291 lines
8.7 KiB
C
291 lines
8.7 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <linux/input.h>
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#include "sd-messages.h"
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#include "util.h"
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#include "logind-button.h"
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Button* button_new(Manager *m, const char *name) {
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Button *b;
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assert(m);
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assert(name);
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b = new0(Button, 1);
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if (!b)
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return NULL;
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b->name = strdup(name);
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if (!b->name) {
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free(b);
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return NULL;
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}
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if (hashmap_put(m->buttons, b->name, b) < 0) {
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free(b->name);
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free(b);
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return NULL;
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}
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b->manager = m;
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b->fd = -1;
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return b;
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}
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void button_free(Button *b) {
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assert(b);
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hashmap_remove(b->manager->buttons, b->name);
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sd_event_source_unref(b->io_event_source);
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sd_event_source_unref(b->check_event_source);
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if (b->fd >= 0) {
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/* If the device has been unplugged close() returns
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* ENODEV, let's ignore this, hence we don't use
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* safe_close() */
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(void) close(b->fd);
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}
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free(b->name);
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free(b->seat);
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free(b);
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}
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int button_set_seat(Button *b, const char *sn) {
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char *s;
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assert(b);
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assert(sn);
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s = strdup(sn);
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if (!s)
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return -ENOMEM;
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free(b->seat);
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b->seat = s;
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return 0;
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}
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static void button_lid_switch_handle_action(Manager *manager, bool is_edge) {
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HandleAction handle_action;
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assert(manager);
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/* If we are docked, handle the lid switch differently */
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if (manager_is_docked_or_external_displays(manager))
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handle_action = manager->handle_lid_switch_docked;
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else
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handle_action = manager->handle_lid_switch;
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manager_handle_action(manager, INHIBIT_HANDLE_LID_SWITCH, handle_action, manager->lid_switch_ignore_inhibited, is_edge);
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}
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static int button_recheck(sd_event_source *e, void *userdata) {
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Button *b = userdata;
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assert(b);
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assert(b->lid_closed);
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button_lid_switch_handle_action(b->manager, false);
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return 1;
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}
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static int button_install_check_event_source(Button *b) {
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int r;
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assert(b);
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/* Install a post handler, so that we keep rechecking as long as the lid is closed. */
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if (b->check_event_source)
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return 0;
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r = sd_event_add_post(b->manager->event, &b->check_event_source, button_recheck, b);
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if (r < 0)
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return r;
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return sd_event_source_set_priority(b->check_event_source, SD_EVENT_PRIORITY_IDLE+1);
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}
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static int button_dispatch(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
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Button *b = userdata;
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struct input_event ev;
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ssize_t l;
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assert(s);
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assert(fd == b->fd);
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assert(b);
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l = read(b->fd, &ev, sizeof(ev));
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if (l < 0)
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return errno != EAGAIN ? -errno : 0;
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if ((size_t) l < sizeof(ev))
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return -EIO;
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if (ev.type == EV_KEY && ev.value > 0) {
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switch (ev.code) {
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case KEY_POWER:
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case KEY_POWER2:
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log_struct(LOG_INFO,
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LOG_MESSAGE("Power key pressed."),
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LOG_MESSAGE_ID(SD_MESSAGE_POWER_KEY),
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NULL);
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manager_handle_action(b->manager, INHIBIT_HANDLE_POWER_KEY, b->manager->handle_power_key, b->manager->power_key_ignore_inhibited, true);
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break;
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/* The kernel is a bit confused here:
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KEY_SLEEP = suspend-to-ram, which everybody else calls "suspend"
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KEY_SUSPEND = suspend-to-disk, which everybody else calls "hibernate"
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*/
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case KEY_SLEEP:
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log_struct(LOG_INFO,
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LOG_MESSAGE("Suspend key pressed."),
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LOG_MESSAGE_ID(SD_MESSAGE_SUSPEND_KEY),
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NULL);
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manager_handle_action(b->manager, INHIBIT_HANDLE_SUSPEND_KEY, b->manager->handle_suspend_key, b->manager->suspend_key_ignore_inhibited, true);
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break;
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case KEY_SUSPEND:
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log_struct(LOG_INFO,
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LOG_MESSAGE("Hibernate key pressed."),
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LOG_MESSAGE_ID(SD_MESSAGE_HIBERNATE_KEY),
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NULL);
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manager_handle_action(b->manager, INHIBIT_HANDLE_HIBERNATE_KEY, b->manager->handle_hibernate_key, b->manager->hibernate_key_ignore_inhibited, true);
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break;
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}
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} else if (ev.type == EV_SW && ev.value > 0) {
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if (ev.code == SW_LID) {
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log_struct(LOG_INFO,
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LOG_MESSAGE("Lid closed."),
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LOG_MESSAGE_ID(SD_MESSAGE_LID_CLOSED),
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NULL);
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b->lid_closed = true;
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button_lid_switch_handle_action(b->manager, true);
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button_install_check_event_source(b);
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} else if (ev.code == SW_DOCK) {
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log_struct(LOG_INFO,
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LOG_MESSAGE("System docked."),
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LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_DOCKED),
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NULL);
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b->docked = true;
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}
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} else if (ev.type == EV_SW && ev.value == 0) {
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if (ev.code == SW_LID) {
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log_struct(LOG_INFO,
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LOG_MESSAGE("Lid opened."),
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LOG_MESSAGE_ID(SD_MESSAGE_LID_OPENED),
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NULL);
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b->lid_closed = false;
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b->check_event_source = sd_event_source_unref(b->check_event_source);
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} else if (ev.code == SW_DOCK) {
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log_struct(LOG_INFO,
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LOG_MESSAGE("System undocked."),
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LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_UNDOCKED),
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NULL);
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b->docked = false;
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}
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}
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return 0;
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}
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int button_open(Button *b) {
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char *p, name[256];
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int r;
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assert(b);
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if (b->fd >= 0) {
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b->fd = safe_close(b->fd);
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}
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p = strjoina("/dev/input/", b->name);
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b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
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if (b->fd < 0)
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return log_warning_errno(errno, "Failed to open %s: %m", b->name);
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if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
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log_error_errno(errno, "Failed to get input name: %m");
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r = -errno;
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goto fail;
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}
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r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b);
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if (r < 0) {
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log_error_errno(r, "Failed to add button event: %m");
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goto fail;
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}
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log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name);
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return 0;
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fail:
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b->fd = safe_close(b->fd);
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return r;
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}
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int button_check_switches(Button *b) {
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uint8_t switches[SW_MAX/8+1] = {};
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assert(b);
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if (b->fd < 0)
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return -EINVAL;
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if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0)
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return -errno;
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b->lid_closed = (switches[SW_LID/8] >> (SW_LID % 8)) & 1;
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b->docked = (switches[SW_DOCK/8] >> (SW_DOCK % 8)) & 1;
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if (b->lid_closed)
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button_install_check_event_source(b);
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return 0;
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}
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