session: Add libseat backend

This commit is contained in:
Kenny Levinsen 2020-07-25 21:53:06 +02:00 committed by Simon Ser
parent 9feeb2738d
commit bad1e9afa8
13 changed files with 244 additions and 7 deletions

View file

@ -16,7 +16,7 @@ sources:
tasks:
- setup: |
cd wlroots
meson build -Dauto_features=enabled -Dlogind=disabled -Dxcb-errors=disabled
meson build -Dauto_features=enabled -Dlogind=disabled -Dlibseat=disabled -Dxcb-errors=disabled
- build: |
cd wlroots
ninja -C build

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@ -12,6 +12,7 @@ packages:
- xcb-util-errors
- xcb-util-image
- xcb-util-wm
- seatd
sources:
- https://github.com/swaywm/wlroots
tasks:

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@ -18,6 +18,7 @@ packages:
- x11/pixman
- x11/xcb-util-errors
- x11/xcb-util-wm
- sysutils/seatd
sources:
- https://github.com/swaywm/wlroots
tasks:

View file

@ -18,6 +18,7 @@
#include <wlr/backend/session/interface.h>
#include <wlr/util/log.h>
#include "backend/session/direct-ipc.h"
#include "backend/session/session.h"
#include "util/signal.h"
enum { DRM_MAJOR = 226 };
@ -246,6 +247,7 @@ static struct wlr_session *direct_session_create(struct wl_display *disp) {
return NULL;
}
session_init(&session->base);
session->sock = direct_ipc_init(&session->child);
if (session->sock == -1) {
goto error_session;
@ -267,6 +269,7 @@ static struct wlr_session *direct_session_create(struct wl_display *disp) {
snprintf(session->base.seat, sizeof(session->base.seat), "%s", seat);
session->base.impl = &session_direct;
session->base.active = true;
wlr_log(WLR_INFO, "Successfully loaded direct session");
return &session->base;

190
backend/session/libseat.c Normal file
View file

@ -0,0 +1,190 @@
#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wayland-server-core.h>
#include <wlr/backend/session/interface.h>
#include <wlr/config.h>
#include <wlr/util/log.h>
#include "backend/session/session.h"
#include "util/signal.h"
#include <libseat.h>
const struct session_impl session_libseat;
struct libseat_device {
struct wl_list link;
int fd;
int device_id;
};
struct libseat_session {
struct wlr_session base;
struct libseat *seat;
struct wl_event_source *event;
struct wl_list devices;
};
static void handle_enable_seat(struct libseat *seat, void *data) {
struct libseat_session *session = data;
session->base.active = true;
wlr_signal_emit_safe(&session->base.session_signal, session);
}
static void handle_disable_seat(struct libseat *seat, void *data) {
struct libseat_session *session = data;
session->base.active = false;
wlr_signal_emit_safe(&session->base.session_signal, session);
libseat_disable_seat(session->seat);
}
static int libseat_event(int fd, uint32_t mask, void *data) {
struct libseat *seat = data;
libseat_dispatch(seat, 0);
return 1;
}
static struct libseat_seat_listener seat_listener = {
.enable_seat = handle_enable_seat,
.disable_seat = handle_disable_seat,
};
static struct libseat_session *libseat_session_from_session(
struct wlr_session *base) {
assert(base->impl == &session_libseat);
return (struct libseat_session *)base;
}
static struct wlr_session *libseat_session_create(struct wl_display *disp) {
struct libseat_session *session = calloc(1, sizeof(*session));
if (!session) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return NULL;
}
session_init(&session->base);
wl_list_init(&session->devices);
session->seat = libseat_open_seat(&seat_listener, session);
if (session->seat == NULL) {
wlr_log_errno(WLR_ERROR, "Unable to create seat");
goto error;
}
const char *seat_name = libseat_seat_name(session->seat);
if (seat_name == NULL) {
wlr_log_errno(WLR_ERROR, "Unable to get seat info");
goto error;
}
snprintf(session->base.seat, sizeof(session->base.seat), "%s", seat_name);
struct wl_event_loop *event_loop = wl_display_get_event_loop(disp);
session->event = wl_event_loop_add_fd(event_loop, libseat_get_fd(session->seat),
WL_EVENT_READABLE, libseat_event, session->seat);
if (session->event == NULL) {
wlr_log(WLR_ERROR, "Failed to create libseat event source");
goto error;
}
// We may have received enable_seat immediately after the open_seat result,
// so, dispatch once without timeout to speed up activation.
if (libseat_dispatch(session->seat, 0) == -1) {
wlr_log_errno(WLR_ERROR, "libseat dispatch failed");
goto error;
}
wlr_log(WLR_INFO, "Successfully loaded libseat session");
session->base.impl = &session_libseat;
return &session->base;
error:
if (session->seat != NULL) {
libseat_close_seat(session->seat);
}
if (session->event != NULL) {
wl_event_source_remove(session->event);
}
free(session);
return NULL;
}
static void libseat_session_destroy(struct wlr_session *base) {
struct libseat_session *session = libseat_session_from_session(base);
libseat_close_seat(session->seat);
wl_event_source_remove(session->event);
free(session);
}
static struct libseat_device *find_device_by_fd(struct libseat_session *session, int fd) {
struct libseat_device *dev;
wl_list_for_each(dev, &session->devices, link) {
if (dev->fd == fd) {
return dev;
}
}
return NULL;
}
static int libseat_session_open_device(struct wlr_session *base, const char *path) {
struct libseat_session *session = libseat_session_from_session(base);
int fd;
int device_id = libseat_open_device(session->seat, path, &fd);
if (device_id == -1) {
wlr_log_errno(WLR_ERROR, "Failed to open device '%s'", path);
return -1;
}
struct libseat_device *dev = calloc(1, sizeof(struct libseat_device));
if (dev == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
libseat_close_device(session->seat, device_id);
return -1;
}
dev->fd = fd;
dev->device_id = device_id;
wl_list_insert(&session->devices, &dev->link);
return fd;
}
static void libseat_session_close_device(struct wlr_session *base, int fd) {
struct libseat_session *session = libseat_session_from_session(base);
struct libseat_device *dev = find_device_by_fd(session, fd);
if (dev == NULL) {
wlr_log(WLR_ERROR, "No device with fd %d found", fd);
close(fd);
return;
}
if (libseat_close_device(session->seat, dev->device_id) == -1) {
wlr_log_errno(WLR_ERROR, "Failed to close device %d", dev->device_id);
}
wl_list_remove(&dev->link);
free(dev);
close(fd);
}
static bool libseat_change_vt(struct wlr_session *base, unsigned vt) {
struct libseat_session *session = libseat_session_from_session(base);
return libseat_switch_session(session->seat, vt);
}
const struct session_impl session_libseat = {
.create = libseat_session_create,
.destroy = libseat_session_destroy,
.open = libseat_session_open_device,
.close = libseat_session_close_device,
.change_vt = libseat_change_vt,
};

View file

@ -13,6 +13,7 @@
#include <wlr/backend/session/interface.h>
#include <wlr/config.h>
#include <wlr/util/log.h>
#include "backend/session/session.h"
#include "util/signal.h"
#if WLR_HAS_SYSTEMD
@ -778,6 +779,8 @@ static struct wlr_session *logind_session_create(struct wl_display *disp) {
return NULL;
}
session_init(&session->base);
if (!get_display_session(&session->id)) {
goto error;
}
@ -855,6 +858,8 @@ static struct wlr_session *logind_session_create(struct wl_display *disp) {
wlr_log(WLR_INFO, "Successfully loaded logind session");
session->base.impl = &session_logind;
session->base.active = true;
return &session->base;
error_bus:

View file

@ -62,3 +62,12 @@ if logind_found
wlr_files += files('logind.c')
wlr_deps += logind
endif
# libseat
libseat = dependency('libseat', required: get_option('libseat'))
if libseat.found()
wlr_files += files('libseat.c')
wlr_deps += libseat
conf_data.set10('WLR_HAS_LIBSEAT', true)
endif

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@ -6,6 +6,7 @@
#include <wayland-server-core.h>
#include <wlr/backend/session/interface.h>
#include <wlr/util/log.h>
#include "backend/session/session.h"
#include "util/signal.h"
const struct session_impl session_noop;
@ -33,7 +34,9 @@ static struct wlr_session *noop_session_create(struct wl_display *disp) {
return NULL;
}
session_init(session);
session->impl = &session_noop;
session->active = true;
wlr_log(WLR_INFO, "Successfully initialized noop session");
return session;

View file

@ -13,13 +13,18 @@
#include <wlr/util/log.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include "backend/session/session.h"
#include "util/signal.h"
extern const struct session_impl session_libseat;
extern const struct session_impl session_logind;
extern const struct session_impl session_direct;
extern const struct session_impl session_noop;
static const struct session_impl *impls[] = {
#if WLR_HAS_LIBSEAT
&session_libseat,
#endif
#if WLR_HAS_SYSTEMD || WLR_HAS_ELOGIND
&session_logind,
#endif
@ -65,12 +70,24 @@ static void handle_display_destroy(struct wl_listener *listener, void *data) {
wlr_session_destroy(session);
}
void session_init(struct wlr_session *session) {
wl_signal_init(&session->session_signal);
wl_signal_init(&session->events.destroy);
wl_list_init(&session->devices);
}
struct wlr_session *wlr_session_create(struct wl_display *disp) {
struct wlr_session *session = NULL;
const char *env_wlr_session = getenv("WLR_SESSION");
if (env_wlr_session) {
if (strcmp(env_wlr_session, "logind") == 0 ||
if (strcmp(env_wlr_session, "libseat") == 0) {
#if WLR_HAS_LIBSEAT
session = session_libseat.create(disp);
#else
wlr_log(WLR_ERROR, "wlroots is not compiled with libseat support");
#endif
} else if (strcmp(env_wlr_session, "logind") == 0 ||
strcmp(env_wlr_session, "systemd") == 0) {
#if WLR_HAS_SYSTEMD || WLR_HAS_ELOGIND
session = session_logind.create(disp);
@ -97,11 +114,6 @@ struct wlr_session *wlr_session_create(struct wl_display *disp) {
return NULL;
}
session->active = true;
wl_signal_init(&session->session_signal);
wl_signal_init(&session->events.destroy);
wl_list_init(&session->devices);
session->udev = udev_new();
if (!session->udev) {
wlr_log_errno(WLR_ERROR, "Failed to create udev context");

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@ -0,0 +1,8 @@
#ifndef BACKEND_SESSION_SESSION_H
#define BACKEND_SESSION_SESSION_H
struct wlr_session;
void session_init(struct wlr_session *session);
#endif

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@ -8,6 +8,8 @@
#mesondefine WLR_HAS_SYSTEMD
#mesondefine WLR_HAS_ELOGIND
#mesondefine WLR_HAS_LIBSEAT
#mesondefine WLR_HAS_X11_BACKEND
#mesondefine WLR_HAS_XWAYLAND

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@ -82,6 +82,7 @@ endif
conf_data = configuration_data()
conf_data.set10('WLR_HAS_SYSTEMD', false)
conf_data.set10('WLR_HAS_ELOGIND', false)
conf_data.set10('WLR_HAS_LIBSEAT', false)
conf_data.set10('WLR_HAS_X11_BACKEND', false)
conf_data.set10('WLR_HAS_XWAYLAND', false)
conf_data.set10('WLR_HAS_XCB_ERRORS', false)
@ -176,6 +177,7 @@ meson.override_dependency('wlroots', wlroots)
summary({
'systemd': conf_data.get('WLR_HAS_SYSTEMD', 0),
'elogind': conf_data.get('WLR_HAS_ELOGIND', 0),
'libseat': conf_data.get('WLR_HAS_LIBSEAT', 0),
'xwayland': conf_data.get('WLR_HAS_XWAYLAND', 0),
'x11_backend': conf_data.get('WLR_HAS_X11_BACKEND', 0),
'xcb-icccm': conf_data.get('WLR_HAS_XCB_ICCCM', 0),

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@ -1,5 +1,6 @@
option('logind', type: 'feature', value: 'auto', description: 'Enable support for rootless session via logind')
option('logind-provider', type: 'combo', choices: ['auto', 'systemd', 'elogind'], value: 'auto', description: 'Provider of logind support library')
option('libseat', type: 'feature', value: 'auto', description: 'Enable support for rootless session via libseat')
option('xcb-errors', type: 'feature', value: 'auto', description: 'Use xcb-errors util library')
option('xcb-icccm', type: 'feature', value: 'auto', description: 'Use xcb-icccm util library')
option('xwayland', type: 'feature', value: 'auto', yield: true, description: 'Enable support for X11 applications')