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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>chgrp</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_016"> </a>NAME</h4><blockquote>chgrp - change the file group ownership</blockquote><h4><a name = "tag_001_014_017"> </a>SYNOPSIS</h4><blockquote><pre><code>chgrp <b>[</b>-R<b>] </b><i>group file</i> ...</code></pre></blockquote><h4><a name = "tag_001_014_018"> </a>DESCRIPTION</h4><blockquote>The<i>chgrp</i>utility will set the group ID of the file named by each<i>file</i>operand to the group IDspecified by the<i>group</i>operand.<p>For each<i>file</i>operand,it will perform actions equivalent to the <b>XSH</b> specification<i><a href="../xsh/chown.html">chown()</a></i>function, called with the following arguments:<ul><p><li>The<i>file</i>operand will be used as the<i>path</i>argument.<p><li>The user ID of the file will be used as the<i>owner</i>argument.<p><li>The specified group ID will be used as the<i>group</i>argument.<p></ul><p>Unless<i>chgrp</i>is invoked by a process with appropriate privileges,the set-user-IDand set-group-IDbits of a regular file will be cleared upon successful completion;the set-user-IDand set-group-IDbits of other file types may be cleared.</blockquote><h4><a name = "tag_001_014_019"> </a>OPTIONS</h4><blockquote>The<i>chgrp</i>utility supports the <b>XBD</b> specification, <a href="../xbd/utilconv.html#usg"><b>Utility Syntax Guidelines</b> </a> .<p>The following option is supported:<dl compact><dt><b>-R</b><dd>Recursively change file group IDs.For each<i>file</i>operand that names a directory,<i>chgrp</i>will change the group of the directory and all filesin the file hierarchy below it.</dl></blockquote><h4><a name = "tag_001_014_020"> </a>OPERANDS</h4><blockquote>The following operands are supported:<dl compact><dt><i>group</i><dd>A group name from the group database or a numeric group ID.Either specifies a group IDto be given to each file named by one of the<i>file</i>operands.If a numeric<i>group</i>operand exists in the group database as agroup name, the group ID number associatedwith that group name is used as the group ID.<dt><i>file</i><dd>A pathname of a file whose group IDis to be modified.</dl></blockquote><h4><a name = "tag_001_014_021"> </a>STDIN</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_022"> </a>INPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_023"> </a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>chgrp</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_024"> </a>ASYNCHRONOUS EVENTS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_025"> </a>STDOUT</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_026"> </a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_027"> </a>OUTPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_028"> </a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_029"> </a>EXIT STATUS</h4><blockquote>The following exit values are returned:<dl compact><dt>0<dd>The utility executed successfully and all requested changes were made.<dt>>0<dd>An error occurred.</dl></blockquote><h4><a name = "tag_001_014_030"> </a>CONSEQUENCES OF ERRORS</h4><blockquote>If, when invoked with the<b>-R</b>option,<i>chgrp</i>attempts but fails to change the group IDof a particular file in a specified file hierarchy,it will continue to process theremaining files in the hierarchy.If<i>chgrp</i>cannot read or search adirectory within a hierarchy, it will continue to processthe other parts of the hierarchy that are accessible.</blockquote><h4><a name = "tag_001_014_031"> </a>APPLICATION USAGE</h4><blockquote>Only the owner of a file or the user with appropriate privilegesmay changethe owner or group of a file.<p>Some systems restrict the use of<i>chgrp</i>to a user with appropriate privileges when the<i>group</i>specified is not the effective group ID or one of the supplementarygroup IDs of the calling process.</blockquote><h4><a name = "tag_001_014_032"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_033"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_034"> </a>SEE ALSO</h4><blockquote><i><a href="chmod.html">chmod</a></i>,<i><a href="chown.html">chown</a></i>,the <b>XSH</b> specification description of<i><a href="../xsh/chown.html">chown()</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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