184 lines
5.0 KiB
HTML
184 lines
5.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<meta name="generator" content="HTML Tidy, see www.w3.org">
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 -->
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>chdir</title>
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<body bgcolor="white">
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<basefont size="3"> <a name="chdir"></a> <a name="tag_03_69"></a><!-- chdir -->
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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_69_01"></a>NAME</h4>
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<blockquote>chdir - change working directory</blockquote>
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<h4><a name="tag_03_69_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/unistd.h.html">unistd.h</a>><br>
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<br>
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int chdir(const char *</tt><i>path</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_69_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>chdir</i>() function shall cause the directory named by the pathname pointed to by the <i>path</i> argument to become the
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current working directory; that is, the starting point for path searches for pathnames not beginning with <tt>'/'</tt> .</p>
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</blockquote>
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<h4><a name="tag_03_69_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, the current working directory shall remain
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unchanged, and <i>errno</i> shall be set to indicate the error.</p>
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</blockquote>
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<h4><a name="tag_03_69_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>chdir</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 for any component of the pathname.</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 directory 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 pathname is not a directory.</dd>
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</dl>
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<p>The <i>chdir</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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As a result of encountering a symbolic link in resolution of the <i>path</i> argument, the length of the substituted pathname
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string exceeded {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_69_06"></a>EXAMPLES</h4>
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<blockquote>
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<h5><a name="tag_03_69_06_01"></a>Changing the Current Working Directory</h5>
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<p>The following example makes the value pointed to by <b>directory</b>, <b>/tmp</b>, the current working directory.</p>
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<pre>
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<tt>#include <unistd.h>
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...
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char *directory = "/tmp";
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int ret;
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<br>
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ret = chdir (directory);
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</tt>
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</pre>
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</blockquote>
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<h4><a name="tag_03_69_07"></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_03_69_08"></a>RATIONALE</h4>
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<blockquote>
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<p>The <i>chdir</i>() function only affects the working directory of the current process.</p>
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</blockquote>
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<h4><a name="tag_03_69_09"></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_03_69_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="getcwd.html"><i>getcwd</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/unistd.h.html"><i><unistd.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_69_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 1. Derived from Issue 1 of the SVID.</p>
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</blockquote>
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<h4><a name="tag_03_69_12"></a>Issue 6</h4>
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<blockquote>
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<p>The APPLICATION USAGE section is added.</p>
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<p>The following new requirements on POSIX implementations derive from alignment with the Single UNIX Specification:</p>
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<ul>
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<li>
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<p>The [ELOOP] mandatory error condition is added.</p>
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</li>
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<li>
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<p>A second [ENAMETOOLONG] is added as an optional error condition.</p>
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</li>
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</ul>
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<p>The following changes were made to align with the IEEE P1003.1a draft standard:</p>
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<ul>
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<li>
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<p>The [ELOOP] optional error condition is added.</p>
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</li>
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</ul>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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UNIX ® is a registered Trademark of The Open Group.<br>
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POSIX ® is a registered Trademark of The IEEE.<br>
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"../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>
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