OpenSSL::Test: when moving directory, affect env as well

The environment variables TOP, SRCTOP, BLDTOP, ...  are used to affect
the testing framework.  However, subprocesses may want to use them as
well, and therefore need their values corrected when we move to a
different directory.
Reviewed-by: NEmilia Käsper <emilia@openssl.org>

test/testlib/OpenSSL/Test.pm

@@ -60,6 +60,11 @@ my $test_name = undef;
 # (mandatory), BIN_D, TEST_D, UTIL_D and RESULT_D.
 my %directories = ();
 
+# The environment variables that gave us the contents in %directories.  These
+# get modified whenever we change directories, so that subprocesses can use
+# the values of those environment variables as well
+my @direnv = ();
+
 # A bool saying if we shall stop all testing if the current recipe has failing
 # tests or not.  This is set by setup() if the environment variable STOPTEST
 # is defined with a non-empty value.
@@ -674,6 +679,13 @@ sub __env {
     $directories{SRCTEST} =                 __srctop_dir("test");
     $directories{RESULTS} = $ENV{RESULT_D} || $directories{BLDTEST};
 
+    push @direnv, "TOP"       if $ENV{TOP};
+    push @direnv, "SRCTOP"    if $ENV{SRCTOP};
+    push @direnv, "BLDTOP"    if $ENV{BLDTOP};
+    push @direnv, "BIN_D"     if $ENV{BIN_D};
+    push @direnv, "TEST_D"    if $ENV{TEST_D};
+    push @direnv, "RESULT_D"  if $ENV{RESULT_D};
+
     $end_with_bailout	  = $ENV{STOPTEST} ? 1 : 0;
 };
 
@@ -801,6 +813,16 @@ sub __cwd {
 	}
     }
 
+    # Treat each environment variable that was used to get us the values in
+    # %directories the same was as the paths in %directories, so any sub
+    # process can use their values properly as well
+    foreach (@direnv) {
+	if (!file_name_is_absolute($ENV{$_})) {
+	    my $newpath = abs2rel(rel2abs($ENV{$_}), rel2abs($dir));
+	    $ENV{$_} = $newpath;
+	}
+    }
+
     if ($debug) {
 	print STDERR "DEBUG: __cwd(), directories and files:\n";
 	print STDERR "  \$directories{BLDTEST} = \"$directories{BLDTEST}\"\n";