NAME

       ustat - get filesystem statistics

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

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

       [[deprecated]] int ustat(dev_t dev, struct ustat *ubuf);

DESCRIPTION

       ustat()  returns  information  about  a  mounted filesystem.  dev is a device number identifying a device
       containing a mounted filesystem.  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 to indicate the error.

ERRORS

       EFAULT ubuf points outside of your accessible address space.

       EINVAL dev does not refer to a device containing a mounted filesystem.

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

STANDARDS

       None.

HISTORY

       SVr4.  Removed in glibc 2.28.

       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 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)