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_confdir = UCI_CONFDIR;
  29 static const char *uci_savedir = UCI_SAVEDIR;
  30
  31 static const char *uci_errstr[] = {
  32         [UCI_OK] =            "Success",
  33         [UCI_ERR_MEM] =       "Out of memory",
  34         [UCI_ERR_INVAL] =     "Invalid argument",
  35         [UCI_ERR_NOTFOUND] =  "Entry not found",
  36         [UCI_ERR_IO] =        "I/O error",
  37         [UCI_ERR_PARSE] =     "Parse error",
  38         [UCI_ERR_DUPLICATE] = "Duplicate entry",
  39         [UCI_ERR_UNKNOWN] =   "Unknown error",
  40 };
  41
  42 #include "uci_internal.h"
  43 #include "util.c"
  44 #include "list.c"
  45 #include "history.c"
  46 #include "file.c"
  47
  48 /* exported functions */
  49 struct uci_context *uci_alloc_context(void)
  50 {
  51         struct uci_context *ctx;
  52
  53         ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
  54         memset(ctx, 0, sizeof(struct uci_context));
  55         uci_list_init(&ctx->root);
  56         uci_list_init(&ctx->history_path);
  57         ctx->flags = UCI_FLAG_STRICT;
  58
  59         ctx->confdir = (char *) uci_confdir;
  60         ctx->savedir = (char *) uci_savedir;
  61
  62         return ctx;
  63 }
  64
  65 void uci_free_context(struct uci_context *ctx)
  66 {
  67         struct uci_element *e, *tmp;
  68
  69         if (ctx->confdir != uci_confdir)
  70                 free(ctx->confdir);
  71         if (ctx->savedir != uci_savedir)
  72                 free(ctx->savedir);
  73
  74         UCI_TRAP_SAVE(ctx, ignore);
  75         ctx->internal = true;
  76         uci_cleanup(ctx);
  77         uci_foreach_element_safe(&ctx->root, tmp, e) {
  78                 struct uci_package *p = uci_to_package(e);
  79                 uci_free_package(&p);
  80         }
  81         uci_foreach_element_safe(&ctx->history_path, tmp, e) {
  82                 uci_free_element(e);
  83         }
  84         free(ctx);
  85         UCI_TRAP_RESTORE(ctx);
  86
  87 ignore:
  88         return;
  89 }
  90
  91 int uci_set_confdir(struct uci_context *ctx, const char *dir)
  92 {
  93         char *cdir;
  94
  95         UCI_HANDLE_ERR(ctx);
  96         UCI_ASSERT(ctx, dir != NULL);
  97
  98         cdir = uci_strdup(ctx, dir);
  99         if (ctx->confdir != uci_confdir)
 100                 free(ctx->confdir);
 101         ctx->confdir = cdir;
 102         return 0;
 103 }
 104
 105 int uci_cleanup(struct uci_context *ctx)
 106 {
 107         UCI_HANDLE_ERR(ctx);
 108         uci_file_cleanup(ctx);
 109         return 0;
 110 }
 111
 112 void uci_perror(struct uci_context *ctx, const char *prefix)
 113 {
 114         int err;
 115
 116         if (!ctx)
 117                 err = UCI_ERR_INVAL;
 118         else
 119                 err = ctx->errno;
 120
 121         if ((err < 0) || (err >= UCI_ERR_LAST))
 122                 err = UCI_ERR_UNKNOWN;
 123
 124         if (prefix)
 125                 fprintf(stderr, "%s: ", prefix);
 126         if (ctx->func)
 127                 fprintf(stderr, "%s: ", ctx->func);
 128
 129         switch (err) {
 130         case UCI_ERR_PARSE:
 131                 if (ctx->pctx) {
 132                         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);
 133                         break;
 134                 }
 135                 /* fall through */
 136         default:
 137                 fprintf(stderr, "%s\n", uci_errstr[err]);
 138                 break;
 139         }
 140 }
 141
 142