55 lines
1.9 KiB
HTML
55 lines
1.9 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<html>
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<head>
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<meta name="generator" content="HTML Tidy, see www.w3.org">
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<meta http-equiv="Content-Type" content=
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"text/html; charset=utf-8">
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<title>Other expansions</title>
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<LINK rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</HEAD>
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<body bgcolor="#FFFFFF">
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<!-- Java sync-link -->
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<SCRIPT LANGUAGE="Javascript" SRC="../rzahg/synch.js" TYPE="text/javascript"></SCRIPT>
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<h2>Field splitting</h2>
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<p>After parameter expansion, command substitution, and arithmetic
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expansion, <strong>qsh</strong> scans the results of expansions and
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substitutions that did not occur in double quotation marks for field
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splitting. Multiple fields can result.</p>
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<p><strong>qsh</strong> treats each character of the <strong>
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IFS</strong> variable as a delimiter and uses the delimiters to
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split the results of parameter expansion and command substitution
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into fields. If the value of the <strong>IFS</strong> variable is
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null, no field splitting is performed.</p>
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<h2><a name="path">Path name expansion</a></h2>
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<p>When the noglob option is not set, path name expansion is
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performed after field splitting is complete. Each word is viewed as
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a series of <a href="pattern.htm">patterns</a>, separated by slashes.
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The process of expansion replaces the word with the names of all
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existing files whose names can be formed by replacing each pattern
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with a string that matches the specified pattern. There are two
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restrictions:</p>
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<ol>
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<li>a pattern cannot match a string containing a slash</li>
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<li>a pattern cannot match a string starting with a period unless
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the first character of the pattern is a period</li>
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</ol>
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<h2>Quote removal</h2>
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<p>The quote characters, backslash (<strong>\</strong>), single
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quotation mark (<strong>`</strong>), and double quotation mark (<strong>"</strong>),
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are removed unless the character has been quoted.
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</body>
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</html>
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