tdb2: add tdb_attribute_seed for setting hash seed.

[ccan] / ccan / tdb2 / test / run-seed.c

diff --git a/ccan/tdb2/test/run-seed.c b/ccan/tdb2/test/run-seed.c
new file mode 100644 (file)
index 0000000..d78e863
--- /dev/null
+++ b/ccan/tdb2/test/run-seed.c
@@ -0,0 +1,65 @@
+#include <ccan/tdb2/tdb.c>
+#include <ccan/tdb2/free.c>
+#include <ccan/tdb2/lock.c>
+#include <ccan/tdb2/io.c>
+#include <ccan/tdb2/hash.c>
+#include <ccan/tdb2/check.c>
+#include <ccan/tap/tap.h>
+#include "logging.h"
+
+static int log_count = 0;
+
+/* Normally we get a log when setting random seed. */
+static void my_log_fn(struct tdb_context *tdb,
+                     enum tdb_debug_level level, void *priv,
+                     const char *fmt, ...)
+{
+       log_count++;
+}
+
+static union tdb_attribute log_attr = {
+       .log = { .base = { .attr = TDB_ATTRIBUTE_LOG },
+                .log_fn = my_log_fn }
+};
+
+int main(int argc, char *argv[])
+{
+       unsigned int i;
+       struct tdb_context *tdb;
+       union tdb_attribute attr;
+       int flags[] = { TDB_INTERNAL, TDB_DEFAULT, TDB_NOMMAP,
+                       TDB_INTERNAL|TDB_CONVERT, TDB_CONVERT, 
+                       TDB_NOMMAP|TDB_CONVERT };
+
+       attr.seed.base.attr = TDB_ATTRIBUTE_SEED;
+       attr.seed.base.next = &log_attr;
+       attr.seed.seed = 42;
+
+       plan_tests(sizeof(flags) / sizeof(flags[0]) * 4 + 4 * 3);
+       for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
+               struct tdb_header hdr;
+               int fd;
+               tdb = tdb_open("run-seed.tdb", flags[i],
+                              O_RDWR|O_CREAT|O_TRUNC, 0600, &attr);
+               ok1(tdb);
+               if (!tdb)
+                       continue;
+               ok1(tdb_check(tdb, NULL, NULL) == 0);
+               ok1(tdb->hash_seed == 42);
+               ok1(log_count == 0);
+               tdb_close(tdb);
+
+               if (flags[i] & TDB_INTERNAL)
+                       continue;
+
+               fd = open("run-seed.tdb", O_RDONLY);
+               ok1(fd >= 0);
+               ok1(read(fd, &hdr, sizeof(hdr)) == sizeof(hdr));
+               if (flags[i] & TDB_CONVERT)
+                       ok1(bswap_64(hdr.hash_seed) == 42);
+               else
+                       ok1(hdr.hash_seed == 42);
+               close(fd);
+       }
+       return exit_status();
+}