make gengetopt-2.20 happy
[paraslash.git] / audiod_command.c
1 /*
2 * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file audiod_command.c commands for para_audiod */
8
9 #include "para.h"
10
11 #include "audiod.cmdline.h"
12 #include "list.h"
13 #include "close_on_fork.h"
14 #include "sched.h"
15 #include "filter.h"
16 #include "grab_client.cmdline.h"
17 #include "grab_client.h"
18
19 #include "error.h"
20 #include "audiod.h"
21 #include "net.h"
22 #include "daemon.h"
23 #include "string.h"
24 #include "fd.h"
25 #include "audiod_command_list.h"
26
27 /** iterate over the array of all audiod commands */
28 #define FOR_EACH_COMMAND(c) for (c = 0; audiod_cmds[c].name; c++)
29
30 static int client_write(int fd, const char *buf)
31 {
32 size_t len = strlen(buf);
33 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
34 }
35
36 static char *get_time_string(struct timeval *newest_stime)
37 {
38 struct timeval diff, adj_stream_start, tmp;
39 int total = 0, use_server_time = 1,
40 length_seconds = stat_task->length_seconds;
41
42 if (!stat_task->playing) {
43 if (length_seconds)
44 return NULL;
45 return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
46 }
47 if (audiod_status == AUDIOD_OFF)
48 goto out;
49 if (stat_task->sa_time_diff_sign > 0)
50 tv_diff(&stat_task->server_stream_start, &stat_task->sa_time_diff,
51 &adj_stream_start);
52 else
53 tv_add(&stat_task->server_stream_start, &stat_task->sa_time_diff,
54 &adj_stream_start);
55 tmp = adj_stream_start;
56 if (newest_stime && audiod_status == AUDIOD_ON) {
57 tv_diff(newest_stime, &adj_stream_start, &diff);
58 if (tv2ms(&diff) < 5000) {
59 tmp = *newest_stime;
60 use_server_time = 0;
61 }
62 }
63 tv_diff(now, &tmp, &diff);
64 total = diff.tv_sec + stat_task->offset_seconds;
65 if (total > length_seconds)
66 total = length_seconds;
67 if (total < 0)
68 total = 0;
69 out:
70 return make_message(
71 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
72 status_item_list[SI_PLAY_TIME],
73 use_server_time? "~" : "",
74 total / 60,
75 total % 60,
76 (length_seconds - total) / 60,
77 (length_seconds - total) % 60,
78 length_seconds? (total * 100 + length_seconds / 2) /
79 length_seconds : 0,
80 length_seconds / 60,
81 length_seconds % 60
82 );
83 }
84
85 __malloc static char *audiod_status_string(void)
86 {
87 const char *status = (audiod_status == AUDIOD_ON)?
88 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
89 return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
90 }
91
92 static struct timeval *wstime(void)
93 {
94 int i;
95 struct timeval *max = NULL;
96 FOR_EACH_SLOT(i) {
97 struct slot_info *s = &slot[i];
98 if (!s->wng)
99 continue;
100 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
101 continue;
102 max = &s->wstime;
103 }
104 return max;
105 }
106 __malloc static char *decoder_flags(void)
107 {
108 int i;
109 char flags[MAX_STREAM_SLOTS + 1];
110
111 FOR_EACH_SLOT(i) {
112 struct slot_info *s = &slot[i];
113 char flag = '0';
114 if (s->receiver_node)
115 flag += 1;
116 if (s->wng)
117 flag += 2;
118 flags[i] = flag;
119 }
120 flags[MAX_STREAM_SLOTS] = '\0';
121 return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
122 flags);
123 }
124
125 static int dump_commands(int fd)
126 {
127 char *buf = para_strdup(""), *tmp = NULL;
128 int i;
129 ssize_t ret;
130
131 FOR_EACH_COMMAND(i) {
132 tmp = make_message("%s%s\t%s\n", buf, audiod_cmds[i].name,
133 audiod_cmds[i].description);
134 free(buf);
135 buf = tmp;
136 }
137 ret = client_write(fd, buf);
138 free(buf);
139 return ret;
140 }
141
142 /*
143 * command handlers don't close their fd on errors (ret < 0) so that
144 * its caller can send an error message. Otherwise (ret >= 0) it's up
145 * to each individual command to close the fd if necessary.
146 */
147
148 int com_help(int fd, int argc, char **argv)
149 {
150 int i, ret;
151 char *buf;
152 const char *dflt = "No such command. Available commands:\n";
153
154 if (argc < 2) {
155 ret = dump_commands(fd);
156 goto out;
157 }
158 FOR_EACH_COMMAND(i) {
159 if (strcmp(audiod_cmds[i].name, argv[1]))
160 continue;
161 buf = make_message(
162 "NAME\n\t%s -- %s\n"
163 "SYNOPSIS\n\tpara_audioc %s\n"
164 "DESCRIPTION\n%s\n",
165 argv[1],
166 audiod_cmds[i].description,
167 audiod_cmds[i].usage,
168 audiod_cmds[i].help
169 );
170 ret = client_write(fd, buf);
171 free(buf);
172 goto out;
173 }
174 ret = client_write(fd, dflt);
175 if (ret > 0)
176 ret = dump_commands(fd);
177 out:
178 if (ret >= 0)
179 close(fd);
180 return ret;
181 }
182
183 int com_tasks(int fd, __a_unused int argc, __a_unused char **argv)
184 {
185 char *tl = get_task_list();
186 int ret = 1;
187 if (tl)
188 ret = client_write(fd, tl);
189 free(tl);
190 if (ret > 0)
191 close(fd);
192 return ret;
193 }
194
195 int com_kill(int fd, int argc, char **argv)
196 {
197 int i, ret = 1;
198 if (argc < 2)
199 return -E_AUDIOD_SYNTAX;
200 for (i = 1; i < argc; i++) {
201 ret = kill_task(argv[i]);
202 if (ret < 0)
203 break;
204 }
205 if (ret > 0)
206 close(fd);
207 return ret;
208 }
209
210 int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
211 {
212 int i, ret;
213 char *buf = NULL;
214 long unsigned mask = ~0LU;
215
216 if (argc > 1) {
217 mask = 0;
218 for (i = 1; i < argc; i++) {
219 ret = stat_item_valid(argv[i]);
220 if (ret < 0)
221 return ret;
222 mask |= (1 << ret);
223 }
224 }
225 PARA_INFO_LOG("mask: 0x%lx\n", mask);
226 if (mask & (1 << SI_PLAY_TIME)) {
227 struct timeval *t = wstime();
228 char *ts = get_time_string(t);
229 if (ts) {
230 ret = client_write(fd, ts);
231 if (ret < 0)
232 goto out;
233 free(ts);
234 }
235 }
236 if (mask & (1 << SI_AUDIOD_UPTIME)) {
237 char *tmp, *us = uptime_str();
238 tmp = make_message("%s:%s\n",
239 status_item_list[SI_AUDIOD_UPTIME], us);
240 free(us);
241 ret = client_write(fd, tmp);
242 if (ret < 0)
243 goto out;
244 free(tmp);
245 }
246 if (mask & (1 << SI_AUDIOD_STATUS)) {
247 char *s = audiod_status_string();
248 ret = client_write(fd, s);
249 if (ret < 0)
250 goto out;
251 free(s);
252 }
253 if (mask & (1 << SI_DECODER_FLAGS)) {
254 char *df =decoder_flags();
255 ret = client_write(fd, df);
256 if (ret < 0)
257 goto out;
258 free(df);
259 }
260
261 for (i = 0; i < NUM_STAT_ITEMS; i++) {
262 char *tmp, *v;
263 if (!((1 << i) & mask))
264 continue;
265 v = stat_task->stat_item_values[i];
266 tmp = make_message("%s%s%s", buf? buf: "",
267 v? v : "", v? "\n" : "");
268 free(buf);
269 buf = tmp;
270 }
271 ret = client_write(fd, buf);
272 out:
273 if (ret > 0)
274 ret = stat_client_add(fd, mask);
275 free(buf);
276 return ret;
277 }
278
279 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
280 {
281 struct filter_node *fn;
282 int i, j;
283
284 FOR_EACH_SLOT(i) {
285 struct slot_info *s = &slot[i];
286 if (s->format < 0 || !s->fc)
287 continue;
288 if (slot_num >= 0 && slot_num != i)
289 continue;
290 if (format >= 0 && s->format != format)
291 continue;
292 if (num_filters(i) < filternum)
293 continue;
294 /* success */
295 j = 1;
296 list_for_each_entry(fn, &s->fc->filters, node)
297 if (filternum <= 0 || j++ == filternum)
298 break;
299 return fn;
300 }
301 return NULL;
302 }
303
304 int com_grab(int fd, char *cmdline)
305 {
306 struct grab_client *gc;
307 struct filter_node *fn;
308 int i, err;
309 char *msg;
310
311 gc = grab_client_new(fd, cmdline, &err);
312 if (!gc)
313 goto err_out;
314 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
315 if (fn)
316 activate_grab_client(gc, fn);
317 return 1;
318 err_out:
319 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
320 return err;
321 if (err == -E_GC_HELP_GIVEN) {
322 msg = make_message("%s\n\n", grab_client_args_info_usage);
323 for (i = 0; grab_client_args_info_help[i]; i++) {
324 char *tmp = make_message("%s%s\n", msg,
325 grab_client_args_info_help[i]);
326 free(msg);
327 msg = tmp;
328 }
329 } else
330 msg = make_message("%s %s\n",
331 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
332 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
333 err = client_write(fd, msg);
334 free(msg);
335 if (err < 0)
336 return err;
337 close(fd);
338 return 1;
339 }
340
341 __noreturn int com_term(int fd, __a_unused int argc, __a_unused char **argv)
342 {
343 close(fd);
344 clean_exit(EXIT_SUCCESS, "terminating on user request");
345 }
346
347 int com_on(int fd, __a_unused int argc, __a_unused char **argv)
348 {
349 audiod_status = AUDIOD_ON;
350 close(fd);
351 return 1;
352 }
353
354 int com_off(int fd, __a_unused int argc, __a_unused char **argv)
355 {
356 audiod_status = AUDIOD_OFF;
357 close(fd);
358 return 1;
359 }
360
361 int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
362 {
363 audiod_status = AUDIOD_STANDBY;
364 close(fd);
365 return 1;
366 }
367
368 int com_cycle(int fd, int argc, char **argv)
369 {
370 switch (audiod_status) {
371 case AUDIOD_ON:
372 return com_sb(fd, argc, argv);
373 break;
374 case AUDIOD_OFF:
375 return com_on(fd, argc, argv);
376 break;
377 case AUDIOD_STANDBY:
378 return com_off(fd, argc, argv);
379 break;
380 }
381 close(fd);
382 return 1;
383 }
384
385 static int check_perms(uid_t uid)
386 {
387 int i;
388
389 if (!conf.user_allow_given)
390 return 1;
391 for (i = 0; i < conf.user_allow_given; i++)
392 if (uid == conf.user_allow_arg[i])
393 return 1;
394 return -E_UCRED_PERM;
395 }
396
397 /**
398 * handle arriving connections on the local socket
399 *
400 * \param accept_fd the fd to call accept() on
401 *
402 * This is called whenever para_audiod's main task detects an incoming
403 * connection by the readability of \a accept_fd. This function reads the
404 * command sent by the peer, checks the connecting user's permissions by using
405 * unix socket credentials (if supported by the OS) and calls the corresponding
406 * command handler if permissions are OK.
407 *
408 * \return positive on success, negative on errors
409 *
410 * \sa para_accept(), recv_cred_buffer()
411 * */
412 int handle_connect(int accept_fd)
413 {
414 int i, argc, ret, clifd = -1;
415 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
416 struct sockaddr_un unix_addr;
417 uid_t uid;
418
419 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
420 if (ret < 0)
421 goto out;
422 clifd = ret;
423 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
424 if (ret < 0)
425 goto out;
426 uid = ret;
427 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
428 ret = check_perms(uid);
429 if (ret < 0)
430 goto out;
431 ret = -E_INVALID_AUDIOD_CMD;
432 cmd = para_strdup(buf);
433 p = strchr(cmd, '\n');
434 if (!p)
435 p = "";
436 else {
437 *p = '\0';
438 p++;
439 }
440 for (i = 0; audiod_cmds[i].name; i++) {
441 int j;
442 if (strcmp(audiod_cmds[i].name, cmd))
443 continue;
444 if (audiod_cmds[i].handler) {
445 argc = split_args(buf, &argv, "\n");
446 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
447 ret = audiod_cmds[i].handler(clifd, argc, argv);
448 goto out;
449 }
450 for (j = 0; p[j]; j++)
451 if (p[j] == '\n')
452 p[j] = ' ';
453 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
454 ret = audiod_cmds[i].line_handler(clifd, p);
455 goto out;
456 }
457 ret = -E_INVALID_AUDIOD_CMD;
458 out:
459 free(cmd);
460 free(buf);
461 free(argv);
462 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
463 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
464 client_write(clifd, tmp);
465 free(tmp);
466 close(clifd);
467 }
468 return ret;
469 }
470 /**
471 * send the current audiod status to all connected stat clients
472 */
473 void audiod_status_dump(void)
474 {
475 struct timeval *t = wstime();
476 char *old, *new, *tmp;
477
478 old = stat_task->stat_item_values[SI_PLAY_TIME];
479 new = get_time_string(t);
480 if (new) {
481 if (!old || strcmp(old, new)) {
482 free(old);
483 stat_client_write(new, SI_PLAY_TIME);
484 stat_task->stat_item_values[SI_PLAY_TIME] = new;
485 } else
486 free(new);
487 }
488
489 new = uptime_str();
490 old = stat_task->stat_item_values[SI_AUDIOD_UPTIME];
491 if (!old || strcmp(old, new)) {
492 free(old);
493 tmp = make_message("%s:%s\n",
494 status_item_list[SI_AUDIOD_UPTIME], new);
495 stat_client_write(tmp, SI_AUDIOD_UPTIME);
496 free(tmp);
497 stat_task->stat_item_values[SI_AUDIOD_UPTIME] = new;
498 } else
499 free(new);
500
501 old = stat_task->stat_item_values[SI_AUDIOD_STATUS];
502 new = audiod_status_string();
503 if (!old || strcmp(old, new)) {
504 free(old);
505 stat_client_write(new, SI_AUDIOD_STATUS);
506 stat_task->stat_item_values[SI_AUDIOD_STATUS] = new;
507 } else
508 free(new);
509
510 old = stat_task->stat_item_values[SI_DECODER_FLAGS];
511 new = decoder_flags();
512 if (!old || strcmp(old, new)) {
513 free(old);
514 stat_client_write(new, SI_DECODER_FLAGS);
515 stat_task->stat_item_values[SI_DECODER_FLAGS] = new;
516 } else
517 free(new);
518 }
519
520 /**
521 * send empty status list
522 *
523 * Send to each connected client the full status item list
524 * with empty values.
525 */
526 void dump_empty_status(void)
527 {
528 int i;
529
530 FOR_EACH_STAT_ITEM(i) {
531 char *tmp = make_message("%s:\n", status_item_list[i]);
532 stat_client_write(tmp, i);
533 free(tmp);
534 free(stat_task->stat_item_values[i]);
535 stat_task->stat_item_values[i] = NULL;
536 }
537 }