2 * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file audiod_command.c commands for para_audiod */
13 #include "audiod.cmdline.h"
15 #include "close_on_fork.h"
19 #include "grab_client.cmdline.h"
20 #include "grab_client.h"
28 #include "audiod_command_list.h"
30 extern char *stat_item_values[NUM_STAT_ITEMS];
33 /** iterate over the array of all audiod commands */
34 #define FOR_EACH_COMMAND(c) for (c = 0; audiod_cmds[c].name; c++)
36 static int client_write(int fd, const char *buf)
38 size_t len = strlen(buf);
39 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
42 __malloc static char *audiod_status_string(void)
44 const char *status = (audiod_status == AUDIOD_ON)?
45 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
46 return make_message("%s: %s\n", status_item_list[SI_AUDIOD_STATUS], status);
49 static struct timeval *wstime(void)
52 struct timeval *max = NULL;
54 struct slot_info *s = &slot[i];
57 if (max && tv_diff(&s->wstime, max, NULL) <= 0)
63 __malloc static char *decoder_flags(void)
66 char flags[MAX_STREAM_SLOTS + 1];
69 struct slot_info *s = &slot[i];
77 flags[MAX_STREAM_SLOTS] = '\0';
78 return make_message("%s: %s\n", status_item_list[SI_DECODER_FLAGS],
82 static int dump_commands(int fd)
84 char *buf = para_strdup(""), *tmp = NULL;
89 tmp = make_message("%s%s\t%s\n", buf, audiod_cmds[i].name,
90 audiod_cmds[i].description);
94 ret = client_write(fd, buf);
100 * command handlers don't close their fd on errors (ret < 0) so that
101 * its caller can send an error message. Otherwise (ret >= 0) it's up
102 * to each individual command to close the fd if necessary.
105 int com_help(int fd, int argc, char **argv)
109 const char *dflt = "No such command. Available commands:\n";
112 ret = dump_commands(fd);
115 FOR_EACH_COMMAND(i) {
116 if (strcmp(audiod_cmds[i].name, argv[1]))
120 "SYNOPSIS\n\tpara_audioc %s\n"
123 audiod_cmds[i].description,
124 audiod_cmds[i].usage,
127 ret = client_write(fd, buf);
131 ret = client_write(fd, dflt);
133 ret = dump_commands(fd);
140 int com_tasks(int fd, __a_unused int argc, __a_unused char **argv)
142 char *tl = get_task_list();
145 ret = client_write(fd, tl);
152 int com_kill(int fd, int argc, char **argv)
156 return -E_AUDIOD_SYNTAX;
157 for (i = 1; i < argc; i++) {
158 ret = kill_task(argv[i]);
167 int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
171 long unsigned mask = ~0LU;
175 for (i = 1; i < argc; i++) {
176 ret = stat_item_valid(argv[i]);
182 PARA_INFO_LOG("mask: 0x%lx\n", mask);
183 if (mask & (1 << SI_PLAY_TIME)) {
184 struct timeval *t = wstime();
185 char *ts = get_time_string(t);
187 ret = client_write(fd, ts);
193 if (mask & (1 << SI_AUDIOD_UPTIME)) {
194 char *tmp, *us = uptime_str();
195 tmp = make_message("%s: %s\n",
196 status_item_list[SI_AUDIOD_UPTIME], us);
198 ret = client_write(fd, tmp);
203 if (mask & (1 << SI_AUDIOD_STATUS)) {
204 char *s = audiod_status_string();
205 ret = client_write(fd, s);
210 if (mask & (1 << SI_DECODER_FLAGS)) {
211 char *df = decoder_flags();
212 ret = client_write(fd, df);
217 FOR_EACH_STATUS_ITEM(i) {
219 if (!((1 << i) & mask))
221 v = stat_item_values[i];
222 tmp = make_message("%s%s%s", buf? buf: "",
223 v? v : "", v? "\n" : "");
227 ret = client_write(fd, buf);
230 ret = stat_client_add(fd, mask);
235 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
240 struct slot_info *s = &slot[i];
241 if (s->format < 0 || !s->fc)
243 if (slot_num >= 0 && slot_num != i)
245 if (format >= 0 && s->format != format)
247 if (num_filters(i) <= filternum)
250 return s->fc->filter_nodes + filternum;
255 int com_grab(int fd, char *cmdline)
257 struct grab_client *gc;
258 struct filter_node *fn;
262 gc = grab_client_new(fd, cmdline, &err);
265 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
267 activate_grab_client(gc, fn);
270 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
272 if (err == -E_GC_HELP_GIVEN) {
273 msg = make_message("%s\n\n", grab_client_args_info_usage);
274 for (i = 0; grab_client_args_info_help[i]; i++) {
275 char *tmp = make_message("%s%s\n", msg,
276 grab_client_args_info_help[i]);
281 msg = make_message("%s %s\n",
282 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
283 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
284 err = client_write(fd, msg);
292 __noreturn int com_term(int fd, __a_unused int argc, __a_unused char **argv)
295 clean_exit(EXIT_SUCCESS, "terminating on user request");
298 int com_on(int fd, __a_unused int argc, __a_unused char **argv)
300 audiod_status = AUDIOD_ON;
305 int com_off(int fd, __a_unused int argc, __a_unused char **argv)
307 audiod_status = AUDIOD_OFF;
312 int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
314 audiod_status = AUDIOD_STANDBY;
319 int com_cycle(int fd, int argc, char **argv)
321 switch (audiod_status) {
323 return com_sb(fd, argc, argv);
326 return com_on(fd, argc, argv);
329 return com_off(fd, argc, argv);
336 static int check_perms(uid_t uid)
340 if (!conf.user_allow_given)
342 for (i = 0; i < conf.user_allow_given; i++)
343 if (uid == conf.user_allow_arg[i])
345 return -E_UCRED_PERM;
349 * handle arriving connections on the local socket
351 * \param accept_fd the fd to call accept() on
353 * This is called whenever para_audiod's main task detects an incoming
354 * connection by the readability of \a accept_fd. This function reads the
355 * command sent by the peer, checks the connecting user's permissions by using
356 * unix socket credentials (if supported by the OS) and calls the corresponding
357 * command handler if permissions are OK.
359 * \return positive on success, negative on errors
361 * \sa para_accept(), recv_cred_buffer()
363 int handle_connect(int accept_fd)
365 int i, argc, ret, clifd = -1;
366 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
367 struct sockaddr_un unix_addr;
370 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
374 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
378 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
379 ret = check_perms(uid);
382 ret = -E_INVALID_AUDIOD_CMD;
383 cmd = para_strdup(buf);
384 p = strchr(cmd, '\n');
391 for (i = 0; audiod_cmds[i].name; i++) {
393 if (strcmp(audiod_cmds[i].name, cmd))
395 if (audiod_cmds[i].handler) {
396 argc = split_args(buf, &argv, "\n");
397 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
398 ret = audiod_cmds[i].handler(clifd, argc, argv);
401 for (j = 0; p[j]; j++)
404 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
405 ret = audiod_cmds[i].line_handler(clifd, p);
408 ret = -E_INVALID_AUDIOD_CMD;
413 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
414 char *tmp = make_message("%s\n", para_strerror(-ret));
415 client_write(clifd, tmp);
422 * send the current audiod status to all connected stat clients
424 void audiod_status_dump(void)
426 struct timeval *t = wstime();
427 char *old, *new, *tmp;
429 old = stat_item_values[SI_PLAY_TIME];
430 new = get_time_string(t);
432 if (!old || strcmp(old, new)) {
434 stat_client_write(new, SI_PLAY_TIME);
435 stat_item_values[SI_PLAY_TIME] = new;
441 old = stat_item_values[SI_AUDIOD_UPTIME];
442 if (!old || strcmp(old, new)) {
444 tmp = make_message("%s: %s\n",
445 status_item_list[SI_AUDIOD_UPTIME], new);
446 stat_client_write(tmp, SI_AUDIOD_UPTIME);
448 stat_item_values[SI_AUDIOD_UPTIME] = new;
452 old = stat_item_values[SI_AUDIOD_STATUS];
453 new = audiod_status_string();
454 if (!old || strcmp(old, new)) {
456 stat_client_write(new, SI_AUDIOD_STATUS);
457 stat_item_values[SI_AUDIOD_STATUS] = new;
461 old = stat_item_values[SI_DECODER_FLAGS];
462 new = decoder_flags();
463 if (!old || strcmp(old, new)) {
465 stat_client_write(new, SI_DECODER_FLAGS);
466 stat_item_values[SI_DECODER_FLAGS] = new;
472 * send empty status list
474 * Send to each connected client the full status item list
477 void dump_empty_status(void)
481 FOR_EACH_STATUS_ITEM(i) {
482 char *tmp = make_message("%s:\n", status_item_list[i]);
483 stat_client_write(tmp, i);
485 free(stat_item_values[i]);
486 stat_item_values[i] = NULL;