tests: add DejaGNU framework

DejaGNU seems to be the 'standard' GNU test framework (which by itself
doesn't say much), but it seems relatively usable and the "remote
system" capabilities might come in handy for virtualisation-based tests
for kernel interactions or something.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
diff --git a/buildtest.sh b/buildtest.sh
index c9dd323..de638f5 100755
--- a/buildtest.sh
+++ b/buildtest.sh
@@ -85,6 +85,7 @@
 	cd "$bdir"
 	../sdist/configure $args
 	make -j5
+	make check
 	make DESTDIR="$TEMP/inst_$cfg" install
 	cd ..
 done
diff --git a/configure.ac b/configure.ac
index 6e59037..582f357 100755
--- a/configure.ac
+++ b/configure.ac
@@ -1619,6 +1619,18 @@
 AC_SUBST(PICFLAGS)
 AC_SUBST(PILDFLAGS)
 
+dnl -------
+dnl DejaGNU
+dnl -------
+if test x"$DEJAGNU" = x
+then
+  DEJAGNU="\$(top_srcdir)/tests/global-conf.exp"
+fi
+RUNTESTDEFAULTFLAGS="-x --tool \$\$tool"
+
+AC_SUBST(DEJAGNU)
+AC_SUBST(RUNTESTDEFAULTFLAGS)
+
 dnl ------------------------------
 dnl set paths for state directory
 dnl ------------------------------
@@ -1691,8 +1703,8 @@
 AC_CONFIG_FILES([Makefile lib/Makefile zebra/Makefile ripd/Makefile 
 	  ripngd/Makefile bgpd/Makefile ospfd/Makefile watchquagga/Makefile
 	  ospf6d/Makefile isisd/Makefile babeld/Makefile vtysh/Makefile
-          doc/Makefile ospfclient/Makefile tests/Makefile m4/Makefile
-          redhat/Makefile
+	  doc/Makefile ospfclient/Makefile tests/Makefile m4/Makefile
+	  redhat/Makefile
 	  pkgsrc/Makefile
 	  redhat/quagga.spec 
 	  lib/version.h
diff --git a/tests/.gitignore b/tests/.gitignore
index 93e886c..8baea0a 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -10,6 +10,10 @@
 *.lo
 *.la
 *.libs
+*.bak
+*.log
+*.sum
+*.xml
 .arch-inventory
 .arch-ids
 aspathtest
@@ -27,3 +31,4 @@
 testprivs
 testsig
 teststream
+site.exp
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 7bc880b..14f7bef 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,3 +1,14 @@
+AUTOMAKE_OPTIONS    = dejagnu
+export DEJAGNU
+
+SUBDIRS =
+
+EXTRA_DIST = \
+	config/unix.exp \
+	global-conf.exp
+
+DEJATOOL =
+
 INCLUDES = @INCLUDES@ -I.. -I$(top_srcdir) -I$(top_srcdir)/lib -I$(top_builddir)/lib
 DEFS = @DEFS@ $(LOCAL_OPTS) -DSYSCONFDIR=\"$(sysconfdir)/\"
 
diff --git a/tests/config/unix.exp b/tests/config/unix.exp
new file mode 100644
index 0000000..25ea97f
--- /dev/null
+++ b/tests/config/unix.exp
@@ -0,0 +1,104 @@
+
+# every test should always be run and always return some status.
+# so, if we lose sync with a multi-test program, aborted will be used
+# to flag the remainder of the tests as untested.
+#set aborted 0
+
+# only match with color codes since "failed" / "OK" might otherwise
+# be part of the output...
+#set color 1
+
+set config_h [open "../config.h" "r"]
+set config_h_text [read $config_h]
+close $config_h
+set i [string first "#define HAVE_IPV6" $config_h_text]
+if { $i >= 0 } {
+	set have_ipv6 1
+} else {
+	set have_ipv6 0
+}
+send_user "IPv6 enabled: $have_ipv6\n"
+set xfail 0
+
+proc onetest { test_name note start } {
+	global aborted
+	global testprefix
+	global verbose
+	global color
+	global xfail
+
+	if { $aborted > 0 } {
+		untested "$testprefix$test_name"
+		return
+	}
+
+	if { $verbose > 0 } {
+		send_user "$testprefix$test_name$note\n"
+	}
+	expect {
+		"$start"	{ }
+
+		eof	{ unresolved "$testprefix$test_name"; set aborted 1; }
+		timeout	{ unresolved "$testprefix$test_name"; set aborted 1; }
+	}
+
+	if { $aborted > 0 } {
+		send_user "sync failed: $testprefix$test_name$note -- $testprefix aborted!\n"
+		return
+	}
+
+	if { $color } {
+		set pat "(32mOK|31mfailed)"
+	} else {
+		set pat "(OK|failed)"
+	}
+	expect {
+		# need this because otherwise expect will skip over a "failed" and
+		# grab the next "OK" (or the other way around)
+		-re "$pat"  {
+			if { "$expect_out(0,string)" == "32mOK" || "$expect_out(0,string)" == "OK" } {
+				pass "$testprefix$test_name"
+			} else {
+				if { $xfail } {
+					xfail "$testprefix$test_name"
+				} else {
+					fail "$testprefix$test_name"
+				}
+			}
+			return
+		}
+
+		eof	{ unresolved "$testprefix$test_name"; set aborted 1; }
+		timeout	{ unresolved "$testprefix$test_name"; set aborted 1; }
+	}
+
+	if { $aborted > 0 } {
+		send_user "failed: $testprefix$test_name$note -- $testprefix aborted!\n"
+		return
+	}
+}
+
+proc headerline { line } {
+	global aborted
+	if { $aborted > 0 } { return; }
+	expect {
+		$line	{ return; }
+		eof	{ send_user "numbering mismatch!\n"; set aborted 1; }
+		timeout	{ send_user "numbering mismatch!\n"; set aborted 1; }
+	}
+}
+
+proc simpletest { start } {
+	onetest "$start" "" "$start"
+}
+
+proc simpletest_nov6 { start } {
+	global have_ipv6
+	global xfail
+
+	set xfail [expr 1-$have_ipv6]
+	onetest "$start" "" "$start"
+	set xfail 0
+}
+
+
diff --git a/tests/global-conf.exp b/tests/global-conf.exp
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/global-conf.exp