Initial revision

1 files changed, 60 insertions, 0 deletions

diff --git a/libnetfs/file-getcontrol.c b/libnetfs/file-getcontrol.c
new file mode 100644
index 00000000..7c4f1fee
--- /dev/null
+++ b/libnetfs/file-getcontrol.c
@@ -0,0 +1,60 @@
+/* Return the filesystem corresponding to a file
+ 
+   Copyright (C) 1995, 1996 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"
+#include "fsys_S.h"
+
+error_t
+netfs_S_file_getcontrol (struct protid *user,
+			 mach_port_t *control,
+			 mach_msg_type_name_t *controltype)
+{
+  struct port_info *pi;
+  uid_t *uids, *gids;
+  int nuids, ngids;
+  int i;
+
+  if (!user)
+    return EOPNOTSUPP;
+  
+  mutex_lock (&user->po->np->lock);
+  netfs_interpret_credential (user->credential, &uids, &nuids, &gids, &ngids);
+  mutex_unlock (&user->po->np->lock);
+  free (gids);
+  
+  for (i = 0; i < nuids; i++)
+    if (uids[i] == 0)
+      {
+	/* They've got root; give it to them. */
+	free (uids);
+	pi = ports_allocate_port (netfs_port_bucket,
+				  sizeof (struct port_info),
+				  netfs_control_class);
+	*control = ports_get_right (pi);
+	*controltype = MACH_MSG_TYPE_MAKE_SEND;
+	ports_port_deref (pi);
+	return 0;
+      }
+  
+  /* Not got root. */
+  free (uids);
+  return EPERM;
+}