sway/swayidle/main.c

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#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
#include <wayland-client-protocol.h>
#include <wayland-client.h>
#include <wayland-server.h>
#include <wayland-util.h>
#include <wlr/config.h>
#include <wlr/util/log.h>
#include "config.h"
#include "idle-client-protocol.h"
#include "list.h"
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#if HAVE_SYSTEMD
#include <systemd/sd-bus.h>
#include <systemd/sd-login.h>
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#elif HAVE_ELOGIND
#include <elogind/sd-bus.h>
#include <elogind/sd-login.h>
#endif
static struct org_kde_kwin_idle *idle_manager = NULL;
static struct wl_seat *seat = NULL;
struct swayidle_state {
struct wl_display *display;
struct wl_event_loop *event_loop;
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list_t *timeout_cmds; // struct swayidle_timeout_cmd *
char *lock_cmd;
} state;
struct swayidle_timeout_cmd {
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int timeout, registered_timeout;
struct org_kde_kwin_idle_timeout *idle_timer;
char *idle_cmd;
char *resume_cmd;
};
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void sway_terminate(int exit_code) {
wl_display_disconnect(state.display);
wl_event_loop_destroy(state.event_loop);
exit(exit_code);
}
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static void cmd_exec(char *param) {
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wlr_log(WLR_DEBUG, "Cmd exec %s", param);
pid_t pid = fork();
if (pid == 0) {
pid = fork();
if (pid == 0) {
char *const cmd[] = { "sh", "-c", param, NULL, };
execvp(cmd[0], cmd);
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wlr_log_errno(WLR_ERROR, "execve failed!");
exit(1);
} else if (pid < 0) {
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wlr_log_errno(WLR_ERROR, "fork failed");
exit(1);
}
exit(0);
} else if (pid < 0) {
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wlr_log_errno(WLR_ERROR, "fork failed");
} else {
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wlr_log(WLR_DEBUG, "Spawned process %s", param);
waitpid(pid, NULL, 0);
}
}
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#if HAVE_SYSTEMD || HAVE_ELOGIND
static int lock_fd = -1;
static int ongoing_fd = -1;
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static struct sd_bus *bus = NULL;
static int release_lock(void *data) {
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wlr_log(WLR_INFO, "Releasing sleep lock %d", ongoing_fd);
if (ongoing_fd >= 0) {
close(ongoing_fd);
}
ongoing_fd = -1;
return 0;
}
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static void acquire_sleep_lock(void) {
sd_bus_message *msg = NULL;
sd_bus_error error = SD_BUS_ERROR_NULL;
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int ret = sd_bus_call_method(bus, "org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager", "Inhibit",
&error, &msg, "ssss", "sleep", "swayidle",
"Setup Up Lock Screen", "delay");
if (ret < 0) {
wlr_log(WLR_ERROR, "Failed to send Inhibit signal: %s", error.message);
sd_bus_error_free(&error);
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return;
}
ret = sd_bus_message_read(msg, "h", &lock_fd);
if (ret < 0) {
wlr_log(WLR_ERROR, "Failed to parse D-Bus response for Inhibit: %s",
strerror(-ret));
sd_bus_error_free(&error);
sd_bus_message_unref(msg);
return;
} else {
wlr_log(WLR_INFO, "Got sleep lock: %d", lock_fd);
}
// sd_bus_message_unref closes the file descriptor so we need
// to copy it beforehand
lock_fd = fcntl(lock_fd, F_DUPFD_CLOEXEC, 3);
if (lock_fd < 0) {
wlr_log(WLR_ERROR, "Failed to copy sleep lock fd: %s",
strerror(errno));
}
sd_bus_error_free(&error);
sd_bus_message_unref(msg);
}
static int prepare_for_sleep(sd_bus_message *msg, void *userdata,
sd_bus_error *ret_error) {
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/* "b" apparently reads into an int, not a bool */
int going_down = 1;
int ret = sd_bus_message_read(msg, "b", &going_down);
if (ret < 0) {
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wlr_log(WLR_ERROR, "Failed to parse D-Bus response for Inhibit: %s",
strerror(-ret));
}
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wlr_log(WLR_DEBUG, "PrepareForSleep signal received %d", going_down);
if (!going_down) {
acquire_sleep_lock();
return 0;
}
ongoing_fd = lock_fd;
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if (state.lock_cmd) {
cmd_exec(state.lock_cmd);
}
if (ongoing_fd >= 0) {
struct wl_event_source *source =
wl_event_loop_add_timer(state.event_loop, release_lock, NULL);
wl_event_source_timer_update(source, 1000);
}
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wlr_log(WLR_DEBUG, "Prepare for sleep done");
return 0;
}
static int dbus_event(int fd, uint32_t mask, void *data) {
sd_bus *bus = data;
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if ((mask & WL_EVENT_HANGUP) || (mask & WL_EVENT_ERROR)) {
sway_terminate(0);
}
int count = 0;
if (mask & WL_EVENT_READABLE) {
count = sd_bus_process(bus, NULL);
}
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if (mask & WL_EVENT_WRITABLE) {
sd_bus_flush(bus);
}
if (mask == 0) {
sd_bus_flush(bus);
}
if (count < 0) {
wlr_log_errno(WLR_ERROR, "sd_bus_process failed, exiting");
sway_terminate(0);
}
return count;
}
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static void setup_sleep_listener(void) {
int ret = sd_bus_default_system(&bus);
if (ret < 0) {
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wlr_log(WLR_ERROR, "Failed to open D-Bus connection: %s",
strerror(-ret));
return;
}
char str[256];
const char *fmt = "type='signal',"
"sender='org.freedesktop.login1',"
"interface='org.freedesktop.login1.%s',"
"member='%s'," "path='%s'";
snprintf(str, sizeof(str), fmt, "Manager", "PrepareForSleep",
"/org/freedesktop/login1");
ret = sd_bus_add_match(bus, NULL, str, prepare_for_sleep, NULL);
if (ret < 0) {
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wlr_log(WLR_ERROR, "Failed to add D-Bus match: %s", strerror(-ret));
return;
}
acquire_sleep_lock();
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struct wl_event_source *source = wl_event_loop_add_fd(state.event_loop,
sd_bus_get_fd(bus), WL_EVENT_READABLE, dbus_event, bus);
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wl_event_source_check(source);
}
#endif
static void handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version) {
if (strcmp(interface, org_kde_kwin_idle_interface.name) == 0) {
idle_manager =
wl_registry_bind(registry, name, &org_kde_kwin_idle_interface, 1);
} else if (strcmp(interface, wl_seat_interface.name) == 0) {
seat = wl_registry_bind(registry, name, &wl_seat_interface, 1);
}
}
static void handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name) {
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// Who cares
}
static const struct wl_registry_listener registry_listener = {
.global = handle_global,
.global_remove = handle_global_remove,
};
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static const struct org_kde_kwin_idle_timeout_listener idle_timer_listener;
static void register_timeout(struct swayidle_timeout_cmd *cmd,
int timeout) {
if (cmd->idle_timer != NULL) {
org_kde_kwin_idle_timeout_destroy(cmd->idle_timer);
cmd->idle_timer = NULL;
}
if (timeout < 0) {
wlr_log(WLR_DEBUG, "Not registering idle timeout");
return;
}
wlr_log(WLR_DEBUG, "Register with timeout: %d", timeout);
cmd->idle_timer =
org_kde_kwin_idle_get_idle_timeout(idle_manager, seat, timeout);
org_kde_kwin_idle_timeout_add_listener(cmd->idle_timer,
&idle_timer_listener, cmd);
cmd->registered_timeout = timeout;
}
static void handle_idle(void *data, struct org_kde_kwin_idle_timeout *timer) {
struct swayidle_timeout_cmd *cmd = data;
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wlr_log(WLR_DEBUG, "idle state");
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if (cmd->idle_cmd) {
cmd_exec(cmd->idle_cmd);
}
}
static void handle_resume(void *data, struct org_kde_kwin_idle_timeout *timer) {
struct swayidle_timeout_cmd *cmd = data;
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wlr_log(WLR_DEBUG, "active state");
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if (cmd->registered_timeout != cmd->timeout) {
register_timeout(cmd, cmd->timeout);
}
if (cmd->resume_cmd) {
cmd_exec(cmd->resume_cmd);
}
}
static const struct org_kde_kwin_idle_timeout_listener idle_timer_listener = {
.idle = handle_idle,
.resumed = handle_resume,
};
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static char *parse_command(int argc, char **argv) {
if (argc < 1) {
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wlr_log(WLR_ERROR, "Missing command");
return NULL;
}
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wlr_log(WLR_DEBUG, "Command: %s", argv[0]);
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return strdup(argv[0]);
}
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static int parse_timeout(int argc, char **argv) {
if (argc < 3) {
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wlr_log(WLR_ERROR, "Too few parameters to timeout command. "
"Usage: timeout <seconds> <command>");
exit(-1);
}
errno = 0;
char *endptr;
int seconds = strtoul(argv[1], &endptr, 10);
if (errno != 0 || *endptr != '\0') {
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wlr_log(WLR_ERROR, "Invalid timeout parameter '%s', it should be a "
"numeric value representing seconds", optarg);
exit(-1);
}
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struct swayidle_timeout_cmd *cmd =
calloc(1, sizeof(struct swayidle_timeout_cmd));
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if (seconds > 0) {
cmd->timeout = seconds * 1000;
} else {
cmd->timeout = -1;
}
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wlr_log(WLR_DEBUG, "Register idle timeout at %d ms", cmd->timeout);
wlr_log(WLR_DEBUG, "Setup idle");
cmd->idle_cmd = parse_command(argc - 2, &argv[2]);
int result = 3;
if (argc >= 5 && !strcmp("resume", argv[3])) {
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wlr_log(WLR_DEBUG, "Setup resume");
cmd->resume_cmd = parse_command(argc - 4, &argv[4]);
result = 5;
}
list_add(state.timeout_cmds, cmd);
return result;
}
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static int parse_sleep(int argc, char **argv) {
if (argc < 2) {
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wlr_log(WLR_ERROR, "Too few parameters to before-sleep command. "
"Usage: before-sleep <command>");
exit(-1);
}
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state.lock_cmd = parse_command(argc - 1, &argv[1]);
if (state.lock_cmd) {
wlr_log(WLR_DEBUG, "Setup sleep lock: %s", state.lock_cmd);
}
return 2;
}
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static int parse_args(int argc, char *argv[]) {
bool debug = false;
int c;
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while ((c = getopt(argc, argv, "hd")) != -1) {
switch (c) {
case 'd':
debug = true;
break;
case 'h':
case '?':
printf("Usage: %s [OPTIONS]\n", argv[0]);
printf(" -d\tdebug\n");
printf(" -h\tthis help menu\n");
return 1;
default:
return 1;
}
}
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wlr_log_init(debug ? WLR_DEBUG : WLR_INFO, NULL);
state.timeout_cmds = create_list();
int i = optind;
while (i < argc) {
if (!strcmp("timeout", argv[i])) {
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wlr_log(WLR_DEBUG, "Got timeout");
i += parse_timeout(argc - i, &argv[i]);
} else if (!strcmp("before-sleep", argv[i])) {
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wlr_log(WLR_DEBUG, "Got before-sleep");
i += parse_sleep(argc - i, &argv[i]);
} else {
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wlr_log(WLR_ERROR, "Unsupported command '%s'", argv[i]);
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return 1;
}
}
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return 0;
}
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static int handle_signal(int sig, void *data) {
switch (sig) {
case SIGINT:
case SIGTERM:
sway_terminate(0);
return 0;
case SIGUSR1:
wlr_log(WLR_DEBUG, "Got SIGUSR1");
for (int i = 0; i < state.timeout_cmds->length; ++i) {
register_timeout(state.timeout_cmds->items[i], 0);
}
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return 1;
}
assert(false); // not reached
}
static int display_event(int fd, uint32_t mask, void *data) {
if ((mask & WL_EVENT_HANGUP) || (mask & WL_EVENT_ERROR)) {
sway_terminate(0);
}
int count = 0;
if (mask & WL_EVENT_READABLE) {
count = wl_display_dispatch(state.display);
}
if (mask & WL_EVENT_WRITABLE) {
wl_display_flush(state.display);
}
if (mask == 0) {
count = wl_display_dispatch_pending(state.display);
wl_display_flush(state.display);
}
if (count < 0) {
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wlr_log_errno(WLR_ERROR, "wl_display_dispatch failed, exiting");
sway_terminate(0);
}
return count;
}
int main(int argc, char *argv[]) {
if (parse_args(argc, argv) != 0) {
return -1;
}
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state.event_loop = wl_event_loop_create();
wl_event_loop_add_signal(state.event_loop, SIGINT, handle_signal, NULL);
wl_event_loop_add_signal(state.event_loop, SIGTERM, handle_signal, NULL);
wl_event_loop_add_signal(state.event_loop, SIGUSR1, handle_signal, NULL);
state.display = wl_display_connect(NULL);
if (state.display == NULL) {
wlr_log(WLR_ERROR, "Unable to connect to the compositor. "
"If your compositor is running, check or set the "
"WAYLAND_DISPLAY environment variable.");
return -3;
}
struct wl_registry *registry = wl_display_get_registry(state.display);
wl_registry_add_listener(registry, &registry_listener, NULL);
wl_display_roundtrip(state.display);
if (idle_manager == NULL) {
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wlr_log(WLR_ERROR, "Display doesn't support idle protocol");
return -4;
}
if (seat == NULL) {
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wlr_log(WLR_ERROR, "Seat error");
return -5;
}
bool should_run = state.timeout_cmds->length > 0;
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#if HAVE_SYSTEMD || HAVE_ELOGIND
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if (state.lock_cmd) {
should_run = true;
setup_sleep_listener();
}
#endif
if (!should_run) {
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wlr_log(WLR_INFO, "No command specified! Nothing to do, will exit");
sway_terminate(0);
}
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for (int i = 0; i < state.timeout_cmds->length; ++i) {
struct swayidle_timeout_cmd *cmd = state.timeout_cmds->items[i];
register_timeout(cmd, cmd->timeout);
}
wl_display_roundtrip(state.display);
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struct wl_event_source *source = wl_event_loop_add_fd(state.event_loop,
wl_display_get_fd(state.display), WL_EVENT_READABLE,
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display_event, NULL);
wl_event_source_check(source);
while (wl_event_loop_dispatch(state.event_loop, -1) != 1) {
// This space intentionally left blank
}
sway_terminate(0);
}