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, int argc, char **argv)
174 const uint64_t one = 1;
177 for (i = 1; i < argc; i++) {
178 ret = stat_item_valid(argv[i]);
181 mask |= (one << ret);
184 mask--; /* set all bits */
185 PARA_INFO_LOG("mask: 0x%llx\n", (long long unsigned)mask);
186 if (mask & (one << SI_PLAY_TIME)) {
187 int slot_num = get_play_time_slot_num();
188 char *ts = get_time_string(slot_num);
190 ret = client_write(fd, ts);
196 if (mask & (one << SI_AUDIOD_UPTIME)) {
197 char *tmp, *us = uptime_str();
198 tmp = make_message("%s: %s\n",
199 status_item_list[SI_AUDIOD_UPTIME], us);
201 ret = client_write(fd, tmp);
206 if (mask & (one << SI_AUDIOD_STATUS)) {
207 char *s = audiod_status_string();
208 ret = client_write(fd, s);
213 if (mask & (one << SI_DECODER_FLAGS)) {
214 char *df = decoder_flags();
215 ret = client_write(fd, df);
220 FOR_EACH_STATUS_ITEM(i) {
222 if (!((one << i) & mask))
224 v = stat_item_values[i];
225 tmp = make_message("%s%s%s", buf? buf: "",
226 v? v : "", v? "\n" : "");
230 ret = client_write(fd, buf);
233 ret = stat_client_add(fd, mask);
238 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
243 struct slot_info *s = &slot[i];
244 if (s->format < 0 || !s->fc)
246 if (slot_num >= 0 && slot_num != i)
248 if (format >= 0 && s->format != format)
250 if (num_filters(i) <= filternum)
253 return s->fc->filter_nodes + filternum;
258 int com_grab(int fd, char *cmdline)
260 struct grab_client *gc;
261 struct filter_node *fn;
265 gc = grab_client_new(fd, cmdline, &err);
268 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
270 activate_grab_client(gc, fn);
273 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
275 if (err == -E_GC_HELP_GIVEN) {
276 msg = make_message("%s\n\n", grab_client_args_info_usage);
277 for (i = 0; grab_client_args_info_help[i]; i++) {
278 char *tmp = make_message("%s%s\n", msg,
279 grab_client_args_info_help[i]);
284 msg = make_message("%s %s\n",
285 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
286 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
287 err = client_write(fd, msg);
295 __noreturn int com_term(int fd, __a_unused int argc, __a_unused char **argv)
298 clean_exit(EXIT_SUCCESS, "terminating on user request");
301 int com_on(int fd, __a_unused int argc, __a_unused char **argv)
303 audiod_status = AUDIOD_ON;
308 int com_off(int fd, __a_unused int argc, __a_unused char **argv)
310 audiod_status = AUDIOD_OFF;
315 int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
317 audiod_status = AUDIOD_STANDBY;
322 int com_cycle(int fd, int argc, char **argv)
324 switch (audiod_status) {
326 return com_sb(fd, argc, argv);
329 return com_on(fd, argc, argv);
332 return com_off(fd, argc, argv);
339 static int check_perms(uid_t uid)
343 if (!conf.user_allow_given)
345 for (i = 0; i < conf.user_allow_given; i++)
346 if (uid == conf.user_allow_arg[i])
348 return -E_UCRED_PERM;
352 * handle arriving connections on the local socket
354 * \param accept_fd the fd to call accept() on
356 * This is called whenever para_audiod's main task detects an incoming
357 * connection by the readability of \a accept_fd. This function reads the
358 * command sent by the peer, checks the connecting user's permissions by using
359 * unix socket credentials (if supported by the OS) and calls the corresponding
360 * command handler if permissions are OK.
362 * \return positive on success, negative on errors
364 * \sa para_accept(), recv_cred_buffer()
366 int handle_connect(int accept_fd)
368 int i, argc, ret, clifd = -1;
369 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
370 struct sockaddr_un unix_addr;
373 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
377 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
381 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
382 ret = check_perms(uid);
385 cmd = para_strdup(buf);
386 p = strchr(cmd, '\n');
393 for (i = 0; audiod_cmds[i].name; i++) {
395 if (strcmp(audiod_cmds[i].name, cmd))
397 if (audiod_cmds[i].handler) {
398 argc = split_args(buf, &argv, "\n");
399 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
400 ret = audiod_cmds[i].handler(clifd, argc, argv);
403 for (j = 0; p[j]; j++)
406 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
407 ret = audiod_cmds[i].line_handler(clifd, p);
410 ret = -E_INVALID_AUDIOD_CMD;
415 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
416 char *tmp = make_message("%s\n", para_strerror(-ret));
417 client_write(clifd, tmp);
424 * send the current audiod status to all connected stat clients
426 void audiod_status_dump(void)
428 int slot_num = get_play_time_slot_num();
429 char *old, *new, *tmp;
431 old = stat_item_values[SI_PLAY_TIME];
432 new = get_time_string(slot_num);
434 if (!old || strcmp(old, new)) {
436 stat_client_write(new, SI_PLAY_TIME);
437 stat_item_values[SI_PLAY_TIME] = new;
443 old = stat_item_values[SI_AUDIOD_UPTIME];
444 if (!old || strcmp(old, new)) {
446 tmp = make_message("%s: %s\n",
447 status_item_list[SI_AUDIOD_UPTIME], new);
448 stat_client_write(tmp, SI_AUDIOD_UPTIME);
450 stat_item_values[SI_AUDIOD_UPTIME] = new;
454 old = stat_item_values[SI_AUDIOD_STATUS];
455 new = audiod_status_string();
456 if (!old || strcmp(old, new)) {
458 stat_client_write(new, SI_AUDIOD_STATUS);
459 stat_item_values[SI_AUDIOD_STATUS] = new;
463 old = stat_item_values[SI_DECODER_FLAGS];
464 new = decoder_flags();
465 if (!old || strcmp(old, new)) {
467 stat_client_write(new, SI_DECODER_FLAGS);
468 stat_item_values[SI_DECODER_FLAGS] = new;
474 * send empty status list
476 * Send to each connected client the full status item list
479 void dump_empty_status(void)
483 FOR_EACH_STATUS_ITEM(i) {
484 char *tmp = make_message("%s:\n", status_item_list[i]);
485 stat_client_write(tmp, i);
487 free(stat_item_values[i]);
488 stat_item_values[i] = NULL;