149 lines
5.2 KiB
HTML
149 lines
5.2 KiB
HTML
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<title><sys/statvfs.h></title>
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<basefont size="3"> <a name="<sys/statvfs.h>"></a> <a name="tag_13_63"></a><!-- <sys/statvfs.h> -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_13_63_01"></a>NAME</h4>
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<blockquote>sys/statvfs.h - VFS File System information structure</blockquote>
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<h4><a name="tag_13_63_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<div class="box"><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../../images/opt-start.gif" alt=
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"[Option Start]" border="0"> #include <sys/statvfs.h> <img src="../../images/opt-end.gif" alt="[Option End]" border=
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"0"></tt></div>
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</blockquote>
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<h4><a name="tag_13_63_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i><sys/statvfs.h></i> header shall define the <b>statvfs</b> structure that includes at least the following
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members:</p>
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<pre>
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<tt>unsigned long f_bsize </tt> File system block size. <tt>
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unsigned long f_frsize </tt> Fundamental file system block size. <tt>
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fsblkcnt_t f_blocks </tt> Total number of blocks on file system in units of <i>f_frsize.</i> <tt>
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fsblkcnt_t f_bfree </tt> Total number of free blocks. <tt>
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fsblkcnt_t f_bavail </tt> Number of free blocks available to <tt>
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</tt> non-privileged process. <tt>
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fsfilcnt_t f_files </tt> Total number of file serial numbers. <tt>
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fsfilcnt_t f_ffree </tt> Total number of free file serial numbers. <tt>
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fsfilcnt_t f_favail </tt> Number of file serial numbers available to <tt>
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</tt> non-privileged process. <tt>
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unsigned long f_fsid </tt> File system ID. <tt>
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unsigned long f_flag </tt> Bit mask of <i>f_flag</i> values. <tt>
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unsigned long f_namemax </tt> Maximum filename length. <tt>
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</tt>
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</pre>
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<p>The <b>fsblkcnt_t</b> and <b>fsfilcnt_t</b> types shall be defined as described in <a href=
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"../sys/types.h.html#tag_13_67"><i><sys/types.h></i></a> .</p>
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<p>The following flags for the <i>f_flag</i> member shall be defined:</p>
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<dl compact>
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<dt>ST_RDONLY</dt>
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<dd>Read-only file system.</dd>
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<dt>ST_NOSUID</dt>
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<dd>Does not support <a href="../../functions/setuid.html"><i>setuid</i>()</a>/ <a href=
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"../../functions/setgid.html"><i>setgid</i>()</a> semantics.</dd>
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</dl>
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<p>The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.</p>
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<pre>
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<tt>int statvfs(const char *restrict, struct statvfs *restrict);
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int fstatvfs(int, struct statvfs *);
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</tt>
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</pre>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_13_63_04"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_13_63_05"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_13_63_06"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_13_63_07"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="../sys/types.h.html#tag_13_67"><i><sys/types.h></i></a> , the System Interfaces volume of
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IEEE Std 1003.1-2001, <a href="../../functions/fstatvfs.html"><i>fstatvfs</i>()</a>, <a href=
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"../../functions/statvfs.html"><i>statvfs</i>()</a></p>
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</blockquote>
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<h4><a name="tag_13_63_08"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 4, Version 2.</p>
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</blockquote>
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<h4><a name="tag_13_63_09"></a>Issue 5</h4>
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<blockquote>
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<p>The type of <i>f_blocks</i>, <i>f_bfree</i>, and <i>f_bavail</i> is changed from <b>unsigned long</b> to <b>fsblkcnt_t</b>; the
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type of <i>f_files</i>, <i>f_ffree</i>, and <i>f_favail</i> is changed from <b>unsigned long</b> to <b>fsfilcnt_t</b>.</p>
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</blockquote>
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<h4><a name="tag_13_63_10"></a>Issue 6</h4>
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<blockquote>
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<p>The Open Group Corrigendum U035/5 is applied. In the DESCRIPTION, the types <b>fsblkcnt_t</b> and <b>fsfilcnt_t</b> have been
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described.</p>
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<p>The <b>restrict</b> keyword is added to the prototype for <a href="../../functions/statvfs.html"><i>statvfs</i>()</a>.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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