2 * libuci - Library for the Unified Configuration Interface
3 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU Lesser General Public License for more details.
16 * This file contains some common code for the uci library
20 #include <sys/types.h>
29 static const char *uci_errstr[] = {
31 [UCI_ERR_MEM] = "Out of memory",
32 [UCI_ERR_INVAL] = "Invalid argument",
33 [UCI_ERR_NOTFOUND] = "Entry not found",
34 [UCI_ERR_IO] = "I/O error",
35 [UCI_ERR_PARSE] = "Parse error",
36 [UCI_ERR_DUPLICATE] = "Duplicate entry",
37 [UCI_ERR_UNKNOWN] = "Unknown error",
40 #include "uci_internal.h"
43 __private const char *uci_confdir = UCI_CONFDIR;
44 __private const char *uci_savedir = UCI_SAVEDIR;
46 /* exported functions */
47 struct uci_context *uci_alloc_context(void)
49 struct uci_context *ctx;
51 ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
55 memset(ctx, 0, sizeof(struct uci_context));
56 uci_list_init(&ctx->root);
57 uci_list_init(&ctx->delta_path);
58 uci_list_init(&ctx->backends);
59 uci_list_init(&ctx->hooks);
60 ctx->flags = UCI_FLAG_STRICT | UCI_FLAG_SAVED_DELTA;
62 ctx->confdir = (char *) uci_confdir;
63 ctx->savedir = (char *) uci_savedir;
65 uci_list_add(&ctx->backends, &uci_file_backend.e.list);
66 ctx->backend = &uci_file_backend;
71 void uci_free_context(struct uci_context *ctx)
73 struct uci_element *e, *tmp;
75 if (ctx->confdir != uci_confdir)
77 if (ctx->savedir != uci_savedir)
81 UCI_TRAP_SAVE(ctx, ignore);
82 uci_foreach_element_safe(&ctx->root, tmp, e) {
83 struct uci_package *p = uci_to_package(e);
86 uci_foreach_element_safe(&ctx->delta_path, tmp, e) {
89 UCI_TRAP_RESTORE(ctx);
96 int uci_set_confdir(struct uci_context *ctx, const char *dir)
101 UCI_ASSERT(ctx, dir != NULL);
103 cdir = uci_strdup(ctx, dir);
104 if (ctx->confdir != uci_confdir)
110 __private void uci_cleanup(struct uci_context *ctx)
112 struct uci_parse_context *pctx;
126 uci_free_package(&pctx->package);
135 uci_perror(struct uci_context *ctx, const char *str)
137 uci_get_errorstr(ctx, NULL, str);
141 uci_get_errorstr(struct uci_context *ctx, char **dest, const char *prefix)
143 static char error_info[128];
147 "%s%s" /* function */
158 if ((err < 0) || (err >= UCI_ERR_LAST))
159 err = UCI_ERR_UNKNOWN;
164 snprintf(error_info, sizeof(error_info) - 1, " (%s) at line %d, byte %d", (ctx->pctx->reason ? ctx->pctx->reason : "unknown"), ctx->pctx->line, ctx->pctx->byte);
172 err = asprintf(dest, format,
173 (prefix ? prefix : ""), (prefix ? ": " : ""),
174 (ctx && ctx->func ? ctx->func : ""), (ctx && ctx->func ? ": " : ""),
180 strcat(error_info, "\n");
181 fprintf(stderr, format,
182 (prefix ? prefix : ""), (prefix ? ": " : ""),
183 (ctx && ctx->func ? ctx->func : ""), (ctx && ctx->func ? ": " : ""),
189 int uci_list_configs(struct uci_context *ctx, char ***list)
192 UCI_ASSERT(ctx, list != NULL);
193 UCI_ASSERT(ctx, ctx->backend && ctx->backend->list_configs);
194 *list = ctx->backend->list_configs(ctx);
198 int uci_commit(struct uci_context *ctx, struct uci_package **package, bool overwrite)
200 struct uci_package *p;
202 UCI_ASSERT(ctx, package != NULL);
204 UCI_ASSERT(ctx, p != NULL);
205 UCI_ASSERT(ctx, p->backend && p->backend->commit);
206 p->backend->commit(ctx, package, overwrite);
210 int uci_load(struct uci_context *ctx, const char *name, struct uci_package **package)
212 struct uci_package *p;
213 struct uci_element *e;
216 UCI_ASSERT(ctx, ctx->backend && ctx->backend->load);
217 p = ctx->backend->load(ctx, name);
218 uci_foreach_element(&ctx->hooks, e) {
219 struct uci_hook *h = uci_to_hook(e);
221 h->ops->load(h->ops, p);
229 int uci_set_backend(struct uci_context *ctx, const char *name)
231 struct uci_element *e;
234 UCI_ASSERT(ctx, name != NULL);
235 e = uci_lookup_list(&ctx->backends, name);
237 UCI_THROW(ctx, UCI_ERR_NOTFOUND);
238 ctx->backend = uci_to_backend(e);
242 int uci_add_hook(struct uci_context *ctx, const struct uci_hook_ops *ops)
244 struct uci_element *e;
249 /* check for duplicate elements */
250 uci_foreach_element(&ctx->hooks, e) {
253 return UCI_ERR_INVAL;
256 h = uci_alloc_element(ctx, hook, "", 0);
258 uci_list_init(&h->e.list);
259 uci_list_add(&ctx->hooks, &h->e.list);
264 int uci_remove_hook(struct uci_context *ctx, const struct uci_hook_ops *ops)
266 struct uci_element *e;
268 uci_foreach_element(&ctx->hooks, e) {
269 struct uci_hook *h = uci_to_hook(e);
271 uci_list_del(&e->list);
276 return UCI_ERR_NOTFOUND;