79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997,2008 Oracle. All rights reserved.
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*
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* $Id: os_unlink.c 63573 2008-05-23 21:43:21Z trent.nelson $
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*/
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#include "db_config.h"
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#include "db_int.h"
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/*
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* __os_unlink --
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* Remove a file.
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*
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* PUBLIC: int __os_unlink __P((ENV *, const char *, int));
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*/
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int
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__os_unlink(env, path, overwrite_test)
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ENV *env;
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const char *path;
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int overwrite_test;
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{
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DB_ENV *dbenv;
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int ret, t_ret;
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dbenv = env == NULL ? NULL : env->dbenv;
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if (dbenv != NULL &&
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FLD_ISSET(dbenv->verbose, DB_VERB_FILEOPS | DB_VERB_FILEOPS_ALL))
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__db_msg(env, "fileops: unlink %s", path);
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/* Optionally overwrite the contents of the file to enhance security. */
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if (dbenv != NULL && overwrite_test && F_ISSET(dbenv, DB_ENV_OVERWRITE))
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(void)__db_file_multi_write(env, path);
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LAST_PANIC_CHECK_BEFORE_IO(env);
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if (DB_GLOBAL(j_unlink) != NULL)
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ret = DB_GLOBAL(j_unlink)(path);
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else {
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RETRY_CHK((unlink(CHAR_STAR_CAST path)), ret);
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#ifdef HAVE_QNX
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/*
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* The file may be a region file created by shm_open, not a
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* regular file. Try and delete using unlink, and if that
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* fails for an unexpected reason, try a shared memory unlink.
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*/
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if (ret != 0 && __os_posix_err(ret) != ENOENT)
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RETRY_CHK((shm_unlink(path)), ret);
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#endif
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}
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/*
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* !!!
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* The results of unlink are file system driver specific on VxWorks.
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* In the case of removing a file that did not exist, some, at least,
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* return an error, but with an errno of 0, not ENOENT. We do not
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* have to test for that explicitly, the RETRY_CHK macro resets "ret"
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* to be the errno, and so we'll just slide right on through.
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*
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* XXX
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* We shouldn't be testing for an errno of ENOENT here, but ENOENT
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* signals that a file is missing, and we attempt to unlink things
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* (such as v. 2.x environment regions, in ENV->remove) that we
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* are expecting not to be there. Reporting errors in these cases
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* is annoying.
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*/
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if (ret != 0) {
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t_ret = __os_posix_err(ret);
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if (t_ret != ENOENT)
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__db_syserr(env, ret, "unlink: %s", path);
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ret = t_ret;
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}
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return (ret);
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}
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