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e9d21f24 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <assert.h> | |
23 | #include <string.h> | |
24 | #include <errno.h> | |
25 | #include <fcntl.h> | |
26 | #include <sys/ioctl.h> | |
27 | #include <unistd.h> | |
28 | #include <linux/input.h> | |
e9d21f24 | 29 | |
cc377381 | 30 | #include "sd-messages.h" |
e9d21f24 LP |
31 | #include "conf-parser.h" |
32 | #include "util.h" | |
e9d21f24 | 33 | #include "special.h" |
cc377381 | 34 | #include "logind-button.h" |
e9d21f24 LP |
35 | |
36 | Button* button_new(Manager *m, const char *name) { | |
37 | Button *b; | |
38 | ||
39 | assert(m); | |
40 | assert(name); | |
41 | ||
42 | b = new0(Button, 1); | |
43 | if (!b) | |
44 | return NULL; | |
45 | ||
46 | b->name = strdup(name); | |
47 | if (!b->name) { | |
48 | free(b); | |
49 | return NULL; | |
50 | } | |
51 | ||
52 | if (hashmap_put(m->buttons, b->name, b) < 0) { | |
53 | free(b->name); | |
54 | free(b); | |
55 | return NULL; | |
56 | } | |
57 | ||
58 | b->manager = m; | |
59 | b->fd = -1; | |
60 | ||
61 | return b; | |
62 | } | |
63 | ||
64 | void button_free(Button *b) { | |
65 | assert(b); | |
66 | ||
67 | hashmap_remove(b->manager->buttons, b->name); | |
68 | ||
cc377381 | 69 | sd_event_source_unref(b->event_source); |
c30a0c62 | 70 | |
cc377381 | 71 | if (b->fd >= 0) { |
c30a0c62 LP |
72 | /* If the device has been unplugged close() returns |
73 | * ENODEV, let's ignore this, hence we don't use | |
74 | * close_nointr_nofail() */ | |
75 | close(b->fd); | |
e9d21f24 LP |
76 | } |
77 | ||
78 | free(b->name); | |
79 | free(b->seat); | |
80 | free(b); | |
81 | } | |
82 | ||
83 | int button_set_seat(Button *b, const char *sn) { | |
84 | char *s; | |
85 | ||
86 | assert(b); | |
87 | assert(sn); | |
88 | ||
89 | s = strdup(sn); | |
90 | if (!s) | |
91 | return -ENOMEM; | |
92 | ||
93 | free(b->seat); | |
94 | b->seat = s; | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
65b51162 LP |
99 | static int button_handle( |
100 | Button *b, | |
101 | InhibitWhat inhibit_key, | |
23406ce5 | 102 | HandleAction handle, |
65b51162 LP |
103 | bool ignore_inhibited, |
104 | bool is_edge) { | |
beaafb2e | 105 | |
e9d21f24 LP |
106 | int r; |
107 | ||
108 | assert(b); | |
109 | ||
23406ce5 LP |
110 | r = manager_handle_action(b->manager, inhibit_key, handle, ignore_inhibited, is_edge); |
111 | if (r > 0) | |
112 | /* We are executing the operation, so make sure we don't | |
113 | * execute another one until the lid is opened/closed again */ | |
114 | b->lid_close_queued = false; | |
6de0e0e5 | 115 | |
23406ce5 | 116 | return r; |
e9d21f24 LP |
117 | } |
118 | ||
cc377381 LP |
119 | static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
120 | Button *b = userdata; | |
e9d21f24 LP |
121 | struct input_event ev; |
122 | ssize_t l; | |
123 | ||
cc377381 LP |
124 | assert(s); |
125 | assert(fd == b->fd); | |
e9d21f24 LP |
126 | assert(b); |
127 | ||
128 | l = read(b->fd, &ev, sizeof(ev)); | |
129 | if (l < 0) | |
130 | return errno != EAGAIN ? -errno : 0; | |
131 | if ((size_t) l < sizeof(ev)) | |
132 | return -EIO; | |
133 | ||
e9d21f24 LP |
134 | if (ev.type == EV_KEY && ev.value > 0) { |
135 | ||
136 | switch (ev.code) { | |
137 | ||
138 | case KEY_POWER: | |
139 | case KEY_POWER2: | |
c485437f ZJS |
140 | log_struct(LOG_INFO, |
141 | "MESSAGE=Power key pressed.", | |
142 | MESSAGE_ID(SD_MESSAGE_POWER_KEY), | |
143 | NULL); | |
65b51162 | 144 | return button_handle(b, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true); |
e9d21f24 | 145 | |
8e7fd6ad LP |
146 | /* The kernel is a bit confused here: |
147 | ||
148 | KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend" | |
149 | KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate" | |
150 | */ | |
151 | ||
e9d21f24 | 152 | case KEY_SLEEP: |
c485437f ZJS |
153 | log_struct(LOG_INFO, |
154 | "MESSAGE=Suspend key pressed.", | |
155 | MESSAGE_ID(SD_MESSAGE_SUSPEND_KEY), | |
156 | NULL); | |
8e7fd6ad | 157 | return button_handle(b, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true); |
e9d21f24 | 158 | |
8e7fd6ad | 159 | case KEY_SUSPEND: |
c485437f ZJS |
160 | log_struct(LOG_INFO, |
161 | "MESSAGE=Hibernate key pressed.", | |
162 | MESSAGE_ID(SD_MESSAGE_HIBERNATE_KEY), | |
163 | NULL); | |
8e7fd6ad | 164 | return button_handle(b, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true); |
e9d21f24 | 165 | } |
8e7fd6ad | 166 | |
e9d21f24 LP |
167 | } else if (ev.type == EV_SW && ev.value > 0) { |
168 | ||
169 | switch (ev.code) { | |
170 | ||
171 | case SW_LID: | |
c485437f ZJS |
172 | log_struct(LOG_INFO, |
173 | "MESSAGE=Lid closed.", | |
174 | MESSAGE_ID(SD_MESSAGE_LID_CLOSED), | |
175 | NULL); | |
65b51162 LP |
176 | b->lid_close_queued = true; |
177 | ||
178 | return button_handle(b, INHIBIT_HANDLE_LID_SWITCH, b->manager->handle_lid_switch, b->manager->lid_switch_ignore_inhibited, true); | |
179 | } | |
180 | ||
181 | } else if (ev.type == EV_SW && ev.value == 0) { | |
182 | ||
183 | switch (ev.code) { | |
184 | ||
185 | case SW_LID: | |
c485437f ZJS |
186 | log_struct(LOG_INFO, |
187 | "MESSAGE=Lid opened.", | |
188 | MESSAGE_ID(SD_MESSAGE_LID_OPENED), | |
189 | NULL); | |
65b51162 LP |
190 | b->lid_close_queued = false; |
191 | break; | |
e9d21f24 LP |
192 | } |
193 | } | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
cc377381 LP |
198 | int button_open(Button *b) { |
199 | char *p, name[256]; | |
200 | int r; | |
201 | ||
202 | assert(b); | |
203 | ||
204 | if (b->fd >= 0) { | |
205 | close(b->fd); | |
206 | b->fd = -1; | |
207 | } | |
208 | ||
209 | p = strappenda("/dev/input/", b->name); | |
210 | ||
211 | b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); | |
212 | if (b->fd < 0) { | |
213 | log_warning("Failed to open %s: %m", b->name); | |
214 | return -errno; | |
215 | } | |
216 | ||
217 | if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) { | |
218 | log_error("Failed to get input name: %m"); | |
219 | r = -errno; | |
220 | goto fail; | |
221 | } | |
222 | ||
223 | r = sd_event_add_io(b->manager->event, b->fd, EPOLLIN, button_dispatch, b, &b->event_source); | |
224 | if (r < 0) { | |
225 | log_error("Failed to add button event: %s", strerror(-r)); | |
226 | goto fail; | |
227 | } | |
228 | ||
229 | log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name); | |
230 | ||
231 | return 0; | |
232 | ||
233 | fail: | |
234 | close(b->fd); | |
235 | b->fd = -1; | |
236 | return r; | |
237 | } | |
238 | ||
65b51162 LP |
239 | int button_recheck(Button *b) { |
240 | assert(b); | |
241 | ||
242 | if (!b->lid_close_queued) | |
243 | return 0; | |
244 | ||
245 | return button_handle(b, INHIBIT_HANDLE_LID_SWITCH, b->manager->handle_lid_switch, b->manager->lid_switch_ignore_inhibited, false); | |
246 | } |