/* $NetBSD: exf.h,v 1.3 2013/11/25 22:43:46 christos Exp $ */ /*- * 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 10.19 2002/03/02 23:36:23 skimo Exp (Berkeley) Date: 2002/03/02 23:36:23 */ /* Undo direction. */ /* * exf -- * The file structure. */ struct _exf { TAILQ_ENTRY(_exf) q; /* Linked list of file structures. */ int refcnt; /* Reference count. */ TAILQ_HEAD(_escrh, _scr) scrq; /* Attached screens */ /* Underlying database state. */ DB_ENV *env; /* The DB environment. */ char *env_path; /* DB environment directory. */ DB *db; /* File db structure. */ db_recno_t c_nlines; /* Cached lines in the file. */ DB *log; /* Log db structure. */ db_recno_t l_high; /* Log last + 1 record number. */ db_recno_t l_cur; /* Log current record number. */ #ifdef USE_DB4_LOGGING DB_LSN lsn_first; DB_LSN lsn_high; /* LSN of last record. */ DB_LSN lsn_cur; /* LSN of first record to undo. */ #endif MARK l_cursor; /* Log cursor position. */ dir_t lundo; /* Last undo direction. */ WIN *l_win; /* Window owning transaction. */ LIST_HEAD(_markh, _lmark) marks;/* Linked list of file MARK's. */ /* * XXX * Mtime should be a struct timespec, but time_t is more portable. */ dev_t mdev; /* Device. */ ino_t minode; /* Inode. */ time_t mtime; /* Last modification time. */ int fcntl_fd; /* Fcntl locking fd; see exf.c. */ int fd; /* File descriptor */ /* * 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. */ void *lock; /* Lock for log. */ #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. */ |