mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 04:01:10 +00:00
153 lines
3.0 KiB
C
153 lines
3.0 KiB
C
/*-
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 1997, 1998
|
|
* Sleepycat Software. All rights reserved.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#ifndef lint
|
|
static const char sccsid[] = "@(#)os_open.c 10.33 (Sleepycat) 10/12/98";
|
|
#endif /* not lint */
|
|
|
|
#ifndef NO_SYSTEM_INCLUDES
|
|
#include <sys/types.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include "db_int.h"
|
|
#include "os_jump.h"
|
|
|
|
/*
|
|
* __db_open --
|
|
* Open a file descriptor.
|
|
*
|
|
* PUBLIC: int __db_open __P((const char *, u_int32_t, u_int32_t, int, int *));
|
|
*/
|
|
int
|
|
__db_open(name, arg_flags, ok_flags, mode, fdp)
|
|
const char *name;
|
|
u_int32_t arg_flags, ok_flags;
|
|
int mode, *fdp;
|
|
{
|
|
#if !defined(_WIN32) && defined(HAVE_SIGFILLSET)
|
|
sigset_t set, oset;
|
|
#endif
|
|
int flags, ret;
|
|
|
|
if (arg_flags & ~ok_flags)
|
|
return (EINVAL);
|
|
|
|
flags = 0;
|
|
|
|
/*
|
|
* DB requires the semantic that two files opened at the same time
|
|
* with O_CREAT and O_EXCL set will return failure in at least one.
|
|
*/
|
|
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;
|
|
|
|
#if defined(_WIN32) || defined(WIN16)
|
|
#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;
|
|
|
|
#if !defined(_WIN32) && defined(HAVE_SIGFILLSET)
|
|
/*
|
|
* We block every signal we can get our hands on so that the temporary
|
|
* file isn't left around if we're interrupted at the wrong time. Of
|
|
* course, if we drop core in-between the calls we'll hang forever, but
|
|
* that's probably okay. ;-)
|
|
*/
|
|
if (arg_flags & DB_TEMPORARY) {
|
|
(void)sigfillset(&set);
|
|
(void)sigprocmask(SIG_BLOCK, &set, &oset);
|
|
}
|
|
#endif
|
|
|
|
/* Open the file. */
|
|
if ((ret = __os_open(name, flags, mode, fdp)) != 0)
|
|
return (ret);
|
|
|
|
#if !defined(_WIN32)
|
|
/* Delete any temporary file; done for Win32 by _O_TEMPORARY. */
|
|
if (arg_flags & DB_TEMPORARY) {
|
|
(void)__os_unlink(name);
|
|
#if defined(HAVE_SIGFILLSET)
|
|
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
#if !defined(_WIN32) && !defined(WIN16) && !defined(VMS)
|
|
/*
|
|
* Deny access to any child process.
|
|
* VMS: does not have fd inheritance.
|
|
* Win32: done by O_NOINHERIT.
|
|
*/
|
|
if (fcntl(*fdp, F_SETFD, 1) == -1) {
|
|
ret = errno;
|
|
|
|
(void)__os_close(*fdp);
|
|
return (ret);
|
|
}
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* __os_open --
|
|
* Open a file.
|
|
*
|
|
* PUBLIC: int __os_open __P((const char *, int, int, int *));
|
|
*/
|
|
int
|
|
__os_open(name, flags, mode, fdp)
|
|
const char *name;
|
|
int flags, mode, *fdp;
|
|
{
|
|
*fdp = __db_jump.j_open != NULL ?
|
|
__db_jump.j_open(name, flags, mode) : open(name, flags, mode);
|
|
return (*fdp == -1 ? errno : 0);
|
|
}
|
|
|
|
/*
|
|
* __os_close --
|
|
* Close a file descriptor.
|
|
*
|
|
* PUBLIC: int __os_close __P((int));
|
|
*/
|
|
int
|
|
__os_close(fd)
|
|
int fd;
|
|
{
|
|
int ret;
|
|
|
|
ret = __db_jump.j_close != NULL ? __db_jump.j_close(fd) : close(fd);
|
|
return (ret == 0 ? 0 : errno);
|
|
}
|