os_unlink.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1997-2002
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: os_unlink.c,v 11.24 2002/07/12 18:56:53 bostic Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <string.h>
- #include <unistd.h>
- #endif
- #include "db_int.h"
- /*
- * __os_region_unlink --
- * Remove a shared memory object file.
- *
- * PUBLIC: int __os_region_unlink __P((DB_ENV *, const char *));
- */
- int
- __os_region_unlink(dbenv, path)
- DB_ENV *dbenv;
- const char *path;
- {
- #ifdef HAVE_QNX
- int ret;
- char *newname;
- if ((ret = __os_shmname(dbenv, path, &newname)) != 0)
- goto err;
- if ((ret = shm_unlink(newname)) != 0) {
- ret = __os_get_errno();
- if (ret != ENOENT)
- __db_err(dbenv, "shm_unlink: %s: %s",
- newname, strerror(ret));
- }
- err:
- if (newname != NULL)
- __os_free(dbenv, newname);
- return (ret);
- #else
- if (F_ISSET(dbenv, DB_ENV_OVERWRITE))
- (void)__db_overwrite(dbenv, path);
- return (__os_unlink(dbenv, path));
- #endif
- }
- /*
- * __os_unlink --
- * Remove a file.
- *
- * PUBLIC: int __os_unlink __P((DB_ENV *, const char *));
- */
- int
- __os_unlink(dbenv, path)
- DB_ENV *dbenv;
- const char *path;
- {
- int ret;
- retry: ret = DB_GLOBAL(j_unlink) != NULL ?
- DB_GLOBAL(j_unlink)(path) :
- #ifdef HAVE_VXWORKS
- unlink((char *)path);
- #else
- unlink(path);
- #endif
- if (ret == -1) {
- if ((ret = __os_get_errno()) == EINTR)
- goto retry;
- /*
- * XXX
- * We really shouldn't be looking at this value ourselves,
- * but ENOENT usually signals that a file is missing, and
- * we attempt to unlink things (such as v. 2.x environment
- * regions, in DB_ENV->remove) that we're expecting not to
- * be there. Reporting errors in these cases is annoying.
- */
- #ifdef HAVE_VXWORKS
- /*
- * XXX
- * 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.
- *
- * Code below falls through to original if-statement only
- * we didn't get a "successful" error.
- */
- if (ret != 0)
- /* FALLTHROUGH */
- #endif
- if (ret != ENOENT)
- __db_err(dbenv, "unlink: %s: %s", path, strerror(ret));
- }
- return (ret);
- }