-/*
- * Try to get the socket path from X11 and return NULL if it doesn’t work.
- * As i3-msg is a short-running tool, we don’t bother with cleaning up the
- * connection and leave it up to the operating system on exit.
- *
- */
-static char *socket_path_from_x11() {
- xcb_connection_t *conn;
- int screen;
- if ((conn = xcb_connect(NULL, &screen)) == NULL ||
- xcb_connection_has_error(conn))
- return NULL;
- xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screen);
- xcb_window_t root = root_screen->root;
-
- xcb_intern_atom_cookie_t atom_cookie;
- xcb_intern_atom_reply_t *atom_reply;
-
- atom_cookie = xcb_intern_atom(conn, 0, strlen("I3_SOCKET_PATH"), "I3_SOCKET_PATH");
- atom_reply = xcb_intern_atom_reply(conn, atom_cookie, NULL);
- if (atom_reply == NULL)
- return NULL;
-
- xcb_get_property_cookie_t prop_cookie;
- xcb_get_property_reply_t *prop_reply;
- prop_cookie = xcb_get_property_unchecked(conn, false, root, atom_reply->atom,
- XCB_GET_PROPERTY_TYPE_ANY, 0, PATH_MAX);
- prop_reply = xcb_get_property_reply(conn, prop_cookie, NULL);
- if (prop_reply == NULL || xcb_get_property_value_length(prop_reply) == 0)
- return NULL;
- if (asprintf(&socket_path, "%.*s", xcb_get_property_value_length(prop_reply),
- (char*)xcb_get_property_value(prop_reply)) == -1)
- return NULL;
- return socket_path;
-}
-
-/*
- * Formats a message (payload) of the given size and type and sends it to i3 via
- * the given socket file descriptor.
- *
- */
-static void ipc_send_message(int sockfd, uint32_t message_size,
- uint32_t message_type, uint8_t *payload) {
- int buffer_size = strlen(I3_IPC_MAGIC) + sizeof(uint32_t) + sizeof(uint32_t) + message_size;
- char msg[buffer_size];
- char *walk = msg;
-
- strcpy(walk, I3_IPC_MAGIC);
- walk += strlen(I3_IPC_MAGIC);
- memcpy(walk, &message_size, sizeof(uint32_t));
- walk += sizeof(uint32_t);
- memcpy(walk, &message_type, sizeof(uint32_t));
- walk += sizeof(uint32_t);
- memcpy(walk, payload, message_size);
-
- int sent_bytes = 0;
- int bytes_to_go = buffer_size;
- while (sent_bytes < bytes_to_go) {
- int n = write(sockfd, msg + sent_bytes, bytes_to_go);
- if (n == -1)
- err(EXIT_FAILURE, "write() failed");
-
- sent_bytes += n;
- bytes_to_go -= n;
- }
-}
-
-static void ipc_recv_message(int sockfd, uint32_t message_type,
- uint32_t *reply_length, uint8_t **reply) {
- /* Read the message header first */
- uint32_t to_read = strlen(I3_IPC_MAGIC) + sizeof(uint32_t) + sizeof(uint32_t);
- char msg[to_read];
- char *walk = msg;
-
- uint32_t read_bytes = 0;
- while (read_bytes < to_read) {
- int n = read(sockfd, msg + read_bytes, to_read);
- if (n == -1)
- err(EXIT_FAILURE, "read() failed");
- if (n == 0)
- errx(EXIT_FAILURE, "received EOF instead of reply");
-
- read_bytes += n;
- to_read -= n;
- }
-
- if (memcmp(walk, I3_IPC_MAGIC, strlen(I3_IPC_MAGIC)) != 0)
- errx(EXIT_FAILURE, "invalid magic in reply");
-
- walk += strlen(I3_IPC_MAGIC);
- *reply_length = *((uint32_t*)walk);
- walk += sizeof(uint32_t);
- if (*((uint32_t*)walk) != message_type)
- errx(EXIT_FAILURE, "unexpected reply type (got %d, expected %d)", *((uint32_t*)walk), message_type);
- walk += sizeof(uint32_t);
-
- *reply = malloc(*reply_length);
- if ((*reply) == NULL)
- err(EXIT_FAILURE, "malloc() failed");
-
- to_read = *reply_length;
- read_bytes = 0;
- while (read_bytes < to_read) {
- int n = read(sockfd, *reply + read_bytes, to_read);
- if (n == -1)
- err(EXIT_FAILURE, "read() failed");
-
- read_bytes += n;
- to_read -= n;
- }
-}
-