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Changes to manual/html_node/grep-Programs.html
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From: |
Karl Berry |
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Subject: |
Changes to manual/html_node/grep-Programs.html |
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Date: |
Sun, 24 May 2009 18:43:11 +0000 |
CVSROOT: /web/grep
Module name: grep
Changes by: Karl Berry <karl> 09/05/24 18:43:01
Index: manual/html_node/grep-Programs.html
===================================================================
RCS file: manual/html_node/grep-Programs.html
diff -N manual/html_node/grep-Programs.html
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ manual/html_node/grep-Programs.html 24 May 2009 18:43:00 -0000 1.1
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+<html lang="en">
+<head>
+<title>grep Programs - GNU Grep 2.5.4</title>
+<meta http-equiv="Content-Type" content="text/html">
+<meta name="description" content="GNU Grep 2.5.4">
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title="Texinfo Homepage">
+<!--
+This manual is for `grep', a pattern matching engine.
+
+Copyright (C) 1999, 2000, 2001, 2002, 2005, 2008, 2009 Free
+Software Foundation, Inc.
+
+ Permission is granted to copy, distribute and/or modify this
+ document under the terms of the GNU Free Documentation License,
+ Version 1.3 or any later version published by the Free Software
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+<a name="grep-Programs"></a>
+<p>
+Previous: <a rel="previous" accesskey="p"
href="Exit-Status.html#Exit-Status">Exit Status</a>,
+Up: <a rel="up" accesskey="u" href="Invoking.html#Invoking">Invoking</a>
+<hr>
+</div>
+
+<h3 class="section">2.4 <samp><span class="command">grep</span></samp>
Programs</h3>
+
+<p><a name="index-g_t_0040command_007bgrep_007d-programs-164"></a><a
name="index-variants-of-_0040command_007bgerp_007d-165"></a>
+<samp><span class="command">grep</span></samp> searches the named input files
+(or standard input if no files are named,
+or the file name <samp><span class="file">-</span></samp> is given)
+for lines containing a match to the given pattern.
+By default, <samp><span class="command">grep</span></samp> prints the matching
lines.
+There are four major variants of <samp><span
class="command">grep</span></samp>,
+controlled by the following options.
+
+ <dl>
+<dt>‘<samp><span
class="samp">-G</span></samp>’<dt>‘<samp><span
class="samp">--basic-regexp</span></samp>’<dd><a
name="index-g_t_002dG-166"></a><a
name="index-g_t_002d_002dbasic_002dregexp-167"></a><a
name="index-matching-basic-regular-expressions-168"></a>Interpret the pattern
as a basic regular expression (BRE).
+This is the default.
+
+ <br><dt>‘<samp><span
class="samp">-E</span></samp>’<dt>‘<samp><span
class="samp">--extended-regexp</span></samp>’<dd><a
name="index-g_t_002dE-169"></a><a
name="index-g_t_002d_002dextended_002dregexp-170"></a><a
name="index-matching-extended-regular-expressions-171"></a>Interpret the
pattern as an extended regular expression (ERE).
+(‘<samp><span class="samp">-E</span></samp>’ is specified by <span
class="sc">posix</span>.)
+
+ <br><dt>‘<samp><span
class="samp">-F</span></samp>’<dt>‘<samp><span
class="samp">--fixed-strings</span></samp>’<dd><a
name="index-g_t_002dF-172"></a><a
name="index-g_t_002d_002dfixed_002dstrings-173"></a><a
name="index-matching-fixed-strings-174"></a>Interpret the pattern as a list of
fixed strings, separated
+by newlines, any of which is to be matched.
+(‘<samp><span class="samp">-F</span></samp>’ is specified by <span
class="sc">posix</span>.)
+
+ <br><dt>‘<samp><span
class="samp">-P</span></samp>’<dt>‘<samp><span
class="samp">--perl-regexp</span></samp>’<dd><a
name="index-g_t_002dP-175"></a><a
name="index-g_t_002d_002dperl_002dregexp-176"></a><a
name="index-matching-Perl-regular-expressions-177"></a>Interpret the pattern as
a Perl regular expression.
+This is highly experimental and
+‘<samp><span class="samp">grep -P</span></samp>’ may warn of
unimplemented features.
+
+ </dl>
+
+ <p>In addition,
+two variant programs <samp><span class="command">egrep</span></samp> and
<samp><span class="command">fgrep</span></samp> are available.
+<samp><span class="command">egrep</span></samp> is the same as
‘<samp><span class="samp">grep -E</span></samp>’.
+<samp><span class="command">fgrep</span></samp> is the same as
‘<samp><span class="samp">grep -F</span></samp>’.
+Direct invocation as either
+<samp><span class="command">egrep</span></samp> or <samp><span
class="command">fgrep</span></samp> is deprecated,
+but is provided to allow historical applications
+that rely on them to run unmodified.
+
+ </body></html>
+
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