[libsigrok.git] / src / session_file.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <string.h>
#include <stdlib.h>
#include <zip.h>
#include <errno.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"

/** @cond PRIVATE */
#define LOG_PREFIX "session-file"
/** @endcond */

/**
 * @file
 *
 * Loading and saving libsigrok session files.
 */

/**
 * @addtogroup grp_session
 *
 * @{
 */

extern SR_PRIV struct sr_dev_driver session_driver;
static int session_driver_initialized = 0;

#if !HAVE_ZIP_DISCARD
/* Replacement for zip_discard() if it isn't available. */
/** @private */
SR_PRIV void sr_zip_discard(struct zip *archive)
{
	if (zip_unchange_all(archive) < 0 || zip_close(archive) < 0)
		sr_err("Failed to discard ZIP archive: %s", zip_strerror(archive));
}
#endif

/**
 * Read metadata entries from a session archive.
 *
 * @param[in] archive An open ZIP archive.
 * @param[in] entry Stat buffer filled in for the metadata archive member.
 *
 * @return A new key/value store containing the session metadata.
 *
 * @private
 */
SR_PRIV GKeyFile *sr_sessionfile_read_metadata(struct zip *archive,
			const struct zip_stat *entry)
{
	GKeyFile *keyfile;
	GError *error;
	struct zip_file *zf;
	char *metabuf;
	int metalen;

	if (entry->size > G_MAXINT || !(metabuf = g_try_malloc(entry->size))) {
		sr_err("Metadata buffer allocation failed.");
		return NULL;
	}
	zf = zip_fopen_index(archive, entry->index, 0);
	if (!zf) {
		sr_err("Failed to open metadata: %s", zip_strerror(archive));
		g_free(metabuf);
		return NULL;
	}
	metalen = zip_fread(zf, metabuf, entry->size);
	if (metalen < 0) {
		sr_err("Failed to read metadata: %s", zip_file_strerror(zf));
		zip_fclose(zf);
		g_free(metabuf);
		return NULL;
	}
	zip_fclose(zf);

	keyfile = g_key_file_new();
	error = NULL;
	g_key_file_load_from_data(keyfile, metabuf, metalen,
			G_KEY_FILE_NONE, &error);
	g_free(metabuf);

	if (error) {
		sr_err("Failed to parse metadata: %s", error->message);
		g_error_free(error);
		g_key_file_free(keyfile);
		return NULL;
	}
	return keyfile;
}

/** @private */
SR_PRIV int sr_sessionfile_check(const char *filename)
{
	struct zip *archive;
	struct zip_file *zf;
	struct zip_stat zs;
	uint64_t version;
	int ret;
	char s[11];

	if (!filename)
		return SR_ERR_ARG;

	if (!g_file_test(filename, G_FILE_TEST_IS_REGULAR)) {
		sr_err("Not a regular file: %s.", filename);
		return SR_ERR;
	}

	if (!(archive = zip_open(filename, 0, NULL)))
		/* No logging: this can be used just to check if it's
		 * a sigrok session file or not. */
		return SR_ERR;

	/* check "version" */
	if (!(zf = zip_fopen(archive, "version", 0))) {
		sr_dbg("Not a sigrok session file: no version found.");
		zip_discard(archive);
		return SR_ERR;
	}
	ret = zip_fread(zf, s, sizeof(s) - 1);
	if (ret < 0) {
		sr_err("Failed to read version file: %s",
			zip_file_strerror(zf));
		zip_fclose(zf);
		zip_discard(archive);
		return SR_ERR;
	}
	zip_fclose(zf);
	s[ret] = '\0';
	version = g_ascii_strtoull(s, NULL, 10);
	if (version == 0 || version > 2) {
		sr_dbg("Cannot handle sigrok session file version %" PRIu64 ".",
			version);
		zip_discard(archive);
		return SR_ERR;
	}
	sr_spew("Detected sigrok session file version %" PRIu64 ".", version);

	/* read "metadata" */
	if (zip_stat(archive, "metadata", 0, &zs) < 0) {
		sr_dbg("Not a valid sigrok session file.");
		zip_discard(archive);
		return SR_ERR;
	}
	zip_discard(archive);

	return SR_OK;
}

/** @private */
SR_PRIV struct sr_dev_inst *sr_session_prepare_sdi(const char *filename, struct sr_session **session)
{
	struct sr_dev_inst *sdi = NULL;

	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->driver = &session_driver;
	sdi->status = SR_ST_INACTIVE;
	if (!session_driver_initialized) {
		/* first device, init the driver */
		session_driver_initialized = 1;
		sdi->driver->init(sdi->driver, NULL);
	}
	sr_dev_open(sdi);
	sr_session_dev_add(*session, sdi);
	(*session)->owned_devs = g_slist_append((*session)->owned_devs, sdi);
	sr_config_set(sdi, NULL, SR_CONF_SESSIONFILE,
			g_variant_new_string(filename));

	return sdi;
}

/**
 * Load the session from the specified filename.
 *
 * @param ctx The context in which to load the session.
 * @param filename The name of the session file to load.
 * @param session The session to load the file into.
 *
 * @retval SR_OK Success
 * @retval SR_ERR_MALLOC Memory allocation error
 * @retval SR_ERR_DATA Malformed session file
 * @retval SR_ERR This is not a session file
 */
SR_API int sr_session_load(struct sr_context *ctx, const char *filename,
		struct sr_session **session)
{
	GKeyFile *kf;
	GError *error;
	struct zip *archive;
	struct zip_stat zs;
	struct sr_dev_inst *sdi;
	struct sr_channel *ch;
	int ret, i, j;
	uint64_t tmp_u64;
	int total_channels, total_analog, k;
	GSList *l;
	int unitsize;
	char **sections, **keys, *val;
	char channelname[SR_MAX_CHANNELNAME_LEN + 1];
	gboolean file_has_logic;

	if ((ret = sr_sessionfile_check(filename)) != SR_OK)
		return ret;

	if (!(archive = zip_open(filename, 0, NULL)))
		return SR_ERR;

	if (zip_stat(archive, "metadata", 0, &zs) < 0) {
		zip_discard(archive);
		return SR_ERR;
	}
	kf = sr_sessionfile_read_metadata(archive, &zs);
	zip_discard(archive);
	if (!kf)
		return SR_ERR_DATA;

	if ((ret = sr_session_new(ctx, session)) != SR_OK) {
		g_key_file_free(kf);
		return ret;
	}

	total_channels = 0;

	error = NULL;
	ret = SR_OK;
	file_has_logic = FALSE;
	sections = g_key_file_get_groups(kf, NULL);
	for (i = 0; sections[i] && ret == SR_OK; i++) {
		if (!strcmp(sections[i], "global"))
			/* nothing really interesting in here yet */
			continue;
		if (!strncmp(sections[i], "device ", 7)) {
			/* device section */
			sdi = NULL;
			keys = g_key_file_get_keys(kf, sections[i], NULL, NULL);

			/* File contains analog data if there are analog channels. */
			total_analog = g_key_file_get_integer(kf, sections[i],
					"total analog",	&error);
			if (total_analog > 0 && !error)
				sdi = sr_session_prepare_sdi(filename, session);
			g_clear_error(&error);

			/* File contains logic data if a capturefile is set. */
			val = g_key_file_get_string(kf, sections[i],
				"capturefile", &error);
			if (val && !error) {
				if (!sdi)
					sdi = sr_session_prepare_sdi(filename, session);
				sr_config_set(sdi, NULL, SR_CONF_CAPTUREFILE,
						g_variant_new_string(val));
				g_free(val);
				file_has_logic = TRUE;
			}
			g_clear_error(&error);

			for (j = 0; keys[j]; j++) {
				if (!strcmp(keys[j], "samplerate")) {
					val = g_key_file_get_string(kf, sections[i],
							keys[j], &error);
					if (!sdi || !val || sr_parse_sizestring(val,
								&tmp_u64) != SR_OK) {
						g_free(val);
						ret = SR_ERR_DATA;
						break;
					}
					g_free(val);
					sr_config_set(sdi, NULL, SR_CONF_SAMPLERATE,
							g_variant_new_uint64(tmp_u64));
				} else if (!strcmp(keys[j], "unitsize") && file_has_logic) {
					unitsize = g_key_file_get_integer(kf, sections[i],
							keys[j], &error);
					if (!sdi || unitsize <= 0 || error) {
						ret = SR_ERR_DATA;
						break;
					}
					sr_config_set(sdi, NULL, SR_CONF_CAPTURE_UNITSIZE,
							g_variant_new_uint64(unitsize));
				} else if (!strcmp(keys[j], "total probes")) {
					total_channels = g_key_file_get_integer(kf,
							sections[i], keys[j], &error);
					if (!sdi || total_channels < 0 || error) {
						ret = SR_ERR_DATA;
						break;
					}
					sr_config_set(sdi, NULL, SR_CONF_NUM_LOGIC_CHANNELS,
							g_variant_new_int32(total_channels));
					for (k = 0; k < total_channels; k++) {
						g_snprintf(channelname, sizeof(channelname),
								"%d", k);
						sr_channel_new(sdi, k, SR_CHANNEL_LOGIC,
								FALSE, channelname);
					}
				} else if (!strcmp(keys[j], "total analog")) {
					total_analog = g_key_file_get_integer(kf,
							sections[i], keys[j], &error);
					if (!sdi || total_analog < 0 || error) {
						ret = SR_ERR_DATA;
						break;
					}
					sr_config_set(sdi, NULL, SR_CONF_NUM_ANALOG_CHANNELS,
							g_variant_new_int32(total_analog));
					for (k = total_channels; k < (total_channels + total_analog); k++) {
						g_snprintf(channelname, sizeof(channelname),
								"%d", k);
						sr_channel_new(sdi, k, SR_CHANNEL_ANALOG,
								FALSE, channelname);
					}
				} else if (!strncmp(keys[j], "probe", 5)) {
					tmp_u64 = g_ascii_strtoull(keys[j] + 5, NULL, 10);
					if (!sdi || tmp_u64 == 0 || tmp_u64 > G_MAXINT) {
						ret = SR_ERR_DATA;
						break;
					}
					ch = g_slist_nth_data(sdi->channels, tmp_u64 - 1);
					if (!ch) {
						ret = SR_ERR_DATA;
						break;
					}
					val = g_key_file_get_string(kf, sections[i],
							keys[j], &error);
					if (!val) {
						ret = SR_ERR_DATA;
						break;
					}
					/* sr_session_save() */
					sr_dev_channel_name_set(ch, val);
					g_free(val);
					sr_dev_channel_enable(ch, TRUE);
				} else if (!strncmp(keys[j], "analog", 6)) {
					tmp_u64 = g_ascii_strtoull(keys[j]+6, NULL, 10);
					if (!sdi || tmp_u64 == 0 || tmp_u64 > G_MAXINT) {
						ret = SR_ERR_DATA;
						break;
					}
					ch = NULL;
					for (l = sdi->channels; l; l = l->next) {
						ch = l->data;
						if ((guint64)ch->index == tmp_u64 - 1)
							break;
						else
							ch = NULL;
					}
					if (!ch) {
						ret = SR_ERR_DATA;
						break;
					}
					val = g_key_file_get_string(kf, sections[i],
							keys[j], &error);
					if (!val) {
						ret = SR_ERR_DATA;
						break;
					}
					/* sr_session_save() */
					sr_dev_channel_name_set(ch, val);
					g_free(val);
					sr_dev_channel_enable(ch, TRUE);
				}
			}
			g_strfreev(keys);
		}
	}
	g_strfreev(sections);
	g_key_file_free(kf);

	if (error) {
		sr_err("Failed to parse metadata: %s", error->message);
		g_error_free(error);
	}
	return ret;
}

/** @} */
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <config.h>
	21	#include <string.h>
	22	#include <stdlib.h>
	23	#include <zip.h>
	24	#include <errno.h>
	25	#include <glib.h>
	26	#include <glib/gstdio.h>
	27	#include <libsigrok/libsigrok.h>
	28	#include "libsigrok-internal.h"
	29
	30	/** @cond PRIVATE */
	31	#define LOG_PREFIX "session-file"
	32	/** @endcond */
	33
	34	/**
	35	* @file
	36	*
	37	* Loading and saving libsigrok session files.
	38	*/
	39
	40	/**
	41	* @addtogroup grp_session
	42	*
	43	* @{
	44	*/
	45
	46	extern SR_PRIV struct sr_dev_driver session_driver;
	47	static int session_driver_initialized = 0;
	48
	49	#if !HAVE_ZIP_DISCARD
	50	/* Replacement for zip_discard() if it isn't available. */
	51	/** @private */
	52	SR_PRIV void sr_zip_discard(struct zip *archive)
	53	{
	54	if (zip_unchange_all(archive) < 0 \|\| zip_close(archive) < 0)
	55	sr_err("Failed to discard ZIP archive: %s", zip_strerror(archive));
	56	}
	57	#endif
	58
	59	/**
	60	* Read metadata entries from a session archive.
	61	*
	62	* @param[in] archive An open ZIP archive.
	63	* @param[in] entry Stat buffer filled in for the metadata archive member.
	64	*
	65	* @return A new key/value store containing the session metadata.
	66	*
	67	* @private
	68	*/
	69	SR_PRIV GKeyFile sr_sessionfile_read_metadata(struct zip archive,
	70	const struct zip_stat *entry)
	71	{
	72	GKeyFile *keyfile;
	73	GError *error;
	74	struct zip_file *zf;
	75	char *metabuf;
	76	int metalen;
	77
	78	if (entry->size > G_MAXINT \|\| !(metabuf = g_try_malloc(entry->size))) {
	79	sr_err("Metadata buffer allocation failed.");
	80	return NULL;
	81	}
	82	zf = zip_fopen_index(archive, entry->index, 0);
	83	if (!zf) {
	84	sr_err("Failed to open metadata: %s", zip_strerror(archive));
	85	g_free(metabuf);
	86	return NULL;
	87	}
	88	metalen = zip_fread(zf, metabuf, entry->size);
	89	if (metalen < 0) {
	90	sr_err("Failed to read metadata: %s", zip_file_strerror(zf));
	91	zip_fclose(zf);
	92	g_free(metabuf);
	93	return NULL;
	94	}
	95	zip_fclose(zf);
	96
	97	keyfile = g_key_file_new();
	98	error = NULL;
	99	g_key_file_load_from_data(keyfile, metabuf, metalen,
	100	G_KEY_FILE_NONE, &error);
	101	g_free(metabuf);
	102
	103	if (error) {
	104	sr_err("Failed to parse metadata: %s", error->message);
	105	g_error_free(error);
	106	g_key_file_free(keyfile);
	107	return NULL;
	108	}
	109	return keyfile;
	110	}
	111
	112	/** @private */
	113	SR_PRIV int sr_sessionfile_check(const char *filename)
	114	{
	115	struct zip *archive;
	116	struct zip_file *zf;
	117	struct zip_stat zs;
	118	uint64_t version;
	119	int ret;
	120	char s[11];
	121
	122	if (!filename)
	123	return SR_ERR_ARG;
	124
	125	if (!g_file_test(filename, G_FILE_TEST_IS_REGULAR)) {
	126	sr_err("Not a regular file: %s.", filename);
	127	return SR_ERR;
	128	}
	129
	130	if (!(archive = zip_open(filename, 0, NULL)))
	131	/* No logging: this can be used just to check if it's
	132	* a sigrok session file or not. */
	133	return SR_ERR;
	134
	135	/* check "version" */
	136	if (!(zf = zip_fopen(archive, "version", 0))) {
	137	sr_dbg("Not a sigrok session file: no version found.");
	138	zip_discard(archive);
	139	return SR_ERR;
	140	}
	141	ret = zip_fread(zf, s, sizeof(s) - 1);
	142	if (ret < 0) {
	143	sr_err("Failed to read version file: %s",
	144	zip_file_strerror(zf));
	145	zip_fclose(zf);
	146	zip_discard(archive);
	147	return SR_ERR;
	148	}
	149	zip_fclose(zf);
	150	s[ret] = '\0';
	151	version = g_ascii_strtoull(s, NULL, 10);
	152	if (version == 0 \|\| version > 2) {
	153	sr_dbg("Cannot handle sigrok session file version %" PRIu64 ".",
	154	version);
	155	zip_discard(archive);
	156	return SR_ERR;
	157	}
	158	sr_spew("Detected sigrok session file version %" PRIu64 ".", version);
	159
	160	/* read "metadata" */
	161	if (zip_stat(archive, "metadata", 0, &zs) < 0) {
	162	sr_dbg("Not a valid sigrok session file.");
	163	zip_discard(archive);
	164	return SR_ERR;
	165	}
	166	zip_discard(archive);
	167
	168	return SR_OK;
	169	}
	170
	171	/** @private */
	172	SR_PRIV struct sr_dev_inst sr_session_prepare_sdi(const char filename, struct sr_session **session)
	173	{
	174	struct sr_dev_inst *sdi = NULL;
	175
	176	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	177	sdi->driver = &session_driver;
	178	sdi->status = SR_ST_INACTIVE;
	179	if (!session_driver_initialized) {
	180	/* first device, init the driver */
	181	session_driver_initialized = 1;
	182	sdi->driver->init(sdi->driver, NULL);
	183	}
	184	sr_dev_open(sdi);
	185	sr_session_dev_add(*session, sdi);
	186	(session)->owned_devs = g_slist_append((session)->owned_devs, sdi);
	187	sr_config_set(sdi, NULL, SR_CONF_SESSIONFILE,
	188	g_variant_new_string(filename));
	189
	190	return sdi;
	191	}
	192
	193	/**
	194	* Load the session from the specified filename.
	195	*
	196	* @param ctx The context in which to load the session.
	197	* @param filename The name of the session file to load.
	198	* @param session The session to load the file into.
	199	*
	200	* @retval SR_OK Success
	201	* @retval SR_ERR_MALLOC Memory allocation error
	202	* @retval SR_ERR_DATA Malformed session file
	203	* @retval SR_ERR This is not a session file
	204	*/
	205	SR_API int sr_session_load(struct sr_context ctx, const char filename,
	206	struct sr_session **session)
	207	{
	208	GKeyFile *kf;
	209	GError *error;
	210	struct zip *archive;
	211	struct zip_stat zs;
	212	struct sr_dev_inst *sdi;
	213	struct sr_channel *ch;
	214	int ret, i, j;
	215	uint64_t tmp_u64;
	216	int total_channels, total_analog, k;
	217	GSList *l;
	218	int unitsize;
	219	char sections, keys, *val;
	220	char channelname[SR_MAX_CHANNELNAME_LEN + 1];
	221	gboolean file_has_logic;
	222
	223	if ((ret = sr_sessionfile_check(filename)) != SR_OK)
	224	return ret;
	225
	226	if (!(archive = zip_open(filename, 0, NULL)))
	227	return SR_ERR;
	228
	229	if (zip_stat(archive, "metadata", 0, &zs) < 0) {
	230	zip_discard(archive);
	231	return SR_ERR;
	232	}
	233	kf = sr_sessionfile_read_metadata(archive, &zs);
	234	zip_discard(archive);
	235	if (!kf)
	236	return SR_ERR_DATA;
	237
	238	if ((ret = sr_session_new(ctx, session)) != SR_OK) {
	239	g_key_file_free(kf);
	240	return ret;
	241	}
	242
	243	total_channels = 0;
	244
	245	error = NULL;
	246	ret = SR_OK;
	247	file_has_logic = FALSE;
	248	sections = g_key_file_get_groups(kf, NULL);
	249	for (i = 0; sections[i] && ret == SR_OK; i++) {
	250	if (!strcmp(sections[i], "global"))
	251	/* nothing really interesting in here yet */
	252	continue;
	253	if (!strncmp(sections[i], "device ", 7)) {
	254	/* device section */
	255	sdi = NULL;
	256	keys = g_key_file_get_keys(kf, sections[i], NULL, NULL);
	257
	258	/* File contains analog data if there are analog channels. */
	259	total_analog = g_key_file_get_integer(kf, sections[i],
	260	"total analog", &error);
	261	if (total_analog > 0 && !error)
	262	sdi = sr_session_prepare_sdi(filename, session);
	263	g_clear_error(&error);
	264
	265	/* File contains logic data if a capturefile is set. */
	266	val = g_key_file_get_string(kf, sections[i],
	267	"capturefile", &error);
	268	if (val && !error) {
	269	if (!sdi)
	270	sdi = sr_session_prepare_sdi(filename, session);
	271	sr_config_set(sdi, NULL, SR_CONF_CAPTUREFILE,
	272	g_variant_new_string(val));
	273	g_free(val);
	274	file_has_logic = TRUE;
	275	}
	276	g_clear_error(&error);
	277
	278	for (j = 0; keys[j]; j++) {
	279	if (!strcmp(keys[j], "samplerate")) {
	280	val = g_key_file_get_string(kf, sections[i],
	281	keys[j], &error);
	282	if (!sdi \|\| !val \|\| sr_parse_sizestring(val,
	283	&tmp_u64) != SR_OK) {
	284	g_free(val);
	285	ret = SR_ERR_DATA;
	286	break;
	287	}
	288	g_free(val);
	289	sr_config_set(sdi, NULL, SR_CONF_SAMPLERATE,
	290	g_variant_new_uint64(tmp_u64));
	291	} else if (!strcmp(keys[j], "unitsize") && file_has_logic) {
	292	unitsize = g_key_file_get_integer(kf, sections[i],
	293	keys[j], &error);
	294	if (!sdi \|\| unitsize <= 0 \|\| error) {
	295	ret = SR_ERR_DATA;
	296	break;
	297	}
	298	sr_config_set(sdi, NULL, SR_CONF_CAPTURE_UNITSIZE,
	299	g_variant_new_uint64(unitsize));
	300	} else if (!strcmp(keys[j], "total probes")) {
	301	total_channels = g_key_file_get_integer(kf,
	302	sections[i], keys[j], &error);
	303	if (!sdi \|\| total_channels < 0 \|\| error) {
	304	ret = SR_ERR_DATA;
	305	break;
	306	}
	307	sr_config_set(sdi, NULL, SR_CONF_NUM_LOGIC_CHANNELS,
	308	g_variant_new_int32(total_channels));
	309	for (k = 0; k < total_channels; k++) {
	310	g_snprintf(channelname, sizeof(channelname),
	311	"%d", k);
	312	sr_channel_new(sdi, k, SR_CHANNEL_LOGIC,
	313	FALSE, channelname);
	314	}
	315	} else if (!strcmp(keys[j], "total analog")) {
	316	total_analog = g_key_file_get_integer(kf,
	317	sections[i], keys[j], &error);
	318	if (!sdi \|\| total_analog < 0 \|\| error) {
	319	ret = SR_ERR_DATA;
	320	break;
	321	}
	322	sr_config_set(sdi, NULL, SR_CONF_NUM_ANALOG_CHANNELS,
	323	g_variant_new_int32(total_analog));
	324	for (k = total_channels; k < (total_channels + total_analog); k++) {
	325	g_snprintf(channelname, sizeof(channelname),
	326	"%d", k);
	327	sr_channel_new(sdi, k, SR_CHANNEL_ANALOG,
	328	FALSE, channelname);
	329	}
	330	} else if (!strncmp(keys[j], "probe", 5)) {
	331	tmp_u64 = g_ascii_strtoull(keys[j] + 5, NULL, 10);
	332	if (!sdi \|\| tmp_u64 == 0 \|\| tmp_u64 > G_MAXINT) {
	333	ret = SR_ERR_DATA;
	334	break;
	335	}
	336	ch = g_slist_nth_data(sdi->channels, tmp_u64 - 1);
	337	if (!ch) {
	338	ret = SR_ERR_DATA;
	339	break;
	340	}
	341	val = g_key_file_get_string(kf, sections[i],
	342	keys[j], &error);
	343	if (!val) {
	344	ret = SR_ERR_DATA;
	345	break;
	346	}
	347	/* sr_session_save() */
	348	sr_dev_channel_name_set(ch, val);
	349	g_free(val);
	350	sr_dev_channel_enable(ch, TRUE);
	351	} else if (!strncmp(keys[j], "analog", 6)) {
	352	tmp_u64 = g_ascii_strtoull(keys[j]+6, NULL, 10);
	353	if (!sdi \|\| tmp_u64 == 0 \|\| tmp_u64 > G_MAXINT) {
	354	ret = SR_ERR_DATA;
	355	break;
	356	}
	357	ch = NULL;
	358	for (l = sdi->channels; l; l = l->next) {
	359	ch = l->data;
	360	if ((guint64)ch->index == tmp_u64 - 1)
	361	break;
	362	else
	363	ch = NULL;
	364	}
	365	if (!ch) {
	366	ret = SR_ERR_DATA;
	367	break;
	368	}
	369	val = g_key_file_get_string(kf, sections[i],
	370	keys[j], &error);
	371	if (!val) {
	372	ret = SR_ERR_DATA;
	373	break;
	374	}
	375	/* sr_session_save() */
	376	sr_dev_channel_name_set(ch, val);
	377	g_free(val);
	378	sr_dev_channel_enable(ch, TRUE);
	379	}
	380	}
	381	g_strfreev(keys);
	382	}
	383	}
	384	g_strfreev(sections);
	385	g_key_file_free(kf);
	386
	387	if (error) {
	388	sr_err("Failed to parse metadata: %s", error->message);
	389	g_error_free(error);
	390	}
	391	return ret;
	392	}
	393
	394	/** @} */