completed sandboxing support for fink

diff -uNr fink-0.41.0.orig/MANIFEST fink-0.41.0/MANIFEST
--- fink-0.41.0.orig/MANIFEST	2016-09-20 14:16:24.000000000 -0400
+++ fink-0.41.0/MANIFEST	2016-11-05 07:49:06.000000000 -0400
@@ -24,6 +24,7 @@
 fink.8.in
 fink.conf.5.in
 fink.csh
+fink.sb
 fink.sh
 images/finkDoneFailed.png
 images/finkDonePassed.png
diff -uNr fink-0.41.0.orig/fink.8.in fink-0.41.0/fink.8.in
--- fink-0.41.0.orig/fink.8.in	2016-09-20 14:16:24.000000000 -0400
+++ fink-0.41.0/fink.8.in	2016-11-05 07:50:59.000000000 -0400
@@ -103,6 +103,19 @@
 .It Cm --no-build-as-nobody
 Force the the unpack, patch, compile, and install phases to be 
 performed as root.
+.It Cm --build-in-sandbox
+Execute packaging within a sandbox which blacklists read access to 
+those directories listed in
+.Pa @PREFIX@/etc/fink.sb.
+This is the default unless overridden by a setting of
+.Pa UseSandbox`: false
+in
+.Pa fink.conf
+configuration file.
+.It Cm --no-build-in-sandbox
+Don't execute within a sandbox, opposite of the
+.Cm --build-in-sandbox
+flag.
 .It Cm -m, --maintainer
 Perform actions useful to package maintainers: run validation on
 the .info file before building and on the .deb after building a
diff -uNr fink-0.41.0.orig/fink.conf.5.in fink-0.41.0/fink.conf.5.in
--- fink-0.41.0.orig/fink.conf.5.in	2016-09-20 14:16:24.000000000 -0400
+++ fink-0.41.0/fink.conf.5.in	2016-11-05 07:52:31.000000000 -0400
@@ -204,6 +204,12 @@
 uses the value of this option in MAKEFLAGS=-j. Running
 .Cm fink configure
 will tell you how many active CPUs/cores are available on your system.
+.It Cm UseSandbox: Ar boolean
+Causes
+.Nm fink
+to execute within a sandbox which blacklists file read access to
+those directories listed in 
+.Pa @PREFIX@/etc/fink.sb
 .It Cm AutoUid: Ar boolean
 This option specifies whether fink should dynamically allocate the UID and GID
 of its unprivileged fink-bld user if that user is absent.
diff -uNr fink-0.41.0.orig/fink.sb fink-0.41.0/fink.sb
--- fink-0.41.0.orig/fink.sb	1969-12-31 19:00:00.000000000 -0500
+++ fink-0.41.0/fink.sb	2016-11-05 07:52:55.000000000 -0400
@@ -0,0 +1,2 @@
+/usr/local
+/opt/local
diff -uNr fink-0.41.0.orig/install.sh fink-0.41.0/install.sh
--- fink-0.41.0.orig/install.sh	2016-09-20 14:16:24.000000000 -0400
+++ fink-0.41.0/install.sh	2016-11-05 07:53:26.000000000 -0400
@@ -70,6 +70,7 @@
 
 install -c -p -m 755 postinstall.pl "$basepath/lib/fink/"
 install -c -p -m 644 shlibs.default "$basepath/etc/dpkg/"
+install -c -p -m 644 fink.sb "$basepath/etc/"
 install -c -p -m 644 fink.8 "$basepath/share/man/man8/"
 install -c -p -m 644 fink.conf.5 "$basepath/share/man/man5/"
 install -c -p -m 644 images/*.png "$basepath/share/fink/images/"
diff -uNr fink-0.41.0.orig/perlmod/Fink/Config.pm fink-0.41.0/perlmod/Fink/Config.pm
--- fink-0.41.0.orig/perlmod/Fink/Config.pm	2016-09-20 14:16:24.000000000 -0400
+++ fink-0.41.0/perlmod/Fink/Config.pm	2016-11-05 07:54:40.000000000 -0400
@@ -219,6 +219,7 @@
 	map( { $_ => 0 } qw(dontask interactive verbosity keep_build keep_root
 		maintainermode showversion use_binary) ),
 	map( { $_ => 1 } qw(build_as_nobody) ),
+	map( { $_ => 1 } qw(build_in_sandbox) ),
 	map( { $_ => "" } qw(tests validate) ),
 	map ( { $_ => [] } qw(include_trees exclude_trees) ),
 	map( { $_ => -1 } qw(use_binary) ),
@@ -272,6 +273,7 @@
 			'download pre-compiled packages from the binary distribution '
 			. 'if available'	],
 		[ 'build-as-nobody!'   => \$opts{build_as_nobody},	'see man page'	],
+		[ 'build-in-sandbox!' => \$opts{build_in_sandbox}, 'see man page'  ],
 		[ 'maintainer|m'       => sub {set_checking_opts(\%opts, @_);}, 'see man page'	],
 		[ 'tests:s'            => sub {set_checking_opts(\%opts, @_);}, 'see man page'  ],
 		[ 'validate:s'         => sub {set_checking_opts(\%opts, @_);}, 'see man page'  ],
diff -uNr fink-0.41.0.orig/perlmod/Fink/Configure.pm fink-0.41.0/perlmod/Fink/Configure.pm
--- fink-0.41.0.orig/perlmod/Fink/Configure.pm	2016-09-20 14:16:24.000000000 -0400
+++ fink-0.41.0/perlmod/Fink/Configure.pm	2016-11-05 07:58:59.000000000 -0400
@@ -73,8 +73,9 @@
 #  1: Added ConfFileCompatVersion, UseBinaryDist, fink 0.24.0
 #  2: Added MaxBuildJobs, fink 0.30.1 (belated bump)
 #  3: Added AutoUid, AutoUidMin, AutoUidMax, FinkBldUid, fink 0.33.0
+#  4. Added UseSandbox, fink 0.42.0
 #
-our $conf_file_compat_version  = 3;
+our $conf_file_compat_version  = 4;
 
 =head2 Exported Variables
 
@@ -137,7 +138,7 @@
 
 sub choose_misc {
 	my $verbose;
-	my ($proxy_prompt, $proxy, $passive_ftp, $same_for_ftp, $binary_dist);
+	my ($proxy_prompt, $proxy, $passive_ftp, $same_for_ftp, $binary_dist, $sandbox_build);
 	my ($auto_uid, $uid_min, $uid_max, $fink_conf_uid, $real_uid, $real_gid,
 		$do_uid);
 
@@ -189,6 +190,25 @@
 	$config->set_param("UseBinaryDist", $binary_dist ? "true" : "false");
 
 	print "\n";
+	$sandbox_build = $config->param_boolean("UseSandbox");
+
+	# New users should use the sandbox build, but an existing user who
+	# is running "fink configure" should see a default answer of "no"
+	# for this question... To tell these two classes of users apart,
+	# we check to see if the "Verbose" parameter has been set yet.
+	
+	if (!$config->has_param("UseSandbox")) {
+		if ($config->has_param("Verbose")) {
+			$sandbox_build = 0;
+		} else {
+			$sandbox_build = 1;
+		}
+	}
+	$sandbox_build =
+		&prompt_boolean("Should Fink try to build packages under ".
+			"the Apple sandbox mechanism?",
+			default => $sandbox_build);
+		$config->set_param("UseSandbox", $sandbox_build ? "true" : "false");
 
 	my $v_distribution = version->parse('v'.$config->param("Distribution"));
 	if ($v_distribution >= version->parse("v10.7")) {
diff -uNr fink-0.41.0.orig/perlmod/Fink/Services.pm fink-0.41.0/perlmod/Fink/Services.pm
--- fink-0.41.0.orig/perlmod/Fink/Services.pm	2016-09-20 14:16:24.000000000 -0400
+++ fink-0.41.0/perlmod/Fink/Services.pm	2016-11-05 08:03:10.000000000 -0400
@@ -594,6 +594,33 @@
 		@wrap = map "$_=$ENV{$_}", sort keys %ENV;
 		push @wrap, "__CFPREFERENCES_AVOID_DAEMON=1";
 		unshift @wrap, 'env' if @wrap;
+		my $runtime_request = Fink::Config::get_option("build_in_sandbox");
+		my $sandbox_request;
+		if ($runtime_request == 0) { # -no-build-in-sandbox
+			$sandbox_request = 0;
+		} elsif ($runtime_request == 1) {
+			$sandbox_request = 1;
+		} elsif ($Fink::Config::config->param_boolean('UseSandbox')) {
+			$sandbox_request = 1;
+		} else {
+			$sandbox_request = 0;
+		}
+		if ( $sandbox_request ) {
+			my $sandbox = "$Fink::Config::basepath/etc/fink.sb";
+			if (open my $info, $sandbox) {
+				my $sandbox_profile = "(version 1) \n";
+				$sandbox_profile .= "(allow default) \n";
+				$sandbox_profile .= "(deny file* \n";
+				while( my $line = <$info>)  {
+					chomp $line;
+					$sandbox_profile .= "\t(subpath \"".$line."\"\)\n";
+				}
+				$sandbox_profile .= "\)\n";
+				close $info;
+				print STDERR $sandbox_profile, "\n" if ($options{debug});
+				@wrap = (qw| sandbox-exec -p |, $sandbox_profile, @wrap) if -f $sandbox;
+			}
+		}
 		my $sudo_cmd = "sudo -u " . Fink::Config::build_as_user_group()->{'user'};
 		@wrap = (split(' ', $sudo_cmd), @wrap, qw/ sh -c /);
 		$wrap_token = "$sudo_cmd [ENV] sh -c ";
diff -uNr fink-0.41.0.orig/t/Services/execute_nonroot_okay.t fink-0.41.0/t/Services/execute_nonroot_okay.t
--- fink-0.41.0.orig/t/Services/execute_nonroot_okay.t	2016-09-20 14:16:24.000000000 -0400
+++ fink-0.41.0/t/Services/execute_nonroot_okay.t	2016-11-05 08:04:11.000000000 -0400
@@ -15,6 +15,8 @@
 can_ok('Fink::Config','get_option');   # 4
 can_ok('Fink::Config','set_options');  # 5
 
+my $config_obj = Fink::Config->new_with_path('basepath/etc/fink.conf');
+
 # need a a safe place to create files
 
 # OS X 10.2 comes with perl 5.6.0, but File::Temp isn't in core until 5.6.1