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<title>s6-portable-utils: the s6-unquote-filter program</title>
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<p>
<a href="index.html">s6-portable-utils</a><br />
<a href="http://skarnet.org/software/">Software</a><br />
<a href="http://skarnet.org/">skarnet.org</a>
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<h1> The <tt>s6-unquote-filter</tt> program </h1>
<p>
s6-unquote acts as a filter, reading quoted strings on stdin,
unquoting them and writing the results to stdout.
</p>
<h2> Interface </h2>
<pre>
s6-unquote-filter [ -q | -Q | -v | -w ] [ -d <em>delim</em> ]
</pre>
<ul>
<li> s6-unquote-filter reads lines on stdin. It exits 0 on EOF. </li>
<li> It expects read lines to follow the
syntax of <a href="s6-quote.html">s6-quote</a>'s output strings </li>
<li> Depending on the strictness options, it prints various warning
or error messages to stderr if it cannot properly unquote lines. In
the very strict mode, it exits 100 on the first unquoting error. </li>
<li> If it is successful at unquoting, it prints�the resulting
lines to stdout. </li>
</ul>
<h2> Options </h2>
<ul>
<li> <tt>-d</tt> <em>delim</em> : a list of characters that
will be considered as delimitors (to start and end the quoted string).
By default, only the double quote is such a character. If <em>delim</em>
is the empty string, s6-unquote-filter interprets <em>string</em> as
non-delimited, only escaped (i.e. for instance the result of some
<tt>s6-quote-filter -u</tt> operation). </li>
<li> <tt>-q</tt> : loose/quiet mode. s6-unquote-filter will
silently accommodate errors. </li>
<li> <tt>-Q</tt> : normal mode. This is the default. s6-unquote-filter
will warn on errors. </li>
<li> <tt>-v</tt> : strict/verbose mode. s6-unquote-filter will
warn loudly on errors, with many details. </li>
<li> <tt>-w</tt> : very strict mode. s6-unquote-filter will complain
and die on the first unquoting error it encounters. </li>
</ul>
<h2> Notes </h2>
<ul>
<li> Quoted strings can be produced via the <a href="s6-quote.html">s6-quote</a> or
<a href="s6-quote-filter.html">s6-quote-filter</a> programs. </li>
</ul>
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