Initial work for daemon side write support

Original git commit by Alexander Larsson <alex@greebo.(none)> at 1171642429 +0100

svn path=/trunk/; revision=359

1 files changed, 204 insertions, 0 deletions

diff --git a/daemon/gvfsjobopenforwrite.c b/daemon/gvfsjobopenforwrite.c
new file mode 100644
index 00000000..37c65804
--- /dev/null
+++ b/daemon/gvfsjobopenforwrite.c
@@ -0,0 +1,204 @@
+#include <config.h>
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <glib.h>
+#include <dbus/dbus.h>
+#include <glib/gi18n.h>
+#include "gvfswritechannel.h"
+#include "gvfsjobopenforwrite.h"
+#include "gdbusutils.h"
+#include "gvfsdaemonutils.h"
+
+G_DEFINE_TYPE (GVfsJobOpenForWrite, g_vfs_job_open_for_write, G_VFS_TYPE_JOB_DBUS);
+
+static void         run          (GVfsJob        *job);
+static gboolean     try          (GVfsJob        *job);
+static void         finished     (GVfsJob        *job);
+static DBusMessage *create_reply (GVfsJob        *job,
+				  DBusConnection *connection,
+				  DBusMessage    *message);
+
+static void
+g_vfs_job_open_for_write_finalize (GObject *object)
+{
+  GVfsJobOpenForWrite *job;
+
+  job = G_VFS_JOB_OPEN_FOR_WRITE (object);
+
+  /* TODO: manage backend_handle if not put in write channel */
+
+  if (job->write_channel)
+    g_object_unref (job->write_channel);
+  
+  g_free (job->filename);
+  
+  if (G_OBJECT_CLASS (g_vfs_job_open_for_write_parent_class)->finalize)
+    (*G_OBJECT_CLASS (g_vfs_job_open_for_write_parent_class)->finalize) (object);
+}
+
+static void
+g_vfs_job_open_for_write_class_init (GVfsJobOpenForWriteClass *klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  GVfsJobClass *job_class = G_VFS_JOB_CLASS (klass);
+  GVfsJobDBusClass *job_dbus_class = G_VFS_JOB_DBUS_CLASS (klass);
+  
+  gobject_class->finalize = g_vfs_job_open_for_write_finalize;
+  job_class->run = run;
+  job_class->try = try;
+  job_class->finished = finished;
+  job_dbus_class->create_reply = create_reply;
+}
+
+static void
+g_vfs_job_open_for_write_init (GVfsJobOpenForWrite *job)
+{
+}
+
+GVfsJob *
+g_vfs_job_open_for_write_new (DBusConnection *connection,
+			      DBusMessage *message,
+			      GVfsBackend *backend)
+{
+  GVfsJobOpenForWrite *job;
+  DBusMessageIter iter;
+  DBusMessage *reply;
+  DBusError derror;
+  char *path;
+  guint16 mode;
+  dbus_bool_t make_backup;
+  guint64 mtime;
+
+  path = NULL;
+  dbus_error_init (&derror);
+  dbus_message_iter_init (message, &iter);
+  if (!_g_dbus_message_iter_get_args (&iter, &derror, 
+				      G_DBUS_TYPE_CSTRING, &path,
+				      DBUS_TYPE_UINT16, &mode,
+				      DBUS_TYPE_UINT64, &mtime,
+				      DBUS_TYPE_BOOLEAN, &make_backup,
+				      0))
+    {
+      reply = dbus_message_new_error (message,
+				      derror.name,
+                                      derror.message);
+      dbus_error_free (&derror);
+
+      dbus_connection_send (connection, reply, NULL);
+      g_free (path);
+      return NULL;
+    }
+  
+  job = g_object_new (G_VFS_TYPE_JOB_OPEN_FOR_WRITE,
+		      "message", message,
+		      "connection", connection,
+		      NULL);
+
+  job->filename = path;
+  job->mode = mode;
+  job->mtime = (time_t)mtime;
+  job->make_backup = make_backup;
+  job->backend = backend;
+  
+  return G_VFS_JOB (job);
+}
+
+static void
+run (GVfsJob *job)
+{
+  GVfsJobOpenForWrite *op_job = G_VFS_JOB_OPEN_FOR_WRITE (job);
+  GVfsBackendClass *class = G_VFS_BACKEND_GET_CLASS (op_job->backend);
+
+  class->create (op_job->backend,
+		 op_job,
+		 op_job->filename);
+}
+
+static gboolean
+try (GVfsJob *job)
+{
+  GVfsJobOpenForWrite *op_job = G_VFS_JOB_OPEN_FOR_WRITE (job);
+  GVfsBackendClass *class = G_VFS_BACKEND_GET_CLASS (op_job->backend);
+
+  if (class->try_create == NULL)
+    return FALSE;
+  
+  return class->try_create (op_job->backend,
+			    op_job,
+			    op_job->filename);
+}
+
+void
+g_vfs_job_open_for_write_set_handle (GVfsJobOpenForWrite *job,
+				     GVfsBackendHandle handle)
+{
+  job->backend_handle = handle;
+}
+
+void
+g_vfs_job_open_for_write_set_can_seek (GVfsJobOpenForWrite *job,
+				       gboolean            can_seek)
+{
+  job->can_seek = can_seek;
+}
+
+/* Might be called on an i/o thwrite */
+static DBusMessage *
+create_reply (GVfsJob *job,
+	      DBusConnection *connection,
+	      DBusMessage *message)
+{
+  GVfsJobOpenForWrite *open_job = G_VFS_JOB_OPEN_FOR_WRITE (job);
+  GVfsWriteChannel *channel;
+  DBusMessage *reply;
+  GError *error;
+  int remote_fd;
+  int fd_id;
+  gboolean res;
+  dbus_bool_t can_seek;
+
+  g_assert (open_job->backend_handle != NULL);
+
+  error = NULL;
+  channel = g_vfs_write_channel_new (open_job->backend);
+
+  remote_fd = g_vfs_channel_steal_remote_fd (G_VFS_CHANNEL (channel));
+  if (!dbus_connection_send_fd (connection, 
+				remote_fd,
+				&fd_id, &error))
+    {
+      close (remote_fd);
+      reply = _dbus_message_new_error_from_gerror (message, error);
+      g_error_free (error);
+      g_object_unref (channel);
+      return reply;
+    }
+  close (remote_fd);
+
+  reply = dbus_message_new_method_return (message);
+  can_seek = open_job->can_seek;
+  res = dbus_message_append_args (reply,
+				  DBUS_TYPE_UINT32, &fd_id,
+				  DBUS_TYPE_BOOLEAN, &can_seek,
+				  DBUS_TYPE_INVALID);
+
+  g_vfs_channel_set_backend_handle (G_VFS_CHANNEL (channel), open_job->backend_handle);
+  open_job->backend_handle = NULL;
+  open_job->write_channel = channel;
+  
+  return reply;
+}
+
+static void
+finished (GVfsJob *job)
+{
+  GVfsJobOpenForWrite *open_job = G_VFS_JOB_OPEN_FOR_WRITE (job);
+
+  if (open_job->write_channel)
+    g_signal_emit_by_name (job, "new-source", open_job->write_channel);
+  
+}