is set to indicate the error.
Ошибки (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.
Версии (Versions)
These ioctl(2) operations first appeared in Linux 4.18. They
were previously known as BTRFS_IOC_GET_FSLABEL and
BTRFS_IOC_SET_FSLABEL and were private to Btrfs.
Стандарты (Conforming to)
This API is Linux-specific.
Примечание (Note)
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.
Смотри также (See also)
ioctl(2), blkid(8)
