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 "util.c"
  43 #include "list.c"
  44 #include "file.c"
  45
  46 /* exported functions */
  47 struct uci_context *uci_alloc_context(void)
  48 {
  49         struct uci_context *ctx;
  50
  51         ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
  52         memset(ctx, 0, sizeof(struct uci_context));
  53         uci_list_init(&ctx->root);
  54         uci_list_init(&ctx->history_path);
  55         ctx->flags = UCI_FLAG_STRICT;
  56
  57         ctx->confdir = (char *) uci_confdir;
  58         ctx->savedir = (char *) uci_savedir;
  59
  60         return ctx;
  61 }
  62
  63 void uci_free_context(struct uci_context *ctx)
  64 {
  65         struct uci_element *e, *tmp;
  66
  67         if (ctx->confdir != uci_confdir)
  68                 free(ctx->confdir);
  69         if (ctx->savedir != uci_savedir)
  70                 free(ctx->savedir);
  71
  72         UCI_TRAP_SAVE(ctx, ignore);
  73         uci_cleanup(ctx);
  74         uci_foreach_element_safe(&ctx->root, tmp, e) {
  75                 struct uci_package *p = uci_to_package(e);
  76                 uci_free_package(&p);
  77         }
  78         uci_foreach_element_safe(&ctx->history_path, tmp, e) {
  79                 uci_free_element(e);
  80         }
  81         free(ctx);
  82         UCI_TRAP_RESTORE(ctx);
  83
  84 ignore:
  85         return;
  86 }
  87
  88 int uci_add_history_path(struct uci_context *ctx, const char *dir)
  89 {
  90         struct uci_element *e;
  91
  92         UCI_HANDLE_ERR(ctx);
  93         UCI_ASSERT(ctx, dir != NULL);
  94         e = uci_alloc_generic(ctx, UCI_TYPE_PATH, dir, sizeof(struct uci_element));
  95         uci_list_add(&ctx->history_path, &e->list);
  96
  97         return 0;
  98 }
  99
 100 int uci_set_confdir(struct uci_context *ctx, const char *dir)
 101 {
 102         char *cdir;
 103
 104         UCI_HANDLE_ERR(ctx);
 105         UCI_ASSERT(ctx, dir != NULL);
 106
 107         cdir = uci_strdup(ctx, dir);
 108         if (ctx->confdir != uci_confdir)
 109                 free(ctx->confdir);
 110         ctx->confdir = cdir;
 111         return 0;
 112 }
 113
 114 int uci_set_savedir(struct uci_context *ctx, const char *dir)
 115 {
 116         char *sdir;
 117
 118         UCI_HANDLE_ERR(ctx);
 119         UCI_ASSERT(ctx, dir != NULL);
 120
 121         sdir = uci_strdup(ctx, dir);
 122         if (ctx->savedir != uci_savedir)
 123                 free(ctx->savedir);
 124         ctx->savedir = sdir;
 125         return 0;
 126 }
 127
 128 int uci_cleanup(struct uci_context *ctx)
 129 {
 130         UCI_HANDLE_ERR(ctx);
 131         uci_file_cleanup(ctx);
 132         return 0;
 133 }
 134
 135 void uci_perror(struct uci_context *ctx, const char *prefix)
 136 {
 137         int err;
 138
 139         if (!ctx)
 140                 err = UCI_ERR_INVAL;
 141         else
 142                 err = ctx->errno;
 143
 144         if ((err < 0) || (err >= UCI_ERR_LAST))
 145                 err = UCI_ERR_UNKNOWN;
 146
 147         if (prefix)
 148                 fprintf(stderr, "%s: ", prefix);
 149         if (ctx->func)
 150                 fprintf(stderr, "%s: ", ctx->func);
 151
 152         switch (err) {
 153         case UCI_ERR_PARSE:
 154                 if (ctx->pctx) {
 155                         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);
 156                         break;
 157                 }
 158                 /* fall through */
 159         default:
 160                 fprintf(stderr, "%s\n", uci_errstr[err]);
 161                 break;
 162         }
 163 }
 164
 165