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<title>execline: the withstdinas command</title>
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<p>
<a href="index.html">execline</a><br />
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<h1> The <tt>withstdinas</tt> program </h1>
<p>
<tt>withstdinas</tt> reads the entirety of its standard input in an
environment variable, and runs another program with that additional
environment variable.
</p>
<h2> Interface </h2>
<p>
In an <a href="execlineb.html">execlineb</a> script:
</p>
<pre>
withstdinas [ -i | -D <em>default</em> ] [ -n ] <em>variable</em> <em>prog...</em>
</pre>
<ul>
<li> <tt>withstdinas</tt> reads its stdin until EOF. </li>
<li> It then execs into <em>prog...</em>, with
<em>variable</em> added to the environment; the value of
<em>variable</em> is what was read on stdin. </li>
</ul>
<h2> Options </h2>
<ul>
<li> <tt>-i</tt> : insist. If the data on stdin is invalid as
an environment variable, for instance if it contains a null
character, <tt>withstdinas</tt> exits 1. </li>
<li> <tt>-D <em>default</em></tt> : default value.
If the data on stdin is invalid, <em>default</em> is used as
<em>variable</em>'s value. If neither the <tt>-i</tt> nor the <tt>-D</tt>
option have been given, <tt>withstdinas</tt> execs into
<em>prog...</em> with <em>variable</em> containing whatever value could be read on stdin,
cut before the first null character. </li>
<li> <tt>-n</tt> : chomp an ending newline off stdin. </li>
</ul>
<h2> Notes </h2>
<ul>
<li> You can start <em>prog...</em> with "import -u <em>variable</em>"
to perform variable substitution. </li>
</ul>
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