📄 fstat.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>fstat</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_005_302"> </a>NAME</h4><blockquote>fstat - get file status</blockquote><h4><a name = "tag_000_005_303"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="systypes.h.html">sys/types.h</a>>#include <<a href="sysstat.h.html">sys/stat.h</a>>int fstat(int <i>fildes</i>, struct stat *<i>buf</i>);</code></pre></blockquote><h4><a name = "tag_000_005_304"> </a>DESCRIPTION</h4><blockquote>The<i>fstat()</i>function obtains information about an open file associated with the filedescriptor<i>fildes</i>,and writes it to the area pointed to by<i>buf.</i><p>If _XOPEN_REALTIME is definedand has a value other than -1, and<i>fildes</i>references a shared memory object,the implementation need update in the<b>stat</b>structure pointed to by the<i>buf</i>argument only the<i>st_uid</i>,<i>st_gid</i>,<i>st_size</i>,and<i>st_mode</i>fields, and only theS_IRUSR,S_IWUSR,S_IRGRP,S_IWGRP,S_IROTH,and S_IWOTH file permission bits need be valid.<p>The<i>buf</i>argument is a pointer to a<b>stat</b>structure, as defined in<i><a href="sysstat.h.html"><sys/stat.h></a></i>,into which information is placed concerning the file.<p>The structure members<b>st_mode</b>,<b>st_ino</b>,<b>st_dev</b>,<b>st_uid</b>,<b>st_gid</b>,<b>st_atime</b>,<b>st_ctime</b>and<b>st_mtime</b>will have meaningful values for all file types defined in this document.The value of the member<b>st_nlink</b>will be set to the number of links to the file.<p>An implementation that provides additional or alternative file access controlmechanisms may, under implementation-dependent conditions, cause<i>fstat()</i>to fail.<p>The<i>fstat()</i>function updates any time-related fields as described in<b>File Times Update</b>(see the <b>XBD</b> specification, <a href="../xbd/charset.html"><b>Character Set</b> </a>),before writing into the<i>stat</i>structure.</blockquote><h4><a name = "tag_000_005_305"> </a>RETURN VALUE</h4><blockquote>Upon successful completion, 0 is returned. Otherwise, -1 is returned and<i>errno</i>is set to indicate the error.</blockquote><h4><a name = "tag_000_005_306"> </a>ERRORS</h4><blockquote>The<i>fstat()</i>function will fail if:<dl compact><dt>[EBADF]<dd>The<i>fildes</i>argument is not a valid file descriptor.<dt>[EIO]<dd>An I/O error occurred while reading from the file system.<dt>[EOVERFLOW]<dd>The file size in bytes or the number of blocks allocated to the fileor the file serial number cannot be represented correctly in thestructure pointed to by <i>buf</i>.</dl><p>The<i>fstat()</i>function may fail if:<dl compact><dt>[EOVERFLOW]<dd>One of the values is too large to store into the structure pointed to by the<i>buf</i> argument.</dl></blockquote><h4><a name = "tag_000_005_307"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_005_308"> </a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_005_309"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_005_310"> </a>SEE ALSO</h4><blockquote><i><a href="lstat.html">lstat()</a></i>,<i><a href="stat.html">stat()</a></i>,<i><a href="sysstat.h.html"><sys/stat.h></a></i>,<i><a href="systypes.h.html"><sys/types.h></a></i>.</blockquote><h4>DERIVATION</h4><blockquote>Derived from Issue 1 of the SVID.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -