thanks for the recommendation. Following your suggestion I stumbled upon  Tie::STDOUT (by David Cantrell) which does the trick:

#!/usr/bin/env perl

use strict;
use warnings;

use Tie::STDOUT

print => sub {
    my @params = @_;
    my @calhis = ();
    my $i = 2; # to avoid printing stacktrace for Tie::STDOUT
    # build a kind of stacktrace:
        while(
        my ($package, $filename, $line, $subroutine, $hasargs,
            $wantarray, $evaltext, $is_require, $hints, $bitmask,
        $hinthash) = caller($i++)
    ){
        push(@calhis, "$filename, line $line : $package".'::'."$subrou
+tine");
    }
            # print the stacktrace with whatever needs to be printed
            print join("->", @calhis), " : ", @_;
        }
;

print "from main\n";

sub1("main");
sub2("main");

sub    sub1 {
    my $via = $_[0];
    print "from sub1 via $via\n";
}
sub    sub2 {
    sub1("sub2");
}

[download]

In reply to Re^2: Override printing to STDOUT/ERR by bliako
in thread Override printing to STDOUT/ERR by bliako

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