compiler/clib/dirfd.c

   1 /*
   2     Copyright © 1995-2003, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     POSIX function dirfd().
   6 */
   7
   8 #define DEBUG 0
   9 #include <aros/debug.h>
  10
  11 /*****************************************************************************
  12
  13     NAME */
  14 #include <dirent.h>
  15
  16         int dirfd(
  17
  18 /*  SYNOPSIS */
  19         DIR *dir)
  20
  21 /*  FUNCTION
  22         get directory stream file descriptor
  23
  24     INPUTS
  25         dir - directory stream dir.
  26
  27     RESULT
  28         on error -1 is returned.
  29
  30     NOTES
  31        This descriptor is the one used internally by the directory stream.  As
  32        a  result,  it  is  only useful for functions which do not depend on or
  33        alter the file position, such as fstat(2) and fchdir(2).   It  will  be
  34        automatically closed when closedir(3) is called.
  35
  36     EXAMPLE
  37
  38     BUGS
  39
  40     SEE ALSO
  41         open(), readdir(), closedir(), rewinddir(), seekdir(),
  42         telldir(), scandir()
  43
  44     INTERNALS
  45
  46 ******************************************************************************/
  47 {
  48   D(bug("dirfd(d_type=%d)=%d\n", dir->ent.d_type, dir->fd));
  49   if (dir->ent.d_type == DT_DIR)
  50     return dir->fd;
  51   return -1;
  52 }