Give vtc_record() the ability to collect the bits in a VSB

bin/varnishtest/vtc.h

@@ -134,7 +134,7 @@ struct vsb *vtc_hex_to_bin(struct vtclog *vl, const char *arg);
 void vtc_expect(struct vtclog *, const char *, const char *, const char *,
     const char *, const char *);
 void vtc_wait4(struct vtclog *, long, int, int, int);
-void *vtc_record(struct vtclog *, int);
+void *vtc_record(struct vtclog *, int, struct vsb *);
 
 /* vtc_term.c */
 struct term *Term_New(struct vtclog *, int, int);

bin/varnishtest/vtc_haproxy.c

@@ -243,7 +243,7 @@ haproxy_thread(void *priv)
 	struct haproxy *h;
 
 	CAST_OBJ_NOTNULL(h, priv, HAPROXY_MAGIC);
-	return (vtc_record(h->vl, h->fds[0]));
+	return (vtc_record(h->vl, h->fds[0], NULL));
 }
 
 /**********************************************************************

bin/varnishtest/vtc_subr.c

@@ -187,7 +187,7 @@ vtc_wait4(struct vtclog *vl, long pid,
 }
 
 void *
-vtc_record(struct vtclog *vl, int fd)
+vtc_record(struct vtclog *vl, int fd, struct vsb *vsb)
 {
 	char buf[65536];
 	struct pollfd fds[1];
@@ -204,6 +204,8 @@ vtc_record(struct vtclog *vl, int fd)
 		if (fds->revents & POLLIN) {
 			i = read(fd, buf, sizeof buf - 1);
 			if (i > 0) {
+				if (vsb != NULL)
+					VSB_bcat(vsb, buf, i);
 				buf[i] = '\0';
 				vtc_dump(vl, 3, "debug", buf, -2);
 			}

bin/varnishtest/vtc_varnish.c

@@ -376,7 +376,7 @@ varnish_thread(void *priv)
 	struct varnish *v;
 
 	CAST_OBJ_NOTNULL(v, priv, VARNISH_MAGIC);
-	return (vtc_record(v->vl, v->fds[0]));
+	return (vtc_record(v->vl, v->fds[0], NULL));
 }
 
 /**********************************************************************