1 /* $NetBSD: exf.h,v 1.3 2013/11/25 22:43:46 christos Exp $ */ 2 /*- 3 * Copyright (c) 1992, 1993, 1994 4 * The Regents of the University of California. All rights reserved. 5 * Copyright (c) 1992, 1993, 1994, 1995, 1996 6 * Keith Bostic. All rights reserved. 7 * 8 * See the LICENSE file for redistribution information. 9 * 10 * Id: exf.h,v 10.19 2002/03/02 23:36:23 skimo Exp (Berkeley) Date: 2002/03/02 23:36:23 11 */ 12 /* Undo direction. */ 13 /* 14 * exf -- 15 * The file structure. 16 */ 17 struct _exf { 18 TAILQ_ENTRY(_exf) q; /* Linked list of file structures. */ 19 int refcnt; /* Reference count. */ 20 21 TAILQ_HEAD(_escrh, _scr) scrq; /* Attached screens */ 22 /* Underlying database state. */ 23 DB_ENV *env; /* The DB environment. */ 24 char *env_path; /* DB environment directory. */ 25 DB *db; /* File db structure. */ 26 db_recno_t c_nlines; /* Cached lines in the file. */ 27 28 DB *log; /* Log db structure. */ 29 db_recno_t l_high; /* Log last + 1 record number. */ 30 db_recno_t l_cur; /* Log current record number. */ 31 #ifdef USE_DB4_LOGGING 32 DB_LSN lsn_first; 33 DB_LSN lsn_high; /* LSN of last record. */ 34 DB_LSN lsn_cur; /* LSN of first record to undo. */ 35 #endif 36 MARK l_cursor; /* Log cursor position. */ 37 dir_t lundo; /* Last undo direction. */ 38 WIN *l_win; /* Window owning transaction. */ 39 40 LIST_HEAD(_markh, _lmark) marks;/* Linked list of file MARK's. */ 41 42 /* 43 * XXX 44 * Mtime should be a struct timespec, but time_t is more portable. 45 */ 46 dev_t mdev; /* Device. */ 47 ino_t minode; /* Inode. */ 48 time_t mtime; /* Last modification time. */ 49 50 int fcntl_fd; /* Fcntl locking fd; see exf.c. */ 51 int fd; /* File descriptor */ 52 53 /* 54 * Recovery in general, and these fields specifically, are described 55 * in recover.c. 56 */ 57 #define RCV_PERIOD 120 /* Sync every two minutes. */ 58 char *rcv_path; /* Recover file name. */ 59 char *rcv_mpath; /* Recover mail file name. */ 60 int rcv_fd; /* Locked mail file descriptor. */ 61 62 void *lock; /* Lock for log. */ 63 64 #define F_DEVSET 0x001 /* mdev/minode fields initialized. */ 65 #define F_FIRSTMODIFY 0x002 /* File not yet modified. */ 66 #define F_MODIFIED 0x004 /* File is currently dirty. */ 67 #define F_MULTILOCK 0x008 /* Multiple processes running, lock. */ 68 #define F_NOLOG 0x010 /* Logging turned off. */ 69 #define F_RCV_NORM 0x020 /* Don't delete recovery files. */ 70 #define F_RCV_ON 0x040 /* Recovery is possible. */ 71 #define F_UNDO 0x080 /* No change since last undo. */ 72 u_int8_t flags; 73 }; 74 75 /* Flags to db_get(). */ 76 #define DBG_FATAL 0x001 /* If DNE, error message. */ 77 #define DBG_NOCACHE 0x002 /* Ignore the front-end cache. */ 78 79 /* Flags to file_init() and file_write(). */ 80 #define FS_ALL 0x001 /* Write the entire file. */ 81 #define FS_APPEND 0x002 /* Append to the file. */ 82 #define FS_FORCE 0x004 /* Force is set. */ 83 #define FS_OPENERR 0x008 /* Open failed, try it again. */ 84 #define FS_POSSIBLE 0x010 /* Force could have been set. */ 85 #define FS_SETALT 0x020 /* Set alternate file name. */ 86 87 /* Flags to rcv_sync(). */ 88 #define RCV_EMAIL 0x01 /* Send the user email, IFF file modified. */ 89 #define RCV_ENDSESSION 0x02 /* End the file session. */ 90 #define RCV_PRESERVE 0x04 /* Preserve backup file, IFF file modified. */ 91 #define RCV_SNAPSHOT 0x08 /* Snapshot the recovery, and send email. */ 92