Name

ustat — get file system statistics

Synopsis

#include <sys/types.h>
#include <unistd.h>     /* libc[45] */
#include <ustat.h>      /* glibc2 */
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:

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 bytes ('\0').

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

EFAULT

ubuf points outside of your accessible address space.

EINVAL

dev does not refer to a device containing a mounted file system.

ENOSYS

The mounted file system referenced by dev does not support this operation, or any version of Linux before 1.3.16.

CONFORMING TO

SVr4.

NOTES

ustat() is deprecated and has been provided only for compatibility. All new programs should use statfs(2) instead.

HP-UX notes

The HP-UX version of the ustat structure has an additional field, f_blksize, that is unknown elsewhere. HP-UX warns: For some file systems, the number of free inodes does not change. Such file systems will return −1 in the field f_tinode. For some file systems, inodes are dynamically allocated. Such file systems will return the current number of free inodes.

SEE ALSO

stat(2), statfs(2)

COLOPHON

This page is part of release 3.52 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man−pages/.


  Copyright (C) 1995, Thomas K. Dyas <tdyaseden.rutgers.edu>

%%%LICENSE_START(VERBATIM)
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.

Since the Linux kernel and libraries are constantly changing, this
manual page may be incorrect or out-of-date.  The author(s) assume no
responsibility for errors or omissions, or for damages resulting from
the use of the information contained herein.  The author(s) may not
have taken the same level of care in the production of this manual,
which is licensed free of charge, as they might when working
professionally.

Formatted or processed versions of this manual, if unaccompanied by
the source, must acknowledge the copyright and authors of this work.
%%%LICENSE_END

Created  1995-08-09 Thomas K. Dyas <tdyaseden.rutgers.edu>
Modified 1997-01-31 by Eric S. Raymond <esrthyrsus.com>
Modified 2001-03-22 by aeb
Modified 2003-08-04 by aeb