diplodocus.org Git - nmh/blob - h/dropsbr.h

   1 /* dropsbr.h -- definitions for maildrop-style files
   2  */
   3
   4 /*
   5  * A file which is formatted like a maildrop may have a corresponding map
   6  * file which is an index to the bounds of each message.  The first record
   7  * of such an map is special, it contains:
   8  *
   9  *      d_id    = number of messages in file
  10  *      d_size  = version number of map
  11  *      d_start = last message read
  12  *      d_stop  = size of file
  13  *
  14  *  Each record after that contains:
  15  *
  16  *      d_id    = BBoard-ID: of message, or similar info
  17  *      d_size  = size of message in ARPA Internet octets (\n == 2 octets)
  18  *      d_start = starting position of message in file
  19  *      d_stop  = stopping position of message in file
  20  *
  21  * Note that d_start/d_stop do NOT include the message delimiters, so
  22  * programs using the map can simply fseek to d_start and keep reading
  23  * until the position is at d_stop.
  24  */
  25
  26 /*
  27  * various formats for maildrop files
  28  */
  29 #define OTHER_FORMAT 0
  30 #define MBOX_FORMAT  1
  31 #define MMDF_FORMAT  2
  32
  33 #define DRVRSN 3
  34
  35 struct drop {
  36     int   d_id;
  37     int   d_size;
  38     off_t d_start;
  39     off_t d_stop;
  40 };
  41
  42 /*
  43  * prototypes
  44  */
  45 int mbx_open (char *, int, uid_t, gid_t, mode_t);
  46 int mbx_read (FILE *, long, struct drop **);
  47 int mbx_write(char *, int, FILE *, int, long, long, off_t, int, int);
  48 int mbx_copy (char *, int, int, int, int, char *, int);
  49 int mbx_size (int, off_t, off_t);
  50 int mbx_close (char *, int);
  51 char *map_name (char *);
  52 int map_read (char *, long, struct drop **, int);
  53 int map_write (char *, int, int, long, off_t, off_t, long, int, int);
  54 int map_chk (char *, int, struct drop *, long, int);