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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1998, 1999
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char sccsid[] = "@(#)os_handle.c 11.2 (Sleepycat) 11/12/99";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#ifndef _MSC_VER /* _WIN32 */
#include <unistd.h>
#endif
#endif
#include "db_int.h"
#include "os_jump.h"
/*
* CDB___os_openhandle --
* Open a file, using POSIX 1003.1 open flags.
*
* PUBLIC: int CDB___os_openhandle __P((const char *, int, int, DB_FH *));
*/
int
CDB___os_openhandle(name, flags, mode, fhp)
const char *name;
int flags, mode;
DB_FH *fhp;
{
int ret, try;
memset(fhp, 0, sizeof(*fhp));
for (ret = 0, try = 1; try < 4; ++try) {
/*
* !!!
* Open with full sharing on VMS.
*
* We use these flags because they are the ones set by the VMS
* CRTL mmap() call when it opens a file, and we have to be
* able to open files that mmap() has previously opened, e.g.,
* when we're joining already existing DB regions.
*/
#ifdef _MSC_VER /* _WIN32 */
/* THIS IS A HACK TO REINSTATE BINARY MODE! FIX ME.. FIND THE PROBLEM*/
mode |= _O_BINARY;
#endif
fhp->fd = CDB___db_jump.j_open != NULL ?
CDB___db_jump.j_open(name, flags, mode) :
#ifdef __VMS
open(name, flags, mode, "shr=get,put,upd,del,upi");
#else
open(name, flags, mode);
#endif
/* DEBUGGING */
/* printf("\n[CDB___os_openhandle] name=[%s] mode=[%#x] fhp->fd=[%d]\n", name, mode, fhp->fd); */
if (fhp->fd == -1) {
/*
* If it's a "temporary" error, we retry up to 3 times,
* waiting up to 12 seconds. While it's not a problem
* if we can't open a database, an inability to open a
* log file is cause for serious dismay.
*/
ret = CDB___os_get_errno();
if (ret == ENFILE || ret == EMFILE || ret == ENOSPC) {
(void)CDB___os_sleep(try * 2, 0);
continue;
}
} else
F_SET(fhp, DB_FH_VALID);
break;
}
return (ret);
}
/*
* CDB___os_closehandle --
* Close a file.
*
* PUBLIC: int CDB___os_closehandle __P((DB_FH *));
*/
int
CDB___os_closehandle(fhp)
DB_FH *fhp;
{
int ret;
/* Don't close file descriptors that were never opened. */
DB_ASSERT(F_ISSET(fhp, DB_FH_VALID) && fhp->fd != -1);
ret = CDB___db_jump.j_close != NULL ?
CDB___db_jump.j_close(fhp->fd) : close(fhp->fd);
/*
* Smash the POSIX file descriptor -- it's never tested, but we want
* to catch any mistakes.
*/
fhp->fd = -1;
F_CLR(fhp, DB_FH_VALID);
return (ret == 0 ? 0 : CDB___os_get_errno());
}
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