* 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 "uci.h"
-#include "libuci.h"
+static const char *uci_confdir = UCI_CONFDIR;
+static const char *uci_savedir = UCI_SAVEDIR;
-#define DEBUG
+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",
+};
-#ifdef DEBUG
-#define DPRINTF(...) fprintf(stderr, __VA_ARGS__)
-#else
-#define DPRINTF(...)
-#endif
-/*
- * throw an uci exception and store the error number
- * in the context.
- */
-#define UCI_THROW(ctx, err) do { \
- longjmp(ctx->trap, err); \
-} while (0)
+static void uci_cleanup(struct uci_context *ctx);
-/*
- * store the return address for handling exceptions
- * needs to be called in every externally visible library function
- *
- * NB: this does not handle recursion at all. Calling externally visible
- * functions from other uci functions is only allowed at the end of the
- * calling function.
- */
-#define UCI_HANDLE_ERR(ctx) do { \
- int __val; \
- if (!ctx) \
- return UCI_ERR_INVAL; \
- __val = setjmp(ctx->trap); \
- if (__val) { \
- ctx->errno = __val; \
- return __val; \
- } \
-} while (0)
+#include "uci_internal.h"
+#include "util.c"
+#include "list.c"
+#include "history.c"
+#include "file.c"
-/*
- * check the specified condition.
- * throw an invalid argument exception if it's false
- */
-#define UCI_ASSERT(ctx, expr) do { \
- if (!(expr)) { \
- DPRINTF("[%s:%d] Assertion failed\n", __FILE__, __LINE__); \
- UCI_THROW(ctx, UCI_ERR_INVAL); \
- } \
-} while (0)
-
-
-static 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_PARSE] = "Parse error",
- [UCI_ERR_UNKNOWN] = "Unknown error",
-};
+/* exported functions */
+struct uci_context *uci_alloc_context(void)
+{
+ struct uci_context *ctx;
+ ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
+ memset(ctx, 0, sizeof(struct uci_context));
+ uci_list_init(&ctx->root);
+ uci_list_init(&ctx->history_path);
+ uci_list_init(&ctx->backends);
+ ctx->flags = UCI_FLAG_STRICT;
-/*
- * UCI wrapper for malloc, which uses exception handling
- */
-static void *uci_malloc(struct uci_context *ctx, size_t size)
-{
- void *ptr;
-
- ptr = malloc(size);
- if (!ptr)
- UCI_THROW(ctx, UCI_ERR_MEM);
- memset(ptr, 0, size);
-
- return ptr;
-}
+ ctx->confdir = (char *) uci_confdir;
+ ctx->savedir = (char *) uci_savedir;
-/*
- * UCI wrapper for realloc, which uses exception handling
- */
-static void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
-{
- ptr = realloc(ptr, size);
- if (!ptr)
- UCI_THROW(ctx, UCI_ERR_MEM);
+ uci_list_add(&ctx->backends, &uci_file_backend.e.list);
+ ctx->backend = &uci_file_backend;
- return ptr;
+ return ctx;
}
-#include "hash.c"
-#include "parse.c"
+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);
-/* externally visible functions */
+ 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->history_path, tmp, e) {
+ uci_free_element(e);
+ }
+ free(ctx);
+ UCI_TRAP_RESTORE(ctx);
-struct uci_context *uci_alloc(void)
-{
- struct uci_context *ctx;
-
- ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
- memset(ctx, 0, sizeof(struct uci_context));
-
- return ctx;
+ignore:
+ return;
}
-int uci_cleanup(struct uci_context *ctx)
+int uci_set_confdir(struct uci_context *ctx, const char *dir)
{
+ char *cdir;
+
UCI_HANDLE_ERR(ctx);
- uci_parse_cleanup(ctx);
+ UCI_ASSERT(ctx, dir != NULL);
+
+ cdir = uci_strdup(ctx, dir);
+ if (ctx->confdir != uci_confdir)
+ free(ctx->confdir);
+ ctx->confdir = cdir;
return 0;
}
-void uci_perror(struct uci_context *ctx, const char *str)
+static 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 *prefix)
{
int err;
err = UCI_ERR_INVAL;
else
err = ctx->errno;
-
+
if ((err < 0) || (err >= UCI_ERR_LAST))
err = UCI_ERR_UNKNOWN;
+ if (prefix)
+ fprintf(stderr, "%s: ", prefix);
+ if (ctx->func)
+ fprintf(stderr, "%s: ", ctx->func);
+
switch (err) {
case UCI_ERR_PARSE:
if (ctx->pctx) {
- fprintf(stderr, "%s: %s at line %d, byte %d\n", str, uci_errstr[err], ctx->pctx->line, ctx->pctx->byte);
+ fprintf(stderr, "%s (%s) at line %d, byte %d\n", uci_errstr[err], (ctx->pctx->reason ? ctx->pctx->reason : "unknown"), ctx->pctx->line, ctx->pctx->byte);
break;
}
/* fall through */
default:
- fprintf(stderr, "%s: %s\n", str, uci_errstr[err]);
+ fprintf(stderr, "%s\n", uci_errstr[err]);
break;
}
}
+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;
+}
+
+#ifdef UCI_PLUGIN_SUPPORT
+
+__plugin int uci_add_backend(struct uci_context *ctx, struct uci_backend *b)
+{
+ struct uci_element *e;
+ UCI_HANDLE_ERR(ctx);
+
+ e = uci_lookup_list(&ctx->backends, b->e.name);
+ if (e)
+ UCI_THROW(ctx, UCI_ERR_DUPLICATE);
+
+ e = uci_malloc(ctx, sizeof(struct uci_backend));
+ memcpy(e, b, sizeof(struct uci_backend));
+
+ uci_list_add(&ctx->backends, &e->list);
+ return 0;
+}
+
+__plugin int uci_del_backend(struct uci_context *ctx, struct uci_backend *b)
+{
+ struct uci_element *e, *tmp;
+
+ UCI_HANDLE_ERR(ctx);
+
+ e = uci_lookup_list(&ctx->backends, b->e.name);
+ if (!e || uci_to_backend(e)->ptr != b->ptr)
+ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+ b = uci_to_backend(e);
+
+ if (ctx->backend && ctx->backend->ptr == b->ptr)
+ ctx->backend = &uci_file_backend;
+
+ uci_foreach_element_safe(&ctx->root, tmp, e) {
+ struct uci_package *p = uci_to_package(e);
+
+ if (!p->backend)
+ continue;
+
+ if (p->backend->ptr == b->ptr)
+ UCI_INTERNAL(uci_unload, ctx, p);
+ }
+
+ uci_list_del(&b->e.list);
+ free(b);
+
+ return 0;
+}
+
+#endif
+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;
+}
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