f40e02244313054ca08f2066e8bb12b488de2579
[paraslash.git] / afs.c
1 /*
2 * Copyright (C) 2007 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file afs.c Paraslash's audio file selector. */
8
9 #include <fnmatch.h>
10 #include "server.cmdline.h"
11 #include "para.h"
12 #include "afh.h"
13 #include "server.h"
14 #include "error.h"
15 #include <dirent.h> /* readdir() */
16 #include <sys/mman.h>
17 #include <sys/time.h>
18 #include "net.h"
19 #include "afs.h"
20 #include "ipc.h"
21 #include "string.h"
22 #include "list.h"
23 #include "sched.h"
24 #include "signal.h"
25 #include "fd.h"
26
27 /** The osl tables used by afs. \sa blob.c. */
28 enum afs_table_num {
29 /** Contains audio file information. See aft.c. */
30 TBLNUM_AUDIO_FILES,
31 /** The table for the paraslash attributes. See attribute.c. */
32 TBLNUM_ATTRIBUTES,
33 /**
34 * Paraslash's scoring system is based on Gaussian normal
35 * distributions, and the relevant data is stored in the rbtrees of an
36 * osl table containing only volatile columns. See score.c for
37 * details.
38 */
39 TBLNUM_SCORES,
40 /**
41 * A standard blob table containing the mood definitions. For details
42 * see mood.c.
43 */
44 TBLNUM_MOODS,
45 /** A blob table containing lyrics on a per-song basis. */
46 TBLNUM_LYRICS,
47 /** Another blob table for images (for example album cover art). */
48 TBLNUM_IMAGES,
49 /** Yet another blob table for storing standard playlists. */
50 TBLNUM_PLAYLIST,
51 /** How many tables are in use? */
52 NUM_AFS_TABLES
53 };
54
55 static struct table_info afs_tables[NUM_AFS_TABLES];
56
57 struct command_task {
58 /** The file descriptor for the local socket. */
59 int fd;
60 /**
61 * Value sent by the command handlers to identify themselves as
62 * children of the running para_server.
63 */
64 uint32_t cookie;
65 /** The associated task structure. */
66 struct task task;
67 };
68
69 /**
70 * A random number used to "authenticate" the connection.
71 *
72 * para_server picks this number by random before forking the afs process. The
73 * command handlers write this number together with the id of the shared memory
74 * area containing the query. This way, a malicious local user has to know this
75 * number to be able to cause the afs process to crash by sending fake queries.
76 */
77 extern uint32_t afs_socket_cookie;
78
79 /**
80 * Struct to let command handlers execute a callback in afs context.
81 *
82 * Commands that need to change the state of afs can't change the relevant data
83 * structures directly because commands are executed in a child process, i.e.
84 * they get their own virtual address space.
85 *
86 * This structure is used by \p send_callback_request() (executed from handler
87 * context) in order to let the afs process call the specified function. An
88 * instance of that structure is written to a shared memory area together with
89 * the arguments to the callback function. The identifier of the shared memory
90 * area is written to the command socket.
91 *
92 * The afs process accepts connections on the command socket and reads the
93 * shared memory id, attaches the corresponing area, calls the given handler to
94 * perform the desired action and to optionally compute a result.
95 *
96 * The result and a \p callback_result structure is then written to another
97 * shared memory area. The identifier for that area is written to the handler's
98 * command socket, so that the handler process can read the id, attach the
99 * shared memory area and use the result.
100 *
101 * \sa struct callback_result.
102 */
103 struct callback_query {
104 /** The function to be called. */
105 callback_function *handler;
106 /** The number of bytes of the query */
107 size_t query_size;
108 };
109
110 /**
111 * Structure embedded in the result of a callback.
112 *
113 * If the callback produced a result, an instance of that structure is embeeded
114 * into the shared memory area holding the result, mainly to let the command
115 * handler know the size of the result.
116 *
117 * \sa struct callback_query.
118 */
119 struct callback_result {
120 /** The number of bytes of the result. */
121 size_t result_size;
122 };
123
124 /**
125 * Ask the parent process to call a given function.
126 *
127 * \param f The function to be called.
128 * \param query Pointer to arbitrary data for the callback.
129 * \param result Callback result will be stored here.
130 *
131 * This function creates a shared memory area, copies the buffer pointed to by
132 * \a buf to that area and notifies the afs process that \a f should be
133 * called ASAP.
134 *
135 * \return Negative, on errors, the return value of the callback function
136 * otherwise.
137 *
138 * \sa send_option_arg_callback_request(), send_standard_callback_request().
139 */
140 int send_callback_request(callback_function *f, struct osl_object *query,
141 struct osl_object *result)
142 {
143 struct callback_query *cq;
144 struct callback_result *cr;
145 int ret, fd = -1, query_shmid, result_shmid;
146 void *query_shm, *result_shm;
147 char buf[sizeof(afs_socket_cookie) + sizeof(int)];
148 struct sockaddr_un unix_addr;
149 size_t query_shm_size = sizeof(*cq);
150
151 if (query)
152 query_shm_size += query->size;
153 ret = shm_new(query_shm_size);
154 if (ret < 0)
155 return ret;
156 query_shmid = ret;
157 ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
158 if (ret < 0)
159 goto out;
160 cq = query_shm;
161 cq->handler = f;
162 cq->query_size = query_shm_size - sizeof(*cq);
163
164 if (query)
165 memcpy(query_shm + sizeof(*cq), query->data, query->size);
166 ret = shm_detach(query_shm);
167 if (ret < 0)
168 goto out;
169
170 *(uint32_t *) buf = afs_socket_cookie;
171 *(int *) (buf + sizeof(afs_socket_cookie)) = query_shmid;
172
173 ret = get_stream_socket(PF_UNIX);
174 if (ret < 0)
175 goto out;
176 fd = ret;
177 ret = init_unix_addr(&unix_addr, conf.afs_socket_arg);
178 if (ret < 0)
179 goto out;
180 ret = PARA_CONNECT(fd, &unix_addr);
181 if (ret < 0)
182 goto out;
183 ret = send_bin_buffer(fd, buf, sizeof(buf));
184 if (ret < 0)
185 goto out;
186 ret = recv_bin_buffer(fd, buf, sizeof(buf));
187 if (ret < 0)
188 goto out;
189 if (ret != sizeof(int)) {
190 ret = -E_RECV;
191 goto out;
192 }
193 ret = *(int *) buf;
194 if (ret <= 0)
195 goto out;
196 result_shmid = ret;
197 ret = shm_attach(result_shmid, ATTACH_RO, &result_shm);
198 if (ret >= 0) {
199 assert(result);
200 cr = result_shm;
201 result->size = cr->result_size;
202 result->data = para_malloc(result->size);
203 memcpy(result->data, result_shm + sizeof(*cr), result->size);
204 ret = shm_detach(result_shm);
205 if (ret < 0)
206 PARA_ERROR_LOG("can not detach result\n");
207 } else
208 PARA_ERROR_LOG("attach result failed: %d\n", ret);
209 if (shm_destroy(result_shmid) < 0)
210 PARA_ERROR_LOG("destroy result failed\n");
211 ret = 1;
212 out:
213 if (shm_destroy(query_shmid) < 0)
214 PARA_ERROR_LOG("%s\n", "shm destroy error");
215 if (fd >= 0)
216 close(fd);
217 // PARA_DEBUG_LOG("callback_ret: %d\n", ret);
218 return ret;
219 }
220
221 /**
222 * Send a callback request passing an options structure and an argument vector.
223 *
224 * \param options pointer to an arbitrary data structure.
225 * \param argc Argument count.
226 * \param argv Standard argument vector.
227 * \param f The callback function.
228 * \param result The result of the query is stored here.
229 *
230 * Some commands have a couple of options that are parsed in child context for
231 * syntactic correctness and are stored in a special options structure for that
232 * command. This function allows to pass such a structure together with a list
233 * of further arguments (often a list of audio files) to the parent process.
234 *
235 * \sa send_standard_callback_request(), send_callback_request().
236 */
237 int send_option_arg_callback_request(struct osl_object *options,
238 int argc, char * const * const argv, callback_function *f,
239 struct osl_object *result)
240 {
241 char *p;
242 int i, ret;
243 struct osl_object query = {.size = options? options->size : 0};
244
245 for (i = 0; i < argc; i++)
246 query.size += strlen(argv[i]) + 1;
247 query.data = para_malloc(query.size);
248 p = query.data;
249 if (options) {
250 memcpy(query.data, options->data, options->size);
251 p += options->size;
252 }
253 for (i = 0; i < argc; i++) {
254 strcpy(p, argv[i]); /* OK */
255 p += strlen(argv[i]) + 1;
256 }
257 ret = send_callback_request(f, &query, result);
258 free(query.data);
259 return ret;
260 }
261
262 /**
263 * Send a callback request with an argument vector only.
264 *
265 * \param argc The same meaning as in send_option_arg_callback_request().
266 * \param argv The same meaning as in send_option_arg_callback_request().
267 * \param f The same meaning as in send_option_arg_callback_request().
268 * \param result The same meaning as in send_option_arg_callback_request().
269 *
270 * This is similar to send_option_arg_callback_request(), but no options buffer
271 * is passed to the parent process.
272 *
273 * \return The return value of the underlying call to
274 * send_option_arg_callback_request().
275 */
276 int send_standard_callback_request(int argc, char * const * const argv,
277 callback_function *f, struct osl_object *result)
278 {
279 return send_option_arg_callback_request(NULL, argc, argv, f, result);
280 }
281
282 static int action_if_pattern_matches(struct osl_row *row, void *data)
283 {
284 struct pattern_match_data *pmd = data;
285 struct osl_object name_obj;
286 const char *p, *name;
287 int ret = osl_get_object(pmd->table, row, pmd->match_col_num, &name_obj);
288 const char *pattern_txt = (const char *)pmd->patterns.data;
289
290 if (ret < 0)
291 return ret;
292 name = (char *)name_obj.data;
293 if ((!name || !*name) && (pmd->pm_flags & PM_SKIP_EMPTY_NAME))
294 return 1;
295 if (!pmd->patterns.size && (pmd->pm_flags & PM_NO_PATTERN_MATCHES_EVERYTHING))
296 return pmd->action(pmd->table, row, name, pmd->data);
297 for (p = pattern_txt; p < pattern_txt + pmd->patterns.size;
298 p += strlen(p) + 1) {
299 ret = fnmatch(p, name, pmd->fnmatch_flags);
300 if (ret == FNM_NOMATCH)
301 continue;
302 if (ret)
303 return -E_FNMATCH;
304 return pmd->action(pmd->table, row, name, pmd->data);
305 }
306 return 1;
307 }
308
309 int for_each_matching_row(struct pattern_match_data *pmd)
310 {
311 if (pmd->pm_flags & PM_REVERSE_LOOP)
312 return osl_rbtree_loop_reverse(pmd->table, pmd->loop_col_num, pmd,
313 action_if_pattern_matches);
314 return osl_rbtree_loop(pmd->table, pmd->loop_col_num, pmd,
315 action_if_pattern_matches);
316 }
317
318 /**
319 * Compare two osl objects of string type.
320 *
321 * \param obj1 Pointer to the first object.
322 * \param obj2 Pointer to the second object.
323 *
324 * In any case, only \p MIN(obj1->size, obj2->size) characters of each string
325 * are taken into account.
326 *
327 * \return It returns an integer less than, equal to, or greater than zero if
328 * \a obj1 is found, respectively, to be less than, to match, or be greater than
329 * obj2.
330 *
331 * \sa strcmp(3), strncmp(3), osl_compare_func.
332 */
333 int string_compare(const struct osl_object *obj1, const struct osl_object *obj2)
334 {
335 const char *str1 = (const char *)obj1->data;
336 const char *str2 = (const char *)obj2->data;
337 return strncmp(str1, str2, PARA_MIN(obj1->size, obj2->size));
338 }
339
340 /*
341 * write input from fd to dynamically allocated buffer,
342 * but maximal max_size byte.
343 */
344 static int fd2buf(int fd, unsigned max_size, struct osl_object *obj)
345 {
346 const size_t chunk_size = 1024;
347 size_t size = 2048, received = 0;
348 int ret;
349 char *buf = para_malloc(size);
350
351 for (;;) {
352 ret = recv_bin_buffer(fd, buf + received, chunk_size);
353 if (ret <= 0)
354 break;
355 received += ret;
356 if (received + chunk_size >= size) {
357 size *= 2;
358 ret = -E_INPUT_TOO_LARGE;
359 if (size > max_size)
360 break;
361 buf = para_realloc(buf, size);
362 }
363 }
364 obj->data = buf;
365 obj->size = received;
366 if (ret < 0)
367 free(buf);
368 return ret;
369 }
370
371 /**
372 * Read data from a file descriptor, and send it to the afs process.
373 *
374 * \param fd File descriptor to read data from.
375 * \param arg_obj Pointer to the arguments to \a f.
376 * \param f The callback function.
377 * \param max_len Don't read more than that many bytes from stdin.
378 * \param result The result of the query is stored here.
379 *
380 * This function is used by commands that wish to let para_server store
381 * arbitrary data specified by the user (for instance the add_blob family of
382 * commands). First, at most \a max_len bytes are read from \a fd, the result
383 * is concatenated with the buffer given by \a arg_obj, and the combined buffer
384 * is made available to the parent process via shared memory.
385 *
386 * \return Negative on errors, the return value of the underlying call to
387 * send_callback_request() otherwise.
388 */
389 int stdin_command(int fd, struct osl_object *arg_obj, callback_function *f,
390 unsigned max_len, struct osl_object *result)
391 {
392 struct osl_object query, stdin_obj;
393 int ret;
394
395 ret = send_buffer(fd, AWAITING_DATA_MSG);
396 if (ret < 0)
397 return ret;
398 ret = fd2buf(fd, max_len, &stdin_obj);
399 if (ret < 0)
400 return ret;
401 query.size = arg_obj->size + stdin_obj.size;
402 query.data = para_malloc(query.size);
403 memcpy(query.data, arg_obj->data, arg_obj->size);
404 memcpy((char *)query.data + arg_obj->size, stdin_obj.data, stdin_obj.size);
405 free(stdin_obj.data);
406 ret = send_callback_request(f, &query, result);
407 free(query.data);
408 return ret;
409 }
410
411 /**
412 * Open the audio file with highest score.
413 *
414 * \param afd Audio file data is returned here.
415 *
416 * This stores all information for streaming the "best" audio file
417 * in the \a afd structure.
418 *
419 * \return Positive on success, negative on errors.
420 *
421 * \sa close_audio_file(), open_and_update_audio_file().
422 */
423 int open_next_audio_file(struct audio_file_data *afd)
424 {
425 struct osl_row *aft_row;
426 int ret;
427 for (;;) {
428 ret = score_get_best(&aft_row, &afd->score);
429 if (ret < 0)
430 return ret;
431 ret = open_and_update_audio_file(aft_row, afd);
432 if (ret >= 0)
433 return ret;
434 }
435 }
436
437 /**
438 * Free all resources which were allocated by open_next_audio_file().
439 *
440 * \param afd The structure previously filled in by open_next_audio_file().
441 *
442 * \return The return value of the underlying call to para_munmap().
443 *
444 * \sa open_next_audio_file().
445 */
446 int close_audio_file(struct audio_file_data *afd)
447 {
448 free(afd->afhi.chunk_table);
449 return para_munmap(afd->map.data, afd->map.size);
450 }
451
452 #if 0
453 static void play_loop(enum play_mode current_play_mode)
454 {
455 int i, ret;
456 struct audio_file_data afd;
457
458 afd.current_play_mode = current_play_mode;
459 for (i = 0; i < 0; i++) {
460 ret = open_next_audio_file(&afd);
461 if (ret < 0) {
462 PARA_ERROR_LOG("failed to open next audio file: %d\n", ret);
463 return;
464 }
465 PARA_NOTICE_LOG("next audio file: %s, score: %li\n", afd.path, afd.score);
466 sleep(1);
467 close_audio_file(&afd);
468 }
469 }
470 #endif
471
472
473 static enum play_mode init_admissible_files(void)
474 {
475 int ret;
476 char *given_mood, *given_playlist;
477
478 given_mood = "mood_that_was_given_at_the_command_line";
479 given_playlist = "given_playlist";
480
481 if (given_mood) {
482 ret = change_current_mood(given_mood);
483 if (ret >= 0) {
484 if (given_playlist)
485 PARA_WARNING_LOG("ignoring playlist %s\n",
486 given_playlist);
487 return PLAY_MODE_MOOD;
488 }
489 }
490 if (given_playlist) {
491 ret = playlist_open(given_playlist);
492 if (ret >= 0)
493 return PLAY_MODE_PLAYLIST;
494 }
495 ret = change_current_mood(NULL); /* open first available mood */
496 if (ret >= 0)
497 return PLAY_MODE_MOOD;
498 change_current_mood(""); /* open dummy mood, always successful */
499 return PLAY_MODE_MOOD;
500 }
501
502 static int setup_command_socket_or_die(void)
503 {
504 int ret;
505 char *socket_name = conf.afs_socket_arg;
506 struct sockaddr_un unix_addr;
507
508 unlink(socket_name);
509 ret = create_local_socket(socket_name, &unix_addr,
510 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
511 if (ret < 0) {
512 PARA_EMERG_LOG("%s: %s\n", PARA_STRERROR(-ret), socket_name);
513 exit(EXIT_FAILURE);
514 }
515 if (listen(ret , 5) < 0) {
516 PARA_EMERG_LOG("%s", "can not listen on socket\n");
517 exit(EXIT_FAILURE);
518 }
519 PARA_INFO_LOG("listening on command socket %s (fd %d)\n", socket_name,
520 ret);
521 return ret;
522 }
523
524 static int server_socket;
525 static struct command_task command_task_struct;
526 static struct signal_task signal_task_struct;
527
528 static void unregister_tasks(void)
529 {
530 unregister_task(&command_task_struct.task);
531 unregister_task(&signal_task_struct.task);
532 }
533
534 static void close_afs_tables(enum osl_close_flags flags)
535 {
536 PARA_NOTICE_LOG("closing afs_tables\n");
537 score_shutdown(flags);
538 attribute_shutdown(flags);
539 close_current_mood();
540 playlist_close();
541 moods_shutdown(flags);
542 playlists_shutdown(flags);
543 lyrics_shutdown(flags);
544 images_shutdown(flags);
545 aft_shutdown(flags);
546 }
547
548 static void signal_pre_select(struct sched *s, struct task *t)
549 {
550 struct signal_task *st = t->private_data;
551 t->ret = 1;
552 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
553 }
554
555 static void signal_post_select(struct sched *s, struct task *t)
556 {
557 struct signal_task *st = t->private_data;
558 t->ret = 1;
559 if (!FD_ISSET(st->fd, &s->rfds))
560 return;
561 st->signum = para_next_signal();
562 t->ret = 1;
563 if (st->signum == SIGUSR1)
564 return; /* ignore SIGUSR1 */
565 PARA_NOTICE_LOG("caught signal %d\n", st->signum);
566 t->ret = -E_SIGNAL_CAUGHT;
567 unregister_tasks();
568 }
569
570 static void register_signal_task(void)
571 {
572 struct signal_task *st = &signal_task_struct;
573 st->fd = para_signal_init();
574 PARA_INFO_LOG("signal pipe: fd %d\n", st->fd);
575 para_install_sighandler(SIGINT);
576 para_install_sighandler(SIGTERM);
577 para_install_sighandler(SIGPIPE);
578
579 st->task.pre_select = signal_pre_select;
580 st->task.post_select = signal_post_select;
581 st->task.private_data = st;
582 sprintf(st->task.status, "signal task");
583 register_task(&st->task);
584 }
585
586 static void command_pre_select(struct sched *s, struct task *t)
587 {
588 struct command_task *ct = t->private_data;
589 t->ret = 1;
590 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
591 }
592
593 /*
594 * On errors, negative value is written to fd.
595 * On success: If query produced a result, the result_shmid is written to fd.
596 * Otherwise, zero is written.
597 */
598 static int call_callback(int fd, int query_shmid)
599 {
600 void *query_shm, *result_shm;
601 struct callback_query *cq;
602 struct callback_result *cr;
603 struct osl_object query, result = {.data = NULL};
604 int result_shmid = -1, ret, ret2;
605
606 ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
607 if (ret < 0)
608 goto out;
609 cq = query_shm;
610 query.data = (char *)query_shm + sizeof(*cq);
611 query.size = cq->query_size;
612 ret = cq->handler(&query, &result);
613 ret2 = shm_detach(query_shm);
614 if (ret2 < 0 && ret >= 0)
615 ret = ret2;
616 if (ret < 0)
617 goto out;
618 ret = 0;
619 if (!result.data || !result.size)
620 goto out;
621 ret = shm_new(result.size + sizeof(struct callback_result));
622 if (ret < 0)
623 goto out;
624 result_shmid = ret;
625 ret = shm_attach(result_shmid, ATTACH_RW, &result_shm);
626 if (ret < 0)
627 goto out;
628 cr = result_shm;
629 cr->result_size = result.size;
630 memcpy(result_shm + sizeof(*cr), result.data, result.size);
631 ret = shm_detach(result_shm);
632 if (ret < 0)
633 goto out;
634 ret = result_shmid;
635 out:
636 free(result.data);
637 ret2 = send_bin_buffer(fd, (char *)&ret, sizeof(int));
638 if (ret < 0 || ret2 < 0) {
639 if (result_shmid >= 0)
640 if (shm_destroy(result_shmid) < 0)
641 PARA_ERROR_LOG("destroy result failed\n");
642 if (ret >= 0)
643 ret = ret2;
644 }
645 return ret;
646 }
647
648 static void command_post_select(struct sched *s, struct task *t)
649 {
650 struct command_task *ct = t->private_data;
651 struct sockaddr_un unix_addr;
652 char buf[sizeof(uint32_t) + sizeof(int)];
653 uint32_t cookie;
654 int query_shmid, fd;
655
656 t->ret = 1;
657 if (!FD_ISSET(ct->fd, &s->rfds))
658 return;
659 t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
660 if (t->ret < 0)
661 return;
662 /*
663 * The following errors may be caused by a malicious local user. So do
664 * not return an error in this case as this would terminate para_afs
665 * and para_server.
666 */
667 fd = t->ret;
668 /* FIXME: This is easily dosable (peer doesn't send data) */
669 t->ret = recv_bin_buffer(fd, buf, sizeof(buf));
670 if (t->ret < 0) {
671 PARA_NOTICE_LOG("%s (%d)\n", PARA_STRERROR(-t->ret), t->ret);
672 goto out;
673 }
674 if (t->ret != sizeof(buf)) {
675 PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
676 t->ret, (long unsigned) sizeof(buf));
677 goto out;
678 }
679 cookie = *(uint32_t *)buf;
680 if (cookie != ct->cookie) {
681 PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n",
682 (unsigned)cookie, (unsigned)ct->cookie);
683 goto out;
684 }
685 query_shmid = *(int *)(buf + sizeof(cookie));
686 if (query_shmid < 0) {
687 PARA_WARNING_LOG("received invalid query shmid %d)\n",
688 query_shmid);
689 goto out;
690 }
691 /* Ignore return value: Errors might be ok here. */
692 call_callback(fd, query_shmid);
693 out:
694 t->ret = 1;
695 close(fd);
696 }
697
698 static void register_command_task(uint32_t cookie)
699 {
700 struct command_task *ct = &command_task_struct;
701 ct->fd = setup_command_socket_or_die();
702 ct->cookie = cookie;
703
704 ct->task.pre_select = command_pre_select;
705 ct->task.post_select = command_post_select;
706 ct->task.private_data = ct;
707 sprintf(ct->task.status, "command task");
708 register_task(&ct->task);
709 }
710
711 void register_tasks(uint32_t cookie)
712 {
713 register_signal_task();
714 register_command_task(cookie);
715 }
716
717 static char *database_dir;
718
719 static int make_database_dir(void)
720 {
721 int ret;
722
723 if (!database_dir) {
724 if (conf.afs_database_dir_given)
725 database_dir = para_strdup(conf.afs_database_dir_arg);
726 else {
727 char *home = para_homedir();
728 database_dir = make_message(
729 "%s/.paraslash/afs_database", home);
730 free(home);
731 }
732 }
733 PARA_INFO_LOG("afs_database dir %s\n", database_dir);
734 ret = para_mkdir(database_dir, 0777);
735 if (ret >= 0 || ret == -E_EXIST)
736 return 1;
737 free(database_dir);
738 database_dir = NULL;
739 return ret;
740 }
741
742 static int open_afs_tables(void)
743 {
744 int ret = make_database_dir();
745
746 if (ret < 0)
747 return ret;
748 ret = attribute_init(&afs_tables[TBLNUM_ATTRIBUTES], database_dir);
749 if (ret < 0)
750 return ret;
751 ret = moods_init(&afs_tables[TBLNUM_MOODS], database_dir);
752 if (ret < 0)
753 goto moods_init_error;
754 ret = playlists_init(&afs_tables[TBLNUM_PLAYLIST], database_dir);
755 if (ret < 0)
756 goto playlists_init_error;
757 ret = lyrics_init(&afs_tables[TBLNUM_LYRICS], database_dir);
758 if (ret < 0)
759 goto lyrics_init_error;
760 ret = images_init(&afs_tables[TBLNUM_IMAGES], database_dir);
761 if (ret < 0)
762 goto images_init_error;
763 ret = score_init(&afs_tables[TBLNUM_SCORES], database_dir);
764 if (ret < 0)
765 goto score_init_error;
766 ret = aft_init(&afs_tables[TBLNUM_AUDIO_FILES], database_dir);
767 if (ret < 0)
768 goto aft_init_error;
769 return 1;
770
771 aft_init_error:
772 score_shutdown(OSL_MARK_CLEAN);
773 score_init_error:
774 images_shutdown(OSL_MARK_CLEAN);
775 images_init_error:
776 lyrics_shutdown(OSL_MARK_CLEAN);
777 lyrics_init_error:
778 playlists_shutdown(OSL_MARK_CLEAN);
779 playlists_init_error:
780 moods_shutdown(OSL_MARK_CLEAN);
781 moods_init_error:
782 attribute_shutdown(OSL_MARK_CLEAN);
783 return ret;
784 }
785
786 __noreturn int afs_init(uint32_t cookie, int socket_fd)
787 {
788 enum play_mode current_play_mode;
789 struct sched s;
790 int ret = open_afs_tables();
791
792 if (ret < 0) {
793 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
794 exit(EXIT_FAILURE);
795 }
796 server_socket = socket_fd;
797 ret = mark_fd_nonblock(server_socket);
798 if (ret < 0)
799 exit(EXIT_FAILURE);
800 PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n",
801 server_socket, (unsigned) cookie);
802 current_play_mode = init_admissible_files();
803 register_tasks(cookie);
804 s.default_timeout.tv_sec = 0;
805 s.default_timeout.tv_usec = 99 * 1000;
806 ret = sched(&s);
807 if (ret < 0)
808 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
809 close_afs_tables(OSL_MARK_CLEAN);
810 exit(EXIT_FAILURE);
811 }
812
813 static int create_tables_callback(const struct osl_object *query,
814 __a_unused struct osl_object *result)
815 {
816 uint32_t table_mask = *(uint32_t *)query->data;
817 int i, ret;
818
819 close_afs_tables(OSL_MARK_CLEAN);
820 for (i = 0; i < NUM_AFS_TABLES; i++) {
821 struct table_info *ti = afs_tables + i;
822
823 if (ti->flags & TBLFLAG_SKIP_CREATE)
824 continue;
825 if (!(table_mask & (1 << i)))
826 continue;
827 ret = osl_create_table(ti->desc);
828 if (ret < 0)
829 return ret;
830 }
831 ret = open_afs_tables();
832 return ret < 0? ret: 0;
833 }
834
835 int com_init(int fd, int argc, char * const * const argv)
836 {
837 int i, j, ret;
838 uint32_t table_mask = (1 << (NUM_AFS_TABLES + 1)) - 1;
839 struct osl_object query = {.data = &table_mask,
840 .size = sizeof(table_mask)};
841
842 if (argc != 1) {
843 table_mask = 0;
844 for (i = 1; i < argc; i++) {
845 for (j = 0; j < NUM_AFS_TABLES; j++) {
846 struct table_info *ti = afs_tables + j;
847
848 if (ti->flags & TBLFLAG_SKIP_CREATE)
849 continue;
850 if (strcmp(argv[i], ti->desc->name))
851 continue;
852 table_mask |= (1 << j);
853 break;
854 }
855 if (j == NUM_AFS_TABLES)
856 return -E_BAD_TABLE_NAME;
857 }
858 }
859 ret = send_callback_request(create_tables_callback, &query, NULL);
860 if (ret < 0)
861 return ret;
862 return send_va_buffer(fd, "successfully created afs table(s)\n");
863 }
864
865 enum com_check_flags {
866 CHECK_AFT = 1,
867 CHECK_MOODS = 2,
868 CHECK_PLAYLISTS = 4
869 };
870
871 int com_check(int fd, int argc, char * const * const argv)
872 {
873 unsigned flags = 0;
874 int i, ret;
875 struct osl_object result;
876
877 for (i = 1; i < argc; i++) {
878 const char *arg = argv[i];
879 if (arg[0] != '-')
880 break;
881 if (!strcmp(arg, "--")) {
882 i++;
883 break;
884 }
885 if (!strcmp(arg, "-a")) {
886 flags |= CHECK_AFT;
887 continue;
888 }
889 if (!strcmp(arg, "-p")) {
890 flags |= CHECK_PLAYLISTS;
891 continue;
892 }
893 if (!strcmp(arg, "-m")) {
894 flags |= CHECK_MOODS;
895 continue;
896 }
897 return -E_AFS_SYNTAX;
898 }
899 if (i < argc)
900 return -E_AFS_SYNTAX;
901 if (!flags)
902 flags = ~0U;
903 if (flags & CHECK_AFT) {
904 ret = send_callback_request(aft_check_callback, NULL, &result);
905 if (ret < 0)
906 return ret;
907 if (ret > 0) {
908 ret = send_buffer(fd, (char *) result.data);
909 free(result.data);
910 if (ret < 0)
911 return ret;
912 }
913 }
914 if (flags & CHECK_PLAYLISTS) {
915 ret = send_callback_request(playlist_check_callback, NULL, &result);
916 if (ret < 0)
917 return ret;
918 if (ret > 0) {
919 ret = send_buffer(fd, (char *) result.data);
920 free(result.data);
921 if (ret < 0)
922 return ret;
923 }
924 }
925 if (flags & CHECK_MOODS) {
926 ret = send_callback_request(mood_check_callback, NULL, &result);
927 if (ret < 0)
928 return ret;
929 if (ret > 0) {
930 ret = send_buffer(fd, (char *) result.data);
931 free(result.data);
932 if (ret < 0)
933 return ret;
934 }
935 }
936 return 1;
937 }