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