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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>mkdir</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_001_014_1422"> </a>NAME</h4><blockquote>mkdir - make directories</blockquote><h4><a name = "tag_001_014_1423"> </a>SYNOPSIS</h4><blockquote><pre><code>mkdir <b>[</b>-p<b>][</b>-m <i>mode</i><b>]</b><i> dir</i>...</code></pre></blockquote><h4><a name = "tag_001_014_1424"> </a>DESCRIPTION</h4><blockquote>The<i>mkdir</i>utility will create the directoriesspecified by the operands, in the order specified.<p>For each<i>dir</i>operand, the<i>mkdir</i>utility will perform actions equivalent to the <b>XSH</b> specification<i><a href="../xsh/mkdir.html">mkdir()</a></i>function, called with the following arguments:<ol><p><li>The<i>dir</i>operand is used as the<i>path</i>argument.<p><li>The value of the bitwise inclusiveORofS_IRWXU,S_IRWXGandS_IRWXOis used as the<i>mode</i>argument.(If the<b>-m</b>option is specified, the<i>mode</i>option-argument overrides this default.)<p></ol></blockquote><h4><a name = "tag_001_014_1425"> </a>OPTIONS</h4><blockquote>The<i>mkdir</i>utility supports the <b>XBD</b> specification, <a href="../xbd/utilconv.html#usg"><b>Utility Syntax Guidelines</b> </a> .<p>The following options are supported:<dl compact><dt><b>-m </b><i>mode</i><dd>Set the file permission bits ofthe newly-created directory to the specified<i>mode</i>value.The<i>mode</i>option-argument will be the same as the<i>mode</i>operand defined for the<i><a href="chmod.html">chmod</a></i>utility.In the<i>symbolic_mode</i>strings, the<i>op</i>characters "+" and "-" will be interpreted relative toan assumed initial mode ofa=rwx;"+" will add permissions to the default mode, "-"will delete permissions from the default mode.<dt><b>-p</b><dd>Create any missing intermediate pathname components.For each<i>dir</i>operand that does not name an existing directory,effects equivalent to those caused by the following command will occur:<pre><code>mkdir -p -m $(umask -S),u+wx $(dirname <i>dir</i>) &&mkdir <b>[</b>-m <i>mode</i><b>]</b> <i>dir</i></code></pre>where the<b>[-m</b> <i>mode</i><b>]</b>option represents that option supplied to the original invocation of<i>mkdir</i>,if any.Each<i>dir</i>operand that names an existing directorywill be ignored without error.</dl></blockquote><h4><a name = "tag_001_014_1426"> </a>OPERANDS</h4><blockquote>The following operand is supported:<dl compact><dt><i>dir</i><dd>A pathname of a directory to be created.</dl></blockquote><h4><a name = "tag_001_014_1427"> </a>STDIN</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_1428"> </a>INPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1429"> </a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>mkdir</i>:<dl compact><dt><i>LANG</i><dd>Provide a default value for the internationalisation variablesthat are unset or null.If<i>LANG</i>is unset or null, the corresponding value from theimplementation-dependent default locale will be used.If any of the internationalisation variables contains an invalid setting, theutility will behave as if none of the variables had been defined.<dt><i>LC_ALL</i><dd>If set to a non-empty string value,override the values of all the other internationalisation variables.<dt><i>LC_CTYPE</i><dd>Determine thelocale for the interpretation of sequences of bytes of text data ascharacters (for example, single- as opposed to multi-byte charactersin arguments).<dt><i>LC_MESSAGES</i><dd>Determine the locale that should be used to affectthe format and contents of diagnosticmessages written to standard error.<dt><i>NLSPATH</i><dd>Determine the location of message cataloguesfor the processing of<i>LC_MESSAGES .</i></dl></blockquote><h4><a name = "tag_001_014_1430"> </a>ASYNCHRONOUS EVENTS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1431"> </a>STDOUT</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_1432"> </a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_1433"> </a>OUTPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1434"> </a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1435"> </a>EXIT STATUS</h4><blockquote>The following exit values are returned:<dl compact><dt>0<dd>All the specified directorieswere created successfully or the<b>-p</b>option was specified and all the specified directories now exist.<dt>>0<dd>An error occurred.</dl></blockquote><h4><a name = "tag_001_014_1436"> </a>CONSEQUENCES OF ERRORS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1437"> </a>APPLICATION USAGE</h4><blockquote>The default file mode for directories isa=rwx(777 on most systems) with selected permissions removed in accordance with thefile mode creation mask.For intermediate pathname components created by<i>mkdir</i>,the mode is the default modified byu+wxso that the subdirectories can always be created regardless of thefile mode creation mask;if different ultimate permissions are desired for the intermediatedirectories, they can be changed afterwards with<i><a href="chmod.html">chmod</a></i>.<p>Note that some of the requesteddirectories may have been created even if an error occurs.</blockquote><h4><a name = "tag_001_014_1438"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1439"> </a>FUTURE DIRECTIONS</h4><blockquote>The IEEE PASC 1003.2 Interpretations Committee has forwarded concerns aboutparts of this interface definition to the IEEE PASC Shell and Utilities Working Groupwhich is identifying the corrections.A future revision of this specification will align withIEEE Std. 1003.2b when finalised.</blockquote><h4><a name = "tag_001_014_1440"> </a>SEE ALSO</h4><blockquote><i><a href="rm.html">rm</a></i>,<i><a href="rmdir.html">rmdir</a></i>,<i><a href="umask.html">umask</a></i>,the <b>XSH</b> specification description of<i><a href="../xsh/mkdir.html">mkdir()</a></i>.</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
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