ch08_10.htm

unix基础教程

command is given.</p>
</td></tr>
<tr><td><tt class="literal">readonly (ro)</tt></td><td><tt class="literal">noro</tt></td><td><p>Any writes (saves) of a file fail unless you
use <tt class="literal">!</tt> after the write (works with <tt class="literal">w</tt>, <tt class="literal">ZZ</tt>,
or <tt class="literal">autowrite</tt>).</p>
</td></tr>



<tr><td><tt class="literal">redraw (re)</tt></td><td>&nbsp;</td><td><p><tt class="literal">vi</tt> redraws the screen whenever edits are made
(in other words, insert mode
pushes over existing characters, and deleted lines immediately close up).
Default depends on line speed and terminal type.  <tt class="literal">noredraw</tt> is
useful at slow speeds on a dumb terminal: deleted lines show up as @,
and
inserted text appears to overwrite existing text until you
press Escape.</p>
</td></tr>
<tr><td><tt class="literal">remap</tt></td><td><tt class="literal">remap</tt></td><td><p>Allow nested map sequences.</p>
</td></tr>
<tr><td><tt class="literal">report</tt></td><td><tt class="literal">5</tt></td><td><p>Display a message on the status line whenever you make an edit that
affects at least a certain number of lines. For example,
<tt class="literal">6dd</tt> reports the message &#8220;6 lines deleted.&#8221;</p>
</td></tr>
<tr><td><tt class="literal">scroll</tt></td><td><tt class="literal">[</tt><em class="emphasis">&#189; window</em>]</td><td><p>Number of lines to scroll with <tt class="literal">^D</tt>
and <tt class="literal">^U</tt> commands.</p>
</td></tr>
<tr><td><tt class="literal">sections (sect)</tt></td><td><tt class="literal">SHNHH HU</tt></td><td><p>Define section delimiters for <tt class="literal">[[</tt>  and <tt class="literal">]]</tt>
movement.
The pairs of characters in the value are the names of
<tt class="literal">troff</tt> macros that begin sections.</p>
</td></tr>
<tr><td><tt class="literal">shell (sh)</tt></td><td><tt class="literal">/bin/sh</tt></td><td><p>Pathname of shell used for shell escape (<tt class="literal">:!</tt>) and shell
command (<tt class="literal">:sh</tt>). Default value is derived from shell
environment, which varies on different systems.</p>
</td></tr>
<tr><td><tt class="literal">shiftwidth (sw)</tt></td><td><tt class="literal">8</tt></td><td><p>Define number of spaces in
backward (<tt class="literal">^D</tt>) tabs when using the
<tt class="literal">autoindent</tt> option, and for the
<tt class="literal">&lt;&lt;</tt> and <tt class="literal">&gt;&gt;</tt>
commands.</p>
</td></tr>
<tr><td><tt class="literal">showmatch (sm)</tt></td><td><tt class="literal">nosm</tt></td><td><p>In <tt class="literal">vi</tt>, when
<tt class="literal">)</tt> or <tt class="literal">}</tt>
is entered, cursor moves
briefly to matching <tt class="literal">(</tt> or <tt class="literal">{</tt>.
(If no match, rings the error message bell.)
Very useful for programming.</p>
</td></tr>
<tr><td><tt class="literal">showmode</tt></td><td><tt class="literal">noshowmode</tt></td><td><p>In insert mode, display a message on the prompt line indicating the
type of insert you are making. For example, &#8220;OPEN MODE&#8221;
or &#8220;APPEND MODE.&#8221;</p>
</td></tr>
<tr><td><tt class="literal">slowopen (slow)</tt></td><td>&nbsp;</td><td><p>Hold off display during insert.
Default depends on line speed and terminal type.</p>
</td></tr>
<tr><td><tt class="literal">tabstop (ts)</tt></td><td><tt class="literal">8</tt></td><td><p>Define number of spaces a
tab indents during editing session.
(Printer still uses system tab of 8.)</p>
</td></tr>
<tr><td><tt class="literal">taglength (tl)</tt></td><td><tt class="literal">0</tt></td><td><p>Define number of characters that are significant for tags.
Default (zero) means that all characters are significant.</p>
</td></tr>
<tr><td><tt class="literal">tags</tt></td><td><p><em class="emphasis">tags</em> <em class="emphasis">/usr/lib/tags</em></p>
</td><td><p>Define pathname of files containing tags. (See the Unix
<tt class="literal">ctags</tt> command.)
(By default, <tt class="literal">vi</tt> searches
the file <tt class="literal">tags</tt> in the current directory
and <tt class="literal">/usr/lib/tags</tt>.)</p>
</td></tr>
<tr><td><tt class="literal">tagstack</tt></td><td><tt class="literal">tagstack</tt></td><td><p>Enable stacking of tag locations on a stack.</p>
</td></tr>
<tr><td><tt class="literal">term</tt></td><td>&nbsp;</td><td>Set terminal type.</td></tr>
<tr><td><tt class="literal">terse</tt></td><td><tt class="literal">noterse</tt></td><td><p>Display shorter error messages.</p>
</td></tr>
<tr><td><tt class="literal">timeout (to)</tt></td><td><tt class="literal">timeout</tt></td><td><p>Keyboard maps time out after 1&#160;second.<a href="#FOOTNOTE-9">[9]</a></p>
</td></tr>
<tr><td><tt class="literal">ttytype</tt></td><td>&nbsp;</td><td><p>Set terminal type.
This is just another name for <tt class="literal">term</tt>.</p>
</td></tr>
<tr><td><tt class="literal">warn</tt></td><td><tt class="literal">warn</tt></td><td><p>Display the warning message, &#8220;No write since last change.&#8221;</p>
</td></tr>
<tr><td><tt class="literal">window (w)</tt></td><td>&nbsp;</td><td><p>Show a certain number of lines of the file on the screen.
Default depends on line speed and terminal type.</p>
</td></tr>
<tr><td><tt class="literal">wrapscan (ws)</tt></td><td><tt class="literal">ws</tt></td><td><p>Searches wrap around either end of file.</p>
</td></tr>
<tr><td><tt class="literal">wrapmargin (wm)</tt></td><td><tt class="literal">0</tt></td><td><p>Define right margin.
If greater than zero, automatically insert carriage returns to break
lines.</p>
</td></tr>
<tr><td><tt class="literal">writeany (wa)</tt></td><td><tt class="literal">nowa</tt></td><td>Allow saving to any file.</td></tr>
</table><p>
<a name="FOOTNOTE-9">[9]</a> When you have mappings of several keys (for example,
<tt class="literal">:map zzz 3dw</tt>), you probably want to use
<tt class="literal">notimeout</tt>. Otherwise you need to type <tt class="literal">zzz</tt>
within 1 second.
When you have an insert mode mapping for a cursor key (for example,
<tt class="literal">:map! ^[OB ^[ja</tt>), you should use <tt class="literal">timeout</tt>.
Otherwise, <tt class="literal">vi</tt> won't react to Escape
until you type another key.</p>
</blockquote>
</div>

<a name="unut-ch-8-sect-10.3" /><div class="sect2"><h3 class="sect2">8.10.3. Example .exrc File</h3><blockquote><pre class="code">set nowrapscan wrapmargin=7
set sections=SeAhBhChDh nomesg
map q :w^M:n^M
map v dwElp
ab ORA O'Reilly &amp; Associates, Inc.</pre></blockquote>
<p>
<a name="IXT-8-123164" />
<a name="IXT-8-123165" />
<a name="IXT-8-123166" /></p>
</div>


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