329 lines
9.1 KiB
C
329 lines
9.1 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 <assert.h>
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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 <sys/epoll.h>
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#include "conf-parser.h"
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#include "util.h"
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#include "logind-button.h"
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#include "special.h"
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#include "dbus-common.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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if (b->fd >= 0) {
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hashmap_remove(b->manager->button_fds, INT_TO_PTR(b->fd + 1));
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assert_se(epoll_ctl(b->manager->epoll_fd, EPOLL_CTL_DEL, b->fd, NULL) == 0);
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close_nointr_nofail(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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int button_open(Button *b) {
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char name[256], *p;
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struct epoll_event ev;
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int r;
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assert(b);
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if (b->fd >= 0) {
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close_nointr_nofail(b->fd);
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b->fd = -1;
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}
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p = strappend("/dev/input/", b->name);
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if (!p)
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return log_oom();
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b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
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free(p);
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if (b->fd < 0) {
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log_warning("Failed to open %s: %m", b->name);
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return -errno;
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}
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if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
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log_error("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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zero(ev);
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ev.events = EPOLLIN;
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ev.data.u32 = FD_OTHER_BASE + b->fd;
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if (epoll_ctl(b->manager->epoll_fd, EPOLL_CTL_ADD, b->fd, &ev) < 0) {
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log_error("Failed to add to epoll: %m");
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r = -errno;
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goto fail;
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}
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r = hashmap_put(b->manager->button_fds, INT_TO_PTR(b->fd + 1), b);
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if (r < 0) {
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log_error("Failed to add to hash map: %s", strerror(-r));
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assert_se(epoll_ctl(b->manager->epoll_fd, EPOLL_CTL_DEL, b->fd, NULL) == 0);
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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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close_nointr_nofail(b->fd);
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b->fd = -1;
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return r;
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}
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static Session *button_get_session(Button *b) {
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Seat *seat;
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assert(b);
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if (!b->seat)
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return NULL;
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seat = hashmap_get(b->manager->seats, b->seat);
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if (!seat)
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return NULL;
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return seat->active;
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}
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static int button_power_off(Button *b, HandleButton handle) {
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DBusError error;
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int r;
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assert(b);
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if (handle == HANDLE_OFF)
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return 0;
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if (handle == HANDLE_NO_SESSION) {
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if (hashmap_size(b->manager->sessions) > 0) {
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log_error("Refusing power-off, user is logged in.");
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warn_melody();
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return -EPERM;
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}
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} else if (handle == HANDLE_TTY_SESSION ||
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handle == HANDLE_ANY_SESSION) {
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unsigned n;
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Session *s;
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n = hashmap_size(b->manager->sessions);
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s = button_get_session(b);
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/* Silently ignore events of graphical sessions */
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if (handle == HANDLE_TTY_SESSION &&
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s && s->type == SESSION_X11)
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return 0;
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if (n > 1 || (n == 1 && !s)) {
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log_error("Refusing power-off, other user is logged in.");
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warn_melody();
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return -EPERM;
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}
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}
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if (handle != HANDLE_ALWAYS) {
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if (manager_is_inhibited(b->manager, INHIBIT_SHUTDOWN, INHIBIT_BLOCK, NULL)) {
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log_error("Refusing power-off, shutdown is inhibited.");
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warn_melody();
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return -EPERM;
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}
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}
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log_info("Powering off...");
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dbus_error_init(&error);
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r = bus_manager_shutdown_or_sleep_now_or_later(b->manager, SPECIAL_POWEROFF_TARGET, INHIBIT_SHUTDOWN, &error);
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if (r < 0) {
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log_error("Failed to power off: %s", bus_error_message(&error));
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dbus_error_free(&error);
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}
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return r;
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}
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static int button_suspend(Button *b, HandleButton handle) {
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DBusError error;
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int r;
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assert(b);
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if (handle == HANDLE_OFF)
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return 0;
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if (handle == HANDLE_NO_SESSION) {
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if (hashmap_size(b->manager->sessions) > 0) {
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log_error("Refusing suspend, user is logged in.");
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warn_melody();
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return -EPERM;
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}
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} else if (handle == HANDLE_TTY_SESSION ||
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handle == HANDLE_ANY_SESSION) {
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unsigned n;
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Session *s;
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n = hashmap_size(b->manager->sessions);
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s = button_get_session(b);
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/* Silently ignore events of graphical sessions */
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if (handle == HANDLE_TTY_SESSION &&
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s && s->type == SESSION_X11)
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return 0;
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if (n > 1 || (n == 1 && !s)) {
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log_error("Refusing suspend, other user is logged in.");
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warn_melody();
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return -EPERM;
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}
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}
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if (handle != HANDLE_ALWAYS) {
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if (manager_is_inhibited(b->manager, INHIBIT_SLEEP, INHIBIT_BLOCK, NULL)) {
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log_error("Refusing suspend, sleeping is inhibited.");
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warn_melody();
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return -EPERM;
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}
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}
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log_info("Suspending...");
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dbus_error_init(&error);
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r = bus_manager_shutdown_or_sleep_now_or_later(b->manager, SPECIAL_SUSPEND_TARGET, INHIBIT_SLEEP, &error);
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if (r < 0) {
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log_error("Failed to suspend: %s", bus_error_message(&error));
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dbus_error_free(&error);
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}
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return r;
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}
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int button_process(Button *b) {
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struct input_event ev;
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ssize_t l;
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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_info("Power key pressed.");
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return button_power_off(b, b->manager->handle_power_key);
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case KEY_SLEEP:
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case KEY_SUSPEND:
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log_info("Sleep key pressed.");
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return button_suspend(b, b->manager->handle_sleep_key);
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}
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} else if (ev.type == EV_SW && ev.value > 0) {
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switch (ev.code) {
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case SW_LID:
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log_info("Lid closed.");
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return button_suspend(b, b->manager->handle_lid_switch);
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}
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}
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return 0;
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}
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static const char* const handle_button_table[_HANDLE_BUTTON_MAX] = {
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[HANDLE_OFF] = "off",
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[HANDLE_NO_SESSION] = "no-session",
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[HANDLE_TTY_SESSION] = "tty-session",
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[HANDLE_ANY_SESSION] = "any-session",
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[HANDLE_ALWAYS] = "always"
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};
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DEFINE_STRING_TABLE_LOOKUP(handle_button, HandleButton);
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DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_button, handle_button, HandleButton, "Failed to parse handle button setting");
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