static int
pipe_attach_remote_writer (pipe_t *self, const char *remote, bool unicast)
{
assert (self);
if (self->reader == REMOTE_NODE) {
// We're witnessing two nodes chatting, so we can drop the pipe
// and forget all about it
pipe_destroy (&self);
return 0;
}
else
if (self->writer == NULL) {
// This is how we indicate a remote writer
self->writer = REMOTE_NODE;
self->remote = strdup (remote);
zsys_info ("%s: attach remote writer", self->name);
if (self->reader && !unicast) {
// Tell remote node we're acting as reader, if we got a
// broadcast message. If we got a unicast message, the peer
// already knows about us, so don't re-echo the message
zmsg_t *msg = zmsg_new ();
zmsg_addstr (msg, "HAVE READER");
zmsg_addstr (msg, self->name);
zyre_whisper (self->server->zyre, self->remote, &msg);
zsys_info ("%s: tell peer we are now reader", self->name);
}
return 0;
}
zsys_info ("%s: pipe already has writer: ignored", self->name);
return -1;
}
static void
pipe_drop_local_writer (pipe_t **self_p)
{
assert (self_p);
if (*self_p) {
pipe_t *self = *self_p;
// TODO: what if self->writer is REMOTE_NODE?
self->writer = NULL;
if (self->reader) {
if (self->reader == REMOTE_NODE) {
// Tell remote node we're dropping off
zmsg_t *msg = zmsg_new ();
zmsg_addstr (msg, "DROP WRITER");
zmsg_addstr (msg, self->name);
zyre_whisper (self->server->zyre, self->remote, &msg);
zsys_info ("%s: tell peer we stopped being writer", self->name);
}
else {
engine_send_event (self->reader, writer_dropped_event);
// Don't destroy pipe yet - reader is still using it
*self_p = NULL;
}
}
pipe_destroy (self_p);
}
}
static int pipe_check_availability(void) {
grpc_wakeup_fd fd;
if (pipe_init(&fd) == GRPC_ERROR_NONE) {
pipe_destroy(&fd);
return 1;
} else {
return 0;
}
}
void event_exit_platform(void) {
semaphore_destroy(&_usb_poll_resume);
semaphore_destroy(&_usb_poll_suspend);
array_destroy(&_usb_poll_pollfds, NULL);
pipe_destroy(&_usb_poll_ready_pipe);
usbi_close(_usb_poll_suspend_pipe[0]);
usbi_close(_usb_poll_suspend_pipe[1]);
event_remove_source(_stop_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC);
pipe_destroy(&_stop_pipe);
free(_socket_error_set);
free(_socket_write_set);
free(_socket_read_set);
}
void l2_packet_deinit(struct l2_packet_data *l2)
{
if (l2 == NULL)
return;
if (l2->fd >= 0) {
eloop_unregister_read_sock(l2->fd);
pipe_destroy(l2->fd);
}
os_free(l2);
}
void iokit_exit(void) {
log_debug("Shutting down IOKit subsystem");
if (_running) {
_running = false;
CFRunLoopStop(_run_loop);
CFRelease(_run_loop);
thread_join(&_poll_thread);
}
thread_destroy(&_poll_thread);
event_remove_source(_notification_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC);
pipe_destroy(&_notification_pipe);
}
static void
pipe_drop_remote_writer (pipe_t **self_p, const char *remote)
{
assert (self_p);
if (*self_p) {
pipe_t *self = *self_p;
if (self->writer == REMOTE_NODE && streq (self->remote, remote)) {
self->writer = NULL;
if (self->reader) {
assert (self->reader != REMOTE_NODE);
engine_send_event (self->reader, writer_dropped_event);
// Don't destroy pipe yet - reader is still using it
*self_p = NULL;
}
}
pipe_destroy (self_p);
}
}
static void process_destroy(Object *object) {
Process *process = (Process *)object;
int rc;
bool stuck = false;
// remove the state change pipe from the event loop to avoid sending
// callbacks in case the child process is still alive and has to be killed
event_remove_source(process->state_change_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC);
// FIXME: this code here has the same race condition as process_kill
if (process_is_alive(process)) {
log_warn("Destroying process object (id: %u, executable: %s) while child process (pid: %u) is still alive",
process->base.id, process->executable->buffer, process->pid);
rc = kill(process->pid, SIGKILL);
if (rc < 0) {
if (errno != ESRCH) {
stuck = true;
}
log_error("Could not send SIGKILL signal to child process (executable: %s, pid: %u): %s (%d)",
process->executable->buffer, process->pid, get_errno_name(errno), errno);
}
}
if (!stuck) {
thread_join(&process->wait_thread);
}
thread_destroy(&process->wait_thread);
pipe_destroy(&process->state_change_pipe);
file_release(process->stderr);
file_release(process->stdout);
file_release(process->stdin);
string_unlock_and_release(process->working_directory);
list_unlock_and_release(process->environment);
list_unlock_and_release(process->arguments);
string_unlock_and_release(process->executable);
free(process);
}
DWORD
CE_Cleanup(PCONFIGURATION_ENTRY pce)
{
DWORD dwErr = NO_ERROR;
int i;
if (pce->hRtmNotificationHandle) {
dwErr = RtmDeregisterFromChangeNotification(
pce->hRtmHandle,
pce->hRtmNotificationHandle);
if (dwErr != NO_ERROR)
TRACE1(CONFIGURATION,
"Error %u deregistering for change from RTM", dwErr);
}
pce->hRtmNotificationHandle = NULL;
if (pce->hRtmHandle) {
dwErr = RtmDeregisterEntity(pce->hRtmHandle);
if (dwErr != NO_ERROR)
TRACE1(CONFIGURATION,
"Error %u deregistering from RTM", dwErr);
}
pce->hRtmHandle = NULL;
for (i = 0; i < PIPE_INSTANCES; i++) {
if (pce->pipes[i]) {
pipe_destroy(pce->pipes[i]);
pce->pipes[i] = NULL;
}
}
if (pce->hMprConfig != NULL) {
MprConfigServerDisconnect(pce->hMprConfig);
}
pce->hMprConfig = NULL;
pce->iscStatus = XORPRTM_STATUS_STOPPED;
return NO_ERROR;
}
int iokit_init(void) {
int phase = 0;
Semaphore handshake;
log_debug("Initializing IOKit subsystem");
// create notification pipe
if (pipe_create(&_notification_pipe) < 0) {
log_error("Could not create notification pipe: %s (%d)",
get_errno_name(errno), errno);
goto cleanup;
}
phase = 1;
if (event_add_source(_notification_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC,
EVENT_READ, iokit_forward_notifications, NULL) < 0) {
goto cleanup;
}
phase = 2;
// create notification poll thread
if (semaphore_create(&handshake) < 0) {
log_error("Could not create handshake semaphore: %s (%d)",
get_errno_name(errno), errno);
goto cleanup;
}
thread_create(&_poll_thread, iokit_poll_notifications, &handshake);
semaphore_acquire(&handshake);
semaphore_destroy(&handshake);
phase = 3;
if (!_running) {
log_error("Could not start notification poll thread");
goto cleanup;
}
phase = 4;
cleanup:
switch (phase) { // no breaks, all cases fall through intentionally
case 3:
thread_destroy(&_poll_thread);
case 2:
event_remove_source(_notification_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC);
case 1:
pipe_destroy(&_notification_pipe);
default:
break;
}
return phase == 4 ? 0 : -1;
}
int event_init_platform(void) {
int phase = 0;
// create read set
if (event_reserve_socket_set(&_socket_read_set, 32) < 0) {
log_error("Could not create socket read set: %s (%d)",
get_errno_name(errno), errno);
goto cleanup;
}
phase = 1;
// create write set
if (event_reserve_socket_set(&_socket_write_set, 32) < 0) {
log_error("Could not create socket write set: %s (%d)",
get_errno_name(errno), errno);
goto cleanup;
}
phase = 2;
// create error set
if (event_reserve_socket_set(&_socket_error_set, 32) < 0) {
log_error("Could not create socket error set: %s (%d)",
get_errno_name(errno), errno);
goto cleanup;
}
phase = 3;
// create stop pipe
if (pipe_create(&_stop_pipe, 0) < 0) {
log_error("Could not create stop pipe: %s (%d)",
get_errno_name(errno), errno);
goto cleanup;
}
phase = 4;
if (event_add_source(_stop_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC,
EVENT_READ, NULL, NULL) < 0) {
goto cleanup;
}
phase = 5;
// create USB poll thread
_usb_poll_running = false;
_usb_poll_stuck = false;
if (usbi_pipe(_usb_poll_suspend_pipe) < 0) {
log_error("Could not create USB suspend pipe");
goto cleanup;
}
phase = 6;
if (pipe_create(&_usb_poll_ready_pipe, 0) < 0) {
log_error("Could not create USB ready pipe: %s (%d)",
get_errno_name(errno), errno);
goto cleanup;
}
phase = 7;
if (array_create(&_usb_poll_pollfds, 32, sizeof(struct usbi_pollfd), true) < 0) {
log_error("Could not create USB pollfd array: %s (%d)",
get_errno_name(errno), errno);
goto cleanup;
}
phase = 8;
if (semaphore_create(&_usb_poll_resume) < 0) {
log_error("Could not create USB resume semaphore: %s (%d)",
get_errno_name(errno), errno);
goto cleanup;
}
phase = 9;
if (semaphore_create(&_usb_poll_suspend) < 0) {
log_error("Could not create USB suspend semaphore: %s (%d)",
get_errno_name(errno), errno);
goto cleanup;
}
phase = 10;
cleanup:
switch (phase) { // no breaks, all cases fall through intentionally
case 9:
semaphore_destroy(&_usb_poll_suspend);
case 8:
semaphore_destroy(&_usb_poll_resume);
case 7:
pipe_destroy(&_usb_poll_ready_pipe);
case 6:
usbi_close(_usb_poll_suspend_pipe[0]);
usbi_close(_usb_poll_suspend_pipe[1]);
case 5:
event_remove_source(_stop_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC);
case 4:
pipe_destroy(&_stop_pipe);
case 3:
free(_socket_error_set);
case 2:
free(_socket_write_set);
case 1:
free(_socket_read_set);
default:
break;
}
return phase == 10 ? 0 : -1;
}
// NOTE: this function needs to call RegisterServiceCtrlHandlerEx and
// SetServiceStatus in all circumstances if brickd is running as service
static int generic_main(int log_to_file, int debug) {
int exit_code = EXIT_FAILURE;
const char *mutex_name = "Global\\Tinkerforge-Brick-Daemon-Single-Instance";
HANDLE mutex_handle = NULL;
int mutex_error = 0;
DWORD service_exit_code = NO_ERROR;
int rc;
char filename[1024];
int i;
FILE *logfile = NULL;
WSADATA wsa_data;
DEV_BROADCAST_DEVICEINTERFACE notification_filter;
HDEVNOTIFY notification_handle;
mutex_handle = OpenMutex(SYNCHRONIZE, FALSE, mutex_name);
if (mutex_handle == NULL) {
rc = GetLastError();
if (rc == ERROR_ACCESS_DENIED) {
rc = service_is_running();
if (rc < 0) {
mutex_error = 1;
// FIXME: set service_exit_code
goto error_mutex;
} else if (rc) {
mutex_error = 1;
service_exit_code = ERROR_SERVICE_ALREADY_RUNNING;
log_error("Could not start as %s, another instance is already running as service",
_run_as_service ? "service" : "console application");
goto error_mutex;
}
}
if (rc != ERROR_FILE_NOT_FOUND) {
mutex_error = 1;
// FIXME: set service_exit_code
rc += ERRNO_WINAPI_OFFSET;
log_error("Could not open single instance mutex: %s (%d)",
get_errno_name(rc), rc);
goto error_mutex;
}
}
if (mutex_handle != NULL) {
mutex_error = 1;
service_exit_code = ERROR_SERVICE_ALREADY_RUNNING;
log_error("Could not start as %s, another instance is already running",
_run_as_service ? "service" : "console application");
goto error_mutex;
}
mutex_handle = CreateMutex(NULL, FALSE, mutex_name);
if (mutex_handle == NULL) {
mutex_error = 1;
// FIXME: set service_exit_code
rc = ERRNO_WINAPI_OFFSET + GetLastError();
log_error("Could not create single instance mutex: %s (%d)",
get_errno_name(rc), rc);
goto error_mutex;
}
if (!_run_as_service &&
!SetConsoleCtrlHandler(console_ctrl_handler, TRUE)) {
rc = ERRNO_WINAPI_OFFSET + GetLastError();
log_warn("Could not set console control handler: %s (%d)",
get_errno_name(rc), rc);
}
if (log_to_file) {
if (GetModuleFileName(NULL, filename, sizeof(filename)) == 0) {
rc = ERRNO_WINAPI_OFFSET + GetLastError();
log_warn("Could not get module file name: %s (%d)",
get_errno_name(rc), rc);
} else {
i = strlen(filename);
if (i < 4) {
log_warn("Module file name '%s' is too short", filename);
} else {
strcpy(filename + i - 3, "log");
logfile = fopen(filename, "a+");
if (logfile == NULL) {
log_warn("Could not open logfile '%s'", filename);
} else {
log_set_file(logfile);
}
}
}
}
if (debug) {
log_set_level(LOG_CATEGORY_EVENT, LOG_LEVEL_DEBUG);
log_set_level(LOG_CATEGORY_USB, LOG_LEVEL_DEBUG);
log_set_level(LOG_CATEGORY_NETWORK, LOG_LEVEL_DEBUG);
log_set_level(LOG_CATEGORY_HOTPLUG, LOG_LEVEL_DEBUG);
log_set_level(LOG_CATEGORY_OTHER, LOG_LEVEL_DEBUG);
} else {
log_set_level(LOG_CATEGORY_EVENT, config_get_log_level(LOG_CATEGORY_EVENT));
log_set_level(LOG_CATEGORY_USB, config_get_log_level(LOG_CATEGORY_USB));
log_set_level(LOG_CATEGORY_NETWORK, config_get_log_level(LOG_CATEGORY_NETWORK));
log_set_level(LOG_CATEGORY_HOTPLUG, config_get_log_level(LOG_CATEGORY_HOTPLUG));
log_set_level(LOG_CATEGORY_OTHER, config_get_log_level(LOG_CATEGORY_OTHER));
}
if (_run_as_service) {
log_info("Brick Daemon %s started (as service)", VERSION_STRING);
} else {
log_info("Brick Daemon %s started", VERSION_STRING);
}
if (config_has_error()) {
log_warn("Errors found in config file '%s', run with --check-config option for details",
_config_filename);
}
// initialize service status
error_mutex:
if (_run_as_service) {
if (service_init(service_control_handler) < 0) {
// FIXME: set service_exit_code
goto error;
}
if (!mutex_error) {
// service is starting
service_set_status(SERVICE_START_PENDING, NO_ERROR);
}
}
if (mutex_error) {
goto error;
}
// initialize WinSock2
if (WSAStartup(MAKEWORD(2, 2), &wsa_data) != 0) {
// FIXME: set service_exit_code
rc = ERRNO_WINAPI_OFFSET + WSAGetLastError();
log_error("Could not initialize Windows Sockets 2.2: %s (%d)",
get_errno_name(rc), rc);
goto error_event;
}
if (event_init() < 0) {
// FIXME: set service_exit_code
goto error_event;
}
if (usb_init() < 0) {
// FIXME: set service_exit_code
goto error_usb;
}
// create notification pipe
if (pipe_create(_notification_pipe) < 0) {
// FIXME: set service_exit_code
log_error("Could not create notification pipe: %s (%d)",
get_errno_name(errno), errno);
goto error_pipe;
}
if (event_add_source(_notification_pipe[0], EVENT_SOURCE_TYPE_GENERIC,
EVENT_READ, forward_notifications, NULL) < 0) {
// FIXME: set service_exit_code
goto error_pipe_add;
}
// register device notification
ZeroMemory(¬ification_filter, sizeof(notification_filter));
notification_filter.dbcc_size = sizeof(notification_filter);
notification_filter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
notification_filter.dbcc_classguid = GUID_DEVINTERFACE_USB_DEVICE;
if (_run_as_service) {
notification_handle = RegisterDeviceNotification((HANDLE)service_get_status_handle(),
¬ification_filter,
DEVICE_NOTIFY_SERVICE_HANDLE);
} else {
if (message_pump_start() < 0) {
// FIXME: set service_exit_code
goto error_pipe_add;
}
notification_handle = RegisterDeviceNotification(_message_pump_hwnd,
¬ification_filter,
DEVICE_NOTIFY_WINDOW_HANDLE);
}
if (notification_handle == NULL) {
// FIXME: set service_exit_code
rc = ERRNO_WINAPI_OFFSET + GetLastError();
log_error("Could not register for device notification: %s (%d)",
get_errno_name(rc), rc);
goto error_notification;
}
if (network_init() < 0) {
// FIXME: set service_exit_code
goto error_network;
}
// running
if (_run_as_service) {
service_set_status(SERVICE_RUNNING, NO_ERROR);
}
if (event_run() < 0) {
// FIXME: set service_exit_code
goto error_run;
}
exit_code = EXIT_SUCCESS;
error_run:
network_exit();
error_network:
UnregisterDeviceNotification(notification_handle);
error_notification:
if (!_run_as_service) {
message_pump_stop();
}
event_remove_source(_notification_pipe[0], EVENT_SOURCE_TYPE_GENERIC);
error_pipe_add:
pipe_destroy(_notification_pipe);
error_pipe:
usb_exit();
error_usb:
event_exit();
error_event:
log_info("Brick Daemon %s stopped", VERSION_STRING);
error:
log_exit();
config_exit();
if (_run_as_service) {
// because the service process can be terminated at any time after
// entering SERVICE_STOPPED state the mutex is closed beforehand,
// even though this creates a tiny time window in which the service
// is still running but the mutex is not held anymore
if (mutex_handle != NULL) {
CloseHandle(mutex_handle);
}
// service is now stopped
service_set_status(SERVICE_STOPPED, service_exit_code);
} else {
if (_pause_before_exit) {
printf("Press any key to exit...\n");
getch();
}
if (mutex_handle != NULL) {
CloseHandle(mutex_handle);
}
}
return exit_code;
}
// NOTE: this function needs to call RegisterServiceCtrlHandlerEx and
// SetServiceStatus in all circumstances if brickd is running as service
static int generic_main(bool log_to_file, bool debug, bool libusb_debug) {
int exit_code = EXIT_FAILURE;
const char *mutex_name = "Global\\Tinkerforge-Brick-Daemon-Single-Instance";
HANDLE mutex_handle = NULL;
bool fatal_error = false;
DWORD service_exit_code = NO_ERROR;
int rc;
char filename[1024];
int i;
FILE *log_file = NULL;
WSADATA wsa_data;
DEV_BROADCAST_DEVICEINTERFACE notification_filter;
HDEVNOTIFY notification_handle;
mutex_handle = OpenMutex(SYNCHRONIZE, FALSE, mutex_name);
if (mutex_handle == NULL) {
rc = GetLastError();
if (rc == ERROR_ACCESS_DENIED) {
rc = service_is_running();
if (rc < 0) {
fatal_error = true;
// FIXME: set service_exit_code
goto error_mutex;
} else if (rc) {
fatal_error = true;
service_exit_code = ERROR_SERVICE_ALREADY_RUNNING;
log_error("Could not start as %s, another instance is already running as service",
_run_as_service ? "service" : "console application");
goto error_mutex;
}
}
if (rc != ERROR_FILE_NOT_FOUND) {
fatal_error = true;
// FIXME: set service_exit_code
rc += ERRNO_WINAPI_OFFSET;
log_error("Could not open single instance mutex: %s (%d)",
get_errno_name(rc), rc);
goto error_mutex;
}
}
if (mutex_handle != NULL) {
fatal_error = true;
service_exit_code = ERROR_SERVICE_ALREADY_RUNNING;
log_error("Could not start as %s, another instance is already running",
_run_as_service ? "service" : "console application");
goto error_mutex;
}
mutex_handle = CreateMutex(NULL, FALSE, mutex_name);
if (mutex_handle == NULL) {
fatal_error = true;
// FIXME: set service_exit_code
rc = ERRNO_WINAPI_OFFSET + GetLastError();
log_error("Could not create single instance mutex: %s (%d)",
get_errno_name(rc), rc);
goto error_mutex;
}
if (log_to_file) {
if (GetModuleFileName(NULL, filename, sizeof(filename)) == 0) {
rc = ERRNO_WINAPI_OFFSET + GetLastError();
log_warn("Could not get module file name: %s (%d)",
get_errno_name(rc), rc);
} else {
i = strlen(filename);
if (i < 4) {
log_warn("Module file name '%s' is too short", filename);
} else {
filename[i - 3] = '\0';
string_append(filename, "log", sizeof(filename));
log_file = fopen(filename, "a+");
if (log_file == NULL) {
log_warn("Could not open log file '%s'", filename);
} else {
printf("Logging to '%s'\n", filename);
log_set_file(log_file);
}
}
}
} else if (_run_as_service) {
log_set_file(NULL);
}
if (!_run_as_service &&
!SetConsoleCtrlHandler(console_ctrl_handler, TRUE)) {
rc = ERRNO_WINAPI_OFFSET + GetLastError();
log_warn("Could not set console control handler: %s (%d)",
get_errno_name(rc), rc);
}
log_set_debug_override(debug);
log_set_level(LOG_CATEGORY_EVENT, config_get_option("log_level.event")->value.log_level);
log_set_level(LOG_CATEGORY_USB, config_get_option("log_level.usb")->value.log_level);
log_set_level(LOG_CATEGORY_NETWORK, config_get_option("log_level.network")->value.log_level);
log_set_level(LOG_CATEGORY_HOTPLUG, config_get_option("log_level.hotplug")->value.log_level);
log_set_level(LOG_CATEGORY_HARDWARE, config_get_option("log_level.hardware")->value.log_level);
log_set_level(LOG_CATEGORY_WEBSOCKET, config_get_option("log_level.websocket")->value.log_level);
log_set_level(LOG_CATEGORY_OTHER, config_get_option("log_level.other")->value.log_level);
if (config_has_error()) {
log_error("Error(s) in config file '%s', run with --check-config option for details",
_config_filename);
fatal_error = true;
goto error_config;
}
if (_run_as_service) {
log_info("Brick Daemon %s started (as service)", VERSION_STRING);
} else {
log_info("Brick Daemon %s started", VERSION_STRING);
}
if (config_has_warning()) {
log_warn("Warning(s) in config file '%s', run with --check-config option for details",
_config_filename);
}
// initialize service status
error_config:
error_mutex:
if (_run_as_service) {
if (service_init(service_control_handler) < 0) {
// FIXME: set service_exit_code
goto error;
}
if (!fatal_error) {
// service is starting
service_set_status(SERVICE_START_PENDING, NO_ERROR);
}
}
if (fatal_error) {
goto error;
}
// initialize WinSock2
if (WSAStartup(MAKEWORD(2, 2), &wsa_data) != 0) {
// FIXME: set service_exit_code
rc = ERRNO_WINAPI_OFFSET + WSAGetLastError();
log_error("Could not initialize Windows Sockets 2.2: %s (%d)",
get_errno_name(rc), rc);
goto error_event;
}
if (event_init() < 0) {
// FIXME: set service_exit_code
goto error_event;
}
if (hardware_init() < 0) {
// FIXME: set service_exit_code
goto error_hardware;
}
if (usb_init(libusb_debug) < 0) {
// FIXME: set service_exit_code
goto error_usb;
}
// create notification pipe
if (pipe_create(&_notification_pipe) < 0) {
// FIXME: set service_exit_code
log_error("Could not create notification pipe: %s (%d)",
get_errno_name(errno), errno);
goto error_pipe;
}
if (event_add_source(_notification_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC,
EVENT_READ, forward_notifications, NULL) < 0) {
// FIXME: set service_exit_code
goto error_pipe_add;
}
// register device notification
ZeroMemory(¬ification_filter, sizeof(notification_filter));
notification_filter.dbcc_size = sizeof(notification_filter);
notification_filter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
notification_filter.dbcc_classguid = GUID_DEVINTERFACE_USB_DEVICE;
if (_run_as_service) {
notification_handle = RegisterDeviceNotification((HANDLE)service_get_status_handle(),
¬ification_filter,
DEVICE_NOTIFY_SERVICE_HANDLE);
} else {
if (message_pump_start() < 0) {
// FIXME: set service_exit_code
goto error_pipe_add;
}
notification_handle = RegisterDeviceNotification(_message_pump_hwnd,
¬ification_filter,
DEVICE_NOTIFY_WINDOW_HANDLE);
}
if (notification_handle == NULL) {
// FIXME: set service_exit_code
rc = ERRNO_WINAPI_OFFSET + GetLastError();
log_error("Could not register for device notification: %s (%d)",
get_errno_name(rc), rc);
goto error_notification;
}
if (network_init() < 0) {
// FIXME: set service_exit_code
goto error_network;
}
// running
if (_run_as_service) {
service_set_status(SERVICE_RUNNING, NO_ERROR);
}
if (event_run(network_cleanup_clients_and_zombies) < 0) {
// FIXME: set service_exit_code
goto error_run;
}
exit_code = EXIT_SUCCESS;
error_run:
network_exit();
error_network:
UnregisterDeviceNotification(notification_handle);
error_notification:
if (!_run_as_service) {
message_pump_stop();
}
event_remove_source(_notification_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC);
error_pipe_add:
pipe_destroy(&_notification_pipe);
error_pipe:
usb_exit();
error_usb:
hardware_exit();
error_hardware:
event_exit();
error_event:
log_info("Brick Daemon %s stopped", VERSION_STRING);
error:
if (!_run_as_service) {
// unregister the console handler before exiting the log. otherwise a
// control event might be send to the control handler after the log
// is not available anymore and the control handler tries to write a
// log messages triggering a crash. this situation could easily be
// created by clicking the close button of the command prompt window
// while the getch call is waiting for the user to press a key.
SetConsoleCtrlHandler(console_ctrl_handler, FALSE);
}
log_exit();
config_exit();
if (_run_as_service) {
// because the service process can be terminated at any time after
// entering SERVICE_STOPPED state the mutex is closed beforehand,
// even though this creates a tiny time window in which the service
// is still running but the mutex is not held anymore
if (mutex_handle != NULL) {
CloseHandle(mutex_handle);
}
// service is now stopped
service_set_status(SERVICE_STOPPED, service_exit_code);
} else {
if (_pause_before_exit) {
printf("Press any key to exit...\n");
getch();
}
if (mutex_handle != NULL) {
CloseHandle(mutex_handle);
}
}
return exit_code;
}
static void
s_delete_pipe (void *argument)
{
pipe_t *pipe = (pipe_t *) argument;
pipe_destroy (&pipe);
}
// public API
APIE process_spawn(ObjectID executable_id, ObjectID arguments_id,
ObjectID environment_id, ObjectID working_directory_id,
uint32_t uid, uint32_t gid, ObjectID stdin_id,
ObjectID stdout_id, ObjectID stderr_id, Session *session,
uint16_t object_create_flags, bool release_on_death,
ProcessStateChangedFunction state_changed, void *opaque,
ObjectID *id, Process **object) {
int phase = 0;
APIE error_code;
String *executable;
List *arguments;
Array arguments_array;
int i;
char **item;
List *environment;
Array environment_array;
String *working_directory;
File *stdin;
File *stdout;
File *stderr;
pid_t pid;
int status_pipe[2];
int sc_open_max;
FILE *log_file;
Process *process;
// acquire and lock executable string object
error_code = string_get_acquired_and_locked(executable_id, &executable);
if (error_code != API_E_SUCCESS) {
goto cleanup;
}
phase = 1;
if (*executable->buffer == '\0') {
error_code = API_E_INVALID_PARAMETER;
log_warn("Cannot spawn child process using empty executable name");
goto cleanup;
}
// lock arguments list object
error_code = list_get_acquired_and_locked(arguments_id, OBJECT_TYPE_STRING,
&arguments);
if (error_code != API_E_SUCCESS) {
goto cleanup;
}
phase = 2;
// prepare arguments array for execvpe
if (array_create(&arguments_array, 1 + arguments->items.count + 1, sizeof(char *), true) < 0) {
error_code = api_get_error_code_from_errno();
log_error("Could not create arguments array for spawning child process (executable: %s): %s (%d)",
executable->buffer, get_errno_name(errno), errno);
goto cleanup;
}
phase = 3;
item = array_append(&arguments_array);
if (item == NULL) {
error_code = api_get_error_code_from_errno();
log_error("Could not append to arguments array for spawning child process (executable: %s): %s (%d)",
executable->buffer, get_errno_name(errno), errno);
goto cleanup;
}
*item = executable->buffer;
for (i = 0; i < arguments->items.count; ++i) {
item = array_append(&arguments_array);
if (item == NULL) {
error_code = api_get_error_code_from_errno();
log_error("Could not append to arguments array for spawning child process (executable: %s): %s (%d)",
executable->buffer, get_errno_name(errno), errno);
goto cleanup;
}
*item = (*(String **)array_get(&arguments->items, i))->buffer;
}
item = array_append(&arguments_array);
if (item == NULL) {
error_code = api_get_error_code_from_errno();
log_error("Could not append to arguments array for spawning child process (executable: %s): %s (%d)",
executable->buffer, get_errno_name(errno), errno);
goto cleanup;
}
*item = NULL;
// lock environment list object
error_code = list_get_acquired_and_locked(environment_id, OBJECT_TYPE_STRING,
&environment);
if (error_code != API_E_SUCCESS) {
goto cleanup;
}
phase = 4;
// prepare environment array for execvpe
if (array_create(&environment_array, environment->items.count + 1, sizeof(char *), true) < 0) {
error_code = api_get_error_code_from_errno();
log_error("Could not create environment array for spawning child process (executable: %s): %s (%d)",
executable->buffer, get_errno_name(errno), errno);
goto cleanup;
}
phase = 5;
for (i = 0; i < environment->items.count; ++i) {
item = array_append(&environment_array);
if (item == NULL) {
error_code = api_get_error_code_from_errno();
log_error("Could not append to environment array for spawning child process (executable: %s): %s (%d)",
executable->buffer, get_errno_name(errno), errno);
goto cleanup;
}
// FIXME: if item is not <name>=<value>, but just <name> then use the parent <value>
*item = (*(String **)array_get(&environment->items, i))->buffer;
}
item = array_append(&environment_array);
if (item == NULL) {
error_code = api_get_error_code_from_errno();
log_error("Could not append to environment array for spawning child process (executable: %s): %s (%d)",
executable->buffer, get_errno_name(errno), errno);
goto cleanup;
}
*item = NULL;
// acquire and lock working directory string object
error_code = string_get_acquired_and_locked(working_directory_id, &working_directory);
if (error_code != API_E_SUCCESS) {
goto cleanup;
}
phase = 6;
if (*working_directory->buffer == '\0') {
error_code = API_E_INVALID_PARAMETER;
log_warn("Cannot spawn child process (executable: %s) using empty working directory name",
executable->buffer);
goto cleanup;
}
if (*working_directory->buffer != '/') {
error_code = API_E_INVALID_PARAMETER;
log_warn("Cannot spawn child process (executable: %s) using working directory with relative name '%s'",
executable->buffer, working_directory->buffer);
goto cleanup;
}
// acquire stdin file object
error_code = file_get_acquired(stdin_id, &stdin);
if (error_code != API_E_SUCCESS) {
goto cleanup;
}
phase = 7;
// acquire stdout file object
error_code = file_get_acquired(stdout_id, &stdout);
if (error_code != API_E_SUCCESS) {
goto cleanup;
}
phase = 8;
// acquire stderr file object
error_code = file_get_acquired(stderr_id, &stderr);
if (error_code != API_E_SUCCESS) {
goto cleanup;
}
phase = 9;
// create status pipe
if (pipe(status_pipe) < 0) {
error_code = api_get_error_code_from_errno();
log_error("Could not create status pipe for spawning child process (executable: %s): %s (%d)",
executable->buffer, get_errno_name(errno), errno);
goto cleanup;
}
phase = 10;
// fork
log_debug("Forking to spawn child process (executable: %s)", executable->buffer);
error_code = process_fork(&pid);
if (error_code != API_E_SUCCESS) {
goto cleanup;
}
if (pid == 0) { // child
close(status_pipe[0]);
// change user and groups
error_code = process_set_identity(uid, gid);
if (error_code != API_E_SUCCESS) {
goto child_error;
}
// change directory
if (chdir(working_directory->buffer) < 0) {
error_code = api_get_error_code_from_errno();
log_error("Could not change directory to '%s' for child process (executable: %s, pid: %u): %s (%d)",
working_directory->buffer, executable->buffer, getpid(), get_errno_name(errno), errno);
goto child_error;
}
// get open FD limit
sc_open_max = sysconf(_SC_OPEN_MAX);
if (sc_open_max < 0) {
error_code = api_get_error_code_from_errno();
log_error("Could not get SC_OPEN_MAX value: %s (%d)",
get_errno_name(errno), errno);
goto child_error;
}
// redirect stdin
if (dup2(file_get_read_handle(stdin), STDIN_FILENO) != STDIN_FILENO) {
error_code = api_get_error_code_from_errno();
log_error("Could not redirect stdin for child process (executable: %s, pid: %u): %s (%d)",
executable->buffer, getpid(), get_errno_name(errno), errno);
goto child_error;
}
// redirect stdout
if (dup2(file_get_write_handle(stdout), STDOUT_FILENO) != STDOUT_FILENO) {
error_code = api_get_error_code_from_errno();
log_error("Could not redirect stdout for child process (executable: %s, pid: %u): %s (%d)",
executable->buffer, getpid(), get_errno_name(errno), errno);
goto child_error;
}
// stderr is the default log output in non-daemon mode. if this is
// the case then disable the log output before redirecting stderr to
// avoid polluting stderr for the new process
log_file = log_get_file();
if (log_file != NULL && fileno(log_file) == STDERR_FILENO) {
log_debug("Disable logging to stderr for child process (executable: %s, pid: %u)",
executable->buffer, getpid());
log_set_file(NULL);
}
// redirect stderr
if (dup2(file_get_write_handle(stderr), STDERR_FILENO) != STDERR_FILENO) {
error_code = api_get_error_code_from_errno();
log_error("Could not redirect stderr for child process (executable: %s, pid: %u): %s (%d)",
executable->buffer, getpid(), get_errno_name(errno), errno);
goto child_error;
}
// notify parent
if (robust_write(status_pipe[1], &error_code, sizeof(error_code)) < 0) {
error_code = api_get_error_code_from_errno();
log_error("Could not write to status pipe for child process (executable: %s, pid: %u): %s (%d)",
executable->buffer, getpid(), get_errno_name(errno), errno);
goto child_error;
}
// disable log output. if stderr was not the current log output then
// the log file is still open at this point. the next step is to close
// all remaining file descriptors. just for good measure disable the
// log output beforehand
log_set_file(NULL);
// close all file descriptors except the std* ones
for (i = STDERR_FILENO + 1; i < sc_open_max; ++i) {
close(i);
}
// execvpe only returns in case of an error
execvpe(executable->buffer, (char **)arguments_array.bytes, (char **)environment_array.bytes);
if (errno == ENOENT) {
_exit(PROCESS_E_DOES_NOT_EXIST);
} else {
_exit(PROCESS_E_CANNOT_EXECUTE);
}
child_error:
// notify parent in all cases
if (robust_write(status_pipe[1], &error_code, sizeof(error_code)) < 0) {
log_error("Could not write to status pipe for child process (executable: %s, pid: %u): %s (%d)",
executable->buffer, getpid(), get_errno_name(errno), errno);
}
close(status_pipe[1]);
_exit(PROCESS_E_INTERNAL_ERROR);
}
phase = 11;
// wait for child to start successfully
if (robust_read(status_pipe[0], &error_code, sizeof(error_code)) < 0) {
error_code = api_get_error_code_from_errno();
log_error("Could not read from status pipe for child process (executable: %s, pid: %u): %s (%d)",
executable->buffer, pid, get_errno_name(errno), errno);
goto cleanup;
}
if (error_code != API_E_SUCCESS) {
goto cleanup;
}
// create process object
process = calloc(1, sizeof(Process));
if (process == NULL) {
error_code = API_E_NO_FREE_MEMORY;
log_error("Could not allocate process object: %s (%d)",
get_errno_name(ENOMEM), ENOMEM);
goto cleanup;
}
phase = 12;
// setup process object
process->executable = executable;
process->arguments = arguments;
process->environment = environment;
process->working_directory = working_directory;
process->uid = uid;
process->gid = gid;
process->pid = pid;
process->stdin = stdin;
process->stdout = stdout;
process->stderr = stderr;
process->release_on_death = release_on_death;
process->state_changed = state_changed;
process->opaque = opaque;
process->state = PROCESS_STATE_RUNNING;
process->timestamp = time(NULL);
process->exit_code = 0; // invalid
if (pipe_create(&process->state_change_pipe, 0) < 0) {
error_code = api_get_error_code_from_errno();
log_error("Could not create state change pipe child process (executable: %s, pid: %u): %s (%d)",
executable->buffer, pid, get_errno_name(errno), errno);
goto cleanup;
}
phase = 13;
if (event_add_source(process->state_change_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC,
EVENT_READ, process_handle_state_change, process) < 0) {
goto cleanup;
}
phase = 14;
// create process object
error_code = object_create(&process->base,
OBJECT_TYPE_PROCESS,
session,
object_create_flags |
OBJECT_CREATE_FLAG_INTERNAL,
process_destroy,
process_signature);
if (error_code != API_E_SUCCESS) {
goto cleanup;
}
phase = 15;
if (id != NULL) {
*id = process->base.id;
}
if (object != NULL) {
*object = process;
}
// start thread to wait for child process state changes
thread_create(&process->wait_thread, process_wait, process);
log_debug("Spawned process object (id: %u, executable: %s, pid: %u)",
process->base.id, executable->buffer, process->pid);
close(status_pipe[0]);
close(status_pipe[1]);
array_destroy(&arguments_array, NULL);
array_destroy(&environment_array, NULL);
cleanup:
switch (phase) { // no breaks, all cases fall through intentionally
case 14:
event_remove_source(process->state_change_pipe.read_end, EVENT_SOURCE_TYPE_GENERIC);
case 13:
pipe_destroy(&process->state_change_pipe);
case 12:
free(process);
case 11:
kill(pid, SIGKILL);
case 10:
close(status_pipe[0]);
close(status_pipe[1]);
case 9:
file_release(stderr);
case 8:
file_release(stdout);
case 7:
file_release(stdin);
case 6:
string_unlock_and_release(working_directory);
case 5:
array_destroy(&environment_array, NULL);
case 4:
list_unlock_and_release(environment);
case 3:
array_destroy(&arguments_array, NULL);
case 2:
list_unlock_and_release(arguments);
case 1:
string_unlock_and_release(executable);
default:
break;
}
return phase == 15 ? API_E_SUCCESS : error_code;
}
/*
* Create a new instance of a pipe and return a pointer to
* its instance structure.
*/
pipe_instance_t *
pipe_new(void)
{
pipe_instance_t *npp;
int failed;
DWORD result;
TRACE0(ENTER, "Entering pipe_new");
npp = malloc(sizeof(*npp));
if (npp == NULL)
return NULL;
ZeroMemory(npp, sizeof(*npp));
failed = 1;
/* XXX buffer management */
npp->rsize = PIPE_READBUF_SIZE;
npp->state = PIPE_STATE_INIT;
InitializeCriticalSection(&npp->rcs);
/*
* Create the event object used to signal connection completion.
*/
npp->cevent = CreateEvent(NULL, FALSE, FALSE, NULL);
if (npp->cevent == NULL) {
result = GetLastError();
TRACE1(CONFIGURATION, "Error %u creating event", result);
goto fail;
}
npp->cov.hEvent = npp->cevent;
/*
* Create the event object used to signal read completion.
*/
npp->revent = CreateEvent(NULL, FALSE, FALSE, NULL);
if (npp->revent == NULL) {
result = GetLastError();
TRACE1(CONFIGURATION, "Error %u creating event", result);
goto fail;
}
npp->rov.hEvent = npp->revent;
/*
* Create the instance of the named pipe itself.
*/
npp->pipe = CreateNamedPipeA(XORPRTM_PIPENAME,
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_MESSAGE, PIPE_INSTANCES, 0, 0,
XORPRTM_PIPETIMEOUT, NULL);
if (npp->pipe == NULL) {
result = GetLastError();
TRACE1(CONFIGURATION, "Error %u creating named pipe", result);
goto fail;
}
failed = 0;
fail:
if (failed) {
pipe_destroy(npp);
npp = NULL;
}
TRACE1(ENTER, "Leaving pipe_new %p", npp);
return (npp);
}
