stderr to script-logfile with CGI::Fast

[poulhs]

Seeking the wisdom of the monks...

I am trying to redirect stderr to a script-specific logfile from a CGI::Fast script:

#!/usr/bin/perl
use strict;
use warnings;
use English qw( no_match_vars );
use Fcntl;
use CGI::Fast;
our $errlog;
BEGIN {
    $errlog = "/var/tmp/foo.log";
    sysopen( STDERR, $errlog, O_WRONLY | O_CREAT | O_APPEND )
      or warn( "Failed to open $errlog: $ERRNO" );
}
warn( "OK\n" );
while (my $q = CGI::Fast->new()) {
    print
      $q->header(),
      $q->start_html( sprintf( "%2.2d:%2.2d:%2.2d", ( localtime($^T) )
+[2,1,0] ) ),
      $q->h1( scalar localtime( $^T ) ),
      $q->code( "pid=$$ errlog=$errlog" ),
      $q->end_html,"\n";
    warn( "NOT OK\n" );
}
__END__

The "problem" seems to be, that CGI::Fast->new() (which is calling FCGI::accept()), resets STDERR. I've even tried misc. stuff after the CGI::Fast->new(), like reopening sysopen( STDERR, $errlog, ... ) and more obfuscating stuff like my $req = $FCGI::global_request; followed by misc. dup'ing and/or *STDERR = ...

Anyone got a solution to this problem (or tinks it is unsolvable)?

ps: I have no problems with $SIG{__WARN__} and $SIG{__DIE__} handlers, but would really like to redirect STDERR completely.

amen