[inseparable changes from match from perl-5.003_90 to perl-5.003_91]

 BUILD PROCESS

Subject: Sanity check linking with $libs
Date: Tue, 25 Feb 1997 14:13:45 -0500 (EST)
From: Andy Dougherty <doughera@fractal.phys.lafayette.edu>
Files: Configure
Msg-ID: <Pine.SOL.3.95q.970225221634.2486A-100000@fractal.lafayette.edu>

    (applied based on p5p patch as commit 5c37e92e59bb92e49d5a21017cd6dc066a28ddea)

Subject: Flush stdout when printing $randbits guess
From: Chip Salzenberg <chip@perl.com>
Files: Configure

Subject: Configure changes for Irix nm
From: Helmut Jarausch <helmutjarausch@unknown>
Files: Configure

 CORE LANGUAGE CHANGES

Subject: Fix perl_call_*() when !G_EVAL
Date: Tue, 25 Feb 1997 02:25:56 -0500
From: Gurusamy Sarathy <gsar@engin.umich.edu>
Files: MANIFEST gv.c interp.sym perl.c perl.h pp_ctl.c pp_sys.c t/op/runlevel.t
Msg-ID: <199702250725.CAA09192@aatma.engin.umich.edu>, <199702251925.OAA15498@aatma.engin.umich.edu>, <199702252200.RAA16853@aatma.engin.umich.edu>

    (applied based on p5p patch as commits 40f788c454d994616342c409de5b5d181ad9b8af, and 907a881cde89c56bc61d3f314c0efb8754ca472a, 20efc0829f6564c44574762adb07e8865bc14026)

Subject: Fix taint tests for writeable dirs in $ENV{PATH}
From: Chip Salzenberg <chip@perl.com>
Files: mg.c mg.h pod/perlsec.pod taint.c

Subject: Forbid tainted parameters for truncate()
From: Chip Salzenberg <chip@perl.com>
Files: pp_sys.c

Subject: Don't taint magic hash keys unnecessarily
Date: Fri, 28 Feb 1997 02:11:26 -0500 (EST)
From: Charles Bailey <bailey@HMIVAX.HUMGEN.UPENN.EDU>
Files: hv.c

    private-msgid: <01IFXL9TY74Y00661G@hmivax.humgen.upenn.edu>

 CORE PORTABILITY

Subject: VMS patches post _90
Date: Fri, 28 Feb 1997 15:26:33 -0500 (EST)
From: Charles Bailey <bailey@HMIVAX.HUMGEN.UPENN.EDU>
Files: doio.c mg.c perl.h pp_hot.c t/op/rand.t t/op/taint.t taint.c vms/descrip.mms vms/vms.c

    private-msgid: <01IFYDE5ZT7O005A53@hmivax.humgen.upenn.edu>

Subject: Fix taint check in system() and exec() under VMS and OS/2
From: Chip Salzenberg <chip@perl.com>
Files: pp_sys.c

Subject: If _XOPEN_VERSION >= 4, socket length parameters are size_t
From: Michael H. Moran <mhm@austin.ibm.com>
Files: perl.h pp_sys.c

Subject: Make dooneliner() compile again
From: Chip Salzenberg <chip@perl.com>
Files: pp_sys.c

 DOCUMENTATION

Subject: Move ENVIRONMENT from perl.pod to perlrun.pod
From: Chip Salzenberg <chip@perl.com>
Files: pod/perl.pod pod/perlrun.pod

Subject: Describe PERL_DEBUG_MSTATS in perlrun.pod
From: Nat <gnat@frii.com>
Files: pod/perlrun.pod

Subject: Fix references to perlbug
From: Chip Salzenberg <chip@perl.com>
Files: pod/perl.pod pod/perldelta.pod pod/perllocale.pod pod/perltoc.pod

 OTHER CORE CHANGES

Subject: Short-circuit duplicate study() calls
From: Chip Salzenberg <chip@perl.com>
Files: pp.c

Subject: Call sv_set[iu]v() with [IU]V parameter, not [IU]32
From: Chip Salzenberg <chip@perl.com>
Files: perl.c pp.c pp_sys.c toke.c util.c

Subject: Clean up and document API for hashes
Date: Tue, 25 Feb 1997 13:24:02 -0500
From: Gurusamy Sarathy <gsar@engin.umich.edu>
Files: hv.c hv.h pod/perldelta.pod pod/perlguts.pod
Msg-ID: <199702251824.NAA14859@aatma.engin.umich.edu>

    (applied based on p5p patch as commit a61fe43df197fcc70e6f310c06ee17d52b606c45)

Subject: pp_undef was not always freeing memory
Date: Thu, 27 Feb 1997 01:53:51 -0500 (EST)
From: Ilya Zakharevich <ilya@math.ohio-state.edu>
Files: pp.c
Msg-ID: <199702270653.BAA13949@monk.mps.ohio-state.edu>

    (applied based on p5p patch as commit 1da885048b65b5be1bd3077c6fc45f92c567e1b5)

Subject: Don't examine rx->exec_tainted if pregexec() fails
From: Chip Salzenberg <chip@perl.com>
Files: pp_hot.c

 TESTS

Subject: New test op/taint.t
Date: Tue, 25 Feb 1997 11:36:53 -0800 (PST)
From: Tom Phoenix <rootbeer@teleport.com>
Files: MANIFEST t/op/taint.t

    private-msgid: <Pine.GSO.3.95q.970225101328.18288M-100000@kelly.teleport.com

Subject: Patch to t/op/rand.t
Date: Tue, 25 Feb 1997 18:19:34 -0800 (PST)
From: Tom Phoenix <rootbeer@teleport.com>
Files: t/op/rand.t

    private-msgid: <Pine.GSO.3.95q.970225181321.13796Q-100000@kelly.teleport.com

 UTILITIES

Subject: Add --lax option to pod2man; use it in perldoc
From: Nat <gnat@frii.com>
Files: pod/pod2man.PL utils/perldoc.PL

Subject: Eliminate dead code in pod2man
From: Chip Salzenberg <chip@perl.com>
Files: pod/pod2man.PL

3 files changed, 730 insertions, 3 deletions

diff --git a/t/op/rand.t b/t/op/rand.t
index 9e4d69284e..4eeca6b10c 100755
--- a/t/op/rand.t
+++ b/t/op/rand.t
@@ -74,13 +74,13 @@ sub bits ($) {
     # reason that the diagnostic message might get the
     # wrong value is that Config.pm is incorrect.)
     #
-    if ($max <= 0) {	# Just in case...
+    if ($max <= 0 or $max >= (1 << $randbits)) {	# Just in case...
 	print "not ok 1\n";
 	print "# This perl was compiled with randbits=$randbits\n";
 	print "# which is _way_ off. Or maybe your system rand is broken,\n";
 	print "# or your C compiler can't multiply, or maybe Martians\n";
 	print "# have taken over your computer. For starters, see about\n";
-	print "# trying a better value for randbits.\n";
+	print "# trying a better value for randbits, probably smaller.\n";
 	# If that isn't the problem, we'll have
 	# to put d_martians into Config.pm 
 	print "# Skipping remaining tests until randbits is fixed.\n";
@@ -329,7 +329,12 @@ AUTOSRAND:
 
     my($pid, $first);
     for (1..5) {
-	$pid = open PERL, "./perl -e 'print rand'|";
+	if ($^O eq 'VMS') {
+	    $pid = open PERL, qq[MCR $^X -e "print rand"|];
+	}
+	else {
+	    $pid = open PERL, "./perl -e 'print rand'|";
+	}
 	die "Couldn't pipe from perl: $!" unless defined $pid;
 	if (defined $first) {
 	    if ($first ne <PERL>) {
diff --git a/t/op/runlevel.t b/t/op/runlevel.t
new file mode 100644
index 0000000000..ca6aac5e5b
--- /dev/null
+++ b/t/op/runlevel.t
@@ -0,0 +1,308 @@
+#!./perl
+
+##
+## all of these tests are from Michael Schroeder
+## <Michael.Schroeder@informatik.uni-erlangen.de>
+##
+## The more esoteric failure modes require Michael's
+## stack-of-stacks patch (so we don't test them here,
+## and they are commented out before the __END__).
+##
+## The remaining tests pass with a simpler fix
+## intended for 5.004
+##
+## Gurusamy Sarathy <gsar@umich.edu> 97-02-24
+##
+
+chdir 't' if -d 't';
+@INC = "../lib";
+$ENV{PERL5LIB} = "../lib";
+
+$|=1;
+
+undef $/;
+@prgs = split "\n########\n", <DATA>;
+print "1..", scalar @prgs, "\n";
+
+$tmpfile = "runltmp000";
+1 while -f ++$tmpfile;
+END { unlink $tmpfile if $tmpfile; }
+
+for (@prgs){
+    my $switch;
+    if (s/^\s*-\w+//){
+       $switch = $&;
+    }
+    my($prog,$expected) = split(/\nEXPECT\n/, $_);
+    open TEST, "| sh -c './perl $switch' >$tmpfile 2>&1";
+    print TEST $prog, "\n";
+    close TEST;
+    $status = $?;
+    $results = `cat $tmpfile`;
+    $results =~ s/\n+$//;
+    $expected =~ s/\n+$//;
+    if ( $results ne $expected){
+       print STDERR "PROG: $switch\n$prog\n";
+       print STDERR "EXPECTED:\n$expected\n";
+       print STDERR "GOT:\n$results\n";
+       print "not ";
+    }
+    print "ok ", ++$i, "\n";
+}
+
+=head2 stay out of here (the real tests are after __END__)
+
+##
+## these tests don't pass yet (need the full stack-of-stacks patch)
+## GSAR 97-02-24
+##
+
+########
+# sort within sort
+sub sortfn {
+  (split(/./, 'x'x10000))[0];
+  my (@y) = ( 4, 6, 5);
+  @y = sort { $a <=> $b } @y;
+  print "sortfn ".join(', ', @y)."\n";
+  return $_[0] <=> $_[1];
+}
+@x = ( 3, 2, 1 );
+@x = sort { &sortfn($a, $b) } @x;
+print "---- ".join(', ', @x)."\n";
+EXPECT
+sortfn 4, 5, 6
+---- 1, 2, 3
+########
+# trapping eval within sort (doesn't work currently because
+# die does a SWITCHSTACK())
+@a = (3, 2, 1);
+@a = sort { eval('die("no way")') ,  $a <=> $b} @a;
+print join(", ", @a)."\n";
+EXPECT
+1, 2, 3
+########
+# this actually works fine, but results in a poor error message
+@a = (1, 2, 3);
+foo:
+{
+  @a = sort { last foo; } @a;
+}
+EXPECT
+cannot reach destination block at - line 2.
+########
+package TEST;
+ 
+sub TIESCALAR {
+  my $foo;
+  return bless \$foo;
+}
+sub FETCH {
+  next;
+  return "ZZZ";
+}
+sub STORE {
+}
+ 
+package main;
+ 
+tie $bar, TEST;
+{
+  print "- $bar\n";
+}
+print "OK\n";
+EXPECT
+cannot reach destination block at - line 8.
+########
+package TEST;
+ 
+sub TIESCALAR {
+  my $foo;
+  return bless \$foo;
+}
+sub FETCH {
+  goto bbb;
+  return "ZZZ";
+}
+ 
+package main;
+ 
+tie $bar, TEST;
+print "- $bar\n";
+exit;
+bbb:
+print "bbb\n";
+EXPECT
+bbb
+########
+# trapping eval within sort (doesn't work currently because
+# die does a SWITCHSTACK())
+sub foo {
+  $a <=> $b unless eval('$a == 0 ? die("foo\n") : ($a <=> $b)');
+}
+@a = (3, 2, 0, 1);
+@a = sort foo @a;
+print join(', ', @a)."\n";
+EXPECT
+0, 1, 2, 3
+########
+package TEST;
+sub TIESCALAR {
+  my $foo;
+  next;
+  return bless \$foo;
+}
+package main;
+{
+tie $bar, TEST;
+}
+EXPECT
+cannot reach destination block at - line 4.
+########
+# large stack extension causes realloc, and segfault
+package TEST;
+sub TIESCALAR {
+  my $foo;
+  return bless \$foo;
+}
+sub FETCH {
+  return "fetch";
+}
+sub STORE {
+(split(/./, 'x'x10000))[0];
+}
+package main;
+tie $bar, TEST;
+$bar = "x";
+
+=cut
+
+##
+##
+## The real tests begin here
+##
+##
+
+__END__
+@a = (1, 2, 3);
+{
+  @a = sort { last ; } @a;
+}
+EXPECT
+Can't "last" outside a block at - line 3.
+########
+package TEST;
+ 
+sub TIESCALAR {
+  my $foo;
+  return bless \$foo;
+}
+sub FETCH {
+  eval 'die("test")';
+  print "still in fetch\n";
+  return ">$@<";
+}
+package main;
+ 
+tie $bar, TEST;
+print "- $bar\n";
+EXPECT
+still in fetch
+- >test at (eval 1) line 1.
+<
+########
+package TEST;
+ 
+sub TIESCALAR {
+  my $foo;
+  eval('die("foo\n")');
+  print "after eval\n";
+  return bless \$foo;
+}
+sub FETCH {
+  return "ZZZ";
+}
+ 
+package main;
+ 
+tie $bar, TEST;
+print "- $bar\n";
+print "OK\n";
+EXPECT
+after eval
+- ZZZ
+OK
+########
+package TEST;
+ 
+sub TIEHANDLE {
+  my $foo;
+  return bless \$foo;
+}
+sub PRINT {
+print STDERR "PRINT CALLED\n";
+(split(/./, 'x'x10000))[0];
+eval('die("test\n")');
+}
+ 
+package main;
+ 
+open FH, ">&STDOUT";
+tie *FH, TEST;
+print FH "OK\n";
+print "DONE\n";
+EXPECT
+PRINT CALLED
+DONE
+########
+sub warnhook {
+  print "WARNHOOK\n";
+  eval('die("foooo\n")');
+}
+$SIG{'__WARN__'} = 'warnhook';
+warn("dfsds\n");
+print "END\n";
+EXPECT
+WARNHOOK
+END
+########
+package TEST;
+ 
+use overload
+     "\"\""   =>  \&str
+;
+ 
+sub str {
+  eval('die("test\n")');
+  return "STR";
+}
+ 
+package main;
+ 
+$bar = bless {}, TEST;
+print "$bar\n";
+print "OK\n";
+EXPECT
+STR
+OK
+########
+sub foo {
+  $a <=> $b unless eval('$a == 0 ? bless undef : ($a <=> $b)');
+}
+@a = (3, 2, 0, 1);
+@a = sort foo @a;
+print join(', ', @a)."\n";
+EXPECT
+0, 1, 2, 3
+########
+sub foo {
+  goto bar if $a == 0;
+  $a <=> $b;
+}
+@a = (3, 2, 0, 1);
+@a = sort foo @a;
+print join(', ', @a)."\n";
+exit;
+bar:
+print "bar reached\n";
+EXPECT
+Can't "goto" outside a block at - line 2.
diff --git a/t/op/taint.t b/t/op/taint.t
new file mode 100644
index 0000000000..32277181f6
--- /dev/null
+++ b/t/op/taint.t
@@ -0,0 +1,414 @@
+#!./perl -T
+#
+# Taint tests by Tom Phoenix <rootbeer@teleport.com>.
+#
+# I don't claim to know all about tainting. If anyone sees
+# tests that I've missed here, please add them. But this is 
+# better than having no tests at all, right?
+#
+
+BEGIN {
+    chdir 't' if -d 't';
+    @INC = '../lib' if -d '../lib';
+}
+
+use strict;
+use Config;
+
+my $Is_VMS = $^O eq 'VMS';
+my $Invoke_Perl = $Is_VMS ? 'MCR Sys$Disk:[]Perl.' : './perl';
+if ($Is_VMS) {
+    eval <<EndOfCleanup;
+	END {
+	    \$ENV{PATH} = '';
+	    warn "# Note: logical name 'PATH' may have been deleted\n";
+	    \$ENV{IFS} =  "$ENV{IFS}";
+	    \$ENV{'DCL\$PATH'} = "$ENV{'DCL$PATH'}";
+	}
+EndOfCleanup
+}
+
+# Sources of taint:
+#   The empty tainted value, for tainting strings
+my $TAINT = substr($^X, 0, 0);
+#   A tainted zero, useful for tainting numbers
+my $TAINT0 = 0 + $TAINT;
+
+# This taints each argument passed. All must be lvalues.
+# Side effect: It also stringifies them. :-(
+sub taint_these (@) {
+    for (@_) { $_ .= $TAINT }
+}
+
+# How to identify taint when you see it
+sub any_tainted (@) {
+    not eval { join("",@_), kill 0; 1 };
+}
+sub tainted ($) {
+    any_tainted @_;
+}
+sub all_tainted (@) {
+    for (@_) { return 0 unless tainted $_ }
+    1;
+}
+
+sub test ($$;$) {
+    my($serial, $boolean, $diag) = @_;
+    if ($boolean) {
+	print "ok $serial\n";
+    } else {
+	print "not ok $serial\n";
+	for (split m/^/m, $diag) {
+	    print "# $_";
+	}
+	print "\n" unless 
+	    $diag eq ''
+	    or substr($diag, -1) eq "\n";
+    }
+}
+
+# We need an external program to call.
+my $ECHO = "./echo$$";
+END { unlink $ECHO }
+open PROG, "> $ECHO" or die "Can't create $ECHO: $!";
+print PROG 'print "@ARGV\n"', "\n";
+close PROG;
+my $echo = "$Invoke_Perl $ECHO";
+
+print "1..96\n";
+
+# First, let's make sure that Perl is checking the dangerous
+# environment variables. Maybe they aren't set yet, so we'll
+# taint them ourselves.
+{
+    $ENV{'DCL$PATH'} = '' if $Is_VMS;
+
+    $ENV{PATH} = $TAINT;
+    $ENV{IFS} = '';
+    test 1, eval { `$echo 1` } eq '';
+    test 2, $@ =~ /^Insecure \$ENV{PATH}/, $@;
+
+    $ENV{PATH} = '';
+    $ENV{IFS} = $TAINT;
+    test 3, eval { `$echo 1` } eq '';
+    test 4, $@ =~ /^Insecure \$ENV{IFS}/, $@;
+
+    my ($tmp) = grep { (stat)[2] & 2 } '/tmp', '/var/tmp', '/usr/tmp';
+    if ($tmp) {
+	$ENV{PATH} = $tmp;
+	test 5, eval { `$echo 1` } eq '';
+	test 6, $@ =~ /^Insecure directory in \$ENV{PATH}/, $@;
+    }
+    else {
+	print "# can't find writeable directory to test PATH tainting\n";
+	for (5..6) { print "ok $_\n" }
+    }
+
+    $ENV{PATH} = '';
+    $ENV{IFS} = '';
+    test 7, eval { `$echo 1` } eq "1\n";
+    test 8, $@ eq '', $@;
+
+    if ($Is_VMS) {
+	$ENV{'DCL$PATH'} = $TAINT;
+	test 9,  eval { `$echo 1` } eq '';
+	test 10, $@ =~ /^Insecure \$ENV{DCL\$PATH}/, $@;
+	$ENV{'DCL$PATH'} = '';
+    }
+    else {
+	print "# This is not VMS\n";
+	for (9..10) { print "ok $_\n"; }
+    }
+}
+
+# Let's see that we can taint and untaint as needed.
+{
+    my $foo = $TAINT;
+    test 11, tainted $foo;
+
+    $foo = "foo";
+    test 12, not tainted $foo;
+
+    taint_these($foo);
+    test 13, tainted $foo;
+
+    my @list = 1..10;
+    test 14, not any_tainted @list;
+    taint_these @list[1,3,5,7,9];
+    test 15, any_tainted @list;
+    test 16, all_tainted @list[1,3,5,7,9];
+    test 17, not any_tainted @list[0,2,4,6,8];
+
+    ($foo) = $foo =~ /(.+)/;
+    test 18, not tainted $foo;
+
+    $foo = $1 if ('bar' . $TAINT) =~ /(.+)/;
+    test 19, not tainted $foo;
+    test 20, $foo eq 'bar';
+
+    my $pi = 4 * atan2(1,1) + $TAINT0;
+    test 21, tainted $pi;
+
+    ($pi) = $pi =~ /(\d+\.\d+)/;
+    test 22, not tainted $pi;
+    test 23, sprintf("%.5f", $pi) eq '3.14159';
+}
+
+# How about command-line arguments? The problem is that we don't
+# always get some, so we'll run another process with some.
+{
+    my $arg = "./arg$$";
+    open PROG, "> $arg" or die "Can't create $arg: $!";
+    print PROG q{
+	eval { join('', @ARGV), kill 0 };
+	exit 0 if $@ =~ /^Insecure dependency/;
+	print "# Oops: \$@ was [$@]\n";
+	exit 1;
+    };
+    close PROG;
+    print `$Invoke_Perl "-T" $arg and some suspect arguments`;
+    test 24, !$?, "Exited with status $?";
+    unlink $arg;
+}
+
+# Reading from a file should be tainted
+{
+    my $file = './perl' . $Config{exe_ext};
+    test 25, open(FILE, $file), "Couldn't open '$file': $!";
+
+    my $block;
+    sysread(FILE, $block, 100);
+    my $line = <FILE>;		# Should "work"
+    close FILE;
+    test 26, tainted $block;
+    test 27, tainted $line;
+}
+
+# Globs should be tainted. 
+{
+    my @globs = <*>;
+    test 28, all_tainted @globs;
+
+    @globs = glob '*';
+    test 29, all_tainted @globs;
+}
+
+# Output of commands should be tainted
+{
+    my $foo = `$echo abc`;
+    test 30, tainted $foo;
+}
+
+# Certain system variables should be tainted
+{
+    test 31, all_tainted $^X, $0;
+}
+
+# Results of matching should all be untainted
+{
+    my $foo = "abcdefghi" . $TAINT;
+    test 32, tainted $foo;
+
+    $foo =~ /def/;
+    test 33, not any_tainted $`, $&, $';
+
+    $foo =~ /(...)(...)(...)/;
+    test 34, not any_tainted $1, $2, $3, $+;
+
+    my @bar = $foo =~ /(...)(...)(...)/;
+    test 35, not any_tainted @bar;
+
+    test 36, tainted $foo;	# $foo should still be tainted!
+    test 37, $foo eq "abcdefghi";
+}
+
+# Operations which affect files can't use tainted data.
+{
+    test 38, eval { chmod 0, $TAINT } eq '', 'chmod';
+    test 39, $@ =~ /^Insecure dependency/, $@;
+
+    test 40, eval { truncate 'NoSuChFiLe', $TAINT0 } eq '', 'truncate';
+    test 41, $@ =~ /^Insecure dependency/, $@;
+
+    test 42, eval { rename '', $TAINT } eq '', 'rename';
+    test 43, $@ =~ /^Insecure dependency/, $@;
+
+    test 44, eval { unlink $TAINT } eq '', 'unlink';
+    test 45, $@ =~ /^Insecure dependency/, $@;
+
+    test 46, eval { utime $TAINT } eq '', 'utime';
+    test 47, $@ =~ /^Insecure dependency/, $@;
+
+    if ($Config{d_chown}) {
+	test 48, eval { chown -1, -1, $TAINT } eq '', 'chown';
+	test 49, $@ =~ /^Insecure dependency/, $@;
+    }
+    else {
+	print "# chown() is not available\n";
+	for (48..49) { print "ok $_\n" }
+    }
+
+    if ($Config{d_link}) {
+	test 50, eval { link $TAINT, '' } eq '', 'link';
+	test 51, $@ =~ /^Insecure dependency/, $@;
+    }
+    else {
+	print "# link() is not available\n";
+	for (50..51) { print "ok $_\n" }
+    }
+
+    if ($Config{d_symlink}) {
+	test 52, eval { symlink $TAINT, '' } eq '', 'symlink';
+	test 53, $@ =~ /^Insecure dependency/, $@;
+    }
+    else {
+	print "# symlink() is not available\n";
+	for (52..53) { print "ok $_\n" }
+    }
+}
+
+# Operations which affect directories can't use tainted data.
+{
+    test 54, eval { mkdir $TAINT0, $TAINT } eq '', 'mkdir';
+    test 55, $@ =~ /^Insecure dependency/, $@;
+
+    test 56, eval { rmdir $TAINT } eq '', 'rmdir';
+    test 57, $@ =~ /^Insecure dependency/, $@;
+
+    test 58, eval { chdir $TAINT } eq '', 'chdir';
+    test 59, $@ =~ /^Insecure dependency/, $@;
+
+    if ($Config{d_chroot}) {
+	test 60, eval { chroot $TAINT } eq '', 'chroot';
+	test 61, $@ =~ /^Insecure dependency/, $@;
+    }
+    else {
+	print "# chroot() is not available\n";
+	for (60..61) { print "ok $_\n" }
+    }
+}
+
+# Some operations using files can't use tainted data.
+{
+    my $foo = "imaginary library" . $TAINT;
+    test 62, eval { require $foo } eq '', 'require';
+    test 63, $@ =~ /^Insecure dependency/, $@;
+
+    my $filename = "./taintB$$";	# NB: $filename isn't tainted!
+    END { unlink $filename if defined $filename }
+    $foo = $filename . $TAINT;
+    unlink $filename;	# in any case
+
+    test 64, eval { open FOO, $foo } eq '', 'open for read';
+    test 65, $@ eq '', $@;		# NB: This should be allowed
+    test 66, $! == 2;			# File not found
+
+    test 67, eval { open FOO, "> $foo" } eq '', 'open for write';
+    test 68, $@ =~ /^Insecure dependency/, $@;
+}
+
+# Commands to the system can't use tainted data
+{
+    my $foo = $TAINT;
+
+    if ($^O eq 'amigaos') {
+	print "# open(\"|\") is not available\n";
+	for (69..72) { print "ok $_\n" }
+    }
+    else {
+	test 69, eval { open FOO, "| $foo" } eq '', 'popen to';
+	test 70, $@ =~ /^Insecure dependency/, $@;
+
+	test 71, eval { open FOO, "$foo |" } eq '', 'popen from';
+	test 72, $@ =~ /^Insecure dependency/, $@;
+    }
+
+    test 73, eval { exec $TAINT } eq '', 'exec';
+    test 74, $@ =~ /^Insecure dependency/, $@;
+
+    test 75, eval { system $TAINT } eq '', 'system';
+    test 76, $@ =~ /^Insecure dependency/, $@;
+
+    $foo = "*";
+    taint_these $foo;
+
+    test 77, eval { `$echo 1$foo` } eq '', 'backticks';
+    test 78, $@ =~ /^Insecure dependency/, $@;
+
+    if ($Is_VMS) { # wildcard expansion doesn't invoke shell, so is safe
+	test 79, join('', eval { glob $foo } ) ne '', 'globbing';
+	test 80, $@ eq '', $@;
+    }
+    else {
+	test 79, join('', eval { glob $foo } ) eq '', 'globbing';
+	test 80, $@ =~ /^Insecure dependency/, $@;
+    }
+}
+
+# Operations which affect processes can't use tainted data.
+{
+    test 81, eval { kill 0, $TAINT } eq '', 'kill';
+    test 82, $@ =~ /^Insecure dependency/, $@;
+
+    if ($Config{d_setpgrp}) {
+	test 83, eval { setpgrp 0, $TAINT } eq '', 'setpgrp';
+	test 84, $@ =~ /^Insecure dependency/, $@;
+    }
+    else {
+	print "# setpgrp() is not available\n";
+	for (83..84) { print "ok $_\n" }
+    }
+
+    if ($Config{d_setprior}) {
+	test 85, eval { setpriority 0, $TAINT, $TAINT } eq '', 'setpriority';
+	test 86, $@ =~ /^Insecure dependency/, $@;
+    }
+    else {
+	print "# setpriority() is not available\n";
+	for (85..86) { print "ok $_\n" }
+    }
+}
+
+# Some miscellaneous operations can't use tainted data.
+{
+    if ($Config{d_syscall}) {
+	test 87, eval { syscall $TAINT } eq '', 'syscall';
+	test 88, $@ =~ /^Insecure dependency/, $@;
+    }
+    else {
+	print "# syscall() is not available\n";
+	for (87..88) { print "ok $_\n" }
+    }
+
+    {
+	my $foo = "x" x 979;
+	taint_these $foo;
+	local *FOO;
+	my $temp = "./taintC$$";
+	END { unlink $temp }
+	test 89, open(FOO, "> $temp"), "Couldn't open $temp for write: $!";
+
+	test 90, eval { ioctl FOO, $TAINT, $foo } eq '', 'ioctl';
+	test 91, $@ =~ /^Insecure dependency/, $@;
+
+	if ($Config{d_fcntl}) {
+	    test 92, eval { fcntl FOO, $TAINT, $foo } eq '', 'fcntl';
+	    test 93, $@ =~ /^Insecure dependency/, $@;
+	}
+	else {
+	    print "# fcntl() is not available\n";
+	    for (92..93) { print "ok $_\n" }
+	}
+
+	close FOO;
+    }
+}
+
+# Some tests involving references 
+{
+    my $foo = 'abc' . $TAINT;
+    my $fooref = \$foo;
+    test 94, not tainted $fooref;
+    test 95, tainted $$fooref;
+    test 96, tainted $foo;
+}