1 files changed, 67 insertions, 0 deletions
diff --git a/libnetfs/io-seek.c b/libnetfs/io-seek.c
new file mode 100644
index 00000000..1dc7d322
--- /dev/null
+++ b/libnetfs/io-seek.c
@@ -0,0 +1,67 @@
+/* 
+   Copyright (C) 1995, 1996, 2000, 2006 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 <unistd.h>
+#include "netfs.h"
+#include "io_S.h"
+
+error_t
+netfs_S_io_seek (struct protid *user,
+		 off_t offset,
+		 int whence,
+		 off_t *newoffset)
+{
+  error_t err = 0;
+
+  if (!user)
+    return EOPNOTSUPP;
+
+  switch (whence)
+    {
+    case SEEK_CUR:
+      offset += user->po->filepointer;
+      goto check;
+    case SEEK_END:
+      {
+        struct node *np;
+
+        np = user->po->np;
+        pthread_mutex_lock (&np->lock);
+
+        err = netfs_validate_stat (np, user->user);
+        if (!err)
+	  offset += np->nn_stat.st_size;
+
+        pthread_mutex_unlock (&np->lock);
+      }
+    case SEEK_SET:
+    check:
+      if (offset >= 0)
+	{
+	  *newoffset = user->po->filepointer = offset;
+	  break;
+	}
+    default:
+      err = EINVAL;
+      break;
+    }
+
+  return err;
+}