Mirror of the official OpenWrt uci repository https://git.openwrt.org/project/uci
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/*
* libuci - Library for the Unified Configuration Interface
* Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* 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 Lesser General Public License for more details.
*/
/*
* This file contains some common code for the uci library
*/
#define _GNU_SOURCE
#include <sys/types.h>
#include <stdbool.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <dlfcn.h>
#include <glob.h>
#include "uci.h"
static const char *uci_errstr[] = {
[UCI_OK] = "Success",
[UCI_ERR_MEM] = "Out of memory",
[UCI_ERR_INVAL] = "Invalid argument",
[UCI_ERR_NOTFOUND] = "Entry not found",
[UCI_ERR_IO] = "I/O error",
[UCI_ERR_PARSE] = "Parse error",
[UCI_ERR_DUPLICATE] = "Duplicate entry",
[UCI_ERR_UNKNOWN] = "Unknown error",
};
#include "uci_internal.h"
#include "list.c"
__private const char *uci_confdir = UCI_CONFDIR;
__private const char *uci_savedir = UCI_SAVEDIR;
/* exported functions */
struct uci_context *uci_alloc_context(void)
{
struct uci_context *ctx;
ctx = (struct uci_context *) calloc(1, sizeof(struct uci_context));
if (!ctx)
return NULL;
uci_list_init(&ctx->root);
uci_list_init(&ctx->delta_path);
uci_list_init(&ctx->backends);
ctx->flags = UCI_FLAG_STRICT | UCI_FLAG_SAVED_DELTA;
ctx->confdir = (char *) uci_confdir;
ctx->savedir = (char *) uci_savedir;
uci_add_delta_path(ctx, uci_savedir);
uci_list_add(&ctx->backends, &uci_file_backend.e.list);
ctx->backend = &uci_file_backend;
return ctx;
}
void uci_free_context(struct uci_context *ctx)
{
struct uci_element *e, *tmp;
if (ctx->confdir != uci_confdir)
free(ctx->confdir);
if (ctx->savedir != uci_savedir)
free(ctx->savedir);
uci_cleanup(ctx);
UCI_TRAP_SAVE(ctx, ignore);
uci_foreach_element_safe(&ctx->root, tmp, e) {
struct uci_package *p = uci_to_package(e);
uci_free_package(&p);
}
uci_foreach_element_safe(&ctx->delta_path, tmp, e) {
uci_free_element(e);
}
UCI_TRAP_RESTORE(ctx);
free(ctx);
ignore:
return;
}
int uci_set_confdir(struct uci_context *ctx, const char *dir)
{
char *cdir;
UCI_HANDLE_ERR(ctx);
UCI_ASSERT(ctx, dir != NULL);
cdir = uci_strdup(ctx, dir);
if (ctx->confdir != uci_confdir)
free(ctx->confdir);
ctx->confdir = cdir;
return 0;
}
__private void uci_cleanup(struct uci_context *ctx)
{
struct uci_parse_context *pctx;
if (ctx->buf) {
free(ctx->buf);
ctx->buf = NULL;
ctx->bufsz = 0;
}
pctx = ctx->pctx;
if (!pctx)
return;
ctx->pctx = NULL;
if (pctx->package)
uci_free_package(&pctx->package);
if (pctx->buf)
free(pctx->buf);
free(pctx);
}
void
uci_perror(struct uci_context *ctx, const char *str)
{
uci_get_errorstr(ctx, NULL, str);
}
void
uci_get_errorstr(struct uci_context *ctx, char **dest, const char *prefix)
{
static char error_info[128] = { 0 };
int err;
err = ctx ? ctx->err : UCI_ERR_INVAL;
if ((err < 0) || (err >= UCI_ERR_LAST))
err = UCI_ERR_UNKNOWN;
if (ctx && ctx->pctx && (err == UCI_ERR_PARSE)) {
snprintf(error_info, sizeof(error_info) - 1, " (%s) at line %d, byte %zu",
(ctx->pctx->reason ? ctx->pctx->reason : "unknown"),
ctx->pctx->line, ctx->pctx->byte);
}
if (!dest) {
strcat(error_info, "\n");
fprintf(stderr, "%s%s%s%s%s%s",
(prefix ? prefix : ""), (prefix ? ": " : ""),
(ctx && ctx->func ? ctx->func : ""), (ctx && ctx->func ? ": " : ""),
uci_errstr[err],
error_info);
return;
}
err = asprintf(dest, "%s%s%s%s%s%s",
(prefix ? prefix : ""), (prefix ? ": " : ""),
(ctx && ctx->func ? ctx->func : ""), (ctx && ctx->func ? ": " : ""),
uci_errstr[err],
error_info);
if (err < 0)
*dest = NULL;
}
int uci_list_configs(struct uci_context *ctx, char ***list)
{
UCI_HANDLE_ERR(ctx);
UCI_ASSERT(ctx, list != NULL);
UCI_ASSERT(ctx, ctx->backend && ctx->backend->list_configs);
*list = ctx->backend->list_configs(ctx);
return 0;
}
int uci_commit(struct uci_context *ctx, struct uci_package **package, bool overwrite)
{
struct uci_package *p;
UCI_HANDLE_ERR(ctx);
UCI_ASSERT(ctx, package != NULL);
p = *package;
UCI_ASSERT(ctx, p != NULL);
UCI_ASSERT(ctx, p->backend && p->backend->commit);
p->backend->commit(ctx, package, overwrite);
return 0;
}
int uci_load(struct uci_context *ctx, const char *name, struct uci_package **package)
{
struct uci_package *p;
UCI_HANDLE_ERR(ctx);
UCI_ASSERT(ctx, ctx->backend && ctx->backend->load);
p = ctx->backend->load(ctx, name);
if (package)
*package = p;
return 0;
}
int uci_set_backend(struct uci_context *ctx, const char *name)
{
struct uci_element *e;
UCI_HANDLE_ERR(ctx);
UCI_ASSERT(ctx, name != NULL);
e = uci_lookup_list(&ctx->backends, name);
if (!e)
UCI_THROW(ctx, UCI_ERR_NOTFOUND);
ctx->backend = uci_to_backend(e);
return 0;
}