174 lines
4.2 KiB
HTML
174 lines
4.2 KiB
HTML
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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>shift</title>
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<body bgcolor="white">
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<basefont size="3"> <a name="shift"></a> <a name="tag_04_129"></a><!-- shift -->
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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_04_129_01"></a>NAME</h4>
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<blockquote>shift - shift positional parameters</blockquote>
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<h4><a name="tag_04_129_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>shift</tt> <b>[</b><i>n</i><b>]</b></code></p>
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</blockquote>
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<h4><a name="tag_04_129_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The positional parameters shall be shifted. Positional parameter 1 shall be assigned the value of parameter (1+<i>n</i>),
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parameter 2 shall be assigned the value of parameter (2+<i>n</i>), and so on. The parameters represented by the numbers
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<tt>"$#"</tt> down to <tt>"$#-n+1"</tt> shall be unset, and the parameter <tt>'#'</tt> is updated to reflect the new number of
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positional parameters.</p>
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<p>The value <i>n</i> shall be an unsigned decimal integer less than or equal to the value of the special parameter <tt>'#'</tt> .
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If <i>n</i> is not given, it shall be assumed to be 1. If <i>n</i> is 0, the positional and special parameters are not changed.</p>
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</blockquote>
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<h4><a name="tag_04_129_04"></a>OPTIONS</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_04_129_05"></a>OPERANDS</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_04_129_06"></a>STDIN</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_04_129_07"></a>INPUT FILES</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_04_129_08"></a>ENVIRONMENT VARIABLES</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_04_129_09"></a>ASYNCHRONOUS EVENTS</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_04_129_10"></a>STDOUT</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_04_129_11"></a>STDERR</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_04_129_12"></a>OUTPUT FILES</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_04_129_13"></a>EXTENDED DESCRIPTION</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_04_129_14"></a>EXIT STATUS</h4>
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<blockquote>
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<p>The exit status is >0 if <i>n</i>>$#; otherwise, it is zero.</p>
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</blockquote>
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<h4><a name="tag_04_129_15"></a>CONSEQUENCES OF ERRORS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_04_129_16"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_04_129_17"></a>EXAMPLES</h4>
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<blockquote>
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<pre>
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<b>$</b> <tt>set a b c d e
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</tt><b>$</b> <tt>shift 2
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</tt><b>$</b> <tt>echo $*
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</tt><b>c d e</b>
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</pre>
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</blockquote>
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<h4><a name="tag_04_129_18"></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_04_129_19"></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_04_129_20"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="xcu_chap02.html#tag_02_14"><i>Special Built-In Utilities</i></a></p>
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</blockquote>
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<h4><a name="tag_04_129_21"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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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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