para_server: Initialize the new afs.
[paraslash.git] / afs.c
1 #include "para.h"
2 #include "afh.h"
3 #include "error.h"
4 #include <dirent.h> /* readdir() */
5 #include <sys/mman.h>
6 #include <sys/time.h>
7
8
9 #include "net.h"
10 #include "afs.h"
11 #include "ipc.h"
12 #include "string.h"
13
14 /** \file afs.c Paraslash's audio file selector. */
15
16 static uint32_t socket_cookie;
17
18 /**
19 * Compare two osl objects of string type.
20 *
21 * \param obj1 Pointer to the first object.
22 * \param obj2 Pointer to the second object.
23 *
24 * In any case, only \p MIN(obj1->size, obj2->size) characters of each string
25 * are taken into account.
26 *
27 * \return It returns an integer less than, equal to, or greater than zero if
28 * \a obj1 is found, respectively, to be less than, to match, or be greater than
29 * obj2.
30 *
31 * \sa strcmp(3), strncmp(3), osl_compare_func.
32 */
33 int string_compare(const struct osl_object *obj1, const struct osl_object *obj2)
34 {
35 const char *str1 = (const char *)obj1->data;
36 const char *str2 = (const char *)obj2->data;
37 return strncmp(str1, str2, PARA_MIN(obj1->size, obj2->size));
38 }
39
40 /** The osl tables used by afs. \sa blob.c */
41 enum afs_table_num {
42 /** Contains audio file information. See aft.c. */
43 TBLNUM_AUDIO_FILES,
44 /** The table for the paraslash attributes. See attribute.c. */
45 TBLNUM_ATTRIBUTES,
46 /**
47 * Paraslash's scoring system is based on Gaussian normal
48 * distributions, and the relevant data is stored in the rbtrees of an
49 * osl table containing only volatile columns. See score.c for
50 * details.
51 */
52 TBLNUM_SCORES,
53 /**
54 * A standard blob table containing the mood definitions. For details
55 * see mood.c.
56 */
57 TBLNUM_MOODS,
58 /** A blob table containing lyrics on a per-song basis. */
59 TBLNUM_LYRICS,
60 /** Another blob table for images (for example album cover art). */
61 TBLNUM_IMAGES,
62 /** Yet another blob table for storing standard playlists. */
63 TBLNUM_PLAYLIST,
64 /** How many tables are in use? */
65 NUM_AFS_TABLES
66 };
67
68 static struct table_info afs_tables[NUM_AFS_TABLES];
69
70
71 /**
72 * A wrapper for strtol(3).
73 *
74 * \param str The string to be converted to a long integer.
75 * \param result The converted value is stored here.
76 *
77 * \return Positive on success, -E_ATOL on errors.
78 *
79 * \sa strtol(3), atoi(3).
80 */
81 int para_atol(const char *str, long *result)
82 {
83 char *endptr;
84 long val;
85 int ret, base = 10;
86
87 errno = 0; /* To distinguish success/failure after call */
88 val = strtol(str, &endptr, base);
89 ret = -E_ATOL;
90 if (errno == ERANGE && (val == LONG_MAX || val == LONG_MIN))
91 goto out; /* overflow */
92 if (errno != 0 && val == 0)
93 goto out; /* other error */
94 if (endptr == str)
95 goto out; /* No digits were found */
96 if (*endptr != '\0')
97 goto out; /* Further characters after number */
98 *result = val;
99 ret = 1;
100 out:
101 return ret;
102 }
103
104 /**
105 * Struct to let para_server call a function specified from child context.
106 *
107 * Commands that need to change the state of para_server can't
108 * change the relevant data structures directly because commands
109 * are executed in a child process, i.e. they get their own
110 * virtual address space. This structure must be used to let
111 * para_server (i.e. the parent process) call a function specified
112 * by the child (the command handler).
113 *
114 * \sa fork(2), ipc.c.
115 */
116 struct callback_data {
117 /** The function to be called. */
118 callback_function *handler;
119 /** The sma for the parameters of the callback function. */
120 int query_shmid;
121 /** The size of the query sma. */
122 size_t query_size;
123 /** If the callback produced a result, it is stored in this sma. */
124 int result_shmid;
125 /** The size of the result sma. */
126 size_t result_size;
127 /** The return value of the callback function. */
128 int callback_ret;
129 /** The return value of the callback() procedure. */
130 int sma_ret;
131 };
132
133 static struct callback_data *shm_callback_data;
134 static int callback_mutex;
135 static int child_mutex;
136 static int result_mutex;
137
138 /**
139 * Ask the parent process to call a given function.
140 *
141 * \param f The function to be called.
142 * \param query Pointer to arbitrary data for the callback.
143 * \param result Callback result will be stored here.
144 *
145 * This function creates a shared memory area, copies the buffer pointed to by
146 * \a buf to that area and notifies the parent process that \a f should be
147 * called ASAP. It provides proper locking via semaphores to protect against
148 * concurent access to the shared memory area and against concurrent access by
149 * another child process that asks to call the same function.
150 *
151 * \return Negative, if the shared memory area could not be set up. The return
152 * value of the callback function otherwise.
153 *
154 * \sa shm_new(), shm_attach(), shm_detach(), mutex_lock(), mutex_unlock(),
155 * shm_destroy(), struct callback_data, send_option_arg_callback_request(),
156 * send_standard_callback_request().
157 */
158 int send_callback_request(callback_function *f, struct osl_object *query,
159 struct osl_object *result)
160 {
161 struct callback_data cbd = {.handler = f};
162 int ret;
163 void *query_sma;
164
165 assert(query->data && query->size);
166 ret = shm_new(query->size);
167 if (ret < 0)
168 return ret;
169 cbd.query_shmid = ret;
170 cbd.query_size = query->size;
171 ret = shm_attach(cbd.query_shmid, ATTACH_RW, &query_sma);
172 if (ret < 0)
173 goto out;
174 memcpy(query_sma, query->data, query->size);
175 ret = shm_detach(query_sma);
176 if (ret < 0)
177 goto out;
178 /* prevent other children from interacting */
179 mutex_lock(child_mutex);
180 /* prevent parent from messing with shm_callback_data. */
181 mutex_lock(callback_mutex);
182 /* all three mutexes are locked, set parameters for callback */
183 *shm_callback_data = cbd;
184 /* unblock parent */
185 mutex_unlock(callback_mutex);
186 kill(getppid(), SIGUSR1); /* wake up parent */
187 /*
188 * At this time only the parent can run. It will execute our callback
189 * and unlock the result_mutex when ready to indicate that the child
190 * may use the result. So let's sleep on this mutex.
191 */
192 mutex_lock(result_mutex);
193 /* No need to aquire the callback mutex again */
194 ret = shm_callback_data->sma_ret;
195 if (ret < 0) /* sma problem, callback might not have been executed */
196 goto unlock_child_mutex;
197 if (shm_callback_data->result_shmid >= 0) { /* parent provided a result */
198 void *sma;
199 ret = shm_attach(shm_callback_data->result_shmid, ATTACH_RO,
200 &sma);
201 if (ret >= 0) {
202 if (result) { /* copy result */
203 result->size = shm_callback_data->result_size;
204 result->data = para_malloc(result->size);
205 memcpy(result->data, sma, result->size);
206 ret = shm_detach(sma);
207 if (ret < 0)
208 PARA_ERROR_LOG("can not detach result\n");
209 } else
210 PARA_WARNING_LOG("no result pointer\n");
211 } else
212 PARA_ERROR_LOG("attach result failed: %d\n", ret);
213 if (shm_destroy(shm_callback_data->result_shmid) < 0)
214 PARA_ERROR_LOG("destroy result failed\n");
215 } else { /* no result from callback */
216 if (result) {
217 PARA_WARNING_LOG("callback has no result\n");
218 result->data = NULL;
219 result->size = 0;
220 }
221 }
222 ret = shm_callback_data->callback_ret;
223 unlock_child_mutex:
224 /* give other children a chance */
225 mutex_unlock(child_mutex);
226 out:
227 if (shm_destroy(cbd.query_shmid) < 0)
228 PARA_ERROR_LOG("%s\n", "shm destroy error");
229 PARA_DEBUG_LOG("callback_ret: %d\n", ret);
230 return ret;
231 }
232
233 /**
234 * Send a callback request passing an options structure and an argument vector.
235 *
236 * \param options pointer to an arbitrary data structure.
237 * \param argc Argument count.
238 * \param argv Standard argument vector.
239 * \param f The callback function.
240 * \param result The result of the query is stored here.
241 *
242 * Some commands have a couple of options that are parsed in child context for
243 * syntactic correctness and are stored in a special options structure for that
244 * command. This function allows to pass such a structure together with a list
245 * of further arguments (often a list of audio files) to the parent process.
246 *
247 * \sa send_standard_callback_request(), send_callback_request().
248 */
249 int send_option_arg_callback_request(struct osl_object *options,
250 int argc, const char **argv, callback_function *f,
251 struct osl_object *result)
252 {
253 char *p;
254 int i, ret;
255 struct osl_object query = {.size = options? options->size : 0};
256
257 for (i = 0; i < argc; i++)
258 query.size += strlen(argv[i]) + 1;
259 query.data = para_malloc(query.size);
260 p = query.data;
261 if (options) {
262 memcpy(query.data, options->data, options->size);
263 p += options->size;
264 }
265 for (i = 0; i < argc; i++) {
266 strcpy(p, argv[i]); /* OK */
267 p += strlen(argv[i]) + 1;
268 }
269 ret = send_callback_request(f, &query, result);
270 free(query.data);
271 return ret;
272 }
273
274 /**
275 * Send a callback request with an argument vector only.
276 *
277 * \param argc The same meaning as in send_option_arg_callback_request().
278 * \param argv The same meaning as in send_option_arg_callback_request().
279 * \param f The same meaning as in send_option_arg_callback_request().
280 * \param result The same meaning as in send_option_arg_callback_request().
281 *
282 * This is similar to send_option_arg_callback_request(), but no options buffer
283 * is passed to the parent process.
284 *
285 * \return The return value of the underlying call to
286 * send_option_arg_callback_request().
287 */
288 int send_standard_callback_request(int argc, const char **argv,
289 callback_function *f, struct osl_object *result)
290 {
291 return send_option_arg_callback_request(NULL, argc, argv, f, result);
292 }
293
294 /*
295 * write input from fd to dynamically allocated char array,
296 * but maximal max_size byte. Return size.
297 */
298 static int fd2buf(int fd, char **buf, int max_size)
299 {
300 const size_t chunk_size = 1024;
301 size_t size = 2048;
302 char *p;
303 int ret;
304
305 *buf = para_malloc(size * sizeof(char));
306 p = *buf;
307 while ((ret = read(fd, p, chunk_size)) > 0) {
308 p += ret;
309 if ((p - *buf) + chunk_size >= size) {
310 char *tmp;
311
312 size *= 2;
313 if (size > max_size) {
314 ret = -E_INPUT_TOO_LARGE;
315 goto out;
316 }
317 tmp = para_realloc(*buf, size);
318 p = (p - *buf) + tmp;
319 *buf = tmp;
320 }
321 }
322 if (ret < 0) {
323 ret = -E_READ;
324 goto out;
325 }
326 ret = p - *buf;
327 out:
328 if (ret < 0 && *buf)
329 free(*buf);
330 return ret;
331 }
332
333 /**
334 * Read from stdin, and send the result to the parent process.
335 *
336 * \param arg_obj Pointer to the arguments to \a f.
337 * \param f The callback function.
338 * \param max_len Don't read more than that many bytes from stdin.
339 * \param result The result of the query is stored here.
340 *
341 * This function is used by commands that wish to let para_server store
342 * arbitrary data specified by the user (for instance the add_blob family of
343 * commands). First, at most \a max_len bytes are read from stdin, the result
344 * is concatenated with the buffer given by \a arg_obj, and the combined buffer
345 * is made available to the parent process via shared memory.
346 *
347 * \return Negative on errors, the return value of the underlying call to
348 * send_callback_request() otherwise.
349 */
350 int stdin_command(struct osl_object *arg_obj, callback_function *f,
351 unsigned max_len, struct osl_object *result)
352 {
353 char *stdin_buf;
354 size_t stdin_len;
355 struct osl_object query;
356 int ret = fd2buf(STDIN_FILENO, &stdin_buf, max_len);
357
358 if (ret < 0)
359 return ret;
360 stdin_len = ret;
361 query.size = arg_obj->size + stdin_len;
362 query.data = para_malloc(query.size);
363 memcpy(query.data, arg_obj->data, arg_obj->size);
364 memcpy((char *)query.data + arg_obj->size, stdin_buf, stdin_len);
365 free(stdin_buf);
366 ret = send_callback_request(f, &query, result);
367 free(query.data);
368 return ret;
369 }
370
371 /**
372 * Open the audio file with highest score.
373 *
374 * \param afd Audio file data is returned here.
375 *
376 * This stores all information for streaming the "best" audio file
377 * in the \a afd structure.
378 *
379 * \return Positive on success, negative on errors.
380 *
381 * \sa close_audio_file(), open_and_update_audio_file().
382 */
383 int open_next_audio_file(struct audio_file_data *afd)
384 {
385 struct osl_row *aft_row;
386 int ret;
387 for (;;) {
388 ret = score_get_best(&aft_row, &afd->score);
389 if (ret < 0)
390 return ret;
391 ret = open_and_update_audio_file(aft_row, afd);
392 if (ret >= 0)
393 return ret;
394 }
395 }
396
397 /**
398 * Free all resources which were allocated by open_next_audio_file().
399 *
400 * \param afd The structure previously filled in by open_next_audio_file().
401 *
402 * \return The return value of the underlying call to para_munmap().
403 *
404 * \sa open_next_audio_file().
405 */
406 int close_audio_file(struct audio_file_data *afd)
407 {
408 free(afd->afhi.chunk_table);
409 return para_munmap(afd->map.data, afd->map.size);
410 }
411
412 #if 0
413 static void play_loop(enum play_mode current_play_mode)
414 {
415 int i, ret;
416 struct audio_file_data afd;
417
418 afd.current_play_mode = current_play_mode;
419 for (i = 0; i < 0; i++) {
420 ret = open_next_audio_file(&afd);
421 if (ret < 0) {
422 PARA_ERROR_LOG("failed to open next audio file: %d\n", ret);
423 return;
424 }
425 PARA_NOTICE_LOG("next audio file: %s, score: %li\n", afd.path, afd.score);
426 sleep(1);
427 close_audio_file(&afd);
428 }
429 }
430 #endif
431
432
433 static enum play_mode init_admissible_files(void)
434 {
435 int ret;
436 char *given_mood, *given_playlist;
437
438 given_mood = "mood_that_was_given_at_the_command_line";
439 given_playlist = "given_playlist";
440
441 if (given_mood) {
442 ret = mood_open(given_mood);
443 if (ret >= 0) {
444 if (given_playlist)
445 PARA_WARNING_LOG("ignoring playlist %s\n",
446 given_playlist);
447 return PLAY_MODE_MOOD;
448 }
449 }
450 if (given_playlist) {
451 ret = playlist_open(given_playlist);
452 if (ret >= 0)
453 return PLAY_MODE_PLAYLIST;
454 }
455 ret = mood_open(NULL); /* open first available mood */
456 if (ret >= 0)
457 return PLAY_MODE_MOOD;
458 mood_open(""); /* open dummy mood, always successful */
459 return PLAY_MODE_MOOD;
460 }
461
462 int command_socket;
463
464 static void setup_command_socket(void)
465 {
466 int ret;
467 char *socket_name = "/tmp/afs_command_socket";
468 struct sockaddr_un unix_addr;
469
470 unlink(socket_name);
471 ret = create_local_socket(socket_name, &unix_addr,
472 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
473 if (ret < 0)
474 exit(EXIT_FAILURE);
475 command_socket = ret;
476 if (listen(command_socket , 5) < 0) {
477 PARA_EMERG_LOG("%s", "can not listen on socket\n");
478 exit(EXIT_FAILURE);
479 }
480 PARA_INFO_LOG("listening on command socket %s (fd %d)\n", socket_name,
481 command_socket);
482 }
483
484 int server_socket;
485
486 void shed(void)
487 {
488 for (;;)
489 sleep(1);
490 }
491
492 __noreturn int afs_init(uint32_t cookie, int socket_fd)
493 {
494 int ret;
495 // void *shm_area;
496 enum play_mode current_play_mode;
497
498 server_socket = socket_fd;
499 socket_cookie = cookie;
500 PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n",
501 server_socket, (unsigned) cookie);
502 setup_command_socket();
503
504 ret = attribute_init(&afs_tables[TBLNUM_ATTRIBUTES]);
505 if (ret < 0)
506 goto attribute_init_error;
507 ret = moods_init(&afs_tables[TBLNUM_MOODS]);
508 if (ret < 0)
509 goto moods_init_error;
510 ret = playlists_init(&afs_tables[TBLNUM_PLAYLIST]);
511 if (ret < 0)
512 goto playlists_init_error;
513 ret = lyrics_init(&afs_tables[TBLNUM_LYRICS]);
514 if (ret < 0)
515 goto lyrics_init_error;
516 ret = images_init(&afs_tables[TBLNUM_IMAGES]);
517 if (ret < 0)
518 goto images_init_error;
519 ret = score_init(&afs_tables[TBLNUM_SCORES]);
520 if (ret < 0)
521 goto score_init_error;
522 ret = aft_init(&afs_tables[TBLNUM_AUDIO_FILES]);
523 if (ret < 0)
524 goto aft_init_error;
525
526 current_play_mode = init_admissible_files();
527 shed();
528
529 #if 0
530 ret = shm_new(sizeof(struct callback_data));
531 if (ret < 0)
532 return ret;
533 shmid = ret;
534 ret = shm_attach(shmid, ATTACH_RW, &shm_area);
535 if (ret < 0)
536 return ret;
537 shm_callback_data = shm_area;
538 ret = mutex_new();
539 if (ret < 0)
540 return ret;
541 callback_mutex = ret;
542 ret = mutex_new();
543 if (ret < 0)
544 return ret;
545 child_mutex = ret;
546 ret = mutex_new();
547 if (ret < 0)
548 return ret;
549 result_mutex = ret;
550 mutex_lock(result_mutex);
551 #endif
552 aft_init_error:
553 score_shutdown(OSL_MARK_CLEAN);
554 score_init_error:
555 images_shutdown(OSL_MARK_CLEAN);
556 images_init_error:
557 lyrics_shutdown(OSL_MARK_CLEAN);
558 lyrics_init_error:
559 playlists_shutdown(OSL_MARK_CLEAN);
560 playlists_init_error:
561 moods_shutdown(OSL_MARK_CLEAN);
562 moods_init_error:
563 attribute_shutdown(OSL_MARK_CLEAN);
564 attribute_init_error:
565 exit(EXIT_FAILURE);
566 }
567
568 static int create_all_tables(void)
569 {
570 int i, ret;
571
572 for (i = 0; i < NUM_AFS_TABLES; i++) {
573 struct table_info *ti = afs_tables + i;
574
575 if (ti->flags & TBLFLAG_SKIP_CREATE)
576 continue;
577 ret = osl_create_table(ti->desc);
578 if (ret < 0)
579 return ret;
580 }
581 return 1;
582 }
583
584 /* TODO load tables after init */
585 static int com_init(__a_unused int fd, int argc, const char **argv)
586 {
587 int i, j, ret;
588 if (argc == 1)
589 return create_all_tables();
590 for (i = 1; i < argc; i++) {
591 for (j = 0; j < NUM_AFS_TABLES; j++) {
592 struct table_info *ti = afs_tables + j;
593
594 if (ti->flags & TBLFLAG_SKIP_CREATE)
595 continue;
596 if (strcmp(argv[i], ti->desc->name))
597 continue;
598 PARA_NOTICE_LOG("creating table %s\n", argv[i]);
599 ret = osl_create_table(ti->desc);
600 if (ret < 0)
601 return ret;
602 break;
603 }
604 if (j == NUM_AFS_TABLES)
605 return -E_BAD_TABLE_NAME;
606 }
607 return 1;
608 }
609 /** Describes a command of para_server. */
610 struct command {
611 /** The name of the command. */
612 const char *name;
613 /** The handler function. */
614 int (*handler)(int fd, int argc, const char **argv);
615 };
616
617 static struct command cmd[] = {
618 {
619 .name = "add",
620 .handler = com_add,
621 },
622 {
623 .name = "addlyr",
624 .handler = com_addlyr,
625 },
626 {
627 .name = "addimg",
628 .handler = com_addimg,
629 },
630 {
631 .name = "addmood",
632 .handler = com_addmood,
633 },
634 {
635 .name = "addpl",
636 .handler = com_addpl,
637 },
638 {
639 .name = "catlyr",
640 .handler = com_catlyr,
641 },
642 {
643 .name = "catimg",
644 .handler = com_catimg,
645 },
646 {
647 .name = "mvimg",
648 .handler = com_mvimg,
649 },
650 {
651 .name = "mvlyr",
652 .handler = com_mvlyr,
653 },
654 {
655 .name = "mvmood",
656 .handler = com_mvmood,
657 },
658 {
659 .name = "mvpl",
660 .handler = com_mvpl,
661 },
662 {
663 .name = "catmood",
664 .handler = com_catmood,
665 },
666 {
667 .name = "catpl",
668 .handler = com_catpl,
669 },
670 {
671 .name = "rmatt",
672 .handler = com_rmatt,
673 },
674 {
675 .name = "init",
676 .handler = com_init,
677 },
678 {
679 .name = "lsatt",
680 .handler = com_lsatt,
681 },
682 {
683 .name = "ls",
684 .handler = com_afs_ls,
685 },
686 {
687 .name = "lslyr",
688 .handler = com_lslyr,
689 },
690 {
691 .name = "lsimg",
692 .handler = com_lsimg,
693 },
694 {
695 .name = "lsmood",
696 .handler = com_lsmood,
697 },
698 {
699 .name = "lspl",
700 .handler = com_lspl,
701 },
702 {
703 .name = "setatt",
704 .handler = com_setatt,
705 },
706 {
707 .name = "addatt",
708 .handler = com_addatt,
709 },
710 {
711 .name = "rm",
712 .handler = com_afs_rm,
713 },
714 {
715 .name = "rmlyr",
716 .handler = com_rmlyr,
717 },
718 {
719 .name = "rmimg",
720 .handler = com_rmimg,
721 },
722 {
723 .name = "rmmood",
724 .handler = com_rmmood,
725 },
726 {
727 .name = "rmpl",
728 .handler = com_rmpl,
729 },
730 {
731 .name = "touch",
732 .handler = com_touch,
733 },
734 {
735 .name = NULL,
736 }
737 };
738
739 static void call_callback(void)
740 {
741 struct osl_object query, result = {.data = NULL};
742 int ret, ret2;
743
744 shm_callback_data->result_shmid = -1; /* no result */
745 ret = shm_attach(shm_callback_data->query_shmid, ATTACH_RW,
746 &query.data);
747 if (ret < 0)
748 goto out;
749 query.size = shm_callback_data->query_size;
750 shm_callback_data->callback_ret = shm_callback_data->handler(&query,
751 &result);
752 if (result.data && result.size) {
753 void *sma;
754 ret = shm_new(result.size);
755 if (ret < 0)
756 goto detach_query;
757 shm_callback_data->result_shmid = ret;
758 shm_callback_data->result_size = result.size;
759 ret = shm_attach(shm_callback_data->result_shmid, ATTACH_RW, &sma);
760 if (ret < 0)
761 goto destroy_result;
762 memcpy(sma, result.data, result.size);
763 ret = shm_detach(sma);
764 if (ret < 0) {
765 PARA_ERROR_LOG("detach result failed\n");
766 goto destroy_result;
767 }
768 }
769 ret = 1;
770 goto detach_query;
771 destroy_result:
772 if (shm_destroy(shm_callback_data->result_shmid) < 0)
773 PARA_ERROR_LOG("destroy result failed\n");
774 shm_callback_data->result_shmid = -1;
775 detach_query:
776 free(result.data);
777 ret2 = shm_detach(query.data);
778 if (ret2 < 0) {
779 PARA_ERROR_LOG("detach query failed\n");
780 if (ret >= 0)
781 ret = ret2;
782 }
783 out:
784 if (ret < 0)
785 PARA_ERROR_LOG("sma error %d\n", ret);
786 shm_callback_data->sma_ret = ret;
787 shm_callback_data->handler = NULL;
788 mutex_unlock(result_mutex); /* wake up child */
789 }
790
791 static void afs_shutdown(enum osl_close_flags flags)
792 {
793 score_shutdown(flags);
794 attribute_shutdown(flags);
795 mood_close();
796 playlist_close();
797 moods_shutdown(flags);
798 playlists_shutdown(flags);
799 lyrics_shutdown(flags);
800 images_shutdown(flags);
801 aft_shutdown(flags);
802 }
803
804 #if 0
805 static int got_sigchld;
806 static void server_loop(int child_pid)
807 {
808 // int status;
809
810 PARA_DEBUG_LOG("server pid: %d, child pid: %d\n",
811 getpid(), child_pid);
812 for (;;) {
813 mutex_lock(callback_mutex);
814 if (shm_callback_data->handler)
815 call_callback();
816 mutex_unlock(callback_mutex);
817 usleep(100);
818 if (!got_sigchld)
819 continue;
820 mutex_destroy(result_mutex);
821 mutex_destroy(callback_mutex);
822 mutex_destroy(child_mutex);
823 afs_shutdown(OSL_MARK_CLEAN);
824 exit(EXIT_SUCCESS);
825 }
826 }
827
828 int main(int argc, const char **argv)
829 {
830 int i, ret = -E_AFS_SYNTAX;
831
832 signal(SIGUSR1, dummy);
833 signal(SIGCHLD, sigchld_handler);
834 if (argc < 2)
835 goto out;
836 ret = setup();
837 // ret = afs_init();
838 if (ret < 0) {
839 PARA_EMERG_LOG("afs_init returned %d\n", ret);
840 exit(EXIT_FAILURE);
841 }
842 ret = fork();
843 if (ret < 0) {
844 ret = -E_FORK;
845 goto out;
846 }
847 if (ret)
848 server_loop(ret);
849 for (i = 0; cmd[i].name; i++) {
850 if (strcmp(cmd[i].name, argv[1]))
851 continue;
852 ret = cmd[i].handler(1, argc - 1 , argv + 1);
853 goto out;
854
855 }
856 PARA_ERROR_LOG("unknown command: %s\n", argv[1]);
857 ret = -1;
858 out:
859 if (ret < 0)
860 PARA_ERROR_LOG("error %d\n", ret);
861 else
862 PARA_DEBUG_LOG("%s", "success\n");
863 afs_shutdown(0);
864 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
865 }
866 #endif