ustat — get file system statistics
#include <sys/types.h> #include <unistd.h> /* libc[45] */ #include <ustat.h> /* glibc2 */
int
ustat( |
dev_t | dev, |
| struct ustat * | ubuf); |
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').
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.
ubuf points
outside of your accessible address space.
dev does not
refer to a device containing a mounted file system.
The mounted file system referenced by dev does not support this
operation, or any version of Linux before 1.3.16.
ustat() is deprecated and
has only been provided for compatibility. All new programs
should use statfs(2) instead.
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.
This page is part of release 2.79 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> 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 Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date.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. 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 |