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cfb350f4f0
mpd/src/conf.c
Max Kellermann cfb350f4f0 input: pass config_param to input_plugin.init() 
Allow input plugins to configure with an "input" block in mpd.conf.
Also allow the user to disable a plugin completely.
2009-03-02 23:08:17 +01:00

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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.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 02111-1307 USA
*/
#include "conf.h"
#include "utils.h"
#include "buffer2array.h"
#include "path.h"
#include <glib.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "config"
#define MAX_STRING_SIZE MPD_PATH_MAX+80
#define CONF_COMMENT '#'
#define CONF_BLOCK_BEGIN "{"
#define CONF_BLOCK_END "}"
#define CONF_REPEATABLE_MASK 0x01
#define CONF_BLOCK_MASK 0x02
#define CONF_LINE_TOKEN_MAX 3
struct config_entry {
const char *name;
unsigned char mask;
GSList *params;
};
static GSList *config_entries;
static int get_bool(const char *value)
{
const char **x;
static const char *t[] = { "yes", "true", "1", NULL };
static const char *f[] = { "no", "false", "0", NULL };
for (x = t; *x; x++) {
if (!strcasecmp(*x, value))
return 1;
}
for (x = f; *x; x++) {
if (!strcasecmp(*x, value))
return 0;
}
return CONF_BOOL_INVALID;
}
struct config_param *
newConfigParam(const char *value, int line)
{
struct config_param *ret = g_new(struct config_param, 1);
if (!value)
ret->value = NULL;
else
ret->value = g_strdup(value);
ret->line = line;
ret->num_block_params = 0;
ret->block_params = NULL;
return ret;
}
void
config_param_free(gpointer data, G_GNUC_UNUSED gpointer user_data)
{
struct config_param *param = data;
int i;
g_free(param->value);
for (i = 0; i < param->num_block_params; i++) {
g_free(param->block_params[i].name);
g_free(param->block_params[i].value);
}
if (param->num_block_params)
g_free(param->block_params);
g_free(param);
}
static struct config_entry *
newConfigEntry(const char *name, int repeatable, int block)
{
struct config_entry *ret = g_new(struct config_entry, 1);
ret->name = name;
ret->mask = 0;
ret->params = NULL;
if (repeatable)
ret->mask |= CONF_REPEATABLE_MASK;
if (block)
ret->mask |= CONF_BLOCK_MASK;
return ret;
}
static void
config_entry_free(gpointer data, G_GNUC_UNUSED gpointer user_data)
{
struct config_entry *entry = data;
g_slist_foreach(entry->params, config_param_free, NULL);
g_slist_free(entry->params);
g_free(entry);
}
static struct config_entry *
config_entry_get(const char *name)
{
GSList *list;
for (list = config_entries; list != NULL;
list = g_slist_next(list)) {
struct config_entry *entry = list->data;
if (strcmp(entry->name, name) == 0)
return entry;
}
return NULL;
}
static void registerConfigParam(const char *name, int repeatable, int block)
{
struct config_entry *entry;
entry = config_entry_get(name);
if (entry != NULL)
g_error("config parameter \"%s\" already registered\n", name);
entry = newConfigEntry(name, repeatable, block);
config_entries = g_slist_prepend(config_entries, entry);
}
void config_global_finish(void)
{
g_slist_foreach(config_entries, config_entry_free, NULL);
g_slist_free(config_entries);
}
void config_global_init(void)
{
config_entries = NULL;
/* registerConfigParam(name, repeatable, block); */
registerConfigParam(CONF_MUSIC_DIR, 0, 0);
registerConfigParam(CONF_PLAYLIST_DIR, 0, 0);
registerConfigParam(CONF_FOLLOW_INSIDE_SYMLINKS, 0, 0);
registerConfigParam(CONF_FOLLOW_OUTSIDE_SYMLINKS, 0, 0);
registerConfigParam(CONF_DB_FILE, 0, 0);
registerConfigParam(CONF_STICKER_FILE, false, false);
registerConfigParam(CONF_LOG_FILE, 0, 0);
registerConfigParam(CONF_ERROR_FILE, 0, 0);
registerConfigParam(CONF_PID_FILE, 0, 0);
registerConfigParam(CONF_STATE_FILE, 0, 0);
registerConfigParam(CONF_USER, 0, 0);
registerConfigParam(CONF_BIND_TO_ADDRESS, 1, 0);
registerConfigParam(CONF_PORT, 0, 0);
registerConfigParam(CONF_LOG_LEVEL, 0, 0);
registerConfigParam(CONF_ZEROCONF_NAME, 0, 0);
registerConfigParam(CONF_ZEROCONF_ENABLED, 0, 0);
registerConfigParam(CONF_PASSWORD, 1, 0);
registerConfigParam(CONF_DEFAULT_PERMS, 0, 0);
registerConfigParam(CONF_AUDIO_OUTPUT, 1, 1);
registerConfigParam(CONF_AUDIO_OUTPUT_FORMAT, 0, 0);
registerConfigParam(CONF_MIXER_TYPE, 0, 0);
registerConfigParam(CONF_MIXER_DEVICE, 0, 0);
registerConfigParam(CONF_MIXER_CONTROL, 0, 0);
registerConfigParam(CONF_REPLAYGAIN, 0, 0);
registerConfigParam(CONF_REPLAYGAIN_PREAMP, 0, 0);
registerConfigParam(CONF_VOLUME_NORMALIZATION, 0, 0);
registerConfigParam(CONF_SAMPLERATE_CONVERTER, 0, 0);
registerConfigParam(CONF_AUDIO_BUFFER_SIZE, 0, 0);
registerConfigParam(CONF_BUFFER_BEFORE_PLAY, 0, 0);
registerConfigParam(CONF_HTTP_PROXY_HOST, 0, 0);
registerConfigParam(CONF_HTTP_PROXY_PORT, 0, 0);
registerConfigParam(CONF_HTTP_PROXY_USER, 0, 0);
registerConfigParam(CONF_HTTP_PROXY_PASSWORD, 0, 0);
registerConfigParam(CONF_CONN_TIMEOUT, 0, 0);
registerConfigParam(CONF_MAX_CONN, 0, 0);
registerConfigParam(CONF_MAX_PLAYLIST_LENGTH, 0, 0);
registerConfigParam(CONF_MAX_COMMAND_LIST_SIZE, 0, 0);
registerConfigParam(CONF_MAX_OUTPUT_BUFFER_SIZE, 0, 0);
registerConfigParam(CONF_FS_CHARSET, 0, 0);
registerConfigParam(CONF_ID3V1_ENCODING, 0, 0);
registerConfigParam(CONF_METADATA_TO_USE, 0, 0);
registerConfigParam(CONF_SAVE_ABSOLUTE_PATHS, 0, 0);
registerConfigParam(CONF_DECODER, true, true);
registerConfigParam(CONF_INPUT, true, true);
registerConfigParam(CONF_GAPLESS_MP3_PLAYBACK, 0, 0);
}
void
addBlockParam(struct config_param * param, const char *name, const char *value,
int line)
{
struct block_param *bp;
param->num_block_params++;
param->block_params = g_realloc(param->block_params,
param->num_block_params *
sizeof(param->block_params[0]));
bp = &param->block_params[param->num_block_params - 1];
bp->name = g_strdup(name);
bp->value = g_strdup(value);
bp->line = line;
}
static struct config_param *
config_read_fileigBlock(FILE * fp, int *count, char *string)
{
struct config_param *ret = newConfigParam(NULL, *count);
int i;
int numberOfArgs;
int argsMinusComment;
while (fgets(string, MAX_STRING_SIZE, fp)) {
char *array[CONF_LINE_TOKEN_MAX] = { NULL };
(*count)++;
numberOfArgs = buffer2array(string, array, CONF_LINE_TOKEN_MAX);
for (i = 0; i < numberOfArgs; i++) {
if (array[i][0] == CONF_COMMENT)
break;
}
argsMinusComment = i;
if (0 == argsMinusComment) {
continue;
}
if (1 == argsMinusComment &&
0 == strcmp(array[0], CONF_BLOCK_END)) {
break;
}
if (2 != argsMinusComment) {
g_error("improperly formatted config file at line %i:"
" %s\n", *count, string);
}
if (0 == strcmp(array[0], CONF_BLOCK_BEGIN) ||
0 == strcmp(array[1], CONF_BLOCK_BEGIN) ||
0 == strcmp(array[0], CONF_BLOCK_END) ||
0 == strcmp(array[1], CONF_BLOCK_END)) {
g_error("improperly formatted config file at line %i: %s "
"in block beginning at line %i\n",
*count, string, ret->line);
}
addBlockParam(ret, array[0], array[1], *count);
}
return ret;
}
void config_read_file(const char *file)
{
FILE *fp;
char string[MAX_STRING_SIZE + 1];
int i;
int numberOfArgs;
int argsMinusComment;
int count = 0;
struct config_entry *entry;
struct config_param *param;
g_debug("loading file %s", file);
if (!(fp = fopen(file, "r"))) {
g_error("problems opening file %s for reading: %s\n",
file, strerror(errno));
}
while (fgets(string, MAX_STRING_SIZE, fp)) {
char *array[CONF_LINE_TOKEN_MAX] = { NULL };
count++;
numberOfArgs = buffer2array(string, array, CONF_LINE_TOKEN_MAX);
for (i = 0; i < numberOfArgs; i++) {
if (array[i][0] == CONF_COMMENT)
break;
}
argsMinusComment = i;
if (0 == argsMinusComment) {
continue;
}
if (2 != argsMinusComment) {
g_error("improperly formatted config file at line %i:"
" %s\n", count, string);
}
entry = config_entry_get(array[0]);
if (entry == NULL)
g_error("unrecognized parameter in config file at "
"line %i: %s\n", count, string);
if (!(entry->mask & CONF_REPEATABLE_MASK) &&
entry->params != NULL) {
param = entry->params->data;
g_error("config parameter \"%s\" is first defined on "
"line %i and redefined on line %i\n",
array[0], param->line, count);
}
if (entry->mask & CONF_BLOCK_MASK) {
if (0 != strcmp(array[1], CONF_BLOCK_BEGIN)) {
g_error("improperly formatted config file at "
"line %i: %s\n", count, string);
}
param = config_read_fileigBlock(fp, &count, string);
} else
param = newConfigParam(array[1], count);
entry->params = g_slist_append(entry->params, param);
}
fclose(fp);
}
void
config_add_param(const char *name, struct config_param *param)
{
struct config_entry *entry = config_entry_get(name);
assert(entry != NULL);
entry->params = g_slist_append(entry->params, param);
}
struct config_param *
config_get_next_param(const char *name, const struct config_param * last)
{
struct config_entry *entry;
GSList *node;
struct config_param *param;
entry = config_entry_get(name);
if (entry == NULL)
return NULL;
node = entry->params;
if (last) {
node = g_slist_find(node, last);
if (node == NULL)
return NULL;
node = g_slist_next(node);
}
if (node == NULL)
return NULL;
param = node->data;
return param;
}
const char *
config_get_string(const char *name, const char *default_value)
{
const struct config_param *param = config_get_param(name);
if (param == NULL)
return default_value;
return param->value;
}
const char *
config_get_path(const char *name)
{
struct config_param *param = config_get_param(name);
char *path;
if (param == NULL)
return NULL;
path = parsePath(param->value);
if (path == NULL)
g_error("error parsing \"%s\" at line %i\n",
name, param->line);
g_free(param->value);
return param->value = path;
}
unsigned
config_get_positive(const char *name, unsigned default_value)
{
const struct config_param *param = config_get_param(name);
long value;
char *endptr;
if (param == NULL)
return default_value;
value = strtol(param->value, &endptr, 0);
if (*endptr != 0)
g_error("Not a valid number in line %i", param->line);
if (value <= 0)
g_error("Not a positive number in line %i", param->line);
return (unsigned)value;
}
struct block_param *
getBlockParam(const struct config_param * param, const char *name)
{
struct block_param *ret = NULL;
int i;
if (param == NULL)
return NULL;
for (i = 0; i < param->num_block_params; i++) {
if (0 == strcmp(name, param->block_params[i].name)) {
if (ret) {
g_warning("\"%s\" first defined on line %i, and "
"redefined on line %i\n", name,
ret->line, param->block_params[i].line);
}
ret = param->block_params + i;
}
}
return ret;
}
bool config_get_bool(const char *name, bool default_value)
{
const struct config_param *param = config_get_param(name);
int value;
if (param == NULL)
return default_value;
value = get_bool(param->value);
if (value == CONF_BOOL_INVALID)
g_error("%s is not a boolean value (yes, true, 1) or "
"(no, false, 0) on line %i\n",
name, param->line);
if (value == CONF_BOOL_UNSET)
return default_value;
return !!value;
}
const char *
config_get_block_string(const struct config_param *param, const char *name,
const char *default_value)
{
struct block_param *bp = getBlockParam(param, name);
if (bp == NULL)
return default_value;
return bp->value;
}
unsigned
config_get_block_unsigned(const struct config_param *param, const char *name,
unsigned default_value)
{
struct block_param *bp = getBlockParam(param, name);
long value;
char *endptr;
if (bp == NULL)
return default_value;
value = strtol(bp->value, &endptr, 0);
if (*endptr != 0)
g_error("Not a valid number in line %i", bp->line);
if (value < 0)
g_error("Not a positive number in line %i", bp->line);
return (unsigned)value;
}
bool
config_get_block_bool(const struct config_param *param, const char *name,
bool default_value)
{
struct block_param *bp = getBlockParam(param, name);
int value;
if (bp == NULL)
return default_value;
value = get_bool(bp->value);
if (value == CONF_BOOL_INVALID)
g_error("%s is not a boolean value (yes, true, 1) or "
"(no, false, 0) on line %i\n",
name, bp->line);
if (value == CONF_BOOL_UNSET)
return default_value;
return !!value;
}
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