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/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)exf.h 8.35 (Berkeley) 8/4/94
*/
/* Undo direction. */
/*
* exf --
* The file structure.
*/
struct _exf {
int refcnt; /* Reference count. */
/* Underlying database state. */
DB *db; /* File db structure. */
char *c_lp; /* Cached line. */
size_t c_len; /* Cached line 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. */
enum direction lundo; /* Last undo direction. */
LIST_HEAD(_markh, _lmark) marks;/* Linked list of file MARK's. */
time_t mtime; /* Last modification time. */
int fcntl_fd; /* Fcntl locking fd; see exf.c. */
/*
* 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. */
struct timeval rcv_tod; /* ITIMER_REAL: recovery time-of-day. */
#define F_FIRSTMODIFY 0x001 /* File not yet modified. */
#define F_MODIFIED 0x002 /* File is currently dirty. */
#define F_MULTILOCK 0x004 /* Multiple processes running, lock. */
#define F_NOLOG 0x008 /* Logging turned off. */
#define F_RCV_NORM 0x010 /* Don't delete recovery files. */
#define F_RCV_ON 0x020 /* Recovery is possible. */
#define F_UNDO 0x040 /* No change since last undo. */
u_int8_t flags;
};
#define GETLINE_ERR(sp, lno) { \
msgq(sp, M_ERR, \
"Error: %s/%d: unable to retrieve line %u", \
tail(__FILE__), __LINE__, lno); \
}
/* EXF routines. */
FREF *file_add __P((SCR *, CHAR_T *));
int file_end __P((SCR *, EXF *, int));
int file_init __P((SCR *, FREF *, char *, int));
int file_m1 __P((SCR *, EXF *, int, int));
int file_m2 __P((SCR *, EXF *, int));
int file_m3 __P((SCR *, EXF *, int));
enum lockt { LOCK_FAILED, LOCK_SUCCESS, LOCK_UNAVAIL };
enum lockt
file_lock __P((char *, int *, int, int));
#define FS_ALL 0x01 /* Write the entire file. */
#define FS_APPEND 0x02 /* Append to the file. */
#define FS_FORCE 0x04 /* Force is set. */
#define FS_POSSIBLE 0x08 /* Force could be set. */
int file_write __P((SCR *, EXF *, MARK *, MARK *, char *, int));
/* Recovery routines. */
int rcv_init __P((SCR *, EXF *));
int rcv_list __P((SCR *));
int rcv_on __P((SCR *, EXF *));
int rcv_read __P((SCR *, FREF *));
#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. */
int rcv_sync __P((SCR *, EXF *, u_int));
int rcv_tmp __P((SCR *, EXF *, char *));
/* DB interface routines */
int file_aline __P((SCR *, EXF *, int, recno_t, char *, size_t));
int file_dline __P((SCR *, EXF *, recno_t));
char *file_gline __P((SCR *, EXF *, recno_t, size_t *));
int file_iline __P((SCR *, EXF *, recno_t, char *, size_t));
int file_lline __P((SCR *, EXF *, recno_t *));
char *file_rline __P((SCR *, EXF *, recno_t, size_t *));
int file_sline __P((SCR *, EXF *, recno_t, char *, size_t));
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