update

exp_and_sub/parameter_expansion.html

@@ -2009,6 +2009,52 @@ <h1 id="quiz">Quiz</h1>
 <span class="hljs-number">121</span>
 $ hex2int <span class="hljs-number">0</span>x78
 <span class="hljs-number">120</span>
+</code></pre>
+<h1 id="2-">2 .</h1>
+<p>&#xBA85;&#xB839;&#xC758; &#xC778;&#xC218;&#xB85C; &#xD30C;&#xC77C;&#xC774; &#xC8FC;&#xC5B4;&#xC9C0;&#xBA74; &#xD30C;&#xC77C;&#xC5D0;&#xC11C; &#xB77C;&#xC778;&#xC744; &#xC77D;&#xC5B4;&#xB4E4;&#xC5EC; &#xCC98;&#xB9AC;&#xD558;&#xACE0;,
+&#xADF8;&#xB807;&#xC9C0; &#xC54A;&#xC73C;&#xBA74; stdin ( &#xD130;&#xBBF8;&#xB110;, &#xD30C;&#xC774;&#xD504;, redirection ) &#xC5D0;&#xC11C; &#xB77C;&#xC778;&#xC744; &#xC77D;&#xC5B4;&#xC11C; &#xCC98;&#xB9AC;&#xD558;&#xB294; &#xBA85;&#xB839;&#xC744; &#xB9CC;&#xB4DC;&#xB294; &#xAC83;&#xC785;&#xB2C8;&#xB2E4;.</p>
+<pre><code class="lang-bash">$ <span class="hljs-function"><span class="hljs-title">fun</span></span> () {                                      $ cat tmp.txt
+    <span class="hljs-built_in">local</span> sum                                   <span class="hljs-number">111</span>
+    <span class="hljs-keyword">while</span> <span class="hljs-built_in">read</span> -r line                          <span class="hljs-number">222</span>
+    <span class="hljs-keyword">do</span>                                          <span class="hljs-number">333</span>
+        sum+=<span class="hljs-string">&quot;<span class="hljs-variable">$line</span>&quot;</span>$<span class="hljs-string">&apos;\n&apos;</span>
+    <span class="hljs-keyword">done</span> &lt; <span class="hljs-string">&quot;<span class="hljs-variable">${1:-/dev/stdin}</span>&quot;</span>
+
+    <span class="hljs-built_in">echo</span> ----------------------
+    <span class="hljs-built_in">echo</span> -n <span class="hljs-string">&quot;<span class="hljs-variable">$sum</span>&quot;</span>
+    <span class="hljs-built_in">echo</span> ----------------------
+}
+
+<span class="hljs-comment">##################################################################</span>
+
+$ fun tmp.txt    <span class="hljs-comment"># &#xC778;&#xC218;&#xB85C; &#xD30C;&#xC77C;&#xC774; &#xC8FC;&#xC5B4;&#xC9C0;&#xBA74; &#xD30C;&#xC77C;&#xC5D0;&#xC11C; &#xB77C;&#xC778;&#xC744; &#xC77D;&#xC5B4; &#xB4E4;&#xC784;</span>
+----------------------
+<span class="hljs-number">111</span>
+<span class="hljs-number">222</span>
+<span class="hljs-number">333</span>
+----------------------
+
+$ fun      <span class="hljs-comment"># enter &#xD6C4; &#xB77C;&#xC778; &#xC785;&#xB825;</span>
+<span class="hljs-number">111</span>
+<span class="hljs-number">222</span>
+<span class="hljs-number">333</span>
+           <span class="hljs-comment"># ctrl-d &#xB85C; &#xC785;&#xB825; &#xC885;&#xB8CC;</span>
+----------------------
+<span class="hljs-number">111</span>
+<span class="hljs-number">222</span>
+<span class="hljs-number">333</span>
+----------------------
+
+$ fun &lt;&lt;\@                                $ <span class="hljs-built_in">echo</span> <span class="hljs-operator">-e</span> <span class="hljs-string">&quot;foo\nbar&quot;</span> | fun
+&gt; <span class="hljs-number">111</span>                                     ----------------------
+&gt; <span class="hljs-number">222</span>                                     foo
+&gt; <span class="hljs-number">333</span>                                     bar
+&gt; @                                       ----------------------
+----------------------                    
+<span class="hljs-number">111</span>                                       $ fun &lt;&lt;&lt; hello
+<span class="hljs-number">222</span>                                       ----------------------
+<span class="hljs-number">333</span>                                       hello
+----------------------                    ----------------------
 </code></pre>