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// based on code from VLC
// https://github.com/videolan/vlc/blob/734a505509828c3333067ea6be174f3a6525e486/modules/misc/inhibit/dbus.c
#include <dbus/dbus.h>
#include <stdio.h>
#include <stdlib.h>
enum inhibit_api
{
INVALID = 0,
FDO_SS, /**< KDE >= 4 and GNOME >= 3.10 */
FDO_PM, /**< KDE and GNOME <= 2.26 */
MATE, /**< >= 1.0 */
GNOME, /**< GNOME 2.26..3.4 */
};
#define MAX_API (GNOME+1)
/* Currently, all services have identical service and interface names. */
static const char dbus_service[][40] =
{
[INVALID] = { 0 },
[FDO_SS] = "org.freedesktop.ScreenSaver",
[FDO_PM] = "org.freedesktop.PowerManagement.Inhibit",
[MATE] = "org.mate.SessionManager",
[GNOME] = "org.gnome.SessionManager",
};
static const char dbus_path[][33] =
{
[INVALID] = { 0 },
[FDO_SS] = "/ScreenSaver",
[FDO_PM] = "/org/freedesktop/PowerManagement",
[MATE] = "/org/mate/SessionManager",
[GNOME] = "/org/gnome/SessionManager",
};
static const char dbus_method_uninhibit[][10] =
{
[INVALID] = { 0 },
[FDO_SS] = "UnInhibit",
[FDO_PM] = "UnInhibit",
[MATE] = "Uninhibit",
[GNOME] = "Uninhibit",
};
int main(int argc, char **argv) {
if (argc != 3) {
puts("usage: inhibit-screensaver APPLICATION REASON");
exit(1);
}
DBusConnection *conn;
dbus_uint32_t cookie = 0;
enum inhibit_api api = INVALID;
DBusError err;
dbus_error_init(&err);
conn = dbus_bus_get_private(DBUS_BUS_SESSION, &err);
if (conn == NULL) {
fprintf(stderr, "cannot connect to session bus: %s\n", err.message);
// dbus_error_free(&err);
exit(1);
}
for (unsigned i = 1; i < MAX_API; i++) {
if (dbus_bus_name_has_owner(conn, dbus_service[i], NULL)) {
api = i;
break;
}
}
if (!api) {
fprintf(stderr, "cannot find screensaver dbus name\n");
// dbus_error_free(&err);
exit(1);
}
dbus_bool_t ret;
DBusMessage *msg = dbus_message_new_method_call(dbus_service[api], dbus_path[api], dbus_service[api], "Inhibit");
if (!msg) {
fputs("cannot create dbus message", stderr);
exit(1);
}
const char *app = argv[1];
const char *reason = argv[2];
switch (api)
{
case MATE:
case GNOME:
{
dbus_uint32_t xid = 0; // FIXME ?
dbus_uint32_t gflags = 0xC;
ret = dbus_message_append_args(msg, DBUS_TYPE_STRING, &app,
DBUS_TYPE_UINT32, &xid,
DBUS_TYPE_STRING, &reason,
DBUS_TYPE_UINT32, &gflags,
DBUS_TYPE_INVALID);
break;
}
default:
ret = dbus_message_append_args(msg, DBUS_TYPE_STRING, &app,
DBUS_TYPE_STRING, &reason,
DBUS_TYPE_INVALID);
break;
}
if (!ret) {
fputs("cannot create dbus Inhibit message (OOM?)", stderr);
// dbus_error_free(&err);
exit(1);
}
DBusMessage *reply = dbus_connection_send_with_reply_and_block(conn, msg, DBUS_TIMEOUT_INFINITE, &err);
dbus_message_unref(msg);
if (!reply) {
fprintf(stderr, "cannot send dbus Inhibit message: %s\n", err.message);
// dbus_error_free(&err);
exit(1);
}
if (!dbus_message_get_args(reply, &err,
DBUS_TYPE_UINT32, &cookie,
DBUS_TYPE_INVALID)) {
fprintf(stderr, "cannot parse dbus Inhibit reply: %s\n", err.message);
// dbus_message_unref(reply);
// dbus_error_free(&err);
exit(1);
}
dbus_message_unref(reply);
char buf;
while (fread(&buf, 1, 1, stdin) == 1)
;
msg = dbus_message_new_method_call(dbus_service[api], dbus_path[api], dbus_service[api], dbus_method_uninhibit[api]);
if (!msg) {
fputs("cannot create dbus message", stderr);
exit(1);
}
if (!dbus_message_append_args(msg, DBUS_TYPE_UINT32, &cookie, DBUS_TYPE_INVALID)) {
fprintf(stderr, "cannot create dbus UnInhibit message: %s\n", err.message);
// dbus_error_free(&err);
exit(1);
}
if (!dbus_connection_send(conn, msg, NULL)) {
fputs("cannot send dbus UnInhibit message", stderr);
// dbus_error_free(&err);
exit(1);
}
dbus_connection_flush(conn);
dbus_connection_close(conn);
dbus_connection_unref(conn);
return 0;
}
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