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Changes to grep/manual/html_node/Other-Options.html,v
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From: |
Jim Meyering |
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Subject: |
Changes to grep/manual/html_node/Other-Options.html,v |
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Date: |
Tue, 23 Mar 2010 12:04:31 +0000 |
CVSROOT: /webcvs/grep
Module name: grep
Changes by: Jim Meyering <meyering> 10/03/23 12:04:22
Index: html_node/Other-Options.html
===================================================================
RCS file: /webcvs/grep/grep/manual/html_node/Other-Options.html,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -b -r1.1 -r1.2
--- html_node/Other-Options.html 24 May 2009 18:42:59 -0000 1.1
+++ html_node/Other-Options.html 23 Mar 2010 12:04:20 -0000 1.2
@@ -1,8 +1,8 @@
<html lang="en">
<head>
-<title>Other Options - GNU Grep 2.5.4</title>
+<title>Other Options - GNU Grep 2.6</title>
<meta http-equiv="Content-Type" content="text/html">
-<meta name="description" content="GNU Grep 2.5.4">
+<meta name="description" content="GNU Grep 2.6">
<meta name="generator" content="makeinfo 4.13">
<link title="Top" rel="start" href="index.html#Top">
<link rel="up" href="Command_002dline-Options.html#Command_002dline-Options"
title="Command-line Options">
@@ -11,8 +11,8 @@
<!--
This manual is for `grep', a pattern matching engine.
-Copyright (C) 1999, 2000, 2001, 2002, 2005, 2008, 2009 Free
-Software Foundation, Inc.
+Copyright (C) 1999-2002, 2005, 2008-2010 Free Software Foundation,
+Inc.
Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License,
@@ -46,17 +46,15 @@
<h4 class="subsection">2.1.7 Other Options</h4>
<dl>
-<dt>‘<samp><span class="samp">--line-buffered</span></samp>’<dd><a
name="index-g_t_002d_002dline_002dbuffered-115"></a><a
name="index-line-buffering-116"></a>Use line buffering on output.
+<dt>‘<samp><span class="samp">--line-buffered</span></samp>’<dd><a
name="index-g_t_002d_002dline_002dbuffered-119"></a><a
name="index-line-buffering-120"></a>Use line buffering on output.
This can cause a performance penalty.
- <br><dt>‘<samp><span class="samp">--mmap</span></samp>’<dd><a
name="index-g_t_002d_002dmmap-117"></a><a
name="index-memory-mapped-input-118"></a>If possible, use the <code>mmap</code>
system call to read input,
-instead of the default <code>read</code> system call.
-In some situations, ‘<samp><span
class="samp">--mmap</span></samp>’ yields better performance.
-However, ‘<samp><span class="samp">--mmap</span></samp>’ can cause
undefined behavior (including core dumps)
-if an input file shrinks while <samp><span class="command">grep</span></samp>
is operating,
-or if an I/O error occurs.
+ <br><dt>‘<samp><span class="samp">--mmap</span></samp>’<dd><a
name="index-g_t_002d_002dmmap-121"></a><a
name="index-memory-mapped-input-122"></a>This option is ignored for backwards
compatibility. It used to read
+input with the <code>mmap</code> system call, instead of the default
<code>read</code>
+system call. On modern systems, ‘<samp><span
class="samp">--mmap</span></samp>’ rarely if ever yields
+better performance.
- <br><dt>‘<samp><span
class="samp">-U</span></samp>’<dt>‘<samp><span
class="samp">--binary</span></samp>’<dd><a
name="index-g_t_002dU-119"></a><a name="index-g_t_002d_002dbinary-120"></a><a
name="index-g_t_0040sc_007bms_002ddos_007d_002f_0040sc_007bms_007d_002dWindows-binary-files-121"></a><a
name="index-binary-files_002c-_0040sc_007bms_002ddos_007d_002f_0040sc_007bms_007d_002dWindows-122"></a>Treat
the file(s) as binary.
+ <br><dt>‘<samp><span
class="samp">-U</span></samp>’<dt>‘<samp><span
class="samp">--binary</span></samp>’<dd><a
name="index-g_t_002dU-123"></a><a name="index-g_t_002d_002dbinary-124"></a><a
name="index-g_t_0040sc_007bms_002ddos_007d_002f_0040sc_007bms_007d_002dWindows-binary-files-125"></a><a
name="index-binary-files_002c-_0040sc_007bms_002ddos_007d_002f_0040sc_007bms_007d_002dWindows-126"></a>Treat
the file(s) as binary.
By default, under <span class="sc">ms-dos</span> and <span
class="sc">ms</span>-Windows,
<samp><span class="command">grep</span></samp> guesses the file type
by looking at the contents of the first 32kB read from the file.
@@ -70,7 +68,7 @@
This option has no effect
on platforms other than <span class="sc">ms-dos</span> and <span
class="sc">ms</span>-Windows.
- <br><dt>‘<samp><span
class="samp">-z</span></samp>’<dt>‘<samp><span
class="samp">--null-data</span></samp>’<dd><a
name="index-g_t_002dz-123"></a><a
name="index-g_t_002d_002dnull_002ddata-124"></a><a
name="index-zero_002dterminated-lines-125"></a>Treat the input as a set of
lines, each terminated by a zero byte (the
+ <br><dt>‘<samp><span
class="samp">-z</span></samp>’<dt>‘<samp><span
class="samp">--null-data</span></samp>’<dd><a
name="index-g_t_002dz-127"></a><a
name="index-g_t_002d_002dnull_002ddata-128"></a><a
name="index-zero_002dterminated-lines-129"></a>Treat the input as a set of
lines, each terminated by a zero byte (the
<span class="sc">ascii</span> <code>NUL</code> character) instead of a
newline.
Like the ‘<samp><span class="samp">-Z</span></samp>’ or
‘<samp><span class="samp">--null</span></samp>’ option,
this option can be used with commands like
- Changes to grep/manual/html_node/Other-Options.html,v,
Jim Meyering <=