USTAT (2)
get file system statistics
SYNOPSIS
#include <sys/types.h>
int ustat(dev_t dev , struct ustat * ubuf );
DESCRIPTION
ustat
returns information about a mounted file system.
dev
is a device number identifying a device containing
a mounted file system.
ubuf
is a pointer to a ustat structure that contains the following
members:
7
8n 16n 32n
daddr_t f_tfree; /* Total free blocks */
ino_t f_tinode; /* Number of free inodes */
char f_fname[6]; /* Filsys name */
char f_fpack[6]; /* Filsys pack name */
The last two fields, f_fname and f_fpack, are not implemented and will
always be filled with null characters.
RETURN VALUE
On success, zero is returned and the ustat structure pointed to by
ubuf
will be filled in. On error, -1 is returned, and
errno
is set appropriately.
ERRORS
EINVAL
dev
does not refer to a device containing a mounted file system.
EFAULT
ubuf
points outside of your accessible address space.
ENOSYS
The mounted file system referenced by
dev
does not support this operation, or any version of Linux before
1.3.16.
NOTES
ustat
has only been provided for compatibility. All new programs should use
statfs (2)
instead.
CONFORMING TO
SVr4. SVr4 documents additional error conditions ENOLINK, ECOMM, and EINTR
but has no ENOSYS condition.
SEE ALSO
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