arch/all-android/filesys/emul_handler/emul_dir.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 /* These two are needed for some definitions in emul_host.h */
   7 #include <sys/select.h>
   8 #include <sys/statfs.h>
   9
  10 /* This prevents redefinition of struct timeval */
  11 #define _AROS_TYPES_TIMEVAL_S_H_
  12
  13 #include <aros/debug.h>
  14
  15 #include "emul_intern.h"
  16 #include "emul_unix.h"
  17
  18 #define is_special_dir(x) (x[0] == '.' && (!x[1] || (x[1] == '.' && !x[2])))
  19
  20 /*
  21  * Bionic lacks seekdir() and telldir(), so we use the same approach as
  22  * in Windows version. See comments there for explaination.
  23  */
  24 struct dirent *ReadDir(struct emulbase *emulbase, struct filehandle *fh, IPTR *dirpos)
  25 {
  26     struct dirent *dir;
  27
  28     D(bug("[emul] Current dirpos %lu, requested %lu\n", fh->ph.dirpos, *dirpos));
  29     if (fh->ph.dirpos > *dirpos)
  30     {
  31         D(bug("[emul] Resetting search handle\n"));
  32
  33         /* The same as DoRewindDir(), just do not torture a semaphore */
  34         emulbase->pdata.SysIFace->rewinddir(fh->fd);
  35         fh->ph.dirpos = 0;
  36     }
  37
  38     do
  39     {
  40         do
  41         {
  42             dir = emulbase->pdata.SysIFace->readdir(fh->fd);
  43             if (!dir)
  44                 return NULL;
  45
  46             fh->ph.dirpos++;
  47             D(bug("[emul] Found %s, position %lu\n", dir->d_name, fh->ph.dirpos));
  48         } while (fh->ph.dirpos <= *dirpos);
  49
  50         (*dirpos)++;
  51         D(bug("[emul] New dirpos: %lu\n", *dirpos));
  52
  53     } while (is_special_dir(dir->d_name));
  54
  55     return dir;
  56 }