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<title>execline: the piperw command</title>
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<p>
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<h1> The <tt>piperw</tt> program </h1>
<p>
<tt>piperw</tt> creates a pipe (an anonymous one), then
executes a program.
</p>
<h2> Interface </h2>
<pre>
piperw <em>fdr</em> <em>fdw</em> <em>prog...</em>
</pre>
<p>
<tt>piperw</tt> creates a pipe with descriptor <em>fdw</em> as the
writing end and descriptor <em>fdr</em> as the reading end.
It then execs into <em>prog</em> with its arguments.
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