master

分支 (1)

管理

管理

master

kaelindaTop
/
15223750607281.html

<!doctype html>
<html class="no-js" lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>

  每天学习一个shell技能  (3) - kaelinda

  </title>


  <link href="atom.xml" rel="alternate" title="kaelinda" type="application/atom+xml">
    <link rel="stylesheet" href="asset/css/foundation.min.css" />
    <link rel="stylesheet" href="asset/css/docs.css" />
    <script src="asset/js/vendor/modernizr.js"></script>
    <script src="asset/js/vendor/jquery.js"></script>
  <script src="asset/highlightjs/highlight.pack.js"></script>
  <link href="asset/highlightjs/styles/github.css" media="screen, projection" rel="stylesheet" type="text/css">
  <script>hljs.initHighlightingOnLoad();</script>
<script type="text/javascript">
  function before_search(){
    var searchVal = 'site:kaelinda.top ' + document.getElementById('search_input').value;
    document.getElementById('search_q').value = searchVal;
    return true;
  }
</script>
  </head>
  <body class="antialiased hide-extras">

    <div class="marketing off-canvas-wrap" data-offcanvas>
      <div class="inner-wrap">


<nav class="top-bar docs-bar hide-for-small" data-topbar>


  <section class="top-bar-section">
  <div class="row">
      <div style="position: relative;width:100%;"><div style="position: absolute; width:100%;">
        <ul id="main-menu" class="left">

        <li id=""><a target="_self" href="index.html">最近更新</a></li>

        <li id=""><a target="_self" href="archives.html">归档目录</a></li>

        <li id="ios.css"><a target="_self" href="ios.html">iOS</a></li>

        <li id="swift.css"><a target="_self" href="swift.html">Swift</a></li>

        <li id="reactnative.css"><a target="_self" href="reactnative.html">RN</a></li>

        <li id="js.css"><a target="_self" href="js.html">JS</a></li>

        <li id="shell.css"><a target="_self" href="shell.html">shell</a></li>

        <li id="coding.css"><a target="_self" href="coding.html">编程</a></li>

        <li id="live.css"><a target="_self" href="live.html">随笔</a></li>

        <li id="app.css"><a target="_blank" href="app.html">APP推荐</a></li>

        </ul>

        <ul class="right" id="search-wrap">
          <li>
<form target="_blank" onsubmit="return before_search();" action="http://google.com/search" method="get">
    <input type="hidden" id="search_q" name="q" value="" />
    <input tabindex="1" type="search" id="search_input"  placeholder="Search"/>
</form>
</li>
          </ul>
      </div></div>
  </div>
  </section>

</nav>

        <nav class="tab-bar show-for-small">
  <a href="javascript:void(0)" class="left-off-canvas-toggle menu-icon">
    <span> &nbsp; kaelinda</span>
  </a>
</nav>

<aside class="left-off-canvas-menu">
      <ul class="off-canvas-list">

        <li><a target="_self" href="index.html">最近更新</a></li>

        <li><a target="_self" href="archives.html">归档目录</a></li>

        <li><a target="_self" href="ios.html">iOS</a></li>

        <li><a target="_self" href="swift.html">Swift</a></li>

        <li><a target="_self" href="reactnative.html">RN</a></li>

        <li><a target="_self" href="js.html">JS</a></li>

        <li><a target="_self" href="shell.html">shell</a></li>

        <li><a target="_self" href="coding.html">编程</a></li>

        <li><a target="_self" href="live.html">随笔</a></li>

        <li><a target="_blank" href="app.html">APP推荐</a></li>


    <li><label>Categories</label></li>


            <li><a href="reactnative.html">React-Native</a></li>

            <li><a href="ios.html">iOS</a></li>

            <li><a href="app.html">MacAPP</a></li>

            <li><a href="swift.html">Swift</a></li>

            <li><a href="js.html">JavaScript</a></li>

            <li><a href="vue.html">Vue</a></li>

            <li><a href="shell.html">shell</a></li>

            <li><a href="%E7%BD%91%E7%BB%9C.html">网络</a></li>


      </ul>
    </aside>

<a class="exit-off-canvas" href="#"></a>


        <section id="main-content" role="main" class="scroll-container">


 <script type="text/javascript">
  $(function(){
    $('#menu_item_index').addClass('is_active');
  });
</script>
<div class="row">
  <div class="large-8 medium-8 columns">
      <div class="markdown-body article-wrap">
       <div class="article">

          <h1>每天学习一个shell技能  (3)</h1>

        <div class="read-more clearfix">
          <span class="date">2018/3/30</span>

          <span>posted in&nbsp;</span>

              <span class="posted-in"><a href='shell.html'>shell</a></span>


          <span class="comments">


          </span>

        </div>
      </div><!-- article -->

      <div class="article-content">
      <h2 id="toc_0">shell参数传递</h2>

<p>我们可以在脚本执行时，向脚本传递参数</p>

<pre><code class="language-text">// 终端运行 脚本，并传入参数
sh testBash.sh 0 1 2

echo &quot;Shell 传递参数实例！&quot;

echo &quot;\$0 =&gt; $0&quot;

echo &quot;\$1 =&gt; $1&quot;
</code></pre>

<p>打印结果：</p>

<pre><code class="language-text">Shell 传递参数实例！
$0 =&gt; testBash.sh
$1 =&gt; 0
</code></pre>

<span id="more"></span><!-- more -->

<table>
<thead>
<tr>
<th style="text-align: center">参数处理</th>
<th style="text-align: center">参数说明</th>
</tr>
</thead>

<tbody>
<tr>
<td style="text-align: center">$#</td>
<td style="text-align: center">传递到脚本的参数个数</td>
</tr>
<tr>
<td style="text-align: center">$*</td>
<td style="text-align: center">以一个单字符串显示所有向脚本传递的参数</td>
</tr>
<tr>
<td style="text-align: center">$$</td>
<td style="text-align: center">脚本运行的当前进程ID号</td>
</tr>
<tr>
<td style="text-align: center">$!</td>
<td style="text-align: center">后台运行的最后一个进程的ID号</td>
</tr>
<tr>
<td style="text-align: center">$@</td>
<td style="text-align: center">与$*相同，但是使用时加引号，并在引号中返回每个参数</td>
</tr>
<tr>
<td style="text-align: center">$-</td>
<td style="text-align: center">显示Shell使用的当前选项</td>
</tr>
<tr>
<td style="text-align: center">$?</td>
<td style="text-align: center">显示最后命令的退出状态。0表示没有错误，其他任何值表明有错误</td>
</tr>
</tbody>
</table>

<pre><code class="language-text">// 运行脚本
sh testBash.sh 0 1 2
</code></pre>

<pre><code class="language-text">echo &quot;\$0 =&gt; $0&quot;

echo &quot;\$1 =&gt; $1&quot;

echo &quot;\$@ =&gt; $@&quot;

echo &quot;\$* =&gt; $*&quot;

echo &quot;\$\$ =&gt; $$&quot;

echo &quot;\$! =&gt; $!&quot;

echo &quot;\$- =&gt; $-&quot;

echo &quot;\$? =&gt; $?&quot;

echo &quot;\$*传递的参数作为一个字符串显示：$*&quot;

echo &quot;\$@是作为一个数组返回 =&gt; $@&quot;
</code></pre>

<p>打印结果：</p>

<pre><code class="language-text">$0 =&gt; testBash.sh
$1 =&gt; 0
$@ =&gt; 0 1 2
$* =&gt; 0 1 2
$$ =&gt; 18859
$! =&gt;
$- =&gt; hB
$? =&gt; 0
$*传递的参数作为一个字符串显示：0 1 2
$@是作为一个数组返回 =&gt; 0 1 2
</code></pre>


      </div>

      <div class="row">
        <div class="large-6 columns">
        <p class="text-left" style="padding:15px 0px;">

          <a href="15224613481161.html"
          title="Previous Post: 每天学习一个shell技能（4）">&laquo; 每天学习一个shell技能（4）</a>

        </p>
        </div>
        <div class="large-6 columns">
      <p class="text-right" style="padding:15px 0px;">

          <a  href="15223028228569.html"
          title="Next Post: 每天学习一个shell技能 （1）">每天学习一个shell技能 （1） &raquo;</a>

      </p>
        </div>
      </div>
      <div class="comments-wrap">
        <div class="share-comments">


        </div>
      </div>
    </div><!-- article-wrap -->
  </div><!-- large 8 -->


 <div class="large-4 medium-4 columns">
  <div class="hide-for-small">
    <div id="sidebar" class="sidebar">
          <div id="site-info" class="site-info">

                <div class="site-a-logo"><img src="https://ws1.sinaimg.cn/large/006tNc79ly1fmpk9088gsj30sg0sgn33.jpg" /></div>

                <h1>kaelinda</h1>
                <div class="site-des">倘若我心中的山水，你眼中能看到，我便一步一莲花祈祷</div>
                <div class="social">


<a target="_blank" class="twitter" target="_blank" href="https://twitter.com/KaelLVLinda" title="Twitter">Twitter</a>
<a target="_blank" class="github" target="_blank" href="https://github.com/Kaelzzs" title="GitHub">GitHub</a>
<a target="_blank" class="email" href="mailto:zhouzuosong_kael@163.com" title="Email">Email</a>
  <a target="_blank" class="rss" href="atom.xml" title="RSS">RSS</a>

              	 </div>
          	</div>


              <div id="site-categories" class="side-item ">
                <div class="side-header">
                  <h2>Categories</h2>
                </div>
                <div class="side-content">

      	<p class="cat-list">

            <a href="reactnative.html"><strong>React-Native</strong></a>

            <a href="ios.html"><strong>iOS</strong></a>

            <a href="app.html"><strong>MacAPP</strong></a>

            <a href="swift.html"><strong>Swift</strong></a>

            <a href="js.html"><strong>JavaScript</strong></a>

            <a href="vue.html"><strong>Vue</strong></a>

            <a href="shell.html"><strong>shell</strong></a>

            <a href="%E7%BD%91%E7%BB%9C.html"><strong>网络</strong></a>

        </p>


                </div>
              </div>

              <div id="site-categories" class="side-item">
                <div class="side-header">
                  <h2>Recent Posts</h2>
                </div>
                <div class="side-content">
                <ul class="posts-list">


			      <li class="post">
			        <a href="15523077857608.html">OC中枚举写法  以及 字符串枚举探索</a>
			      </li>


			      <li class="post">
			        <a href="15522686353535.html">iOS 动画全解 (1)</a>
			      </li>


			      <li class="post">
			        <a href="15501356584731.html">UITableView顶部空白的几种解决办法</a>
			      </li>


			      <li class="post">
			        <a href="15488351784332.html">Objective-C中的字符串类型枚举 探索</a>
			      </li>


			      <li class="post">
			        <a href="15409691048860.html">【Swift笔记】引用计数</a>
			      </li>


		  		</ul>
                </div>
              </div>
        </div><!-- sidebar -->
      </div><!-- hide for small -->
</div><!-- large 4 -->

</div><!-- row -->

 <div class="page-bottom clearfix">
  <div class="row">
   <p class="copyright">Copyright &copy; 2015
Powered by <a target="_blank" href="http://www.mweb.im">MWeb</a>,&nbsp;
Theme used <a target="_blank" href="http://github.com">GitHub CSS</a>.</p>
  </div>
</div>

        </section>
      </div>
    </div>


    <script src="asset/js/foundation.min.js"></script>
    <script>
      $(document).foundation();
      function fixSidebarHeight(){
        var w1 = $('.markdown-body').height();
          var w2 = $('#sidebar').height();
          if (w1 > w2) { $('#sidebar').height(w1); };
      }
      $(function(){
        fixSidebarHeight();
      })
      $(window).load(function(){
          fixSidebarHeight();
      });

    </script>


<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script><script type="text/x-mathjax-config">MathJax.Hub.Config({TeX: { equationNumbers: { autoNumber: "AMS" } }});</script>


  </body>
</html>