187 lines
6.4 KiB
HTML
187 lines
6.4 KiB
HTML
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<title>utimes</title>
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<basefont size="3"> <a name="utimes"></a> <a name="tag_03_807"></a><!-- utimes -->
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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_03_807_01"></a>NAME</h4>
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<blockquote>utimes - set file access and modification times (<b>LEGACY</b>)</blockquote>
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<h4><a name="tag_03_807_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<div class="box"><code><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 <<a href="../basedefs/sys/time.h.html">sys/time.h</a>><br>
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<br>
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int utimes(const char *</tt><i>path</i><tt>, const struct timeval</tt> <i>times[2]</i><tt>); <img src="../images/opt-end.gif" alt=
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"[Option End]" border="0"></tt></code></div>
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<tt><br>
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</tt></blockquote>
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<h4><a name="tag_03_807_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>utimes</i>() function shall set the access and modification times of the file pointed to by the <i>path</i> argument to
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the value of the <i>times</i> argument. The <i>utimes</i>() function allows time specifications accurate to the microsecond.</p>
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<p>For <i>utimes</i>(), the <i>times</i> argument is an array of <b>timeval</b> structures. The first array member represents the
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date and time of last access, and the second member represents the date and time of last modification. The times in the
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<b>timeval</b> structure are measured in seconds and microseconds since the Epoch, although rounding toward the nearest second may
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occur.</p>
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<p>If the <i>times</i> argument is a null pointer, the access and modification times of the file shall be set to the current time.
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The effective user ID of the process shall match the owner of the file, or has write access to the file or appropriate privileges
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to use this call in this manner. Upon completion, <i>utimes</i>() shall mark the time of the last file status change,
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<i>st_ctime</i>, for update.</p>
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</blockquote>
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<h4><a name="tag_03_807_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>Upon successful completion, 0 shall be returned. Otherwise, -1 shall be returned and <i>errno</i> shall be set to indicate the
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error, and the file times shall not be affected.</p>
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</blockquote>
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<h4><a name="tag_03_807_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>utimes</i>() function shall fail if:</p>
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<dl compact>
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<dt>[EACCES]</dt>
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<dd>Search permission is denied by a component of the path prefix; or the <i>times</i> argument is a null pointer and the effective
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user ID of the process does not match the owner of the file and write access is denied.</dd>
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<dt>[ELOOP]</dt>
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<dd>A loop exists in symbolic links encountered during resolution of the <i>path</i> argument.</dd>
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<dt>[ENAMETOOLONG]</dt>
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<dd>
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The length of the <i>path</i> argument exceeds {PATH_MAX} or a pathname component is longer than {NAME_MAX}.</dd>
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<dt>[ENOENT]</dt>
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<dd>A component of <i>path</i> does not name an existing file or <i>path</i> is an empty string.</dd>
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<dt>[ENOTDIR]</dt>
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<dd>A component of the path prefix is not a directory.</dd>
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<dt>[EPERM]</dt>
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<dd>The <i>times</i> argument is not a null pointer and the calling process' effective user ID has write access to the file but
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does not match the owner of the file and the calling process does not have the appropriate privileges.</dd>
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<dt>[EROFS]</dt>
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<dd>The file system containing the file is read-only.</dd>
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</dl>
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<p>The <i>utimes</i>() function may fail if:</p>
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<dl compact>
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<dt>[ELOOP]</dt>
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<dd>More than {SYMLOOP_MAX} symbolic links were encountered during resolution of the <i>path</i> argument.</dd>
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<dt>[ENAMETOOLONG]</dt>
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<dd>
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Pathname resolution of a symbolic link produced an intermediate result whose length exceeds {PATH_MAX}.</dd>
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</dl>
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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_03_807_06"></a>EXAMPLES</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_03_807_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>For applications portability, the <a href="../functions/utime.html"><i>utime</i>()</a> function should be used to set file
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access and modification times instead of <i>utimes</i>().</p>
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</blockquote>
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<h4><a name="tag_03_807_08"></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_03_807_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>This function may be withdrawn in a future version.</p>
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</blockquote>
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<h4><a name="tag_03_807_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="utime.html"><i>utime</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/sys/time.h.html"><i><sys/time.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_807_11"></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_03_807_12"></a>Issue 5</h4>
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<blockquote>
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<p>Moved from X/OPEN UNIX extension to BASE.</p>
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</blockquote>
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<h4><a name="tag_03_807_13"></a>Issue 6</h4>
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<blockquote>
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<p>This function is marked LEGACY.</p>
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<p>The DESCRIPTION is updated to avoid use of the term "must" for application requirements.</p>
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<p>The wording of the mandatory [ELOOP] error condition is updated, and a second optional [ELOOP] error condition is added.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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