Initial revision

1 files changed, 49 insertions, 0 deletions

diff --git a/libnetfs/io-read.c b/libnetfs/io-read.c
new file mode 100644
index 00000000..4a6b777c
--- /dev/null
+++ b/libnetfs/io-read.c
@@ -0,0 +1,49 @@
+/* 
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell, p/BSG.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#include "netfs.h"
+
+error_t
+netfs_S_io_read (struct protid *user,
+		 char **data,
+		 mach_msg_type_number_t *datalen,
+		 off_t offset,
+		 mach_msg_type_number_t amount)
+{
+  error_t err;
+  int alloced = 0;
+
+  if (!user)
+    return EOPNOTSUPP;
+
+  if (amount > *datalen)
+    {
+      alloced = 1;
+      vm_allocate (mach_task_self (), (vm_address_t *) data, amount, 1);
+    }
+  *datalen = amount;
+
+  err = netfs_attempt_read (user->credential, user->po->np, 
+			    offset, datalen, *data);
+  if (err && alloced)
+    vm_deallocate (mach_task_self (), (vm_address_t) *data, amount);
+  return err;
+}
+