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build: Portability fixes.
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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 <string.h>
21 #include <stdlib.h>
22 #include <unistd.h>
23 #include <zip.h>
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #include <errno.h>
27 #include <glib.h>
28 #include <glib/gstdio.h>
29 #include "config.h" /* Needed for PACKAGE_VERSION and others. */
30 #include "libsigrok.h"
31 #include "libsigrok-internal.h"
32
33 /** @cond PRIVATE */
34 #define LOG_PREFIX "session-file"
35 /** @endcond */
36
37 /**
38  * @file
39  *
40  * Loading and saving libsigrok session files.
41  */
42
43 /**
44  * @addtogroup grp_session
45  *
46  * @{
47  */
48
49 extern struct sr_session *session;
50 extern SR_PRIV struct sr_dev_driver session_driver;
51
52 /** @private */
53 SR_PRIV int sr_sessionfile_check(const char *filename)
54 {
55         struct stat st;
56         struct zip *archive;
57         struct zip_file *zf;
58         struct zip_stat zs;
59         int version, ret;
60         char s[11];
61
62         if (!filename)
63                 return SR_ERR_ARG;
64
65         if (stat(filename, &st) == -1) {
66                 sr_err("Couldn't stat %s: %s", filename, strerror(errno));
67                 return SR_ERR;
68         }
69
70         if (!(archive = zip_open(filename, 0, &ret)))
71                 /* No logging: this can be used just to check if it's
72                  * a sigrok session file or not. */
73                 return SR_ERR;
74
75         /* check "version" */
76         version = 0;
77         if (!(zf = zip_fopen(archive, "version", 0))) {
78                 sr_dbg("Not a sigrok session file: no version found.");
79                 return SR_ERR;
80         }
81         if ((ret = zip_fread(zf, s, 10)) == -1)
82                 return SR_ERR;
83         zip_fclose(zf);
84         s[ret] = 0;
85         version = strtoull(s, NULL, 10);
86         if (version > 2) {
87                 sr_dbg("Cannot handle sigrok session file version %d.", version);
88                 return SR_ERR;
89         }
90         sr_spew("Detected sigrok session file version %d.", version);
91
92         /* read "metadata" */
93         if (zip_stat(archive, "metadata", 0, &zs) == -1) {
94                 sr_dbg("Not a valid sigrok session file.");
95                 return SR_ERR;
96         }
97
98         return SR_OK;
99 }
100
101 /**
102  * Load the session from the specified filename.
103  *
104  * @param filename The name of the session file to load. Must not be NULL.
105  *
106  * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments,
107  *         SR_ERR_MALLOC upon memory allocation errors, or SR_ERR upon
108  *         other errors.
109  */
110 SR_API int sr_session_load(const char *filename, struct sr_session **session)
111 {
112         GKeyFile *kf;
113         GPtrArray *capturefiles;
114         struct zip *archive;
115         struct zip_file *zf;
116         struct zip_stat zs;
117         struct sr_dev_inst *sdi;
118         struct sr_channel *ch;
119         int devcnt, ret, i, j;
120         uint64_t tmp_u64, total_channels, enabled_channels, p;
121         char **sections, **keys, *metafile, *val;
122         char channelname[SR_MAX_CHANNELNAME_LEN + 1];
123
124         if ((ret = sr_sessionfile_check(filename)) != SR_OK)
125                 return ret;
126
127         if (!(archive = zip_open(filename, 0, &ret)))
128                 return SR_ERR;
129
130         if (zip_stat(archive, "metadata", 0, &zs) == -1)
131                 return SR_ERR;
132
133         if (!(metafile = g_try_malloc(zs.size))) {
134                 sr_err("%s: metafile malloc failed", __func__);
135                 return SR_ERR_MALLOC;
136         }
137
138         zf = zip_fopen_index(archive, zs.index, 0);
139         zip_fread(zf, metafile, zs.size);
140         zip_fclose(zf);
141
142         kf = g_key_file_new();
143         if (!g_key_file_load_from_data(kf, metafile, zs.size, 0, NULL)) {
144                 sr_dbg("Failed to parse metadata.");
145                 return SR_ERR;
146         }
147
148         if ((ret = sr_session_new(session)) != SR_OK)
149                 return ret;
150
151         devcnt = 0;
152         capturefiles = g_ptr_array_new_with_free_func(g_free);
153         sections = g_key_file_get_groups(kf, NULL);
154         for (i = 0; sections[i]; i++) {
155                 if (!strcmp(sections[i], "global"))
156                         /* nothing really interesting in here yet */
157                         continue;
158                 if (!strncmp(sections[i], "device ", 7)) {
159                         /* device section */
160                         sdi = NULL;
161                         enabled_channels = total_channels = 0;
162                         keys = g_key_file_get_keys(kf, sections[i], NULL, NULL);
163                         for (j = 0; keys[j]; j++) {
164                                 val = g_key_file_get_string(kf, sections[i], keys[j], NULL);
165                                 if (!strcmp(keys[j], "capturefile")) {
166                                         sdi = sr_dev_inst_new(devcnt, SR_ST_ACTIVE, NULL, NULL, NULL);
167                                         sdi->driver = &session_driver;
168                                         if (devcnt == 0)
169                                                 /* first device, init the driver */
170                                                 sdi->driver->init(NULL);
171                                         sr_dev_open(sdi);
172                                         sr_session_dev_add(*session, sdi);
173                                         sdi->driver->config_set(SR_CONF_SESSIONFILE,
174                                                         g_variant_new_string(filename), sdi, NULL);
175                                         sdi->driver->config_set(SR_CONF_CAPTUREFILE,
176                                                         g_variant_new_string(val), sdi, NULL);
177                                         g_ptr_array_add(capturefiles, val);
178                                 } else if (!strcmp(keys[j], "samplerate")) {
179                                         sr_parse_sizestring(val, &tmp_u64);
180                                         sdi->driver->config_set(SR_CONF_SAMPLERATE,
181                                                         g_variant_new_uint64(tmp_u64), sdi, NULL);
182                                 } else if (!strcmp(keys[j], "unitsize")) {
183                                         tmp_u64 = strtoull(val, NULL, 10);
184                                         sdi->driver->config_set(SR_CONF_CAPTURE_UNITSIZE,
185                                                         g_variant_new_uint64(tmp_u64), sdi, NULL);
186                                 } else if (!strcmp(keys[j], "total probes")) {
187                                         total_channels = strtoull(val, NULL, 10);
188                                         sdi->driver->config_set(SR_CONF_NUM_LOGIC_CHANNELS,
189                                                         g_variant_new_uint64(total_channels), sdi, NULL);
190                                         for (p = 0; p < total_channels; p++) {
191                                                 snprintf(channelname, SR_MAX_CHANNELNAME_LEN, "%" PRIu64, p);
192                                                 if (!(ch = sr_channel_new(p, SR_CHANNEL_LOGIC, TRUE,
193                                                                 channelname)))
194                                                         return SR_ERR;
195                                                 sdi->channels = g_slist_append(sdi->channels, ch);
196                                         }
197                                 } else if (!strncmp(keys[j], "probe", 5)) {
198                                         if (!sdi)
199                                                 continue;
200                                         enabled_channels++;
201                                         tmp_u64 = strtoul(keys[j]+5, NULL, 10);
202                                         /* sr_session_save() */
203                                         sr_dev_channel_name_set(sdi, tmp_u64 - 1, val);
204                                 }
205                         }
206                         g_strfreev(keys);
207                         /* Disable channels not specifically listed. */
208                         if (total_channels)
209                                 for (p = enabled_channels; p < total_channels; p++)
210                                         sr_dev_channel_enable(sdi, p, FALSE);
211                 }
212                 devcnt++;
213         }
214         g_strfreev(sections);
215         g_key_file_free(kf);
216
217         return SR_OK;
218 }
219
220 /**
221  * Save a session to the specified file.
222  *
223  * @param filename The name of the filename to save the session as.
224  *                 Must not be NULL.
225  * @param sdi The device instance from which the data was captured.
226  * @param buf The data to be saved.
227  * @param unitsize The number of bytes per sample.
228  * @param units The number of samples.
229  *
230  * @retval SR_OK Success
231  * @retval SR_ERR_ARG Invalid arguments
232  * @retval SR_ERR Other errors
233  *
234  * @since 0.2.0
235  */
236 SR_API int sr_session_save(struct sr_session *session, const char *filename,
237                 const struct sr_dev_inst *sdi, unsigned char *buf, int unitsize,
238                 int units)
239 {
240         struct sr_channel *ch;
241         GSList *l;
242         GVariant *gvar;
243         uint64_t samplerate;
244         int cnt, ret;
245         char **channel_names;
246
247         samplerate = 0;
248         if (sr_dev_has_option(sdi, SR_CONF_SAMPLERATE)) {
249                 if (sr_config_get(sdi->driver, sdi, NULL,
250                                         SR_CONF_SAMPLERATE, &gvar) == SR_OK) {
251                         samplerate = g_variant_get_uint64(gvar);
252                         g_variant_unref(gvar);
253                 }
254         }
255
256         channel_names = g_malloc0(sizeof(char *) * (g_slist_length(sdi->channels) + 1));
257         cnt = 0;
258         for (l = sdi->channels; l; l = l->next) {
259                 ch = l->data;
260                 if (ch->type != SR_CHANNEL_LOGIC)
261                         continue;
262                 if (ch->enabled != TRUE)
263                         continue;
264                 if (!ch->name)
265                         continue;
266                 /* Just borrowing the ptr. */
267                 channel_names[cnt++] = ch->name;
268         }
269
270         if ((ret = sr_session_save_init(session, filename, samplerate,
271                         channel_names)) != SR_OK)
272                 return ret;
273
274         ret = sr_session_append(session, filename, buf, unitsize, units);
275
276         return ret;
277 }
278
279 /**
280  * Initialize a saved session file.
281  *
282  * @param filename The name of the filename to save the session as.
283  *                 Must not be NULL.
284  * @param samplerate The samplerate to store for this session.
285  * @param channels A NULL-terminated array of strings containing the names
286  * of all the channels active in this session.
287  *
288  * @retval SR_OK Success
289  * @retval SR_ERR_ARG Invalid arguments
290  * @retval SR_ERR Other errors
291  *
292  * @since 0.3.0
293  */
294 SR_API int sr_session_save_init(struct sr_session *session,
295                 const char *filename, uint64_t samplerate, char **channels)
296 {
297         FILE *meta;
298         struct zip *zipfile;
299         struct zip_source *versrc, *metasrc;
300         int tmpfile, cnt, ret, i;
301         char version[1], metafile[32], *s;
302
303         (void) session;
304
305         if (!filename) {
306                 sr_err("%s: filename was NULL", __func__);
307                 return SR_ERR_ARG;
308         }
309
310         /* Quietly delete it first, libzip wants replace ops otherwise. */
311         unlink(filename);
312         if (!(zipfile = zip_open(filename, ZIP_CREATE, &ret)))
313                 return SR_ERR;
314
315         /* "version" */
316         version[0] = '2';
317         if (!(versrc = zip_source_buffer(zipfile, version, 1, 0)))
318                 return SR_ERR;
319         if (zip_add(zipfile, "version", versrc) == -1) {
320                 sr_info("error saving version into zipfile: %s",
321                         zip_strerror(zipfile));
322                 return SR_ERR;
323         }
324
325         /* init "metadata" */
326         strcpy(metafile, "sigrok-meta-XXXXXX");
327         if ((tmpfile = g_mkstemp(metafile)) == -1)
328                 return SR_ERR;
329         close(tmpfile);
330         meta = g_fopen(metafile, "wb");
331         fprintf(meta, "[global]\n");
332         fprintf(meta, "sigrok version = %s\n", PACKAGE_VERSION);
333
334         /* metadata */
335         fprintf(meta, "[device 1]\n");
336
337         /* metadata */
338         fprintf(meta, "capturefile = logic-1\n");
339         cnt = 0;
340         for (i = 0; channels[i]; i++)
341                 cnt++;
342         fprintf(meta, "total probes = %d\n", cnt);
343         s = sr_samplerate_string(samplerate);
344         fprintf(meta, "samplerate = %s\n", s);
345         g_free(s);
346
347         for (i = 0; channels[i]; i++)
348                 fprintf(meta, "probe%d = %s\n", i + 1, channels[i]);
349
350         fclose(meta);
351
352         if (!(metasrc = zip_source_file(zipfile, metafile, 0, -1))) {
353                 unlink(metafile);
354                 return SR_ERR;
355         }
356         if (zip_add(zipfile, "metadata", metasrc) == -1) {
357                 unlink(metafile);
358                 return SR_ERR;
359         }
360
361         if ((ret = zip_close(zipfile)) == -1) {
362                 sr_info("error saving zipfile: %s", zip_strerror(zipfile));
363                 unlink(metafile);
364                 return SR_ERR;
365         }
366
367         unlink(metafile);
368
369         return SR_OK;
370 }
371
372 /**
373  * Append data to an existing session file.
374  *
375  * The session file must have been created with sr_session_save_init()
376  * or sr_session_save() beforehand.
377  *
378  * @param filename The name of the filename to append to. Must not be NULL.
379  * @param buf The data to be appended.
380  * @param unitsize The number of bytes per sample.
381  * @param units The number of samples.
382  *
383  * @retval SR_OK Success
384  * @retval SR_ERR_ARG Invalid arguments
385  * @retval SR_ERR Other errors
386  *
387  * @since 0.3.0
388  */
389 SR_API int sr_session_append(struct sr_session *session, const char *filename,
390                 unsigned char *buf, int unitsize, int units)
391 {
392         struct zip *archive;
393         struct zip_source *logicsrc;
394         zip_int64_t num_files;
395         struct zip_file *zf;
396         struct zip_stat zs;
397         struct zip_source *metasrc;
398         GKeyFile *kf;
399         GError *error;
400         gsize len;
401         int chunk_num, next_chunk_num, tmpfile, ret, i;
402         const char *entry_name;
403         char *metafile, tmpname[32], chunkname[16];
404
405         (void) session;
406
407         if ((ret = sr_sessionfile_check(filename)) != SR_OK)
408                 return ret;
409
410         if (!(archive = zip_open(filename, 0, &ret)))
411                 return SR_ERR;
412
413         if (zip_stat(archive, "metadata", 0, &zs) == -1)
414                 return SR_ERR;
415
416         metafile = g_malloc(zs.size);
417         zf = zip_fopen_index(archive, zs.index, 0);
418         zip_fread(zf, metafile, zs.size);
419         zip_fclose(zf);
420
421         /*
422          * If the file was only initialized but doesn't yet have any
423          * data it in, it won't have a unitsize field in metadata yet.
424          */
425         error = NULL;
426         kf = g_key_file_new();
427         if (!g_key_file_load_from_data(kf, metafile, zs.size, 0, &error)) {
428                 sr_err("Failed to parse metadata: %s.", error->message);
429                 return SR_ERR;
430         }
431         g_free(metafile);
432         tmpname[0] = '\0';
433         if (!g_key_file_has_key(kf, "device 1", "unitsize", &error)) {
434                 if (error && error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND) {
435                         sr_err("Failed to check unitsize key: %s", error ? error->message : "?");
436                         return SR_ERR;
437                 }
438                 /* Add unitsize field. */
439                 g_key_file_set_integer(kf, "device 1", "unitsize", unitsize);
440                 metafile = g_key_file_to_data(kf, &len, &error);
441                 strcpy(tmpname, "sigrok-meta-XXXXXX");
442                 if ((tmpfile = g_mkstemp(tmpname)) == -1)
443                         return SR_ERR;
444                 if (write(tmpfile, metafile, len) < 0) {
445                         sr_dbg("Failed to create new metadata: %s", strerror(errno));
446                         g_free(metafile);
447                         unlink(tmpname);
448                         return SR_ERR;
449                 }
450                 close(tmpfile);
451                 if (!(metasrc = zip_source_file(archive, tmpname, 0, -1))) {
452                         sr_err("Failed to create zip source for metadata.");
453                         g_free(metafile);
454                         unlink(tmpname);
455                         return SR_ERR;
456                 }
457                 if (zip_replace(archive, zs.index, metasrc) == -1) {
458                         sr_err("Failed to replace metadata file.");
459                         g_free(metafile);
460                         unlink(tmpname);
461                         return SR_ERR;
462                 }
463                 g_free(metafile);
464         }
465         g_key_file_free(kf);
466
467         next_chunk_num = 1;
468         num_files = zip_get_num_entries(archive, 0);
469         for (i = 0; i < num_files; i++) {
470                 entry_name = zip_get_name(archive, i, 0);
471                 if (strncmp(entry_name, "logic-1", 7))
472                         continue;
473                 if (strlen(entry_name) == 7) {
474                         /* This file has no extra chunks, just a single "logic-1".
475                          * Rename it to "logic-1-1" * and continue with chunk 2. */
476                         if (zip_rename(archive, i, "logic-1-1") == -1) {
477                                 sr_err("Failed to rename 'logic-1' to 'logic-1-1'.");
478                                 unlink(tmpname);
479                                 return SR_ERR;
480                         }
481                         next_chunk_num = 2;
482                         break;
483                 } else if (strlen(entry_name) > 8 && entry_name[7] == '-') {
484                         chunk_num = strtoull(entry_name + 8, NULL, 10);
485                         if (chunk_num >= next_chunk_num)
486                                 next_chunk_num = chunk_num + 1;
487                 }
488         }
489         snprintf(chunkname, 15, "logic-1-%d", next_chunk_num);
490         if (!(logicsrc = zip_source_buffer(archive, buf, units * unitsize, FALSE))) {
491                 unlink(tmpname);
492                 return SR_ERR;
493         }
494         if (zip_add(archive, chunkname, logicsrc) == -1) {
495                 unlink(tmpname);
496                 return SR_ERR;
497         }
498         if ((ret = zip_close(archive)) == -1) {
499                 sr_info("error saving session file: %s", zip_strerror(archive));
500                 unlink(tmpname);
501                 return SR_ERR;
502         }
503         unlink(tmpname);
504
505         return SR_OK;
506 }
507
508 /** @} */