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diff --git a/t/op/exec.t b/t/op/exec.t
old mode 100644
new mode 100755
index f3012fd..c23364b
--- a/t/op/exec.t
+++ b/t/op/exec.t
@@ -1,21 +1,129 @@
 #!./perl
 
-# $Header: exec.t,v 4.0 91/03/20 01:52:25 lwall Locked $
+BEGIN {
+    chdir 't' if -d 't';
+    @INC = ('../lib');
+    require './test.pl';
+}
+
+# supress VMS whinging about bad execs.
+use vmsish qw(hushed);
 
 $| = 1;				# flush stdout
-print "1..8\n";
 
-print "not ok 1\n" if system "echo ok \\1";	# shell interpreted
-print "not ok 2\n" if system "echo ok 2";	# split and directly called
-print "not ok 3\n" if system "echo", "ok", "3"; # directly called
+$ENV{LC_ALL}   = 'C';		# Forge English error messages.
+$ENV{LANGUAGE} = 'C';		# Ditto in GNU.
+
+my $Is_VMS   = $^O eq 'VMS';
+my $Is_Win32 = $^O eq 'MSWin32';
+
+skip_all("Tests mostly usesless on MacOS") if $^O eq 'MacOS';
+
+plan(tests => 22);
+
+my $Perl = which_perl();
+
+my $exit;
+SKIP: {
+    skip("bug/feature of pdksh", 2) if $^O eq 'os2';
+
+    my $tnum = curr_test();
+    $exit = system qq{$Perl -le "print q{ok $tnum - interp system(EXPR)"}};
+    next_test();
+    is( $exit, 0, '  exited 0' );
+}
+
+my $tnum = curr_test();
+$exit = system qq{$Perl -le "print q{ok $tnum - split & direct system(EXPR)"}};
+next_test();
+is( $exit, 0, '  exited 0' );
+
+# On VMS and Win32 you need the quotes around the program or it won't work.
+# On Unix its the opposite.
+my $quote = $Is_VMS || $Is_Win32 ? '"' : '';
+$tnum = curr_test();
+$exit = system $Perl, '-le', 
+               "${quote}print q{ok $tnum - system(PROG, LIST)}${quote}";
+next_test();
+is( $exit, 0, '  exited 0' );
+
+
+# Some basic piped commands.  Some OS's have trouble with "helpfully"
+# putting newlines on the end of piped output.  So we split this into
+# newline insensitive and newline sensitive tests.
+my $echo_out = `$Perl -e "print 'ok'" | $Perl -le "print <STDIN>"`;
+$echo_out =~ s/\n\n/\n/g;
+is( $echo_out, "ok\n", 'piped echo emulation');
+
+{
+    # here we check if extra newlines are going to be slapped on
+    # piped output.
+    local $TODO = 'VMS sticks newlines on everything' if $Is_VMS;
+
+    is( scalar `$Perl -e "print 'ok'"`,
+        "ok", 'no extra newlines on ``' );
+
+    is( scalar `$Perl -e "print 'ok'" | $Perl -e "print <STDIN>"`, 
+        "ok", 'no extra newlines on pipes');
+
+    is( scalar `$Perl -le "print 'ok'" | $Perl -le "print <STDIN>"`, 
+        "ok\n\n", 'doubled up newlines');
+
+    is( scalar `$Perl -e "print 'ok'" | $Perl -le "print <STDIN>"`, 
+        "ok\n", 'extra newlines on inside pipes');
+
+    is( scalar `$Perl -le "print 'ok'" | $Perl -e "print <STDIN>"`, 
+        "ok\n", 'extra newlines on outgoing pipes');
+
+    {
+	local($/) = \2;       
+	$out = runperl(prog => 'print q{1234}');
+	is($out, "1234", 'ignore $/ when capturing output in scalar context');
+    }
+}
+
+
+is( system(qq{$Perl -e "exit 0"}), 0,     'Explicit exit of 0' );
+
+my $exit_one = $Is_VMS ? 4 << 8 : 1 << 8;
+is( system(qq{$Perl "-I../lib" -e "use vmsish qw(hushed); exit 1"}), $exit_one,
+    'Explicit exit of 1' );
+
+$rc = system { "lskdfj" } "lskdfj";
+unless( ok($rc == 255 << 8 or $rc == -1 or $rc == 256 or $rc == 512) ) {
+    print "# \$rc == $rc\n";
+}
+
+unless ( ok( $! == 2  or  $! =~ /\bno\b.*\bfile/i or  
+             $! == 13 or  $! =~ /permission denied/i or
+             $! == 22 or  $! =~ /invalid argument/i  ) ) {
+    printf "# \$! eq %d, '%s'\n", $!, $!;
+}
+
 
-if (system "true") {print "not ok 4\n";} else {print "ok 4\n";}
+is( `$Perl -le "print 'ok'"`,   "ok\n",     'basic ``' );
+is( <<`END`,                    "ok\n",     '<<`HEREDOC`' );
+$Perl -le "print 'ok'"
+END
 
-if ((system "/bin/sh -c 'exit 1'") != 256) { print "not "; }
-print "ok 5\n";
+{
+    my $_ = qq($Perl -le "print 'ok'");
+    is( readpipe, "ok\n", 'readpipe default argument' );
+}
 
-if ((system "lskdfj") == 255 << 8) {print "ok 6\n";} else {print "not ok 6\n";}
+TODO: {
+    my $tnum = curr_test();
+    if( $^O =~ /Win32/ ) {
+        print "not ok $tnum - exec failure doesn't terminate process " .
+              "# TODO Win32 exec failure waits for user input\n";
+        next_test();
+        last TODO;
+    }
 
-unless (exec "lskdjfalksdjfdjfkls") {print "ok 7\n";} else {print "not ok 7\n";}
+    ok( !exec("lskdjfalksdjfdjfkls"), 
+        "exec failure doesn't terminate process");
+}
 
-exec "echo","ok","8";
+my $test = curr_test();
+exec $Perl, '-le', qq{${quote}print 'ok $test - exec PROG, LIST'${quote}};
+fail("This should never be reached if the exec() worked");