trackrdrd: Added option -f to read from a Varnish binary log dump

(from varnishlog -w), and a 'make check' target to run a
regression test.

src/Makefile.am

@@ -17,3 +17,6 @@ trackrdrd_LDADD = \
 	$(VARNISHSRC)/lib/libvarnishapi/libvarnishapi.la \
 	$(VARNISHSRC)/lib/libvarnish/libvarnish.la \
 	${PTHREAD_LIBS}
+
+check:
+	test/regress.sh

src/test/regress.sh

+#!/bin/bash
+
+# The regression test reads from a binary dump of the Varnish SHM log
+# obtained from:
+#
+# $ varnishlog -w varnish.binlog
+#
+# Load was created from JMeter running 50 request in 100 threads.
+#
+# The regression runs trackrdrd, reading from the binary dump and
+# logging to stdout in debug mode, and obtains a cksum from
+# stdout. The cksum must match an expected value.
+
+CKSUM=$(./trackrdrd -f test/varnish.binlog -l - -d | cksum)
+if [ "$CKSUM" != '915150825 166426' ]; then
+    echo "ERROR: Regression test incorrect cksum: $CKSUM"
+    exit 1
+fi
+
+echo "*** Regression test ok ***"
+exit 0

src/trackrdrd.c

@@ -197,7 +197,7 @@ main(int argc, char * const *argv)
 	vd = VSM_New();
 	VSL_Setup(vd);
 
-	while ((c = getopt(argc, argv, "DP:Vn:hl:d")) != -1) {
+	while ((c = getopt(argc, argv, "DP:Vn:hl:df:")) != -1) {
 		switch (c) {
 		case 'D':
                     D_flag = 1;
@@ -217,6 +217,10 @@ main(int argc, char * const *argv)
                 case 'd':
                     d_flag = 1;
                     break;
+                case 'f':
+                    if (VSL_Arg(vd, 'r', optarg) <= 0)
+                        exit(1);
+                    break;
                 case 'h':
 		default:
                     usage();