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140 lines
5.5 KiB
HTML
140 lines
5.5 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Edit (Debugging with GDB)</title>
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<meta name="description" content="Edit (Debugging with GDB)">
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<meta name="keywords" content="Edit (Debugging with GDB)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Source.html#Source" rel="up" title="Source">
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<link href="Search.html#Search" rel="next" title="Search">
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<link href="Address-Locations.html#Address-Locations" rel="prev" title="Address Locations">
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<style type="text/css">
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<!--
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a.summary-letter {text-decoration: none}
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blockquote.indentedblock {margin-right: 0em}
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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blockquote.smallquotation {font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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div.lisp {margin-left: 3.2em}
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div.smalldisplay {margin-left: 3.2em}
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div.smallexample {margin-left: 3.2em}
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div.smalllisp {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.format {font-family: inherit}
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pre.menu-comment {font-family: serif}
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pre.menu-preformatted {font-family: serif}
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pre.smalldisplay {font-family: inherit; font-size: smaller}
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pre.smallexample {font-size: smaller}
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pre.smallformat {font-family: inherit; font-size: smaller}
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pre.smalllisp {font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Edit"></a>
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<div class="header">
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<p>
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Next: <a href="Search.html#Search" accesskey="n" rel="next">Search</a>, Previous: <a href="Specify-Location.html#Specify-Location" accesskey="p" rel="prev">Specify Location</a>, Up: <a href="Source.html#Source" accesskey="u" rel="up">Source</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Editing-Source-Files"></a>
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<h3 class="section">9.3 Editing Source Files</h3>
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<a name="index-editing-source-files"></a>
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<a name="index-edit"></a>
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<a name="index-e-_0028edit_0029"></a>
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<p>To edit the lines in a source file, use the <code>edit</code> command.
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The editing program of your choice
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is invoked with the current line set to
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the active line in the program.
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Alternatively, there are several ways to specify what part of the file you
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want to print if you want to see other parts of the program:
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</p>
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<dl compact="compact">
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<dt><code>edit <var>location</var></code></dt>
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<dd><p>Edit the source file specified by <code>location</code>. Editing starts at
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that <var>location</var>, e.g., at the specified source line of the
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specified file. See <a href="Specify-Location.html#Specify-Location">Specify Location</a>, for all the possible forms
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of the <var>location</var> argument; here are the forms of the <code>edit</code>
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command most commonly used:
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</p>
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<dl compact="compact">
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<dt><code>edit <var>number</var></code></dt>
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<dd><p>Edit the current source file with <var>number</var> as the active line number.
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</p>
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</dd>
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<dt><code>edit <var>function</var></code></dt>
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<dd><p>Edit the file containing <var>function</var> at the beginning of its definition.
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</p></dd>
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</dl>
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</dd>
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</dl>
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<a name="Choosing-your-Editor"></a>
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<h4 class="subsection">9.3.1 Choosing your Editor</h4>
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<p>You can customize <small>GDB</small> to use any editor you want
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<a name="DOCF9" href="#FOOT9"><sup>9</sup></a>.
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By default, it is <samp>/bin/ex</samp>, but you can change this
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by setting the environment variable <code>EDITOR</code> before using
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<small>GDB</small>. For example, to configure <small>GDB</small> to use the
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<code>vi</code> editor, you could use these commands with the <code>sh</code> shell:
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</p><div class="smallexample">
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<pre class="smallexample">EDITOR=/usr/bin/vi
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export EDITOR
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gdb …
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</pre></div>
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<p>or in the <code>csh</code> shell,
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</p><div class="smallexample">
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<pre class="smallexample">setenv EDITOR /usr/bin/vi
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gdb …
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</pre></div>
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<div class="footnote">
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<hr>
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<h4 class="footnotes-heading">Footnotes</h4>
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<h3><a name="FOOT9" href="#DOCF9">(9)</a></h3>
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<p>The only restriction is that your editor (say <code>ex</code>), recognizes the
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following command-line syntax:
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</p><div class="smallexample">
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<pre class="smallexample">ex +<var>number</var> file
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</pre></div>
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<p>The optional numeric value +<var>number</var> specifies the number of the line in
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the file where to start editing.</p>
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</div>
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</body>
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</html>
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