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

   1
   2 /*
   3  * dropsbr.h -- definitions for maildrop-style files
   4  */
   5
   6 /*
   7  * A file which is formatted like a maildrop may have a corresponding map
   8  * file which is an index to the bounds of each message.  The first record
   9  * of such an map is special, it contains:
  10  *
  11  *      d_id    = number of messages in file
  12  *      d_size  = version number of map
  13  *      d_start = last message read
  14  *      d_stop  = size of file
  15  *
  16  *  Each record after that contains:
  17  *
  18  *      d_id    = BBoard-ID: of message, or similar info
  19  *      d_size  = size of message in ARPA Internet octets (\n == 2 octets)
  20  *      d_start = starting position of message in file
  21  *      d_stop  = stopping position of message in file
  22  *
  23  * Note that d_start/d_stop do NOT include the message delimiters, so
  24  * programs using the map can simply fseek to d_start and keep reading
  25  * until the position is at d_stop.
  26  */
  27
  28 /*
  29  * various formats for maildrop files
  30  */
  31 #define OTHER_FORMAT 0
  32 #define MBOX_FORMAT  1
  33 #define MMDF_FORMAT  2
  34
  35 #define DRVRSN 3
  36
  37 struct drop {
  38     int   d_id;
  39     int   d_size;
  40     off_t d_start;
  41     off_t d_stop;
  42 };
  43
  44 /*
  45  * prototypes
  46  */
  47 int mbx_open (char *, int, uid_t, gid_t, mode_t);
  48 int mbx_read (FILE *, long, struct drop **, int);
  49 int mbx_write(char *, int, FILE *, int, long, long, off_t, int, int);
  50 int mbx_copy (char *, int, int, int, int, char *, int);
  51 int mbx_size (int, off_t, off_t);
  52 int mbx_close (char *, int);
  53 char *map_name (char *);
  54 int map_read (char *, long, struct drop **, int);
  55 int map_write (char *, int, int, long, off_t, off_t, long, int, int);
  56 int map_chk (char *, int, struct drop *, long, int);
  57