| /* |
| * Copyright © 2008 Kristian Høgsberg |
| * |
| * Permission to use, copy, modify, distribute, and sell this software and its |
| * documentation for any purpose is hereby granted without fee, provided that |
| * the above copyright notice appear in all copies and that both that copyright |
| * notice and this permission notice appear in supporting documentation, and |
| * that the name of the copyright holders not be used in advertising or |
| * publicity pertaining to distribution of the software without specific, |
| * written prior permission. The copyright holders make no representations |
| * about the suitability of this software for any purpose. It is provided "as |
| * is" without express or implied warranty. |
| * |
| * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| * OF THIS SOFTWARE. |
| */ |
| |
| #define _GNU_SOURCE |
| |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <sys/socket.h> |
| #include <sys/un.h> |
| #include <dlfcn.h> |
| #include <assert.h> |
| #include <sys/time.h> |
| #include <fcntl.h> |
| #include <sys/file.h> |
| #include <sys/stat.h> |
| #include <ffi.h> |
| |
| #include "wayland-private.h" |
| #include "wayland-server.h" |
| #include "wayland-server-protocol.h" |
| #include "wayland-os.h" |
| |
| /* This is the size of the char array in struct sock_addr_un. |
| No Wayland socket can be created with a path longer than this, |
| including the null terminator. */ |
| #ifndef UNIX_PATH_MAX |
| #define UNIX_PATH_MAX 108 |
| #endif |
| |
| #define LOCK_SUFFIX ".lock" |
| #define LOCK_SUFFIXLEN 5 |
| |
| struct wl_socket { |
| int fd; |
| int fd_lock; |
| struct sockaddr_un addr; |
| char lock_addr[UNIX_PATH_MAX + LOCK_SUFFIXLEN]; |
| struct wl_list link; |
| struct wl_event_source *source; |
| }; |
| |
| struct wl_client { |
| struct wl_connection *connection; |
| struct wl_event_source *source; |
| struct wl_display *display; |
| struct wl_resource *display_resource; |
| uint32_t id_count; |
| uint32_t mask; |
| struct wl_list link; |
| struct wl_map objects; |
| struct wl_signal destroy_signal; |
| struct ucred ucred; |
| int error; |
| }; |
| |
| struct wl_display { |
| struct wl_event_loop *loop; |
| int run; |
| |
| uint32_t id; |
| uint32_t serial; |
| |
| struct wl_list registry_resource_list; |
| struct wl_list global_list; |
| struct wl_list socket_list; |
| struct wl_list client_list; |
| |
| struct wl_signal destroy_signal; |
| |
| struct wl_array additional_shm_formats; |
| }; |
| |
| struct wl_global { |
| struct wl_display *display; |
| const struct wl_interface *interface; |
| uint32_t name; |
| uint32_t version; |
| void *data; |
| wl_global_bind_func_t bind; |
| struct wl_list link; |
| }; |
| |
| struct wl_resource { |
| struct wl_object object; |
| wl_resource_destroy_func_t destroy; |
| struct wl_list link; |
| struct wl_signal destroy_signal; |
| struct wl_client *client; |
| void *data; |
| int version; |
| wl_dispatcher_func_t dispatcher; |
| }; |
| |
| static int debug_server = 0; |
| |
| WL_EXPORT void |
| wl_resource_post_event_array(struct wl_resource *resource, uint32_t opcode, |
| union wl_argument *args) |
| { |
| struct wl_closure *closure; |
| struct wl_object *object = &resource->object; |
| |
| closure = wl_closure_marshal(object, opcode, args, |
| &object->interface->events[opcode]); |
| |
| if (closure == NULL) { |
| resource->client->error = 1; |
| return; |
| } |
| |
| if (wl_closure_send(closure, resource->client->connection)) |
| resource->client->error = 1; |
| |
| if (debug_server) |
| wl_closure_print(closure, object, true); |
| |
| wl_closure_destroy(closure); |
| } |
| |
| WL_EXPORT void |
| wl_resource_post_event(struct wl_resource *resource, uint32_t opcode, ...) |
| { |
| union wl_argument args[WL_CLOSURE_MAX_ARGS]; |
| struct wl_object *object = &resource->object; |
| va_list ap; |
| |
| va_start(ap, opcode); |
| wl_argument_from_va_list(object->interface->events[opcode].signature, |
| args, WL_CLOSURE_MAX_ARGS, ap); |
| va_end(ap); |
| |
| wl_resource_post_event_array(resource, opcode, args); |
| } |
| |
| |
| WL_EXPORT void |
| wl_resource_queue_event_array(struct wl_resource *resource, uint32_t opcode, |
| union wl_argument *args) |
| { |
| struct wl_closure *closure; |
| struct wl_object *object = &resource->object; |
| |
| closure = wl_closure_marshal(object, opcode, args, |
| &object->interface->events[opcode]); |
| |
| if (closure == NULL) { |
| resource->client->error = 1; |
| return; |
| } |
| |
| if (wl_closure_queue(closure, resource->client->connection)) |
| resource->client->error = 1; |
| |
| if (debug_server) |
| wl_closure_print(closure, object, true); |
| |
| wl_closure_destroy(closure); |
| } |
| |
| WL_EXPORT void |
| wl_resource_queue_event(struct wl_resource *resource, uint32_t opcode, ...) |
| { |
| union wl_argument args[WL_CLOSURE_MAX_ARGS]; |
| struct wl_object *object = &resource->object; |
| va_list ap; |
| |
| va_start(ap, opcode); |
| wl_argument_from_va_list(object->interface->events[opcode].signature, |
| args, WL_CLOSURE_MAX_ARGS, ap); |
| va_end(ap); |
| |
| wl_resource_queue_event_array(resource, opcode, args); |
| } |
| |
| WL_EXPORT void |
| wl_resource_post_error(struct wl_resource *resource, |
| uint32_t code, const char *msg, ...) |
| { |
| struct wl_client *client = resource->client; |
| char buffer[128]; |
| va_list ap; |
| |
| va_start(ap, msg); |
| vsnprintf(buffer, sizeof buffer, msg, ap); |
| va_end(ap); |
| |
| client->error = 1; |
| |
| /* |
| * When a client aborts, its resources are destroyed in id order, |
| * which means the display resource is destroyed first. If destruction |
| * of any later resources results in a protocol error, we end up here |
| * with a NULL display_resource. Do not try to send errors to an |
| * already dead client. |
| */ |
| if (!client->display_resource) |
| return; |
| |
| wl_resource_post_event(client->display_resource, |
| WL_DISPLAY_ERROR, resource, code, buffer); |
| } |
| |
| static int |
| wl_client_connection_data(int fd, uint32_t mask, void *data) |
| { |
| struct wl_client *client = data; |
| struct wl_connection *connection = client->connection; |
| struct wl_resource *resource; |
| struct wl_object *object; |
| struct wl_closure *closure; |
| const struct wl_message *message; |
| uint32_t p[2]; |
| uint32_t resource_flags; |
| int opcode, size; |
| int len; |
| |
| if (mask & (WL_EVENT_ERROR | WL_EVENT_HANGUP)) { |
| wl_client_destroy(client); |
| return 1; |
| } |
| |
| if (mask & WL_EVENT_WRITABLE) { |
| len = wl_connection_flush(connection); |
| if (len < 0 && errno != EAGAIN) { |
| wl_client_destroy(client); |
| return 1; |
| } else if (len >= 0) { |
| wl_event_source_fd_update(client->source, |
| WL_EVENT_READABLE); |
| } |
| } |
| |
| len = 0; |
| if (mask & WL_EVENT_READABLE) { |
| len = wl_connection_read(connection); |
| if (len < 0 && errno != EAGAIN) { |
| wl_client_destroy(client); |
| return 1; |
| } |
| } |
| |
| while ((size_t) len >= sizeof p) { |
| wl_connection_copy(connection, p, sizeof p); |
| opcode = p[1] & 0xffff; |
| size = p[1] >> 16; |
| if (len < size) |
| break; |
| |
| resource = wl_map_lookup(&client->objects, p[0]); |
| resource_flags = wl_map_lookup_flags(&client->objects, p[0]); |
| if (resource == NULL) { |
| wl_resource_post_error(client->display_resource, |
| WL_DISPLAY_ERROR_INVALID_OBJECT, |
| "invalid object %u", p[0]); |
| break; |
| } |
| |
| object = &resource->object; |
| if (opcode >= object->interface->method_count) { |
| wl_resource_post_error(client->display_resource, |
| WL_DISPLAY_ERROR_INVALID_METHOD, |
| "invalid method %d, object %s@%u", |
| opcode, |
| object->interface->name, |
| object->id); |
| break; |
| } |
| |
| message = &object->interface->methods[opcode]; |
| if (!(resource_flags & WL_MAP_ENTRY_LEGACY) && |
| resource->version > 0 && |
| resource->version < wl_message_get_since(message)) { |
| wl_resource_post_error(client->display_resource, |
| WL_DISPLAY_ERROR_INVALID_METHOD, |
| "invalid method %d, object %s@%u", |
| opcode, |
| object->interface->name, |
| object->id); |
| break; |
| } |
| |
| |
| closure = wl_connection_demarshal(client->connection, size, |
| &client->objects, message); |
| len -= size; |
| |
| if (closure == NULL && errno == ENOMEM) { |
| wl_resource_post_no_memory(resource); |
| break; |
| } else if (closure == NULL || |
| wl_closure_lookup_objects(closure, &client->objects) < 0) { |
| wl_resource_post_error(client->display_resource, |
| WL_DISPLAY_ERROR_INVALID_METHOD, |
| "invalid arguments for %s@%u.%s", |
| object->interface->name, |
| object->id, |
| message->name); |
| wl_closure_destroy(closure); |
| break; |
| } |
| |
| if (debug_server) |
| wl_closure_print(closure, object, false); |
| |
| if ((resource_flags & WL_MAP_ENTRY_LEGACY) || |
| resource->dispatcher == NULL) { |
| wl_closure_invoke(closure, WL_CLOSURE_INVOKE_SERVER, |
| object, opcode, client); |
| } else { |
| wl_closure_dispatch(closure, resource->dispatcher, |
| object, opcode); |
| } |
| |
| wl_closure_destroy(closure); |
| |
| if (client->error) |
| break; |
| } |
| |
| if (client->error) |
| wl_client_destroy(client); |
| |
| return 1; |
| } |
| |
| /** Flush pending events to the client |
| * |
| * \param client The client object |
| * |
| * Events sent to clients are queued in a buffer and written to the |
| * socket later - typically when the compositor has handled all |
| * requests and goes back to block in the event loop. This function |
| * flushes all queued up events for a client immediately. |
| * |
| * \memberof wl_client |
| */ |
| WL_EXPORT void |
| wl_client_flush(struct wl_client *client) |
| { |
| wl_connection_flush(client->connection); |
| } |
| |
| /** Get the display object for the given client |
| * |
| * \param client The client object |
| * \return The display object the client is associated with. |
| * |
| * \memberof wl_client |
| */ |
| WL_EXPORT struct wl_display * |
| wl_client_get_display(struct wl_client *client) |
| { |
| return client->display; |
| } |
| |
| static void |
| bind_display(struct wl_client *client, |
| void *data, uint32_t version, uint32_t id); |
| |
| /** Create a client for the given file descriptor |
| * |
| * \param display The display object |
| * \param fd The file descriptor for the socket to the client |
| * \return The new client object or NULL on failure. |
| * |
| * Given a file descriptor corresponding to one end of a socket, this |
| * function will create a wl_client struct and add the new client to |
| * the compositors client list. At that point, the client is |
| * initialized and ready to run, as if the client had connected to the |
| * servers listening socket. When the client eventually sends |
| * requests to the compositor, the wl_client argument to the request |
| * handler will be the wl_client returned from this function. |
| * |
| * The other end of the socket can be passed to |
| * wl_display_connect_to_fd() on the client side or used with the |
| * WAYLAND_SOCKET environment variable on the client side. |
| * |
| * On failure this function sets errno accordingly and returns NULL. |
| * |
| * \memberof wl_display |
| */ |
| WL_EXPORT struct wl_client * |
| wl_client_create(struct wl_display *display, int fd) |
| { |
| struct wl_client *client; |
| socklen_t len; |
| |
| client = malloc(sizeof *client); |
| if (client == NULL) |
| return NULL; |
| |
| memset(client, 0, sizeof *client); |
| client->display = display; |
| client->source = wl_event_loop_add_fd(display->loop, fd, |
| WL_EVENT_READABLE, |
| wl_client_connection_data, client); |
| |
| if (!client->source) |
| goto err_client; |
| |
| len = sizeof client->ucred; |
| if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, |
| &client->ucred, &len) < 0) |
| goto err_source; |
| |
| client->connection = wl_connection_create(fd); |
| if (client->connection == NULL) |
| goto err_source; |
| |
| wl_map_init(&client->objects, WL_MAP_SERVER_SIDE); |
| |
| if (wl_map_insert_at(&client->objects, 0, 0, NULL) < 0) |
| goto err_map; |
| |
| wl_signal_init(&client->destroy_signal); |
| bind_display(client, display, 1, 1); |
| |
| if (!client->display_resource) |
| goto err_map; |
| |
| wl_list_insert(display->client_list.prev, &client->link); |
| |
| return client; |
| |
| err_map: |
| wl_map_release(&client->objects); |
| wl_connection_destroy(client->connection); |
| err_source: |
| wl_event_source_remove(client->source); |
| err_client: |
| free(client); |
| return NULL; |
| } |
| |
| /** Return Unix credentials for the client |
| * |
| * \param client The display object |
| * \param pid Returns the process ID |
| * \param uid Returns the user ID |
| * \param gid Returns the group ID |
| * |
| * This function returns the process ID, the user ID and the group ID |
| * for the given client. The credentials come from getsockopt() with |
| * SO_PEERCRED, on the client socket fd. All the pointers can be |
| * NULL, if the caller is not interested in a particular ID. |
| * |
| * Be aware that for clients that a compositor forks and execs and |
| * then connects using socketpair(), this function will return the |
| * credentials for the compositor. The credentials for the socketpair |
| * are set at creation time in the compositor. |
| * |
| * \memberof wl_client |
| */ |
| WL_EXPORT void |
| wl_client_get_credentials(struct wl_client *client, |
| pid_t *pid, uid_t *uid, gid_t *gid) |
| { |
| if (pid) |
| *pid = client->ucred.pid; |
| if (uid) |
| *uid = client->ucred.uid; |
| if (gid) |
| *gid = client->ucred.gid; |
| } |
| |
| /** Look up an object in the client name space |
| * |
| * \param client The client object |
| * \param id The object id |
| * \return The object or NULL if there is not object for the given ID |
| * |
| * This looks up an object in the client object name space by its |
| * object ID. |
| * |
| * \memberof wl_client |
| */ |
| WL_EXPORT struct wl_resource * |
| wl_client_get_object(struct wl_client *client, uint32_t id) |
| { |
| return wl_map_lookup(&client->objects, id); |
| } |
| |
| WL_EXPORT void |
| wl_client_post_no_memory(struct wl_client *client) |
| { |
| wl_resource_post_error(client->display_resource, |
| WL_DISPLAY_ERROR_NO_MEMORY, "no memory"); |
| } |
| |
| WL_EXPORT void |
| wl_resource_post_no_memory(struct wl_resource *resource) |
| { |
| wl_resource_post_error(resource->client->display_resource, |
| WL_DISPLAY_ERROR_NO_MEMORY, "no memory"); |
| } |
| |
| static void |
| destroy_resource(void *element, void *data) |
| { |
| struct wl_resource *resource = element; |
| struct wl_client *client = resource->client; |
| uint32_t flags; |
| |
| wl_signal_emit(&resource->destroy_signal, resource); |
| |
| flags = wl_map_lookup_flags(&client->objects, resource->object.id); |
| if (resource->destroy) |
| resource->destroy(resource); |
| |
| if (!(flags & WL_MAP_ENTRY_LEGACY)) |
| free(resource); |
| } |
| |
| WL_EXPORT void |
| wl_resource_destroy(struct wl_resource *resource) |
| { |
| struct wl_client *client = resource->client; |
| uint32_t id; |
| |
| id = resource->object.id; |
| destroy_resource(resource, NULL); |
| |
| if (id < WL_SERVER_ID_START) { |
| if (client->display_resource) { |
| wl_resource_queue_event(client->display_resource, |
| WL_DISPLAY_DELETE_ID, id); |
| } |
| wl_map_insert_at(&client->objects, 0, id, NULL); |
| } else { |
| wl_map_remove(&client->objects, id); |
| } |
| } |
| |
| WL_EXPORT uint32_t |
| wl_resource_get_id(struct wl_resource *resource) |
| { |
| return resource->object.id; |
| } |
| |
| WL_EXPORT struct wl_list * |
| wl_resource_get_link(struct wl_resource *resource) |
| { |
| return &resource->link; |
| } |
| |
| WL_EXPORT struct wl_resource * |
| wl_resource_from_link(struct wl_list *link) |
| { |
| struct wl_resource *resource; |
| |
| return wl_container_of(link, resource, link); |
| } |
| |
| WL_EXPORT struct wl_resource * |
| wl_resource_find_for_client(struct wl_list *list, struct wl_client *client) |
| { |
| struct wl_resource *resource; |
| |
| if (client == NULL) |
| return NULL; |
| |
| wl_list_for_each(resource, list, link) { |
| if (resource->client == client) |
| return resource; |
| } |
| |
| return NULL; |
| } |
| |
| WL_EXPORT struct wl_client * |
| wl_resource_get_client(struct wl_resource *resource) |
| { |
| return resource->client; |
| } |
| |
| WL_EXPORT void |
| wl_resource_set_user_data(struct wl_resource *resource, void *data) |
| { |
| resource->data = data; |
| } |
| |
| WL_EXPORT void * |
| wl_resource_get_user_data(struct wl_resource *resource) |
| { |
| return resource->data; |
| } |
| |
| WL_EXPORT int |
| wl_resource_get_version(struct wl_resource *resource) |
| { |
| return resource->version; |
| } |
| |
| WL_EXPORT void |
| wl_resource_set_destructor(struct wl_resource *resource, |
| wl_resource_destroy_func_t destroy) |
| { |
| resource->destroy = destroy; |
| } |
| |
| WL_EXPORT int |
| wl_resource_instance_of(struct wl_resource *resource, |
| const struct wl_interface *interface, |
| const void *implementation) |
| { |
| return wl_interface_equal(resource->object.interface, interface) && |
| resource->object.implementation == implementation; |
| } |
| |
| WL_EXPORT void |
| wl_resource_add_destroy_listener(struct wl_resource *resource, |
| struct wl_listener * listener) |
| { |
| wl_signal_add(&resource->destroy_signal, listener); |
| } |
| |
| WL_EXPORT struct wl_listener * |
| wl_resource_get_destroy_listener(struct wl_resource *resource, |
| wl_notify_func_t notify) |
| { |
| return wl_signal_get(&resource->destroy_signal, notify); |
| } |
| |
| WL_EXPORT void |
| wl_client_add_destroy_listener(struct wl_client *client, |
| struct wl_listener *listener) |
| { |
| wl_signal_add(&client->destroy_signal, listener); |
| } |
| |
| WL_EXPORT struct wl_listener * |
| wl_client_get_destroy_listener(struct wl_client *client, |
| wl_notify_func_t notify) |
| { |
| return wl_signal_get(&client->destroy_signal, notify); |
| } |
| |
| WL_EXPORT void |
| wl_client_destroy(struct wl_client *client) |
| { |
| uint32_t serial = 0; |
| |
| wl_signal_emit(&client->destroy_signal, client); |
| |
| wl_client_flush(client); |
| wl_map_for_each(&client->objects, destroy_resource, &serial); |
| wl_map_release(&client->objects); |
| wl_event_source_remove(client->source); |
| wl_connection_destroy(client->connection); |
| wl_list_remove(&client->link); |
| free(client); |
| } |
| |
| static void |
| registry_bind(struct wl_client *client, |
| struct wl_resource *resource, uint32_t name, |
| const char *interface, uint32_t version, uint32_t id) |
| { |
| struct wl_global *global; |
| struct wl_display *display = resource->data; |
| |
| wl_list_for_each(global, &display->global_list, link) |
| if (global->name == name) |
| break; |
| |
| if (&global->link == &display->global_list) |
| wl_resource_post_error(resource, |
| WL_DISPLAY_ERROR_INVALID_OBJECT, |
| "invalid global %s (%d)", interface, name); |
| else if (global->version < version) |
| wl_resource_post_error(resource, |
| WL_DISPLAY_ERROR_INVALID_OBJECT, |
| "invalid version for global %s (%d): have %d, wanted %d", |
| interface, name, global->version, version); |
| else |
| global->bind(client, global->data, version, id); |
| } |
| |
| static const struct wl_registry_interface registry_interface = { |
| registry_bind |
| }; |
| |
| static void |
| display_sync(struct wl_client *client, |
| struct wl_resource *resource, uint32_t id) |
| { |
| struct wl_resource *callback; |
| uint32_t serial; |
| |
| callback = wl_resource_create(client, &wl_callback_interface, 1, id); |
| if (callback == NULL) { |
| wl_client_post_no_memory(client); |
| return; |
| } |
| |
| serial = wl_display_get_serial(client->display); |
| wl_callback_send_done(callback, serial); |
| wl_resource_destroy(callback); |
| } |
| |
| static void |
| unbind_resource(struct wl_resource *resource) |
| { |
| wl_list_remove(&resource->link); |
| } |
| |
| static void |
| display_get_registry(struct wl_client *client, |
| struct wl_resource *resource, uint32_t id) |
| { |
| struct wl_display *display = resource->data; |
| struct wl_resource *registry_resource; |
| struct wl_global *global; |
| |
| registry_resource = |
| wl_resource_create(client, &wl_registry_interface, 1, id); |
| if (registry_resource == NULL) { |
| wl_client_post_no_memory(client); |
| return; |
| } |
| |
| wl_resource_set_implementation(registry_resource, |
| ®istry_interface, |
| display, unbind_resource); |
| |
| wl_list_insert(&display->registry_resource_list, |
| ®istry_resource->link); |
| |
| wl_list_for_each(global, &display->global_list, link) |
| wl_resource_post_event(registry_resource, |
| WL_REGISTRY_GLOBAL, |
| global->name, |
| global->interface->name, |
| global->version); |
| } |
| |
| static const struct wl_display_interface display_interface = { |
| display_sync, |
| display_get_registry |
| }; |
| |
| static void |
| destroy_client_display_resource(struct wl_resource *resource) |
| { |
| resource->client->display_resource = NULL; |
| } |
| |
| static void |
| bind_display(struct wl_client *client, |
| void *data, uint32_t version, uint32_t id) |
| { |
| struct wl_display *display = data; |
| |
| client->display_resource = |
| wl_resource_create(client, &wl_display_interface, 1, id); |
| if (client->display_resource == NULL) { |
| wl_client_post_no_memory(client); |
| return; |
| } |
| |
| wl_resource_set_implementation(client->display_resource, |
| &display_interface, display, |
| destroy_client_display_resource); |
| } |
| |
| /** Create Wayland display object. |
| * |
| * \param None |
| * \return The Wayland display object. Null if failed to create |
| * |
| * This creates the wl_display object. |
| * |
| * \memberof wl_display |
| */ |
| WL_EXPORT struct wl_display * |
| wl_display_create(void) |
| { |
| struct wl_display *display; |
| const char *debug; |
| |
| debug = getenv("WAYLAND_DEBUG"); |
| if (debug && (strstr(debug, "server") || strstr(debug, "1"))) |
| debug_server = 1; |
| |
| display = malloc(sizeof *display); |
| if (display == NULL) |
| return NULL; |
| |
| display->loop = wl_event_loop_create(); |
| if (display->loop == NULL) { |
| free(display); |
| return NULL; |
| } |
| |
| wl_list_init(&display->global_list); |
| wl_list_init(&display->socket_list); |
| wl_list_init(&display->client_list); |
| wl_list_init(&display->registry_resource_list); |
| |
| wl_signal_init(&display->destroy_signal); |
| |
| display->id = 1; |
| display->serial = 0; |
| |
| wl_array_init(&display->additional_shm_formats); |
| |
| if (!wl_global_create(display, &wl_display_interface, 1, |
| display, bind_display)) { |
| wl_event_loop_destroy(display->loop); |
| free(display); |
| return NULL; |
| } |
| |
| return display; |
| } |
| |
| WL_EXPORT void |
| wl_display_destroy(struct wl_display *display) |
| { |
| struct wl_socket *s, *next; |
| struct wl_global *global, *gnext; |
| |
| wl_signal_emit(&display->destroy_signal, display); |
| |
| wl_list_for_each_safe(s, next, &display->socket_list, link) { |
| wl_event_source_remove(s->source); |
| unlink(s->addr.sun_path); |
| close(s->fd); |
| unlink(s->lock_addr); |
| close(s->fd_lock); |
| free(s); |
| } |
| wl_event_loop_destroy(display->loop); |
| |
| wl_list_for_each_safe(global, gnext, &display->global_list, link) |
| free(global); |
| |
| wl_array_release(&display->additional_shm_formats); |
| |
| free(display); |
| } |
| |
| WL_EXPORT struct wl_global * |
| wl_global_create(struct wl_display *display, |
| const struct wl_interface *interface, int version, |
| void *data, wl_global_bind_func_t bind) |
| { |
| struct wl_global *global; |
| struct wl_resource *resource; |
| |
| if (interface->version < version) { |
| wl_log("wl_global_create: implemented version higher " |
| "than interface version%m\n"); |
| return NULL; |
| } |
| |
| global = malloc(sizeof *global); |
| if (global == NULL) |
| return NULL; |
| |
| global->display = display; |
| global->name = display->id++; |
| global->interface = interface; |
| global->version = version; |
| global->data = data; |
| global->bind = bind; |
| wl_list_insert(display->global_list.prev, &global->link); |
| |
| wl_list_for_each(resource, &display->registry_resource_list, link) |
| wl_resource_post_event(resource, |
| WL_REGISTRY_GLOBAL, |
| global->name, |
| global->interface->name, |
| global->version); |
| |
| return global; |
| } |
| |
| WL_EXPORT void |
| wl_global_destroy(struct wl_global *global) |
| { |
| struct wl_display *display = global->display; |
| struct wl_resource *resource; |
| |
| wl_list_for_each(resource, &display->registry_resource_list, link) |
| wl_resource_post_event(resource, WL_REGISTRY_GLOBAL_REMOVE, |
| global->name); |
| wl_list_remove(&global->link); |
| free(global); |
| } |
| |
| /** Get the current serial number |
| * |
| * \param display The display object |
| * |
| * This function returns the most recent serial number, but does not |
| * increment it. |
| * |
| * \memberof wl_display |
| */ |
| WL_EXPORT uint32_t |
| wl_display_get_serial(struct wl_display *display) |
| { |
| return display->serial; |
| } |
| |
| /** Get the next serial number |
| * |
| * \param display The display object |
| * |
| * This function increments the display serial number and returns the |
| * new value. |
| * |
| * \memberof wl_display |
| */ |
| WL_EXPORT uint32_t |
| wl_display_next_serial(struct wl_display *display) |
| { |
| display->serial++; |
| |
| return display->serial; |
| } |
| |
| WL_EXPORT struct wl_event_loop * |
| wl_display_get_event_loop(struct wl_display *display) |
| { |
| return display->loop; |
| } |
| |
| WL_EXPORT void |
| wl_display_terminate(struct wl_display *display) |
| { |
| display->run = 0; |
| } |
| |
| WL_EXPORT void |
| wl_display_run(struct wl_display *display) |
| { |
| display->run = 1; |
| |
| while (display->run) { |
| wl_display_flush_clients(display); |
| wl_event_loop_dispatch(display->loop, -1); |
| } |
| } |
| |
| WL_EXPORT void |
| wl_display_flush_clients(struct wl_display *display) |
| { |
| struct wl_client *client, *next; |
| int ret; |
| |
| wl_list_for_each_safe(client, next, &display->client_list, link) { |
| ret = wl_connection_flush(client->connection); |
| if (ret < 0 && errno == EAGAIN) { |
| wl_event_source_fd_update(client->source, |
| WL_EVENT_WRITABLE | |
| WL_EVENT_READABLE); |
| } else if (ret < 0) { |
| wl_client_destroy(client); |
| } |
| } |
| } |
| |
| static int |
| socket_data(int fd, uint32_t mask, void *data) |
| { |
| struct wl_display *display = data; |
| struct sockaddr_un name; |
| socklen_t length; |
| int client_fd; |
| |
| length = sizeof name; |
| client_fd = wl_os_accept_cloexec(fd, (struct sockaddr *) &name, |
| &length); |
| if (client_fd < 0) |
| wl_log("failed to accept: %m\n"); |
| else |
| if (!wl_client_create(display, client_fd)) |
| close(client_fd); |
| |
| return 1; |
| } |
| |
| static int |
| get_socket_lock(struct wl_socket *socket) |
| { |
| struct stat socket_stat; |
| int fd_lock; |
| |
| snprintf(socket->lock_addr, sizeof socket->lock_addr, |
| "%s%s", socket->addr.sun_path, LOCK_SUFFIX); |
| |
| fd_lock = open(socket->lock_addr, O_CREAT | O_CLOEXEC, |
| (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP)); |
| |
| if (fd_lock < 0) { |
| wl_log("unable to open lockfile %s check permissions\n", |
| socket->lock_addr); |
| return -1; |
| } |
| |
| if (flock(fd_lock, LOCK_EX | LOCK_NB) < 0) { |
| wl_log("unable to lock lockfile %s, maybe another compositor is running\n", |
| socket->lock_addr); |
| close(fd_lock); |
| return -1; |
| } |
| |
| if (stat(socket->addr.sun_path, &socket_stat) < 0 ) { |
| if (errno != ENOENT) { |
| wl_log("did not manage to stat file %s\n", |
| socket->addr.sun_path); |
| close(fd_lock); |
| return -1; |
| } |
| } else if (socket_stat.st_mode & S_IWUSR || |
| socket_stat.st_mode & S_IWGRP) { |
| unlink(socket->addr.sun_path); |
| } |
| |
| return fd_lock; |
| } |
| |
| WL_EXPORT int |
| wl_display_add_socket(struct wl_display *display, const char *name) |
| { |
| struct wl_socket *s; |
| socklen_t size; |
| int name_size; |
| const char *runtime_dir; |
| |
| runtime_dir = getenv("XDG_RUNTIME_DIR"); |
| if (!runtime_dir) { |
| wl_log("error: XDG_RUNTIME_DIR not set in the environment\n"); |
| |
| /* to prevent programs reporting |
| * "failed to add socket: Success" */ |
| errno = ENOENT; |
| return -1; |
| } |
| |
| s = malloc(sizeof *s); |
| if (s == NULL) |
| return -1; |
| |
| s->fd = wl_os_socket_cloexec(PF_LOCAL, SOCK_STREAM, 0); |
| if (s->fd < 0) { |
| free(s); |
| return -1; |
| } |
| |
| if (name == NULL) |
| name = getenv("WAYLAND_DISPLAY"); |
| if (name == NULL) |
| name = "wayland-0"; |
| |
| memset(&s->addr, 0, sizeof s->addr); |
| s->addr.sun_family = AF_LOCAL; |
| name_size = snprintf(s->addr.sun_path, sizeof s->addr.sun_path, |
| "%s/%s", runtime_dir, name) + 1; |
| |
| assert(name_size > 0); |
| if (name_size > (int)sizeof s->addr.sun_path) { |
| wl_log("error: socket path \"%s/%s\" plus null terminator" |
| " exceeds 108 bytes\n", runtime_dir, name); |
| close(s->fd); |
| free(s); |
| /* to prevent programs reporting |
| * "failed to add socket: Success" */ |
| errno = ENAMETOOLONG; |
| return -1; |
| }; |
| |
| s->fd_lock = get_socket_lock(s); |
| if (s->fd_lock < 0) { |
| close(s->fd); |
| free(s); |
| return -1; |
| } |
| |
| size = offsetof (struct sockaddr_un, sun_path) + name_size; |
| if (bind(s->fd, (struct sockaddr *) &s->addr, size) < 0) { |
| wl_log("bind() failed with error: %m\n"); |
| close(s->fd); |
| unlink(s->lock_addr); |
| close(s->fd_lock); |
| free(s); |
| return -1; |
| } |
| |
| if (listen(s->fd, 1) < 0) { |
| wl_log("listen() failed with error: %m\n"); |
| unlink(s->addr.sun_path); |
| close(s->fd); |
| unlink(s->lock_addr); |
| close(s->fd_lock); |
| free(s); |
| return -1; |
| } |
| |
| s->source = wl_event_loop_add_fd(display->loop, s->fd, |
| WL_EVENT_READABLE, |
| socket_data, display); |
| if (s->source == NULL) { |
| unlink(s->addr.sun_path); |
| close(s->fd); |
| unlink(s->lock_addr); |
| close(s->fd_lock); |
| free(s); |
| return -1; |
| } |
| wl_list_insert(display->socket_list.prev, &s->link); |
| |
| return 0; |
| } |
| |
| WL_EXPORT void |
| wl_display_add_destroy_listener(struct wl_display *display, |
| struct wl_listener *listener) |
| { |
| wl_signal_add(&display->destroy_signal, listener); |
| } |
| |
| WL_EXPORT struct wl_listener * |
| wl_display_get_destroy_listener(struct wl_display *display, |
| wl_notify_func_t notify) |
| { |
| return wl_signal_get(&display->destroy_signal, notify); |
| } |
| |
| WL_EXPORT void |
| wl_resource_set_implementation(struct wl_resource *resource, |
| const void *implementation, |
| void *data, wl_resource_destroy_func_t destroy) |
| { |
| resource->object.implementation = implementation; |
| resource->data = data; |
| resource->destroy = destroy; |
| resource->dispatcher = NULL; |
| } |
| |
| WL_EXPORT void |
| wl_resource_set_dispatcher(struct wl_resource *resource, |
| wl_dispatcher_func_t dispatcher, |
| const void *implementation, |
| void *data, wl_resource_destroy_func_t destroy) |
| { |
| resource->dispatcher = dispatcher; |
| resource->object.implementation = implementation; |
| resource->data = data; |
| resource->destroy = destroy; |
| } |
| |
| WL_EXPORT struct wl_resource * |
| wl_resource_create(struct wl_client *client, |
| const struct wl_interface *interface, |
| int version, uint32_t id) |
| { |
| struct wl_resource *resource; |
| |
| resource = malloc(sizeof *resource); |
| if (resource == NULL) |
| return NULL; |
| |
| if (id == 0) |
| id = wl_map_insert_new(&client->objects, 0, NULL); |
| |
| resource->object.id = id; |
| resource->object.interface = interface; |
| resource->object.implementation = NULL; |
| |
| wl_signal_init(&resource->destroy_signal); |
| |
| resource->destroy = NULL; |
| resource->client = client; |
| resource->data = NULL; |
| resource->version = version; |
| resource->dispatcher = NULL; |
| |
| if (wl_map_insert_at(&client->objects, 0, resource->object.id, resource) < 0) { |
| wl_resource_post_error(client->display_resource, |
| WL_DISPLAY_ERROR_INVALID_OBJECT, |
| "invalid new id %d", |
| resource->object.id); |
| free(resource); |
| return NULL; |
| } |
| |
| return resource; |
| } |
| |
| WL_EXPORT void |
| wl_log_set_handler_server(wl_log_func_t handler) |
| { |
| wl_log_handler = handler; |
| } |
| |
| /* Deprecated functions below. */ |
| |
| uint32_t |
| wl_client_add_resource(struct wl_client *client, |
| struct wl_resource *resource) WL_DEPRECATED; |
| |
| WL_EXPORT uint32_t |
| wl_client_add_resource(struct wl_client *client, |
| struct wl_resource *resource) |
| { |
| if (resource->object.id == 0) { |
| resource->object.id = |
| wl_map_insert_new(&client->objects, |
| WL_MAP_ENTRY_LEGACY, resource); |
| } else if (wl_map_insert_at(&client->objects, WL_MAP_ENTRY_LEGACY, |
| resource->object.id, resource) < 0) { |
| wl_resource_post_error(client->display_resource, |
| WL_DISPLAY_ERROR_INVALID_OBJECT, |
| "invalid new id %d", |
| resource->object.id); |
| return 0; |
| } |
| |
| resource->client = client; |
| wl_signal_init(&resource->destroy_signal); |
| |
| return resource->object.id; |
| } |
| |
| struct wl_resource * |
| wl_client_add_object(struct wl_client *client, |
| const struct wl_interface *interface, |
| const void *implementation, |
| uint32_t id, void *data) WL_DEPRECATED; |
| |
| WL_EXPORT struct wl_resource * |
| wl_client_add_object(struct wl_client *client, |
| const struct wl_interface *interface, |
| const void *implementation, uint32_t id, void *data) |
| { |
| struct wl_resource *resource; |
| |
| resource = wl_resource_create(client, interface, -1, id); |
| if (resource == NULL) |
| wl_client_post_no_memory(client); |
| else |
| wl_resource_set_implementation(resource, |
| implementation, data, NULL); |
| |
| return resource; |
| } |
| |
| struct wl_resource * |
| wl_client_new_object(struct wl_client *client, |
| const struct wl_interface *interface, |
| const void *implementation, void *data) WL_DEPRECATED; |
| |
| WL_EXPORT struct wl_resource * |
| wl_client_new_object(struct wl_client *client, |
| const struct wl_interface *interface, |
| const void *implementation, void *data) |
| { |
| struct wl_resource *resource; |
| |
| resource = wl_resource_create(client, interface, -1, 0); |
| if (resource == NULL) |
| wl_client_post_no_memory(client); |
| else |
| wl_resource_set_implementation(resource, |
| implementation, data, NULL); |
| |
| return resource; |
| } |
| |
| struct wl_global * |
| wl_display_add_global(struct wl_display *display, |
| const struct wl_interface *interface, |
| void *data, wl_global_bind_func_t bind) WL_DEPRECATED; |
| |
| WL_EXPORT struct wl_global * |
| wl_display_add_global(struct wl_display *display, |
| const struct wl_interface *interface, |
| void *data, wl_global_bind_func_t bind) |
| { |
| return wl_global_create(display, interface, interface->version, data, bind); |
| } |
| |
| void |
| wl_display_remove_global(struct wl_display *display, |
| struct wl_global *global) WL_DEPRECATED; |
| |
| WL_EXPORT void |
| wl_display_remove_global(struct wl_display *display, struct wl_global *global) |
| { |
| wl_global_destroy(global); |
| } |
| |
| /** Add support for a wl_shm pixel format |
| * |
| * \param display The display object |
| * \param format The wl_shm pixel format to advertise |
| * \return A pointer to the wl_shm format that was added to the list |
| * or NULL if adding it to the list failed. |
| * |
| * Add the specified wl_shm format to the list of formats the wl_shm |
| * object advertises when a client binds to it. Adding a format to |
| * the list means that clients will know that the compositor supports |
| * this format and may use it for creating wl_shm buffers. The |
| * compositor must be able to handle the pixel format when a client |
| * requests it. |
| * |
| * The compositor by default supports WL_SHM_FORMAT_ARGB8888 and |
| * WL_SHM_FORMAT_XRGB8888. |
| * |
| * \memberof wl_display |
| */ |
| WL_EXPORT uint32_t * |
| wl_display_add_shm_format(struct wl_display *display, uint32_t format) |
| { |
| uint32_t *p = NULL; |
| |
| p = wl_array_add(&display->additional_shm_formats, sizeof *p); |
| |
| if (p != NULL) |
| *p = format; |
| return p; |
| } |
| |
| /** |
| * Get list of additional wl_shm pixel formats |
| * |
| * \param display The display object |
| * |
| * This function returns the list of addition wl_shm pixel formats |
| * that the compositor supports. WL_SHM_FORMAT_ARGB8888 and |
| * WL_SHM_FORMAT_XRGB8888 are always supported and not included in the |
| * array, but all formats added through wl_display_add_shm_format() |
| * will be in the array. |
| * |
| * \sa wl_display_add_shm_format() |
| * |
| * \memberof wl_display |
| */ |
| struct wl_array * |
| wl_display_get_additional_shm_formats(struct wl_display *display) |
| { |
| return &display->additional_shm_formats; |
| } |