gio/gopenuriportal.c - third_party/glib - Git at Google

 /* GIO - GLib Input, Output and Streaming Library
  *
  * Copyright 2017 Red Hat, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */

 #include "config.h"

 #include <sys/stat.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <string.h>

 #include "gopenuriportal.h"
 #include "xdp-dbus.h"
 #include "gstdio.h"

 #ifdef G_OS_UNIX
 #include "gunixfdlist.h"
 #endif

 #ifndef O_PATH
 #define O_PATH 0
 #endif
 #ifndef O_CLOEXEC
 #define O_CLOEXEC 0
 #else
 #define HAVE_O_CLOEXEC 1
 #endif


 static GXdpOpenURI *openuri;

 static gboolean
 init_openuri_portal (void)
 {
   static gsize openuri_inited = 0;

   if (g_once_init_enter (&openuri_inited))
     {
       GError *error = NULL;
       GDBusConnection *connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);

       if (connection != NULL)
         {
           openuri = gxdp_open_uri_proxy_new_sync (connection, 0,
                                                   "org.freedesktop.portal.Desktop",
                                                   "/org/freedesktop/portal/desktop",
                                                   NULL, &error);
           if (openuri == NULL)
             {
               g_warning ("Cannot create document portal proxy: %s", error->message);
               g_error_free (error);
             }

           g_object_unref (connection);
         }
       else
         {
           g_warning ("Cannot connect to session bus when initializing document portal: %s",
                      error->message);
           g_error_free (error);
         }

       g_once_init_leave (&openuri_inited, 1);
     }

   return openuri != NULL;
 }

 gboolean
 g_openuri_portal_open_uri (const char  *uri,
                            const char  *parent_window,
                            GError     **error)
 {
   GFile *file = NULL;
   GVariantBuilder opt_builder;
   gboolean res;

   if (!init_openuri_portal ())
     {
       g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_INITIALIZED,
                    "OpenURI portal is not available");
       return FALSE;
     }

   g_variant_builder_init (&opt_builder, G_VARIANT_TYPE_VARDICT);

   file = g_file_new_for_uri (uri);
   if (g_file_is_native (file))
     {
       char *path = NULL;
       GUnixFDList *fd_list = NULL;
       int fd, fd_id, errsv;

       path = g_file_get_path (file);

       fd = g_open (path, O_PATH | O_CLOEXEC);
       errsv = errno;
       if (fd == -1)
         {
           g_set_error (error, G_IO_ERROR, g_io_error_from_errno (errsv),
                        "Failed to open '%s'", path);
           return FALSE;
         }

 #ifndef HAVE_O_CLOEXEC
       fcntl (fd, F_SETFD, FD_CLOEXEC);
 #endif
       fd_list = g_unix_fd_list_new_from_array (&fd, 1);
       fd = -1;
       fd_id = 0;

       res = gxdp_open_uri_call_open_file_sync (openuri,
                                                parent_window ? parent_window : "",
                                                g_variant_new ("h", fd_id),
                                                g_variant_builder_end (&opt_builder),
                                                fd_list,
                                                NULL,
                                                NULL,
                                                NULL,
                                                error);
       g_free (path);
       g_object_unref (fd_list);
     }
   else
     {
       res = gxdp_open_uri_call_open_uri_sync (openuri,
                                               parent_window ? parent_window : "",
                                               uri,
                                               g_variant_builder_end (&opt_builder),
                                               NULL,
                                               NULL,
                                               error);
     }

   g_object_unref (file);

   return res;
 }

 enum {
   XDG_DESKTOP_PORTAL_SUCCESS   = 0,
   XDG_DESKTOP_PORTAL_CANCELLED = 1,
   XDG_DESKTOP_PORTAL_FAILED    = 2
 };

 static void
 response_received (GDBusConnection *connection,
                    const char      *sender_name,
                    const char      *object_path,
                    const char      *interface_name,
                    const char      *signal_name,
                    GVariant        *parameters,
                    gpointer         user_data)
 {
   GTask *task = user_data;
   guint32 response;
   guint signal_id;

   signal_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (task), "signal-id"));
   g_dbus_connection_signal_unsubscribe (connection, signal_id);

   g_variant_get (parameters, "(u@a{sv})", &response, NULL);

   switch (response)
     {
     case XDG_DESKTOP_PORTAL_SUCCESS:
       g_task_return_boolean (task, TRUE);
       break;
     case XDG_DESKTOP_PORTAL_CANCELLED:
       g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_CANCELLED, "Launch cancelled");
       break;
     case XDG_DESKTOP_PORTAL_FAILED:
     default:
       g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED, "Launch failed");
       break;
     }

   g_object_unref (task);
 }

 static void
 open_call_done (GObject      *source,
                 GAsyncResult *result,
                 gpointer      user_data)
 {
   GXdpOpenURI *openuri = GXDP_OPEN_URI (source);
   GDBusConnection *connection;
   GTask *task = user_data;
   GError *error = NULL;
   gboolean open_file;
   gboolean res;
   char *path = NULL;
   const char *handle;
   guint signal_id;

   connection = g_dbus_proxy_get_connection (G_DBUS_PROXY (openuri));
   open_file = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (task), "open-file"));

   if (open_file)
     res = gxdp_open_uri_call_open_file_finish (openuri, &path, NULL, result, &error);
   else
     res = gxdp_open_uri_call_open_uri_finish (openuri, &path, result, &error);

   if (!res)
     {
       g_task_return_error (task, error);
       g_object_unref (task);
       g_free (path);
       return;
     }

   handle = (const char *)g_object_get_data (G_OBJECT (task), "handle");
   if (g_strcmp0 (handle, path) != 0)
     {
       signal_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (task), "signal-id"));
       g_dbus_connection_signal_unsubscribe (connection, signal_id);

       signal_id = g_dbus_connection_signal_subscribe (connection,
                                                       "org.freedesktop.portal.Desktop",
                                                       "org.freedesktop.portal.Request",
                                                       "Response",
                                                       path,
                                                       NULL,
                                                       G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE,
                                                       response_received,
                                                       task,
                                                       NULL);
       g_object_set_data (G_OBJECT (task), "signal-id", GINT_TO_POINTER (signal_id));
     }
 }

 void
 g_openuri_portal_open_uri_async (const char          *uri,
                                  const char          *parent_window,
                                  GCancellable        *cancellable,
                                  GAsyncReadyCallback  callback,
                                  gpointer             user_data)
 {
   GDBusConnection *connection;
   GTask *task;
   GFile *file;
   GVariant *opts = NULL;
   int i;
   guint signal_id;

   if (!init_openuri_portal ())
     {
       g_task_report_new_error (NULL, callback, user_data, NULL,
                                G_IO_ERROR, G_IO_ERROR_NOT_INITIALIZED,
                                "OpenURI portal is not available");
       return;
     }

   connection = g_dbus_proxy_get_connection (G_DBUS_PROXY (openuri));

   if (callback)
     {
       GVariantBuilder opt_builder;
       char *token;
       char *sender;
       char *handle;

       task = g_task_new (NULL, cancellable, callback, user_data);

       token = g_strdup_printf ("gio%d", g_random_int_range (0, G_MAXINT));
       sender = g_strdup (g_dbus_connection_get_unique_name (connection) + 1);
       for (i = 0; sender[i]; i++)
         if (sender[i] == '.')
           sender[i] = '_';

       handle = g_strdup_printf ("/org/fredesktop/portal/desktop/request/%s/%s", sender, token);
       g_object_set_data_full (G_OBJECT (task), "handle", handle, g_free);
       g_free (sender);

       signal_id = g_dbus_connection_signal_subscribe (connection,
                                                       "org.freedesktop.portal.Desktop",
                                                       "org.freedesktop.portal.Request",
                                                       "Response",
                                                       handle,
                                                       NULL,
                                                       G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE,
                                                       response_received,
                                                       task,
                                                       NULL);
       g_object_set_data (G_OBJECT (task), "signal-id", GINT_TO_POINTER (signal_id));

       g_variant_builder_init (&opt_builder, G_VARIANT_TYPE_VARDICT);
       g_variant_builder_add (&opt_builder, "{sv}", "handle_token", g_variant_new_string (token));
       g_free (token);

       opts = g_variant_builder_end (&opt_builder);
     }
   else
     task = NULL;

   file = g_file_new_for_uri (uri);
   if (g_file_is_native (file))
     {
       char *path = NULL;
       GUnixFDList *fd_list = NULL;
       int fd, fd_id, errsv;

       if (task)
         g_object_set_data (G_OBJECT (task), "open-file", GINT_TO_POINTER (TRUE));

       path = g_file_get_path (file);
       fd = g_open (path, O_PATH | O_CLOEXEC);
       errsv = errno;
       if (fd == -1)
         {
           g_task_report_new_error (NULL, callback, user_data, NULL,
                                    G_IO_ERROR, g_io_error_from_errno (errsv),
                                    "OpenURI portal is not available");
           return;
         }

 #ifndef HAVE_O_CLOEXEC
       fcntl (fd, F_SETFD, FD_CLOEXEC);
 #endif
       fd_list = g_unix_fd_list_new_from_array (&fd, 1);
       fd = -1;
       fd_id = 0;

       gxdp_open_uri_call_open_file (openuri,
                                     parent_window ? parent_window : "",
                                     g_variant_new ("h", fd_id),
                                     opts,
                                     fd_list,
                                     cancellable,
                                     task ? open_call_done : NULL,
                                     task);
       g_object_unref (fd_list);
       g_free (path);
     }
   else
     {
       gxdp_open_uri_call_open_uri (openuri,
                                    parent_window ? parent_window : "",
                                    uri,
                                    opts,
                                    cancellable,
                                    task ? open_call_done : NULL,
                                    task);
     }

   g_object_unref (file);
 }

 gboolean
 g_openuri_portal_open_uri_finish (GAsyncResult  *result,
                                   GError       **error)
 {
   return g_task_propagate_boolean (G_TASK (result), error);
 }
	/* GIO - GLib Input, Output and Streaming Library
	*
	* Copyright 2017 Red Hat, Inc.
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* This library 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
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	*/

	#include "config.h"

	#include <sys/stat.h>
	#include <fcntl.h>
	#include <errno.h>
	#include <string.h>

	#include "gopenuriportal.h"
	#include "xdp-dbus.h"
	#include "gstdio.h"

	#ifdef G_OS_UNIX
	#include "gunixfdlist.h"
	#endif

	#ifndef O_PATH
	#define O_PATH 0
	#endif
	#ifndef O_CLOEXEC
	#define O_CLOEXEC 0
	#else
	#define HAVE_O_CLOEXEC 1
	#endif


	static GXdpOpenURI *openuri;

	static gboolean
	init_openuri_portal (void)
	{
	static gsize openuri_inited = 0;

	if (g_once_init_enter (&openuri_inited))
	{
	GError *error = NULL;
	GDBusConnection *connection = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);

	if (connection != NULL)
	{
	openuri = gxdp_open_uri_proxy_new_sync (connection, 0,
	"org.freedesktop.portal.Desktop",
	"/org/freedesktop/portal/desktop",
	NULL, &error);
	if (openuri == NULL)
	{
	g_warning ("Cannot create document portal proxy: %s", error->message);
	g_error_free (error);
	}

	g_object_unref (connection);
	}
	else
	{
	g_warning ("Cannot connect to session bus when initializing document portal: %s",
	error->message);
	g_error_free (error);
	}

	g_once_init_leave (&openuri_inited, 1);
	}

	return openuri != NULL;
	}

	gboolean
	g_openuri_portal_open_uri (const char *uri,
	const char *parent_window,
	GError **error)
	{
	GFile *file = NULL;
	GVariantBuilder opt_builder;
	gboolean res;

	if (!init_openuri_portal ())
	{
	g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_INITIALIZED,
	"OpenURI portal is not available");
	return FALSE;
	}

	g_variant_builder_init (&opt_builder, G_VARIANT_TYPE_VARDICT);

	file = g_file_new_for_uri (uri);
	if (g_file_is_native (file))
	{
	char *path = NULL;
	GUnixFDList *fd_list = NULL;
	int fd, fd_id, errsv;

	path = g_file_get_path (file);

	fd = g_open (path, O_PATH \| O_CLOEXEC);
	errsv = errno;
	if (fd == -1)
	{
	g_set_error (error, G_IO_ERROR, g_io_error_from_errno (errsv),
	"Failed to open '%s'", path);
	return FALSE;
	}

	#ifndef HAVE_O_CLOEXEC
	fcntl (fd, F_SETFD, FD_CLOEXEC);
	#endif
	fd_list = g_unix_fd_list_new_from_array (&fd, 1);
	fd = -1;
	fd_id = 0;

	res = gxdp_open_uri_call_open_file_sync (openuri,
	parent_window ? parent_window : "",
	g_variant_new ("h", fd_id),
	g_variant_builder_end (&opt_builder),
	fd_list,
	NULL,
	NULL,
	NULL,
	error);
	g_free (path);
	g_object_unref (fd_list);
	}
	else
	{
	res = gxdp_open_uri_call_open_uri_sync (openuri,
	parent_window ? parent_window : "",
	uri,
	g_variant_builder_end (&opt_builder),
	NULL,
	NULL,
	error);
	}

	g_object_unref (file);

	return res;
	}

	enum {
	XDG_DESKTOP_PORTAL_SUCCESS = 0,
	XDG_DESKTOP_PORTAL_CANCELLED = 1,
	XDG_DESKTOP_PORTAL_FAILED = 2
	};

	static void
	response_received (GDBusConnection *connection,
	const char *sender_name,
	const char *object_path,
	const char *interface_name,
	const char *signal_name,
	GVariant *parameters,
	gpointer user_data)
	{
	GTask *task = user_data;
	guint32 response;
	guint signal_id;

	signal_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (task), "signal-id"));
	g_dbus_connection_signal_unsubscribe (connection, signal_id);

	g_variant_get (parameters, "(u@a{sv})", &response, NULL);

	switch (response)
	{
	case XDG_DESKTOP_PORTAL_SUCCESS:
	g_task_return_boolean (task, TRUE);
	break;
	case XDG_DESKTOP_PORTAL_CANCELLED:
	g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_CANCELLED, "Launch cancelled");
	break;
	case XDG_DESKTOP_PORTAL_FAILED:
	default:
	g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED, "Launch failed");
	break;
	}

	g_object_unref (task);
	}

	static void
	open_call_done (GObject *source,
	GAsyncResult *result,
	gpointer user_data)
	{
	GXdpOpenURI *openuri = GXDP_OPEN_URI (source);
	GDBusConnection *connection;
	GTask *task = user_data;
	GError *error = NULL;
	gboolean open_file;
	gboolean res;
	char *path = NULL;
	const char *handle;
	guint signal_id;

	connection = g_dbus_proxy_get_connection (G_DBUS_PROXY (openuri));
	open_file = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (task), "open-file"));

	if (open_file)
	res = gxdp_open_uri_call_open_file_finish (openuri, &path, NULL, result, &error);
	else
	res = gxdp_open_uri_call_open_uri_finish (openuri, &path, result, &error);

	if (!res)
	{
	g_task_return_error (task, error);
	g_object_unref (task);
	g_free (path);
	return;
	}

	handle = (const char *)g_object_get_data (G_OBJECT (task), "handle");
	if (g_strcmp0 (handle, path) != 0)
	{
	signal_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (task), "signal-id"));
	g_dbus_connection_signal_unsubscribe (connection, signal_id);

	signal_id = g_dbus_connection_signal_subscribe (connection,
	"org.freedesktop.portal.Desktop",
	"org.freedesktop.portal.Request",
	"Response",
	path,
	NULL,
	G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE,
	response_received,
	task,
	NULL);
	g_object_set_data (G_OBJECT (task), "signal-id", GINT_TO_POINTER (signal_id));
	}
	}

	void
	g_openuri_portal_open_uri_async (const char *uri,
	const char *parent_window,
	GCancellable *cancellable,
	GAsyncReadyCallback callback,
	gpointer user_data)
	{
	GDBusConnection *connection;
	GTask *task;
	GFile *file;
	GVariant *opts = NULL;
	int i;
	guint signal_id;

	if (!init_openuri_portal ())
	{
	g_task_report_new_error (NULL, callback, user_data, NULL,
	G_IO_ERROR, G_IO_ERROR_NOT_INITIALIZED,
	"OpenURI portal is not available");
	return;
	}

	connection = g_dbus_proxy_get_connection (G_DBUS_PROXY (openuri));

	if (callback)
	{
	GVariantBuilder opt_builder;
	char *token;
	char *sender;
	char *handle;

	task = g_task_new (NULL, cancellable, callback, user_data);

	token = g_strdup_printf ("gio%d", g_random_int_range (0, G_MAXINT));
	sender = g_strdup (g_dbus_connection_get_unique_name (connection) + 1);
	for (i = 0; sender[i]; i++)
	if (sender[i] == '.')
	sender[i] = '_';

	handle = g_strdup_printf ("/org/fredesktop/portal/desktop/request/%s/%s", sender, token);
	g_object_set_data_full (G_OBJECT (task), "handle", handle, g_free);
	g_free (sender);

	signal_id = g_dbus_connection_signal_subscribe (connection,
	"org.freedesktop.portal.Desktop",
	"org.freedesktop.portal.Request",
	"Response",
	handle,
	NULL,
	G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE,
	response_received,
	task,
	NULL);
	g_object_set_data (G_OBJECT (task), "signal-id", GINT_TO_POINTER (signal_id));

	g_variant_builder_init (&opt_builder, G_VARIANT_TYPE_VARDICT);
	g_variant_builder_add (&opt_builder, "{sv}", "handle_token", g_variant_new_string (token));
	g_free (token);

	opts = g_variant_builder_end (&opt_builder);
	}
	else
	task = NULL;

	file = g_file_new_for_uri (uri);
	if (g_file_is_native (file))
	{
	char *path = NULL;
	GUnixFDList *fd_list = NULL;
	int fd, fd_id, errsv;

	if (task)
	g_object_set_data (G_OBJECT (task), "open-file", GINT_TO_POINTER (TRUE));

	path = g_file_get_path (file);
	fd = g_open (path, O_PATH \| O_CLOEXEC);
	errsv = errno;
	if (fd == -1)
	{
	g_task_report_new_error (NULL, callback, user_data, NULL,
	G_IO_ERROR, g_io_error_from_errno (errsv),
	"OpenURI portal is not available");
	return;
	}

	#ifndef HAVE_O_CLOEXEC
	fcntl (fd, F_SETFD, FD_CLOEXEC);
	#endif
	fd_list = g_unix_fd_list_new_from_array (&fd, 1);
	fd = -1;
	fd_id = 0;

	gxdp_open_uri_call_open_file (openuri,
	parent_window ? parent_window : "",
	g_variant_new ("h", fd_id),
	opts,
	fd_list,
	cancellable,
	task ? open_call_done : NULL,
	task);
	g_object_unref (fd_list);
	g_free (path);
	}
	else
	{
	gxdp_open_uri_call_open_uri (openuri,
	parent_window ? parent_window : "",
	uri,
	opts,
	cancellable,
	task ? open_call_done : NULL,
	task);
	}

	g_object_unref (file);
	}

	gboolean
	g_openuri_portal_open_uri_finish (GAsyncResult *result,
	GError **error)
	{
	return g_task_propagate_boolean (G_TASK (result), error);
	}