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_DUPLICATE] = "Duplicate entry",
  35         [UCI_ERR_UNKNOWN] =   "Unknown error",
  36 };
  37
  38 #include "util.c"
  39 #include "list.c"
  40 #include "file.c"
  41
  42 /* exported functions */
  43 struct uci_context *uci_alloc_context(void)
  44 {
  45         struct uci_context *ctx;
  46
  47         ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
  48         memset(ctx, 0, sizeof(struct uci_context));
  49         uci_list_init(&ctx->root);
  50
  51         return ctx;
  52 }
  53
  54 void uci_free_context(struct uci_context *ctx)
  55 {
  56         struct uci_element *e, *tmp;
  57
  58         UCI_TRAP_SAVE(ctx, ignore);
  59         uci_cleanup(ctx);
  60         uci_foreach_element_safe(&ctx->root, tmp, e) {
  61                 uci_free_package(uci_to_package(e));
  62         }
  63         free(ctx);
  64         UCI_TRAP_RESTORE(ctx);
  65
  66 ignore:
  67         return;
  68 }
  69
  70 int uci_cleanup(struct uci_context *ctx)
  71 {
  72         UCI_HANDLE_ERR(ctx);
  73         uci_file_cleanup(ctx);
  74         return 0;
  75 }
  76
  77 void uci_perror(struct uci_context *ctx, const char *prefix)
  78 {
  79         int err;
  80
  81         if (!ctx)
  82                 err = UCI_ERR_INVAL;
  83         else
  84                 err = ctx->errno;
  85
  86         if ((err < 0) || (err >= UCI_ERR_LAST))
  87                 err = UCI_ERR_UNKNOWN;
  88
  89         if (prefix)
  90                 fprintf(stderr, "%s: ", prefix);
  91         if (ctx->func)
  92                 fprintf(stderr, "%s: ", ctx->func);
  93
  94         switch (err) {
  95         case UCI_ERR_PARSE:
  96                 if (ctx->pctx) {
  97                         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);
  98                         break;
  99                 }
 100                 /* fall through */
 101         default:
 102                 fprintf(stderr, "%s\n", uci_errstr[err]);
 103                 break;
 104         }
 105 }
 106
 107