| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2012 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <assert.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <sys/ioctl.h> |
| #include <unistd.h> |
| #include <linux/input.h> |
| #include <sys/epoll.h> |
| |
| #include "conf-parser.h" |
| #include "util.h" |
| #include "logind-button.h" |
| #include "special.h" |
| #include "dbus-common.h" |
| |
| 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) { |
| free(b); |
| return NULL; |
| } |
| |
| if (hashmap_put(m->buttons, b->name, b) < 0) { |
| free(b->name); |
| free(b); |
| return NULL; |
| } |
| |
| b->manager = m; |
| b->fd = -1; |
| |
| return b; |
| } |
| |
| void button_free(Button *b) { |
| assert(b); |
| |
| hashmap_remove(b->manager->buttons, b->name); |
| |
| if (b->fd >= 0) { |
| hashmap_remove(b->manager->button_fds, INT_TO_PTR(b->fd + 1)); |
| assert_se(epoll_ctl(b->manager->epoll_fd, EPOLL_CTL_DEL, b->fd, NULL) == 0); |
| close_nointr_nofail(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; |
| } |
| |
| int button_open(Button *b) { |
| char name[256], *p; |
| struct epoll_event ev; |
| int r; |
| |
| assert(b); |
| |
| if (b->fd >= 0) { |
| close_nointr_nofail(b->fd); |
| b->fd = -1; |
| } |
| |
| p = strappend("/dev/input/", b->name); |
| if (!p) |
| return log_oom(); |
| |
| b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); |
| free(p); |
| if (b->fd < 0) { |
| log_warning("Failed to open %s: %m", b->name); |
| return -errno; |
| } |
| |
| if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) { |
| log_error("Failed to get input name: %m"); |
| r = -errno; |
| goto fail; |
| } |
| |
| zero(ev); |
| ev.events = EPOLLIN; |
| ev.data.u32 = FD_OTHER_BASE + b->fd; |
| |
| if (epoll_ctl(b->manager->epoll_fd, EPOLL_CTL_ADD, b->fd, &ev) < 0) { |
| log_error("Failed to add to epoll: %m"); |
| r = -errno; |
| goto fail; |
| } |
| |
| r = hashmap_put(b->manager->button_fds, INT_TO_PTR(b->fd + 1), b); |
| if (r < 0) { |
| log_error("Failed to add to hash map: %s", strerror(-r)); |
| assert_se(epoll_ctl(b->manager->epoll_fd, EPOLL_CTL_DEL, b->fd, NULL) == 0); |
| goto fail; |
| } |
| |
| log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name); |
| |
| return 0; |
| |
| fail: |
| close_nointr_nofail(b->fd); |
| b->fd = -1; |
| return r; |
| } |
| |
| static Session *button_get_session(Button *b) { |
| Seat *seat; |
| assert(b); |
| |
| if (!b->seat) |
| return NULL; |
| |
| seat = hashmap_get(b->manager->seats, b->seat); |
| if (!seat) |
| return NULL; |
| |
| return seat->active; |
| } |
| |
| static int button_power_off(Button *b, HandleButton handle) { |
| DBusError error; |
| int r; |
| |
| assert(b); |
| |
| if (handle == HANDLE_OFF) |
| return 0; |
| |
| if (handle == HANDLE_NO_SESSION) { |
| if (hashmap_size(b->manager->sessions) > 0) { |
| log_error("Refusing power-off, user is logged in."); |
| warn_melody(); |
| return -EPERM; |
| } |
| |
| } else if (handle == HANDLE_TTY_SESSION || |
| handle == HANDLE_ANY_SESSION) { |
| unsigned n; |
| Session *s; |
| |
| n = hashmap_size(b->manager->sessions); |
| s = button_get_session(b); |
| |
| /* Silently ignore events of graphical sessions */ |
| if (handle == HANDLE_TTY_SESSION && |
| s && s->type == SESSION_X11) |
| return 0; |
| |
| if (n > 1 || (n == 1 && !s)) { |
| log_error("Refusing power-off, other user is logged in."); |
| warn_melody(); |
| return -EPERM; |
| } |
| |
| } |
| |
| if (handle != HANDLE_ALWAYS) { |
| if (manager_is_inhibited(b->manager, INHIBIT_SHUTDOWN, INHIBIT_BLOCK, NULL)) { |
| log_error("Refusing power-off, shutdown is inhibited."); |
| warn_melody(); |
| return -EPERM; |
| } |
| } |
| |
| log_info("Powering off..."); |
| |
| dbus_error_init(&error); |
| r = bus_manager_shutdown_or_sleep_now_or_later(b->manager, SPECIAL_POWEROFF_TARGET, INHIBIT_SHUTDOWN, &error); |
| if (r < 0) { |
| log_error("Failed to power off: %s", bus_error_message(&error)); |
| dbus_error_free(&error); |
| } |
| |
| return r; |
| } |
| |
| static int button_suspend(Button *b, HandleButton handle) { |
| DBusError error; |
| int r; |
| |
| assert(b); |
| |
| if (handle == HANDLE_OFF) |
| return 0; |
| |
| if (handle == HANDLE_NO_SESSION) { |
| if (hashmap_size(b->manager->sessions) > 0) { |
| log_error("Refusing suspend, user is logged in."); |
| warn_melody(); |
| return -EPERM; |
| } |
| |
| } else if (handle == HANDLE_TTY_SESSION || |
| handle == HANDLE_ANY_SESSION) { |
| unsigned n; |
| Session *s; |
| |
| n = hashmap_size(b->manager->sessions); |
| s = button_get_session(b); |
| |
| /* Silently ignore events of graphical sessions */ |
| if (handle == HANDLE_TTY_SESSION && |
| s && s->type == SESSION_X11) |
| return 0; |
| |
| if (n > 1 || (n == 1 && !s)) { |
| log_error("Refusing suspend, other user is logged in."); |
| warn_melody(); |
| return -EPERM; |
| } |
| } |
| |
| if (handle != HANDLE_ALWAYS) { |
| if (manager_is_inhibited(b->manager, INHIBIT_SLEEP, INHIBIT_BLOCK, NULL)) { |
| log_error("Refusing suspend, sleeping is inhibited."); |
| warn_melody(); |
| return -EPERM; |
| } |
| } |
| |
| log_info("Suspending..."); |
| |
| dbus_error_init(&error); |
| r = bus_manager_shutdown_or_sleep_now_or_later(b->manager, SPECIAL_SUSPEND_TARGET, INHIBIT_SLEEP, &error); |
| if (r < 0) { |
| log_error("Failed to suspend: %s", bus_error_message(&error)); |
| dbus_error_free(&error); |
| } |
| |
| return r; |
| } |
| |
| int button_process(Button *b) { |
| struct input_event ev; |
| ssize_t l; |
| |
| 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_info("Power key pressed."); |
| return button_power_off(b, b->manager->handle_power_key); |
| |
| case KEY_SLEEP: |
| case KEY_SUSPEND: |
| log_info("Sleep key pressed."); |
| return button_suspend(b, b->manager->handle_sleep_key); |
| |
| } |
| } else if (ev.type == EV_SW && ev.value > 0) { |
| |
| switch (ev.code) { |
| |
| case SW_LID: |
| log_info("Lid closed."); |
| return button_suspend(b, b->manager->handle_lid_switch); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static const char* const handle_button_table[_HANDLE_BUTTON_MAX] = { |
| [HANDLE_OFF] = "off", |
| [HANDLE_NO_SESSION] = "no-session", |
| [HANDLE_TTY_SESSION] = "tty-session", |
| [HANDLE_ANY_SESSION] = "any-session", |
| [HANDLE_ALWAYS] = "always" |
| }; |
| DEFINE_STRING_TABLE_LOOKUP(handle_button, HandleButton); |
| DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_button, handle_button, HandleButton, "Failed to parse handle button setting"); |