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POWhy is Perl complaining about an unterminated string here?
 

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  1. POWhy is Perl complaining about an unterminated string here?
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    <p>I have a Perl script which runs fine under Perl 5.005 on HPUX 11i v3 and that causes a small problem under Perl 5.10 on my Ubuntu 11.04 box.</p> <p>It boils down to a line like:</p> <pre><code>open (CMD, "do something | grep -E 'sometext$' |"); </code></pre> <p>(it's actually capturing <code>ps -ef</code> output to see if a process is running but I don't think that's important <sup>(a)</sup>).</p> <p>Now this runs fine on the HPUX environment but, when I try it out under Ubuntu, I get:</p> <pre><code>sh: Syntax error: Unterminated quoted string </code></pre> <p>By inserting copious debug statements, I tracked it down to that offending line then started removing characters one-by-one until it stopped complaining. Luckily, <code>$</code> was the first one I tried and it stopped giving me the error, so I then changed the line to:</p> <pre><code>open (CMD, "do something | grep -E 'sometext\$' |"); </code></pre> <p>and it worked fine (under Linux anyway - I haven't tested that on HPUX since I don't have access to that machine today - if it does work, I'll just use that approach but I'd still like to know why it's a problem).</p> <p>So it seems obvious that the <code>$</code> is "swallowing" the closing single quote under my Linux environment but not apparently on the HPUX one.</p> <p>My question is simply, why? Surely there weren't any massive changes between 5.005 and 5.10. Or is there some sort of configuration item I'm missing?</p> <hr> <p><sup>(a)</sup> But, if you know a better way to do this <em>without</em> external CPAN modules (ie, with just the baseline Perl 5.005 installation), I'd be happy to know about it.</p>
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    1. CO"Surely there weren't any massive changes between 5.005 and 5.10" That's eleven years of changes. There are a _lot_ of changes between those two versions. Take a look at the various perldelta manual pages.
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