src/ndir.h

   1 /*
   2         <dir.h> -- definitions for 4.2BSD-compatible directory access
   3
   4         last edit:      09-Jul-1983     D A Gwyn
   5
   6  * The code here is forced by the interface, and is not subject to
   7  * copyright, constituting the only possible expression of the
   8  * algorithm in this format.
   9  */
  10
  11 #define DIRBLKSIZ       512             /* size of directory block */
  12 #ifdef WINDOWSNT
  13 #define MAXNAMLEN       255
  14 #else  /* not WINDOWSNT */
  15 #define MAXNAMLEN       15              /* maximum filename length */
  16 #endif /* not WINDOWSNT */
  17         /* NOTE:  MAXNAMLEN must be one less than a multiple of 4 */
  18
  19 struct direct                           /* data from readdir() */
  20         {
  21         long            d_ino;          /* inode number of entry */
  22         unsigned short  d_reclen;       /* length of this record */
  23         unsigned short  d_namlen;       /* length of string in d_name */
  24         char            d_name[MAXNAMLEN+1];    /* name of file */
  25         };
  26
  27 typedef struct
  28         {
  29         int     dd_fd;                  /* file descriptor */
  30         int     dd_loc;                 /* offset in block */
  31         int     dd_size;                /* amount of valid data */
  32         char    dd_buf[DIRBLKSIZ];      /* directory block */
  33         }       DIR;                    /* stream data from opendir() */
  34
  35 extern DIR              *opendir (char *);
  36 extern struct direct    *readdir (DIR *);
  37 extern void             seekdir (DIR *, long);
  38 extern void             closedir (DIR *);
  39
  40 #define rewinddir( dirp )       seekdir( dirp, 0L )
  41