contrib/nvi2/common/exf.h

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