libnetfs: implement file_get_translator_cntl

This is a trivially adapted version of libdiskfs/file-get-transcntl.c.

* libnetfs/file-get-transcntl.c: New file.

3 files changed, 53 insertions, 9 deletions

diff --git a/libnetfs/Makefile b/libnetfs/Makefile
index 24b5acae..13c9b53b 100644
--- a/libnetfs/Makefile
+++ b/libnetfs/Makefile
@@ -34,7 +34,7 @@ FSSRCS= dir-link.c dir-lookup.c dir-mkdir.c dir-mkfile.c \
 	file-get-translator.c file-getcontrol.c file-getlinknode.c \
 	file-lock-stat.c file-lock.c file-set-size.c \
 	file-set-translator.c file-statfs.c file-sync.c file-syncfs.c \
-	file-utimes.c file-reparent.c fsstubs.c
+	file-utimes.c file-reparent.c fsstubs.c	file-get-transcntl.c
 
 IOSRCS=	io-read.c io-readable.c io-seek.c io-write.c io-stat.c io-async.c     \
 	io-set-all-openmodes.c io-get-openmodes.c io-set-some-openmodes.c     \
diff --git a/libnetfs/file-get-transcntl.c b/libnetfs/file-get-transcntl.c
new file mode 100644
index 00000000..04596d72
--- /dev/null
+++ b/libnetfs/file-get-transcntl.c
@@ -0,0 +1,52 @@
+/* libnetfs implementation of fs.defs: file_get_translator_cntl
+
+   Copyright (C) 1992, 1993, 1994, 1995, 1996 Free Software Foundation
+
+   This is a trivially adapted version of
+   libdiskfs/file-get-transcntl.c.
+
+   This program 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.
+
+   This program 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+#include "fs_S.h"
+
+/* Implement file_get_translator_cntl as described in <hurd/fs.defs>. */
+error_t
+netfs_S_file_get_translator_cntl (struct protid *cred,
+				  mach_port_t *ctl,
+				  mach_msg_type_name_t *ctltype)
+{
+  struct node *np;
+  error_t err;
+
+  if (!cred)
+    return EOPNOTSUPP;
+
+  np = cred->po->np;
+
+  pthread_mutex_lock (&np->lock);
+
+  err = fshelp_isowner (&np->nn_stat, cred->user);
+  if (!err)
+    err = fshelp_fetch_control (&np->transbox, ctl);
+  if (!err && *ctl == MACH_PORT_NULL)
+    err = ENXIO;
+  if (!err)
+    *ctltype = MACH_MSG_TYPE_MOVE_SEND;
+
+  pthread_mutex_unlock (&np->lock);
+
+  return err;
+}
diff --git a/libnetfs/fsstubs.c b/libnetfs/fsstubs.c
index 708cbb82..f1b9bf7e 100644
--- a/libnetfs/fsstubs.c
+++ b/libnetfs/fsstubs.c
@@ -30,14 +30,6 @@ netfs_S_file_notice_changes (struct protid *user,
 }
 
 error_t
-netfs_S_file_get_translator_cntl (struct protid *user,
-				  mach_port_t *trans,
-				  mach_msg_type_name_t *transtype)
-{
-  return EOPNOTSUPP;
-}
-
-error_t
 netfs_S_file_getfh (struct protid *user,
 		    char **data, mach_msg_type_number_t *ndata)
 {