util: add socketpair GDBusConnection helper

This commit is contained in:
Christian Hergert 2023-02-26 10:57:50 -08:00
parent 294e01836d
commit 98032981cd
2 changed files with 141 additions and 1 deletions

View File

@ -22,6 +22,7 @@
#include <cairo.h>
#include <gdk/gdk.h>
#include <gio/gio.h>
G_BEGIN_DECLS
@ -32,5 +33,12 @@ G_BEGIN_DECLS
CAIRO_VERSION_MICRO >= (micro)))
gboolean mks_scroll_event_is_inverted (GdkEvent *event);
void mks_socketpair_connection_new (GDBusConnectionFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
GDBusConnection *mks_socketpair_connection_new_finish (GAsyncResult *result,
int *peer_fd,
GError **error);
G_END_DECLS

View File

@ -20,6 +20,9 @@
#include "config.h"
#include <glib/gstdio.h>
#include <sys/socket.h>
#include "mks-util-private.h"
static GSettings *mouse_settings;
@ -86,3 +89,132 @@ mks_scroll_event_is_inverted (GdkEvent *event)
return FALSE;
}
}
static gboolean
create_socketpair (int *us,
int *them,
GError **error)
{
int fds[2];
int rv;
rv = socketpair (AF_UNIX, SOCK_STREAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0, fds);
if (rv != 0)
{
int errsv = errno;
g_set_error_literal (error,
G_IO_ERROR,
g_io_error_from_errno (errsv),
g_strerror (errsv));
return FALSE;
}
*us = fds[0];
*them = fds[1];
return TRUE;
}
static void
fdptr_clear (gpointer data)
{
int *fdptr = data;
if (*fdptr != -1)
close (*fdptr);
*fdptr = -1;
g_free (fdptr);
}
static void
mks_socketpair_connection_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
g_autoptr(GTask) task = user_data;
g_autoptr(GDBusConnection) ret = NULL;
g_autoptr(GError) error = NULL;
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (G_IS_TASK (task));
if (!(ret = g_dbus_connection_new_finish (result, &error)))
g_task_return_error (task, g_steal_pointer (&error));
else
g_task_return_pointer (task, g_steal_pointer (&ret), g_object_unref);
}
void
mks_socketpair_connection_new (GDBusConnectionFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GSocketConnection) io_stream = NULL;
g_autoptr(GSocket) socket = NULL;
g_autoptr(GError) error = NULL;
g_autoptr(GTask) task = NULL;
g_autofd int us = -1;
g_autofd int them = -1;
int *fdptr;
g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
task = g_task_new (NULL, cancellable, callback, user_data);
g_task_set_source_tag (task, mks_socketpair_connection_new);
g_task_set_task_data (task, GINT_TO_POINTER (-1), NULL);
if (!create_socketpair (&us, &them, &error) ||
!(socket = g_socket_new_from_fd (us, &error)))
{
g_task_return_error (task, g_steal_pointer (&error));
return;
}
io_stream = g_socket_connection_factory_create_connection (socket);
fdptr = g_memdup2 (&them, sizeof them);
g_task_set_task_data (task, fdptr, fdptr_clear);
us = -1;
them = -1;
g_dbus_connection_new (G_IO_STREAM (io_stream),
NULL,
flags | G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING,
NULL,
cancellable,
mks_socketpair_connection_cb,
g_steal_pointer (&task));
}
/**
* mks_socketpair_connection_new_finish:
* @result: a #GAsyncResult
* @peer_fd: (out): a location for a socketpair file-descriptor
* @error: (out): a location for a #GError, or %NULL
*
* Completes the asynchronous request to create a socketpair()-based
* D-Bus connection.
*
* Returns: (transfer full): a #GDBusConnection and @peer_fd is set
* if successful; otherwise %NULL and @error is set.
*/
GDBusConnection *
mks_socketpair_connection_new_finish (GAsyncResult *result,
int *peer_fd,
GError **error)
{
GDBusConnection *ret;
int *fdptr;
g_return_val_if_fail (G_IS_TASK (result), NULL);
g_return_val_if_fail (peer_fd != NULL, NULL);
fdptr = g_task_get_task_data (G_TASK (result));
if ((ret = g_task_propagate_pointer (G_TASK (result), error)))
*peer_fd = g_steal_fd (fdptr);
return ret;
}