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[PATCH 07/17] libnetfs: add fsys_get_children


From: Justus Winter
Subject: [PATCH 07/17] libnetfs: add fsys_get_children
Date: Thu, 11 Jul 2013 18:09:10 +0200

---
 libnetfs/Makefile              |    2 +-
 libnetfs/file-set-translator.c |   19 ++++++++++++++
 libnetfs/fsys-get-children.c   |   53 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 73 insertions(+), 1 deletion(-)
 create mode 100644 libnetfs/fsys-get-children.c

diff --git a/libnetfs/Makefile b/libnetfs/Makefile
index 24b5aca..4ac1350 100644
--- a/libnetfs/Makefile
+++ b/libnetfs/Makefile
@@ -44,7 +44,7 @@ IOSRCS=       io-read.c io-readable.c io-seek.c io-write.c 
io-stat.c io-async.c     \
        io-version.c
 
 FSYSSRCS= fsys-syncfs.c fsys-getroot.c fsys-get-options.c fsys-set-options.c \
-       fsys-goaway.c fsysstubs.c
+       fsys-goaway.c fsysstubs.c fsys-get-children.c
 
 IFSOCKSRCS=
 OTHERSRCS= drop-node.c init-init.c make-node.c make-peropen.c make-protid.c   \
diff --git a/libnetfs/file-set-translator.c b/libnetfs/file-set-translator.c
index b107ccd..887b4f5 100644
--- a/libnetfs/file-set-translator.c
+++ b/libnetfs/file-set-translator.c
@@ -20,6 +20,7 @@
 
 #include "netfs.h"
 #include <hurd/paths.h>
+#include <hurd/fshelp.h>
 #include <hurd/fsys.h>
 
 error_t
@@ -175,6 +176,24 @@ netfs_S_file_set_translator (struct protid *user,
        }
     }
 
+  if (! err && user->po->path)
+    {
+      err = fshelp_set_translator (user->po->path,
+                                   passive_flags, active_flags,
+                                   !!passivelen, active);
+    }
+
+  if (! err && active != MACH_PORT_NULL)
+    {
+      /* XXX noone acts on dead name notifications yet */
+      mach_port_t old;
+      err = mach_port_request_notification (mach_task_self (), active,
+                                            MACH_NOTIFY_DEAD_NAME, 0,
+                                            user->pi.port_right,
+                                            MACH_MSG_TYPE_MAKE_SEND_ONCE,
+                                            &old);
+    }
+
  out:
   pthread_mutex_unlock (&np->lock);
   return err;
diff --git a/libnetfs/fsys-get-children.c b/libnetfs/fsys-get-children.c
new file mode 100644
index 0000000..d1c9143
--- /dev/null
+++ b/libnetfs/fsys-get-children.c
@@ -0,0 +1,53 @@
+/* fsys_get_children
+
+   Copyright (C) 2013 Free Software Foundation, Inc.
+
+   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
+
+   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 the GNU Hurd; see the file COPYING.  If not, write to
+   the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "priv.h"
+
+/* Return any passive and active translators bound to nodes of the
+   receiving filesystem. children is a argz vector containing file
+   names relative to the root of the receiving translator.  */
+error_t
+netfs_S_fsys_get_children (mach_port_t server,
+                            mach_port_t reply,
+                            mach_msg_type_name_t replyPoly,
+                            char **children,
+                            mach_msg_type_number_t *children_len)
+{
+  error_t err;
+
+  char *c = NULL;
+  size_t c_len = 0;
+
+  err = fshelp_get_translators (&c, &c_len);
+  if (err)
+    goto errout;
+
+  err = iohelp_return_malloced_buffer (c, c_len, children, children_len);
+  if (err)
+    goto errout;
+
+  c = NULL; /* c was freed by iohelp_return_malloced_buffer. */
+
+ errout:
+  free (c);
+  return err;
+}
-- 
1.7.10.4




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