libuci.c

   1 /*
   2  * libuci - Library for the Unified Configuration Interface
   3  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
   4  *
   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
   8  *
   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 General Public License for more details.
  13  */
  14
  15 /*
  16  * This file contains some common code for the uci library
  17  */
  18
  19 #include <sys/types.h>
  20 #include <stdbool.h>
  21 #include <string.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include "uci.h"
  25 #include "err.h"
  26
  27 static const char *uci_errstr[] = {
  28         [UCI_OK] =           "Success",
  29         [UCI_ERR_MEM] =      "Out of memory",
  30         [UCI_ERR_INVAL] =    "Invalid argument",
  31         [UCI_ERR_NOTFOUND] = "Entry not found",
  32         [UCI_ERR_IO] =       "I/O error",
  33         [UCI_ERR_PARSE] =    "Parse error",
  34         [UCI_ERR_UNKNOWN] =  "Unknown error",
  35 };
  36
  37 #include "util.c"
  38 #include "list.c"
  39 #include "file.c"
  40
  41 /* exported functions */
  42 struct uci_context *uci_alloc_context(void)
  43 {
  44         struct uci_context *ctx;
  45
  46         ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
  47         memset(ctx, 0, sizeof(struct uci_context));
  48         uci_list_init(&ctx->root);
  49
  50         return ctx;
  51 }
  52
  53 void uci_free_context(struct uci_context *ctx)
  54 {
  55         struct uci_element *e, *tmp;
  56
  57         UCI_TRAP_SAVE(ctx, ignore);
  58         uci_cleanup(ctx);
  59         uci_foreach_element_safe(&ctx->root, tmp, e) {
  60                 uci_free_package(uci_to_package(e));
  61         }
  62         free(ctx);
  63         UCI_TRAP_RESTORE(ctx);
  64
  65 ignore:
  66         return;
  67 }
  68
  69 int uci_cleanup(struct uci_context *ctx)
  70 {
  71         UCI_HANDLE_ERR(ctx);
  72         uci_file_cleanup(ctx);
  73         return 0;
  74 }
  75
  76 void uci_perror(struct uci_context *ctx, const char *str)
  77 {
  78         int err;
  79
  80         if (!ctx)
  81                 err = UCI_ERR_INVAL;
  82         else
  83                 err = ctx->errno;
  84
  85         if ((err < 0) || (err >= UCI_ERR_LAST))
  86                 err = UCI_ERR_UNKNOWN;
  87
  88         switch (err) {
  89         case UCI_ERR_PARSE:
  90                 if (ctx->pctx) {
  91                         fprintf(stderr, "%s: %s (%s) at line %d, byte %d\n", str, uci_errstr[err], (ctx->pctx->reason ? ctx->pctx->reason : "unknown"), ctx->pctx->line, ctx->pctx->byte);
  92                         break;
  93                 }
  94                 /* fall through */
  95         default:
  96                 fprintf(stderr, "%s: %s\n", str, uci_errstr[err]);
  97                 break;
  98         }
  99 }
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