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