96 lines
5.1 KiB
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96 lines
5.1 KiB
HTML
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<title>Screen Size - Debugging with GDB</title>
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<a name="Screen-Size"></a>
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Next: <a rel="next" accesskey="n" href="Output-Styling.html#Output-Styling">Output Styling</a>,
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Previous: <a rel="previous" accesskey="p" href="Command-History.html#Command-History">Command History</a>,
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Up: <a rel="up" accesskey="u" href="Controlling-GDB.html#Controlling-GDB">Controlling GDB</a>
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<h3 class="section">22.4 Screen Size</h3>
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<p><a name="index-size-of-screen-1679"></a><a name="index-screen-size-1680"></a><a name="index-pagination-1681"></a><a name="index-page-size-1682"></a><a name="index-pauses-in-output-1683"></a>
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Certain commands to <span class="sc">gdb</span> may produce large amounts of
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information output to the screen. To help you read all of it,
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<span class="sc">gdb</span> pauses and asks you for input at the end of each page of
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output. Type <RET> when you want to see one more page of output,
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<kbd>q</kbd> to discard the remaining output, or <kbd>c</kbd> to continue
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without paging for the rest of the current command. Also, the screen
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width setting determines when to wrap lines of output. Depending on
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what is being printed, <span class="sc">gdb</span> tries to break the line at a
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readable place, rather than simply letting it overflow onto the
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following line.
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<p>Normally <span class="sc">gdb</span> knows the size of the screen from the terminal
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driver software. For example, on Unix <span class="sc">gdb</span> uses the termcap data base
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together with the value of the <code>TERM</code> environment variable and the
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<code>stty rows</code> and <code>stty cols</code> settings. If this is not correct,
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you can override it with the <code>set height</code> and <code>set
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width</code> commands:
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<a name="index-set-height-1684"></a>
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<a name="index-set-width-1685"></a>
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<a name="index-show-width-1686"></a>
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<a name="index-show-height-1687"></a>
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<dl><dt><code>set height </code><var>lpp</var><dt><code>set height unlimited</code><dt><code>show height</code><dt><code>set width </code><var>cpl</var><dt><code>set width unlimited</code><dt><code>show width</code><dd>These <code>set</code> commands specify a screen height of <var>lpp</var> lines and
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a screen width of <var>cpl</var> characters. The associated <code>show</code>
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commands display the current settings.
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<p>If you specify a height of either <code>unlimited</code> or zero lines,
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<span class="sc">gdb</span> does not pause during output no matter how long the
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output is. This is useful if output is to a file or to an editor
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buffer.
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<p>Likewise, you can specify ‘<samp><span class="samp">set width unlimited</span></samp>’ or ‘<samp><span class="samp">set
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width 0</span></samp>’ to prevent <span class="sc">gdb</span> from wrapping its output.
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<br><dt><code>set pagination on</code><dt><code>set pagination off</code><dd><a name="index-set-pagination-1688"></a>Turn the output pagination on or off; the default is on. Turning
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pagination off is the alternative to <code>set height unlimited</code>. Note that
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running <span class="sc">gdb</span> with the <samp><span class="option">--batch</span></samp> option (see <a href="Mode-Options.html#Mode-Options">-batch</a>) also automatically disables pagination.
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<br><dt><code>show pagination</code><dd><a name="index-show-pagination-1689"></a>Show the current pagination mode.
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</dl>
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</body></html>
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