Manpage of USTAT

USTAT

Section: Linux Programmer's Manual (2)
Updated: 2003-08-04
Index
 

NAME

ustat - get filesystem 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 filesystem. devis a device number identifying a device containing a mounted filesystem. ubufis a pointer to a ustatstructure 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_fnameand f_fpack, are not implemented and will always be filled with null bytes (aq\0aq).  

RETURN VALUE

On success, zero is returned and the ustatstructure pointed to by ubufwill be filled in. On error, -1 is returned, and errnois set appropriately.  

ERRORS

EFAULT
ubufpoints outside of your accessible address space.
EINVAL
devdoes not refer to a device containing a mounted filesystem.
ENOSYS
The mounted filesystem referenced by devdoes 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 ustatstructure has an additional field, f_blksize, that is unknown elsewhere. HP-UX warns: For some filesystems, the number of free inodes does not change. Such filesystems will return -1 in the field f_tinode. For some filesystems, inodes are dynamically allocated. Such filesystems will return the current number of free inodes.  

SEE ALSO

stat(2), statfs(2)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
HP-UX notes
SEE ALSO

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Time: 22:27:41 GMT, June 20, 2016