1#!./perl
2
3use Config;
4
5BEGIN {
6    if($ENV{PERL_CORE}) {
7        if ($Config{'extensions'} !~ /\bIO\b/) {
8	    print "1..0 # Skip: IO extension not compiled\n";
9	    exit 0;
10        }
11    }
12}
13
14use IO::Handle;
15use IO::File;
16
17select(STDERR); $| = 1;
18select(STDOUT); $| = 1;
19
20print "1..6\n";
21
22print "ok 1\n";
23
24my $dupout = IO::Handle->new->fdopen( \*STDOUT ,"w");
25my $duperr = IO::Handle->new->fdopen( \*STDERR ,"w");
26
27my $stdout = \*STDOUT; bless $stdout, "IO::File"; # "IO::Handle";
28my $stderr = \*STDERR; bless $stderr, "IO::Handle";
29
30$stdout->open( "Io.dup","w") || die "Can't open stdout";
31$stderr->fdopen($stdout,"w");
32
33print $stdout "ok 2\n";
34print $stderr "ok 3\n";
35
36# Since some systems don't have echo, we use Perl.
37my $echo = qq{$^X -le "print q(ok %d)"};
38
39my $cmd = sprintf $echo, 4;
40print `$cmd`;
41
42$cmd = sprintf "$echo 1>&2", 5;
43$cmd = sprintf $echo, 5 if $^O eq 'MacOS';
44print `$cmd`;
45
46$stderr->close;
47$stdout->close;
48
49$stdout->fdopen($dupout,"w");
50$stderr->fdopen($duperr,"w");
51
52if ($^O eq 'MSWin32' || $^O eq 'NetWare' || $^O eq 'VMS') { print `type Io.dup` }
53elsif ($^O eq 'MacOS') { system 'Catenate Io.dup' }
54else                   { system 'cat Io.dup' }
55unlink 'Io.dup';
56
57print STDOUT "ok 6\n";
58