1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
#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.events.active, NULL);
}
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.events.active, NULL);
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 enum wlr_log_importance libseat_log_level_to_wlr(
enum libseat_log_level level) {
switch (level) {
case LIBSEAT_LOG_LEVEL_ERROR:
return WLR_ERROR;
case LIBSEAT_LOG_LEVEL_INFO:
return WLR_INFO;
default:
return WLR_DEBUG;
}
}
static void log_libseat(enum libseat_log_level level,
const char *fmt, va_list args) {
enum wlr_log_importance importance = libseat_log_level_to_wlr(level);
static char wlr_fmt[1024];
snprintf(wlr_fmt, sizeof(wlr_fmt), "[libseat] %s", fmt);
_wlr_vlog(importance, wlr_fmt, args);
}
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);
libseat_set_log_handler(log_libseat);
libseat_set_log_level(LIBSEAT_LOG_LEVEL_ERROR);
// libseat will take care of updating the logind state if necessary
setenv("XDG_SESSION_TYPE", "wayland", 1);
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) == 0;
}
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,
};
|
