view release on metacpan or  search on metacpan

misc/pX/Common/Regexp-Test-Perl5Tests/t/op/taint.t  view on Meta::CPAN

my $Invoke_Perl = $Is_VMS      ? 'MCR Sys$Disk:[]Perl.' :
                  $Is_MSWin32  ? '.\perl'               :
                  $Is_MacOS    ? ':perl'                :
                  $Is_NetWare  ? 'perl'                 : 
                                 './perl'               ;
my @MoreEnv = qw/IFS CDPATH ENV BASH_ENV/;

if ($Is_VMS) {
    my (%old, $x);
    for $x ('DCL$PATH', @MoreEnv) {
	($old{$x}) = $ENV{$x} =~ /^(.*)$/ if exists $ENV{$x};
    }
    eval <<EndOfCleanup;
	END {
	    \$ENV{PATH} = '' if $Config{d_setenv};
	    warn "# Note: logical name 'PATH' may have been deleted\n";
	    \@ENV{keys %old} = values %old;
	}
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;
{
    no warnings;
    $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($ok, $diag) = @_;

    my $curr_test = curr_test();

    if ($ok) {
	print "ok $curr_test\n";
    } else {
	print "not ok $curr_test\n";
        printf "# Failed test at line %d\n", (caller)[2];
	for (split m/^/m, $diag) {
	    print "# $_";
	}
	print "\n" unless
	    $diag eq ''
	    or substr($diag, -1) eq "\n";
    }

    next_test();

    return $ok;
}

# We need an external program to call.
my $ECHO = ($Is_MSWin32 ? ".\\echo$$" : $Is_MacOS ? ":echo$$" : ($Is_NetWare ? "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";

my $TEST = catfile(curdir(), 'TEST');

# 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;

    if ($Is_MSWin32 && $Config{ccname} =~ /bcc32/ && ! -f 'cc3250mt.dll') {
	my $bcc_dir;
	foreach my $dir (split /$Config{path_sep}/, $ENV{PATH}) {
	    if (-f "$dir/cc3250mt.dll") {
		$bcc_dir = $dir and last;
	    }
	}
	if (defined $bcc_dir) {
	    require File::Copy;
	    File::Copy::copy("$bcc_dir/cc3250mt.dll", '.') or
		die "$0: failed to copy cc3250mt.dll: $!\n";
	    eval q{
		END { unlink "cc3250mt.dll" }
	    };
	}
    }

    $ENV{PATH} = '';
    delete @ENV{@MoreEnv};
    $ENV{TERM} = 'dumb';

    if ($Is_Cygwin && ! -f 'cygwin1.dll') {
	system("/usr/bin/cp /usr/bin/cygwin1.dll .") &&
	    die "$0: failed to cp cygwin1.dll: $!\n";
	eval q{
	    END { unlink "cygwin1.dll" }
	};
    }

    if ($Is_Cygwin && ! -f 'cygcrypt-0.dll' && -f '/usr/bin/cygcrypt-0.dll') {
	system("/usr/bin/cp /usr/bin/cygcrypt-0.dll .") &&
	    die "$0: failed to cp cygcrypt-0.dll: $!\n";