Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Okey-dokey, I can understand frustration with packages that don't allow you to (easily) capture their debugging output.   Please try the following which works on ActiveState 5.6.1 build 635 running on Windows XP.   Amazing, no open's, no close's, but all TIE'd up prettily anyway.
my $data; print STDERR " STDERR test (1)\n"; tie *STDERR, 'IO::Scalar', \$data; print STDERR " STDERR test (2)\n"; untie *STDERR; print STDERR " STDERR test (3)\n"; printf " Scalar string has length %d\n", length($data); printf " and contains '%s'\n", $data;
 STDERR test (1)
 STDERR test (3)
  Scalar string has length 17
    and contains ' STDERR test (2)

Update: Drat, it works wonderfully until you hit submit, then you think of the case that doesn't work.   If I throw in a warn which presumably uses the filehandle more directly:

tie *STDERR, 'IO::Scalar', \$data; print STDERR " STDERR test (2)\n"; warn " STDERR test (2a)"; untie *STDERR;
I then see
 STDERR test (1)
 STDERR test (2a) at line 14.
 STDERR test (3)
  Scalar string has length 17
    and contains ' STDERR test (2)
showing that some output to 'STDERR' isn't going to be captured this way.   So it will very much depend on the way the package outputs to STDERR whether this will work.   Rats!

In reply to Re: Re: Best Way to Redirect STDERR to a Scalar by shenme
in thread Best Way to Redirect STDERR to a Scalar by Mr. Muskrat

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others romping around the Monastery: (6)
    As of 2018-01-24 12:22 GMT
    Find Nodes?
      Voting Booth?
      How did you see in the new year?

      Results (260 votes). Check out past polls.