Remove an overambitious sanity check in the fecdec filter.
[paraslash.git] / audiod_command.c
index 3bb94ad..3467dbe 100644 (file)
@@ -1,29 +1,20 @@
 /*
- * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2009 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 "para.h"
+#include <sys/types.h>
+#include <dirent.h>
 
+#include "para.h"
 #include "audiod.cmdline.h"
 #include "list.h"
 #include "close_on_fork.h"
 #include "sched.h"
+#include "ggo.h"
 #include "filter.h"
 #include "grab_client.cmdline.h"
 #include "grab_client.h"
@@ -36,6 +27,9 @@
 #include "fd.h"
 #include "audiod_command_list.h"
 
+extern char *stat_item_values[NUM_STAT_ITEMS];
+
+
 /** iterate over the array of all audiod commands */
 #define FOR_EACH_COMMAND(c) for (c = 0; audiod_cmds[c].name; c++)
 
@@ -45,76 +39,29 @@ static int client_write(int fd, const char *buf)
        return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
 }
 
-static char *get_time_string(struct timeval *newest_stime)
-{
-       struct timeval diff, adj_stream_start, tmp;
-       int total = 0, use_server_time = 1,
-               length_seconds = stat_task->length_seconds;
-
-       if (!stat_task->playing) {
-               if (length_seconds)
-                       return NULL;
-               return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
-       }
-       if (audiod_status == AUDIOD_OFF)
-               goto out;
-       if (stat_task->sa_time_diff_sign > 0)
-               tv_diff(&stat_task->server_stream_start, &stat_task->sa_time_diff,
-                       &adj_stream_start);
-       else
-               tv_add(&stat_task->server_stream_start, &stat_task->sa_time_diff,
-                       &adj_stream_start);
-       tmp = adj_stream_start;
-       if (newest_stime && audiod_status == AUDIOD_ON) {
-               tv_diff(newest_stime, &adj_stream_start, &diff);
-               if (tv2ms(&diff) < 5000) {
-                       tmp = *newest_stime;
-                       use_server_time = 0;
-               }
-       }
-       tv_diff(now, &tmp, &diff);
-       total = diff.tv_sec + stat_task->offset_seconds;
-       if (total > length_seconds)
-               total = length_seconds;
-       if (total < 0)
-               total = 0;
-out:
-       return make_message(
-               "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
-               status_item_list[SI_PLAY_TIME],
-               use_server_time? "~" : "",
-               total / 60,
-               total % 60,
-               (length_seconds - total) / 60,
-               (length_seconds - total) % 60,
-               length_seconds? (total * 100 + length_seconds / 2) /
-                       length_seconds : 0,
-               length_seconds / 60,
-               length_seconds % 60
-       );
-}
-
 __malloc static char *audiod_status_string(void)
 {
        const char *status = (audiod_status == AUDIOD_ON)?
                "on" : (audiod_status == AUDIOD_OFF)? "off": "sb";
-       return make_message("%s:%s\n", status_item_list[SI_AUDIOD_STATUS], status);
+       return make_message("%s: %s\n", status_item_list[SI_AUDIOD_STATUS], status);
 }
 
-static struct timeval *wstime(void)
+static int get_play_time_slot_num(void)
 {
-       int i;
-       struct timeval *max = NULL;
+       int i, oldest = -1;
+
        FOR_EACH_SLOT(i) {
                struct slot_info *s = &slot[i];
                if (!s->wng)
                        continue;
-               if (max && tv_diff(&s->wstime, max, NULL) <= 0)
+               if (oldest >= 0 && tv_diff(&s->wstime, &slot[oldest].wstime,
+                               NULL) > 0)
                        continue;
-               max = &s->wstime;
+               oldest = i;
        }
-       return max;
+       return oldest;
 }
+
 __malloc static char *decoder_flags(void)
 {
        int i;
@@ -130,7 +77,7 @@ __malloc static char *decoder_flags(void)
                flags[i] = flag;
        }
        flags[MAX_STREAM_SLOTS] = '\0';
-       return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
+       return make_message("%s: %s\n", status_item_list[SI_DECODER_FLAGS],
                flags);
 }
 
@@ -236,8 +183,8 @@ int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
        }
        PARA_INFO_LOG("mask: 0x%lx\n", mask);
        if (mask & (1 << SI_PLAY_TIME)) {
-               struct timeval *t = wstime();
-               char *ts = get_time_string(t);
+               int slot_num = get_play_time_slot_num();
+               char *ts = get_time_string(slot_num);
                if (ts) {
                        ret = client_write(fd, ts);
                        if (ret < 0)
@@ -247,7 +194,7 @@ int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
        }
        if (mask & (1 << SI_AUDIOD_UPTIME)) {
                char *tmp, *us = uptime_str();
-               tmp = make_message("%s:%s\n",
+               tmp = make_message("%s: %s\n",
                        status_item_list[SI_AUDIOD_UPTIME], us);
                free(us);
                ret = client_write(fd, tmp);
@@ -263,18 +210,17 @@ int com_stat(int fd, __a_unused int argc, __a_unused char **argv)
                free(s);
        }
        if (mask & (1 << SI_DECODER_FLAGS)) {
-               char *df =decoder_flags();
+               char *df = decoder_flags();
                ret = client_write(fd, df);
                if (ret < 0)
                        goto out;
                free(df);
        }
-
-       for (i = 0; i < NUM_STAT_ITEMS; i++) {
+       FOR_EACH_STATUS_ITEM(i) {
                char *tmp, *v;
                if (!((1 << i) & mask))
                        continue;
-               v = stat_task->stat_item_values[i];
+               v = stat_item_values[i];
                tmp = make_message("%s%s%s", buf? buf: "",
                        v? v : "", v? "\n" : "");
                free(buf);
@@ -290,8 +236,7 @@ out:
 
 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
 {
-       struct filter_node *fn;
-       int i, j;
+       int i;
 
        FOR_EACH_SLOT(i) {
                struct slot_info *s = &slot[i];
@@ -301,14 +246,10 @@ static struct filter_node *find_filter_node(int slot_num, int format, int filter
                        continue;
                if (format >= 0 && s->format != format)
                        continue;
-               if (num_filters(i) < filternum)
+               if (num_filters(i) <= filternum)
                        continue;
                /* success */
-               j = 1;
-               list_for_each_entry(fn, &s->fc->filters, node)
-                       if (filternum <= 0 || j++ == filternum)
-                               break;
-               return fn;
+               return  s->fc->filter_nodes + filternum;
        }
        return NULL;
 }
@@ -350,7 +291,7 @@ err_out:
        return 1;
 }
 
-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");
@@ -406,11 +347,27 @@ static int check_perms(uid_t uid)
        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)
@@ -419,11 +376,11 @@ int handle_connect(int accept_fd)
        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;
        cmd = para_strdup(buf);
        p = strchr(cmd, '\n');
        if (!p)
@@ -455,56 +412,59 @@ out:
        free(buf);
        free(argv);
        if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
-               char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
+               char *tmp = make_message("%s\n", para_strerror(-ret));
                client_write(clifd, tmp);
                free(tmp);
                close(clifd);
        }
        return ret;
 }
-
+/**
+ * send the current audiod status to all connected stat clients
+ */
 void audiod_status_dump(void)
 {
-       struct timeval *t = wstime();
+       int slot_num = get_play_time_slot_num();
        char *old, *new, *tmp;
 
-       old = stat_task->stat_item_values[SI_PLAY_TIME];
-       new = get_time_string(t);
+       old = stat_item_values[SI_PLAY_TIME];
+       new = get_time_string(slot_num);
        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;
+                       stat_item_values[SI_PLAY_TIME] = new;
                } else
                        free(new);
        }
 
        new = uptime_str();
-       old = stat_task->stat_item_values[SI_AUDIOD_UPTIME];
+       old = stat_item_values[SI_AUDIOD_UPTIME];
        if (!old || strcmp(old, new)) {
                free(old);
-               tmp = make_message("%s:%s\n",
+               tmp = make_message("%s: %s\n",
                        status_item_list[SI_AUDIOD_UPTIME], new);
                stat_client_write(tmp, SI_AUDIOD_UPTIME);
                free(tmp);
-               stat_task->stat_item_values[SI_AUDIOD_UPTIME] = new;
+               stat_item_values[SI_AUDIOD_UPTIME] = new;
        } else
                free(new);
 
-       old = stat_task->stat_item_values[SI_AUDIOD_STATUS];
+       old = 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;
+               stat_item_values[SI_AUDIOD_STATUS] = new;
        } else
                free(new);
 
-       old = stat_task->stat_item_values[SI_DECODER_FLAGS];
+       old = 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;
+               stat_item_values[SI_DECODER_FLAGS] = new;
        } else
                free(new);
 }
@@ -519,11 +479,11 @@ void dump_empty_status(void)
 {
        int i;
 
-       FOR_EACH_STAT_ITEM(i) {
+       FOR_EACH_STATUS_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;
+               free(stat_item_values[i]);
+               stat_item_values[i] = NULL;
        }
 }