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