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 FOR_EACH_STATUS_ITEM(i) {
188 if (!((one << i) & mask))
190 v = stat_item_values[i];
193 tmp = make_message("%s%s%s", buf? buf: "", v,
194 strrchr(v, '\n')? "" : "\n");
198 ret = client_write(fd, buf);
201 ret = stat_client_add(fd, mask);
206 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
211 struct slot_info *s = &slot[i];
212 if (s->format < 0 || !s->fc)
214 if (slot_num >= 0 && slot_num != i)
216 if (format >= 0 && s->format != format)
218 if (num_filters(i) <= filternum)
221 return s->fc->filter_nodes + filternum;
226 int com_grab(int fd, char *cmdline)
228 struct grab_client *gc;
229 struct filter_node *fn;
233 gc = grab_client_new(fd, cmdline, &err);
236 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
238 activate_grab_client(gc, fn);
241 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
243 if (err == -E_GC_HELP_GIVEN) {
244 msg = make_message("%s\n\n", grab_client_args_info_usage);
245 for (i = 0; grab_client_args_info_help[i]; i++) {
246 char *tmp = make_message("%s%s\n", msg,
247 grab_client_args_info_help[i]);
252 msg = make_message("%s %s\n",
253 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
254 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
255 err = client_write(fd, msg);
263 __noreturn int com_term(int fd, __a_unused int argc, __a_unused char **argv)
266 clean_exit(EXIT_SUCCESS, "terminating on user request");
269 int com_on(int fd, __a_unused int argc, __a_unused char **argv)
271 audiod_status = AUDIOD_ON;
276 int com_off(int fd, __a_unused int argc, __a_unused char **argv)
278 audiod_status = AUDIOD_OFF;
283 int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
285 audiod_status = AUDIOD_STANDBY;
290 int com_cycle(int fd, int argc, char **argv)
292 switch (audiod_status) {
294 return com_sb(fd, argc, argv);
297 return com_on(fd, argc, argv);
300 return com_off(fd, argc, argv);
307 static int check_perms(uid_t uid)
311 if (!conf.user_allow_given)
313 for (i = 0; i < conf.user_allow_given; i++)
314 if (uid == conf.user_allow_arg[i])
316 return -E_UCRED_PERM;
320 * handle arriving connections on the local socket
322 * \param accept_fd the fd to call accept() on
324 * This is called whenever para_audiod's main task detects an incoming
325 * connection by the readability of \a accept_fd. This function reads the
326 * command sent by the peer, checks the connecting user's permissions by using
327 * unix socket credentials (if supported by the OS) and calls the corresponding
328 * command handler if permissions are OK.
330 * \return positive on success, negative on errors
332 * \sa para_accept(), recv_cred_buffer()
334 int handle_connect(int accept_fd)
336 int i, argc, ret, clifd = -1;
337 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
338 struct sockaddr_un unix_addr;
341 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
345 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
349 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
350 ret = check_perms(uid);
353 cmd = para_strdup(buf);
354 p = strchr(cmd, '\n');
361 for (i = 0; audiod_cmds[i].name; i++) {
363 if (strcmp(audiod_cmds[i].name, cmd))
365 if (audiod_cmds[i].handler) {
366 argc = split_args(buf, &argv, "\n");
367 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
368 ret = audiod_cmds[i].handler(clifd, argc, argv);
371 for (j = 0; p[j]; j++)
374 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
375 ret = audiod_cmds[i].line_handler(clifd, p);
378 ret = -E_INVALID_AUDIOD_CMD;
383 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
384 char *tmp = make_message("%s\n", para_strerror(-ret));
385 client_write(clifd, tmp);
392 * send the current audiod status to all connected stat clients
394 void audiod_status_dump(void)
396 int slot_num = get_play_time_slot_num();
397 char *old, *new, *tmp;
399 old = stat_item_values[SI_PLAY_TIME];
400 new = get_time_string(slot_num);
402 if (!old || strcmp(old, new)) {
404 stat_client_write(new, SI_PLAY_TIME);
405 stat_item_values[SI_PLAY_TIME] = new;
411 new = make_message("%s: %s\n", status_item_list[SI_AUDIOD_UPTIME],
414 old = stat_item_values[SI_AUDIOD_UPTIME];
415 if (!old || strcmp(old, new)) {
417 stat_client_write(new, SI_AUDIOD_UPTIME);
418 stat_item_values[SI_AUDIOD_UPTIME] = new;
422 old = stat_item_values[SI_AUDIOD_STATUS];
423 new = audiod_status_string();
424 if (!old || strcmp(old, new)) {
426 stat_client_write(new, SI_AUDIOD_STATUS);
427 stat_item_values[SI_AUDIOD_STATUS] = new;
431 old = stat_item_values[SI_DECODER_FLAGS];
432 new = decoder_flags();
433 if (!old || strcmp(old, new)) {
435 stat_client_write(new, SI_DECODER_FLAGS);
436 stat_item_values[SI_DECODER_FLAGS] = new;
442 * send empty status list
444 * Send to each connected client the full status item list
447 void dump_empty_status(void)
451 FOR_EACH_STATUS_ITEM(i) {
452 char *tmp = make_message("%s:\n", status_item_list[i]);
453 stat_client_write(tmp, i);
455 free(stat_item_values[i]);
456 stat_item_values[i] = NULL;