1 files changed, 67 insertions, 0 deletions
diff --git a/libdiskfs/io-identity.c b/libdiskfs/io-identity.c
new file mode 100644
index 00000000..5717a7d2
--- /dev/null
+++ b/libdiskfs/io-identity.c
@@ -0,0 +1,67 @@
+/* libdiskfs implementation of io_identity RPC
+   Copyright (C) 1996, 1997, 1998 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 "priv.h"
+#include "io_S.h"
+
+/* Implement io_identity as described in <hurd/io.defs>. */
+error_t
+diskfs_S_io_identity (struct protid *cred,
+		      mach_port_t *id,
+		      mach_msg_type_name_t *idtype,
+		      mach_port_t *fsys,
+		      mach_msg_type_name_t *fsystype,
+		      int *fileno)
+{
+  struct node *np;
+  error_t err;
+  ino_t inum;
+
+  if (!cred)
+    return EOPNOTSUPP;
+
+  np = cred->po->np;
+  mutex_lock (&np->lock);
+  inum = np->dn_stat.st_ino;
+  mutex_unlock (&np->lock);
+
+  err = fshelp_get_identity (diskfs_port_bucket, inum, id);
+  if (! err)
+    {
+      if (cred->po->shadow_root && cred->po->shadow_root != diskfs_root_node)
+	{
+	  err = fshelp_get_identity (diskfs_port_bucket,
+				     cred->po->shadow_root->dn_stat.st_ino,
+				     fsys);
+	  if (err)
+	    mach_port_deallocate (mach_task_self (), *id);
+	}
+      else
+	*fsys = diskfs_fsys_identity;
+    }
+  if (! err)
+    {
+      *idtype = MACH_MSG_TYPE_MAKE_SEND;
+      *fsystype = MACH_MSG_TYPE_MAKE_SEND;
+      *fileno = np->dn_stat.st_ino;
+    }
+
+  return err;
+}