98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
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/* ----------------------------------------------------------------------------
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libconfig - A library for processing structured configuration files
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Copyright (C) 2005-2018 Mark A Lindner
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This file is part of libconfig.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License
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as published by the Free Software Foundation; either version 2.1 of
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the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, see
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<http://www.gnu.org/licenses/>.
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----------------------------------------------------------------------------
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <libconfig.h>
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/* This example reads the configuration file 'example.cfg', adds a new
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* movie record to the movies list, and writes the updated configuration to
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* 'updated.cfg'.
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*/
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int main(int argc, char **argv)
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{
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static const char *output_file = "updated.cfg";
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config_t cfg;
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config_setting_t *root, *setting, *movie;
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config_init(&cfg);
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config_set_options(&cfg,
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(CONFIG_OPTION_FSYNC
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| CONFIG_OPTION_SEMICOLON_SEPARATORS
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| CONFIG_OPTION_COLON_ASSIGNMENT_FOR_GROUPS
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| CONFIG_OPTION_OPEN_BRACE_ON_SEPARATE_LINE));
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/* Read the file. If there is an error, report it and exit. */
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if(! config_read_file(&cfg, "example.cfg"))
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{
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fprintf(stderr, "%s:%d - %s\n", config_error_file(&cfg),
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config_error_line(&cfg), config_error_text(&cfg));
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config_destroy(&cfg);
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return(EXIT_FAILURE);
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}
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/* Find the 'movies' setting. Add intermediate settings if they don't yet
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* exist.
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*/
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root = config_root_setting(&cfg);
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setting = config_setting_get_member(root, "inventory");
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if(!setting)
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setting = config_setting_add(root, "inventory", CONFIG_TYPE_GROUP);
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setting = config_setting_get_member(setting, "movies");
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if(!setting)
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setting = config_setting_add(setting, "movies", CONFIG_TYPE_LIST);
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/* Create the new movie entry. */
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movie = config_setting_add(setting, NULL, CONFIG_TYPE_GROUP);
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setting = config_setting_add(movie, "title", CONFIG_TYPE_STRING);
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config_setting_set_string(setting, "Buckaroo Banzai");
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setting = config_setting_add(movie, "media", CONFIG_TYPE_STRING);
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config_setting_set_string(setting, "DVD");
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setting = config_setting_add(movie, "price", CONFIG_TYPE_FLOAT);
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config_setting_set_float(setting, 12.99);
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setting = config_setting_add(movie, "qty", CONFIG_TYPE_INT);
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config_setting_set_float(setting, 20);
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/* Write out the updated configuration. */
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if(! config_write_file(&cfg, output_file))
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{
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fprintf(stderr, "Error while writing file.\n");
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config_destroy(&cfg);
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return(EXIT_FAILURE);
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}
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fprintf(stderr, "Updated configuration successfully written to: %s\n",
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output_file);
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config_destroy(&cfg);
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return(EXIT_SUCCESS);
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}
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/* eof */
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