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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2021, FUJITSU LIMITED. ALL rights reserved.
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <iniparser.h>
#include <sys/stat.h>
#include <util/parse-configs.h>
#include <util/strbuf.h>
int filter_conf_files(const struct dirent *dir)
{
if (!dir)
return 0;
if (dir->d_type == DT_REG) {
const char *ext = strrchr(dir->d_name, '.');
if ((!ext) || (ext == dir->d_name))
return 0;
if (strcmp(ext, ".conf") == 0)
return 1;
}
return 0;
}
static void set_str_val(const char **value, const char *val)
{
struct strbuf buf = STRBUF_INIT;
size_t len = *value ? strlen(*value) : 0;
if (!val)
return;
if (len) {
strbuf_add(&buf, *value, len);
strbuf_addstr(&buf, " ");
}
strbuf_addstr(&buf, val);
*value = strbuf_detach(&buf, NULL);
}
static const char *search_section_kv(dictionary *d, const struct config *c)
{
int i;
for (i = 0; i < iniparser_getnsec(d); i++) {
const char *cur_sec_full = iniparser_getsecname(d, i);
char *cur_sec = strdup(cur_sec_full);
const char *search_val, *ret_val;
const char *delim = " \t\n\r";
char *save, *cur, *query;
if (!cur_sec)
return NULL;
if (!c->section || !c->search_key || !c->search_val || !c->get_key) {
fprintf(stderr, "warning: malformed config query, skipping\n");
goto out_sec;
}
cur = strtok_r(cur_sec, delim, &save);
if ((cur == NULL) || (strcmp(cur, c->section) != 0))
goto out_sec;
if (asprintf(&query, "%s:%s", cur_sec_full, c->search_key) < 0)
goto out_sec;
search_val = iniparser_getstring(d, query, NULL);
if (!search_val)
goto out_query;
if (strcmp(search_val, c->search_val) != 0)
goto out_query;
/* we're now in a matching section */
free(query);
if (asprintf(&query, "%s:%s", cur_sec_full, c->get_key) < 0)
goto out_sec;
ret_val = iniparser_getstring(d, query, NULL);
free(query);
free(cur_sec);
return ret_val;
out_query:
free(query);
out_sec:
free(cur_sec);
}
return NULL;
}
static int parse_config_file(const char *config_file,
const struct config *configs)
{
dictionary *dic;
if ((configs->type == MONITOR_CALLBACK) &&
(strcmp(config_file, configs->key) == 0))
return configs->callback(configs, configs->key);
dic = iniparser_load(config_file);
if (!dic)
return -errno;
for (; configs->type != CONFIG_END; configs++) {
switch (configs->type) {
case CONFIG_STRING:
set_str_val((const char **)configs->value,
iniparser_getstring(dic,
configs->key, configs->defval));
break;
case CONFIG_SEARCH_SECTION:
set_str_val((const char **)configs->value,
search_section_kv(dic, configs));
case MONITOR_CALLBACK:
case CONFIG_END:
break;
}
}
iniparser_freedict(dic);
return 0;
}
int parse_configs_prefix(const char *config_path, const char *prefix,
const struct config *configs)
{
const char *config_file = NULL;
struct dirent **namelist;
int rc, count;
if (configs->type == MONITOR_CALLBACK)
return parse_config_file(config_path, configs);
count = scandir(config_path, &namelist, filter_conf_files, alphasort);
if (count == -1)
return -errno;
while (count--) {
char *conf_abspath;
config_file = namelist[count]->d_name;
rc = asprintf(&conf_abspath, "%s/%s", config_path, config_file);
if (rc < 0)
return -ENOMEM;
rc = parse_config_file(conf_abspath, configs);
free(conf_abspath);
if (rc)
return rc;
}
return 0;
}
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