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

NAME
       ustat - 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 struc-
       ture 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  imple-
       mented 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
       statfs(2), stat(2)

Linux 1.3.16              9 August 1995                         1