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-rw-r--r--src/login/logind-button.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/src/login/logind-button.c b/src/login/logind-button.c
new file mode 100644
index 0000000000..48432e195d
--- /dev/null
+++ b/src/login/logind-button.c
@@ -0,0 +1,295 @@
+/*-*- 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) {
+ log_error("Out of memory");
+ return -ENOMEM;
+ }
+
+ 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 bool has_graphical_session(Manager *m, const char *seat) {
+ Seat *s;
+
+ assert(m);
+ assert(seat);
+
+ s = hashmap_get(m->seats, seat);
+ if (!s)
+ return false;
+
+ if (!s->active)
+ return false;
+
+ return s->active->type == SESSION_X11;
+}
+
+static int button_power_off(Button *b, HandleButton handle) {
+ DBusError error;
+ int r;
+
+ assert(b);
+
+ if (handle == HANDLE_NO)
+ return 0;
+
+ if (handle != HANDLE_ALWAYS) {
+
+ if (hashmap_size(b->manager->sessions) > 0) {
+ log_error("Refusing power-off, user is logged in.");
+ warn_melody();
+ return -EPERM;
+ }
+
+ 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_NO)
+ return 0;
+
+ if (handle != HANDLE_ALWAYS) {
+
+ if (hashmap_size(b->manager->sessions) > 0) {
+ log_error("Refusing suspend, user is logged in.");
+ warn_melody();
+ return -EPERM;
+ }
+
+ 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 there's a graphical session on the seat this device
+ * belongs to we ignore events, it is job of the graphical
+ * session to handle the event. */
+ if (has_graphical_session(b->manager, b->seat))
+ return 0;
+
+ 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_YES] = "yes",
+ [HANDLE_NO] = "no",
+ [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");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-10 19:51:26 +0000