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<p dir="auto">On 17 Jul 2019, at 13:07, Jason A. Donenfeld wrote:</p>
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<div style="white-space:normal"><blockquote style="border-left:2px solid #777; color:#777; margin:0 0 5px; padding-left:5px"><p dir="auto">- graph == punct|alnum ? or is it missing things?</p>
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<p dir="auto">Having a hard time finding the POSIX definition, but GNU grep explicitly says that <code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0 0.4em" bgcolor="#F7F7F7">[:graph:]</code> is equivalent to <code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0 0.4em" bgcolor="#F7F7F7">[:alnum:]</code> plus <code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0 0.4em" bgcolor="#F7F7F7">[:punct:]</code>: <a href="https://www.gnu.org/software/grep/manual/html_node/Character-Classes-and-Bracket-Expressions.html" style="color:#3983C4">https://www.gnu.org/software/grep/manual/html_node/Character-Classes-and-Bracket-Expressions.html</a></p>
<p dir="auto">Using <code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0 0.4em" bgcolor="#F7F7F7">man ispunct</code> and <code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0 0.4em" bgcolor="#F7F7F7">man isgraph</code> on macOS indicates that <code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0 0.4em" bgcolor="#F7F7F7">[:print:]</code> is <code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0 0.4em" bgcolor="#F7F7F7">[:graph:]</code> minus <code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0 0.4em" bgcolor="#F7F7F7">[:alnum:]</code>.</p>
<p dir="auto">A quick test confirms this:</p>
<pre style="background-color:#F7F7F7; border-radius:5px 5px 5px 5px; margin-left:15px; margin-right:15px; max-width:90vw; overflow-x:auto; padding:5px" bgcolor="#F7F7F7"><code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0" bgcolor="#F7F7F7">% for ch in {0..127}; do printf "\\x$(printf '%02x' $ch)"; done|tr -cd '[:alnum:][:punct:]'; echo
!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
% for ch in {0..127}; do printf "\\x$(printf '%02x' $ch)"; done|tr -cd '[:graph:]'; echo
!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
</code></pre>
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<div style="white-space:normal"><blockquote style="border-left:2px solid #777; color:#777; margin:0 0 5px; padding-left:5px"><p dir="auto">- There was some mention in the thread about toybox having issues with those?</p>
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<p dir="auto">The <code style="background-color:#F7F7F7; border-radius:3px; margin:0; padding:0 0.4em" bgcolor="#F7F7F7">tr.c</code> included with BusyBox says it comes from Minix, so presumably everything borrowing from Minix would have the same issue.</p>
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