61 lines
1.8 KiB
HTML
61 lines
1.8 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
|
|
<html>
|
|
<head>
|
|
<meta name="generator" content="HTML Tidy, see www.w3.org">
|
|
<meta http-equiv="Content-Type" content=
|
|
"text/html; charset=utf-8">
|
|
<title>Select command</title>
|
|
<LINK rel="stylesheet" type="text/css" href="../rzahg/ic.css">
|
|
</HEAD>
|
|
<body bgcolor="#FFFFFF">
|
|
<!-- Java sync-link -->
|
|
<SCRIPT LANGUAGE="Javascript" SRC="../rzahg/synch.js" TYPE="text/javascript"></SCRIPT>
|
|
|
|
|
|
|
|
<h2>Select command</h2>
|
|
|
|
<p>The syntax of the <strong>select</strong> command is</p>
|
|
|
|
<p><strong>select</strong> <em>name</em> <strong>[ in</strong> <em>
|
|
word</em> ... <strong>]</strong></p>
|
|
|
|
<p><strong>do</strong> <em>list</em></p>
|
|
|
|
<p><strong>done</strong></p>
|
|
|
|
<p>The <em>words</em> are expanded, generating a list of items.
|
|
If <em>word</em> is not specified, the positional parameters are
|
|
expanded. The set of expanded words is written to standard
|
|
error, each preceded by a number. The PS3 prompt is then displayed
|
|
and a line is read from standard input. If the line consists of a
|
|
number corresponding to one of the displayed words, <strong>qsh</strong>
|
|
sets the value of <em>name</em> to the word corresponding to
|
|
the number. If the line is empty, <strong>qsh</strong> displays the
|
|
list again. The REPLY variable is set to the contents of the input
|
|
line.</p>
|
|
|
|
<p><strong>qsh</strong> runs the commands in <em>list</em> until a
|
|
<a href="break.htm">break</a>, <a href="return.htm">return</a>, or
|
|
<a href="exit.htm">exit</a> command is run. <strong>select</strong>
|
|
also completes if EOF is read from standard input.
|
|
</p>
|
|
|
|
<p><strong>Examples</strong></p>
|
|
|
|
<ol>
|
|
<li>A select command to select from a list.
|
|
<pre>
|
|
PS3="Please select a number "
|
|
list="alpha beta gamma delta epsilon"
|
|
select value in $list ; do
|
|
echo Value for selection $REPLY is $value
|
|
break
|
|
done
|
|
</pre>
|
|
</li>
|
|
</ol>
|
|
|
|
</body>
|
|
</html>
|