sefltest: Add new regression test dfs with widelinks = yes

Adds a new test trying to cd into dfs path on share with
widelinks enabled, should generate an error (see BUG:)

Add a knownfail so CI continues

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15435

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Jeremy Allison <jra@samba.org>

selftest/knownfail.d/smbclient-bug15435

@@ -0,0 +1 @@
+^samba3.blackbox.smbclient-bug15435.smbclient

source3/script/tests/test_bug15435_widelink_dfs.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+# regression test for dfs access with wide links enabled on dfs share
+
+if [ $# -lt 5 ]; then
+	cat <<EOF
+Usage: test_smbclient_basic.sh SERVER SERVER_IP DOMAIN USERNAME PASSWORD SMBCLIENT <smbclient arguments>
+EOF
+	exit 1
+fi
+
+SERVER="$1"
+SERVER_IP="$2"
+USERNAME="$3"
+PASSWORD="$4"
+smbclient="$5"
+CONFIGURATION="$6"
+shift 6
+ADDARGS="$@"
+
+incdir=$(dirname $0)/../../../testprogs/blackbox
+. $incdir/subunit.sh
+. $incdir/common_test_fns.inc
+
+# TEST
+test_smbclient "smbclient as $DOMAIN\\$USERNAME" 'ls' "//$SERVER/msdfs-share-wl" -U$DOMAIN\\$USERNAME%$PASSWORD $ADDARGS -c 'cd msdfs-src1' || failed=$(expr $failed + 1)
+
+exit $failed

source3/selftest/tests.py

@@ -1701,6 +1701,17 @@ plantestsuite("samba3.blackbox.smbclient-mget",
                "$PASSWORD",
                "valid_users"])
 
+plantestsuite("samba3.blackbox.smbclient-bug15435",
+              "fileserver",
+              [os.path.join(samba3srcdir, "script/tests/test_bug15435_widelink_dfs.sh"),
+               "$SERVER",
+               "$SERVER_IP",
+               "$USERNAME",
+               "$PASSWORD",
+               smbclient3,
+               configuration])
+
+
 if have_cluster_support:
     t = "readdir-timestamp"
     plantestsuite(