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
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
/*
* System View
* The sysview interface scans and monitors the system for seats, sessions and
* devices. It basically mirrors the state of logind on the application side.
* It's meant as base for session services that require managed device access.
* The logind controller API is employed to allow unprivileged access to all
* devices of a user.
* Furthermore, the sysview interface can be used for system services that run
* in situations where logind is not available, but session-like services are
* needed. For instance, the initrd does not run logind but might require
* graphics access. It cannot run session services, though. The sysview
* interface pretends that a session is available and provides the same
* interface as to normal session services.
*/
#pragma once
#include <stdbool.h>
#include "sd-bus.h"
#include "sd-event.h"
typedef struct sysview_event sysview_event;
typedef struct sysview_device sysview_device;
typedef struct sysview_session sysview_session;
typedef struct sysview_seat sysview_seat;
typedef struct sysview_context sysview_context;
/*
* Events
*/
enum {
SYSVIEW_EVENT_SETTLE,
SYSVIEW_EVENT_SEAT_ADD,
SYSVIEW_EVENT_SEAT_REMOVE,
SYSVIEW_EVENT_SESSION_FILTER,
SYSVIEW_EVENT_SESSION_ADD,
SYSVIEW_EVENT_SESSION_REMOVE,
SYSVIEW_EVENT_SESSION_ATTACH,
SYSVIEW_EVENT_SESSION_DETACH,
SYSVIEW_EVENT_SESSION_REFRESH,
SYSVIEW_EVENT_SESSION_CONTROL,
};
struct sysview_event {
unsigned int type;
union {
struct {
sysview_seat *seat;
} seat_add, seat_remove;
struct {
const char *id;
const char *seatid;
const char *username;
unsigned int uid;
} session_filter;
struct {
sysview_session *session;
} session_add, session_remove;
struct {
sysview_session *session;
sysview_device *device;
} session_attach, session_detach;
struct {
sysview_session *session;
sysview_device *device;
struct udev_device *ud;
} session_refresh;
struct {
sysview_session *session;
int error;
} session_control;
};
};
typedef int (*sysview_event_fn) (sysview_context *c, void *userdata, sysview_event *e);
/*
* Devices
*/
enum {
SYSVIEW_DEVICE_EVDEV,
SYSVIEW_DEVICE_DRM,
SYSVIEW_DEVICE_CNT
};
const char *sysview_device_get_name(sysview_device *device);
unsigned int sysview_device_get_type(sysview_device *device);
struct udev_device *sysview_device_get_ud(sysview_device *device);
/*
* Sessions
*/
void sysview_session_set_userdata(sysview_session *session, void *userdata);
void *sysview_session_get_userdata(sysview_session *session);
const char *sysview_session_get_name(sysview_session *session);
sysview_seat *sysview_session_get_seat(sysview_session *session);
int sysview_session_take_control(sysview_session *session);
void sysview_session_release_control(sysview_session *session);
/*
* Seats
*/
const char *sysview_seat_get_name(sysview_seat *seat);
int sysview_seat_switch_to(sysview_seat *seat, uint32_t nr);
/*
* Contexts
*/
enum {
SYSVIEW_CONTEXT_SCAN_LOGIND = (1 << 0),
SYSVIEW_CONTEXT_SCAN_EVDEV = (1 << 1),
SYSVIEW_CONTEXT_SCAN_DRM = (1 << 2),
};
int sysview_context_new(sysview_context **out,
unsigned int flags,
sd_event *event,
sd_bus *sysbus,
struct udev *ud);
sysview_context *sysview_context_free(sysview_context *c);
DEFINE_TRIVIAL_CLEANUP_FUNC(sysview_context*, sysview_context_free);
bool sysview_context_is_running(sysview_context *c);
int sysview_context_start(sysview_context *c, sysview_event_fn event_fn, void *userdata);
void sysview_context_stop(sysview_context *c);
|
