2 * Copyright (C) 2007 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file afs.c Paraslash's audio file selector. */
11 #include "server.cmdline.h"
18 #include <dirent.h> /* readdir() */
28 /** The osl tables used by afs. \sa blob.c. */
30 /** Contains audio file information. See aft.c. */
32 /** The table for the paraslash attributes. See attribute.c. */
35 * Paraslash's scoring system is based on Gaussian normal
36 * distributions, and the relevant data is stored in the rbtrees of an
37 * osl table containing only volatile columns. See score.c for
42 * A standard blob table containing the mood definitions. For details
46 /** A blob table containing lyrics on a per-song basis. */
48 /** Another blob table for images (for example album cover art). */
50 /** Yet another blob table for storing standard playlists. */
52 /** How many tables are in use? */
56 static struct afs_table afs_tables
[NUM_AFS_TABLES
] = {
57 [TBLNUM_AUDIO_FILES
] = {.init
= aft_init
},
58 [TBLNUM_ATTRIBUTES
] = {.init
= attribute_init
},
59 [TBLNUM_SCORES
] = {.init
= score_init
},
60 [TBLNUM_MOODS
] = {.init
= moods_init
},
61 [TBLNUM_LYRICS
] = {.init
= lyrics_init
},
62 [TBLNUM_IMAGES
] = {.init
= images_init
},
63 [TBLNUM_PLAYLIST
] = {.init
= playlists_init
},
67 /** The file descriptor for the local socket. */
70 * Value sent by the command handlers to identify themselves as
71 * children of the running para_server.
74 /** The associated task structure. */
78 extern struct misc_meta_data
*mmd
;
80 static int server_socket
;
81 static struct command_task command_task_struct
;
82 static struct signal_task signal_task_struct
;
84 static enum play_mode current_play_mode
;
85 static char *current_mop
; /* mode or playlist specifier. NULL means dummy mooe */
89 * A random number used to "authenticate" the connection.
91 * para_server picks this number by random before forking the afs process. The
92 * command handlers write this number together with the id of the shared memory
93 * area containing the query. This way, a malicious local user has to know this
94 * number to be able to cause the afs process to crash by sending fake queries.
96 extern uint32_t afs_socket_cookie
;
99 * Struct to let command handlers execute a callback in afs context.
101 * Commands that need to change the state of afs can't change the relevant data
102 * structures directly because commands are executed in a child process, i.e.
103 * they get their own virtual address space.
105 * This structure is used by \p send_callback_request() (executed from handler
106 * context) in order to let the afs process call the specified function. An
107 * instance of that structure is written to a shared memory area together with
108 * the arguments to the callback function. The identifier of the shared memory
109 * area is written to the command socket.
111 * The afs process accepts connections on the command socket and reads the
112 * shared memory id, attaches the corresponing area, calls the given handler to
113 * perform the desired action and to optionally compute a result.
115 * The result and a \p callback_result structure is then written to another
116 * shared memory area. The identifier for that area is written to the handler's
117 * command socket, so that the handler process can read the id, attach the
118 * shared memory area and use the result.
120 * \sa struct callback_result.
122 struct callback_query
{
123 /** The function to be called. */
124 callback_function
*handler
;
125 /** The number of bytes of the query */
130 * Structure embedded in the result of a callback.
132 * If the callback produced a result, an instance of that structure is embeeded
133 * into the shared memory area holding the result, mainly to let the command
134 * handler know the size of the result.
136 * \sa struct callback_query.
138 struct callback_result
{
139 /** The number of bytes of the result. */
144 * Ask the afs process to call a given function.
146 * \param f The function to be called.
147 * \param query Pointer to arbitrary data for the callback.
148 * \param result Callback result will be stored here.
150 * This function creates a shared memory area, copies the buffer pointed to by
151 * query to that area and notifies the afs process that \a f should be
154 * \return Negative, on errors, the return value of the callback function
157 * \sa send_option_arg_callback_request(), send_standard_callback_request().
159 int send_callback_request(callback_function
*f
, struct osl_object
*query
,
160 struct osl_object
*result
)
162 struct callback_query
*cq
;
163 struct callback_result
*cr
;
164 int ret
, fd
= -1, query_shmid
, result_shmid
;
165 void *query_shm
, *result_shm
;
166 char buf
[sizeof(afs_socket_cookie
) + sizeof(int)];
167 size_t query_shm_size
= sizeof(*cq
);
170 query_shm_size
+= query
->size
;
171 ret
= shm_new(query_shm_size
);
175 ret
= shm_attach(query_shmid
, ATTACH_RW
, &query_shm
);
180 cq
->query_size
= query_shm_size
- sizeof(*cq
);
183 memcpy(query_shm
+ sizeof(*cq
), query
->data
, query
->size
);
184 ret
= shm_detach(query_shm
);
188 *(uint32_t *) buf
= afs_socket_cookie
;
189 *(int *) (buf
+ sizeof(afs_socket_cookie
)) = query_shmid
;
191 ret
= create_remote_socket(conf
.afs_socket_arg
);
195 ret
= send_bin_buffer(fd
, buf
, sizeof(buf
));
198 ret
= recv_bin_buffer(fd
, buf
, sizeof(buf
));
201 if (ret
!= sizeof(int)) {
202 ret
= -E_AFS_SHORT_READ
;
209 ret
= shm_attach(result_shmid
, ATTACH_RO
, &result_shm
);
213 result
->size
= cr
->result_size
;
214 result
->data
= para_malloc(result
->size
);
215 memcpy(result
->data
, result_shm
+ sizeof(*cr
), result
->size
);
216 ret
= shm_detach(result_shm
);
218 PARA_ERROR_LOG("can not detach result\n");
220 PARA_ERROR_LOG("attach result failed: %d\n", ret
);
221 if (shm_destroy(result_shmid
) < 0)
222 PARA_ERROR_LOG("destroy result failed\n");
225 if (shm_destroy(query_shmid
) < 0)
226 PARA_ERROR_LOG("%s\n", "shm destroy error");
229 // PARA_DEBUG_LOG("callback_ret: %d\n", ret);
234 * Send a callback request passing an options structure and an argument vector.
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.
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.
247 * \sa send_standard_callback_request(), send_callback_request().
249 int send_option_arg_callback_request(struct osl_object
*options
,
250 int argc
, char * const * const argv
, callback_function
*f
,
251 struct osl_object
*result
)
255 struct osl_object query
= {.size
= options
? options
->size
: 0};
257 for (i
= 0; i
< argc
; i
++)
258 query
.size
+= strlen(argv
[i
]) + 1;
259 query
.data
= para_malloc(query
.size
);
262 memcpy(query
.data
, options
->data
, options
->size
);
265 for (i
= 0; i
< argc
; i
++) {
266 strcpy(p
, argv
[i
]); /* OK */
267 p
+= strlen(argv
[i
]) + 1;
269 ret
= send_callback_request(f
, &query
, result
);
275 * Send a callback request with an argument vector only.
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().
282 * This is similar to send_option_arg_callback_request(), but no options buffer
283 * is passed to the parent process.
285 * \return The return value of the underlying call to
286 * send_option_arg_callback_request().
288 int send_standard_callback_request(int argc
, char * const * const argv
,
289 callback_function
*f
, struct osl_object
*result
)
291 return send_option_arg_callback_request(NULL
, argc
, argv
, f
, result
);
294 static int action_if_pattern_matches(struct osl_row
*row
, void *data
)
296 struct pattern_match_data
*pmd
= data
;
297 struct osl_object name_obj
;
298 const char *p
, *name
;
299 int ret
= osl_get_object(pmd
->table
, row
, pmd
->match_col_num
, &name_obj
);
300 const char *pattern_txt
= (const char *)pmd
->patterns
.data
;
304 name
= (char *)name_obj
.data
;
305 if ((!name
|| !*name
) && (pmd
->pm_flags
& PM_SKIP_EMPTY_NAME
))
307 if (!pmd
->patterns
.size
&& (pmd
->pm_flags
& PM_NO_PATTERN_MATCHES_EVERYTHING
))
308 return pmd
->action(pmd
->table
, row
, name
, pmd
->data
);
309 for (p
= pattern_txt
; p
< pattern_txt
+ pmd
->patterns
.size
;
310 p
+= strlen(p
) + 1) {
311 ret
= fnmatch(p
, name
, pmd
->fnmatch_flags
);
312 if (ret
== FNM_NOMATCH
)
316 return pmd
->action(pmd
->table
, row
, name
, pmd
->data
);
322 * Execute the given function for each matching row.
324 * \param pmd Describes what to match and how.
326 * \return The return value of the underlying call to osl_rbtree_loop()
327 * or osl_rbtree_loop_reverse().
329 int for_each_matching_row(struct pattern_match_data
*pmd
)
331 if (pmd
->pm_flags
& PM_REVERSE_LOOP
)
332 return osl_rbtree_loop_reverse(pmd
->table
, pmd
->loop_col_num
, pmd
,
333 action_if_pattern_matches
);
334 return osl_rbtree_loop(pmd
->table
, pmd
->loop_col_num
, pmd
,
335 action_if_pattern_matches
);
339 * Compare two osl objects of string type.
341 * \param obj1 Pointer to the first object.
342 * \param obj2 Pointer to the second object.
344 * In any case, only \p MIN(obj1->size, obj2->size) characters of each string
345 * are taken into account.
347 * \return It returns an integer less than, equal to, or greater than zero if
348 * \a obj1 is found, respectively, to be less than, to match, or be greater than
351 * \sa strcmp(3), strncmp(3), osl_compare_func.
353 int string_compare(const struct osl_object
*obj1
, const struct osl_object
*obj2
)
355 const char *str1
= (const char *)obj1
->data
;
356 const char *str2
= (const char *)obj2
->data
;
357 return strncmp(str1
, str2
, PARA_MIN(obj1
->size
, obj2
->size
));
361 * write input from fd to dynamically allocated buffer,
362 * but maximal max_size byte.
364 static int fd2buf(int fd
, unsigned max_size
, struct osl_object
*obj
)
366 const size_t chunk_size
= 1024;
367 size_t size
= 2048, received
= 0;
369 char *buf
= para_malloc(size
);
372 ret
= recv_bin_buffer(fd
, buf
+ received
, chunk_size
);
376 if (received
+ chunk_size
>= size
) {
378 ret
= -E_INPUT_TOO_LARGE
;
381 buf
= para_realloc(buf
, size
);
385 obj
->size
= received
;
392 * Read data from a file descriptor, and send it to the afs process.
394 * \param fd File descriptor to read data from.
395 * \param arg_obj Pointer to the arguments to \a f.
396 * \param f The callback function.
397 * \param max_len Don't read more than that many bytes from stdin.
398 * \param result The result of the query is stored here.
400 * This function is used by commands that wish to let para_server store
401 * arbitrary data specified by the user (for instance the add_blob family of
402 * commands). First, at most \a max_len bytes are read from \a fd, the result
403 * is concatenated with the buffer given by \a arg_obj, and the combined buffer
404 * is made available to the parent process via shared memory.
406 * \return Negative on errors, the return value of the underlying call to
407 * send_callback_request() otherwise.
409 int stdin_command(int fd
, struct osl_object
*arg_obj
, callback_function
*f
,
410 unsigned max_len
, struct osl_object
*result
)
412 struct osl_object query
, stdin_obj
;
415 ret
= send_buffer(fd
, AWAITING_DATA_MSG
);
418 ret
= fd2buf(fd
, max_len
, &stdin_obj
);
421 query
.size
= arg_obj
->size
+ stdin_obj
.size
;
422 query
.data
= para_malloc(query
.size
);
423 memcpy(query
.data
, arg_obj
->data
, arg_obj
->size
);
424 memcpy((char *)query
.data
+ arg_obj
->size
, stdin_obj
.data
, stdin_obj
.size
);
425 free(stdin_obj
.data
);
426 ret
= send_callback_request(f
, &query
, result
);
431 static int pass_afd(int fd
, char *buf
, size_t size
)
433 struct msghdr msg
= {.msg_iov
= NULL
};
434 struct cmsghdr
*cmsg
;
445 msg
.msg_control
= control
;
446 msg
.msg_controllen
= sizeof(control
);
448 cmsg
= CMSG_FIRSTHDR(&msg
);
449 cmsg
->cmsg_level
= SOL_SOCKET
;
450 cmsg
->cmsg_type
= SCM_RIGHTS
;
451 cmsg
->cmsg_len
= CMSG_LEN(sizeof(int));
452 *(int *)CMSG_DATA(cmsg
) = fd
;
454 /* Sum of the length of all control messages in the buffer */
455 msg
.msg_controllen
= cmsg
->cmsg_len
;
456 PARA_DEBUG_LOG("passing %zu bytes and fd %d\n", size
, fd
);
457 ret
= sendmsg(server_socket
, &msg
, 0);
459 ret
= -ERRNO_TO_PARA_ERROR(errno
);
466 * Open the audio file with highest score.
468 * This stores all information for streaming the "best" audio file in a shared
469 * memory area. The id of that area and an open file descriptor for the next
470 * audio file are passed to the server process.
474 * \sa open_and_update_audio_file().
476 int open_next_audio_file(void)
478 struct osl_row
*aft_row
;
479 struct audio_file_data afd
;
484 PARA_NOTICE_LOG("getting next audio file\n");
485 ret
= score_get_best(&aft_row
, &score
);
487 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
488 goto no_admissible_files
;
490 ret
= open_and_update_audio_file(aft_row
, score
, &afd
);
492 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
493 ret
= score_delete(aft_row
);
495 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
496 goto no_admissible_files
;
501 if (!write_ok(server_socket
)) {
505 *(uint32_t *)buf
= NEXT_AUDIO_FILE
;
506 *(uint32_t *)(buf
+ 4) = (uint32_t)shmid
;
507 ret
= pass_afd(afd
.fd
, buf
, 8);
515 *(uint32_t *)buf
= NO_ADMISSIBLE_FILES
;
516 *(uint32_t *)(buf
+ 4) = (uint32_t)0;
517 return send_bin_buffer(server_socket
, buf
, 8);
520 /* Never fails if arg == NULL */
521 static int activate_mood_or_playlist(char *arg
, int *num_admissible
)
527 ret
= change_current_mood(NULL
); /* always successful */
528 mode
= PLAY_MODE_MOOD
;
530 if (!strncmp(arg
, "p/", 2)) {
531 ret
= playlist_open(arg
+ 2);
532 mode
= PLAY_MODE_PLAYLIST
;
533 } else if (!strncmp(arg
, "m/", 2)) {
534 ret
= change_current_mood(arg
+ 2);
535 mode
= PLAY_MODE_MOOD
;
537 return -E_AFS_SYNTAX
;
542 *num_admissible
= ret
;
543 current_play_mode
= mode
;
544 if (arg
!= current_mop
) {
547 current_mop
= para_strdup(arg
);
549 strncpy(mmd
->afs_mode_string
, arg
,
550 sizeof(mmd
->afs_mode_string
));
551 mmd
->afs_mode_string
[sizeof(mmd
->afs_mode_string
) - 1] = '\0';
555 strcpy(mmd
->afs_mode_string
, "dummy");
563 static int com_select_callback(const struct osl_object
*query
,
564 struct osl_object
*result
)
566 struct para_buffer pb
= {.buf
= NULL
};
567 char *arg
= query
->data
;
568 int num_admissible
, ret
;
570 ret
= clear_score_table();
573 if (current_play_mode
== PLAY_MODE_MOOD
)
574 close_current_mood();
577 ret
= activate_mood_or_playlist(arg
, &num_admissible
);
579 para_printf(&pb
, "%s\n", PARA_STRERROR(-ret
));
580 para_printf(&pb
, "switching back to %s\n", current_mop
?
581 current_mop
: "dummy");
582 ret
= activate_mood_or_playlist(current_mop
, &num_admissible
);
584 para_printf(&pb
, "failed, switching to dummy\n");
585 activate_mood_or_playlist(NULL
, &num_admissible
);
588 para_printf(&pb
, "activated %s (%d admissible files)\n", current_mop
?
589 current_mop
: "dummy mood", num_admissible
);
590 result
->data
= pb
.buf
;
591 result
->size
= pb
.size
;
595 int com_select(int fd
, int argc
, char * const * const argv
)
598 struct osl_object query
, result
;
601 return -E_AFS_SYNTAX
;
602 query
.data
= argv
[1];
603 query
.size
= strlen(argv
[1]) + 1;
604 ret
= send_callback_request(com_select_callback
, &query
,
606 if (ret
> 0 && result
.data
&& result
.size
) {
607 ret
= send_va_buffer(fd
, "%s", (char *)result
.data
);
613 static void init_admissible_files(char *arg
)
615 if (activate_mood_or_playlist(arg
, NULL
) < 0)
616 activate_mood_or_playlist(NULL
, NULL
); /* always successful */
619 static int setup_command_socket_or_die(void)
622 char *socket_name
= conf
.afs_socket_arg
;
623 struct sockaddr_un unix_addr
;
626 ret
= create_local_socket(socket_name
, &unix_addr
,
627 S_IRUSR
| S_IWUSR
| S_IRGRP
| S_IWGRP
| S_IWOTH
);
629 PARA_EMERG_LOG("%s: %s\n", PARA_STRERROR(-ret
), socket_name
);
633 if (listen(socket_fd
, 5) < 0) {
634 PARA_EMERG_LOG("can not listen on socket\n");
637 ret
= mark_fd_nonblocking(socket_fd
);
642 PARA_INFO_LOG("listening on socket %s (fd %d)\n", socket_name
, ret
);
646 static void close_afs_tables(void)
649 PARA_NOTICE_LOG("closing afs_tables\n");
650 for (i
= 0; i
< NUM_AFS_TABLES
; i
++)
651 afs_tables
[i
].close();
654 static char *database_dir
;
656 static void get_database_dir(void)
659 if (conf
.afs_database_dir_given
)
660 database_dir
= para_strdup(conf
.afs_database_dir_arg
);
662 char *home
= para_homedir();
663 database_dir
= make_message(
664 "%s/.paraslash/afs_database", home
);
668 PARA_INFO_LOG("afs_database dir %s\n", database_dir
);
671 static int make_database_dir(void)
676 ret
= para_mkdir(database_dir
, 0777);
677 if (ret
>= 0 || is_errno(-ret
, EEXIST
))
682 static int open_afs_tables(void)
687 PARA_NOTICE_LOG("opening %u osl tables in %s\n", NUM_AFS_TABLES
,
689 for (i
= 0; i
< NUM_AFS_TABLES
; i
++) {
690 ret
= afs_tables
[i
].open(database_dir
);
693 PARA_ERROR_LOG("%s init: %s\n", afs_tables
[i
].name
,
694 PARA_STRERROR(-ret
));
700 afs_tables
[--i
].close();
704 static void unregister_tasks(void)
706 unregister_task(&command_task_struct
.task
);
707 unregister_task(&signal_task_struct
.task
);
710 static void signal_pre_select(struct sched
*s
, struct task
*t
)
712 struct signal_task
*st
= t
->private_data
;
714 para_fd_set(st
->fd
, &s
->rfds
, &s
->max_fileno
);
717 static void signal_post_select(struct sched
*s
, struct task
*t
)
719 struct signal_task
*st
= t
->private_data
;
720 t
->ret
= -E_AFS_PARENT_DIED
;
724 if (!FD_ISSET(st
->fd
, &s
->rfds
))
726 st
->signum
= para_next_signal();
728 if (st
->signum
== SIGUSR1
)
729 return; /* ignore SIGUSR1 */
730 if (st
->signum
== SIGHUP
) {
732 t
->ret
= open_afs_tables();
735 init_admissible_files(current_mop
);
738 t
->ret
= -E_AFS_SIGNAL
;
740 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
744 static void register_signal_task(void)
746 struct signal_task
*st
= &signal_task_struct
;
747 st
->fd
= para_signal_init();
748 PARA_INFO_LOG("signal pipe: fd %d\n", st
->fd
);
749 para_install_sighandler(SIGINT
);
750 para_install_sighandler(SIGTERM
);
751 para_install_sighandler(SIGPIPE
);
752 para_install_sighandler(SIGHUP
);
754 st
->task
.pre_select
= signal_pre_select
;
755 st
->task
.post_select
= signal_post_select
;
756 st
->task
.private_data
= st
;
757 sprintf(st
->task
.status
, "signal task");
758 register_task(&st
->task
);
761 static struct list_head afs_client_list
;
763 /** Describes on connected afs client. */
765 /** Position in the afs client list. */
766 struct list_head node
;
767 /** The socket file descriptor for this client. */
769 /** The time the client connected. */
770 struct timeval connect_time
;
773 static void command_pre_select(struct sched
*s
, struct task
*t
)
775 struct command_task
*ct
= t
->private_data
;
776 struct afs_client
*client
;
778 para_fd_set(server_socket
, &s
->rfds
, &s
->max_fileno
);
779 para_fd_set(ct
->fd
, &s
->rfds
, &s
->max_fileno
);
780 list_for_each_entry(client
, &afs_client_list
, node
)
781 para_fd_set(client
->fd
, &s
->rfds
, &s
->max_fileno
);
786 * On errors, negative value is written to fd.
787 * On success: If query produced a result, the result_shmid is written to fd.
788 * Otherwise, zero is written.
790 static int call_callback(int fd
, int query_shmid
)
792 void *query_shm
, *result_shm
;
793 struct callback_query
*cq
;
794 struct callback_result
*cr
;
795 struct osl_object query
, result
= {.data
= NULL
};
796 int result_shmid
= -1, ret
, ret2
;
798 ret
= shm_attach(query_shmid
, ATTACH_RW
, &query_shm
);
802 query
.data
= (char *)query_shm
+ sizeof(*cq
);
803 query
.size
= cq
->query_size
;
804 ret
= cq
->handler(&query
, &result
);
805 ret2
= shm_detach(query_shm
);
806 if (ret2
< 0 && ret
>= 0)
811 if (!result
.data
|| !result
.size
)
813 ret
= shm_new(result
.size
+ sizeof(struct callback_result
));
817 ret
= shm_attach(result_shmid
, ATTACH_RW
, &result_shm
);
821 cr
->result_size
= result
.size
;
822 memcpy(result_shm
+ sizeof(*cr
), result
.data
, result
.size
);
823 ret
= shm_detach(result_shm
);
829 ret2
= send_bin_buffer(fd
, (char *)&ret
, sizeof(int));
830 if (ret
< 0 || ret2
< 0) {
831 if (result_shmid
>= 0)
832 if (shm_destroy(result_shmid
) < 0)
833 PARA_ERROR_LOG("destroy result failed\n");
840 static void execute_server_command(void)
843 int ret
= recv_bin_buffer(server_socket
, buf
, sizeof(buf
) - 1);
847 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret
));
851 PARA_DEBUG_LOG("received: %s\n", buf
);
852 if (!strcmp(buf
, "new")) {
853 ret
= open_next_audio_file();
855 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret
));
860 PARA_ERROR_LOG("unknown command\n");
864 static void execute_afs_command(int fd
, uint32_t expected_cookie
)
868 char buf
[sizeof(cookie
) + sizeof(query_shmid
)];
869 int ret
= recv_bin_buffer(fd
, buf
, sizeof(buf
));
872 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-ret
));
875 if (ret
!= sizeof(buf
)) {
876 PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
877 ret
, (long unsigned) sizeof(buf
));
880 cookie
= *(uint32_t *)buf
;
881 if (cookie
!= expected_cookie
) {
882 PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n",
883 (unsigned)cookie
, (unsigned)expected_cookie
);
886 query_shmid
= *(int *)(buf
+ sizeof(cookie
));
887 if (query_shmid
< 0) {
888 PARA_WARNING_LOG("received invalid query shmid %d)\n",
892 /* Ignore return value: Errors might be OK here. */
893 call_callback(fd
, query_shmid
);
896 /** Shutdown connection if query has not arrived until this many seconds. */
897 #define AFS_CLIENT_TIMEOUT 3
899 static void command_post_select(struct sched
*s
, struct task
*t
)
901 struct command_task
*ct
= t
->private_data
;
902 struct sockaddr_un unix_addr
;
903 struct afs_client
*client
, *tmp
;
905 if (FD_ISSET(server_socket
, &s
->rfds
))
906 execute_server_command();
908 /* Check the list of connected clients. */
909 list_for_each_entry_safe(client
, tmp
, &afs_client_list
, node
) {
910 if (FD_ISSET(client
->fd
, &s
->rfds
))
911 execute_afs_command(client
->fd
, ct
->cookie
);
912 else { /* prevent bogus connection flooding */
914 tv_diff(now
, &client
->connect_time
, &diff
);
915 if (diff
.tv_sec
< AFS_CLIENT_TIMEOUT
)
917 PARA_WARNING_LOG("connection timeout\n");
920 list_del(&client
->node
);
923 /* Accept connections on the local socket. */
924 if (!FD_ISSET(ct
->fd
, &s
->rfds
))
926 t
->ret
= para_accept(ct
->fd
, &unix_addr
, sizeof(unix_addr
));
928 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
932 t
->ret
= mark_fd_nonblocking(fd
);
934 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
938 client
= para_malloc(sizeof(*client
));
940 client
->connect_time
= *now
;
941 para_list_add(&client
->node
, &afs_client_list
);
946 static void register_command_task(uint32_t cookie
)
948 struct command_task
*ct
= &command_task_struct
;
949 ct
->fd
= setup_command_socket_or_die();
952 ct
->task
.pre_select
= command_pre_select
;
953 ct
->task
.post_select
= command_post_select
;
954 ct
->task
.private_data
= ct
;
955 sprintf(ct
->task
.status
, "command task");
956 register_task(&ct
->task
);
959 static void register_tasks(uint32_t cookie
)
961 register_signal_task();
962 register_command_task(cookie
);
966 * Initialize the audio file selector process.
968 * \param cookie The value used for "authentication".
969 * \param socket_fd File descriptor used for communication with the server.
971 __noreturn
void afs_init(uint32_t cookie
, int socket_fd
)
976 INIT_LIST_HEAD(&afs_client_list
);
977 for (i
= 0; i
< NUM_AFS_TABLES
; i
++)
978 afs_tables
[i
].init(&afs_tables
[i
]);
979 ret
= open_afs_tables();
982 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret
));
985 server_socket
= socket_fd
;
986 ret
= mark_fd_nonblocking(server_socket
);
989 PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n",
990 server_socket
, (unsigned) cookie
);
991 init_admissible_files(conf
.afs_initial_mode_arg
);
992 register_tasks(cookie
);
993 s
.default_timeout
.tv_sec
= 0;
994 s
.default_timeout
.tv_usec
= 999 * 1000;
997 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret
));
1002 static int create_tables_callback(const struct osl_object
*query
,
1003 __a_unused
struct osl_object
*result
)
1005 uint32_t table_mask
= *(uint32_t *)query
->data
;
1009 for (i
= 0; i
< NUM_AFS_TABLES
; i
++) {
1010 struct afs_table
*t
= &afs_tables
[i
];
1012 if (!(table_mask
& (1 << i
)))
1016 ret
= t
->create(database_dir
);
1020 ret
= open_afs_tables();
1021 return ret
< 0? ret
: 0;
1024 int com_init(int fd
, int argc
, char * const * const argv
)
1027 uint32_t table_mask
= (1 << (NUM_AFS_TABLES
+ 1)) - 1;
1028 struct osl_object query
= {.data
= &table_mask
,
1029 .size
= sizeof(table_mask
)};
1031 ret
= make_database_dir();
1036 for (i
= 1; i
< argc
; i
++) {
1037 for (j
= 0; j
< NUM_AFS_TABLES
; j
++) {
1038 struct afs_table
*t
= &afs_tables
[j
];
1040 if (strcmp(argv
[i
], t
->name
))
1042 table_mask
|= (1 << j
);
1045 if (j
== NUM_AFS_TABLES
)
1046 return -E_BAD_TABLE_NAME
;
1049 ret
= send_callback_request(create_tables_callback
, &query
, NULL
);
1052 return send_va_buffer(fd
, "successfully created afs table(s)\n");
1056 * Flags for the check command.
1060 enum com_check_flags
{
1061 /** Check the audio file table. */
1063 /** Check the mood table. */
1065 /** Check the playlist table. */
1069 int com_check(int fd
, int argc
, char * const * const argv
)
1073 struct osl_object result
;
1075 for (i
= 1; i
< argc
; i
++) {
1076 const char *arg
= argv
[i
];
1079 if (!strcmp(arg
, "--")) {
1083 if (!strcmp(arg
, "-a")) {
1087 if (!strcmp(arg
, "-p")) {
1088 flags
|= CHECK_PLAYLISTS
;
1091 if (!strcmp(arg
, "-m")) {
1092 flags
|= CHECK_MOODS
;
1095 return -E_AFS_SYNTAX
;
1098 return -E_AFS_SYNTAX
;
1101 if (flags
& CHECK_AFT
) {
1102 ret
= send_callback_request(aft_check_callback
, NULL
, &result
);
1106 ret
= send_buffer(fd
, (char *) result
.data
);
1112 if (flags
& CHECK_PLAYLISTS
) {
1113 ret
= send_callback_request(playlist_check_callback
, NULL
, &result
);
1117 ret
= send_buffer(fd
, (char *) result
.data
);
1123 if (flags
& CHECK_MOODS
) {
1124 ret
= send_callback_request(mood_check_callback
, NULL
, &result
);
1128 ret
= send_buffer(fd
, (char *) result
.data
);
1137 void afs_event(enum afs_events event
, struct para_buffer
*pb
,
1142 for (i
= 0; i
< NUM_AFS_TABLES
; i
++) {
1143 struct afs_table
*t
= &afs_tables
[i
];
1144 if (!t
->event_handler
)
1146 ret
= t
->event_handler(event
, pb
, data
);
1148 PARA_CRIT_LOG("%s\n", PARA_STRERROR(-ret
));
1152 int images_event_handler(__a_unused
enum afs_events event
,
1153 __a_unused
struct para_buffer
*pb
, __a_unused
void *data
)
1158 int lyrics_event_handler(__a_unused
enum afs_events event
,
1159 __a_unused
struct para_buffer
*pb
, __a_unused
void *data
)