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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
20263082 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2011 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
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8 | under the terms of the GNU Lesser General Public License as published by |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
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10 | (at your option) any later version. |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 15 | Lesser General Public License for more details. |
20263082 | 16 | |
5430f7f2 | 17 | You should have received a copy of the GNU Lesser General Public License |
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18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
19 | ***/ | |
20 | ||
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21 | #include <string.h> |
22 | ||
b5efdb8a | 23 | #include "alloc-util.h" |
cc377381 | 24 | #include "logind-device.h" |
b5efdb8a | 25 | #include "util.h" |
20263082 | 26 | |
718d006a | 27 | Device* device_new(Manager *m, const char *sysfs, bool master) { |
20263082 LP |
28 | Device *d; |
29 | ||
30 | assert(m); | |
31 | assert(sysfs); | |
32 | ||
33 | d = new0(Device, 1); | |
34 | if (!d) | |
35 | return NULL; | |
36 | ||
37 | d->sysfs = strdup(sysfs); | |
6b430fdb ZJS |
38 | if (!d->sysfs) |
39 | return mfree(d); | |
20263082 LP |
40 | |
41 | if (hashmap_put(m->devices, d->sysfs, d) < 0) { | |
42 | free(d->sysfs); | |
6b430fdb | 43 | return mfree(d); |
20263082 LP |
44 | } |
45 | ||
46 | d->manager = m; | |
718d006a | 47 | d->master = master; |
20263082 LP |
48 | dual_timestamp_get(&d->timestamp); |
49 | ||
50 | return d; | |
51 | } | |
52 | ||
9588bc32 | 53 | static void device_detach(Device *d) { |
f1a8e221 | 54 | Seat *s; |
118ecf32 | 55 | SessionDevice *sd; |
cc377381 | 56 | |
20263082 LP |
57 | assert(d); |
58 | ||
f1a8e221 LP |
59 | if (!d->seat) |
60 | return; | |
20263082 | 61 | |
118ecf32 DH |
62 | while ((sd = d->session_devices)) |
63 | session_device_free(sd); | |
64 | ||
f1a8e221 | 65 | s = d->seat; |
71fda00f | 66 | LIST_REMOVE(devices, d->seat->devices, d); |
20263082 | 67 | d->seat = NULL; |
f1a8e221 | 68 | |
718d006a DH |
69 | if (!seat_has_master_device(s)) { |
70 | seat_add_to_gc_queue(s); | |
cc377381 | 71 | seat_send_changed(s, "CanGraphical", NULL); |
718d006a | 72 | } |
20263082 LP |
73 | } |
74 | ||
9588bc32 LP |
75 | void device_free(Device *d) { |
76 | assert(d); | |
77 | ||
78 | device_detach(d); | |
79 | ||
80 | hashmap_remove(d->manager->devices, d->sysfs); | |
81 | ||
82 | free(d->sysfs); | |
83 | free(d); | |
84 | } | |
85 | ||
20263082 | 86 | void device_attach(Device *d, Seat *s) { |
718d006a DH |
87 | Device *i; |
88 | bool had_master; | |
89 | ||
20263082 LP |
90 | assert(d); |
91 | assert(s); | |
92 | ||
f1a8e221 LP |
93 | if (d->seat == s) |
94 | return; | |
95 | ||
20263082 LP |
96 | if (d->seat) |
97 | device_detach(d); | |
98 | ||
20263082 | 99 | d->seat = s; |
718d006a DH |
100 | had_master = seat_has_master_device(s); |
101 | ||
102 | /* We keep the device list sorted by the "master" flag. That is, master | |
103 | * devices are at the front, other devices at the tail. As there is no | |
104 | * way to easily add devices at the list-tail, we need to iterate the | |
105 | * list to find the first non-master device when adding non-master | |
106 | * devices. We assume there is only a few (normally 1) master devices | |
107 | * per seat, so we iterate only a few times. */ | |
108 | ||
109 | if (d->master || !s->devices) | |
71fda00f | 110 | LIST_PREPEND(devices, s->devices, d); |
718d006a DH |
111 | else { |
112 | LIST_FOREACH(devices, i, s->devices) { | |
113 | if (!i->devices_next || !i->master) { | |
71fda00f | 114 | LIST_INSERT_AFTER(devices, s->devices, i, d); |
718d006a DH |
115 | break; |
116 | } | |
117 | } | |
118 | } | |
f1a8e221 | 119 | |
718d006a | 120 | if (!had_master && d->master) |
cc377381 | 121 | seat_send_changed(s, "CanGraphical", NULL); |
20263082 | 122 | } |