lib/libc/posix/_readdir.c

   1 /*      readdir()                                       Author: Kees J. Bot
   2  *                                                              24 Apr 1989
   3  */
   4 #define nil 0
   5 #define readdir _readdir
   6 #define getdents _getdents
   7 #include <sys/types.h>
   8 #include <dirent.h>
   9 #include <unistd.h>
  10 #include <stddef.h>
  11 #include <stdlib.h>
  12 #include <errno.h>
  13 #include <string.h>
  14
  15 struct dirent *readdir(DIR *dp)
  16 /* Return the next entry in a directory. */
  17 {
  18         struct dirent *entp;
  19         int count, pos, reclen;
  20
  21         if (dp == nil) { errno= EBADF; return nil; }
  22
  23         count= dp->_count;
  24         pos= dp->_pos;
  25         if (count == 0 || pos >= count)
  26         {
  27                 count= getdents(dp->_fd, (struct dirent *)dp->_buf,
  28                         sizeof(dp->_buf));
  29                 if (count <= 0) return nil;
  30                 dp->_count= count;
  31                 dp->_pos= pos= 0;
  32         }
  33         entp= (struct dirent *)&((char *)dp->_buf)[pos];
  34         reclen= entp->d_reclen;
  35         dp->_pos= pos+reclen;
  36
  37         return entp;
  38 }
  39
  40 /*
  41  * $PchId: _readdir.c,v 1.6 2005/01/27 21:46:42 philip Exp $
  42  */