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-.\" Copyright (C) 1995, Thomas K. Dyas <tdyas@eden.rutgers.edu>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\" Created 1995-08-09 Thomas K. Dyas <tdyas@eden.rutgers.edu>
-.\" Modified 1997-01-31 by Eric S. Raymond <esr@thyrsus.com>
-.\" Modified 2001-03-22 by aeb
-.\" Modified 2003-08-04 by aeb
-.\"
-.TH ustat 2 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-ustat \- get filesystem statistics
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <sys/types.h>
-.BR "#include <unistd.h>" " /* libc[45] */"
-.BR "#include <ustat.h>" " /* glibc2 */"
-.P
-.BI "[[deprecated]] int ustat(dev_t " dev ", struct ustat *" ubuf );
-.fi
-.SH DESCRIPTION
-.BR ustat ()
-returns information about a mounted filesystem.
-.I dev
-is a device number identifying a device containing
-a mounted filesystem.
-.I ubuf
-is a pointer to a
-.I ustat
-structure that contains the following
-members:
-.P
-.in +4n
-.EX
-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 */
-.EE
-.in
-.P
-The last two fields,
-.I f_fname
-and
-.IR f_fpack ,
-are not implemented and will
-always be filled with null bytes (\[aq]\e0\[aq]).
-.SH RETURN VALUE
-On success, zero is returned and the
-.I ustat
-structure pointed to by
-.I ubuf
-will be filled in.
-On error, \-1 is returned, and
-.I errno
-is set to indicate the error.
-.SH ERRORS
-.TP
-.B EFAULT
-.I ubuf
-points outside of your accessible address space.
-.TP
-.B EINVAL
-.I dev
-does not refer to a device containing a mounted filesystem.
-.TP
-.B ENOSYS
-The mounted filesystem referenced by
-.I dev
-does not support this operation,
-or any version of Linux before Linux 1.3.16.
-.SH STANDARDS
-None.
-.SH HISTORY
-SVr4.
-Removed in glibc 2.28.
-.\" SVr4 documents additional error conditions ENOLINK, ECOMM, and EINTR
-.\" but has no ENOSYS condition.
-.P
-.BR ustat ()
-is deprecated and has been provided only for compatibility.
-All new programs should use
-.BR statfs (2)
-instead.
-.SS HP-UX notes
-The HP-UX version of the
-.I ustat
-structure has an additional field,
-.IR 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
-.IR f_tinode .
-.\" Some software tries to use this in order to test whether the
-.\" underlying filesystem is NFS.
-For some filesystems, inodes are dynamically allocated.
-Such filesystems will return the current number of free inodes.
-.SH SEE ALSO
-.BR stat (2),
-.BR statfs (2)