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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>unget</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_2543"> </a>NAME</h4><blockquote>unget - undo a previous get of an SCCS file (<b>DEVELOPMENT</b>)</blockquote><h4><a name = "tag_001_014_2544"> </a>SYNOPSIS</h4><blockquote><pre><code>unget <b>[</b>-ns<b>][</b>-r <i>SID</i><b>]</b><i> file</i>...</code></pre></blockquote><h4><a name = "tag_001_014_2545"> </a>DESCRIPTION</h4><blockquote>The<i>unget</i>utility reverses the effect of a<i><a href="get.html">get</a></i><b>-e</b>done prior to creating the intended newdelta.</blockquote><h4><a name = "tag_001_014_2546"> </a>OPTIONS</h4><blockquote>The<i>unget</i>utility supports the <b>XBD</b> specification, <a href="../xbd/utilconv.html#usg"><b>Utility Syntax Guidelines</b> </a> .The following options are supported:<dl compact><dt><b>-r </b><i>SID</i><dd>Uniquely identify which delta is no longer intended.(This would have been specified by<i><a href="get.html">get</a></i>as the new delta.)The use of this option is necessary only if two ormore outstanding<i><a href="get.html">get</a></i>commandsfor editing on the same SCCSfile were done by the same person(login name).<dt><b>-s</b><dd>Suppress the writing to standard outputof the intended delta's SID.<dt><b>-n</b><dd>Retain the file that was obtained by<i><a href="get.html">get</a></i>,which would normally be removed from the current directory.</dl></blockquote><h4><a name = "tag_001_014_2547"> </a>OPERANDS</h4><blockquote>The following operands are supported:<dl compact><dt><i>file</i><dd>A pathname of an existing SCCS file or a directory.If<i>file</i>is a directory,<i>unget</i>behaves as though each file in the directory werespecified as a named file,except that non-SCCS files(last component of the pathname does not begin withs.)and unreadable files are silently ignored.If a single instance<i>file</i>is specified as -,the standard input is read;each line of the standard input is taken to be the name of an SCCS fileto be processed.Non-SCCS files and unreadable files are silently ignored.</dl></blockquote><h4><a name = "tag_001_014_2548"> </a>STDIN</h4><blockquote>The standard input is a text file used only when the<i>file</i>operand is specified as -.Each line of the text file is interpreted as an SCCS pathname.</blockquote><h4><a name = "tag_001_014_2549"> </a>INPUT FILES</h4><blockquote>Any SCCS files processed are files of an unspecified format.</blockquote><h4><a name = "tag_001_014_2550"> </a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>unget</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 and input files).<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_2551"> </a>ASYNCHRONOUS EVENTS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_2552"> </a>STDOUT</h4><blockquote>The standard output consists of a line for each file, in the following format:<p><code><tt>"%s\n"</tt>, <<i>SID removed from file</i>></code><p>If there is more than one named fileor if a directory or standard input is named,each pathname is written before each of the preceding lines:<p><code><tt>"\n%s:\n"</tt>, <<i>pathname</i>></code></blockquote><h4><a name = "tag_001_014_2553"> </a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_2554"> </a>OUTPUT FILES</h4><blockquote>Any SCCS files updated are files of an unspecified format.During processing of a<i>file</i>,a locking<i>z@file</i>,as described in<i><a href="get.html">get</a></i>,and a<i>q@file</i>(a working copy of the<i>p@file</i>),may be created and deleted.The<i>p@file</i>and<i>g@file</i>,as described in<i><a href="get.html">get</a></i>,are deleted.<br></blockquote><h4><a name = "tag_001_014_2555"> </a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2556"> </a>EXIT STATUS</h4><blockquote>The following exit values are returned:<dl compact><dt>0<dd>Successful completion.<dt>>0<dd>An error occurred.</dl></blockquote><h4><a name = "tag_001_014_2557"> </a>CONSEQUENCES OF ERRORS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_2558"> </a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2559"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2560"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2561"> </a>SEE ALSO</h4><blockquote><i><a href="delta.html">delta</a></i>,<i><a href="get.html">get</a></i>,<i><a href="sact.html">sact</a></i>.<br></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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