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libweston: Remove dbus helpers

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Now that launcher-logind is gone, we don't use any of this anymore.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
This commit is contained in:
Derek Foreman 2023-09-29 08:39:51 -05:00
parent e3b6ed50f1
commit 4f17af4691
6 changed files with 0 additions and 566 deletions
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110
include/libweston/dbus.h
View File

@ -1,110 +0,0 @@
/*
* Copyright © 2013 David Herrmann <dh.herrmann@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _WESTON_DBUS_H_
#define _WESTON_DBUS_H_
#include "config.h"
#include <errno.h>
#include <wayland-server.h>
#include <libweston/libweston.h>
#ifdef HAVE_DBUS
#include <dbus/dbus.h>
/*
* weston_dbus_open() - Open new dbus connection
*
* Opens a new dbus connection to the bus given as @bus. It automatically
* integrates the new connection into the main-loop @loop. The connection
* itself is returned in @out.
* This also returns a context source used for dbus dispatching. It is
* returned on success in @ctx_out and must be passed to weston_dbus_close()
* unchanged. You must not access it from outside of a dbus helper!
*
* Returns 0 on success, negative error code on failure.
*/
int weston_dbus_open(struct wl_event_loop *loop, DBusBusType bus,
DBusConnection **out, struct wl_event_source **ctx_out);
/*
* weston_dbus_close() - Close dbus connection
*
* Closes a dbus connection that was previously opened via weston_dbus_open().
* It unbinds the connection from the main-loop it was previously bound to,
* closes the dbus connection and frees all resources. If you want to access
* @c after this call returns, you must hold a dbus-reference to it. But
* notice that the connection is closed after this returns so it cannot be
* used to spawn new dbus requests.
* You must pass the context source returns by weston_dbus_open() as @ctx.
*/
void weston_dbus_close(DBusConnection *c, struct wl_event_source *ctx);
/*
* weston_dbus_add_match() - Add dbus match
*
* Configure a dbus-match on the given dbus-connection. This match is saved
* on the dbus-server as long as the connection is open. See dbus-manual
* for information. Compared to the dbus_bus_add_match() this allows a
* var-arg formatted match-string.
*/
int weston_dbus_add_match(DBusConnection *c, const char *format, ...);
/*
* weston_dbus_add_match_signal() - Add dbus signal match
*
* Same as weston_dbus_add_match() but does the dbus-match formatting for
* signals internally.
*/
int weston_dbus_add_match_signal(DBusConnection *c, const char *sender,
const char *iface, const char *member,
const char *path);
/*
* weston_dbus_remove_match() - Remove dbus match
*
* Remove a previously configured dbus-match from the dbus server. There is
* no need to remove dbus-matches if you close the connection, anyway.
* Compared to dbus_bus_remove_match() this allows a var-arg formatted
* match string.
*/
void weston_dbus_remove_match(DBusConnection *c, const char *format, ...);
/*
* weston_dbus_remove_match_signal() - Remove dbus signal match
*
* Same as weston_dbus_remove_match() but does the dbus-match formatting for
* signals internally.
*/
void weston_dbus_remove_match_signal(DBusConnection *c, const char *sender,
const char *iface, const char *member,
const char *path);
#endif /* HAVE_DBUS */
#endif // _WESTON_DBUS_H_

1
include/libweston/meson.build
View File

@ -21,7 +21,6 @@ backend_vnc_h = files('backend-vnc.h')
backend_wayland_h = files('backend-wayland.h')
backend_x11_h = files('backend-x11.h')
dbus_h = files('dbus.h')
xwayland_api_h = files('xwayland-api.h')
libweston_version_h = configuration_data()

408
libweston/dbus/dbus.c
View File

@ -1,408 +0,0 @@
/*
* Copyright © 2013 David Herrmann <dh.herrmann@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* DBus Helpers
* This file contains the dbus mainloop integration and several helpers to
* make lowlevel libdbus access easier.
*/
#include "config.h"
#include <dbus/dbus.h>
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/eventfd.h>
#include <sys/timerfd.h>
#include <unistd.h>
#include <wayland-server.h>
#include <libweston/libweston.h>
#include <libweston/dbus.h>
/*
* DBus Mainloop Integration
* weston_dbus_bind() and weston_dbus_unbind() allow to bind an existing
* DBusConnection to an existing wl_event_loop object. All dbus dispatching
* is then nicely integrated into the wayland event loop.
* Note that this only provides basic watch and timeout dispatching. No
* remote thread wakeup, signal handling or other dbus insanity is supported.
* This is fine as long as you don't use any of the deprecated libdbus
* interfaces (like waking up remote threads..). There is really no rational
* reason to support these.
*/
static int weston_dbus_dispatch_watch(int fd, uint32_t mask, void *data)
{
DBusWatch *watch = data;
uint32_t flags = 0;
if (dbus_watch_get_enabled(watch)) {
if (mask & WL_EVENT_READABLE)
flags |= DBUS_WATCH_READABLE;
if (mask & WL_EVENT_WRITABLE)
flags |= DBUS_WATCH_WRITABLE;
if (mask & WL_EVENT_HANGUP)
flags |= DBUS_WATCH_HANGUP;
if (mask & WL_EVENT_ERROR)
flags |= DBUS_WATCH_ERROR;
dbus_watch_handle(watch, flags);
}
return 0;
}
static dbus_bool_t weston_dbus_add_watch(DBusWatch *watch, void *data)
{
struct wl_event_loop *loop = data;
struct wl_event_source *s;
int fd;
uint32_t mask = 0, flags;
if (dbus_watch_get_enabled(watch)) {
flags = dbus_watch_get_flags(watch);
if (flags & DBUS_WATCH_READABLE)
mask |= WL_EVENT_READABLE;
if (flags & DBUS_WATCH_WRITABLE)
mask |= WL_EVENT_WRITABLE;
}
fd = dbus_watch_get_unix_fd(watch);
s = wl_event_loop_add_fd(loop, fd, mask, weston_dbus_dispatch_watch,
watch);
if (!s)
return FALSE;
dbus_watch_set_data(watch, s, NULL);
return TRUE;
}
static void weston_dbus_remove_watch(DBusWatch *watch, void *data)
{
struct wl_event_source *s;
s = dbus_watch_get_data(watch);
if (!s)
return;
wl_event_source_remove(s);
}
static void weston_dbus_toggle_watch(DBusWatch *watch, void *data)
{
struct wl_event_source *s;
uint32_t mask = 0, flags;
s = dbus_watch_get_data(watch);
if (!s)
return;
if (dbus_watch_get_enabled(watch)) {
flags = dbus_watch_get_flags(watch);
if (flags & DBUS_WATCH_READABLE)
mask |= WL_EVENT_READABLE;
if (flags & DBUS_WATCH_WRITABLE)
mask |= WL_EVENT_WRITABLE;
}
wl_event_source_fd_update(s, mask);
}
static int weston_dbus_dispatch_timeout(void *data)
{
DBusTimeout *timeout = data;
if (dbus_timeout_get_enabled(timeout))
dbus_timeout_handle(timeout);
return 0;
}
static int weston_dbus_adjust_timeout(DBusTimeout *timeout,
struct wl_event_source *s)
{
int64_t t = 0;
if (dbus_timeout_get_enabled(timeout))
t = dbus_timeout_get_interval(timeout);
return wl_event_source_timer_update(s, t);
}
static dbus_bool_t weston_dbus_add_timeout(DBusTimeout *timeout, void *data)
{
struct wl_event_loop *loop = data;
struct wl_event_source *s;
int r;
s = wl_event_loop_add_timer(loop, weston_dbus_dispatch_timeout,
timeout);
if (!s)
return FALSE;
r = weston_dbus_adjust_timeout(timeout, s);
if (r < 0) {
wl_event_source_remove(s);
return FALSE;
}
dbus_timeout_set_data(timeout, s, NULL);
return TRUE;
}
static void weston_dbus_remove_timeout(DBusTimeout *timeout, void *data)
{
struct wl_event_source *s;
s = dbus_timeout_get_data(timeout);
if (!s)
return;
wl_event_source_remove(s);
}
static void weston_dbus_toggle_timeout(DBusTimeout *timeout, void *data)
{
struct wl_event_source *s;
s = dbus_timeout_get_data(timeout);
if (!s)
return;
weston_dbus_adjust_timeout(timeout, s);
}
static int weston_dbus_dispatch(int fd, uint32_t mask, void *data)
{
DBusConnection *c = data;
int r;
do {
r = dbus_connection_dispatch(c);
if (r == DBUS_DISPATCH_COMPLETE)
r = 0;
else if (r == DBUS_DISPATCH_DATA_REMAINS)
r = -EAGAIN;
else if (r == DBUS_DISPATCH_NEED_MEMORY)
r = -ENOMEM;
else
r = -EIO;
} while (r == -EAGAIN);
if (r)
weston_log("cannot dispatch dbus events: %d\n", r);
return 0;
}
static int weston_dbus_bind(struct wl_event_loop *loop, DBusConnection *c,
struct wl_event_source **ctx_out)
{
bool b;
int r, fd;
/* Idle events cannot reschedule themselves, therefore we use a dummy
* event-fd and mark it for post-dispatch. Hence, the dbus
* dispatcher is called after every dispatch-round.
* This is required as dbus doesn't allow dispatching events from
* within its own event sources. */
fd = eventfd(0, EFD_CLOEXEC);
if (fd < 0)
return -errno;
*ctx_out = wl_event_loop_add_fd(loop, fd, 0, weston_dbus_dispatch, c);
close(fd);
if (!*ctx_out)
return -ENOMEM;
wl_event_source_check(*ctx_out);
b = dbus_connection_set_watch_functions(c,
weston_dbus_add_watch,
weston_dbus_remove_watch,
weston_dbus_toggle_watch,
loop,
NULL);
if (!b) {
r = -ENOMEM;
goto error;
}
b = dbus_connection_set_timeout_functions(c,
weston_dbus_add_timeout,
weston_dbus_remove_timeout,
weston_dbus_toggle_timeout,
loop,
NULL);
if (!b) {
r = -ENOMEM;
goto error;
}
dbus_connection_ref(c);
return 0;
error:
dbus_connection_set_timeout_functions(c, NULL, NULL, NULL,
NULL, NULL);
dbus_connection_set_watch_functions(c, NULL, NULL, NULL,
NULL, NULL);
wl_event_source_remove(*ctx_out);
*ctx_out = NULL;
return r;
}
static void weston_dbus_unbind(DBusConnection *c, struct wl_event_source *ctx)
{
dbus_connection_set_timeout_functions(c, NULL, NULL, NULL,
NULL, NULL);
dbus_connection_set_watch_functions(c, NULL, NULL, NULL,
NULL, NULL);
dbus_connection_unref(c);
wl_event_source_remove(ctx);
}
/*
* Convenience Helpers
* Several convenience helpers are provided to make using dbus in weston
* easier. We don't use any of the gdbus or qdbus helpers as they pull in
* huge dependencies and actually are quite awful to use. Instead, we only
* use the basic low-level libdbus library.
*/
int weston_dbus_open(struct wl_event_loop *loop, DBusBusType bus,
DBusConnection **out, struct wl_event_source **ctx_out)
{
DBusConnection *c;
int r;
/* Ihhh, global state.. stupid dbus. */
dbus_connection_set_change_sigpipe(FALSE);
/* This is actually synchronous. It blocks for some authentication and
* setup. We just trust the dbus-server here and accept this blocking
* call. There is no real reason to complicate things further and make
* this asynchronous/non-blocking. A context should be created during
* thead/process/app setup, so blocking calls should be fine. */
c = dbus_bus_get_private(bus, NULL);
if (!c)
return -EIO;
dbus_connection_set_exit_on_disconnect(c, FALSE);
r = weston_dbus_bind(loop, c, ctx_out);
if (r < 0)
goto error;
*out = c;
return r;
error:
dbus_connection_close(c);
dbus_connection_unref(c);
return r;
}
void weston_dbus_close(DBusConnection *c, struct wl_event_source *ctx)
{
weston_dbus_unbind(c, ctx);
dbus_connection_close(c);
dbus_connection_unref(c);
}
int weston_dbus_add_match(DBusConnection *c, const char *format, ...)
{
DBusError err;
int r;
va_list list;
char *str;
va_start(list, format);
r = vasprintf(&str, format, list);
va_end(list);
if (r < 0)
return -ENOMEM;
dbus_error_init(&err);
dbus_bus_add_match(c, str, &err);
free(str);
if (dbus_error_is_set(&err)) {
dbus_error_free(&err);
return -EIO;
}
return 0;
}
int weston_dbus_add_match_signal(DBusConnection *c, const char *sender,
const char *iface, const char *member,
const char *path)
{
return weston_dbus_add_match(c,
"type='signal',"
"sender='%s',"
"interface='%s',"
"member='%s',"
"path='%s'",
sender, iface, member, path);
}
void weston_dbus_remove_match(DBusConnection *c, const char *format, ...)
{
int r;
va_list list;
char *str;
va_start(list, format);
r = vasprintf(&str, format, list);
va_end(list);
if (r < 0)
return;
dbus_bus_remove_match(c, str, NULL);
free(str);
}
void weston_dbus_remove_match_signal(DBusConnection *c, const char *sender,
const char *iface, const char *member,
const char *path)
{
weston_dbus_remove_match(c,
"type='signal',"
"sender='%s',"
"interface='%s',"
"member='%s',"
"path='%s'",
sender, iface, member, path);
}

38
libweston/dbus/meson.build
View File

@ -1,38 +0,0 @@
if not get_option('dbus')
dep_dbus = declare_dependency()
subdir_done()
endif
dbus_dep = dependency('dbus-1', version: '>= 1.6', required: false)
if not dbus_dep.found()
error('dbus support requires dbus-1 >= 1.6 which was not found. Or, you can use \'-Ddbus=false\'')
endif
config_h.set('HAVE_DBUS', '1')
srcs_dbus = [
'dbus.c',
]
deps_dbus = [
dep_libweston_private,
dbus_dep,
]
lib_dbus = static_library(
'dbus',
srcs_dbus,
include_directories: common_inc,
dependencies: deps_dbus,
name_prefix: '',
install: true,
install_dir: dir_module_libweston
)
dep_dbus = declare_dependency(
link_with: lib_dbus,
dependencies: deps_dbus,
include_directories: include_directories('.')
)
install_headers(dbus_h, subdir: dir_include_libweston_install)

2
libweston/meson.build
View File

@ -162,8 +162,6 @@ pkgconfig.generate(
install_dir: dir_data_pc
)
subdir('dbus')
if get_option('backend-drm')
dep_libseat = dependency('libseat', version: '>= 0.4')
srcs_session_helper = [

7
meson_options.txt
View File

@ -156,13 +156,6 @@ option(
description: 'DEPRECATED: color management plugin cms-colord (requires cms-static)'
)
option(
'dbus',
type: 'boolean',
value: true,
description: 'D-Bus protocol support'
)
option(
'image-jpeg',
type: 'boolean',