1 files changed, 73 insertions, 12 deletions

diff --git a/sysdeps/mach/hurd/readdir64.c b/sysdeps/mach/hurd/readdir64.c
index 2d03ec381b..1953e81b31 100644
--- a/sysdeps/mach/hurd/readdir64.c
+++ b/sysdeps/mach/hurd/readdir64.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001 Free Software Foundation, Inc.
+/* Copyright (C) 2001,02 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -17,25 +17,86 @@
    02111-1307 USA.  */
 
 #include <dirent.h>
-#include <limits.h>
 #include <stddef.h>
-#include <string.h>
+#include <hurd.h>
+#include <hurd/fs.h>
+#include <hurd/fd.h>
+#include "dirstream.h"
 
 /* Read a directory entry from DIRP.  */
 struct dirent64 *
 __readdir64 (DIR *dirp)
 {
-  struct dirent64 *result;
-  static union
-  {
-    struct dirent64 d;
-    char b[offsetof (struct dirent64, d_name) + UCHAR_MAX + 1];
-  } u;
-  int err;
+  struct dirent64 *dp;
 
-  err = __readdir64_r (dirp, &u.d, &result);
+  if (dirp == NULL)
+    {
+      errno = EINVAL;
+      return NULL;
+    }
 
-  return err ? NULL : result;
+  __libc_lock_lock (dirp->__lock);
+
+  do
+    {
+      if (dirp->__ptr - dirp->__data >= dirp->__size)
+	{
+	  /* We've emptied out our buffer.  Refill it.  */
+
+	  char *data = dirp->__data;
+	  int nentries;
+	  error_t err;
+
+	  if (err = HURD_FD_PORT_USE (dirp->__fd,
+				      __dir_readdir (port,
+						     &data, &dirp->__size,
+						     dirp->__entry_ptr,
+						     -1, 0, &nentries)))
+	    {
+	      __hurd_fail (err);
+	      dp = NULL;
+	      break;
+	    }
+
+	  /* DATA now corresponds to entry index DIRP->__entry_ptr.  */
+	  dirp->__entry_data = dirp->__entry_ptr;
+
+	  if (data != dirp->__data)
+	    {
+	      /* The data was passed out of line, so our old buffer is no
+		 longer useful.  Deallocate the old buffer and reset our
+		 information for the new buffer.  */
+	      __vm_deallocate (__mach_task_self (),
+			       (vm_address_t) dirp->__data,
+			       dirp->__allocation);
+	      dirp->__data = data;
+	      dirp->__allocation = round_page (dirp->__size);
+	    }
+
+	  /* Reset the pointer into the buffer.  */
+	  dirp->__ptr = dirp->__data;
+
+	  if (nentries == 0)
+	    {
+	      /* End of file.  */
+	      dp = NULL;
+	      break;
+	    }
+
+	  /* We trust the filesystem to return correct data and so we
+	     ignore NENTRIES.  */
+	}
+
+      dp = (struct dirent64 *) dirp->__ptr;
+      dirp->__ptr += dp->d_reclen;
+      ++dirp->__entry_ptr;
+
+      /* Loop to ignore deleted files.  */
+    } while (dp->d_fileno == 0);
+
+  __libc_lock_unlock (dirp->__lock);
+
+  return dp;
 }
 
 weak_alias (__readdir64, readdir64)