104 lines
4.4 KiB
HTML
104 lines
4.4 KiB
HTML
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<html lang="en">
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<head>
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<title>Edit - Debugging with GDB</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Debugging with GDB">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Source.html#Source" title="Source">
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<link rel="prev" href="Specify-Location.html#Specify-Location" title="Specify Location">
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<link rel="next" href="Search.html#Search" title="Search">
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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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</head>
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<body>
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<div class="node">
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<a name="Edit"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Search.html#Search">Search</a>,
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Previous: <a rel="previous" accesskey="p" href="Specify-Location.html#Specify-Location">Specify Location</a>,
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Up: <a rel="up" accesskey="u" href="Source.html#Source">Source</a>
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<hr>
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</div>
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<h3 class="section">9.3 Editing Source Files</h3>
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<p><a name="index-editing-source-files-567"></a>
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<a name="index-edit-568"></a><a name="index-e-_0040r_007b_0028_0040code_007bedit_007d_0029_007d-569"></a>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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<dl>
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<dt><code>edit </code><var>location</var><dd>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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<dl>
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<dt><code>edit </code><var>number</var><dd>Edit the current source file with <var>number</var> as the active line number.
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<br><dt><code>edit </code><var>function</var><dd>Edit the file containing <var>function</var> at the beginning of its definition.
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</dl>
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</dl>
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<h4 class="subsection">9.3.1 Choosing your Editor</h4>
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<p>You can customize <span class="sc">gdb</span> to use any editor you want
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<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>.
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By default, it is <samp><span class="file">/bin/ex</span></samp>, but you can change this
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by setting the environment variable <code>EDITOR</code> before using
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<span class="sc">gdb</span>. For example, to configure <span class="sc">gdb</span> 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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<pre class="smallexample"> EDITOR=/usr/bin/vi
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export EDITOR
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gdb ...
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</pre>
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<p>or in the <code>csh</code> shell,
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<pre class="smallexample"> setenv EDITOR /usr/bin/vi
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gdb ...
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</pre>
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<div class="footnote">
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<hr>
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<h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small>
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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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<pre class="smallexample"> ex +<var>number</var> file
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</pre>
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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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<hr></div>
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</body></html>
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