1 /*- 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1992, 1993, 1994, 1995, 1996 5 * Keith Bostic. All rights reserved. 6 * 7 * See the LICENSE file for redistribution information. 8 * 9 * $Id: exf.h,v 10.10 2012/07/06 16:03:37 zy Exp $ 10 */ 11 /* Undo direction. */ 12 /* 13 * exf -- 14 * The file structure. 15 */ 16 struct _exf { 17 int refcnt; /* Reference count. */ 18 19 /* Underlying database state. */ 20 DB *db; /* File db structure. */ 21 CHAR_T *c_lp; /* Cached line. */ 22 size_t c_len; /* Cached line length. */ 23 size_t c_blen; /* Cached line buffer length. */ 24 recno_t c_lno; /* Cached line number. */ 25 recno_t c_nlines; /* Cached lines in the file. */ 26 27 DB *log; /* Log db structure. */ 28 char *l_lp; /* Log buffer. */ 29 size_t l_len; /* Log buffer length. */ 30 recno_t l_high; /* Log last + 1 record number. */ 31 recno_t l_cur; /* Log current record number. */ 32 MARK l_cursor; /* Log cursor position. */ 33 dir_t lundo; /* Last undo direction. */ 34 35 /* Linked list of file MARK's. */ 36 SLIST_HEAD(_markh, _lmark) marks[1]; 37 38 dev_t mdev; /* Device. */ 39 ino_t minode; /* Inode. */ 40 struct timespec mtim; /* Last modification time. */ 41 42 /* 43 * Recovery in general, and these fields specifically, are described 44 * in recover.c. 45 */ 46 #define RCV_PERIOD 120 /* Sync every two minutes. */ 47 char *rcv_path; /* Recover file name. */ 48 char *rcv_mpath; /* Recover mail file name. */ 49 int rcv_fd; /* Locked mail file descriptor. */ 50 51 #define F_DEVSET 0x001 /* mdev/minode fields initialized. */ 52 #define F_FIRSTMODIFY 0x002 /* File not yet modified. */ 53 #define F_MODIFIED 0x004 /* File is currently dirty. */ 54 #define F_MULTILOCK 0x008 /* Multiple processes running, lock. */ 55 #define F_NOLOG 0x010 /* Logging turned off. */ 56 #define F_RCV_NORM 0x020 /* Don't delete recovery files. */ 57 #define F_RCV_ON 0x040 /* Recovery is possible. */ 58 #define F_UNDO 0x080 /* No change since last undo. */ 59 u_int8_t flags; 60 }; 61 62 /* Flags to db_get(). */ 63 #define DBG_FATAL 0x001 /* If DNE, error message. */ 64 #define DBG_NOCACHE 0x002 /* Ignore the front-end cache. */ 65 66 /* Flags to file_init() and file_write(). */ 67 #define FS_ALL 0x001 /* Write the entire file. */ 68 #define FS_APPEND 0x002 /* Append to the file. */ 69 #define FS_FORCE 0x004 /* Force is set. */ 70 #define FS_OPENERR 0x008 /* Open failed, try it again. */ 71 #define FS_POSSIBLE 0x010 /* Force could have been set. */ 72 #define FS_SETALT 0x020 /* Set alternate file name. */ 73 74 /* Flags to rcv_sync(). */ 75 #define RCV_EMAIL 0x01 /* Send the user email, IFF file modified. */ 76 #define RCV_ENDSESSION 0x02 /* End the file session. */ 77 #define RCV_PRESERVE 0x04 /* Preserve backup file, IFF file modified. */ 78 #define RCV_SNAPSHOT 0x08 /* Snapshot the recovery, and send email. */ 79