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