+#define _XOPEN_SOURCE 500
+#include "tdb/tdb.h"
+#include "tdb/io.c"
+#include "tdb/tdb.c"
+#include "tdb/lock.c"
+#include "tdb/freelist.c"
+#include "tdb/traverse.c"
+#include "tdb/transaction.c"
+#include "tdb/error.c"
+#include "tdb/open.c"
+#include "tap/tap.h"
+#include <stdlib.h>
+#include <err.h>
+
+int main(int argc, char *argv[])
+{
+ struct tdb_context *tdb;
+ struct tdb_header hdr;
+ int fd;
+
+ plan_tests(11);
+ /* Can open fine if complete crap, as long as O_CREAT. */
+ fd = open("/tmp/test.tdb", O_RDWR|O_CREAT|O_TRUNC, 0600);
+ ok1(fd >= 0);
+ ok1(write(fd, "hello world", 11) == 11);
+ close(fd);
+ tdb = tdb_open("/tmp/test.tdb", 1024, 0, O_RDWR, 0);
+ ok1(!tdb);
+ tdb = tdb_open("/tmp/test.tdb", 1024, 0, O_CREAT|O_RDWR, 0600);
+ ok1(tdb);
+ tdb_close(tdb);
+
+ /* Now, with wrong version it should *not* overwrite. */
+ fd = open("/tmp/test.tdb", O_RDWR);
+ ok1(fd >= 0);
+ ok1(read(fd, &hdr, sizeof(hdr)) == sizeof(hdr));
+ ok1(hdr.version == TDB_VERSION);
+ hdr.version++;
+ lseek(fd, 0, SEEK_SET);
+ ok1(write(fd, &hdr, sizeof(hdr)) == sizeof(hdr));
+ close(fd);
+
+ tdb = tdb_open("/tmp/test.tdb", 1024, 0, O_RDWR|O_CREAT, 0600);
+ ok1(errno == EIO);
+ ok1(!tdb);
+
+ /* With truncate, will be fine. */
+ tdb = tdb_open("/tmp/test.tdb", 1024, 0, O_RDWR|O_CREAT|O_TRUNC, 0600);
+ ok1(tdb);
+ tdb_close(tdb);
+ unlink("/tmp/test.tdb");
+
+ return exit_status();
+}