USTAT(2)						     Linux Programmer's Manual							  USTAT(2)

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 ('').

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 only been provided 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 sys-
       tems, 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 3.44 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/.

Linux								    2003-08-04								  USTAT(2)