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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)db_os_open.c 10.14 (Sleepycat) 7/5/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#endif
#include "db_int.h"
#include "os_ext.h"
/*
* __db_oflags --
* Convert open(2) flags to DB flags.
*
* PUBLIC: int __db_oflags __P((int));
*/
int
__db_oflags(oflags)
int oflags;
{
int dbflags;
/*
* XXX
* Convert POSIX 1003.1 open(2) flags to DB flags. Not an exact
* science as most POSIX implementations don't have a flag value
* for O_RDONLY, it's simply the lack of a write flag.
*/
dbflags = 0;
if (oflags & O_CREAT)
dbflags |= DB_CREATE;
if (!(oflags & (O_RDWR | O_WRONLY)) || oflags & O_RDONLY)
dbflags |= DB_RDONLY;
if (oflags & O_TRUNC)
dbflags |= DB_TRUNCATE;
return (dbflags);
}
/*
* __db_fdopen --
* Open a file descriptor.
*
* PUBLIC: int __db_fdopen __P((const char *, int, int, int, int *));
*/
int
__db_fdopen(name, arg_flags, ok_flags, mode, fdp)
const char *name;
int arg_flags, ok_flags, mode, *fdp;
{
int fd, flags;
if (arg_flags & ~ok_flags)
return (EINVAL);
flags = 0;
if (arg_flags & DB_CREATE)
flags |= O_CREAT;
if (arg_flags & DB_EXCL)
flags |= O_EXCL;
if (arg_flags & DB_RDONLY)
flags |= O_RDONLY;
else
flags |= O_RDWR;
#ifdef _WIN32
#ifdef _MSC_VER
if (arg_flags & DB_SEQUENTIAL)
flags |= _O_SEQUENTIAL;
else
flags |= _O_RANDOM;
if (arg_flags & DB_TEMPORARY)
flags |= _O_TEMPORARY;
#endif
flags |= O_BINARY | O_NOINHERIT;
#endif
if (arg_flags & DB_TRUNCATE)
flags |= O_TRUNC;
/* Open the file. */
if ((fd = open(name, flags, mode)) == -1)
return (errno);
#ifndef _WIN32
/* Delete any temporary file; done for Win32 by _O_TEMPORARY. */
if (arg_flags & DB_TEMPORARY)
(void)unlink(name);
#endif
#if !defined(_WIN32) && !defined(macintosh)
/*
* Deny access to any child process; done for Win32 by O_NOINHERIT,
* MacOS has neither child processes nor fd inheritance.
*/
if (fcntl(fd, F_SETFD, 1) == -1) {
int ret = errno;
(void)__db_close(fd);
return (ret);
}
#endif
*fdp = fd;
return (0);
}
/*
* __db_fsync --
* Flush a file descriptor.
*
* PUBLIC: int __db_fsync __P((int));
*/
int
__db_fsync(fd)
int fd;
{
return (fsync(fd) ? errno : 0);
}
/*
* __db_close --
* Close a file descriptor.
*
* PUBLIC: int __db_close __P((int));
*/
int
__db_close(fd)
int fd;
{
return (close(fd) ? errno : 0);
}
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