ccanize tdb further, and add simple test.

ccan/tdb/io.c

@@ -189,7 +189,7 @@ int tdb_munmap(struct tdb_context *tdb)
 	if (tdb->flags & TDB_INTERNAL)
 		return 0;
 
-#ifdef HAVE_MMAP
+#if HAVE_MMAP
 	if (tdb->map_ptr) {
 		int ret = munmap(tdb->map_ptr, tdb->map_size);
 		if (ret != 0)
@@ -205,11 +205,11 @@ void tdb_mmap(struct tdb_context *tdb)
 	if (tdb->flags & TDB_INTERNAL)
 		return;
 
-#ifdef HAVE_MMAP
+#if HAVE_MMAP
 	if (!(tdb->flags & TDB_NOMMAP)) {
 		tdb->map_ptr = mmap(NULL, tdb->map_size, 
 				    PROT_READ|(tdb->read_only? 0:PROT_WRITE), 
-				    MAP_SHARED|MAP_FILE, tdb->fd, 0);
+				    MAP_SHARED, tdb->fd, 0);
 
 		/*
 		 * NB. When mmap fails it returns MAP_FAILED *NOT* NULL !!!!

ccan/tdb/open.c

@@ -159,6 +159,7 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
 		errno = ENOMEM;
 		goto fail;
 	}
+
 	tdb_io_init(tdb);
 	tdb->fd = -1;
 	tdb->name = NULL;

ccan/tdb/tdb.h

@@ -33,6 +33,8 @@ extern "C" {
 #ifndef _SAMBA_BUILD_
 /* For mode_t */
 #include <sys/types.h>
+/* For O_* flags. */
+#include <sys/stat.h>
 /* For sig_atomic_t. */
 #include <signal.h>
 #endif

ccan/tdb/tdb_private.h

+#ifndef TDB_PRIVATE_H
+#define TDB_PRIVATE_H
  /* 
    Unix SMB/CIFS implementation.
 
@@ -42,10 +44,12 @@
 #include <string.h>
 #include <errno.h>
 #include <stdio.h>
+#include <utime.h>
+#include "config.h"
 #endif
 #include "tdb.h"
 
-#ifndef HAVE_GETPAGESIZE
+#if HAVE_GETPAGESIZE
 #define getpagesize() 0x2000
 #endif
 
@@ -225,3 +229,4 @@ int tdb_rec_free_read(struct tdb_context *tdb, tdb_off_t off,
 		      struct list_struct *rec);
 
 
+#endif

ccan/tdb/test/run.c

+#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;
+	TDB_DATA key, data;
+
+	plan_tests(10);
+	tdb = tdb_open("/tmp/test.tdb", 1024, TDB_CLEAR_IF_FIRST,
+		       O_CREAT|O_TRUNC|O_RDWR, 0600);
+
+	ok1(tdb);
+	key.dsize = strlen("hi");
+	key.dptr = (void *)"hi";
+	data.dsize = strlen("world");
+	data.dptr = (void *)"world";
+
+	ok1(tdb_store(tdb, key, data, TDB_MODIFY) < 0);
+	ok1(tdb_error(tdb) == TDB_ERR_NOEXIST);
+	ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
+	ok1(tdb_store(tdb, key, data, TDB_INSERT) < 0);
+	ok1(tdb_error(tdb) == TDB_ERR_EXISTS);
+	ok1(tdb_store(tdb, key, data, TDB_MODIFY) == 0);
+
+	data = tdb_fetch(tdb, key);
+	ok1(data.dsize == strlen("world"));
+	ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
+	free(data.dptr);
+
+	key.dsize++;
+	data = tdb_fetch(tdb, key);
+	ok1(data.dptr == NULL);
+	tdb_close(tdb);
+
+	return exit_status();
+}

ccan/tdb/transaction.c

@@ -989,7 +989,7 @@ int tdb_transaction_commit(struct tdb_context *tdb)
 	   not be backed up (as tdb rounding to block sizes means that
 	   file size changes are quite rare too). The following forces
 	   mtime changes when a transaction completes */
-#ifdef HAVE_UTIME
+#if HAVE_UTIME
 	utime(tdb->name, NULL);
 #endif
 

config.h

@@ -8,3 +8,6 @@
 #define HAVE_BUILTIN_CHOOSE_EXPR 1
 #define HAVE_LITTLE_ENDIAN 1
 #define HAVE_BIG_ENDIAN 0
+#define HAVE_MMAP 1
+#define HAVE_GETPAGESIZE 1
+#define HAVE_UTIME 1