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)
43 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
46 __malloc static char *audiod_status_string(void)
48 const char *status = (audiod_status == AUDIOD_ON)?
49 "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
50 return para_strdup(status);
53 static int get_play_time_slot_num(void)
58 struct slot_info *s = &slot[i];
61 if (oldest >= 0 && tv_diff(&s->wstime, &slot[oldest].wstime,
69 __malloc static char *decoder_flags(void)
72 char flags[MAX_STREAM_SLOTS + 1];
75 struct slot_info *s = &slot[i];
85 flags[MAX_STREAM_SLOTS] = '\0';
86 return para_strdup(flags);
89 static int dump_commands(int fd)
91 char *buf = para_strdup(""), *tmp = NULL;
96 tmp = make_message("%s%s\t%s\n", buf, audiod_cmds[i].name,
97 audiod_cmds[i].description);
101 ret = client_write(fd, buf);
107 * command handlers don't close their fd on errors (ret < 0) so that
108 * its caller can send an error message. Otherwise (ret >= 0) it's up
109 * to each individual command to close the fd if necessary.
112 int com_help(int fd, int argc, char **argv)
116 const char *dflt = "No such command. Available commands:\n";
119 ret = dump_commands(fd);
122 FOR_EACH_COMMAND(i) {
123 if (strcmp(audiod_cmds[i].name, argv[1]))
127 "SYNOPSIS\n\tpara_audioc %s\n"
130 audiod_cmds[i].description,
131 audiod_cmds[i].usage,
134 ret = client_write(fd, buf);
138 ret = client_write(fd, dflt);
140 ret = dump_commands(fd);
147 int com_tasks(int fd, __a_unused int argc, __a_unused char **argv)
149 char *tl = get_task_list();
152 ret = client_write(fd, tl);
159 int com_kill(int fd, int argc, char **argv)
163 return -E_AUDIOD_SYNTAX;
164 for (i = 1; i < argc; i++) {
165 ret = kill_task(argv[i]);
174 int com_stat(int fd, int argc, char **argv)
176 int i, ret, parser_friendly = 0;
178 const uint64_t one = 1;
179 struct para_buffer b = {.flags = 0};
181 for (i = 1; i < argc; i++) {
182 const char *arg = argv[i];
185 if (!strcmp(arg, "--")) {
189 if (!strncmp(arg, "-p", 2)) {
191 b.flags = PBF_SIZE_PREFIX;
196 mask--; /* set all bits */
197 for (; i < argc; i++) {
198 ret = stat_item_valid(argv[i]);
201 mask |= (one << ret);
203 PARA_INFO_LOG("mask: 0x%llx\n", (long long unsigned)mask);
204 FOR_EACH_STATUS_ITEM(i) {
205 char *item = stat_item_values[i];
206 if (!((one << i) & mask))
208 WRITE_STATUS_ITEM(&b, i, "%s\n", item? item : "");
210 ret = client_write(fd, b.buf);
212 ret = stat_client_add(fd, mask, parser_friendly);
217 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
222 struct slot_info *s = &slot[i];
223 if (s->format < 0 || !s->fc)
225 if (slot_num >= 0 && slot_num != i)
227 if (format >= 0 && s->format != format)
229 if (num_filters(i) <= filternum)
232 return s->fc->filter_nodes + filternum;
237 int com_grab(int fd, char *cmdline)
239 struct grab_client *gc;
240 struct filter_node *fn;
244 gc = grab_client_new(fd, cmdline, &err);
247 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
249 activate_grab_client(gc, fn);
252 if (err != -E_GC_HELP_GIVEN && err != -E_GC_VERSION_GIVEN)
254 if (err == -E_GC_HELP_GIVEN) {
255 msg = make_message("%s\n\n", grab_client_args_info_usage);
256 for (i = 0; grab_client_args_info_help[i]; i++) {
257 char *tmp = make_message("%s%s\n", msg,
258 grab_client_args_info_help[i]);
263 msg = make_message("%s %s\n",
264 GRAB_CLIENT_CMDLINE_PARSER_PACKAGE,
265 GRAB_CLIENT_CMDLINE_PARSER_VERSION);
266 err = client_write(fd, msg);
274 __noreturn int com_term(int fd, __a_unused int argc, __a_unused char **argv)
277 clean_exit(EXIT_SUCCESS, "terminating on user request");
280 int com_on(int fd, __a_unused int argc, __a_unused char **argv)
282 audiod_status = AUDIOD_ON;
287 int com_off(int fd, __a_unused int argc, __a_unused char **argv)
289 audiod_status = AUDIOD_OFF;
294 int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
296 audiod_status = AUDIOD_STANDBY;
301 int com_cycle(int fd, int argc, char **argv)
303 switch (audiod_status) {
305 return com_sb(fd, argc, argv);
308 return com_on(fd, argc, argv);
311 return com_off(fd, argc, argv);
318 static int check_perms(uid_t uid)
322 if (!conf.user_allow_given)
324 for (i = 0; i < conf.user_allow_given; i++)
325 if (uid == conf.user_allow_arg[i])
327 return -E_UCRED_PERM;
331 * handle arriving connections on the local socket
333 * \param accept_fd the fd to call accept() on
335 * This is called whenever para_audiod's main task detects an incoming
336 * connection by the readability of \a accept_fd. This function reads the
337 * command sent by the peer, checks the connecting user's permissions by using
338 * unix socket credentials (if supported by the OS) and calls the corresponding
339 * command handler if permissions are OK.
341 * \return positive on success, negative on errors
343 * \sa para_accept(), recv_cred_buffer()
345 int handle_connect(int accept_fd)
347 int i, argc, ret, clifd = -1;
348 char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
349 struct sockaddr_un unix_addr;
352 ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
356 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
360 PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
361 ret = check_perms(uid);
364 cmd = para_strdup(buf);
365 p = strchr(cmd, '\n');
372 for (i = 0; audiod_cmds[i].name; i++) {
374 if (strcmp(audiod_cmds[i].name, cmd))
376 if (audiod_cmds[i].handler) {
377 argc = split_args(buf, &argv, "\n");
378 PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
379 ret = audiod_cmds[i].handler(clifd, argc, argv);
382 for (j = 0; p[j]; j++)
385 PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
386 ret = audiod_cmds[i].line_handler(clifd, p);
389 ret = -E_INVALID_AUDIOD_CMD;
394 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
395 char *tmp = make_message("%s\n", para_strerror(-ret));
396 client_write(clifd, tmp);
403 * Send the current audiod status to all connected stat clients.
405 void audiod_status_dump(void)
407 int slot_num = get_play_time_slot_num();
410 old = stat_item_values[SI_PLAY_TIME];
411 new = get_time_string(slot_num);
413 if (!old || strcmp(old, new)) {
415 stat_item_values[SI_PLAY_TIME] = new;
416 stat_client_write_item(SI_PLAY_TIME);
422 old = stat_item_values[SI_AUDIOD_UPTIME];
423 if (!old || strcmp(old, new)) {
425 stat_item_values[SI_AUDIOD_UPTIME] = new;
426 stat_client_write_item(SI_AUDIOD_UPTIME);
430 old = stat_item_values[SI_AUDIOD_STATUS];
431 new = audiod_status_string();
432 if (!old || strcmp(old, new)) {
434 stat_item_values[SI_AUDIOD_STATUS] = new;
435 stat_client_write_item(SI_AUDIOD_STATUS);
439 old = stat_item_values[SI_DECODER_FLAGS];
440 new = decoder_flags();
441 if (!old || strcmp(old, new)) {
443 stat_item_values[SI_DECODER_FLAGS] = new;
444 stat_client_write_item(SI_DECODER_FLAGS);
450 * Flush and send all status items.
452 * Send to each connected client the full status item list
455 void clear_and_dump_items(void)
459 FOR_EACH_STATUS_ITEM(i) {
460 free(stat_item_values[i]);
461 stat_item_values[i] = NULL;
462 stat_client_write_item(i);