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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997-2009 Oracle. All rights reserved.
*
* $Id$
*/
#include "db_config.h"
#include "db_int.h"
/*
* __os_unlink --
* Remove a file.
*
* PUBLIC: int __os_unlink __P((ENV *, const char *, int));
*/
int
__os_unlink(env, path, overwrite_test)
ENV *env;
const char *path;
int overwrite_test;
{
DB_ENV *dbenv;
int ret, t_ret;
dbenv = env == NULL ? NULL : env->dbenv;
if (dbenv != NULL &&
FLD_ISSET(dbenv->verbose, DB_VERB_FILEOPS | DB_VERB_FILEOPS_ALL))
__db_msg(env, "fileops: unlink %s", path);
/* Optionally overwrite the contents of the file to enhance security. */
if (dbenv != NULL && overwrite_test && F_ISSET(dbenv, DB_ENV_OVERWRITE))
(void)__db_file_multi_write(env, path);
LAST_PANIC_CHECK_BEFORE_IO(env);
if (DB_GLOBAL(j_unlink) != NULL)
ret = DB_GLOBAL(j_unlink)(path);
else {
RETRY_CHK((unlink(CHAR_STAR_CAST path)), ret);
#ifdef HAVE_QNX
/*
* The file may be a region file created by shm_open, not a
* regular file. Try and delete using unlink, and if that
* fails for an unexpected reason, try a shared memory unlink.
*/
if (ret != 0 && __os_posix_err(ret) != ENOENT)
RETRY_CHK((shm_unlink(path)), ret);
#endif
}
/*
* !!!
* The results of unlink are file system driver specific on VxWorks.
* In the case of removing a file that did not exist, some, at least,
* return an error, but with an errno of 0, not ENOENT. We do not
* have to test for that explicitly, the RETRY_CHK macro resets "ret"
* to be the errno, and so we'll just slide right on through.
*
* XXX
* We shouldn't be testing for an errno of ENOENT here, but ENOENT
* signals that a file is missing, and we attempt to unlink things
* (such as v. 2.x environment regions, in ENV->remove) that we
* are expecting not to be there. Reporting errors in these cases
* is annoying.
*/
if (ret != 0) {
t_ret = __os_posix_err(ret);
if (t_ret != ENOENT)
__db_syserr(env, ret, "unlink: %s", path);
ret = t_ret;
}
return (ret);
}
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