/*
- * Copyright (C) 2005-2014 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
#include <sys/un.h>
#include <netdb.h>
#include <signal.h>
+#include <pwd.h>
#include "para.h"
#include "error.h"
struct timeval restart_barrier;
};
+/* Describes one instance of a receiver-filter-writer chain. */
+struct slot_info {
+ /* Number of the audio format in this slot. */
+ int format;
+ /* The stream_start status item announced by para_server. */
+ struct timeval server_stream_start;
+ /* The offset status item announced by para_server. */
+ unsigned offset_seconds;
+ /* The seconds_total status item announced by para_server. */
+ unsigned seconds_total;
+ /* The receiver info associated with this slot. */
+ struct receiver_node *receiver_node;
+ /* The array of filter nodes. */
+ struct filter_node *fns;
+ /* The array of writers attached to the last filter. */
+ struct writer_node *wns;
+};
+
+/** Maximal number of simultaneous instances. */
+#define MAX_STREAM_SLOTS 5
+
+/** Iterate over all slots. */
+#define FOR_EACH_SLOT(_slot) for (_slot = 0; _slot < MAX_STREAM_SLOTS; _slot++)
+
/**
* para_audiod uses \p MAX_STREAM_SLOTS different slots, each of which may
* be associated with a receiver/filter/writer triple. This array holds all
static char *socket_name;
static struct audio_format_info afi[NUM_AUDIO_FORMATS];
-static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
+static struct signal_task *signal_task;
static struct status_task status_task_struct;
+static uid_t *uid_whitelist;
+
/**
* the task that calls the status command of para_server
*
*/
static struct status_task *stat_task = &status_task_struct;
-/**
- * the task for handling audiod commands
+/*
+ * The task for handling audiod commands.
*
- * \sa struct task, struct sched
+ * We need two listening sockets for backward compability: on Linux systems
+ * fd[0] is an abstract socket (more precisely, a socket bound to an address in
+ * the abstract namespace), and fd[1] is the usual pathname socket. On other
+ * systems, fd[0] is negative, and only the pathname socket is used.
+ *
+ * For 0.5.x we accept connections on both sockets to make sure that old
+ * para_audioc versions can still connect. New versions use only the abstract
+ * socket. Hence after v0.6.0 we can go back to a single socket, either an
+ * abstract one (Linux) or a pathname socket (all other systems).
*/
struct command_task {
- /** the local listening socket */
- int fd;
+ /** The local listening sockets. */
+ int fd[2];
/** the associated task structure */
struct task *task;
};
return -E_UNSUPPORTED_AUDIO_FORMAT;
}
+/**
+ * Return the flags for the \a decoder_flags status item.
+ *
+ * Allocates a string which contains one octal digit per slot. Bit zero (value
+ * 1) is set if a receiver is active. Bit one (value 2) and bit three (value 4)
+ * have the analogous meaning for filter and writer, respectively.
+ *
+ * \return String that must be freed by the caller.
+ */
+__malloc char *audiod_get_decoder_flags(void)
+{
+ int i;
+ char flags[MAX_STREAM_SLOTS + 1];
+
+ FOR_EACH_SLOT(i) {
+ struct slot_info *s = &slot[i];
+ char flag = '0';
+ if (s->receiver_node)
+ flag += 1;
+ if (s->fns)
+ flag += 2;
+ if (s->wns)
+ flag += 4;
+ flags[i] = flag;
+ }
+ flags[MAX_STREAM_SLOTS] = '\0';
+ return para_strdup(flags);
+}
+
static int get_matching_audio_format_nums(const char *re)
{
int i, ret;
return ret;
}
+static int get_play_time_slot_num(void)
+{
+ int i, oldest_slot = -1;
+ struct timeval oldest_wstime = {0, 0};
+
+ FOR_EACH_SLOT(i) {
+ struct slot_info *s = &slot[i];
+ struct timeval wstime;
+ if (!s->wns || !s->wns[0].btrn)
+ continue;
+ btr_get_node_start(s->wns[0].btrn, &wstime);
+ if (oldest_slot >= 0 && tv_diff(&wstime, &oldest_wstime, NULL) > 0)
+ continue;
+ oldest_wstime = wstime;
+ oldest_slot = i;
+ }
+ return oldest_slot;
+}
+
/**
- * Compute the play time based on information of the given slot.
- *
- * \param slot_num The slot number (negative means: no slot).
+ * Compute the play time based on information of the current slot.
*
* This computes a string of the form "0:07 [3:33] (3%/3:40)" using information
* from the status items received from para_server and the start time of the
- * (first) writer of the given slot.
+ * (first) writer of the current slot.
*
* It has to take into account that the stream was probably not started at
* the beginning of the file, that the clock between the server and the client
* host may differ and that playback of the stream was delayed, e.g. because
- * the prebuffer filter is used in the filter configuration of the given slot.
+ * the prebuffer filter is used in the filter configuration.
*
- * If no writer is active in the given slot, or \a slot_num is negative
- * (indicating that para_audiod runs in standby mode), an approximation based
- * only on the status items is computed and the returned string is prefixed
- * with "~".
+ * If no writer is active, for example because para_audiod runs in standby
+ * mode, an approximation based only on the status items is computed and the
+ * returned string is prefixed with "~".
*
* \return A string that must be freed by the caller.
*/
-char *get_time_string(int slot_num)
+char *get_time_string(void)
{
int ret, seconds = 0, length;
struct timeval *tmp, sum, sss, /* server stream start */
wstime, /* writer start time */
wtime, /* now - writer start */
rskip; /* receiver start - sss */
+ int slot_num = get_play_time_slot_num();
struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
char *msg;
return para_strdup(NULL);
}
-static int want_colors(void)
-{
- if (conf.color_arg == color_arg_no)
- return 0;
- if (conf.color_arg == color_arg_yes)
- return 1;
- if (conf.logfile_given)
- return 0;
- return isatty(STDERR_FILENO);
-}
-
static void parse_config_or_die(void)
{
- int ret;
+ int ret, i;
char *config_file;
struct audiod_cmdline_parser_params params = {
.override = 0,
ret = file_exists(config_file);
if (conf.config_file_given && !ret) {
PARA_EMERG_LOG("can not read config file %s\n", config_file);
+ free(config_file);
goto err;
}
if (ret) {
daemon_set_loglevel(conf.loglevel_arg);
}
free(config_file);
+ if (conf.user_allow_given > 0) {
+ uid_whitelist = para_malloc(conf.user_allow_given
+ * sizeof(uid_t));
+ for (i = 0; i < conf.user_allow_given; i++) {
+ int32_t val;
+ struct passwd *pw;
+ ret = para_atoi32(conf.user_allow_arg[i], &val);
+ if (ret >= 0) {
+ uid_whitelist[i] = val;
+ continue;
+ }
+ errno = 0; /* see getpwnam(3) */
+ pw = getpwnam(conf.user_allow_arg[i]);
+ if (!pw) {
+ PARA_EMERG_LOG("invalid username: %s\n",
+ conf.user_allow_arg[i]);
+ goto err;
+ }
+ uid_whitelist[i] = pw->pw_uid;
+ }
+ }
return;
err:
- free(config_file);
exit(EXIT_FAILURE);
}
static void setup_signal_handling(void)
{
- sig_task->fd = para_signal_init();
- PARA_INFO_LOG("signal pipe: fd %d\n", sig_task->fd);
+ signal_task = signal_init_or_die();
para_install_sighandler(SIGINT);
para_install_sighandler(SIGTERM);
para_install_sighandler(SIGHUP);
task_reap(&s->receiver_node->task);
free(s->receiver_node);
s->receiver_node = NULL;
+ stat_task->current_audio_format_num = -1;
tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
&a->restart_barrier);
}
return;
for (i = a->num_filters - 1; i >= 0; i--) {
struct filter_node *fn = s->fns + i;
- struct filter *f;
+ const struct filter *f;
if (!fn)
continue;
- f = filters + fn->filter_num;
+ f = filter_get(fn->filter_num);
if (f->close)
f->close(fn);
btr_remove_node(&fn->btrn);
parent = s->receiver_node->btrn;
for (i = 0; i < nf; i++) {
char buf[20];
- struct filter *f = filters + a->filter_nums[i];
+ const struct filter *f = filter_get(a->filter_nums[i]);
fn = s->fns + i;
fn->filter_num = a->filter_nums[i];
fn->conf = a->filter_conf[i];
a->filter_conf[nf] = cfg;
a->num_filters++;
PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf,
- filters[filter_num].name);
+ filter_get(filter_num)->name);
return filter_num;
}
}
/* add "dec" to audio format name */
tmp = make_message("%sdec", audio_formats[i]);
- for (j = 0; filters[j].name; j++)
- if (!strcmp(tmp, filters[j].name))
+ for (j = 0; filter_get(j); j++)
+ if (!strcmp(tmp, filter_get(j)->name))
break;
free(tmp);
ret = -E_UNSUPPORTED_FILTER;
- if (!filters[j].name)
+ if (!filter_get(j))
goto out;
- tmp = para_strdup(filters[j].name);
+ tmp = para_strdup(filter_get(j)->name);
ret = add_filter(i, tmp);
free(tmp);
if (ret < 0)
goto out;
PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i],
- filters[j].name);
+ filter_get(j)->name);
}
out:
return ret;
}
/* does not unlink socket on errors */
-static int audiod_get_socket(void)
+static void init_local_sockets(struct command_task *ct)
{
- struct sockaddr_un unix_addr;
- int ret, fd;
-
if (conf.socket_given)
socket_name = para_strdup(conf.socket_arg);
else {
PARA_NOTICE_LOG("local socket: %s\n", socket_name);
if (conf.force_given)
unlink(socket_name);
- ret = create_local_socket(socket_name, &unix_addr,
+ ct->fd[0] = create_local_socket(socket_name, 0);
+ ct->fd[1] = create_local_socket(socket_name,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
- if (ret < 0)
- goto err;
- fd = ret;
- if (listen(fd , 5) < 0) {
- ret = -ERRNO_TO_PARA_ERROR(errno);
- goto err;
- }
- ret = mark_fd_nonblocking(fd);
- if (ret < 0)
- goto err;
- return fd;
-err:
- PARA_EMERG_LOG("%s\n", para_strerror(-ret));
+ if (ct->fd[0] >= 0 || ct->fd[1] >= 0)
+ return;
+ PARA_EMERG_LOG("%s\n", para_strerror(-ct->fd[1]));
exit(EXIT_FAILURE);
}
-static void signal_pre_select(struct sched *s, void *context)
-{
- struct signal_task *st = context;
- para_fd_set(st->fd, &s->rfds, &s->max_fileno);
-}
-
static int signal_post_select(struct sched *s, void *context)
{
struct signal_task *st = context;
static void command_pre_select(struct sched *s, void *context)
{
struct command_task *ct = context;
- para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
+ int i;
+
+ for (i = 0; i < 2; i++)
+ if (ct->fd[i] >= 0)
+ para_fd_set(ct->fd[i], &s->rfds, &s->max_fileno);
}
static int command_post_select(struct sched *s, void *context)
{
- int ret;
+ int ret, i;
struct command_task *ct = context;
static struct timeval last_status_dump;
struct timeval tmp, delay;
- bool force = true;
+ bool force = false;
ret = task_get_notification(ct->task);
if (ret < 0)
return ret;
- ret = handle_connect(ct->fd, &s->rfds);
- if (ret < 0) {
- PARA_ERROR_LOG("%s\n", para_strerror(-ret));
- if (ret == -E_AUDIOD_TERM) {
- task_notify_all(s, -ret);
- return ret;
- }
- } else if (ret > 0)
+ for (i = 0; i < 2; i++) {
+ if (ct->fd[i] < 0)
+ continue;
+ ret = handle_connect(ct->fd[i], &s->rfds, uid_whitelist);
+ if (ret < 0) {
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ if (ret == -E_AUDIOD_TERM) {
+ task_notify_all(s, -ret);
+ return ret;
+ }
+ } else if (ret > 0)
+ force = true;
+ }
+ if (force == true)
goto dump;
/* if last status dump was less than 500ms ago, do nothing */
delay.tv_sec = 5;
delay.tv_usec = 0;
tv_add(&last_status_dump, &delay, &tmp);
- if (tv_diff(now, &tmp, NULL) < 0)
- force = false;
+ if (tv_diff(now, &tmp, NULL) > 0)
+ force = true;
dump:
audiod_status_dump(force);
last_status_dump = *now;
static void init_command_task(struct command_task *ct)
{
- ct->fd = audiod_get_socket(); /* doesn't return on errors */
+ init_local_sockets(ct); /* doesn't return on errors */
ct->task = task_register(&(struct task_info) {
.name = "command",
close_unused_slots();
audiod_cmdline_parser_free(&conf);
close_stat_clients();
+ free(uid_whitelist);
}
/*
exit(0);
}
-static void init_colors_or_die(void)
-{
- int i;
-
- if (!want_colors())
- return;
- daemon_set_default_log_colors();
- daemon_set_flag(DF_COLOR_LOG);
- for (i = 0; i < conf.log_color_given; i++)
- daemon_set_log_color_or_die(conf.log_color_arg[i]);
-}
-
/**
* the main function of para_audiod
*
writer_init();
if (conf.help_given || conf.detailed_help_given)
print_help_and_die();
- drop_privileges_or_die(conf.user_arg, conf.group_arg);
+ daemon_set_priority(conf.priority_arg);
+ daemon_drop_privileges_or_die(conf.user_arg, conf.group_arg);
parse_config_or_die();
- init_colors_or_die();
+ daemon_init_colors_or_die(conf.color_arg, color_arg_auto, color_arg_no,
+ conf.logfile_given, conf.log_color_arg, conf.log_color_given);
init_random_seed_or_die();
daemon_set_flag(DF_LOG_TIME);
daemon_set_flag(DF_LOG_HOSTNAME);
PARA_EMERG_LOG("%s\n", para_strerror(-ret));
exit(EXIT_FAILURE);
}
- log_welcome("para_audiod");
- set_server_start_time(NULL);
+ daemon_log_welcome("audiod");
+ daemon_set_start_time();
set_initial_status();
FOR_EACH_SLOT(i)
clear_slot(i);
if (conf.daemon_given)
daemonize(false /* parent exits immediately */);
- sig_task->task = task_register(&(struct task_info) {
+ signal_task->task = task_register(&(struct task_info) {
.name = "signal",
.pre_select = signal_pre_select,
.post_select = signal_post_select,
- .context = sig_task,
+ .context = signal_task,
}, &sched);
sched.default_timeout.tv_sec = 2;
ret = schedule(&sched);
audiod_cleanup();
sched_shutdown(&sched);
+ signal_shutdown(signal_task);
if (ret < 0)
PARA_EMERG_LOG("%s\n", para_strerror(-ret));
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