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 @@ -0,0 +1,84 @@ +<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"> +<meta name="generator" content="makeinfo 4.13"> +<link title="Top" rel="start" href="index.html#Top"> +<link rel="up" href="Invoking.html#Invoking" title="Invoking"> +<link rel="prev" href="Exit-Status.html#Exit-Status" title="Exit Status"> +<link href="http://www.gnu.org/software/texinfo/"; rel="generator-home" 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 + Foundation; with no Invariant Sections, with no Front-Cover Texts, + and with no Back-Cover Texts. A copy of the license is included + in the section entitled ``GNU Free Documentation License''. + --> +<meta http-equiv="Content-Style-Type" content="text/css"> +<style type="text/css"><!-- + pre.display { font-family:inherit } + pre.format { font-family:inherit } + pre.smalldisplay { font-family:inherit; font-size:smaller } + pre.smallformat { font-family:inherit; font-size:smaller } + pre.smallexample { font-size:smaller } + pre.smalllisp { font-size:smaller } + span.sc { font-variant:small-caps } + span.roman { font-family:serif; font-weight:normal; } + span.sansserif { font-family:sans-serif; font-weight:normal; } +--></style> +</head> +<body> +<div class="node"> +<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> +
