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<pre> <span class="headline">sys_statvfs.h(0P)         POSIX Pro‐
grammer’s  Manual         sys_statvfs.h(0P)</span>  </pre> <h2><a
id="PROLOG" href="#PROLOG"></a>PROLOG  &nbsp; &nbsp; &nbsp;  &nb‐
sp;        <a        href="#top_of_page"><span        class="top‐
link">top</span></a></h2><pre>
       This manual page is part of the POSIX Programmer’s Manual.
The Linux
       implementation of this interface may differ (consult the
       corresponding  Linux  manual page for details of Linux be‐
havior), or
       the interface may not be  implemented  on  Linux.   </pre>
<h2><a id="NAME" href="#NAME"></a>NAME  &nbsp; &nbsp; &nbsp; &nb‐
sp;        <a        href="#top_of_page"><span        class="top‐
link">top</span></a></h2><pre>
       sys/statvfs.h  —  VFS  File  System  information structure
</pre> <h2><a id="SYNOPSIS" href="#SYNOPSIS"></a>SYNOPSIS  &nbsp;
&nbsp;  &nbsp;  &nbsp;  <a  href="#top_of_page"><span class="top‐
link">top</span></a></h2><pre>
       #include &lt;sys/statvfs.h&gt; </pre> <h2><a  id="DESCRIP‐
TION"  href="#DESCRIPTION"></a>DESCRIPTION   &nbsp; &nbsp; &nbsp;
&nbsp;       <a       href="#top_of_page"><span       class="top‐
link">top</span></a></h2><pre>
       The  <i>&lt;sys/statvfs.h&gt;</i>  header shall define the
<b>statvfs </b>structure, which
       shall include at least the following members:

           <b>unsigned  long  f_bsize     </b>File  system  block
size.
           unsigned long f_frsize   Fundamental file system block
size.
           fsblkcnt_t    f_blocks   Total  number  of  blocks  on
file system in units of <i>f_frsize.</i>
           fsblkcnt_t    f_bfree    Total number of free blocks.
           fsblkcnt_t     f_bavail   Number of free blocks avail‐
able to
                                    non‐privileged process.
           fsfilcnt_t    f_files    Total number of  file  serial
numbers.
           fsfilcnt_t    f_ffree    Total number of free file se‐
rial numbers.
           fsfilcnt_t    f_favail   Number of file serial numbers
available to
                                    non‐privileged process.
           unsigned long f_fsid     File system ID.
           unsigned  long  f_flag      Bit  mask of <i>f_flag</i>
values.
           unsigned long f_namemax  Maximum filename length.

       The <i>&lt;sys/statvfs.h&gt;</i> header shall  define  the
<b>fsblkcnt_t </b>and <b>fsfilcnt_t</b>
       types as described in <i>&lt;sys/types.h&gt;</i>.

       The  <i>&lt;sys/statvfs.h&gt;</i>  header shall define the
following symbolic
       constants for the <i>f_flag</i> member:

       ST_RDONLY   Read‐only file system.

       ST_NOSUID   Does not support the semantics of the ST_ISUID
and
                   ST_ISGID file mode bits.

       The  following shall be declared as functions and may also
be defined
       as macros. Function prototypes shall be provided.

           <b>int fstatvfs(int, struct statvfs *);</b>
           <b>int statvfs(const char  *restrict,  struct  statvfs
*restrict);</b>

       <i>The  following  sections  are  informative.</i>  </pre>
<h2><a  id="APPLICATION_USAGE"  href="#APPLICATION_USAGE"></a>AP‐
PLICATION    USAGE     &nbsp;    &nbsp;    &nbsp;    &nbsp;    <a
href="#top_of_page"><span                             class="top‐
link">top</span></a></h2><pre>
       None.     </pre>   <h2><a   id="RATIONALE"   href="#RATIO‐
NALE"></a>RATIONALE    &nbsp;    &nbsp;    &nbsp;    &nbsp;    <a
href="#top_of_page"><span                             class="top‐
link">top</span></a></h2><pre>
       None.   </pre>  <h2><a  id="FUTURE_DIRECTIONS"  href="#FU‐
TURE_DIRECTIONS"></a>FUTURE DIRECTIONS  &nbsp; &nbsp; &nbsp; &nb‐
sp;        <a        href="#top_of_page"><span        class="top‐
link">top</span></a></h2><pre>
       None.     </pre>   <h2><a   id="SEE_ALSO"   href="#SEE_AL‐
SO"></a>SEE   ALSO     &nbsp;    &nbsp;    &nbsp;    &nbsp;    <a
href="#top_of_page"><span                             class="top‐
link">top</span></a></h2><pre>
       <a href="../man0/sys_types.h.0p.html">sys_types.h(0p)</a>

       The  System  Interfaces   volume   of   POSIX.1‐2008,   <a
href="../man3/fstatvfs.3p.html">fstatvfs(3p)</a>   </pre>  <h2><a
id="COPYRIGHT"  href="#COPYRIGHT"></a>COPYRIGHT   &nbsp;   &nbsp;
&nbsp;    &nbsp;    <a    href="#top_of_page"><span   class="top‐
link">top</span></a></h2><pre>
       Portions of this text  are  reprinted  and  reproduced  in
electronic form
       from  IEEE Std 1003.1, 2013 Edition, Standard for Informa‐
tion
       Technology ‐‐ Portable Operating System Interface (POSIX),
The Open
       Group  Base  Specifications Issue 7, Copyright (C) 2013 by
the
       Institute of Electrical and Electronics Engineers, Inc and
The Open
       Group.  (This is POSIX.1‐2008 with the 2013 Technical Cor‐
rigendum 1
       applied.) In the event of  any  discrepancy  between  this
version and
       the  original IEEE and The Open Group Standard, the origi‐
nal IEEE and
       The Open Group Standard is the referee document. The orig‐
inal
       Standard     can     be     obtained    online    at    <a
href="http://www.unix.org/online.html">http://www.unix.org/on‐
line.html</a> .

       Any typographical or formatting errors that appear in this
page are
       most likely to have been introduced during the  conversion
of the
       source  files  to  man page format. To report such errors,
see
       <a      href="https://www.kernel.org/doc/man‐pages/report‐
ing_bugs.html">https://www.kernel.org/doc/man‐pages/report‐
ing_bugs.html</a> .

<span class="footline">IEEE/The Open  Group                  2013
sys_statvfs.h(0P)</span> </pre>

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