sss_ini.c revision a5f79cce8abc74beec0c27c477c046bb6cbe7101
/*
SSSD
sss_ini.c
Authors:
Ondrej Kos <okos@redhat.com>
Copyright (C) 2013 Red Hat
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 <stdio.h>
#include <errno.h>
#include <talloc.h>
#include "config.h"
#include "util/util.h"
#include "util/sss_ini.h"
#include "confdb/confdb_setup.h"
#include "confdb/confdb_private.h"
#ifdef HAVE_LIBINI_CONFIG_V1
#include "ini_configobj.h"
#elif defined(HAVE_LIBINI_CONFIG_V0)
#include "collection.h"
#include "collection_tools.h"
#else
#error "Unsupported libini version"
#endif
#include "ini_config.h"
#ifdef HAVE_LIBINI_CONFIG_V1
struct sss_ini_initdata {
char **error_list;
struct ini_cfgobj *sssd_config;
struct value_obj *obj;
const struct stat *cstat;
struct ini_cfgfile *file;
};
#define sss_ini_get_sec_list ini_get_section_list
#define sss_ini_get_attr_list ini_get_attribute_list
#define sss_ini_get_const_string_config_value ini_get_const_string_config_value
#define sss_ini_get_config_obj ini_get_config_valueobj
#elif defined(HAVE_LIBINI_CONFIG_V0)
struct sss_ini_initdata {
struct collection_item *error_list;
struct collection_item *sssd_config;
struct collection_item *obj;
struct stat cstat;
int file;
};
#define sss_ini_get_sec_list get_section_list
#define sss_ini_get_attr_list get_attribute_list
#define sss_ini_get_const_string_config_value get_const_string_config_value
#define sss_ini_get_config_obj(secs,attrs,cfg,flag,attr) \
get_config_item(secs,attrs,cfg,attr)
#endif
/* Initialize data structure */
struct sss_ini_initdata* sss_ini_initdata_init(TALLOC_CTX *mem_ctx)
{
return talloc_zero(mem_ctx, struct sss_ini_initdata);
}
/* Close file descriptor */
void sss_ini_close_file(struct sss_ini_initdata *init_data)
{
if (init_data == NULL) return;
#ifdef HAVE_LIBINI_CONFIG_V1
if (init_data->file != NULL) {
ini_config_file_destroy(init_data->file);
init_data->file = NULL;
}
#elif defined(HAVE_LIBINI_CONFIG_V0)
if (init_data->file != -1) {
close(init_data->file);
init_data->file = -1;
}
#endif
}
/* Open configuration file */
int sss_ini_config_file_open(struct sss_ini_initdata *init_data,
const char *config_file)
{
#ifdef HAVE_LIBINI_CONFIG_V1
return ini_config_file_open(config_file,
INI_META_STATS,
&init_data->file);
#elif defined(HAVE_LIBINI_CONFIG_V0)
return check_and_open_readonly(config_file, &init_data->file, 0, 0,
S_IFREG|S_IRUSR, /* f r**------ */
S_IFMT|(ALLPERMS & ~(S_IWUSR|S_IXUSR)));
#endif
}
/* Check configuration file permissions */
int sss_ini_config_access_check(struct sss_ini_initdata *init_data)
{
#ifdef HAVE_LIBINI_CONFIG_V1
return ini_config_access_check(init_data->file,
INI_ACCESS_CHECK_MODE |
INI_ACCESS_CHECK_UID |
INI_ACCESS_CHECK_GID,
0, /* owned by root */
0, /* owned by root */
S_IRUSR, /* r**------ */
ALLPERMS & ~(S_IWUSR|S_IXUSR));
#elif defined(HAVE_LIBINI_CONFIG_V0)
return EOK;
#endif
}
/* Get cstat */
int sss_ini_get_stat(struct sss_ini_initdata *init_data)
{
#ifdef HAVE_LIBINI_CONFIG_V1
init_data->cstat = ini_config_get_stat(init_data->file);
if (!init_data->cstat) return EIO;
return EOK;
#elif defined(HAVE_LIBINI_CONFIG_V0)
return fstat(init_data->file, &init_data->cstat);
#endif
}
/* Get mtime */
int sss_ini_get_mtime(struct sss_ini_initdata *init_data,
size_t timestr_len,
char *timestr)
{
#ifdef HAVE_LIBINI_CONFIG_V1
return snprintf(timestr, timestr_len, "%llu",
(long long unsigned)init_data->cstat->st_mtime);
#elif defined(HAVE_LIBINI_CONFIG_V0)
return snprintf(timestr, timestr_len, "%llu",
(long long unsigned)init_data->cstat.st_mtime);
#endif
}
/* Print ini_config errors */
void sss_ini_config_print_errors(char **error_list)
{
#ifdef HAVE_LIBINI_CONFIG_V1
unsigned count = 0;
if (!error_list) {
return;
}
while (error_list[count]) {
DEBUG(SSSDBG_CRIT_FAILURE, "%s\n", error_list[count]);
count++;
}
#endif
return;
}
/* Load configuration */
int sss_ini_get_config(struct sss_ini_initdata *init_data,
const char *config_file)
{
int ret;
#ifdef HAVE_LIBINI_CONFIG_V1
/* Create config object */
ret = ini_config_create(&(init_data->sssd_config));
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Failed to create config object. Error %d.\n", ret);
return ret;
}
/* Parse file */
ret = ini_config_parse(init_data->file,
INI_STOP_ON_ANY,
INI_MV1S_OVERWRITE,
INI_PARSE_NOWRAP,
init_data->sssd_config);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Failed to parse configuration. Error %d.\n", ret);
if (ini_config_error_count(init_data->sssd_config)) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Errors detected while parsing: %s\n",
ini_config_get_filename(init_data->file));
ini_config_get_errors(init_data->sssd_config,
&init_data->error_list);
sss_ini_config_print_errors(init_data->error_list);
ini_config_free_errors(init_data->error_list);
}
ini_config_destroy(init_data->sssd_config);
init_data->sssd_config = NULL;
return ret;
}
return ret;
#elif defined(HAVE_LIBINI_CONFIG_V0)
/* Read the configuration into a collection */
ret = config_from_fd("sssd",
init_data->file,
config_file,
&init_data->sssd_config,
INI_STOP_ON_ANY,
&init_data->error_list);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Parse error reading configuration file [%s]\n",
config_file);
print_file_parsing_errors(stderr, init_data->error_list);
free_ini_config_errors(init_data->error_list);
free_ini_config(init_data->sssd_config);
return ret;
}
return EOK;
#endif
}
/* Get configuration object */
int sss_ini_get_cfgobj(struct sss_ini_initdata *init_data,
const char *section, const char *name)
{
return sss_ini_get_config_obj(section,name, init_data->sssd_config,
INI_GET_FIRST_VALUE, &init_data->obj);
}
/* Check configuration object */
int sss_ini_check_config_obj(struct sss_ini_initdata *init_data)
{
if (init_data->obj == NULL) {
return ENOENT;
}
return EOK;
}
/* Get integer value */
int sss_ini_get_int_config_value(struct sss_ini_initdata *init_data,
int strict, int def, int *error)
{
#ifdef HAVE_LIBINI_CONFIG_V1
return ini_get_int_config_value(init_data->obj, strict, def, error);
#elif defined(HAVE_LIBINI_CONFIG_V0)
return get_int_config_value(init_data->obj, strict, def, error);
#endif
}
/* Destroy ini config (v1) */
void sss_ini_config_destroy(struct sss_ini_initdata *init_data)
{
if (init_data == NULL) return;
#ifdef HAVE_LIBINI_CONFIG_V1
if (init_data->sssd_config != NULL) {
ini_config_destroy(init_data->sssd_config);
init_data->sssd_config = NULL;
}
#elif defined(HAVE_LIBINI_CONFIG_V0)
free_ini_config(init_data->sssd_config);
#endif
}
/* Create LDIF */
int sss_confdb_create_ldif(TALLOC_CTX *mem_ctx,
struct sss_ini_initdata *init_data,
const char **config_ldif)
{
int ret, i, j;
char *ldif;
char *tmp_ldif;
char **sections;
int section_count;
char *dn;
char *tmp_dn;
char *sec_dn;
char **attrs;
int attr_count;
char *ldif_attr;
TALLOC_CTX *tmp_ctx;
size_t dn_size;
size_t ldif_len;
size_t attr_len;
#ifdef HAVE_LIBINI_CONFIG_V1
struct value_obj *obj = NULL;
#elif defined(HAVE_LIBINI_CONFIG_V0)
struct collection_item *obj = NULL;
#endif
ldif_len = strlen(CONFDB_INTERNAL_LDIF);
ldif = talloc_array(mem_ctx, char, ldif_len+1);
if (!ldif) return ENOMEM;
tmp_ctx = talloc_new(ldif);
if (!tmp_ctx) {
ret = ENOMEM;
goto error;
}
memcpy(ldif, CONFDB_INTERNAL_LDIF, ldif_len);
/* Read in the collection and convert it to an LDIF */
/* Get the list of sections */
sections = sss_ini_get_sec_list(init_data->sssd_config,
&section_count, &ret);
if (ret != EOK) {
goto error;
}
for (i = 0; i < section_count; i++) {
const char *rdn = NULL;
DEBUG(SSSDBG_TRACE_FUNC,
"Processing config section [%s]\n", sections[i]);
ret = parse_section(tmp_ctx, sections[i], &sec_dn, &rdn);
if (ret != EOK) {
goto error;
}
dn = talloc_asprintf(tmp_ctx,
"dn: %s,cn=config\n"
"cn: %s\n",
sec_dn, rdn);
if (!dn) {
ret = ENOMEM;
free_section_list(sections);
goto error;
}
dn_size = strlen(dn);
/* Get all of the attributes and their values as LDIF */
attrs = sss_ini_get_attr_list(init_data->sssd_config, sections[i],
&attr_count, &ret);
if (ret != EOK) {
free_section_list(sections);
goto error;
}
for (j = 0; j < attr_count; j++) {
DEBUG(SSSDBG_TRACE_FUNC,
"Processing attribute [%s]\n", attrs[j]);
ret = sss_ini_get_config_obj(sections[i], attrs[j],
init_data->sssd_config,
INI_GET_FIRST_VALUE, &obj);
if (ret != EOK) goto error;
const char *value = sss_ini_get_const_string_config_value(obj, &ret);
if (ret != EOK) goto error;
if (value && value[0] == '\0') {
DEBUG(SSSDBG_CRIT_FAILURE,
"Attribute '%s' has empty value, ignoring\n",
attrs[j]);
continue;
}
ldif_attr = talloc_asprintf(tmp_ctx,
"%s: %s\n", attrs[j], value);
DEBUG(SSSDBG_TRACE_ALL, "%s", ldif_attr);
attr_len = strlen(ldif_attr);
tmp_dn = talloc_realloc(tmp_ctx, dn, char,
dn_size+attr_len+1);
if (!tmp_dn) {
ret = ENOMEM;
free_attribute_list(attrs);
free_section_list(sections);
goto error;
}
dn = tmp_dn;
memcpy(dn+dn_size, ldif_attr, attr_len+1);
dn_size += attr_len;
}
dn_size ++;
tmp_dn = talloc_realloc(tmp_ctx, dn, char,
dn_size+1);
if (!tmp_dn) {
ret = ENOMEM;
free_attribute_list(attrs);
free_section_list(sections);
goto error;
}
dn = tmp_dn;
dn[dn_size-1] = '\n';
dn[dn_size] = '\0';
DEBUG(SSSDBG_TRACE_ALL, "Section dn\n%s", dn);
tmp_ldif = talloc_realloc(mem_ctx, ldif, char,
ldif_len+dn_size+1);
if (!tmp_ldif) {
ret = ENOMEM;
free_attribute_list(attrs);
free_section_list(sections);
goto error;
}
ldif = tmp_ldif;
memcpy(ldif+ldif_len, dn, dn_size);
ldif_len += dn_size;
free_attribute_list(attrs);
talloc_free(dn);
}
ldif[ldif_len] = '\0';
free_section_list(sections);
*config_ldif = (const char *)ldif;
talloc_free(tmp_ctx);
return EOK;
error:
talloc_free(ldif);
return ret;
}