#!/usr/bin/perl -w

use strict;
use FileHandle;

printf("fileno(*STDOUT) = %d\n", fileno(*STDOUT));  # 1
printf("fileno(*STDERR) = %d\n", fileno(*STDERR));  # 2

open SAVED_STDOUT, ">&STDOUT" or die "couldn't save STDOUT: $!\n";
open SAVED_STDERR, ">&STDERR" or die "couldn't save STDERR: $!\n";

print SAVED_STDOUT "";  # to suppress warning about possible typo
print SAVED_STDERR "";  # to suppress warning about possible typo

my $captured_output = "";

close STDOUT;
open STDOUT, ">", \$captured_output
or die "couldn't re-open STDOUT: $!\n";

close STDERR;
#open STDERR, ">&STDOUT" or die "couldn't re-open STDERR: $!\n";
*STDERR = *STDOUT;

printf SAVED_STDOUT ("fileno(*STDOUT) = %d\n", fileno(*STDOUT));  # -1
printf SAVED_STDOUT ("fileno(*STDERR) = %d\n", fileno(*STDERR));  # -1

print "testing stdout capture 1\n";
print STDERR "testing stderr capture\n";
print "testing stdout capture 2\n";

close STDOUT; open STDOUT, ">&SAVED_STDOUT";
close STDERR; open STDERR, ">&SAVED_STDERR";

print $captured_output, "\n";

##</code><code>##

#!/usr/bin/perl -w

use strict;

my $captured_output = "";

{
   local *STDOUT;
   open STDOUT, ">", \$captured_output
   or die "couldn't re-open STDOUT: $!\n";

   local *STDERR = *STDOUT;

   print "testing stdout capture 1\n";
   print STDERR "testing stderr capture\n";
   print "testing stdout capture 2\n";
}

print $captured_output, "\n";