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

/* SPDX-License-Identifier: LGPL-2.1+ */

#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 "missing_input.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(int fd) {
        unsigned long types[CONST_MAX(EV_KEY, EV_SW)/ULONG_BITS+1];

        assert(fd >= 0);

        if (ioctl(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(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(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(const char *name, int fd) {
        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(name);
        assert(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(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", 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(fd, EVIOCSMASK, &mask) < 0)
                return log_warning_errno(errno, "Failed to set EV_KEY event mask on /dev/input/%s: %m", 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(fd, EVIOCSMASK, &mask) < 0)
                return log_warning_errno(errno, "Failed to set EV_SW event mask on /dev/input/%s: %m", name);

        return 0;
}

int button_open(Button *b) {
        _cleanup_close_ int fd = -1;
        const char *p;
        char name[256];
        int r;

        assert(b);

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

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

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

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

        if (ioctl(fd, EVIOCGNAME(sizeof name), name) < 0)
                return log_error_errno(errno, "Failed to get input name for %s: %m", p);

        (void) button_set_mask(b->name, fd);
        
        b->io_event_source = sd_event_source_unref(b->io_event_source);
        r = sd_event_add_io(b->manager->event, &b->io_event_source, fd, EPOLLIN, button_dispatch, b);
        if (r < 0)
                return log_error_errno(r, "Failed to add button event for %s: %m", p);

        b->fd = TAKE_FD(fd);
        log_info("Watching system buttons on %s (%s)", p, name);
        return 0;
}

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 LP	3	#include <errno.h>
e9d21f24 LP	4	#include <fcntl.h>
07630cea	5	#include <string.h>
e9d21f24 LP	6	#include <sys/ioctl.h>
	7	#include <unistd.h>
	8	#include <linux/input.h>
e9d21f24	9
cc377381	10	#include "sd-messages.h"
07630cea	11
b5efdb8a	12	#include "alloc-util.h"
3ffd4af2 LP	13	#include "fd-util.h"
3ffd4af2 LP	14	#include "logind-button.h"
36dd5ffd	15	#include "missing_input.h"
07630cea	16	#include "string-util.h"
e9d21f24	17	#include "util.h"
e9d21f24	18
d5dd44b0 LP	19	#define CONST_MAX4(a, b, c, d) CONST_MAX(CONST_MAX(a, b), CONST_MAX(c, d))
	20
	21	#define ULONG_BITS (sizeof(unsigned long)*8)
	22
	23	static bool bitset_get(const unsigned long *bits, unsigned i) {
	24	return (bits[i / ULONG_BITS] >> (i % ULONG_BITS)) & 1UL;
	25	}
	26
	27	static void bitset_put(unsigned long *bits, unsigned i) {
	28	bits[i / ULONG_BITS] \|= (unsigned long) 1 << (i % ULONG_BITS);
	29	}
	30
e9d21f24 LP	31	Button* button_new(Manager m, const char name) {
	32	Button *b;
	33
	34	assert(m);
	35	assert(name);
	36
	37	b = new0(Button, 1);
	38	if (!b)
	39	return NULL;
	40
	41	b->name = strdup(name);
6b430fdb ZJS	42	if (!b->name)
6b430fdb ZJS	43	return mfree(b);
e9d21f24 LP	44
	45	if (hashmap_put(m->buttons, b->name, b) < 0) {
	46	free(b->name);
6b430fdb	47	return mfree(b);
e9d21f24 LP	48	}
	49
	50	b->manager = m;
	51	b->fd = -1;
	52
	53	return b;
	54	}
	55
	56	void button_free(Button *b) {
	57	assert(b);
	58
	59	hashmap_remove(b->manager->buttons, b->name);
	60
ed4ba7e4 LP	61	sd_event_source_unref(b->io_event_source);
ed4ba7e4 LP	62	sd_event_source_unref(b->check_event_source);
c30a0c62	63
ece174c5	64	if (b->fd >= 0)
c30a0c62 LP	65	/* If the device has been unplugged close() returns
c30a0c62 LP	66	* ENODEV, let's ignore this, hence we don't use
03e334a1	67	* safe_close() */
4fba5796	68	(void) close(b->fd);
e9d21f24 LP	69
	70	free(b->name);
	71	free(b->seat);
	72	free(b);
	73	}
	74
	75	int button_set_seat(Button b, const char sn) {
	76	char *s;
	77
	78	assert(b);
	79	assert(sn);
	80
	81	s = strdup(sn);
	82	if (!s)
	83	return -ENOMEM;
	84
	85	free(b->seat);
	86	b->seat = s;
	87
	88	return 0;
	89	}
	90
3c56cab4 BW	91	static void button_lid_switch_handle_action(Manager *manager, bool is_edge) {
	92	HandleAction handle_action;
	93
	94	assert(manager);
	95
e25937a3 SF	96	/* If we are docked or on external power, handle the lid switch
e25937a3 SF	97	* differently */
602a41c2	98	if (manager_is_docked_or_external_displays(manager))
3c56cab4	99	handle_action = manager->handle_lid_switch_docked;
e25937a3 SF	100	else if (manager->handle_lid_switch_ep != _HANDLE_ACTION_INVALID &&
	101	manager_is_on_external_power())
	102	handle_action = manager->handle_lid_switch_ep;
3c56cab4 BW	103	else
	104	handle_action = manager->handle_lid_switch;
	105
	106	manager_handle_action(manager, INHIBIT_HANDLE_LID_SWITCH, handle_action, manager->lid_switch_ignore_inhibited, is_edge);
	107	}
	108
ed4ba7e4 LP	109	static int button_recheck(sd_event_source e, void userdata) {
ed4ba7e4 LP	110	Button *b = userdata;
beaafb2e	111
ed4ba7e4 LP	112	assert(b);
	113	assert(b->lid_closed);
	114
3c56cab4	115	button_lid_switch_handle_action(b->manager, false);
ed4ba7e4 LP	116	return 1;
ed4ba7e4 LP	117	}
e9d21f24	118
ed4ba7e4 LP	119	static int button_install_check_event_source(Button *b) {
ed4ba7e4 LP	120	int r;
e9d21f24 LP	121	assert(b);
e9d21f24 LP	122
ed4ba7e4	123	/* Install a post handler, so that we keep rechecking as long as the lid is closed. */
6de0e0e5	124
ed4ba7e4 LP	125	if (b->check_event_source)
	126	return 0;
	127
	128	r = sd_event_add_post(b->manager->event, &b->check_event_source, button_recheck, b);
	129	if (r < 0)
	130	return r;
	131
	132	return sd_event_source_set_priority(b->check_event_source, SD_EVENT_PRIORITY_IDLE+1);
e9d21f24 LP	133	}
e9d21f24 LP	134
cc377381 LP	135	static int button_dispatch(sd_event_source s, int fd, uint32_t revents, void userdata) {
cc377381 LP	136	Button *b = userdata;
e9d21f24 LP	137	struct input_event ev;
	138	ssize_t l;
	139
cc377381 LP	140	assert(s);
cc377381 LP	141	assert(fd == b->fd);
e9d21f24 LP	142	assert(b);
	143
	144	l = read(b->fd, &ev, sizeof(ev));
	145	if (l < 0)
	146	return errno != EAGAIN ? -errno : 0;
	147	if ((size_t) l < sizeof(ev))
	148	return -EIO;
	149
e9d21f24 LP	150	if (ev.type == EV_KEY && ev.value > 0) {
	151
	152	switch (ev.code) {
	153
	154	case KEY_POWER:
	155	case KEY_POWER2:
c485437f	156	log_struct(LOG_INFO,
e2cc6eca	157	LOG_MESSAGE("Power key pressed."),
a1230ff9	158	"MESSAGE_ID=" SD_MESSAGE_POWER_KEY_STR);
7b77ed8c	159
ed4ba7e4	160	manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true);
7b77ed8c	161	break;
e9d21f24	162
8e7fd6ad LP	163	/* The kernel is a bit confused here:
	164
	165	KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend"
	166	KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate"
	167	*/
	168
e9d21f24	169	case KEY_SLEEP:
c485437f	170	log_struct(LOG_INFO,
e2cc6eca	171	LOG_MESSAGE("Suspend key pressed."),
a1230ff9	172	"MESSAGE_ID=" SD_MESSAGE_SUSPEND_KEY_STR);
7b77ed8c	173
ed4ba7e4	174	manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true);
7b77ed8c	175	break;
e9d21f24	176
8e7fd6ad	177	case KEY_SUSPEND:
c485437f	178	log_struct(LOG_INFO,
e2cc6eca	179	LOG_MESSAGE("Hibernate key pressed."),
a1230ff9	180	"MESSAGE_ID=" SD_MESSAGE_HIBERNATE_KEY_STR);
7b77ed8c	181
ed4ba7e4	182	manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true);
7b77ed8c	183	break;
e9d21f24	184	}
8e7fd6ad	185
e9d21f24 LP	186	} else if (ev.type == EV_SW && ev.value > 0) {
e9d21f24 LP	187
7b77ed8c	188	if (ev.code == SW_LID) {
c485437f	189	log_struct(LOG_INFO,
e2cc6eca	190	LOG_MESSAGE("Lid closed."),
a1230ff9	191	"MESSAGE_ID=" SD_MESSAGE_LID_CLOSED_STR);
65b51162	192
ed4ba7e4	193	b->lid_closed = true;
3c56cab4	194	button_lid_switch_handle_action(b->manager, true);
ed4ba7e4	195	button_install_check_event_source(b);
2d62c530 LP	196
	197	} else if (ev.code == SW_DOCK) {
	198	log_struct(LOG_INFO,
e2cc6eca	199	LOG_MESSAGE("System docked."),
a1230ff9	200	"MESSAGE_ID=" SD_MESSAGE_SYSTEM_DOCKED_STR);
2d62c530 LP	201
2d62c530 LP	202	b->docked = true;
65b51162 LP	203	}
	204
	205	} else if (ev.type == EV_SW && ev.value == 0) {
	206
7b77ed8c	207	if (ev.code == SW_LID) {
c485437f	208	log_struct(LOG_INFO,
e2cc6eca	209	LOG_MESSAGE("Lid opened."),
a1230ff9	210	"MESSAGE_ID=" SD_MESSAGE_LID_OPENED_STR);
7b77ed8c	211
ed4ba7e4 LP	212	b->lid_closed = false;
ed4ba7e4 LP	213	b->check_event_source = sd_event_source_unref(b->check_event_source);
2d62c530 LP	214
	215	} else if (ev.code == SW_DOCK) {
	216	log_struct(LOG_INFO,
e2cc6eca	217	LOG_MESSAGE("System undocked."),
a1230ff9	218	"MESSAGE_ID=" SD_MESSAGE_SYSTEM_UNDOCKED_STR);
2d62c530 LP	219
2d62c530 LP	220	b->docked = false;
e9d21f24 LP	221	}
	222	}
	223
	224	return 0;
	225	}
	226
92c60579	227	static int button_suitable(int fd) {
2546b70a LP	228	unsigned long types[CONST_MAX(EV_KEY, EV_SW)/ULONG_BITS+1];
2546b70a LP	229
92c60579	230	assert(fd >= 0);
2546b70a	231
92c60579	232	if (ioctl(fd, EVIOCGBIT(EV_SYN, sizeof types), types) < 0)
2546b70a LP	233	return -errno;
	234
	235	if (bitset_get(types, EV_KEY)) {
	236	unsigned long keys[CONST_MAX4(KEY_POWER, KEY_POWER2, KEY_SLEEP, KEY_SUSPEND)/ULONG_BITS+1];
	237
92c60579	238	if (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof keys), keys) < 0)
2546b70a LP	239	return -errno;
	240
	241	if (bitset_get(keys, KEY_POWER) \|\|
	242	bitset_get(keys, KEY_POWER2) \|\|
	243	bitset_get(keys, KEY_SLEEP) \|\|
	244	bitset_get(keys, KEY_SUSPEND))
	245	return true;
	246	}
	247
	248	if (bitset_get(types, EV_SW)) {
	249	unsigned long switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1];
	250
92c60579	251	if (ioctl(fd, EVIOCGBIT(EV_SW, sizeof switches), switches) < 0)
2546b70a LP	252	return -errno;
	253
	254	if (bitset_get(switches, SW_LID) \|\|
	255	bitset_get(switches, SW_DOCK))
	256	return true;
	257	}
	258
	259	return false;
	260	}
	261
92c60579	262	static int button_set_mask(const char *name, int fd) {
d5dd44b0 LP	263	unsigned long
	264	types[CONST_MAX(EV_KEY, EV_SW)/ULONG_BITS+1] = {},
	265	keys[CONST_MAX4(KEY_POWER, KEY_POWER2, KEY_SLEEP, KEY_SUSPEND)/ULONG_BITS+1] = {},
	266	switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1] = {};
	267	struct input_mask mask;
	268
92c60579 ZJS	269	assert(name);
92c60579 ZJS	270	assert(fd >= 0);
d5dd44b0 LP	271
	272	bitset_put(types, EV_KEY);
	273	bitset_put(types, EV_SW);
	274
	275	mask = (struct input_mask) {
	276	.type = EV_SYN,
	277	.codes_size = sizeof(types),
	278	.codes_ptr = PTR_TO_UINT64(types),
	279	};
	280
92c60579	281	if (ioctl(fd, EVIOCSMASK, &mask) < 0)
d5dd44b0 LP	282	/* Log only at debug level if the kernel doesn't do EVIOCSMASK yet */
d5dd44b0 LP	283	return log_full_errno(IN_SET(errno, ENOTTY, EOPNOTSUPP, EINVAL) ? LOG_DEBUG : LOG_WARNING,
92c60579	284	errno, "Failed to set EV_SYN event mask on /dev/input/%s: %m", name);
d5dd44b0 LP	285
	286	bitset_put(keys, KEY_POWER);
	287	bitset_put(keys, KEY_POWER2);
	288	bitset_put(keys, KEY_SLEEP);
	289	bitset_put(keys, KEY_SUSPEND);
	290
	291	mask = (struct input_mask) {
	292	.type = EV_KEY,
	293	.codes_size = sizeof(keys),
	294	.codes_ptr = PTR_TO_UINT64(keys),
	295	};
	296
92c60579 ZJS	297	if (ioctl(fd, EVIOCSMASK, &mask) < 0)
92c60579 ZJS	298	return log_warning_errno(errno, "Failed to set EV_KEY event mask on /dev/input/%s: %m", name);
d5dd44b0 LP	299
	300	bitset_put(switches, SW_LID);
	301	bitset_put(switches, SW_DOCK);
	302
	303	mask = (struct input_mask) {
	304	.type = EV_SW,
	305	.codes_size = sizeof(switches),
	306	.codes_ptr = PTR_TO_UINT64(switches),
	307	};
	308
92c60579 ZJS	309	if (ioctl(fd, EVIOCSMASK, &mask) < 0)
92c60579 ZJS	310	return log_warning_errno(errno, "Failed to set EV_SW event mask on /dev/input/%s: %m", name);
d5dd44b0 LP	311
	312	return 0;
	313	}
	314
cc377381	315	int button_open(Button *b) {
92c60579 ZJS	316	_cleanup_close_ int fd = -1;
	317	const char *p;
	318	char name[256];
cc377381 LP	319	int r;
	320
	321	assert(b);
	322
7f6e12b0	323	b->fd = safe_close(b->fd);
cc377381	324
63c372cb	325	p = strjoina("/dev/input/", b->name);
cc377381	326
92c60579 ZJS	327	fd = open(p, O_RDWR\|O_CLOEXEC\|O_NOCTTY\|O_NONBLOCK);
92c60579 ZJS	328	if (fd < 0)
2546b70a LP	329	return log_warning_errno(errno, "Failed to open %s: %m", p);
2546b70a LP	330
92c60579	331	r = button_suitable(fd);
2546b70a	332	if (r < 0)
92c60579	333	return log_warning_errno(r, "Failed to determine whether input device %s is relevant to us: %m", p);
baaa35ad ZJS	334	if (r == 0)
baaa35ad ZJS	335	return log_debug_errno(SYNTHETIC_ERRNO(EADDRNOTAVAIL),
92c60579	336	"Device %s does not expose keys or switches relevant to us, ignoring.", p);
cc377381	337
92c60579 ZJS	338	if (ioctl(fd, EVIOCGNAME(sizeof name), name) < 0)
92c60579 ZJS	339	return log_error_errno(errno, "Failed to get input name for %s: %m", p);
cc377381	340
92c60579	341	(void) button_set_mask(b->name, fd);
b2774a3a	342
b2774a3a	343	b->io_event_source = sd_event_source_unref(b->io_event_source);
12e98242	344	r = sd_event_add_io(b->manager->event, &b->io_event_source, fd, EPOLLIN, button_dispatch, b);
92c60579 ZJS	345	if (r < 0)
92c60579 ZJS	346	return log_error_errno(r, "Failed to add button event for %s: %m", p);
cc377381	347
92c60579 ZJS	348	b->fd = TAKE_FD(fd);
92c60579 ZJS	349	log_info("Watching system buttons on %s (%s)", p, name);
cc377381	350	return 0;
cc377381 LP	351	}
cc377381 LP	352
2d62c530	353	int button_check_switches(Button *b) {
d5dd44b0	354	unsigned long switches[CONST_MAX(SW_LID, SW_DOCK)/ULONG_BITS+1] = {};
65b51162 LP	355	assert(b);
65b51162 LP	356
ed4ba7e4 LP	357	if (b->fd < 0)
	358	return -EINVAL;
	359
	360	if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0)
	361	return -errno;
65b51162	362
d5dd44b0 LP	363	b->lid_closed = bitset_get(switches, SW_LID);
d5dd44b0 LP	364	b->docked = bitset_get(switches, SW_DOCK);
ed4ba7e4	365
2d62c530	366	if (b->lid_closed)
ed4ba7e4	367	button_install_check_event_source(b);
ed4ba7e4 LP	368
ed4ba7e4 LP	369	return 0;
65b51162	370	}