2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
14 #include <xcb/xcb_aux.h>
19 * Try to get the socket path from X11 and return NULL if it doesn’t work.
21 * The memory for the socket path is dynamically allocated and has to be
22 * free()d by the caller.
25 char *socket_path_from_x11() {
26 xcb_connection_t *conn;
27 xcb_intern_atom_cookie_t atom_cookie;
28 xcb_intern_atom_reply_t *atom_reply;
32 if ((conn = xcb_connect(NULL, &screen)) == NULL ||
33 xcb_connection_has_error(conn))
36 atom_cookie = xcb_intern_atom(conn, 0, strlen("I3_SOCKET_PATH"), "I3_SOCKET_PATH");
38 xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screen);
39 xcb_window_t root = root_screen->root;
41 atom_reply = xcb_intern_atom_reply(conn, atom_cookie, NULL);
42 if (atom_reply == NULL)
45 xcb_get_property_cookie_t prop_cookie;
46 xcb_get_property_reply_t *prop_reply;
47 prop_cookie = xcb_get_property_unchecked(conn, false, root, atom_reply->atom,
48 XCB_GET_PROPERTY_TYPE_ANY, 0, PATH_MAX);
49 prop_reply = xcb_get_property_reply(conn, prop_cookie, NULL);
50 if (prop_reply == NULL || xcb_get_property_value_length(prop_reply) == 0)
52 if (asprintf(&socket_path, "%.*s", xcb_get_property_value_length(prop_reply),
53 (char*)xcb_get_property_value(prop_reply)) == -1)