From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Sat, 18 Feb 1995 01:27:10 +0000
Subject: initial import

---
 sysdeps/mach/hurd/readdir.c | 90 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 sysdeps/mach/hurd/readdir.c

(limited to 'sysdeps/mach/hurd/readdir.c')

diff --git a/sysdeps/mach/hurd/readdir.c b/sysdeps/mach/hurd/readdir.c
new file mode 100644
index 0000000000..185aeee2b1
--- /dev/null
+++ b/sysdeps/mach/hurd/readdir.c
@@ -0,0 +1,90 @@
+/* Copyright (C) 1993, 1994 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <limits.h>
+#include <stddef.h>
+#include <string.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <hurd.h>
+
+
+/* Read a directory entry from DIRP.  */
+struct dirent *
+DEFUN(readdir, (dirp), DIR *dirp)
+{
+  struct dirent *dp;
+
+  if (dirp == NULL)
+    {
+      errno = EINVAL;
+      return NULL;
+    }
+
+  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 = __dir_readdir (dirp->__port, &data, &dirp->__size,
+				   dirp->__entry_ptr, -1, 0, &nentries))
+	    return __hurd_fail (err), NULL;
+
+	  /* 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.  */
+	    return NULL;
+
+	  /* We trust the filesystem to return correct data and so we
+	     ignore NENTRIES.  */
+	}
+
+      dp = (struct dirent *) dirp->__ptr;
+      dirp->__ptr += dp->d_reclen;
+      ++dirp->__entry_ptr;
+
+      /* Loop to ignore deleted files.  */
+    } while (dp->d_fileno == 0);
+
+  return dp;
+}
-- 
cgit v1.2.1