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Question on qx

by narashima (Beadle)
on Nov 03, 2006 at 20:49 UTC ( #582160=perlquestion: print w/replies, xml ) Need Help??
narashima has asked for the wisdom of the Perl Monks concerning the following question:

Revered Monks,
What is return value of qx ? I tried doing the following but I did not get any value for $status.
$status = qx/cat new1 >new/; print "value of status is $status \n";
The output of the code above is:

"Value of status is "

Could anyone enlighten me please.


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Re: Question on qx
by BUU (Prior) on Nov 03, 2006 at 20:53 UTC
    The output of qx// is whatever the program inside's STDOUT is. In your specific case you send all of the program's STDOUT to a file, so there is none left for perl to read.
      if BUU's explanation wasn't enough, perhaps perlop can help
        If you're looking for the return code of the command you're running, you can use system().

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Node Type: perlquestion [id://582160]
Approved by Paladin
[Discipulus]: ovedpo15 A subroutine may be called using an explicit & prefix. The & is optional in modern Perl... see perlsub in docs and search for ampersand
[Discipulus]: it has some, even dangerous, implication
[Discipulus]: I still use but I also attract many critics for this: I use when I call subs defined in the very same file, just to recognize them. You can avoid (but sometimes is needed)
[marto]: believe it or not this is a SPAM account :P

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