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 int get_play_time_slot_num(void)
54 struct slot_info *s = &slot[i];
57 if (oldest >= 0 && tv_diff(&s->wstime, &slot[oldest].wstime,
65 __malloc static char *decoder_flags(void)
68 char flags[MAX_STREAM_SLOTS + 1];
71 struct slot_info *s = &slot[i];
79 flags[MAX_STREAM_SLOTS] = '\0';
80 return make_message("%s: %s\n", status_item_list[SI_DECODER_FLAGS],
84 static int dump_commands(int fd)
86 char *buf = para_strdup(""), *tmp = NULL;
91 tmp = make_message("%s%s\t%s\n", buf, audiod_cmds[i].name,
92 audiod_cmds[i].description);
96 ret = client_write(fd, buf);
102 * command handlers don't close their fd on errors (ret < 0) so that
103 * its caller can send an error message. Otherwise (ret >= 0) it's up
104 * to each individual command to close the fd if necessary.
107 int com_help(int fd, int argc, char **argv)
111 const char *dflt = "No such command. Available commands:\n";
114 ret = dump_commands(fd);
117 FOR_EACH_COMMAND(i) {
118 if (strcmp(audiod_cmds[i].name, argv[1]))
122 "SYNOPSIS\n\tpara_audioc %s\n"
125 audiod_cmds[i].description,
126 audiod_cmds[i].usage,
129 ret = client_write(fd, buf);
133 ret = client_write(fd, dflt);
135 ret = dump_commands(fd);
142 int com_tasks(int fd, __a_unused int argc, __a_unused char **argv)
144 char *tl = get_task_list();
147 ret = client_write(fd, tl);
154 int com_kill(int fd, int argc, char **argv)
158 return -E_AUDIOD_SYNTAX;
159 for (i = 1; i < argc; i++) {
160 ret = kill_task(argv[i]);
169 int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
173 long unsigned mask = ~0LU;
177 for (i = 1; i < argc; i++) {
178 ret = stat_item_valid(argv[i]);
184 PARA_INFO_LOG("mask: 0x%lx\n", mask);
185 if (mask & (1 << SI_PLAY_TIME)) {
186 int slot_num = get_play_time_slot_num();
187 char *ts = get_time_string(slot_num);
189 ret = client_write(fd, ts);
195 if (mask & (1 << SI_AUDIOD_UPTIME)) {
196 char *tmp, *us = uptime_str();
197 tmp = make_message("%s: %s\n",
198 status_item_list[SI_AUDIOD_UPTIME], us);
200 ret = client_write(fd, tmp);
205 if (mask & (1 << SI_AUDIOD_STATUS)) {
206 char *s = audiod_status_string();
207 ret = client_write(fd, s);
212 if (mask & (1 << SI_DECODER_FLAGS)) {
213 char *df = decoder_flags();
214 ret = client_write(fd, df);
219 FOR_EACH_STATUS_ITEM(i) {
221 if (!((1 << i) & mask))
223 v = stat_item_values[i];
224 tmp = make_message("%s%s%s", buf? buf: "",
225 v? v : "", v? "\n" : "");
229 ret = client_write(fd, buf);
232 ret = stat_client_add(fd, mask);
237 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
242 struct slot_info *s = &slot[i];
243 if (s->format < 0 || !s->fc)
245 if (slot_num >= 0 && slot_num != i)
247 if (format >= 0 && s->format != format)
249 if (num_filters(i) <= filternum)
252 return s->fc->filter_nodes + filternum;
257 int com_grab(int fd, char *cmdline)
259 struct grab_client *gc;
260 struct filter_node *fn;
264 gc = grab_client_new(fd, cmdline, &err);
267 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
269 activate_grab_client(gc, fn);
272 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
274 if (err == -E_GC_HELP_GIVEN) {
275 msg = make_message("%s\n\n", grab_client_args_info_usage);
276 for (i = 0; grab_client_args_info_help[i]; i++) {
277 char *tmp = make_message("%s%s\n", msg,
278 grab_client_args_info_help[i]);
283 msg = make_message("%s %s\n",
284 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
285 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
286 err = client_write(fd, msg);
294 __noreturn int com_term(int fd, __a_unused int argc, __a_unused char **argv)
297 clean_exit(EXIT_SUCCESS, "terminating on user request");
300 int com_on(int fd, __a_unused int argc, __a_unused char **argv)
302 audiod_status = AUDIOD_ON;
307 int com_off(int fd, __a_unused int argc, __a_unused char **argv)
309 audiod_status = AUDIOD_OFF;
314 int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
316 audiod_status = AUDIOD_STANDBY;
321 int com_cycle(int fd, int argc, char **argv)
323 switch (audiod_status) {
325 return com_sb(fd, argc, argv);
328 return com_on(fd, argc, argv);
331 return com_off(fd, argc, argv);
338 static int check_perms(uid_t uid)
342 if (!conf.user_allow_given)
344 for (i = 0; i < conf.user_allow_given; i++)
345 if (uid == conf.user_allow_arg[i])
347 return -E_UCRED_PERM;
351 * handle arriving connections on the local socket
353 * \param accept_fd the fd to call accept() on
355 * This is called whenever para_audiod's main task detects an incoming
356 * connection by the readability of \a accept_fd. This function reads the
357 * command sent by the peer, checks the connecting user's permissions by using
358 * unix socket credentials (if supported by the OS) and calls the corresponding
359 * command handler if permissions are OK.
361 * \return positive on success, negative on errors
363 * \sa para_accept(), recv_cred_buffer()
365 int handle_connect(int accept_fd)
367 int i, argc, ret, clifd = -1;
368 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
369 struct sockaddr_un unix_addr;
372 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
376 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
380 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
381 ret = check_perms(uid);
384 cmd = para_strdup(buf);
385 p = strchr(cmd, '\n');
392 for (i = 0; audiod_cmds[i].name; i++) {
394 if (strcmp(audiod_cmds[i].name, cmd))
396 if (audiod_cmds[i].handler) {
397 argc = split_args(buf, &argv, "\n");
398 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
399 ret = audiod_cmds[i].handler(clifd, argc, argv);
402 for (j = 0; p[j]; j++)
405 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
406 ret = audiod_cmds[i].line_handler(clifd, p);
409 ret = -E_INVALID_AUDIOD_CMD;
414 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
415 char *tmp = make_message("%s\n", para_strerror(-ret));
416 client_write(clifd, tmp);
423 * send the current audiod status to all connected stat clients
425 void audiod_status_dump(void)
427 int slot_num = get_play_time_slot_num();
428 char *old, *new, *tmp;
430 old = stat_item_values[SI_PLAY_TIME];
431 new = get_time_string(slot_num);
433 if (!old || strcmp(old, new)) {
435 stat_client_write(new, SI_PLAY_TIME);
436 stat_item_values[SI_PLAY_TIME] = new;
442 old = stat_item_values[SI_AUDIOD_UPTIME];
443 if (!old || strcmp(old, new)) {
445 tmp = make_message("%s: %s\n",
446 status_item_list[SI_AUDIOD_UPTIME], new);
447 stat_client_write(tmp, SI_AUDIOD_UPTIME);
449 stat_item_values[SI_AUDIOD_UPTIME] = new;
453 old = stat_item_values[SI_AUDIOD_STATUS];
454 new = audiod_status_string();
455 if (!old || strcmp(old, new)) {
457 stat_client_write(new, SI_AUDIOD_STATUS);
458 stat_item_values[SI_AUDIOD_STATUS] = new;
462 old = stat_item_values[SI_DECODER_FLAGS];
463 new = decoder_flags();
464 if (!old || strcmp(old, new)) {
466 stat_client_write(new, SI_DECODER_FLAGS);
467 stat_item_values[SI_DECODER_FLAGS] = new;
473 * send empty status list
475 * Send to each connected client the full status item list
478 void dump_empty_status(void)
482 FOR_EACH_STATUS_ITEM(i) {
483 char *tmp = make_message("%s:\n", status_item_list[i]);
484 stat_client_write(tmp, i);
486 free(stat_item_values[i]);
487 stat_item_values[i] = NULL;