afs.c: Fix documentation of stdin_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 data from a file descriptor, and send it to the afs process.
370 *
371 * \param fd File descriptor to read data from.
372 * \param arg_obj Pointer to the arguments to \a f.
373 * \param f The callback function.
374 * \param max_len Don't read more than that many bytes from stdin.
375 * \param result The result of the query is stored here.
376 *
377 * This function is used by commands that wish to let para_server store
378 * arbitrary data specified by the user (for instance the add_blob family of
379 * commands). First, at most \a max_len bytes are read from \a fd, the result
380 * is concatenated with the buffer given by \a arg_obj, and the combined buffer
381 * is made available to the parent process via shared memory.
382 *
383 * \return Negative on errors, the return value of the underlying call to
384 * send_callback_request() otherwise.
385 */
386 int stdin_command(int fd, struct osl_object *arg_obj, callback_function *f,
387 unsigned max_len, struct osl_object *result)
388 {
389 struct osl_object query, stdin_obj;
390 int ret;
391
392 ret = send_buffer(fd, AWAITING_DATA_MSG);
393 if (ret < 0)
394 return ret;
395 ret = fd2buf(fd, max_len, &stdin_obj);
396 if (ret < 0)
397 return ret;
398 query.size = arg_obj->size + stdin_obj.size;
399 query.data = para_malloc(query.size);
400 memcpy(query.data, arg_obj->data, arg_obj->size);
401 memcpy((char *)query.data + arg_obj->size, stdin_obj.data, stdin_obj.size);
402 free(stdin_obj.data);
403 ret = send_callback_request(f, &query, result);
404 free(query.data);
405 return ret;
406 }
407
408 /**
409 * Open the audio file with highest score.
410 *
411 * \param afd Audio file data is returned here.
412 *
413 * This stores all information for streaming the "best" audio file
414 * in the \a afd structure.
415 *
416 * \return Positive on success, negative on errors.
417 *
418 * \sa close_audio_file(), open_and_update_audio_file().
419 */
420 int open_next_audio_file(struct audio_file_data *afd)
421 {
422 struct osl_row *aft_row;
423 int ret;
424 for (;;) {
425 ret = score_get_best(&aft_row, &afd->score);
426 if (ret < 0)
427 return ret;
428 ret = open_and_update_audio_file(aft_row, afd);
429 if (ret >= 0)
430 return ret;
431 }
432 }
433
434 /**
435 * Free all resources which were allocated by open_next_audio_file().
436 *
437 * \param afd The structure previously filled in by open_next_audio_file().
438 *
439 * \return The return value of the underlying call to para_munmap().
440 *
441 * \sa open_next_audio_file().
442 */
443 int close_audio_file(struct audio_file_data *afd)
444 {
445 free(afd->afhi.chunk_table);
446 return para_munmap(afd->map.data, afd->map.size);
447 }
448
449 #if 0
450 static void play_loop(enum play_mode current_play_mode)
451 {
452 int i, ret;
453 struct audio_file_data afd;
454
455 afd.current_play_mode = current_play_mode;
456 for (i = 0; i < 0; i++) {
457 ret = open_next_audio_file(&afd);
458 if (ret < 0) {
459 PARA_ERROR_LOG("failed to open next audio file: %d\n", ret);
460 return;
461 }
462 PARA_NOTICE_LOG("next audio file: %s, score: %li\n", afd.path, afd.score);
463 sleep(1);
464 close_audio_file(&afd);
465 }
466 }
467 #endif
468
469
470 static enum play_mode init_admissible_files(void)
471 {
472 int ret;
473 char *given_mood, *given_playlist;
474
475 given_mood = "mood_that_was_given_at_the_command_line";
476 given_playlist = "given_playlist";
477
478 if (given_mood) {
479 ret = mood_open(given_mood);
480 if (ret >= 0) {
481 if (given_playlist)
482 PARA_WARNING_LOG("ignoring playlist %s\n",
483 given_playlist);
484 return PLAY_MODE_MOOD;
485 }
486 }
487 if (given_playlist) {
488 ret = playlist_open(given_playlist);
489 if (ret >= 0)
490 return PLAY_MODE_PLAYLIST;
491 }
492 ret = mood_open(NULL); /* open first available mood */
493 if (ret >= 0)
494 return PLAY_MODE_MOOD;
495 mood_open(""); /* open dummy mood, always successful */
496 return PLAY_MODE_MOOD;
497 }
498
499 static int setup_command_socket_or_die(void)
500 {
501 int ret;
502 char *socket_name = conf.afs_socket_arg;
503 struct sockaddr_un unix_addr;
504
505 unlink(socket_name);
506 ret = create_local_socket(socket_name, &unix_addr,
507 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
508 if (ret < 0) {
509 PARA_EMERG_LOG("%s: %s\n", PARA_STRERROR(-ret), socket_name);
510 exit(EXIT_FAILURE);
511 }
512 if (listen(ret , 5) < 0) {
513 PARA_EMERG_LOG("%s", "can not listen on socket\n");
514 exit(EXIT_FAILURE);
515 }
516 PARA_INFO_LOG("listening on command socket %s (fd %d)\n", socket_name,
517 ret);
518 return ret;
519 }
520
521 static int server_socket;
522 static struct command_task command_task_struct;
523 static struct signal_task signal_task_struct;
524
525 static void unregister_tasks(void)
526 {
527 unregister_task(&command_task_struct.task);
528 unregister_task(&signal_task_struct.task);
529 }
530
531 static void close_afs_tables(enum osl_close_flags flags)
532 {
533 PARA_NOTICE_LOG("closing afs_tables\n");
534 score_shutdown(flags);
535 attribute_shutdown(flags);
536 mood_close();
537 playlist_close();
538 moods_shutdown(flags);
539 playlists_shutdown(flags);
540 lyrics_shutdown(flags);
541 images_shutdown(flags);
542 aft_shutdown(flags);
543 }
544
545 static void signal_pre_select(struct sched *s, struct task *t)
546 {
547 struct signal_task *st = t->private_data;
548 t->ret = 1;
549 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
550 }
551
552 static void signal_post_select(struct sched *s, struct task *t)
553 {
554 struct signal_task *st = t->private_data;
555 t->ret = 1;
556 if (!FD_ISSET(st->fd, &s->rfds))
557 return;
558 st->signum = para_next_signal();
559 PARA_NOTICE_LOG("caught signal %d\n", st->signum);
560 t->ret = 1;
561 if (st->signum == SIGUSR1)
562 return; /* ignore SIGUSR1 */
563 t->ret = -E_SIGNAL_CAUGHT;
564 unregister_tasks();
565 }
566
567 static void register_signal_task(void)
568 {
569 struct signal_task *st = &signal_task_struct;
570 st->fd = para_signal_init();
571 PARA_INFO_LOG("signal pipe: fd %d\n", st->fd);
572 para_install_sighandler(SIGINT);
573 para_install_sighandler(SIGTERM);
574 para_install_sighandler(SIGPIPE);
575
576 st->task.pre_select = signal_pre_select;
577 st->task.post_select = signal_post_select;
578 st->task.private_data = st;
579 sprintf(st->task.status, "signal task");
580 register_task(&st->task);
581 }
582
583 static void command_pre_select(struct sched *s, struct task *t)
584 {
585 struct command_task *ct = t->private_data;
586 t->ret = 1;
587 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
588 }
589
590 /*
591 * On errors, negative value is written to fd.
592 * On success: If query produced a result, the result_shmid is written to fd.
593 * Otherwise, zero is written.
594 */
595 static int call_callback(int fd, int query_shmid)
596 {
597 void *query_shm, *result_shm;
598 struct callback_query *cq;
599 struct callback_result *cr;
600 struct osl_object query, result = {.data = NULL};
601 int result_shmid = -1, ret, ret2;
602
603 ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
604 if (ret < 0)
605 goto out;
606 cq = query_shm;
607 query.data = (char *)query_shm + sizeof(*cq);
608 query.size = cq->query_size;
609 ret = cq->handler(&query, &result);
610 ret2 = shm_detach(query_shm);
611 if (ret2 < 0 && ret >= 0)
612 ret = ret2;
613 if (ret < 0)
614 goto out;
615 ret = 0;
616 if (!result.data || !result.size)
617 goto out;
618 ret = shm_new(result.size + sizeof(struct callback_result));
619 if (ret < 0)
620 goto out;
621 result_shmid = ret;
622 ret = shm_attach(result_shmid, ATTACH_RW, &result_shm);
623 if (ret < 0)
624 goto out;
625 cr = result_shm;
626 cr->result_size = result.size;
627 memcpy(result_shm + sizeof(*cr), result.data, result.size);
628 ret = shm_detach(result_shm);
629 if (ret < 0)
630 goto out;
631 ret = result_shmid;
632 out:
633 free(result.data);
634 ret2 = send_bin_buffer(fd, (char *)&ret, sizeof(int));
635 if (ret < 0 || ret2 < 0) {
636 if (result_shmid >= 0)
637 if (shm_destroy(result_shmid) < 0)
638 PARA_ERROR_LOG("destroy result failed\n");
639 if (ret >= 0)
640 ret = ret2;
641 }
642 return ret;
643 }
644
645 static void command_post_select(struct sched *s, struct task *t)
646 {
647 struct command_task *ct = t->private_data;
648 struct sockaddr_un unix_addr;
649 char buf[sizeof(uint32_t) + sizeof(int)];
650 uint32_t cookie;
651 int query_shmid, fd;
652
653 t->ret = 1;
654 if (!FD_ISSET(ct->fd, &s->rfds))
655 return;
656 t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
657 if (t->ret < 0)
658 return;
659 /*
660 * The following errors may be caused by a malicious local user. So do
661 * not return an error in this case as this would terminate para_afs
662 * and para_server.
663 */
664 fd = t->ret;
665 /* FIXME: This is easily dosable (peer doesn't send data) */
666 t->ret = recv_bin_buffer(fd, buf, sizeof(buf));
667 if (t->ret < 0) {
668 PARA_NOTICE_LOG("%s (%d)\n", PARA_STRERROR(-t->ret), t->ret);
669 goto out;
670 }
671 if (t->ret != sizeof(buf)) {
672 PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
673 t->ret, (long unsigned) sizeof(buf));
674 goto out;
675 }
676 cookie = *(uint32_t *)buf;
677 if (cookie != ct->cookie) {
678 PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n",
679 (unsigned)cookie, (unsigned)ct->cookie);
680 goto out;
681 }
682 query_shmid = *(int *)(buf + sizeof(cookie));
683 if (query_shmid < 0) {
684 PARA_WARNING_LOG("received invalid query shmid %d)\n",
685 query_shmid);
686 goto out;
687 }
688 /* Ignore return value: Errors might be ok here. */
689 call_callback(fd, query_shmid);
690 out:
691 t->ret = 1;
692 close(fd);
693 }
694
695 static void register_command_task(uint32_t cookie)
696 {
697 struct command_task *ct = &command_task_struct;
698 ct->fd = setup_command_socket_or_die();
699 ct->cookie = cookie;
700
701 ct->task.pre_select = command_pre_select;
702 ct->task.post_select = command_post_select;
703 ct->task.private_data = ct;
704 sprintf(ct->task.status, "command task");
705 register_task(&ct->task);
706 }
707
708 void register_tasks(uint32_t cookie)
709 {
710 register_signal_task();
711 register_command_task(cookie);
712 }
713
714 static char *database_dir;
715
716 static int make_database_dir(void)
717 {
718 int ret;
719
720 if (!database_dir) {
721 if (conf.afs_database_dir_given)
722 database_dir = para_strdup(conf.afs_database_dir_arg);
723 else {
724 char *home = para_homedir();
725 database_dir = make_message(
726 "%s/.paraslash/afs_database", home);
727 free(home);
728 }
729 }
730 PARA_INFO_LOG("afs_database dir %s\n", database_dir);
731 ret = para_mkdir(database_dir, 0777);
732 if (ret >= 0 || ret == -E_EXIST)
733 return 1;
734 free(database_dir);
735 database_dir = NULL;
736 return ret;
737 }
738
739 static int open_afs_tables(void)
740 {
741 int ret = make_database_dir();
742
743 if (ret < 0)
744 return ret;
745 ret = attribute_init(&afs_tables[TBLNUM_ATTRIBUTES], database_dir);
746 if (ret < 0)
747 return ret;
748 ret = moods_init(&afs_tables[TBLNUM_MOODS], database_dir);
749 if (ret < 0)
750 goto moods_init_error;
751 ret = playlists_init(&afs_tables[TBLNUM_PLAYLIST], database_dir);
752 if (ret < 0)
753 goto playlists_init_error;
754 ret = lyrics_init(&afs_tables[TBLNUM_LYRICS], database_dir);
755 if (ret < 0)
756 goto lyrics_init_error;
757 ret = images_init(&afs_tables[TBLNUM_IMAGES], database_dir);
758 if (ret < 0)
759 goto images_init_error;
760 ret = score_init(&afs_tables[TBLNUM_SCORES], database_dir);
761 if (ret < 0)
762 goto score_init_error;
763 ret = aft_init(&afs_tables[TBLNUM_AUDIO_FILES], database_dir);
764 if (ret < 0)
765 goto aft_init_error;
766 return 1;
767
768 aft_init_error:
769 score_shutdown(OSL_MARK_CLEAN);
770 score_init_error:
771 images_shutdown(OSL_MARK_CLEAN);
772 images_init_error:
773 lyrics_shutdown(OSL_MARK_CLEAN);
774 lyrics_init_error:
775 playlists_shutdown(OSL_MARK_CLEAN);
776 playlists_init_error:
777 moods_shutdown(OSL_MARK_CLEAN);
778 moods_init_error:
779 attribute_shutdown(OSL_MARK_CLEAN);
780 return ret;
781 }
782
783 __noreturn int afs_init(uint32_t cookie, int socket_fd)
784 {
785 enum play_mode current_play_mode;
786 struct sched s;
787 int ret = open_afs_tables();
788
789 if (ret < 0) {
790 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
791 exit(EXIT_FAILURE);
792 }
793 server_socket = socket_fd;
794 ret = mark_fd_nonblock(server_socket);
795 if (ret < 0)
796 exit(EXIT_FAILURE);
797 PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n",
798 server_socket, (unsigned) cookie);
799 current_play_mode = init_admissible_files();
800 register_tasks(cookie);
801 s.default_timeout.tv_sec = 0;
802 s.default_timeout.tv_usec = 99 * 1000;
803 ret = sched(&s);
804 if (ret < 0)
805 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
806 close_afs_tables(OSL_MARK_CLEAN);
807 exit(EXIT_FAILURE);
808 }
809
810 static int create_tables_callback(const struct osl_object *query,
811 __a_unused struct osl_object *result)
812 {
813 uint32_t table_mask = *(uint32_t *)query->data;
814 int i, ret;
815
816 close_afs_tables(OSL_MARK_CLEAN);
817 for (i = 0; i < NUM_AFS_TABLES; i++) {
818 struct table_info *ti = afs_tables + i;
819
820 if (ti->flags & TBLFLAG_SKIP_CREATE)
821 continue;
822 if (!(table_mask & (1 << i)))
823 continue;
824 ret = osl_create_table(ti->desc);
825 if (ret < 0)
826 return ret;
827 }
828 ret = open_afs_tables();
829 return ret < 0? ret: 0;
830 }
831
832 int com_init(int fd, int argc, char * const * const argv)
833 {
834 int i, j, ret;
835 uint32_t table_mask = (1 << (NUM_AFS_TABLES + 1)) - 1;
836 struct osl_object query = {.data = &table_mask,
837 .size = sizeof(table_mask)};
838
839 if (argc != 1) {
840 table_mask = 0;
841 for (i = 1; i < argc; i++) {
842 for (j = 0; j < NUM_AFS_TABLES; j++) {
843 struct table_info *ti = afs_tables + j;
844
845 if (ti->flags & TBLFLAG_SKIP_CREATE)
846 continue;
847 if (strcmp(argv[i], ti->desc->name))
848 continue;
849 table_mask |= (1 << j);
850 break;
851 }
852 if (j == NUM_AFS_TABLES)
853 return -E_BAD_TABLE_NAME;
854 }
855 }
856 ret = send_callback_request(create_tables_callback, &query, NULL);
857 if (ret < 0)
858 return ret;
859 return send_va_buffer(fd, "successfully created afs table(s)\n");
860 }
861
862 enum com_check_flags {
863 CHECK_AFT = 1,
864 CHECK_MOODS = 2,
865 CHECK_PLAYLISTS = 4
866 };
867
868 int com_check(int fd, int argc, char * const * const argv)
869 {
870 unsigned flags = 0;
871 int i, ret;
872 struct osl_object result;
873
874 for (i = 1; i < argc; i++) {
875 const char *arg = argv[i];
876 if (arg[0] != '-')
877 break;
878 if (!strcmp(arg, "--")) {
879 i++;
880 break;
881 }
882 if (!strcmp(arg, "-a")) {
883 flags |= CHECK_AFT;
884 continue;
885 }
886 if (!strcmp(arg, "-p")) {
887 flags |= CHECK_PLAYLISTS;
888 continue;
889 }
890 if (!strcmp(arg, "-m")) {
891 flags |= CHECK_MOODS;
892 continue;
893 }
894 return -E_AFS_SYNTAX;
895 }
896 if (i < argc)
897 return -E_AFS_SYNTAX;
898 if (!flags)
899 flags = ~0U;
900 if (flags & CHECK_AFT) {
901 ret = send_callback_request(aft_check_callback, NULL, &result);
902 if (ret < 0)
903 return ret;
904 if (ret > 0) {
905 ret = send_buffer(fd, (char *) result.data);
906 free(result.data);
907 if (ret < 0)
908 return ret;
909 }
910 }
911 if (flags & CHECK_PLAYLISTS) {
912 ret = send_callback_request(playlist_check_callback, NULL, &result);
913 if (ret < 0)
914 return ret;
915 if (ret > 0) {
916 ret = send_buffer(fd, (char *) result.data);
917 free(result.data);
918 if (ret < 0)
919 return ret;
920 }
921 }
922 return 1;
923 }