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#!./perl
# $Header: io.pipe,v 2.0 88/06/05 00:13:05 root Exp $
$| = 1;
print "1..4\n";
open(PIPE, "|-") || (exec 'tr', '[A-Z]', '[a-z]');
print PIPE "OK 1\n";
print PIPE "ok 2\n";
close PIPE;
if (open(PIPE, "-|")) {
while(<PIPE>) {
print;
}
}
else {
print stdout "ok 3\n";
exec 'echo', 'ok 4';
}
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