129 lines
5.1 KiB
C
129 lines
5.1 KiB
C
/*-
|
|
* 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));
|