Merge branch 'refs/heads/t/server_cmds'
[paraslash.git] / blob.c
1 /*
2 * Copyright (C) 2007-2014 Andre Noll <maan@tuebingen.mpg.de>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file blob.c Macros and functions for blob handling. */
8
9 #include <regex.h>
10 #include <fnmatch.h>
11 #include <osl.h>
12
13 #include "para.h"
14 #include "error.h"
15 #include "crypt.h"
16 #include "string.h"
17 #include "afh.h"
18 #include "afs.h"
19 #include "ipc.h"
20 #include "portable_io.h"
21 #include "sideband.h"
22 #include "command.h"
23
24 /**
25 * Compare two osl objects pointing to unsigned integers of 32 bit size.
26 *
27 * \param obj1 Pointer to the first integer.
28 * \param obj2 Pointer to the second integer.
29 *
30 * \return The values required for an osl compare function.
31 *
32 * \sa osl_compare_func, osl_hash_compare().
33 */
34 static int uint32_compare(const struct osl_object *obj1, const struct osl_object *obj2)
35 {
36 uint32_t d1 = read_u32((const char *)obj1->data);
37 uint32_t d2 = read_u32((const char *)obj2->data);
38
39 if (d1 < d2)
40 return 1;
41 if (d1 > d2)
42 return -1;
43 return 0;
44 }
45
46 static struct osl_column_description blob_cols[] = {
47 [BLOBCOL_ID] = {
48 .storage_type = OSL_MAPPED_STORAGE,
49 .storage_flags = OSL_RBTREE | OSL_UNIQUE | OSL_FIXED_SIZE,
50 .name = "id",
51 .data_size = 4,
52 .compare_function = uint32_compare
53 },
54 [BLOBCOL_NAME] = {
55 .storage_type = OSL_MAPPED_STORAGE,
56 .storage_flags = OSL_RBTREE | OSL_UNIQUE,
57 .name = "name",
58 .compare_function = string_compare
59 },
60 [BLOBCOL_DEF] = {
61 .storage_type = OSL_DISK_STORAGE,
62 .storage_flags = 0,
63 .name = "definition"
64 }
65 };
66
67 /** Define an osl table description for a blob table. */
68 #define DEFINE_BLOB_TABLE_DESC(table_name) \
69 struct osl_table_description table_name ## _table_desc = { \
70 .name = #table_name, \
71 .num_columns = NUM_BLOB_COLUMNS, \
72 .flags = OSL_LARGE_TABLE, \
73 .column_descriptions = blob_cols \
74 };
75
76 /** Define a pointer to an osl blob table with a canonical name. */
77 #define DEFINE_BLOB_TABLE_PTR(table_name) struct osl_table *table_name ## _table;
78
79
80 /** Define a blob table. */
81 #define INIT_BLOB_TABLE(table_name) \
82 DEFINE_BLOB_TABLE_DESC(table_name); \
83 DEFINE_BLOB_TABLE_PTR(table_name);
84
85 /* doxygen isn't smart enough to recognize these */
86 /** \cond blob_table */
87 INIT_BLOB_TABLE(lyrics);
88 INIT_BLOB_TABLE(images);
89 INIT_BLOB_TABLE(moods);
90 INIT_BLOB_TABLE(playlists);
91 /** \endcond blob_table */
92
93 /** Flags that may be passed to the \p ls functions of each blob type. */
94 enum blob_ls_flags {
95 /** List both id and name. */
96 BLOB_LS_FLAG_LONG = 1,
97 /** Reverse sort order. */
98 BLOB_LS_FLAG_REVERSE = 2,
99 /** Sort by id instead of name. */
100 BLOB_LS_FLAG_SORT_BY_ID = 4,
101 };
102
103 /** Structure passed to the \p print_blob function. */
104 struct lsblob_action_data {
105 /** The flags given at the command line. */
106 uint32_t flags;
107 /** Message buffer. */
108 struct para_buffer pb;
109 };
110
111 static int print_blob(struct osl_table *table, struct osl_row *row,
112 const char *name, void *data)
113 {
114 struct lsblob_action_data *lbad = data;
115 struct osl_object obj;
116 uint32_t id;
117 int ret;
118
119 if (!(lbad->flags & BLOB_LS_FLAG_LONG))
120 return para_printf(&lbad->pb, "%s\n", name);
121 ret = osl(osl_get_object(table, row, BLOBCOL_ID, &obj));
122 if (ret < 0) {
123 para_printf(&lbad->pb, "%s: %s\n", name, para_strerror(-ret));
124 return ret;
125 }
126 id = *(uint32_t *)obj.data;
127 return para_printf(&lbad->pb, "%u\t%s\n", id, name);
128 }
129
130 static void com_lsblob_callback(struct osl_table *table,
131 int fd, const struct osl_object *query)
132 {
133 struct lsblob_action_data lbad = {
134 .flags = *(uint32_t *)query->data,
135 .pb = {
136 .max_size = shm_get_shmmax(),
137 .private_data = &(struct afs_max_size_handler_data) {
138 .fd = fd,
139 .band = SBD_OUTPUT
140 },
141 .max_size_handler = afs_max_size_handler,
142 }
143 };
144 struct pattern_match_data pmd = {
145 .table = table,
146 .patterns = {.data = (char *)query->data + sizeof(uint32_t),
147 .size = query->size - sizeof(uint32_t)},
148 .pm_flags = PM_NO_PATTERN_MATCHES_EVERYTHING | PM_SKIP_EMPTY_NAME,
149 .match_col_num = BLOBCOL_NAME,
150 .data = &lbad,
151 .action = print_blob,
152 };
153 int ret;
154
155 if (lbad.flags & BLOB_LS_FLAG_REVERSE)
156 pmd.pm_flags |= PM_REVERSE_LOOP;
157 if (!(lbad.flags & BLOB_LS_FLAG_SORT_BY_ID))
158 pmd.loop_col_num = BLOBCOL_NAME;
159 else
160 pmd.loop_col_num = BLOBCOL_ID;
161 ret = for_each_matching_row(&pmd);
162 if (ret < 0)
163 para_printf(&lbad.pb, "%s\n", para_strerror(-ret));
164 else if (pmd.num_matches == 0 && pmd.patterns.size > 0)
165 para_printf(&lbad.pb, "no matches\n");
166 if (lbad.pb.offset)
167 pass_buffer_as_shm(fd, SBD_OUTPUT, lbad.pb.buf, lbad.pb.offset);
168 free(lbad.pb.buf);
169 }
170
171 static int com_lsblob(callback_function *f, struct command_context *cc)
172 {
173 uint32_t flags = 0;
174 struct osl_object options = {.data = &flags, .size = sizeof(flags)};
175 int i;
176
177 for (i = 1; i < cc->argc; i++) {
178 const char *arg = cc->argv[i];
179 if (arg[0] != '-')
180 break;
181 if (!strcmp(arg, "--")) {
182 i++;
183 break;
184 }
185 if (!strcmp(arg, "-l")) {
186 flags |= BLOB_LS_FLAG_LONG;
187 continue;
188 }
189 if (!strcmp(arg, "-i")) {
190 flags |= BLOB_LS_FLAG_SORT_BY_ID;
191 continue;
192 }
193 if (!strcmp(arg, "-r")) {
194 flags |= BLOB_LS_FLAG_REVERSE;
195 continue;
196 }
197 break;
198 }
199 // if (argc > i)
200 // return -E_BLOB_SYNTAX;
201 return send_option_arg_callback_request(&options, cc->argc - i,
202 cc->argv + i, f, afs_cb_result_handler, cc);
203 }
204
205 static int cat_blob(struct osl_table *table, struct osl_row *row,
206 __a_unused const char *name, void *data)
207 {
208 int ret = 0, ret2, fd = *(int *)data;
209 struct osl_object obj;
210
211 ret = osl(osl_open_disk_object(table, row, BLOBCOL_DEF, &obj));
212 if (ret < 0)
213 return (ret == osl(-E_OSL_EMPTY))? 0 : ret;
214 assert(obj.size > 0);
215 ret = pass_buffer_as_shm(fd, SBD_OUTPUT, obj.data, obj.size);
216 ret2 = osl(osl_close_disk_object(&obj));
217 return (ret < 0)? ret : ret2;
218 }
219
220 static void com_catblob_callback(struct osl_table *table, int fd,
221 const struct osl_object *query)
222 {
223 struct pattern_match_data pmd = {
224 .table = table,
225 .patterns = *query,
226 .loop_col_num = BLOBCOL_NAME,
227 .match_col_num = BLOBCOL_NAME,
228 .pm_flags = PM_SKIP_EMPTY_NAME,
229 .data = &fd,
230 .action = cat_blob
231 };
232 for_each_matching_row(&pmd);
233 if (pmd.num_matches == 0) {
234 char err_msg[] = "no matches\n";
235 pass_buffer_as_shm(fd, SBD_OUTPUT, err_msg, sizeof(err_msg));
236 }
237 }
238
239 static int com_catblob(callback_function *f, struct command_context *cc)
240 {
241 if (cc->argc < 2)
242 return -E_BLOB_SYNTAX;
243 return send_standard_callback_request(cc->argc - 1, cc->argv + 1, f,
244 afs_cb_result_handler, cc);
245 }
246
247 /** Used for removing rows from a blob table. */
248 struct rmblob_data {
249 /** Message buffer. */
250 struct para_buffer pb;
251 };
252
253 static int remove_blob(struct osl_table *table, struct osl_row *row,
254 const char *name, void *data)
255 {
256 struct rmblob_data *rmbd = data;
257 int ret = osl(osl_del_row(table, row));
258 if (ret < 0) {
259 para_printf(&rmbd->pb, "%s: %s\n", name, para_strerror(-ret));
260 return ret;
261 }
262 return 1;
263 }
264
265 static void com_rmblob_callback(struct osl_table *table, int fd,
266 const struct osl_object *query)
267 {
268 int ret, ret2 = 0;
269 struct rmblob_data rmbd = {
270 .pb = {
271 .max_size = shm_get_shmmax(),
272 .private_data = &(struct afs_max_size_handler_data) {
273 .fd = fd,
274 .band = SBD_OUTPUT
275 },
276 .max_size_handler = afs_max_size_handler,
277 }
278 };
279 struct pattern_match_data pmd = {
280 .table = table,
281 .patterns = *query,
282 .loop_col_num = BLOBCOL_NAME,
283 .match_col_num = BLOBCOL_NAME,
284 .pm_flags = PM_SKIP_EMPTY_NAME,
285 .data = &rmbd,
286 .action = remove_blob
287 };
288 ret = for_each_matching_row(&pmd);
289 if (ret < 0) {
290 ret2 = para_printf(&rmbd.pb, "%s\n", para_strerror(-ret));
291 if (ret2 < 0)
292 goto out;
293 }
294 if (pmd.num_matches == 0)
295 ret2 = para_printf(&rmbd.pb, "no matches, nothing removed\n");
296 else {
297 ret2 = para_printf(&rmbd.pb, "removed %d blobs\n", pmd.num_matches);
298 afs_event(BLOB_RENAME, NULL, table);
299 }
300 out:
301 if (ret2 >= 0 && rmbd.pb.offset)
302 pass_buffer_as_shm(fd, SBD_OUTPUT, rmbd.pb.buf, rmbd.pb.offset);
303 free(rmbd.pb.buf);
304 }
305
306 static int com_rmblob(callback_function *f, struct command_context *cc)
307 {
308 if (cc->argc < 2)
309 return -E_MOOD_SYNTAX;
310 return send_option_arg_callback_request(NULL, cc->argc - 1, cc->argv + 1, f,
311 afs_cb_result_handler, cc);
312 }
313
314 static void com_addblob_callback(struct osl_table *table, int fd,
315 const struct osl_object *query)
316 {
317 struct osl_object objs[NUM_BLOB_COLUMNS];
318 char *name = query->data, *msg;
319 size_t name_len = strlen(name) + 1, msg_len;
320 uint32_t id;
321 unsigned num_rows;
322 int ret;
323
324 ret = osl(osl_get_num_rows(table, &num_rows));
325 if (ret < 0)
326 goto out;
327 if (!num_rows) { /* this is the first entry ever added */
328 /* insert dummy row containing the id */
329 id = 2; /* this entry will be entry #1, so 2 is the next */
330 objs[BLOBCOL_ID].data = &id;
331 objs[BLOBCOL_ID].size = sizeof(id);
332 objs[BLOBCOL_NAME].data = "";
333 objs[BLOBCOL_NAME].size = 1;
334 objs[BLOBCOL_DEF].data = "";
335 objs[BLOBCOL_DEF].size = 1;
336 ret = osl(osl_add_row(table, objs));
337 if (ret < 0)
338 goto out;
339 } else {
340 /* check if name already exists */
341 struct osl_row *row;
342 struct osl_object obj = {.data = name, .size = name_len};
343 ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row));
344 if (ret < 0 && ret != -OSL_ERRNO_TO_PARA_ERROR(E_OSL_RB_KEY_NOT_FOUND))
345 goto out;
346 if (ret >= 0) { /* we already have a blob with this name */
347 ret = osl(osl_get_object(table, row, BLOBCOL_ID, &obj));
348 if (ret < 0)
349 goto out;
350 id = *(uint32_t *)obj.data;
351 obj.data = name + name_len;
352 obj.size = query->size - name_len;
353 ret = osl(osl_update_object(table, row, BLOBCOL_DEF, &obj));
354 goto out;
355 }
356 /* new blob, get id of the dummy row and increment it */
357 obj.data = "";
358 obj.size = 1;
359 ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row));
360 if (ret < 0)
361 goto out;
362 ret = osl(osl_get_object(table, row, BLOBCOL_ID, &obj));
363 if (ret < 0)
364 goto out;
365 id = *(uint32_t *)obj.data + 1;
366 obj.data = &id;
367 ret = osl(osl_update_object(table, row, BLOBCOL_ID, &obj));
368 if (ret < 0)
369 goto out;
370 }
371 id--;
372 objs[BLOBCOL_ID].data = &id;
373 objs[BLOBCOL_ID].size = sizeof(id);
374 objs[BLOBCOL_NAME].data = name;
375 objs[BLOBCOL_NAME].size = name_len;
376 objs[BLOBCOL_DEF].data = name + name_len;
377 objs[BLOBCOL_DEF].size = query->size - name_len;
378 ret = osl(osl_add_row(table, objs));
379 if (ret < 0)
380 goto out;
381 afs_event(BLOB_ADD, NULL, table);
382 out:
383 if (ret < 0)
384 msg_len = xasprintf(&msg, "could not add %s: %s\n", name,
385 para_strerror(-ret));
386 else
387 msg_len = xasprintf(&msg, "added %s as id %u\n", name, id);
388 pass_buffer_as_shm(fd, SBD_OUTPUT, msg, msg_len);
389 free(msg);
390 }
391
392 /* Write input from fd to dynamically allocated buffer, but maximal 10M. */
393 static int fd2buf(struct stream_cipher_context *scc, struct osl_object *obj)
394 {
395 size_t max_size = 10 * 1024 * 1024;
396 int ret;
397 struct iovec iov;
398
399 obj->data = NULL;
400 obj->size = 0;
401 again:
402 do {
403 ret = recv_sb(scc, SBD_BLOB_DATA, max_size, &iov);
404 } while (ret == 0);
405
406 if (ret < 0) {
407 free(obj->data);
408 obj->data = NULL;
409 obj->size = 0;
410 return ret;
411 }
412 if (iov.iov_len == 0) /* end of blob */
413 return 1;
414 if (!obj->data) {
415 obj->data = iov.iov_base;
416 obj->size = iov.iov_len;
417 } else {
418 obj->data = para_realloc(obj->data, obj->size + iov.iov_len);
419 memcpy(obj->data + obj->size, iov.iov_base, iov.iov_len);
420 obj->size += iov.iov_len;
421 free(iov.iov_base);
422 max_size -= iov.iov_len;
423 }
424 goto again;
425 return 1;
426 }
427
428 /*
429 * Read data from a file descriptor, and send it to the afs process.
430 *
431 * \param cc Contains the file descriptor to read data from.
432 * \param arg_obj Pointer to the arguments to \a f.
433 * \param f The callback function.
434 * \param result_handler See \ref send_callback_request.
435 * \param private_result_data See \ref send_callback_request.
436 *
437 * This function is used by the addblob commands that instruct para_server to
438 * store arbitrary data in a blob table. Input data is read and decrypted from
439 * the file descriptor given by \a cc. This data is concatenated with the
440 * buffer given by \a arg_obj, and the combined buffer is made available to the
441 * afs process via the callback method. See \ref send_callback_request for
442 * details.
443 *
444 * \return Negative on errors, the return value of the underlying call to
445 * send_callback_request() otherwise.
446 */
447 static int stdin_command(struct command_context *cc, struct osl_object *arg_obj,
448 callback_function *f, callback_result_handler *result_handler,
449 void *private_result_data)
450 {
451 struct osl_object query, stdin_obj;
452 int ret;
453
454 ret = send_sb(&cc->scc, NULL, 0, SBD_AWAITING_DATA, false);
455 if (ret < 0)
456 return ret;
457 ret = fd2buf(&cc->scc, &stdin_obj);
458 if (ret < 0)
459 return ret;
460 query.size = arg_obj->size + stdin_obj.size;
461 query.data = para_malloc(query.size);
462 memcpy(query.data, arg_obj->data, arg_obj->size);
463 if (stdin_obj.size > 0)
464 memcpy((char *)query.data + arg_obj->size, stdin_obj.data,
465 stdin_obj.size);
466 free(stdin_obj.data);
467 ret = send_callback_request(f, &query, result_handler, private_result_data);
468 free(query.data);
469 return ret;
470 }
471
472 static int com_addblob(callback_function *f, struct command_context *cc)
473 {
474 struct osl_object arg_obj;
475
476 if (cc->argc != 2)
477 return -E_BLOB_SYNTAX;
478 if (!*cc->argv[1]) /* empty name is reserved for the dummy row */
479 return -E_BLOB_SYNTAX;
480 arg_obj.size = strlen(cc->argv[1]) + 1;
481 arg_obj.data = (char *)cc->argv[1];
482 return stdin_command(cc, &arg_obj, f, afs_cb_result_handler, cc);
483 }
484
485 static void com_mvblob_callback(struct osl_table *table, int fd,
486 const struct osl_object *query)
487 {
488 char *src = (char *) query->data;
489 struct osl_object obj = {.data = src, .size = strlen(src) + 1};
490 char *dest = src + obj.size;
491 struct osl_row *row;
492 struct para_buffer pb = {
493 .max_size = shm_get_shmmax(),
494 .private_data = &fd,
495 .max_size_handler = afs_max_size_handler
496 };
497 int ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row));
498
499 if (ret < 0) {
500 para_printf(&pb, "could not locate %s: %s\n", src,
501 para_strerror(-ret));
502 goto out;
503 }
504 obj.data = dest;
505 obj.size = strlen(dest) + 1;
506 ret = osl(osl_update_object(table, row, BLOBCOL_NAME, &obj));
507 if (ret < 0) {
508 para_printf(&pb, "failed to update object %s: %s\n", dest,
509 para_strerror(-ret));
510 goto out;
511 }
512 afs_event(BLOB_RENAME, NULL, table);
513 out:
514 if (pb.offset)
515 pass_buffer_as_shm(fd, SBD_OUTPUT, pb.buf, pb.offset);
516 free(pb.buf);
517 }
518
519 static int com_mvblob(callback_function *f, struct command_context *cc)
520 {
521 int ret;
522
523 if (cc->argc != 3)
524 return -E_MOOD_SYNTAX;
525 ret = send_option_arg_callback_request(NULL, cc->argc - 1,
526 cc->argv + 1, f, afs_cb_result_handler, cc);
527 if (ret < 0)
528 send_strerror(cc, -ret);
529 return ret;
530 }
531
532 #define DEFINE_BLOB_COMMAND(cmd_name, table_name, cmd_prefix) \
533 static void com_ ## cmd_name ## cmd_prefix ## _callback(int fd, const struct osl_object *query) \
534 { \
535 return com_ ## cmd_name ## blob_callback(table_name ## _table, fd, query); \
536 } \
537 int com_ ## cmd_name ## cmd_prefix(struct command_context *cc) \
538 { \
539 return com_ ## cmd_name ## blob(com_ ## cmd_name ## cmd_prefix ## _callback, cc); \
540 }
541
542 static int blob_get_name_by_id(struct osl_table *table, uint32_t id,
543 char **name)
544 {
545 struct osl_row *row;
546 struct osl_object obj = {.data = &id, .size = sizeof(id)};
547 int ret;
548
549 *name = NULL;
550 if (!id)
551 return 1;
552 ret = osl(osl_get_row(table, BLOBCOL_ID, &obj, &row));
553 if (ret < 0)
554 return ret;
555 ret = osl(osl_get_object(table, row, BLOBCOL_NAME, &obj));
556 if (ret < 0)
557 return ret;
558 *name = (char *)obj.data;
559 return 1;
560 }
561
562 /** Define the \p get_name_by_id function for this blob type. */
563 #define DEFINE_GET_NAME_BY_ID(table_name, cmd_prefix) \
564 int cmd_prefix ## _get_name_by_id(uint32_t id, char **name) \
565 { \
566 return blob_get_name_by_id(table_name ## _table, id, name); \
567 }
568
569
570 static int blob_get_def_by_name(struct osl_table *table, char *name,
571 struct osl_object *def)
572 {
573 struct osl_row *row;
574 struct osl_object obj = {.data = name, .size = strlen(name) + 1};
575 int ret;
576
577 def->data = NULL;
578 if (!*name)
579 return 1;
580 ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row));
581 if (ret < 0)
582 return ret;
583 return osl(osl_open_disk_object(table, row, BLOBCOL_DEF, def));
584 }
585
586 /** Define the \p get_def_by_id function for this blob type. */
587 #define DEFINE_GET_DEF_BY_NAME(table_name, cmd_prefix) \
588 int cmd_prefix ## _get_def_by_name(char *name, struct osl_object *def) \
589 { \
590 return blob_get_def_by_name(table_name ## _table, name, def); \
591 }
592
593 static int blob_get_def_by_id(struct osl_table *table, uint32_t id,
594 struct osl_object *def)
595 {
596 struct osl_row *row;
597 struct osl_object obj = {.data = &id, .size = sizeof(id)};
598 int ret;
599
600 def->data = NULL;
601 if (!id)
602 return 1;
603 ret = osl(osl_get_row(table, BLOBCOL_ID, &obj, &row));
604 if (ret < 0)
605 return ret;
606 return osl(osl_open_disk_object(table, row, BLOBCOL_DEF, def));
607 }
608
609 /** Define the \p get_def_by_id function for this blob type. */
610 #define DEFINE_GET_DEF_BY_ID(table_name, cmd_prefix) \
611 int cmd_prefix ## _get_def_by_id(uint32_t id, struct osl_object *def) \
612 { \
613 return blob_get_def_by_id(table_name ## _table, id, def); \
614 }
615
616 static int blob_get_name_and_def_by_row(struct osl_table *table,
617 const struct osl_row *row, char **name, struct osl_object *def)
618 {
619 struct osl_object obj;
620 int ret = osl(osl_get_object(table, row, BLOBCOL_NAME, &obj));
621 if (ret < 0)
622 return ret;
623 *name = obj.data;
624 return osl(osl_open_disk_object(table, row, BLOBCOL_DEF, def));
625 }
626 /** Define the \p get_name_and_def_by_row function for this blob type. */
627 #define DEFINE_GET_NAME_AND_DEF_BY_ROW(table_name, cmd_prefix) \
628 int cmd_prefix ## _get_name_and_def_by_row(const struct osl_row *row, \
629 char **name, struct osl_object *def) \
630 { \
631 return blob_get_name_and_def_by_row(table_name ## _table, \
632 row, name, def); \
633 }
634
635 /** Define the \p close function for this blob type. */
636 #define DEFINE_BLOB_CLOSE(table_name) \
637 static void table_name ## _close(void) \
638 { \
639 osl_close_table(table_name ## _table, OSL_MARK_CLEAN); \
640 table_name ## _table = NULL; \
641 }
642
643 /** Define the \p create function for this blob type. */
644 #define DEFINE_BLOB_CREATE(table_name) \
645 static int table_name ## _create(const char *dir) \
646 { \
647 table_name ## _table_desc.dir = dir; \
648 return osl_create_table(&table_name ## _table_desc); \
649 }
650
651 static int blob_open(struct osl_table **table,
652 struct osl_table_description *desc,
653 const char *dir)
654 {
655 int ret;
656 desc->dir = dir;
657 ret = osl(osl_open_table(desc, table));
658 if (ret >= 0)
659 return ret;
660 *table = NULL;
661 if (ret >= 0 || ret == -OSL_ERRNO_TO_PARA_ERROR(E_OSL_NOENT))
662 return 1;
663 return ret;
664 }
665
666 #define DEFINE_BLOB_OPEN(table_name) \
667 static int table_name ## _open(const char *dir) \
668 { \
669 return blob_open(&table_name ## _table, \
670 &table_name ## _table_desc, dir); \
671 }
672
673
674 /** Define the \p init function for this blob type. */
675 #define DEFINE_BLOB_INIT(table_name) \
676 void table_name ## _init(struct afs_table *t) \
677 { \
678 t->open = table_name ## _open; \
679 t->close = table_name ## _close; \
680 t->create = table_name ## _create;\
681 t->event_handler = table_name ##_event_handler; \
682 table_name ## _table = NULL; \
683 }
684
685
686 /** Define all functions for this blob type. */
687 #define DEFINE_BLOB_FUNCTIONS(table_name, cmd_prefix) \
688 DEFINE_BLOB_OPEN(table_name) \
689 DEFINE_BLOB_CLOSE(table_name) \
690 DEFINE_BLOB_CREATE(table_name) \
691 DEFINE_BLOB_INIT(table_name) \
692 DEFINE_BLOB_COMMAND(ls, table_name, cmd_prefix) \
693 DEFINE_BLOB_COMMAND(cat, table_name, cmd_prefix) \
694 DEFINE_BLOB_COMMAND(add, table_name, cmd_prefix) \
695 DEFINE_BLOB_COMMAND(rm, table_name, cmd_prefix) \
696 DEFINE_BLOB_COMMAND(mv, table_name, cmd_prefix) \
697 DEFINE_GET_NAME_BY_ID(table_name, cmd_prefix); \
698 DEFINE_GET_DEF_BY_ID(table_name, cmd_prefix); \
699 DEFINE_GET_DEF_BY_NAME(table_name, cmd_prefix); \
700 DEFINE_GET_NAME_AND_DEF_BY_ROW(table_name, cmd_prefix); \
701
702 /* doxygen isn't smart enough to recognize these */
703 /** \cond blob_function */
704 DEFINE_BLOB_FUNCTIONS(lyrics, lyr);
705 DEFINE_BLOB_FUNCTIONS(images, img);
706 DEFINE_BLOB_FUNCTIONS(moods, mood);
707 DEFINE_BLOB_FUNCTIONS(playlists, pl);
708 /** \endcond blob_function */