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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <inttypes.h>
#include <time.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <termios.h>
#include <sys/stat.h>
#include "config.h"
#ifdef HAVE_SYSTEMD
# include <systemd/sd-bus.h>
#endif
#include "logind.h"
#include "kbd.h"
#ifdef HAVE_SYSTEMD
/* ---------------------------------------------------------------------- */
static sd_bus *logind_dbus = NULL;
int logind_init(void)
{
int r;
r = sd_bus_open_system(&logind_dbus);
if (r < 0) {
fprintf(stderr, "Failed to connect to system bus: %s\n", strerror(-r));
return -1;
}
r = logind_take_control();
if (r < 0) {
sd_bus_unref(logind_dbus);
logind_dbus = NULL;
return -1;
}
fprintf(stderr, "Opening input devices via logind.\n");
return 0;
}
int logind_dbus_fd(void)
{
if (!logind_dbus)
return -1;
return sd_bus_get_fd(logind_dbus);
}
void logind_dbus_input(void)
{
sd_bus_message *m = NULL;
int ret;
if (!logind_dbus)
return;
do {
ret = sd_bus_process(logind_dbus, &m);
fprintf(stderr, "%s: path %s\n", __func__,
sd_bus_message_get_path(m));
sd_bus_message_unref(m);
} while (ret > 0);
}
int logind_take_control(void)
{
sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus_message *m = NULL;
int r;
if (!logind_dbus)
return -1;
r = sd_bus_call_method(logind_dbus,
"org.freedesktop.login1",
"/org/freedesktop/login1/session/self",
"org.freedesktop.login1.Session",
"TakeControl",
&error,
&m,
"b",
false);
if (r < 0) {
fprintf(stderr, "TakeControl failed: %s\n", error.message);
sd_bus_error_free(&error);
}
sd_bus_message_unref(m);
return r;
}
int logind_release_control(void)
{
sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus_message *m = NULL;
int r;
if (!logind_dbus)
return -1;
r = sd_bus_call_method(logind_dbus,
"org.freedesktop.login1",
"/org/freedesktop/login1/session/self",
"org.freedesktop.login1.Session",
"ReleaseControl",
&error,
&m,
"");
if (r < 0) {
fprintf(stderr, "ReleaseControl failed: %s\n", error.message);
sd_bus_error_free(&error);
}
sd_bus_message_unref(m);
return r;
}
int logind_open(const char *path, int flags, void *user_data)
{
sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus_message *m = NULL;
struct stat st;
unsigned int maj, min;
int inactive;
int handle, fd, r;
r = stat(path, &st);
if (r < 0) {
fprintf(stderr, "stat %s failed: %s\n", path, strerror(errno));
libinput_deverror++;
return -1;
}
maj = major(st.st_rdev);
min = minor(st.st_rdev);
r = sd_bus_call_method(logind_dbus,
"org.freedesktop.login1",
"/org/freedesktop/login1/session/self",
"org.freedesktop.login1.Session",
"TakeDevice",
&error,
&m,
"uu",
maj,
min);
if (r < 0) {
fprintf(stderr, "TakeDevice failed: %s\n", error.message);
sd_bus_error_free(&error);
libinput_deverror++;
return -1;
}
handle = -1;
inactive = -1;
r = sd_bus_message_read(m, "hb", &handle, &inactive);
if (r < 0) {
fd = -1;
fprintf(stderr, "Parsing TakeDevice reply failed: %s\n", strerror(-r));
libinput_deverror++;
} else {
fd = fcntl(handle, F_DUPFD_CLOEXEC, 0);
fprintf(stderr, "open %s: got fd %d via logind.\n",
path, fd);
libinput_devcount++;
}
sd_bus_message_unref(m);
return fd;
}
void logind_close(int fd, void *user_data)
{
sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus_message *m = NULL;
struct stat st;
unsigned int maj, min;
int r;
r = fstat(fd, &st);
if (r < 0) {
fprintf(stderr, "fstat failed: %s\n", strerror(errno));
return;
}
close(fd);
maj = major(st.st_rdev);
min = minor(st.st_rdev);
r = sd_bus_call_method(logind_dbus,
"org.freedesktop.login1",
"/org/freedesktop/login1/session/self",
"org.freedesktop.login1.Session",
"ReleaseDevice",
&error,
&m,
"uu",
maj,
min);
if (r < 0) {
fprintf(stderr, "ReleaseDevice failed: %s\n", error.message);
sd_bus_error_free(&error);
}
sd_bus_message_unref(m);
libinput_devcount--;
return;
}
#else
/* ---------------------------------------------------------------------- */
int logind_init(void)
{
fprintf(stderr, "warning: compiled without logind support.\n");
return -1;
}
int logind_dbus_fd(void)
{
return -1;
}
void logind_dbus_input(void)
{
}
int logind_take_control(void)
{
return -1;
}
int logind_open(const char *path, int flags, void *user_data)
{
fprintf(stderr, "error: compiled without logind support.\n");
libinput_deverror++;
return -1;
}
void logind_close(int fd, void *user_data)
{
}
#endif
/* ---------------------------------------------------------------------- */
const struct libinput_interface libinput_if_logind = {
.open_restricted = logind_open,
.close_restricted = logind_close,
};
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