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/*
* config.c - parsing of the configuration file
* Copyright (C) 2014-2019 Vivien Didelot
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <limits.h>
#include <stdbool.h>
#include <stdlib.h>
#include "config.h"
#include "ini.h"
#include "log.h"
#include "map.h"
#include "sys.h"
#ifndef SYSCONFDIR
#define SYSCONFDIR "/etc"
#endif
struct config {
struct map *section;
struct map *global;
config_cb_t *cb;
void *data;
};
static int config_finalize(struct config *conf)
{
int err;
if (conf->section) {
if (conf->cb) {
err = conf->cb(conf->section, conf->data);
if (err)
return err;
}
conf->section = NULL;
}
return 0;
}
static int config_reset(struct config *conf)
{
conf->section = map_create();
if (!conf->section)
return -ENOMEM;
if (conf->global)
return map_copy(conf->section, conf->global);
return 0;
}
static int config_set(struct config *conf, const char *key, const char *value)
{
struct map *map = conf->section;
if (!map) {
if (!conf->global) {
conf->global = map_create();
if (!conf->global)
return -ENOMEM;
}
map = conf->global;
}
return map_set(map, key, value);
}
static int config_ini_section_cb(char *section, void *data)
{
int err;
err = config_finalize(data);
if (err)
return err;
err = config_reset(data);
if (err)
return err;
return config_set(data, "name", section);
}
static int config_ini_property_cb(char *key, char *value, void *data)
{
return config_set(data, key, value);
}
static int config_read(struct config *conf, int fd)
{
int err;
err = ini_read(fd, -1, config_ini_section_cb, config_ini_property_cb,
conf);
if (err && err != -EAGAIN)
return err;
return config_finalize(conf);
}
static int config_open(struct config *conf, const char *path)
{
size_t plen = strlen(path);
char pname[plen + 1];
char *dname;
int err;
int fd;
debug("try file %s", path);
err = sys_open(path, &fd);
if (err)
return err;
strcpy(pname, path);
dname = dirname(pname);
err = sys_chdir(dname);
if (err) {
error("failed to change directory to %s", dname);
return err;
}
debug("changed directory to %s", dname);
err = config_read(conf, fd);
sys_close(fd);
if (conf->global)
map_destroy(conf->global);
return err;
}
int config_load(const char *path, config_cb_t *cb, void *data)
{
const char * const home = sys_getenv("HOME");
const char * const xdg_home = sys_getenv("XDG_CONFIG_HOME");
const char * const xdg_dirs = sys_getenv("XDG_CONFIG_DIRS");
struct config conf = {
.data = data,
.cb = cb,
};
char buf[PATH_MAX];
int err;
/* command line config file? */
if (path)
return config_open(&conf, path);
/* user config file? */
if (home) {
if (xdg_home)
snprintf(buf, sizeof(buf), "%s/i3blocks/config", xdg_home);
else
snprintf(buf, sizeof(buf), "%s/.config/i3blocks/config", home);
err = config_open(&conf, buf);
if (err != -ENOENT)
return err;
snprintf(buf, sizeof(buf), "%s/.i3blocks.conf", home);
err = config_open(&conf, buf);
if (err != -ENOENT)
return err;
}
/* system config file? */
if (xdg_dirs)
snprintf(buf, sizeof(buf), "%s/i3blocks/config", xdg_dirs);
else
snprintf(buf, sizeof(buf), "%s/xdg/i3blocks/config", SYSCONFDIR);
err = config_open(&conf, buf);
if (err != -ENOENT)
return err;
snprintf(buf, sizeof(buf), "%s/i3blocks.conf", SYSCONFDIR);
return config_open(&conf, buf);
}
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