GCC Code Coverage Report

Line	Branch	Exec	Source
1			/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
2			*
3			* Copyright 2012 Red Hat, Inc,
4			*
5			* This program is free software; you can redistribute it and/or modify
6			* it under the terms of the GNU General Public License as published by
7			* the Free Software Foundation; either version 2 of the License, or
8			* (at your option) any later version.
9			*
10			* This program is distributed in the hope that it will be useful,
11			* but WITHOUT ANY WARRANTY; without even the implied warranty of
12			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13			* GNU General Public License for more details.
14			*
15			* You should have received a copy of the GNU General Public License
16			* along with this program; if not, see <http://www.gnu.org/licenses/>.
17			*
18			* Author: Marek Kasik <mkasik@redhat.com>
19			*/
20
21			#include "config.h"
22
23			#include "pp-host.h"
24
25			#include <glib/gi18n.h>
26
27			#define BUFFER_LENGTH 1024
28
29			typedef struct
30			{
31			gchar *hostname;
32			gint port;
33			} PpHostPrivate;
34
35		✗	G_DEFINE_TYPE_WITH_PRIVATE (PpHost, pp_host, G_TYPE_OBJECT);
36
37			enum {
38			PROP_0 = 0,
39			PROP_HOSTNAME,
40			PROP_PORT,
41			};
42
43			enum {
44			AUTHENTICATION_REQUIRED,
45			LAST_SIGNAL
46			};
47
48			static guint signals[LAST_SIGNAL] = { 0 };
49
50			static void
51		✗	pp_host_finalize (GObject *object)
52			{
53		✗	PpHost *self = PP_HOST (object);
54		✗	PpHostPrivate *priv = pp_host_get_instance_private (self);
55
56		✗	g_clear_pointer (&priv->hostname, g_free);
57
58		✗	G_OBJECT_CLASS (pp_host_parent_class)->finalize (object);
59		✗	}
60
61			static void
62		✗	pp_host_get_property (GObject *object,
63			guint prop_id,
64			GValue *value,
65			GParamSpec *param_spec)
66			{
67		✗	PpHost *self = PP_HOST (object);
68		✗	PpHostPrivate *priv = pp_host_get_instance_private (self);
69
70		✗	switch (prop_id)
71			{
72		✗	case PROP_HOSTNAME:
73		✗	g_value_set_string (value, priv->hostname);
74		✗	break;
75		✗	case PROP_PORT:
76		✗	g_value_set_int (value, priv->port);
77		✗	break;
78		✗	default:
79		✗	G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
80			prop_id,
81			param_spec);
82		✗	break;
83			}
84		✗	}
85
86			static void
87		✗	pp_host_set_property (GObject *object,
88			guint prop_id,
89			const GValue *value,
90			GParamSpec *param_spec)
91			{
92		✗	PpHost *self = PP_HOST (object);
93		✗	PpHostPrivate *priv = pp_host_get_instance_private (self);
94
95		✗	switch (prop_id)
96			{
97		✗	case PROP_HOSTNAME:
98		✗	g_free (priv->hostname);
99		✗	priv->hostname = g_value_dup_string (value);
100		✗	break;
101		✗	case PROP_PORT:
102		✗	priv->port = g_value_get_int (value);
103		✗	break;
104		✗	default:
105		✗	G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
106			prop_id,
107			param_spec);
108		✗	break;
109			}
110		✗	}
111
112			static void
113		✗	pp_host_class_init (PpHostClass *klass)
114			{
115		✗	GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
116
117		✗	gobject_class->set_property = pp_host_set_property;
118		✗	gobject_class->get_property = pp_host_get_property;
119		✗	gobject_class->finalize = pp_host_finalize;
120
121		✗	g_object_class_install_property (gobject_class, PROP_HOSTNAME,
122			g_param_spec_string ("hostname",
123			"Hostname",
124			"The hostname",
125			NULL,
126			G_PARAM_READWRITE));
127
128		✗	g_object_class_install_property (gobject_class, PROP_PORT,
129			g_param_spec_int ("port",
130			"Port",
131			"The port",
132			-1, G_MAXINT32, PP_HOST_UNSET_PORT,
133			G_PARAM_READWRITE));
134
135		✗	signals[AUTHENTICATION_REQUIRED] =
136		✗	g_signal_new ("authentication-required",
137			G_TYPE_FROM_CLASS (klass),
138			G_SIGNAL_RUN_LAST,
139			0,
140			NULL, NULL, NULL,
141			G_TYPE_NONE, 0);
142		✗	}
143
144			static void
145		✗	pp_host_init (PpHost *self)
146			{
147		✗	PpHostPrivate *priv = pp_host_get_instance_private (self);
148		✗	priv->port = PP_HOST_UNSET_PORT;
149		✗	}
150
151			PpHost *
152		✗	pp_host_new (const gchar *hostname)
153			{
154		✗	return g_object_new (PP_TYPE_HOST,
155			"hostname", hostname,
156			NULL);
157			}
158
159			static gchar **
160		✗	line_split (gchar *line)
161			{
162		✗	gboolean escaped = FALSE;
163		✗	gboolean quoted = FALSE;
164		✗	gboolean in_word = FALSE;
165		✗	gchar **words = NULL;
166		✗	gchar **result = NULL;
167		✗	g_autofree gchar *buffer = NULL;
168			gchar ch;
169		✗	gint n = 0;
170		✗	gint i, j = 0, k = 0;
171
172		✗	if (line)
173			{
174		✗	n = strlen (line);
175		✗	words = g_new0 (gchar *, n + 1);
176		✗	buffer = g_new0 (gchar, n + 1);
177
178		✗	for (i = 0; i < n; i++)
179			{
180		✗	ch = line[i];
181
182		✗	if (escaped)
183			{
184		✗	buffer[k++] = ch;
185		✗	escaped = FALSE;
186		✗	continue;
187			}
188
189		✗	if (ch == '\\')
190			{
191		✗	in_word = TRUE;
192		✗	escaped = TRUE;
193		✗	continue;
194			}
195
196		✗	if (in_word)
197			{
198		✗	if (quoted)
199			{
200		✗	if (ch == '"')
201		✗	quoted = FALSE;
202			else
203		✗	buffer[k++] = ch;
204			}
205		✗	else if (g_ascii_isspace (ch))
206			{
207		✗	words[j++] = g_strdup (buffer);
208		✗	memset (buffer, 0, n + 1);
209		✗	k = 0;
210		✗	in_word = FALSE;
211			}
212		✗	else if (ch == '"')
213		✗	quoted = TRUE;
214			else
215		✗	buffer[k++] = ch;
216			}
217			else
218			{
219		✗	if (ch == '"')
220			{
221		✗	in_word = TRUE;
222		✗	quoted = TRUE;
223			}
224		✗	else if (!g_ascii_isspace (ch))
225			{
226		✗	in_word = TRUE;
227		✗	buffer[k++] = ch;
228			}
229			}
230			}
231			}
232
233		✗	if (buffer && buffer[0] != '\0')
234		✗	words[j++] = g_strdup (buffer);
235
236		✗	result = g_strdupv (words);
237		✗	g_strfreev (words);
238
239		✗	return result;
240			}
241
242			static void
243		✗	_pp_host_get_snmp_devices_thread (GTask *task,
244			gpointer source_object,
245			gpointer task_data,
246			GCancellable *cancellable)
247			{
248		✗	PpHost *self = source_object;
249		✗	PpHostPrivate *priv = pp_host_get_instance_private (self);
250		✗	g_autoptr(GPtrArray) devices = NULL;
251		✗	g_autoptr(GError) error = NULL;
252		✗	g_auto(GStrv) argv = NULL;
253		✗	g_autofree gchar *stdout_string = NULL;
254			gint exit_status;
255
256		✗	devices = g_ptr_array_new_with_free_func (g_object_unref);
257
258		✗	argv = g_new0 (gchar *, 3);
259		✗	argv[0] = g_strdup ("/usr/lib/cups/backend/snmp");
260		✗	argv[1] = g_strdup (priv->hostname);
261
262			/* Use SNMP to get printer's informations */
263		✗	g_spawn_sync (NULL,
264			argv,
265			NULL,
266			G_SPAWN_STDERR_TO_DEV_NULL,
267			NULL,
268			NULL,
269			&stdout_string,
270			NULL,
271			&exit_status,
272			&error);
273
274		✗	if (exit_status == 0 && stdout_string)
275			{
276		✗	g_auto(GStrv) printer_informations = NULL;
277			gint length;
278
279		✗	printer_informations = line_split (stdout_string);
280		✗	length = g_strv_length (printer_informations);
281
282		✗	if (length >= 4)
283			{
284		✗	g_autofree gchar *device_name = NULL;
285			gboolean is_network_device;
286			PpPrintDevice *device;
287
288		✗	device_name = g_strdup (printer_informations[3]);
289		✗	g_strcanon (device_name, ALLOWED_CHARACTERS, '-');
290		✗	is_network_device = g_strcmp0 (printer_informations[0], "network") == 0;
291
292		✗	device = g_object_new (PP_TYPE_PRINT_DEVICE,
293			"is-network-device", is_network_device,
294		✗	"device-uri", printer_informations[1],
295		✗	"device-make-and-model", printer_informations[2],
296		✗	"device-info", printer_informations[3],
297			"acquisition-method", ACQUISITION_METHOD_SNMP,
298			"device-name", device_name,
299			NULL);
300
301		✗	if (length >= 5 && printer_informations[4][0] != '\0')
302		✗	g_object_set (device, "device-id", printer_informations[4], NULL);
303
304		✗	if (length >= 6 && printer_informations[5][0] != '\0')
305		✗	g_object_set (device, "device-location", printer_informations[5], NULL);
306
307		✗	g_ptr_array_add (devices, device);
308			}
309			}
310
311		✗	g_task_return_pointer (task, g_ptr_array_ref (devices), (GDestroyNotify) g_ptr_array_unref);
312		✗	}
313
314			void
315		✗	pp_host_get_snmp_devices_async (PpHost *self,
316			GCancellable *cancellable,
317			GAsyncReadyCallback callback,
318			gpointer user_data)
319			{
320		✗	g_autoptr(GTask) task = NULL;
321
322		✗	task = g_task_new (self, cancellable, callback, user_data);
323		✗	g_task_run_in_thread (task, _pp_host_get_snmp_devices_thread);
324		✗	}
325
326			GPtrArray *
327		✗	pp_host_get_snmp_devices_finish (PpHost *self,
328			GAsyncResult *res,
329			GError **error)
330			{
331		✗	g_return_val_if_fail (g_task_is_valid (res, self), NULL);
332		✗	g_return_val_if_fail (error == NULL || *error == NULL, NULL);
333		✗	return g_task_propagate_pointer (G_TASK (res), error);
334			}
335
336			static void
337		✗	_pp_host_get_remote_cups_devices_thread (GTask *task,
338			gpointer source_object,
339			gpointer task_data,
340			GCancellable *cancellable)
341			{
342		✗	cups_dest_t *dests = NULL;
343		✗	PpHost *self = (PpHost *) source_object;
344		✗	PpHostPrivate *priv = pp_host_get_instance_private (self);
345		✗	g_autoptr(GPtrArray) devices = NULL;
346			http_t *http;
347		✗	gint num_of_devices = 0;
348			gint port;
349			gint i;
350
351		✗	devices = g_ptr_array_new_with_free_func (g_object_unref);
352
353		✗	if (priv->port == PP_HOST_UNSET_PORT)
354		✗	port = PP_HOST_DEFAULT_IPP_PORT;
355			else
356		✗	port = priv->port;
357
358			/* Connect to remote CUPS server and get its devices */
359			#ifdef HAVE_CUPS_HTTPCONNECT2
360		✗	http = httpConnect2 (priv->hostname, port, NULL, AF_UNSPEC,
361			HTTP_ENCRYPTION_IF_REQUESTED, 1, 30000, NULL);
362			#else
363			http = httpConnect (priv->hostname, port);
364			#endif
365		✗	if (http)
366			{
367		✗	num_of_devices = cupsGetDests2 (http, &dests);
368		✗	if (num_of_devices > 0)
369			{
370		✗	for (i = 0; i < num_of_devices; i++)
371			{
372		✗	g_autofree gchar *device_uri = NULL;
373			const char *device_location;
374			PpPrintDevice *device;
375
376		✗	device_uri = g_strdup_printf ("ipp://%s:%d/printers/%s",
377			priv->hostname,
378			port,
379		✗	dests[i].name);
380
381		✗	device_location = cupsGetOption ("printer-location",
382		✗	dests[i].num_options,
383		✗	dests[i].options);
384
385		✗	device = g_object_new (PP_TYPE_PRINT_DEVICE,
386			"is-network-device", TRUE,
387			"device-uri", device_uri,
388		✗	"device-name", dests[i].name,
389			"device-location", device_location,
390			"host-name", priv->hostname,
391			"host-port", port,
392			"acquisition-method", ACQUISITION_METHOD_REMOTE_CUPS_SERVER,
393			NULL);
394		✗	g_ptr_array_add (devices, device);
395			}
396			}
397
398		✗	httpClose (http);
399			}
400
401		✗	g_task_return_pointer (task, g_ptr_array_ref (devices), (GDestroyNotify) g_ptr_array_unref);
402		✗	}
403
404			void
405		✗	pp_host_get_remote_cups_devices_async (PpHost *self,
406			GCancellable *cancellable,
407			GAsyncReadyCallback callback,
408			gpointer user_data)
409			{
410		✗	g_autoptr(GTask) task = NULL;
411
412		✗	task = g_task_new (self, cancellable, callback, user_data);
413		✗	g_task_run_in_thread (task, _pp_host_get_remote_cups_devices_thread);
414		✗	}
415
416			GPtrArray *
417		✗	pp_host_get_remote_cups_devices_finish (PpHost *self,
418			GAsyncResult *res,
419			GError **error)
420			{
421		✗	g_return_val_if_fail (g_task_is_valid (res, self), NULL);
422		✗	g_return_val_if_fail (error == NULL || *error == NULL, NULL);
423		✗	return g_task_propagate_pointer (G_TASK (res), error);
424			}
425
426			typedef struct
427			{
428			PpHost *host;
429			gint port;
430			} JetDirectData;
431
432			static void
433		✗	jetdirect_data_free (JetDirectData *data)
434			{
435		✗	if (data != NULL)
436			{
437		✗	g_clear_object (&data->host);
438		✗	g_free (data);
439			}
440		✗	}
441
442			static void
443		✗	jetdirect_connection_test_cb (GObject *source_object,
444			GAsyncResult *res,
445			gpointer user_data)
446			{
447		✗	g_autoptr(GSocketConnection) connection = NULL;
448			PpHostPrivate *priv;
449			JetDirectData *data;
450		✗	g_autoptr(GPtrArray) devices = NULL;
451		✗	g_autoptr(GError) error = NULL;
452		✗	g_autoptr(GTask) task = G_TASK (user_data);
453
454		✗	data = g_task_get_task_data (task);
455		✗	priv = pp_host_get_instance_private (data->host);
456
457		✗	devices = g_ptr_array_new_with_free_func (g_object_unref);
458
459		✗	connection = g_socket_client_connect_to_host_finish (G_SOCKET_CLIENT (source_object),
460			res,
461			&error);
462
463		✗	if (connection != NULL)
464			{
465		✗	g_autofree gchar *device_uri = NULL;
466			PpPrintDevice *device;
467
468		✗	g_io_stream_close (G_IO_STREAM (connection), NULL, NULL);
469
470		✗	device_uri = g_strdup_printf ("socket://%s:%d",
471			priv->hostname,
472			data->port);
473
474		✗	device = g_object_new (PP_TYPE_PRINT_DEVICE,
475			"is-network-device", TRUE,
476			"device-uri", device_uri,
477			/* Translators: The found device is a JetDirect printer */
478			"device-name", _("JetDirect Printer"),
479			"host-name", priv->hostname,
480			"host-port", data->port,
481			"acquisition-method", ACQUISITION_METHOD_JETDIRECT,
482			NULL);
483		✗	g_ptr_array_add (devices, device);
484			}
485
486		✗	g_task_return_pointer (task, g_ptr_array_ref (devices), (GDestroyNotify) g_ptr_array_unref);
487		✗	}
488
489			/* Test whether given host has an AppSocket/HP JetDirect printer connected.
490			See http://en.wikipedia.org/wiki/JetDirect
491			http://www.cups.org/documentation.php/network.html */
492			void
493		✗	pp_host_get_jetdirect_devices_async (PpHost *self,
494			GCancellable *cancellable,
495			GAsyncReadyCallback callback,
496			gpointer user_data)
497			{
498		✗	PpHostPrivate *priv = pp_host_get_instance_private (self);
499			JetDirectData *data;
500		✗	g_autoptr(GTask) task = NULL;
501		✗	g_autofree gchar *address = NULL;
502
503		✗	data = g_new0 (JetDirectData, 1);
504		✗	data->host = g_object_ref (self);
505
506		✗	if (priv->port == PP_HOST_UNSET_PORT)
507		✗	data->port = PP_HOST_DEFAULT_JETDIRECT_PORT;
508			else
509		✗	data->port = priv->port;
510
511		✗	task = g_task_new (G_OBJECT (self), cancellable, callback, user_data);
512		✗	g_task_set_task_data (task, data, (GDestroyNotify) jetdirect_data_free);
513
514		✗	address = g_strdup_printf ("%s:%d", priv->hostname, data->port);
515		✗	if (address != NULL && address[0] != '/')
516		✗	{
517		✗	g_autoptr(GSocketClient) client = NULL;
518
519		✗	client = g_socket_client_new ();
520
521		✗	g_socket_client_connect_to_host_async (client,
522			address,
523		✗	data->port,
524			cancellable,
525			jetdirect_connection_test_cb,
526			g_steal_pointer (&task));
527			}
528			else
529			{
530		✗	GPtrArray *devices = g_ptr_array_new_with_free_func (g_object_unref);
531		✗	g_task_return_pointer (task, devices, (GDestroyNotify) g_ptr_array_unref);
532			}
533		✗	}
534
535			GPtrArray *
536		✗	pp_host_get_jetdirect_devices_finish (PpHost *self,
537			GAsyncResult *res,
538			GError **error)
539			{
540		✗	g_return_val_if_fail (g_task_is_valid (res, self), NULL);
541		✗	g_return_val_if_fail (error == NULL || *error == NULL, NULL);
542		✗	return g_task_propagate_pointer (G_TASK (res), error);
543			}
544
545			static gboolean
546		✗	test_lpd_queue (GSocketClient *client,
547			gchar *address,
548			gint port,
549			GCancellable *cancellable,
550			gchar *queue_name)
551			{
552		✗	g_autoptr(GSocketConnection) connection = NULL;
553		✗	gboolean result = FALSE;
554		✗	g_autoptr(GError) error = NULL;
555
556		✗	connection = g_socket_client_connect_to_host (client,
557			address,
558			port,
559			cancellable,
560			&error);
561
562		✗	if (connection != NULL)
563			{
564		✗	if (G_IS_TCP_CONNECTION (connection))
565			{
566			GOutputStream *output;
567			GInputStream *input;
568			gssize bytes_read, bytes_written;
569			gchar buffer[BUFFER_LENGTH];
570			gint length;
571
572		✗	output = g_io_stream_get_output_stream (G_IO_STREAM (connection));
573		✗	input = g_io_stream_get_input_stream (G_IO_STREAM (connection));
574
575			/* This LPD command is explained in RFC 1179, section 5.2 */
576		✗	length = g_snprintf (buffer, BUFFER_LENGTH, "\2%s\n", queue_name);
577
578		✗	bytes_written = g_output_stream_write (output,
579			buffer,
580			length,
581			NULL,
582			&error);
583
584		✗	if (bytes_written != -1)
585			{
586		✗	bytes_read = g_input_stream_read (input,
587			buffer,
588			BUFFER_LENGTH,
589			NULL,
590			&error);
591
592		✗	if (bytes_read != -1)
593			{
594		✗	if (bytes_read > 0 && buffer[0] == 0)
595			{
596			/* This LPD command is explained in RFC 1179, section 6.1 */
597		✗	length = g_snprintf (buffer, BUFFER_LENGTH, "\1\n");
598
599		✗	bytes_written = g_output_stream_write (output,
600			buffer,
601			length,
602			NULL,
603			&error);
604
605		✗	result = TRUE;
606			}
607			}
608			}
609			}
610
611		✗	g_io_stream_close (G_IO_STREAM (connection), NULL, NULL);
612			}
613
614		✗	return result;
615			}
616
617			static void
618		✗	_pp_host_get_lpd_devices_thread (GTask *task,
619			gpointer source_object,
620			gpointer task_data,
621			GCancellable *cancellable)
622			{
623		✗	g_autoptr(GSocketConnection) connection = NULL;
624		✗	PpHost *self = source_object;
625		✗	PpHostPrivate *priv = pp_host_get_instance_private (self);
626		✗	g_autoptr(GPtrArray) devices = NULL;
627		✗	g_autoptr(GSocketClient) client = NULL;
628		✗	g_autoptr(GError) error = NULL;
629		✗	GList *candidates = NULL;
630			GList *iter;
631		✗	gchar *found_queue = NULL;
632			gchar *candidate;
633		✗	g_autofree gchar *address = NULL;
634			gint port;
635			gint i;
636
637		✗	if (priv->port == PP_HOST_UNSET_PORT)
638		✗	port = PP_HOST_DEFAULT_LPD_PORT;
639			else
640		✗	port = priv->port;
641
642		✗	devices = g_ptr_array_new_with_free_func (g_object_unref);
643
644		✗	address = g_strdup_printf ("%s:%d", priv->hostname, port);
645		✗	if (address == NULL || address[0] == '/')
646			{
647		✗	g_task_return_pointer (task, g_ptr_array_ref (devices), (GDestroyNotify) g_ptr_array_unref);
648		✗	return;
649			}
650
651		✗	client = g_socket_client_new ();
652
653		✗	connection = g_socket_client_connect_to_host (client,
654			address,
655			port,
656			cancellable,
657			&error);
658
659		✗	if (connection != NULL)
660			{
661		✗	g_io_stream_close (G_IO_STREAM (connection), NULL, NULL);
662
663			/* Most of this list is taken from system-config-printer */
664		✗	candidates = g_list_append (candidates, g_strdup ("PASSTHRU"));
665		✗	candidates = g_list_append (candidates, g_strdup ("AUTO"));
666		✗	candidates = g_list_append (candidates, g_strdup ("BINPS"));
667		✗	candidates = g_list_append (candidates, g_strdup ("RAW"));
668		✗	candidates = g_list_append (candidates, g_strdup ("TEXT"));
669		✗	candidates = g_list_append (candidates, g_strdup ("ps"));
670		✗	candidates = g_list_append (candidates, g_strdup ("lp"));
671		✗	candidates = g_list_append (candidates, g_strdup ("PORT1"));
672
673		✗	for (i = 0; i < 8; i++)
674			{
675		✗	candidates = g_list_append (candidates, g_strdup_printf ("LPT%d", i));
676		✗	candidates = g_list_append (candidates, g_strdup_printf ("LPT%d_PASSTHRU", i));
677		✗	candidates = g_list_append (candidates, g_strdup_printf ("COM%d", i));
678		✗	candidates = g_list_append (candidates, g_strdup_printf ("COM%d_PASSTHRU", i));
679			}
680
681		✗	for (i = 0; i < 50; i++)
682		✗	candidates = g_list_append (candidates, g_strdup_printf ("pr%d", i));
683
684		✗	for (iter = candidates; iter != NULL; iter = iter->next)
685			{
686		✗	candidate = (gchar *) iter->data;
687
688		✗	if (test_lpd_queue (client,
689			address,
690			port,
691			cancellable,
692			candidate))
693			{
694		✗	found_queue = g_strdup (candidate);
695		✗	break;
696			}
697			}
698
699		✗	if (found_queue != NULL)
700			{
701		✗	g_autofree gchar *device_uri = NULL;
702			PpPrintDevice *device;
703
704		✗	device_uri = g_strdup_printf ("lpd://%s:%d/%s",
705			priv->hostname,
706			port,
707			found_queue);
708
709		✗	device = g_object_new (PP_TYPE_PRINT_DEVICE,
710			"is-network-device", TRUE,
711			"device-uri", device_uri,
712			/* Translators: The found device is a Line Printer Daemon printer */
713			"device-name", _("LPD Printer"),
714			"host-name", priv->hostname,
715			"host-port", port,
716			"acquisition-method", ACQUISITION_METHOD_LPD,
717			NULL);
718		✗	g_ptr_array_add (devices, device);
719			}
720
721		✗	g_list_free_full (candidates, g_free);
722			}
723
724		✗	g_task_return_pointer (task, g_ptr_array_ref (devices), (GDestroyNotify) g_ptr_array_unref);
725			}
726
727			void
728		✗	pp_host_get_lpd_devices_async (PpHost *self,
729			GCancellable *cancellable,
730			GAsyncReadyCallback callback,
731			gpointer user_data)
732			{
733		✗	g_autoptr(GTask) task = NULL;
734
735		✗	task = g_task_new (G_OBJECT (self), cancellable, callback, user_data);
736		✗	g_task_run_in_thread (task, _pp_host_get_lpd_devices_thread);
737		✗	}
738
739			GPtrArray *
740		✗	pp_host_get_lpd_devices_finish (PpHost *self,
741			GAsyncResult *res,
742			GError **error)
743			{
744		✗	g_return_val_if_fail (g_task_is_valid (res, self), NULL);
745		✗	g_return_val_if_fail (error == NULL || *error == NULL, NULL);
746		✗	return g_task_propagate_pointer (G_TASK (res), error);
747			}
748