/* * Copyright (C) 2003-2010 The Music Player Daemon Project * 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., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "config.h" #include "conf.h" #include "utils.h" #include "tokenizer.h" #include "path.h" #include "glib_compat.h" #include "mpd_error.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 '#' struct config_entry { const char *const name; const bool repeatable; const bool block; GSList *params; }; static struct config_entry config_entries[] = { { .name = CONF_MUSIC_DIR, false, false }, { .name = CONF_PLAYLIST_DIR, false, false }, { .name = CONF_FOLLOW_INSIDE_SYMLINKS, false, false }, { .name = CONF_FOLLOW_OUTSIDE_SYMLINKS, false, false }, { .name = CONF_DB_FILE, false, false }, { .name = CONF_STICKER_FILE, false, false }, { .name = CONF_LOG_FILE, false, false }, { .name = CONF_PID_FILE, false, false }, { .name = CONF_STATE_FILE, false, false }, { .name = CONF_USER, false, false }, { .name = CONF_GROUP, false, false }, { .name = CONF_BIND_TO_ADDRESS, true, false }, { .name = CONF_PORT, false, false }, { .name = CONF_LOG_LEVEL, false, false }, { .name = CONF_ZEROCONF_NAME, false, false }, { .name = CONF_ZEROCONF_ENABLED, false, false }, { .name = CONF_PASSWORD, true, false }, { .name = CONF_DEFAULT_PERMS, false, false }, { .name = CONF_AUDIO_OUTPUT, true, true }, { .name = CONF_AUDIO_OUTPUT_FORMAT, false, false }, { .name = CONF_MIXER_TYPE, false, false }, { .name = CONF_REPLAYGAIN, false, false }, { .name = CONF_REPLAYGAIN_PREAMP, false, false }, { .name = CONF_REPLAYGAIN_MISSING_PREAMP, false, false }, { .name = CONF_REPLAYGAIN_LIMIT, false, false }, { .name = CONF_VOLUME_NORMALIZATION, false, false }, { .name = CONF_SAMPLERATE_CONVERTER, false, false }, { .name = CONF_AUDIO_BUFFER_SIZE, false, false }, { .name = CONF_BUFFER_BEFORE_PLAY, false, false }, { .name = CONF_HTTP_PROXY_HOST, false, false }, { .name = CONF_HTTP_PROXY_PORT, false, false }, { .name = CONF_HTTP_PROXY_USER, false, false }, { .name = CONF_HTTP_PROXY_PASSWORD, false, false }, { .name = CONF_CONN_TIMEOUT, false, false }, { .name = CONF_MAX_CONN, false, false }, { .name = CONF_MAX_PLAYLIST_LENGTH, false, false }, { .name = CONF_MAX_COMMAND_LIST_SIZE, false, false }, { .name = CONF_MAX_OUTPUT_BUFFER_SIZE, false, false }, { .name = CONF_FS_CHARSET, false, false }, { .name = CONF_ID3V1_ENCODING, false, false }, { .name = CONF_METADATA_TO_USE, false, false }, { .name = CONF_SAVE_ABSOLUTE_PATHS, false, false }, { .name = CONF_DECODER, true, true }, { .name = CONF_INPUT, true, true }, { .name = CONF_GAPLESS_MP3_PLAYBACK, false, false }, { .name = CONF_PLAYLIST_PLUGIN, true, true }, { .name = CONF_AUTO_UPDATE, false, false }, { .name = CONF_AUTO_UPDATE_DEPTH, false, false }, { .name = "filter", true, true }, }; static bool get_bool(const char *value, bool *value_r) { static const char *t[] = { "yes", "true", "1", NULL }; static const char *f[] = { "no", "false", "0", NULL }; if (string_array_contains(t, value)) { *value_r = true; return true; } if (string_array_contains(f, value)) { *value_r = false; return true; } return false; } struct config_param * config_new_param(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; ret->used = false; return ret; } static void config_param_free(struct config_param *param) { g_free(param->value); for (unsigned 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 void config_param_free_callback(gpointer data, G_GNUC_UNUSED gpointer user_data) { struct config_param *param = data; config_param_free(param); } static struct config_entry * config_entry_get(const char *name) { for (unsigned i = 0; i < G_N_ELEMENTS(config_entries); ++i) { struct config_entry *entry = &config_entries[i]; if (strcmp(entry->name, name) == 0) return entry; } return NULL; } void config_global_finish(void) { for (unsigned i = 0; i < G_N_ELEMENTS(config_entries); ++i) { struct config_entry *entry = &config_entries[i]; g_slist_foreach(entry->params, config_param_free_callback, NULL); g_slist_free(entry->params); } } void config_global_init(void) { } static void config_param_check(gpointer data, G_GNUC_UNUSED gpointer user_data) { struct config_param *param = data; if (!param->used) /* this whole config_param was not queried at all - the feature might be disabled at compile time? Silently ignore it here. */ return; for (unsigned i = 0; i < param->num_block_params; i++) { struct block_param *bp = ¶m->block_params[i]; if (!bp->used) g_warning("option '%s' on line %i was not recognized", bp->name, bp->line); } } void config_global_check(void) { for (unsigned i = 0; i < G_N_ELEMENTS(config_entries); ++i) { struct config_entry *entry = &config_entries[i]; g_slist_foreach(entry->params, config_param_check, NULL); } } bool config_add_block_param(struct config_param * param, const char *name, const char *value, int line, GError **error_r) { struct block_param *bp; bp = config_get_block_param(param, name); if (bp != NULL) { g_set_error(error_r, config_quark(), 0, "\"%s\" first defined on line %i, and " "redefined on line %i\n", name, bp->line, line); return false; } param->num_block_params++; param->block_params = g_realloc(param->block_params, param->num_block_params * sizeof(param->block_params[0])); bp = ¶m->block_params[param->num_block_params - 1]; bp->name = g_strdup(name); bp->value = g_strdup(value); bp->line = line; bp->used = false; return true; } static struct config_param * config_read_block(FILE *fp, int *count, char *string, GError **error_r) { struct config_param *ret = config_new_param(NULL, *count); GError *error = NULL; bool success; while (true) { char *line; const char *name, *value; line = fgets(string, MAX_STRING_SIZE, fp); if (line == NULL) { config_param_free(ret); g_set_error(error_r, config_quark(), 0, "Expected '}' before end-of-file"); return NULL; } (*count)++; line = g_strchug(line); if (*line == 0 || *line == CONF_COMMENT) continue; if (*line == '}') { /* end of this block; return from the function (and from this "while" loop) */ line = g_strchug(line + 1); if (*line != 0 && *line != CONF_COMMENT) { config_param_free(ret); g_set_error(error_r, config_quark(), 0, "line %i: Unknown tokens after '}'", *count); return false; } return ret; } /* parse name and value */ name = tokenizer_next_word(&line, &error); if (name == NULL) { assert(*line != 0); config_param_free(ret); g_propagate_prefixed_error(error_r, error, "line %i: ", *count); return NULL; } value = tokenizer_next_string(&line, &error); if (value == NULL) { config_param_free(ret); if (*line == 0) g_set_error(error_r, config_quark(), 0, "line %i: Value missing", *count); else g_propagate_prefixed_error(error_r, error, "line %i: ", *count); return NULL; } if (*line != 0 && *line != CONF_COMMENT) { config_param_free(ret); g_set_error(error_r, config_quark(), 0, "line %i: Unknown tokens after value", *count); return NULL; } success = config_add_block_param(ret, name, value, *count, error_r); if (!success) { config_param_free(ret); return false; } } } bool config_read_file(const char *file, GError **error_r) { FILE *fp; char string[MAX_STRING_SIZE + 1]; int count = 0; struct config_entry *entry; struct config_param *param; g_debug("loading file %s", file); if (!(fp = fopen(file, "r"))) { g_set_error(error_r, config_quark(), errno, "Failed to open %s: %s", file, strerror(errno)); return false; } while (fgets(string, MAX_STRING_SIZE, fp)) { char *line; const char *name, *value; GError *error = NULL; count++; line = g_strchug(string); if (*line == 0 || *line == CONF_COMMENT) continue; /* the first token in each line is the name, followed by either the value or '{' */ name = tokenizer_next_word(&line, &error); if (name == NULL) { assert(*line != 0); g_propagate_prefixed_error(error_r, error, "line %i: ", count); return false; } /* get the definition of that option, and check the "repeatable" flag */ entry = config_entry_get(name); if (entry == NULL) { g_set_error(error_r, config_quark(), 0, "unrecognized parameter in config file at " "line %i: %s\n", count, name); return false; } if (entry->params != NULL && !entry->repeatable) { param = entry->params->data; g_set_error(error_r, config_quark(), 0, "config parameter \"%s\" is first defined " "on line %i and redefined on line %i\n", name, param->line, count); return false; } /* now parse the block or the value */ if (entry->block) { /* it's a block, call config_read_block() */ if (*line != '{') { g_set_error(error_r, config_quark(), 0, "line %i: '{' expected", count); return false; } line = g_strchug(line + 1); if (*line != 0 && *line != CONF_COMMENT) { g_set_error(error_r, config_quark(), 0, "line %i: Unknown tokens after '{'", count); return false; } param = config_read_block(fp, &count, string, error_r); if (param == NULL) return false; } else { /* a string value */ value = tokenizer_next_string(&line, &error); if (value == NULL) { if (*line == 0) g_set_error(error_r, config_quark(), 0, "line %i: Value missing", count); else { g_set_error(error_r, config_quark(), 0, "line %i: %s", count, error->message); g_error_free(error); } return false; } if (*line != 0 && *line != CONF_COMMENT) { g_set_error(error_r, config_quark(), 0, "line %i: Unknown tokens after value", count); return false; } param = config_new_param(value, count); } entry->params = g_slist_append(entry->params, param); } fclose(fp); return true; } 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; param->used = true; 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) MPD_ERROR("error parsing \"%s\" at line %i\n", name, param->line); g_free(param->value); return param->value = path; } unsigned config_get_unsigned(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 || value < 0) MPD_ERROR("Not a valid non-negative number in line %i", param->line); return (unsigned)value; } 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) MPD_ERROR("Not a valid number in line %i", param->line); if (value <= 0) MPD_ERROR("Not a positive number in line %i", param->line); return (unsigned)value; } struct block_param * config_get_block_param(const struct config_param * param, const char *name) { if (param == NULL) return NULL; for (unsigned i = 0; i < param->num_block_params; i++) { if (0 == strcmp(name, param->block_params[i].name)) { struct block_param *bp = ¶m->block_params[i]; bp->used = true; return bp; } } return NULL; } bool config_get_bool(const char *name, bool default_value) { const struct config_param *param = config_get_param(name); bool success, value; if (param == NULL) return default_value; success = get_bool(param->value, &value); if (!success) MPD_ERROR("%s is not a boolean value (yes, true, 1) or " "(no, false, 0) on line %i\n", name, param->line); return value; } const char * config_get_block_string(const struct config_param *param, const char *name, const char *default_value) { struct block_param *bp = config_get_block_param(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 = config_get_block_param(param, name); long value; char *endptr; if (bp == NULL) return default_value; value = strtol(bp->value, &endptr, 0); if (*endptr != 0) MPD_ERROR("Not a valid number in line %i", bp->line); if (value < 0) MPD_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 = config_get_block_param(param, name); bool success, value; if (bp == NULL) return default_value; success = get_bool(bp->value, &value); if (!success) MPD_ERROR("%s is not a boolean value (yes, true, 1) or " "(no, false, 0) on line %i\n", name, bp->line); return value; }