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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta name="generator" content="HTML Tidy, see www.w3.org"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 --><!-- Copyright (c) 2001-2003 The Open Group, All Rights Reserved --><title><sys/statvfs.h></title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../../jscript/dotcode.js"></script><basefont size="3"> <a name="<sys/statvfs.h>"></a> <a name="tag_13_63"></a><!-- <sys/statvfs.h> --> <!--header start--><center><font size="2">The Open Group Base Specifications Issue 6<br>IEEE Std 1003.1, 2003 Edition<br>Copyright © 2001-2003 The IEEE and The Open Group, All Rights reserved.</font></center><!--header end--><hr size="2" noshade><h4><a name="tag_13_63_01"></a>NAME</h4><blockquote>sys/statvfs.h - VFS File System information structure</blockquote><h4><a name="tag_13_63_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><div class="box"><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> #include <sys/statvfs.h> <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></tt></div></blockquote><h4><a name="tag_13_63_03"></a>DESCRIPTION</h4><blockquote><p>The <i><sys/statvfs.h></i> header shall define the <b>statvfs</b> structure that includes at least the followingmembers:</p><pre><tt>unsigned long f_bsize </tt> File system block size. <tt>unsigned long f_frsize </tt> Fundamental file system block size. <tt>fsblkcnt_t f_blocks </tt> Total number of blocks on file system in units of <i>f_frsize.</i> <tt>fsblkcnt_t f_bfree </tt> Total number of free blocks. <tt>fsblkcnt_t f_bavail </tt> Number of free blocks available to <tt> </tt> non-privileged process. <tt>fsfilcnt_t f_files </tt> Total number of file serial numbers. <tt>fsfilcnt_t f_ffree </tt> Total number of free file serial numbers. <tt>fsfilcnt_t f_favail </tt> Number of file serial numbers available to <tt> </tt> non-privileged process. <tt>unsigned long f_fsid </tt> File system ID. <tt>unsigned long f_flag </tt> Bit mask of <i>f_flag</i> values. <tt>unsigned long f_namemax </tt> Maximum filename length. <tt></tt></pre><p>The <b>fsblkcnt_t</b> and <b>fsfilcnt_t</b> types shall be defined as described in <a href="../sys/types.h.html#tag_13_67"><i><sys/types.h></i></a> .</p><p>The following flags for the <i>f_flag</i> member shall be defined:</p><dl compact><dt>ST_RDONLY</dt><dd>Read-only file system.</dd><dt>ST_NOSUID</dt><dd>Does not support the semantics of the ST_ISUID and ST_ISGID file mode bits.</dd></dl><p>The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.</p><pre><tt>int statvfs(const char *restrict, struct statvfs *restrict);int fstatvfs(int, struct statvfs *);</tt></pre></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_13_63_04"></a>APPLICATION USAGE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_63_05"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_63_06"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_63_07"></a>SEE ALSO</h4><blockquote><p><a href="../sys/types.h.html#tag_13_67"><i><sys/types.h></i></a> , the System Interfaces volume ofIEEE Std 1003.1-2001, <a href="../../functions/fstatvfs.html"><i>fstatvfs</i>()</a>, <a href="../../functions/statvfs.html"><i>statvfs</i>()</a></p></blockquote><h4><a name="tag_13_63_08"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 4, Version 2.</p></blockquote><h4><a name="tag_13_63_09"></a>Issue 5</h4><blockquote><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>; thetype 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></blockquote><h4><a name="tag_13_63_10"></a>Issue 6</h4><blockquote><p>The Open Group Corrigendum U035/5 is applied. In the DESCRIPTION, the types <b>fsblkcnt_t</b> and <b>fsfilcnt_t</b> have beendescribed.</p><p>The <b>restrict</b> keyword is added to the prototype for <a href="../../functions/statvfs.html"><i>statvfs</i>()</a>.</p><p>IEEE Std 1003.1-2001/Cor 1-2002, item XBD/TC1/D6/18 is applied, changing the description of ST_NOSUID from ``Does notsupport <a href="../../functions/setuid.html"><i>setuid</i>()</a>/ <a href="../../functions/setgid.html"><i>setgid</i>()</a>semantics'' to ``Does not support the semantics of the ST_ISUID and ST_ISGID file mode bits''.</p></blockquote><div class="box"><em>End of informative text.</em></div><hr><hr size="2" noshade><center><font size="2"><!--footer start-->UNIX ® is a registered Trademark of The Open Group.<br>POSIX ® is a registered Trademark of The IEEE.<br>[ <a href="../../mindex.html">Main Index</a> | <a href="../../basedefs/contents.html">XBD</a> | <a href="../../utilities/contents.html">XCU</a> | <a href="../../functions/contents.html">XSH</a> | <a href="../../xrat/contents.html">XRAT</a> ]</font></center><!--footer end--><hr size="2" noshade></body></html>⌨️ 快捷键说明
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