os_rename.c

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1997-2005
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: os_rename.c,v 12.1 2005/06/16 20:23:30 bostic Exp $
 */

#include "db_config.h"

#include "db_int.h"

/*
 * __os_rename --
 *      Rename a file.
 */
int
__os_rename(dbenv, oldname, newname, flags)
        DB_ENV *dbenv;
        const char *oldname, *newname;
        u_int32_t flags;
{
        int ret;
        _TCHAR *toldname, *tnewname;

        ret = 0;
        if (DB_GLOBAL(j_rename) != NULL) {
                if (DB_GLOBAL(j_rename)(oldname, newname) == -1)
                        ret = __os_get_errno();
                goto done;
        }

        TO_TSTRING(dbenv, oldname, toldname, ret);
        if (ret != 0)
                goto done;
        TO_TSTRING(dbenv, newname, tnewname, ret);
        if (ret != 0)
                goto err;

        if (!MoveFile(toldname, tnewname))
                ret = __os_get_errno();

        if (ret == EEXIST) {
                ret = 0;
                if (__os_is_winnt()) {
                        if (!MoveFileEx(
                            toldname, tnewname, MOVEFILE_REPLACE_EXISTING))
                                ret = __os_get_errno();
                } else {
                        /*
                         * There is no MoveFileEx for Win9x/Me, so we have to
                         * do the best we can.  Note that the MoveFile call
                         * above would have succeeded if oldname and newname
                         * refer to the same file, so we don't need to check
                         * that here.
                         */
                        (void)DeleteFile(tnewname);
                        if (!MoveFile(toldname, tnewname))
                                ret = __os_get_errno();
                }
        }

        FREE_STRING(dbenv, tnewname);
err:    FREE_STRING(dbenv, toldname);

done:   if (ret != 0 && flags == 0)
                __db_err(dbenv,
                    "Rename %s %s: %s", oldname, newname, strerror(ret));

        return (ret);
}

---