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NSH: Loosen up if-then-else-fi syntx so that a command can be on the same line as the 'then' and 'else' tokens. This allows, as an example, 'if true; then echo true; else echo false; fi' which is much more bash-like

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Gregory Nutt 2014-01-17 18:03:23 -06:00
parent 57ad71d6c3
commit b5c68e1d15
1 changed files with 26 additions and 7 deletions
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Documentation/NuttShell.html
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@ -618,15 +618,34 @@ fi
<p>
<code>while-do-done</code> and <code>until-do-done</code> looping constructs are also supported.
These works from the command line but are primarily intended for use within NSH scripts
These work from the command line but are primarily intended for use within NSH scripts
(see the <a href="#cmdsh"><code>sh</code></a> command).
The syntax is as follows:
</p>
<ul><dl>
<dt><code>while &lt;test-cmd&gt;; do &lt;cmd-sequence&gt;; done</code></dt>
<dd>Execute <code>&lt;cmd-sequence&gt;</code> as long as <code>&lt;test-cmd&gt;</code> has an exit status of zero.</dd>
<dt><code>until &lt;test-cmd&gt;; do &lt;cmd-sequence&gt;; done</code></dt>
<dd>Execute <code>&lt;cmd-sequence&gt;</code> as long as <code>&lt;test-cmd&gt;</code> has a non-zero exit status.</dd>
<ul>
<li>
<p><b><code>while-do-done</code></b>.
Execute <code>[sequence of &lt;cmd&gt;]</code> as long as <code>&lt;cmd&gt;</code> has an exit status of zero.
The syntax is as follows:
<ul><pre>
while &lt;cmd&gt;
do
[sequence of &lt;cmd&gt;]
done
</pre></ul>
</p>
</li>
<li>
<p><b><code>until-do-done</code></b>
Execute <code>[sequence of &lt;cmd&gt;]</code> as long as <code>&lt;cmd&gt;</code> has a non-zero exit status.
The syntax is as follows:
<ul><pre>
while &lt;cmd&gt;
do
[sequence of &lt;cmd&gt;]
done
</pre></ul>
</p>
</li>
</dl></ul>
<table width ="100%">