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 #define _GNU_SOURCE
  20 #include <sys/types.h>
  21 #include <stdbool.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include "uci.h"
  26 #include "err.h"
  27
  28 static const char *uci_errstr[] = {
  29         [UCI_OK] =            "Success",
  30         [UCI_ERR_MEM] =       "Out of memory",
  31         [UCI_ERR_INVAL] =     "Invalid argument",
  32         [UCI_ERR_NOTFOUND] =  "Entry not found",
  33         [UCI_ERR_IO] =        "I/O error",
  34         [UCI_ERR_PARSE] =     "Parse error",
  35         [UCI_ERR_DUPLICATE] = "Duplicate entry",
  36         [UCI_ERR_UNKNOWN] =   "Unknown error",
  37 };
  38
  39 #include "util.c"
  40 #include "list.c"
  41 #include "file.c"
  42
  43 /* exported functions */
  44 struct uci_context *uci_alloc_context(void)
  45 {
  46         struct uci_context *ctx;
  47
  48         ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
  49         memset(ctx, 0, sizeof(struct uci_context));
  50         uci_list_init(&ctx->root);
  51         ctx->flags = UCI_FLAG_STRICT;
  52
  53         return ctx;
  54 }
  55
  56 void uci_free_context(struct uci_context *ctx)
  57 {
  58         struct uci_element *e, *tmp;
  59
  60         UCI_TRAP_SAVE(ctx, ignore);
  61         uci_cleanup(ctx);
  62         uci_foreach_element_safe(&ctx->root, tmp, e) {
  63                 struct uci_package *p = uci_to_package(e);
  64                 uci_free_package(&p);
  65         }
  66         free(ctx);
  67         UCI_TRAP_RESTORE(ctx);
  68
  69 ignore:
  70         return;
  71 }
  72
  73 int uci_cleanup(struct uci_context *ctx)
  74 {
  75         UCI_HANDLE_ERR(ctx);
  76         uci_file_cleanup(ctx);
  77         return 0;
  78 }
  79
  80 void uci_perror(struct uci_context *ctx, const char *prefix)
  81 {
  82         int err;
  83
  84         if (!ctx)
  85                 err = UCI_ERR_INVAL;
  86         else
  87                 err = ctx->errno;
  88
  89         if ((err < 0) || (err >= UCI_ERR_LAST))
  90                 err = UCI_ERR_UNKNOWN;
  91
  92         if (prefix)
  93                 fprintf(stderr, "%s: ", prefix);
  94         if (ctx->func)
  95                 fprintf(stderr, "%s: ", ctx->func);
  96
  97         switch (err) {
  98         case UCI_ERR_PARSE:
  99                 if (ctx->pctx) {
 100                         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);
 101                         break;
 102                 }
 103                 /* fall through */
 104         default:
 105                 fprintf(stderr, "%s\n", uci_errstr[err]);
 106                 break;
 107         }
 108 }
 109
 110