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/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*
* $Id: exf.h,v 10.10 2012/07/06 16:03:37 zy Exp $
*/
/* Undo direction. */
/*
* exf --
* The file structure.
*/
struct _exf {
int refcnt; /* Reference count. */
/* Underlying database state. */
DB *db; /* File db structure. */
CHAR_T *c_lp; /* Cached line. */
size_t c_len; /* Cached line length. */
size_t c_blen; /* Cached line buffer length. */
recno_t c_lno; /* Cached line number. */
recno_t c_nlines; /* Cached lines in the file. */
DB *log; /* Log db structure. */
char *l_lp; /* Log buffer. */
size_t l_len; /* Log buffer length. */
recno_t l_high; /* Log last + 1 record number. */
recno_t l_cur; /* Log current record number. */
MARK l_cursor; /* Log cursor position. */
dir_t lundo; /* Last undo direction. */
/* Linked list of file MARK's. */
SLIST_HEAD(_markh, _lmark) marks[1];
dev_t mdev; /* Device. */
ino_t minode; /* Inode. */
struct timespec mtim; /* Last modification time. */
/*
* Recovery in general, and these fields specifically, are described
* in recover.c.
*/
#define RCV_PERIOD 120 /* Sync every two minutes. */
char *rcv_path; /* Recover file name. */
char *rcv_mpath; /* Recover mail file name. */
int rcv_fd; /* Locked mail file descriptor. */
#define F_DEVSET 0x001 /* mdev/minode fields initialized. */
#define F_FIRSTMODIFY 0x002 /* File not yet modified. */
#define F_MODIFIED 0x004 /* File is currently dirty. */
#define F_MULTILOCK 0x008 /* Multiple processes running, lock. */
#define F_NOLOG 0x010 /* Logging turned off. */
#define F_RCV_NORM 0x020 /* Don't delete recovery files. */
#define F_RCV_ON 0x040 /* Recovery is possible. */
#define F_UNDO 0x080 /* No change since last undo. */
u_int8_t flags;
};
/* Flags to db_get(). */
#define DBG_FATAL 0x001 /* If DNE, error message. */
#define DBG_NOCACHE 0x002 /* Ignore the front-end cache. */
/* Flags to file_init() and file_write(). */
#define FS_ALL 0x001 /* Write the entire file. */
#define FS_APPEND 0x002 /* Append to the file. */
#define FS_FORCE 0x004 /* Force is set. */
#define FS_OPENERR 0x008 /* Open failed, try it again. */
#define FS_POSSIBLE 0x010 /* Force could have been set. */
#define FS_SETALT 0x020 /* Set alternate file name. */
/* Flags to rcv_sync(). */
#define RCV_EMAIL 0x01 /* Send the user email, IFF file modified. */
#define RCV_ENDSESSION 0x02 /* End the file session. */
#define RCV_PRESERVE 0x04 /* Preserve backup file, IFF file modified. */
#define RCV_SNAPSHOT 0x08 /* Snapshot the recovery, and send email. */
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