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Diffstat (limited to 'src/grp-login/systemd-logind/logind-button.c')
-rw-r--r--src/grp-login/systemd-logind/logind-button.c288
1 files changed, 288 insertions, 0 deletions
diff --git a/src/grp-login/systemd-logind/logind-button.c b/src/grp-login/systemd-logind/logind-button.c
new file mode 100644
index 0000000000..acf7504a2e
--- /dev/null
+++ b/src/grp-login/systemd-logind/logind-button.c
@@ -0,0 +1,288 @@
+/***
+ 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 <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <linux/input.h>
+
+#include <systemd/sd-messages.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "logind-button.h"
+#include "string-util.h"
+#include "util.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);
+
+ 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, handle the lid switch differently */
+ if (manager_is_docked_or_external_displays(manager))
+ handle_action = manager->handle_lid_switch_docked;
+ 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."),
+ LOG_MESSAGE_ID(SD_MESSAGE_POWER_KEY),
+ NULL);
+
+ 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."),
+ LOG_MESSAGE_ID(SD_MESSAGE_SUSPEND_KEY),
+ NULL);
+
+ 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."),
+ LOG_MESSAGE_ID(SD_MESSAGE_HIBERNATE_KEY),
+ NULL);
+
+ 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."),
+ LOG_MESSAGE_ID(SD_MESSAGE_LID_CLOSED),
+ NULL);
+
+ 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."),
+ LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_DOCKED),
+ NULL);
+
+ 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."),
+ LOG_MESSAGE_ID(SD_MESSAGE_LID_OPENED),
+ NULL);
+
+ 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."),
+ LOG_MESSAGE_ID(SD_MESSAGE_SYSTEM_UNDOCKED),
+ NULL);
+
+ b->docked = false;
+ }
+ }
+
+ return 0;
+}
+
+int button_open(Button *b) {
+ char *p, name[256];
+ int r;
+
+ assert(b);
+
+ b->fd = safe_close(b->fd);
+
+ p = strjoina("/dev/input/", b->name);
+
+ b->fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
+ if (b->fd < 0)
+ return log_warning_errno(errno, "Failed to open %s: %m", b->name);
+
+ if (ioctl(b->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
+ r = log_error_errno(errno, "Failed to get input name: %m");
+ goto fail;
+ }
+
+ r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b);
+ if (r < 0) {
+ log_error_errno(r, "Failed to add button event: %m");
+ goto fail;
+ }
+
+ log_info("Watching system buttons on /dev/input/%s (%s)", b->name, name);
+
+ return 0;
+
+fail:
+ b->fd = safe_close(b->fd);
+ return r;
+}
+
+int button_check_switches(Button *b) {
+ uint8_t switches[SW_MAX/8+1] = {};
+ assert(b);
+
+ if (b->fd < 0)
+ return -EINVAL;
+
+ if (ioctl(b->fd, EVIOCGSW(sizeof(switches)), switches) < 0)
+ return -errno;
+
+ b->lid_closed = (switches[SW_LID/8] >> (SW_LID % 8)) & 1;
+ b->docked = (switches[SW_DOCK/8] >> (SW_DOCK % 8)) & 1;
+
+ if (b->lid_closed)
+ button_install_check_event_source(b);
+
+ return 0;
+}
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