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autodoc.git/modref/ex/predef_3A_3A/Process/popen.html:78:   <dt class='head--doc'>See also</dt>   <dd class='body--doc'><p><a class='ms reference' href='../../predef_3A_3A/Process/system.html'>system</a>, <a class='ms reference' href='../../predef_3A_3A/Process/spawn.html'>spawn</a></p>   </dd></dl>         <hr />   <dl class='group--doc'>   <dt class='head--type'><span class='homogen--type'>Method</span>   <span class='homogen--name'><b>popen</b></span>   </dt> - <dd><p><code><code class='object resolved'><code class='reference unresolved'>Stdio.FILE</code></code> <b><span class='method'>popen</span>(</b><code class='datatype'>string</code> <code class='argument'>command</code>, <code class='datatype'>string</code> <code class='argument'>mode</code><b>)</b></code></p></dd> + <dd><p><code><code class='object resolved'><a class='ms reference' href='../../predef_3A_3A/Stdio/FILE.html'>Stdio.FILE</a></code> <b><span class='method'>popen</span>(</b><code class='datatype'>string</code> <code class='argument'>command</code>, <code class='datatype'>string</code> <code class='argument'>mode</code><b>)</b></code></p></dd>      <dt class='head--doc'>Description</dt>   <dd class='body--doc'><p>Open a "process" for reading or writing. The <a class='ms reference' href='../../predef_3A_3A/Process/popen.html'>command</a> is executed    as a shell statement ("<code class='expr'>/bin/sh&nbsp;-c&nbsp;<a&nbsp;class='ms&nbsp;reference'&nbsp;href='../../predef_3A_3A/Process/popen.html'>command</a></code>" for Unix,    "<code class='expr'>cmd&nbsp;/c&nbsp;<a&nbsp;class='ms&nbsp;reference'&nbsp;href='../../predef_3A_3A/Process/popen.html'>command</a></code>" for Windows). The parameter <a class='ms reference' href='../../predef_3A_3A/Process/popen.html'>mode</a>    should be one of the following letters:</p>   <table class='box'><tr><td><code><code class='key'>"r"</code></code></td><td><p>Open for reading. Data written by the process to stdout    is available for read.</p>   </td></tr>   <tr><td><code><code class='key'>"w"</code></code></td><td><p>Open for writing. Data written to the file is available