[thirdparty/systemd.git] / src / login / logind-button.c

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
  Copyright 2012 Lennart Poettering
***/

#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <linux/input.h>

#include "sd-messages.h"

#include "alloc-util.h"
#include "fd-util.h"
#include "logind-button.h"
#include "string-util.h"
#include "util.h"

#define CONST_MAX4(a, b, c, d) CONST_MAX(CONST_MAX(a, b), CONST_MAX(c, d))

#define ULONG_BITS (sizeof(unsigned long)*8)

static bool bitset_get(const unsigned long *bits, unsigned i) {
        return (bits[i / ULONG_BITS] >> (i % ULONG_BITS)) & 1UL;
}

static void bitset_put(unsigned long *bits, unsigned i) {
        bits[i / ULONG_BITS] |= (unsigned long) 1 << (i % ULONG_BITS);
}

Button* button_new(Manager *m, const char *name) {
        Button *b;

        assert(m);
        assert(name);

        b = new0(Button, 1);
        if (!b)
                return NULL;

        b->name = strdup(name);
        if (!b->name)
                return mfree(b);

        if (hashmap_put(m->buttons, b->name, b) < 0) {
                free(b->name);
                return mfree(b);
        }

        b->manager = m;
        b->fd = -1;

        return b;
}

void button_free(Button *b) {
        assert(b);

        hashmap_remove(b->manager->buttons, b->name);

        sd_event_source_unref(b->io_event_source);
        sd_event_source_unref(b->check_event_source);

        if (b->fd >= 0)
                /* If the device has been unplugged close() returns
                 * ENODEV, let's ignore this, hence we don't use
                 * safe_close() */
                (void) close(b->fd);

        free(b->name);
        free(b->seat);
        free(b);
}

int button_set_seat(Button *b, const char *sn) {
        char *s;

        assert(b);
        assert(sn);

        s = strdup(sn);
        if (!s)
                return -ENOMEM;

        free(b->seat);
        b->seat = s;

        return 0;
}

static void button_lid_switch_handle_action(Manager *manager, bool is_edge) {
        HandleAction handle_action;

        assert(manager);

        /* If we are docked or on external power, handle the lid switch
         * differently */
        if (manager_is_docked_or_external_displays(manager))
                handle_action = manager->handle_lid_switch_docked;
        else if (manager->handle_lid_switch_ep != _HANDLE_ACTION_INVALID &&
                 manager_is_on_external_power())
                handle_action = manager->handle_lid_switch_ep;
        else
                handle_action = manager->handle_lid_switch;

        manager_handle_action(manager, INHIBIT_HANDLE_LID_SWITCH, handle_action, manager->lid_switch_ignore_inhibited, is_edge);
}

static int button_recheck(sd_event_source *e, void *userdata) {
        Button *b = userdata;

        assert(b);
        assert(b->lid_closed);

        button_lid_switch_handle_action(b->manager, false);
        return 1;
}

static int button_install_check_event_source(Button *b) {
        int r;
        assert(b);

        /* Install a post handler, so that we keep rechecking as long as the lid is closed. */

        if (b->check_event_source)
                return 0;

        r = sd_event_add_post(b->manager->event, &b->check_event_source, button_recheck, b);
        if (r < 0)
                return r;

        return sd_event_source_set_priority(b->check_event_source, SD_EVENT_PRIORITY_IDLE+1);
}

static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
        Button *b = userdata;
        struct input_event ev;
        ssize_t l;

        assert(s);
        assert(fd == b->fd);
        assert(b);

        l = read(b->fd, &ev, sizeof(ev));
        if (l < 0)
                return errno != EAGAIN ? -errno : 0;
        if ((size_t) l < sizeof(ev))
                return -EIO;

        if (ev.type == EV_KEY && ev.value > 0) {

                switch (ev.code) {

                case KEY_POWER:
                case KEY_POWER2:
                        log_struct(LOG_INFO,
                                   LOG_MESSAGE("Power key pressed."),
                                   "MESSAGE_ID=" SD_MESSAGE_POWER_KEY_STR);

                        manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true);
                        break;

                /* The kernel is a bit confused here:

                   KEY_SLEEP   = suspend-to-ram, which everybody else calls "suspend"
                   KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate"
                */

                case KEY_SLEEP:
                        log_struct(LOG_INFO,
                                   LOG_MESSAGE("Suspend key pressed."),
                                   "MESSAGE_ID=" SD_MESSAGE_SUSPEND_KEY_STR);

                        manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true);
                        break;

                case KEY_SUSPEND:
                        log_struct(LOG_INFO,
                                   LOG_MESSAGE("Hibernate key pressed."),
                                   "MESSAGE_ID=" SD_MESSAGE_HIBERNATE_KEY_STR);

                        manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true);
                        break;
                }

        } else if (ev.type == EV_SW && ev.value > 0) {

                if (ev.code == SW_LID) {
                        log_struct(LOG_INFO,
                                   LOG_MESSAGE("Lid closed."),
                                   "MESSAGE_ID=" SD_MESSAGE_LID_CLOSED_STR);

                        b->lid_closed = true;
                        button_lid_switch_handle_action(b->manager, true);
                        button_install_check_event_source(b);

                } else if (ev.code == SW_DOCK) {
                        log_struct(LOG_INFO,
                                   LOG_MESSAGE("System docked."),
                                   "MESSAGE_ID=" SD_MESSAGE_SYSTEM_DOCKED_STR);

                        b->docked = true;
                }

        } else if (ev.type == EV_SW && ev.value == 0) {

                if (ev.code == SW_LID) {
                        log_struct(LOG_INFO,
                                   LOG_MESSAGE("Lid opened."),
                                   "MESSAGE_ID=" SD_MESSAGE_LID_OPENED_STR);

                        b->lid_closed = false;
                        b->check_event_source = sd_event_source_unref(b->check_event_source);

                } else if (ev.code == SW_DOCK) {
                        log_struct(LOG_INFO,
                                   LOG_MESSAGE("System undocked."),
                                   "MESSAGE_ID=" SD_MESSAGE_SYSTEM_UNDOCKED_STR);

                        b->docked = false;
                }
        }

        return 0;
}

static int button_suitable(Button *b) {
        unsigned long types[CONST_MAX(EV_KEY, EV_SW)/ULONG_BITS+1];

        assert(b);
        assert(b->fd);

        if (ioctl(b->fd, EVIOCGBIT(EV_SYN, sizeof(types)), types) < 0)
                return -errno;

        if (bitset_get(types, EV_KEY)) {
                unsigned long keys[CONST_MAX4(KEY_POWER, KEY_POWER2, KEY_SLEEP, KEY_SUSPEND)/ULONG_BITS+1];

                if (ioctl(b->fd, EVIOCGBIT(EV_KEY, sizeof(keys)), keys) < 0)
                        return -errno;

                if (bitset_get(keys, KEY_POWER) ||
                    bitset_get(keys, KEY_POWER2) ||
                    bitset_get(keys, KEY_SLEEP) ||
                    bitset_get(keys, KEY_SUSPEND))
                        return true;
        }

        if (bitset_get(types, EV_SW)) {
                unsigned long switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1];

                if (ioctl(b->fd, EVIOCGBIT(EV_SW, sizeof(switches)), switches) < 0)
                        return -errno;

                if (bitset_get(switches, SW_LID) ||
                    bitset_get(switches, SW_DOCK))
                        return true;
        }

        return false;
}

static int button_set_mask(Button *b) {
        unsigned long
                types[CONST_MAX(EV_KEY, EV_SW)/ULONG_BITS+1] = {},
                keys[CONST_MAX4(KEY_POWER, KEY_POWER2, KEY_SLEEP, KEY_SUSPEND)/ULONG_BITS+1] = {},
                switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1] = {};
        struct input_mask mask;

        assert(b);
        assert(b->fd >= 0);

        bitset_put(types, EV_KEY);
        bitset_put(types, EV_SW);

        mask = (struct input_mask) {
                .type = EV_SYN,
                .codes_size = sizeof(types),
                .codes_ptr = PTR_TO_UINT64(types),
        };

        if (ioctl(b->fd, EVIOCSMASK, &mask) < 0)
                /* Log only at debug level if the kernel doesn't do EVIOCSMASK yet */
                return log_full_errno(IN_SET(errno, ENOTTY, EOPNOTSUPP, EINVAL) ? LOG_DEBUG : LOG_WARNING,
                                      errno, "Failed to set EV_SYN event mask on /dev/input/%s: %m", b->name);

        bitset_put(keys, KEY_POWER);
        bitset_put(keys, KEY_POWER2);
        bitset_put(keys, KEY_SLEEP);
        bitset_put(keys, KEY_SUSPEND);

        mask = (struct input_mask) {
                .type = EV_KEY,
                .codes_size = sizeof(keys),
                .codes_ptr = PTR_TO_UINT64(keys),
        };

        if (ioctl(b->fd, EVIOCSMASK, &mask) < 0)
                return log_warning_errno(errno, "Failed to set EV_KEY event mask on /dev/input/%s: %m", b->name);

        bitset_put(switches, SW_LID);
        bitset_put(switches, SW_DOCK);

        mask = (struct input_mask) {
                .type = EV_SW,
                .codes_size = sizeof(switches),
                .codes_ptr = PTR_TO_UINT64(switches),
        };

        if (ioctl(b->fd, EVIOCSMASK, &mask) < 0)
                return log_warning_errno(errno, "Failed to set EV_SW event mask on /dev/input/%s: %m", b->name);

        return 0;
}

int button_open(Button *b) {
        char *p, name[256];
        int r;

        assert(b);

        b->fd = safe_close(b->fd);

        p = strjoina("/dev/input/", b->name);

        b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
        if (b->fd < 0)
                return log_warning_errno(errno, "Failed to open %s: %m", p);

        r = button_suitable(b);
        if (r < 0)
                return log_warning_errno(r, "Failed to determine whether input device is relevant to us: %m");
        if (r == 0) {
                log_debug("Device %s does not expose keys or switches relevant to us, ignoring.", p);
                return -EADDRNOTAVAIL;
        }

        if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
                r = log_error_errno(errno, "Failed to get input name: %m");
                goto fail;
        }

        (void) button_set_mask(b);

        r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b);
        if (r < 0) {
                log_error_errno(r, "Failed to add button event: %m");
                goto fail;
        }

        log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name);

        return 0;

fail:
        b->fd = safe_close(b->fd);
        return r;
}

int button_check_switches(Button *b) {
        unsigned long switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1] = {};
        assert(b);

        if (b->fd < 0)
                return -EINVAL;

        if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0)
                return -errno;

        b->lid_closed = bitset_get(switches, SW_LID);
        b->docked = bitset_get(switches, SW_DOCK);

        if (b->lid_closed)
                button_install_check_event_source(b);

        return 0;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
e9d21f24	2	/***
e9d21f24	3	Copyright 2012 Lennart Poettering
e9d21f24 LP	4	***/
e9d21f24 LP	5
e9d21f24 LP	6	#include <errno.h>
e9d21f24 LP	7	#include <fcntl.h>
07630cea	8	#include <string.h>
e9d21f24 LP	9	#include <sys/ioctl.h>
	10	#include <unistd.h>
	11	#include <linux/input.h>
e9d21f24	12
cc377381	13	#include "sd-messages.h"
07630cea	14
b5efdb8a	15	#include "alloc-util.h"
3ffd4af2 LP	16	#include "fd-util.h"
3ffd4af2 LP	17	#include "logind-button.h"
07630cea	18	#include "string-util.h"
e9d21f24	19	#include "util.h"
e9d21f24	20
d5dd44b0 LP	21	#define CONST_MAX4(a, b, c, d) CONST_MAX(CONST_MAX(a, b), CONST_MAX(c, d))
	22
	23	#define ULONG_BITS (sizeof(unsigned long)*8)
	24
	25	static bool bitset_get(const unsigned long *bits, unsigned i) {
	26	return (bits[i / ULONG_BITS] >> (i % ULONG_BITS)) & 1UL;
	27	}
	28
	29	static void bitset_put(unsigned long *bits, unsigned i) {
	30	bits[i / ULONG_BITS] \|= (unsigned long) 1 << (i % ULONG_BITS);
	31	}
	32
e9d21f24 LP	33	Button* button_new(Manager m, const char name) {
	34	Button *b;
	35
	36	assert(m);
	37	assert(name);
	38
	39	b = new0(Button, 1);
	40	if (!b)
	41	return NULL;
	42
	43	b->name = strdup(name);
6b430fdb ZJS	44	if (!b->name)
6b430fdb ZJS	45	return mfree(b);
e9d21f24 LP	46
	47	if (hashmap_put(m->buttons, b->name, b) < 0) {
	48	free(b->name);
6b430fdb	49	return mfree(b);
e9d21f24 LP	50	}
	51
	52	b->manager = m;
	53	b->fd = -1;
	54
	55	return b;
	56	}
	57
	58	void button_free(Button *b) {
	59	assert(b);
	60
	61	hashmap_remove(b->manager->buttons, b->name);
	62
ed4ba7e4 LP	63	sd_event_source_unref(b->io_event_source);
ed4ba7e4 LP	64	sd_event_source_unref(b->check_event_source);
c30a0c62	65
ece174c5	66	if (b->fd >= 0)
c30a0c62 LP	67	/* If the device has been unplugged close() returns
c30a0c62 LP	68	* ENODEV, let's ignore this, hence we don't use
03e334a1	69	* safe_close() */
4fba5796	70	(void) close(b->fd);
e9d21f24 LP	71
	72	free(b->name);
	73	free(b->seat);
	74	free(b);
	75	}
	76
	77	int button_set_seat(Button b, const char sn) {
	78	char *s;
	79
	80	assert(b);
	81	assert(sn);
	82
	83	s = strdup(sn);
	84	if (!s)
	85	return -ENOMEM;
	86
	87	free(b->seat);
	88	b->seat = s;
	89
	90	return 0;
	91	}
	92
3c56cab4 BW	93	static void button_lid_switch_handle_action(Manager *manager, bool is_edge) {
	94	HandleAction handle_action;
	95
	96	assert(manager);
	97
e25937a3 SF	98	/* If we are docked or on external power, handle the lid switch
e25937a3 SF	99	* differently */
602a41c2	100	if (manager_is_docked_or_external_displays(manager))
3c56cab4	101	handle_action = manager->handle_lid_switch_docked;
e25937a3 SF	102	else if (manager->handle_lid_switch_ep != _HANDLE_ACTION_INVALID &&
	103	manager_is_on_external_power())
	104	handle_action = manager->handle_lid_switch_ep;
3c56cab4 BW	105	else
	106	handle_action = manager->handle_lid_switch;
	107
	108	manager_handle_action(manager, INHIBIT_HANDLE_LID_SWITCH, handle_action, manager->lid_switch_ignore_inhibited, is_edge);
	109	}
	110
ed4ba7e4 LP	111	static int button_recheck(sd_event_source e, void userdata) {
ed4ba7e4 LP	112	Button *b = userdata;
beaafb2e	113
ed4ba7e4 LP	114	assert(b);
	115	assert(b->lid_closed);
	116
3c56cab4	117	button_lid_switch_handle_action(b->manager, false);
ed4ba7e4 LP	118	return 1;
ed4ba7e4 LP	119	}
e9d21f24	120
ed4ba7e4 LP	121	static int button_install_check_event_source(Button *b) {
ed4ba7e4 LP	122	int r;
e9d21f24 LP	123	assert(b);
e9d21f24 LP	124
ed4ba7e4	125	/* Install a post handler, so that we keep rechecking as long as the lid is closed. */
6de0e0e5	126
ed4ba7e4 LP	127	if (b->check_event_source)
	128	return 0;
	129
	130	r = sd_event_add_post(b->manager->event, &b->check_event_source, button_recheck, b);
	131	if (r < 0)
	132	return r;
	133
	134	return sd_event_source_set_priority(b->check_event_source, SD_EVENT_PRIORITY_IDLE+1);
e9d21f24 LP	135	}
e9d21f24 LP	136
cc377381 LP	137	static int button_dispatch(sd_event_source s, int fd, uint32_t revents, void userdata) {
cc377381 LP	138	Button *b = userdata;
e9d21f24 LP	139	struct input_event ev;
	140	ssize_t l;
	141
cc377381 LP	142	assert(s);
cc377381 LP	143	assert(fd == b->fd);
e9d21f24 LP	144	assert(b);
	145
	146	l = read(b->fd, &ev, sizeof(ev));
	147	if (l < 0)
	148	return errno != EAGAIN ? -errno : 0;
	149	if ((size_t) l < sizeof(ev))
	150	return -EIO;
	151
e9d21f24 LP	152	if (ev.type == EV_KEY && ev.value > 0) {
	153
	154	switch (ev.code) {
	155
	156	case KEY_POWER:
	157	case KEY_POWER2:
c485437f	158	log_struct(LOG_INFO,
e2cc6eca	159	LOG_MESSAGE("Power key pressed."),
a1230ff9	160	"MESSAGE_ID=" SD_MESSAGE_POWER_KEY_STR);
7b77ed8c	161
ed4ba7e4	162	manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true);
7b77ed8c	163	break;
e9d21f24	164
8e7fd6ad LP	165	/* The kernel is a bit confused here:
	166
	167	KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend"
	168	KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate"
	169	*/
	170
e9d21f24	171	case KEY_SLEEP:
c485437f	172	log_struct(LOG_INFO,
e2cc6eca	173	LOG_MESSAGE("Suspend key pressed."),
a1230ff9	174	"MESSAGE_ID=" SD_MESSAGE_SUSPEND_KEY_STR);
7b77ed8c	175
ed4ba7e4	176	manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true);
7b77ed8c	177	break;
e9d21f24	178
8e7fd6ad	179	case KEY_SUSPEND:
c485437f	180	log_struct(LOG_INFO,
e2cc6eca	181	LOG_MESSAGE("Hibernate key pressed."),
a1230ff9	182	"MESSAGE_ID=" SD_MESSAGE_HIBERNATE_KEY_STR);
7b77ed8c	183
ed4ba7e4	184	manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true);
7b77ed8c	185	break;
e9d21f24	186	}
8e7fd6ad	187
e9d21f24 LP	188	} else if (ev.type == EV_SW && ev.value > 0) {
e9d21f24 LP	189
7b77ed8c	190	if (ev.code == SW_LID) {
c485437f	191	log_struct(LOG_INFO,
e2cc6eca	192	LOG_MESSAGE("Lid closed."),
a1230ff9	193	"MESSAGE_ID=" SD_MESSAGE_LID_CLOSED_STR);
65b51162	194
ed4ba7e4	195	b->lid_closed = true;
3c56cab4	196	button_lid_switch_handle_action(b->manager, true);
ed4ba7e4	197	button_install_check_event_source(b);
2d62c530 LP	198
	199	} else if (ev.code == SW_DOCK) {
	200	log_struct(LOG_INFO,
e2cc6eca	201	LOG_MESSAGE("System docked."),
a1230ff9	202	"MESSAGE_ID=" SD_MESSAGE_SYSTEM_DOCKED_STR);
2d62c530 LP	203
2d62c530 LP	204	b->docked = true;
65b51162 LP	205	}
	206
	207	} else if (ev.type == EV_SW && ev.value == 0) {
	208
7b77ed8c	209	if (ev.code == SW_LID) {
c485437f	210	log_struct(LOG_INFO,
e2cc6eca	211	LOG_MESSAGE("Lid opened."),
a1230ff9	212	"MESSAGE_ID=" SD_MESSAGE_LID_OPENED_STR);
7b77ed8c	213
ed4ba7e4 LP	214	b->lid_closed = false;
ed4ba7e4 LP	215	b->check_event_source = sd_event_source_unref(b->check_event_source);
2d62c530 LP	216
	217	} else if (ev.code == SW_DOCK) {
	218	log_struct(LOG_INFO,
e2cc6eca	219	LOG_MESSAGE("System undocked."),
a1230ff9	220	"MESSAGE_ID=" SD_MESSAGE_SYSTEM_UNDOCKED_STR);
2d62c530 LP	221
2d62c530 LP	222	b->docked = false;
e9d21f24 LP	223	}
	224	}
	225
	226	return 0;
	227	}
	228
2546b70a LP	229	static int button_suitable(Button *b) {
	230	unsigned long types[CONST_MAX(EV_KEY, EV_SW)/ULONG_BITS+1];
	231
	232	assert(b);
	233	assert(b->fd);
	234
	235	if (ioctl(b->fd, EVIOCGBIT(EV_SYN, sizeof(types)), types) < 0)
	236	return -errno;
	237
	238	if (bitset_get(types, EV_KEY)) {
	239	unsigned long keys[CONST_MAX4(KEY_POWER, KEY_POWER2, KEY_SLEEP, KEY_SUSPEND)/ULONG_BITS+1];
	240
	241	if (ioctl(b->fd, EVIOCGBIT(EV_KEY, sizeof(keys)), keys) < 0)
	242	return -errno;
	243
	244	if (bitset_get(keys, KEY_POWER) \|\|
	245	bitset_get(keys, KEY_POWER2) \|\|
	246	bitset_get(keys, KEY_SLEEP) \|\|
	247	bitset_get(keys, KEY_SUSPEND))
	248	return true;
	249	}
	250
	251	if (bitset_get(types, EV_SW)) {
	252	unsigned long switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1];
	253
	254	if (ioctl(b->fd, EVIOCGBIT(EV_SW, sizeof(switches)), switches) < 0)
	255	return -errno;
	256
	257	if (bitset_get(switches, SW_LID) \|\|
	258	bitset_get(switches, SW_DOCK))
	259	return true;
	260	}
	261
	262	return false;
	263	}
	264
d5dd44b0 LP	265	static int button_set_mask(Button *b) {
	266	unsigned long
	267	types[CONST_MAX(EV_KEY, EV_SW)/ULONG_BITS+1] = {},
	268	keys[CONST_MAX4(KEY_POWER, KEY_POWER2, KEY_SLEEP, KEY_SUSPEND)/ULONG_BITS+1] = {},
	269	switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1] = {};
	270	struct input_mask mask;
	271
	272	assert(b);
	273	assert(b->fd >= 0);
	274
	275	bitset_put(types, EV_KEY);
	276	bitset_put(types, EV_SW);
	277
	278	mask = (struct input_mask) {
	279	.type = EV_SYN,
	280	.codes_size = sizeof(types),
	281	.codes_ptr = PTR_TO_UINT64(types),
	282	};
	283
	284	if (ioctl(b->fd, EVIOCSMASK, &mask) < 0)
	285	/* Log only at debug level if the kernel doesn't do EVIOCSMASK yet */
	286	return log_full_errno(IN_SET(errno, ENOTTY, EOPNOTSUPP, EINVAL) ? LOG_DEBUG : LOG_WARNING,
	287	errno, "Failed to set EV_SYN event mask on /dev/input/%s: %m", b->name);
	288
	289	bitset_put(keys, KEY_POWER);
	290	bitset_put(keys, KEY_POWER2);
	291	bitset_put(keys, KEY_SLEEP);
	292	bitset_put(keys, KEY_SUSPEND);
	293
	294	mask = (struct input_mask) {
	295	.type = EV_KEY,
	296	.codes_size = sizeof(keys),
	297	.codes_ptr = PTR_TO_UINT64(keys),
	298	};
	299
	300	if (ioctl(b->fd, EVIOCSMASK, &mask) < 0)
	301	return log_warning_errno(errno, "Failed to set EV_KEY event mask on /dev/input/%s: %m", b->name);
	302
	303	bitset_put(switches, SW_LID);
	304	bitset_put(switches, SW_DOCK);
	305
	306	mask = (struct input_mask) {
	307	.type = EV_SW,
	308	.codes_size = sizeof(switches),
	309	.codes_ptr = PTR_TO_UINT64(switches),
	310	};
	311
	312	if (ioctl(b->fd, EVIOCSMASK, &mask) < 0)
	313	return log_warning_errno(errno, "Failed to set EV_SW event mask on /dev/input/%s: %m", b->name);
	314
	315	return 0;
	316	}
	317
cc377381 LP	318	int button_open(Button *b) {
	319	char *p, name[256];
	320	int r;
	321
	322	assert(b);
	323
7f6e12b0	324	b->fd = safe_close(b->fd);
cc377381	325
63c372cb	326	p = strjoina("/dev/input/", b->name);
cc377381 LP	327
cc377381 LP	328	b->fd = open(p, O_RDWR\|O_CLOEXEC\|O_NOCTTY\|O_NONBLOCK);
4a62c710	329	if (b->fd < 0)
2546b70a LP	330	return log_warning_errno(errno, "Failed to open %s: %m", p);
	331
	332	r = button_suitable(b);
	333	if (r < 0)
	334	return log_warning_errno(r, "Failed to determine whether input device is relevant to us: %m");
	335	if (r == 0) {
	336	log_debug("Device %s does not expose keys or switches relevant to us, ignoring.", p);
	337	return -EADDRNOTAVAIL;
	338	}
cc377381 LP	339
cc377381 LP	340	if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
76ef789d	341	r = log_error_errno(errno, "Failed to get input name: %m");
cc377381 LP	342	goto fail;
	343	}
	344
d5dd44b0 LP	345	(void) button_set_mask(b);
d5dd44b0 LP	346
ed4ba7e4	347	r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b);
cc377381	348	if (r < 0) {
da927ba9	349	log_error_errno(r, "Failed to add button event: %m");
cc377381 LP	350	goto fail;
	351	}
	352
	353	log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name);
	354
	355	return 0;
	356
	357	fail:
66e40583	358	b->fd = safe_close(b->fd);
cc377381 LP	359	return r;
	360	}
	361
2d62c530	362	int button_check_switches(Button *b) {
d5dd44b0	363	unsigned long switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1] = {};
65b51162 LP	364	assert(b);
65b51162 LP	365
ed4ba7e4 LP	366	if (b->fd < 0)
	367	return -EINVAL;
	368
	369	if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0)
	370	return -errno;
65b51162	371
d5dd44b0 LP	372	b->lid_closed = bitset_get(switches, SW_LID);
d5dd44b0 LP	373	b->docked = bitset_get(switches, SW_DOCK);
ed4ba7e4	374
2d62c530	375	if (b->lid_closed)
ed4ba7e4	376	button_install_check_event_source(b);
ed4ba7e4 LP	377
ed4ba7e4 LP	378	return 0;
65b51162	379	}