The problem came in when I tried to do the same with STDERR. In this case all the output from STDERR disappeared. If I swapped the STDERR and STDOUT ties done in this manner, I would then get STDERR output and not STDOUT.
That's because you are essentially doing: 
perl -we'open FOO, "> baz"; open BAR, "> baz"; print FOO "one\n"; prin
+t BAR "one\n";'

[download]
where FOO and BAR have independent file pointers into the same file. If you want to share a logfile between two handles, use >> to force all writes to append at the end, or open the file outside the tie handler and pass its glob to your logger.

This works for me: 

use InstallerHandleTie;

my $gfh = *STDOUT;
my $geh = *STDERR;

foreach my $outfile (qw/log1 log2/) {
        open my $outfh, ">", $outfile or die "nope: $!";

   local *STDOUT;
   local *STDERR;

      tie *STDOUT, 'InstallerHandleTie', $outfh, $gfh;
      tie *STDERR, 'InstallerHandleTie', $outfh, $geh;
      print "Writing to $outfile\n";
      warn "Writing warning to $outfile\n";
      untie *STDOUT;
      untie *STDERR;
}

[download]

In reply to Re^3: Porting Perl 5.6 to Perl 5.8 issue with self-tie by ysth
in thread Porting Perl 5.6 to Perl 5.8 issue with self-tie by fwashbur

Title:
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, details, 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, summary, 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.