Fix documentation of select command.
[paraslash.git] / audiod.c
index 9b79121..6fd8eef 100644 (file)
--- a/audiod.c
+++ b/audiod.c
@@ -1,13 +1,15 @@
 /*
- * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
 /** \file audiod.c the paraslash's audio daemon */
+#include <sys/types.h>
+#include <dirent.h>
 
 #include "para.h"
-
+#include "error.h"
 #include "audiod.cmdline.h"
 #include "list.h"
 #include "sched.h"
@@ -24,7 +26,6 @@
 #include "fd.h"
 #include "write.h"
 #include "write_common.h"
-#include "error.h"
 #include "signal.h"
 
 /** define the array of error lists needed by para_audiod */
@@ -32,7 +33,7 @@ INIT_AUDIOD_ERRLISTS;
 /** define the array containing all supported audio formats */
 const char *audio_formats[] = {AUDIOD_AUDIO_FORMAT_ARRAY NULL};
 
-/** defines how to handle one supported audio format */
+/** Defines how audiod handles one supported audio format. */
 struct audio_format_info {
        /** pointer to the receiver for this audio format */
        struct receiver *receiver;
@@ -104,18 +105,6 @@ struct command_task {
        struct task task;
 };
 
-/**
- * task for signal handling
- */
-struct signal_task {
-       /** the signal pipe */
-       int fd;
-       /** the number of the most recent signal */
-       int signum;
-       /** the associated task structure */
-       struct task task;
-};
-
 /** iterate over all supported audio formats */
 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
 
@@ -129,6 +118,9 @@ struct signal_task {
 int get_audio_format_num(char *name)
 {
        int i;
+
+       while (para_isspace(*name))
+               name++;
        FOR_EACH_AUDIO_FORMAT(i)
                if (!strcmp(name, audio_formats[i]))
                        return i;
@@ -152,6 +144,8 @@ void para_log(int ll, const char* fmt,...)
 
        if (ll < conf.loglevel_arg)
                return;
+       if (!logfile && conf.daemon_given)
+               return;
        if (!hostname)
                hostname = para_hostname();
        outfd = logfile? logfile : stderr;
@@ -205,34 +199,34 @@ static void close_receiver(int slot_num)
        if (s->format < 0 || !s->receiver_node)
                return;
        a = &afi[s->format];
-       PARA_NOTICE_LOG("closing %s receiver in slot %d (eof = %d)\n",
-               audio_formats[s->format] , slot_num, s->receiver_node->eof);
+       PARA_NOTICE_LOG("closing %s receiver in slot %d\n",
+               audio_formats[s->format], slot_num);
        a->receiver->close(s->receiver_node);
        free(s->receiver_node);
        s->receiver_node = NULL;
 }
 
-static void kill_all_decoders(void)
+static void kill_all_decoders(int error)
 {
        int i;
 
        FOR_EACH_SLOT(i) {
                struct slot_info *s = &slot[i];
-               if (s->wng && !s->wng->eof) {
+               if (s->wng && !s->wng->error) {
                        PARA_INFO_LOG("unregistering writer node group in slot %d\n",
                                i);
                        wng_unregister(s->wng);
-                       s->wng->eof = 1;
+                       s->wng->error = error;
                }
-               if (s->fc && !s->fc->eof) {
+               if (s->fc && !s->fc->error) {
                        PARA_INFO_LOG("unregistering filter chain in slot %d\n", i);
                        unregister_task(&s->fc->task);
-                       s->fc->eof = 1;
+                       s->fc->error = error;
                }
-               if (s->receiver_node && !s->receiver_node->eof) {
+               if (s->receiver_node && !s->receiver_node->error) {
                        PARA_INFO_LOG("unregistering receiver_node in slot %d\n", i);
                        unregister_task(&s->receiver_node->task);
-                       s->receiver_node->eof = 1;
+                       s->receiver_node->error = error;
                }
        }
 }
@@ -272,9 +266,9 @@ int num_filters(int audio_format_num)
 
 static void filter_event_handler(struct task *t)
 {
-       PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
+       PARA_NOTICE_LOG("%s\n", para_strerror(-t->ret));
        struct filter_chain *fc = t->private_data;
-       fc->eof = 1;
+       fc->error = t->ret;
        unregister_task(t);
 }
 
@@ -293,13 +287,13 @@ static void open_filters(int slot_num)
        INIT_LIST_HEAD(&s->fc->filters);
        s->fc->inbuf = s->receiver_node->buf;
        s->fc->in_loaded = &s->receiver_node->loaded;
-       s->fc->input_eof = &s->receiver_node->eof;
+       s->fc->input_error = &s->receiver_node->error;
        s->fc->task.pre_select = filter_pre_select;
        s->fc->task.event_handler = filter_event_handler;
        s->fc->task.private_data = s->fc;
-       s->fc->eof = 0;
+       s->fc->error = 0;
 
-       s->receiver_node->output_eof = &s->fc->eof;
+       s->receiver_node->output_error = &s->fc->error;
        sprintf(s->fc->task.status, "filter chain");
        for (i = 0; i < nf; i++) {
                struct filter_node *fn = para_calloc(sizeof(struct filter_node));
@@ -322,8 +316,8 @@ static void wng_event_handler(struct task *t)
 {
        struct writer_node_group *wng = t->private_data;
 
-       PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
-       wng->eof = 1;
+       PARA_INFO_LOG("%s\n", para_strerror(-t->ret));
+       wng->error = t->ret;
        wng_unregister(wng);
 }
 
@@ -341,15 +335,15 @@ static void open_writers(int slot_num)
        if (s->fc) {
                s->wng->buf = s->fc->outbuf;
                s->wng->loaded = s->fc->out_loaded;
-               s->wng->input_eof = &s->fc->eof;
+               s->wng->input_error = &s->fc->error;
                s->wng->channels = &s->fc->channels;
                s->wng->samplerate = &s->fc->samplerate;
-               s->fc->output_eof = &s->wng->eof;
+               s->fc->output_error = &s->wng->error;
                PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
        } else {
                s->wng->buf = s->receiver_node->buf;
                s->wng->loaded = &s->receiver_node->loaded;
-               s->wng->input_eof = &s->receiver_node->eof;
+               s->wng->input_error = &s->receiver_node->error;
        }
        s->wng->task.event_handler = wng_event_handler;
        for (i = 0; i < a->num_writers; i++) {
@@ -358,7 +352,7 @@ static void open_writers(int slot_num)
        }
        ret = wng_open(s->wng);
        if (ret < 0) {
-               PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+               PARA_ERROR_LOG("%s\n", para_strerror(-ret));
                return;
        }
        s->wstime = *now;
@@ -368,16 +362,19 @@ static void open_writers(int slot_num)
 static void rn_event_handler(struct task *t)
 {
        struct receiver_node *rn = t->private_data;
-       const struct timeval restart_delay = {0, 10 * 1000};
        int i;
 
-       PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
+       PARA_NOTICE_LOG("%s\n", para_strerror(-t->ret));
        unregister_task(t);
-       rn->eof = 1;
+       rn->error = t->ret;
        /* set restart barrier */
        FOR_EACH_SLOT(i) {
+               struct timeval restart_delay = {0, 10 * 1000};
                if (slot[i].receiver_node != rn)
                        continue;
+               if (rn->error != -E_RECV_EOF)
+                       /* don't reconnect immediately on errors */
+                       restart_delay.tv_sec = 5;
                tv_add(now, &restart_delay, &afi[slot[i].format].restart_barrier);
        }
 }
@@ -416,7 +413,7 @@ static int open_receiver(int format)
        register_task(&rn->task);
        return 1;
 err:
-       PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+       PARA_ERROR_LOG("%s\n", para_strerror(-ret));
        tv_add(now, &restart_delay, &afi[format].restart_barrier);
        return ret;
 }
@@ -428,7 +425,7 @@ static int receiver_running(int format)
        FOR_EACH_SLOT(i) {
                struct slot_info *s = &slot[i];
                if (s->format == format && s->receiver_node
-                               && !s->receiver_node->eof)
+                               && !s->receiver_node->error)
                        return 1;
        }
        return 0;
@@ -436,23 +433,18 @@ static int receiver_running(int format)
 
 static int open_current_receiver(struct sched *s)
 {
-       int i;
        struct timeval diff;
-       char *audio_format = stat_task->stat_item_values[SI_FORMAT];
+       int cafn = stat_task->current_audio_format_num;
 
-       if (!audio_format || !stat_task->pcd)
+       if (cafn < 0 || !stat_task->pcd)
                return 0;
-       i = get_audio_format_num(audio_format + strlen(
-               status_item_list[SI_FORMAT]) + 1);
-       if (i < 0)
+       if (receiver_running(cafn))
                return 0;
-       if (receiver_running(i))
-               return 0;
-       if (tv_diff(now, &afi[i].restart_barrier, &diff) < 0) {
+       if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
                s->timeout = diff;
                return 0;
        }
-       return open_receiver(i) < 0? 0 : 1;
+       return open_receiver(cafn) < 0? 0 : 1;
 }
 
 static unsigned compute_time_diff(const struct timeval *status_time)
@@ -497,7 +489,7 @@ out:
        return count;
 }
 
-static void check_stat_line(char *line)
+static int check_stat_line(char *line, __a_unused void *data)
 {
        int itemnum;
        size_t ilen = 0;
@@ -506,14 +498,14 @@ static void check_stat_line(char *line)
 
 //     PARA_INFO_LOG("line: %s\n", line);
        if (!line)
-               return;
+               return 1;
        itemnum = stat_line_valid(line);
        if (itemnum < 0) {
                PARA_WARNING_LOG("invalid status line: %s\n", line);
-               return;
+               return 1;
        }
        if (stat_task->clock_diff_count && itemnum != SI_CURRENT_TIME)
-               return;
+               return 1;
        tmp = make_message("%s\n", line);
        stat_client_write(tmp, itemnum);
        free(tmp);
@@ -527,7 +519,7 @@ static void check_stat_line(char *line)
        case SI_OFFSET:
                stat_task->offset_seconds = atoi(line + ilen + 1);
                break;
-       case SI_LENGTH:
+       case SI_SECONDS_TOTAL:
                stat_task->length_seconds = atoi(line + ilen + 1);
                break;
        case SI_STREAM_START:
@@ -556,7 +548,11 @@ static void check_stat_line(char *line)
                if (stat_task->clock_diff_count)
                        stat_task->clock_diff_count--;
                break;
+       case SI_FORMAT:
+               stat_task->current_audio_format_num = get_audio_format_num(
+                       line + ilen + 1);
        }
+       return 1;
 }
 
 static void try_to_close_slot(int slot_num)
@@ -565,13 +561,13 @@ static void try_to_close_slot(int slot_num)
 
        if (s->format < 0)
                return;
-       if (s->receiver_node && !s->receiver_node->eof)
+       if (s->receiver_node && !s->receiver_node->error)
                return;
-       if (s->fc && !s->fc->eof)
+       if (s->fc && !s->fc->error)
                return;
-       if (s->wng && !s->wng->eof)
+       if (s->wng && !s->wng->error)
                return;
-       PARA_INFO_LOG("closing slot %d \n", slot_num);
+       PARA_INFO_LOG("closing slot %d\n", slot_num);
        wng_close(s->wng);
        close_filters(s->fc);
        free(s->fc);
@@ -581,7 +577,7 @@ static void try_to_close_slot(int slot_num)
 
 /*
  * Check if any receivers/filters/writers need to be started and do so if
- * neccessary.  Since the pre_select function didn't have a chance yet to put
+ * necessary.  Since the pre_select function didn't have a chance yet to put
  * file descriptors into the fd sets given by s, make the upcoming select()
  * return immediately to avoid a long timeout in case we started something.
  */
@@ -592,7 +588,7 @@ static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
 
        t->ret = 1;
        if (audiod_status != AUDIOD_ON || !stat_task->playing)
-               return kill_all_decoders();
+               return kill_all_decoders(-E_NOT_PLAYING);
        if (open_current_receiver(s))
                s->timeout = min_delay;
        FOR_EACH_SLOT(i) {
@@ -605,6 +601,8 @@ static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
                a = &afi[sl->format];
                if (!sl->receiver_node)
                        continue;
+               if ((!a->num_filters || sl->fc) && sl->wng)
+                       continue; /* everything already started */
                if (!a->num_filters) {
                        if (sl->receiver_node->loaded && !sl->wng) {
                                open_writers(i);
@@ -617,7 +615,7 @@ static void audiod_pre_select(struct sched *s, __a_unused struct task *t)
                        s->timeout = min_delay;
                        continue;
                }
-               if (!sl->fc || !*sl->fc->out_loaded || sl->wng)
+               if (sl->wng || !sl->fc || !*sl->fc->out_loaded)
                        continue;
                if (tv_diff(now, &initial_delay_barrier, &diff) > 0) {
                        open_writers(i);
@@ -850,10 +848,11 @@ static int init_stream_io(void)
        return 1;
 }
 
+/* does not unlink socket on errors */
 static int audiod_get_socket(void)
 {
        struct sockaddr_un unix_addr;
-       int fd;
+       int ret, fd;
 
        if (conf.socket_given)
                socket_name = para_strdup(conf.socket_arg);
@@ -866,18 +865,22 @@ static int audiod_get_socket(void)
        PARA_NOTICE_LOG("local socket: %s\n", socket_name);
        if (conf.force_given)
                unlink(socket_name);
-       fd = create_local_socket(socket_name, &unix_addr,
-                       S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
-       if (fd < 0) {
-               PARA_EMERG_LOG("can not connect to socket\n");
-               exit(EXIT_FAILURE); /* do not unlink socket */
-       }
+       ret = create_local_socket(socket_name, &unix_addr,
+               S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
+       if (ret < 0)
+               goto err;
+       fd = ret;
        if (listen(fd , 5) < 0) {
-               PARA_EMERG_LOG("can not listen on socket\n");
-               exit(EXIT_FAILURE); /* do not unlink socket */
+               ret = -ERRNO_TO_PARA_ERROR(errno);
+               goto err;
        }
-       mark_fd_nonblock(fd);
+       ret = mark_fd_nonblocking(fd);
+       if (ret < 0)
+               goto err;
        return fd;
+err:
+       PARA_EMERG_LOG("%s\n", para_strerror(-ret));
+       exit(EXIT_FAILURE);
 }
 
 static void signal_event_handler(struct task *t)
@@ -937,7 +940,7 @@ static void command_post_select(struct sched *s, struct task *t)
                return;
        ret = handle_connect(ct->fd);
        if (ret < 0)
-               PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+               PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 }
 
 static void init_command_task(struct command_task *ct)
@@ -958,7 +961,7 @@ static void close_stat_pipe(void)
                return;
        client_close(stat_task->pcd);
        stat_task->pcd = NULL;
-       for (i = 0; i < NUM_STAT_ITEMS; i++) {
+       FOR_EACH_STATUS_ITEM(i) {
                free(stat_task->stat_item_values[i]);
                stat_task->stat_item_values[i] = NULL;
        }
@@ -967,11 +970,11 @@ static void close_stat_pipe(void)
        stat_task->offset_seconds = 0;
        audiod_status_dump();
        stat_task->playing = 0;
-       stat_task->stat_item_values[SI_STATUS_BAR] = make_message(
-               "%s:no connection to para_server\n",
-               status_item_list[SI_STATUS_BAR]);
-       stat_client_write(stat_task->stat_item_values[SI_STATUS_BAR],
-               SI_STATUS_BAR);
+       stat_task->stat_item_values[SI_BASENAME] = make_message(
+               "%s: no connection to para_server\n",
+               status_item_list[SI_BASENAME]);
+       stat_client_write(stat_task->stat_item_values[SI_BASENAME],
+               SI_BASENAME);
        if (stat_task->clock_diff_count) {
                stat_task->clock_diff_barrier.tv_sec = now->tv_sec + 1;
                stat_task->clock_diff_barrier.tv_usec = now->tv_usec;
@@ -1068,7 +1071,7 @@ static void status_post_select(__a_unused struct sched *s, struct task *t)
                return;
        }
        bytes_left = for_each_line(st->pcd->buf, st->pcd->loaded,
-               &check_stat_line);
+               &check_stat_line, NULL);
        if (st->pcd->loaded != bytes_left) {
                st->last_status_read = *now;
                st->pcd->loaded = bytes_left;
@@ -1088,6 +1091,7 @@ static void init_status_task(struct status_task *st)
        st->task.private_data = st;
        st->sa_time_diff_sign = 1;
        st->clock_diff_count = conf.clock_diff_count_arg;
+       st->current_audio_format_num = -1;
        sprintf(st->task.status, "status task");
 }
 
@@ -1105,7 +1109,7 @@ static void set_initial_status(void)
                return;
        }
        if (strcmp(conf.mode_arg, "on"))
-               PARA_WARNING_LOG("%s", "invalid mode\n");
+               PARA_WARNING_LOG("invalid mode\n");
 }
 
 /**
@@ -1140,7 +1144,7 @@ int main(int argc, char *argv[])
 
                };
                if (audiod_cmdline_parser_config_file(config_file, &conf, &params)) {
-                       PARA_EMERG_LOG("%s", "parse error in config file\n");
+                       PARA_EMERG_LOG("parse error in config file\n");
                        exit(EXIT_FAILURE);
                }
                free(config_file);
@@ -1150,7 +1154,7 @@ int main(int argc, char *argv[])
        log_welcome("para_audiod", conf.loglevel_arg);
        i = init_stream_io();
        if (i < 0) {
-               PARA_EMERG_LOG("init stream io error: %s\n", PARA_STRERROR(-i));
+               PARA_EMERG_LOG("init stream io error: %s\n", para_strerror(-i));
                exit(EXIT_FAILURE);
        }
        server_uptime(UPTIME_SET);
@@ -1175,8 +1179,8 @@ int main(int argc, char *argv[])
        register_task(audiod_task);
        s.default_timeout.tv_sec = 0;
        s.default_timeout.tv_usec = 99 * 1000;
-       ret = sched(&s);
+       ret = schedule(&s);
 
-       PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
+       PARA_EMERG_LOG("%s\n", para_strerror(-ret));
        return EXIT_FAILURE;
 }