/*
- * Copyright (C) 2005-2006 Andre Noll <noll@mathematik.tu-darmstadt.de>
+ * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file audiod_command.c commands for para_audiod */
#include "daemon.h"
#include "string.h"
#include "fd.h"
-
-/** defines one command of para_audiod */
-struct audiod_command {
- /** the name of the command */
- const char *name;
- /** pointer to the function that handles the command */
- int (*handler)(int, int, char**);
- /**
- * if the command prefers to handle the full line (rather than the usual
- * argv[] array), it stores a pointer to the corresponding line handling
- * function here. In this case, the above \a handler pointer must be NULL.
- */
- int (*line_handler)(int, char*);
- /** one-line description of the command */
- const char *description;
- /** summary of the command line options */
- const char *synopsis;
- /** the long help text */
- const char *help;
-};
-static int com_grab(int, char *);
-static int com_cycle(int, int, char **);
-static int com_help(int, int, char **);
-static int com_kill(int, int, char **);
-static int com_off(int, int, char **);
-static int com_on(int, int, char **);
-static int com_sb(int, int, char **);
-static int com_stat(int, int, char **);
-static int com_tasks(int, int, char **);
-static int com_term(int, int, char **);
-static struct audiod_command cmds[] = {
-{
-.name = "cycle",
-.handler = com_cycle,
-.description = "switch to next mode",
-.synopsis = "cycle",
-.help =
-
-"on -> standby -> off -> on\n"
-
-},
-{
-.name = "grab",
-.line_handler = com_grab,
-.description = "grab the audio stream",
-.synopsis = "-- grab [grab_options]",
-.help =
-
-"grab ('splice') the audio stream at any position in the filter \n"
-"chain and send that data back to the client. Try\n"
-"\t para_audioc -- grab -h\n"
-"for the list of available options.\n"
-},
-
-{
-.name = "help",
-.handler = com_help,
-.description = "display command list or help for given command",
-.synopsis = "help [command]",
-.help =
-
-"When I was younger, so much younger than today, I never needed\n"
-"anybody's help in any way. But now these days are gone, I'm not so\n"
-"self assured. Now I find I've changed my mind and opened up the doors.\n"
-"\n"
-" -- Beatles: Help\n"
-
-},
-{
-.name = "kill",
-.handler = com_kill,
-.description = "kill an active audiod task",
-.synopsis = "kill task_id [task_id ...]",
-.help =
-
-"call sched_unregister() and the event_handler of the given task(s)\n"
-
-},
-{
-.name = "off",
-.handler = com_off,
-.description = "deactivate para_audiod",
-.synopsis = "off",
-.help =
-
-"Close connection to para_server and stop all decoders.\n"
-
-},
-{
-.name = "on",
-.handler = com_on,
-.description = "activate para_audiod",
-.synopsis = "on",
-.help =
-
-"Establish connection to para_server, retrieve para_server's current\n"
-"status. If playing, start corresponding decoder. Otherwise stop\n"
-"all decoders.\n"
-
-},
-{
-.name = "sb",
-.handler = com_sb,
-.description = "enter standby mode",
-.synopsis = "sb",
-.help =
-
-"Stop all decoders but leave connection to para_server open.\n"
-
-},
-{
-.name = "stat",
-.handler = com_stat,
-.description = "print status information",
-.synopsis = "stat [item1 ...]",
-.help =
-
-"Dump given status items (all if none given) to stdout.\n"
-
-},
-{
-.name = "tasks",
-.handler = com_tasks,
-.description = "list current tasks",
-.synopsis = "tasks",
-.help =
-
-"print the list of task ids together with the status of each task\n"
-
-},
-{
-.name = "term",
-.handler = com_term,
-.description = "terminate audiod",
-.synopsis = "term",
-.help =
-
-"Stop all decoders, shut down connection to para_server and exit.\n"
-
-},
-{
-.name = NULL,
-}
-};
+#include "audiod_command_list.h"
/** iterate over the array of all audiod commands */
-#define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
+#define FOR_EACH_COMMAND(c) for (c = 0; audiod_cmds[c].name; c++)
static int client_write(int fd, const char *buf)
{
__malloc static char *decoder_flags(void)
{
int i;
- char decoder_flags[MAX_STREAM_SLOTS + 1];
+ char flags[MAX_STREAM_SLOTS + 1];
FOR_EACH_SLOT(i) {
struct slot_info *s = &slot[i];
flag += 1;
if (s->wng)
flag += 2;
- decoder_flags[i] = flag;
+ flags[i] = flag;
}
- decoder_flags[MAX_STREAM_SLOTS] = '\0';
+ flags[MAX_STREAM_SLOTS] = '\0';
return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
- decoder_flags);
+ flags);
}
static int dump_commands(int fd)
ssize_t ret;
FOR_EACH_COMMAND(i) {
- tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
- cmds[i].description);
+ tmp = make_message("%s%s\t%s\n", buf, audiod_cmds[i].name,
+ audiod_cmds[i].description);
free(buf);
buf = tmp;
}
* to each individual command to close the fd if necessary.
*/
-static int com_help(int fd, int argc, char **argv)
+int com_help(int fd, int argc, char **argv)
{
int i, ret;
char *buf;
goto out;
}
FOR_EACH_COMMAND(i) {
- if (strcmp(cmds[i].name, argv[1]))
+ if (strcmp(audiod_cmds[i].name, argv[1]))
continue;
buf = make_message(
"NAME\n\t%s -- %s\n"
"SYNOPSIS\n\tpara_audioc %s\n"
"DESCRIPTION\n%s\n",
argv[1],
- cmds[i].description,
- cmds[i].synopsis,
- cmds[i].help
+ audiod_cmds[i].description,
+ audiod_cmds[i].usage,
+ audiod_cmds[i].help
);
ret = client_write(fd, buf);
free(buf);
return ret;
}
-static int com_tasks(int fd, __a_unused int argc, __a_unused char **argv)
+int com_tasks(int fd, __a_unused int argc, __a_unused char **argv)
{
char *tl = get_task_list();
int ret = 1;
return ret;
}
-static int com_kill(int fd, int argc, char **argv)
+int com_kill(int fd, int argc, char **argv)
{
int i, ret = 1;
if (argc < 2)
return ret;
}
-static int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
+int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
{
int i, ret;
char *buf = NULL;
return NULL;
}
-static int com_grab(int fd, char *cmdline)
+int com_grab(int fd, char *cmdline)
{
struct grab_client *gc;
struct filter_node *fn;
return 1;
}
-static int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
+__noreturn int com_term(int fd, __a_unused int argc, __a_unused char **argv)
{
close(fd);
clean_exit(EXIT_SUCCESS, "terminating on user request");
}
-static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
+int com_on(int fd, __a_unused int argc, __a_unused char **argv)
{
audiod_status = AUDIOD_ON;
close(fd);
return 1;
}
-static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
+int com_off(int fd, __a_unused int argc, __a_unused char **argv)
{
audiod_status = AUDIOD_OFF;
close(fd);
return 1;
}
-static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
+int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
{
audiod_status = AUDIOD_STANDBY;
close(fd);
return 1;
}
-static int com_cycle(int fd, int argc, char **argv)
+int com_cycle(int fd, int argc, char **argv)
{
switch (audiod_status) {
case AUDIOD_ON:
return -E_UCRED_PERM;
}
+/**
+ * handle arriving connections on the local socket
+ *
+ * \param accept_fd the fd to call accept() on
+ *
+ * This is called whenever para_audiod's main task detects an incoming
+ * connection by the readability of \a accept_fd. This function reads the
+ * command sent by the peer, checks the connecting user's permissions by using
+ * unix socket credentials (if supported by the OS) and calls the corresponding
+ * command handler if permissions are OK.
+ *
+ * \return positive on success, negative on errors
+ *
+ * \sa para_accept(), recv_cred_buffer()
+ * */
int handle_connect(int accept_fd)
{
int i, argc, ret, clifd = -1;
char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
struct sockaddr_un unix_addr;
+ uid_t uid;
ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
if (ret < 0)
ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
if (ret < 0)
goto out;
+ uid = ret;
PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
- ret = check_perms(ret);
+ ret = check_perms(uid);
if (ret < 0)
goto out;
ret = -E_INVALID_AUDIOD_CMD;
*p = '\0';
p++;
}
- for (i = 0; cmds[i].name; i++) {
+ for (i = 0; audiod_cmds[i].name; i++) {
int j;
- if (strcmp(cmds[i].name, cmd))
+ if (strcmp(audiod_cmds[i].name, cmd))
continue;
- if (cmds[i].handler) {
+ if (audiod_cmds[i].handler) {
argc = split_args(buf, &argv, "\n");
PARA_INFO_LOG("argv[0]: %s, argc= %d\n", argv[0], argc);
- ret = cmds[i].handler(clifd, argc, argv);
+ ret = audiod_cmds[i].handler(clifd, argc, argv);
goto out;
}
for (j = 0; p[j]; j++)
if (p[j] == '\n')
p[j] = ' ';
PARA_INFO_LOG("cmd: %s, options: %s\n", cmd, p);
- ret = cmds[i].line_handler(clifd, p);
+ ret = audiod_cmds[i].line_handler(clifd, p);
goto out;
}
ret = -E_INVALID_AUDIOD_CMD;
}
return ret;
}
-
+/**
+ * send the current audiod status to all connected stat clients
+ */
void audiod_status_dump(void)
{
- static char *p_ts, *p_us, *p_as, *p_df;
struct timeval *t = wstime();
- char *us, *tmp = get_time_string(t);
-
- if (tmp && (!p_ts || strcmp(tmp, p_ts)))
- stat_client_write(tmp, SI_PLAY_TIME);
- free(p_ts);
- p_ts = tmp;
+ char *old, *new, *tmp;
+
+ old = stat_task->stat_item_values[SI_PLAY_TIME];
+ new = get_time_string(t);
+ if (new) {
+ if (!old || strcmp(old, new)) {
+ free(old);
+ stat_client_write(new, SI_PLAY_TIME);
+ stat_task->stat_item_values[SI_PLAY_TIME] = new;
+ } else
+ free(new);
+ }
- us = uptime_str();
- tmp = make_message("%s:%s\n", status_item_list[SI_AUDIOD_UPTIME], us);
- free(us);
- if (!p_us || strcmp(p_us, tmp))
+ new = uptime_str();
+ old = stat_task->stat_item_values[SI_AUDIOD_UPTIME];
+ if (!old || strcmp(old, new)) {
+ free(old);
+ tmp = make_message("%s:%s\n",
+ status_item_list[SI_AUDIOD_UPTIME], new);
stat_client_write(tmp, SI_AUDIOD_UPTIME);
- free(p_us);
- p_us = tmp;
-
- tmp = audiod_status_string();
- if (!p_as || strcmp(p_as, tmp))
- stat_client_write(tmp, SI_AUDIOD_STATUS);
- free(p_as);
- p_as = tmp;
-
- tmp = decoder_flags();
- if (!p_df || strcmp(p_df, tmp))
- stat_client_write(tmp, SI_DECODER_FLAGS);
- free(p_df);
- p_df = tmp;
+ free(tmp);
+ stat_task->stat_item_values[SI_AUDIOD_UPTIME] = new;
+ } else
+ free(new);
+
+ old = stat_task->stat_item_values[SI_AUDIOD_STATUS];
+ new = audiod_status_string();
+ if (!old || strcmp(old, new)) {
+ free(old);
+ stat_client_write(new, SI_AUDIOD_STATUS);
+ stat_task->stat_item_values[SI_AUDIOD_STATUS] = new;
+ } else
+ free(new);
+
+ old = stat_task->stat_item_values[SI_DECODER_FLAGS];
+ new = decoder_flags();
+ if (!old || strcmp(old, new)) {
+ free(old);
+ stat_client_write(new, SI_DECODER_FLAGS);
+ stat_task->stat_item_values[SI_DECODER_FLAGS] = new;
+ } else
+ free(new);
}
+/**
+ * send empty status list
+ *
+ * Send to each connected client the full status item list
+ * with empty values.
+ */
+void dump_empty_status(void)
+{
+ int i;
+
+ FOR_EACH_STAT_ITEM(i) {
+ char *tmp = make_message("%s:\n", status_item_list[i]);
+ stat_client_write(tmp, i);
+ free(tmp);
+ free(stat_task->stat_item_values[i]);
+ stat_task->stat_item_values[i] = NULL;
+ }
+}
projects / paraslash.git / blobdiff