1 files changed, 39 insertions, 0 deletions
diff --git a/lib/tdb2/test/run-tdb1-seqnum-wrap.c b/lib/tdb2/test/run-tdb1-seqnum-wrap.c
new file mode 100644
index 0000000000..c3eb278e1a
--- /dev/null
+++ b/lib/tdb2/test/run-tdb1-seqnum-wrap.c
@@ -0,0 +1,39 @@
+#include "tdb2-source.h"
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <err.h>
+#include "logging.h"
+
+int main(int argc, char *argv[])
+{
+	struct tdb_context *tdb;
+	unsigned int i;
+	struct tdb1_header hdr;
+	struct tdb_data key = { (unsigned char *)&hdr, sizeof(hdr) };
+	struct tdb_data data = { (unsigned char *)&hdr, sizeof(hdr) };
+	int flags[] = { TDB_DEFAULT, TDB_NOMMAP,
+			TDB_CONVERT, TDB_NOMMAP|TDB_CONVERT };
+
+	plan_tests(sizeof(flags) / sizeof(flags[0]) * 7);
+	for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+		tdb = tdb_open("run-tdb1-seqnum-wrap.tdb1",
+			       flags[i]|TDB_VERSION1|TDB_SEQNUM,
+			       O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
+		ok1(tdb);
+		if (!tdb)
+			break;
+		ok1(pread(tdb->file->fd, &hdr, sizeof(hdr), 0) == sizeof(hdr));
+		hdr.sequence_number = 0xFFFFFFFF;
+		ok1(pwrite(tdb->file->fd, &hdr, sizeof(hdr), 0) == sizeof(hdr));
+
+		/* Must not be negative: that would mean an error! */
+		ok1(tdb_get_seqnum(tdb) == 0xFFFFFFFF);
+
+		ok1(tdb_store(tdb, key, data, TDB_INSERT) == TDB_SUCCESS);
+		ok1(tdb_get_seqnum(tdb) == 0);
+		tdb_close(tdb);
+		ok1(tap_log_messages == 0);
+	}
+
+	return exit_status();
+}