contrib/fwd/src/ucix.c

   1 /*
   2  *   This program is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License as published by
   4  *   the Free Software Foundation; either version 2 of the License, or
   5  *   (at your option) any later version.
   6  *
   7  *   This program is distributed in the hope that it will be useful,
   8  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  *   GNU General Public License for more details.
  11  *
  12  *   You should have received a copy of the GNU General Public License
  13  *   along with this program; if not, write to the Free Software
  14  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  15  *
  16  *   Copyright (C) 2008 John Crispin <blogic@openwrt.org>
  17  */
  18
  19 #include <string.h>
  20 #include <stdlib.h>
  21 #include <ctype.h>
  22
  23 #include <uci_config.h>
  24 #include <uci.h>
  25 #include "ucix.h"
  26
  27 static struct uci_ptr ptr;
  28
  29 static inline int ucix_get_ptr(struct uci_context *ctx, const char *p, const char *s, const char *o, const char *t)
  30 {
  31         memset(&ptr, 0, sizeof(ptr));
  32         ptr.package = p;
  33         ptr.section = s;
  34         ptr.option = o;
  35         ptr.value = t;
  36         return uci_lookup_ptr(ctx, &ptr, NULL, true);
  37 }
  38
  39 struct uci_context* ucix_init(const char *config_file)
  40 {
  41         struct uci_context *ctx = uci_alloc_context();
  42         uci_add_history_path(ctx, "/var/state");
  43         if(uci_load(ctx, config_file, NULL) != UCI_OK)
  44         {
  45                 printf("%s/%s is missing or corrupt\n", ctx->savedir, config_file);
  46                 return NULL;
  47         }
  48         return ctx;
  49 }
  50
  51 struct uci_context* ucix_init_path(const char *path, const char *config_file)
  52 {
  53         struct uci_context *ctx = uci_alloc_context();
  54         if(path)
  55                 uci_set_confdir(ctx, path);
  56         if(uci_load(ctx, config_file, NULL) != UCI_OK)
  57         {
  58                 printf("%s/%s is missing or corrupt\n", ctx->savedir, config_file);
  59                 return NULL;
  60         }
  61         return ctx;
  62 }
  63
  64 int ucix_load(struct uci_context *ctx, const char *config_file)
  65 {
  66         if(uci_load(ctx, config_file, NULL) != UCI_OK)
  67         {
  68                 printf("%s/%s is missing or corrupt\n", ctx->savedir, config_file);
  69                 return 0;
  70         }
  71         return 1;
  72 }
  73
  74 void ucix_cleanup(struct uci_context *ctx)
  75 {
  76         uci_free_context(ctx);
  77 }
  78
  79 void ucix_save(struct uci_context *ctx)
  80 {
  81         uci_set_savedir(ctx, "/tmp/.uci/");
  82         uci_save(ctx, NULL);
  83 }
  84
  85 void ucix_save_state(struct uci_context *ctx)
  86 {
  87         uci_set_savedir(ctx, "/var/state/");
  88         uci_save(ctx, NULL);
  89 }
  90
  91 const char* ucix_get_option(struct uci_context *ctx, const char *p, const char *s, const char *o)
  92 {
  93         struct uci_element *e = NULL;
  94         const char *value = NULL;
  95         if(ucix_get_ptr(ctx, p, s, o, NULL))
  96                 return NULL;
  97         if (!(ptr.flags & UCI_LOOKUP_COMPLETE))
  98                 return NULL;
  99         e = ptr.last;
 100         switch (e->type)
 101         {
 102                 case UCI_TYPE_SECTION:
 103                         value = uci_to_section(e)->type;
 104                         break;
 105
 106                 case UCI_TYPE_OPTION:
 107                         switch(ptr.o->type) {
 108                                 case UCI_TYPE_STRING:
 109                                         value = ptr.o->v.string;
 110                                         break;
 111                                 default:
 112                                         value = NULL;
 113                                         break;
 114                         }
 115                         break;
 116
 117                 default:
 118                         return 0;
 119         }
 120
 121         return value;
 122 }
 123
 124 int ucix_for_each_list(
 125         struct uci_context *ctx, const char *p, const char *s, const char *o,
 126         void (*cb)(const char*, void*), void *priv)
 127 {
 128         struct uci_element *e = NULL;
 129         char *value = NULL;
 130         int count = 0;
 131         if(ucix_get_ptr(ctx, p, s, o, NULL))
 132                 return -1;
 133         if (!(ptr.flags & UCI_LOOKUP_COMPLETE))
 134                 return -1;
 135         e = ptr.last;
 136         if(e->type == UCI_TYPE_OPTION)
 137         {
 138                 switch(ptr.o->type)
 139                 {
 140                         case UCI_TYPE_LIST:
 141                                 uci_foreach_element(&ptr.o->v.list, e) {
 142                                         cb(e->name, priv);
 143                                         count++;
 144                                 }
 145                                 break;
 146
 147                         case UCI_TYPE_STRING:
 148                                 if( (value = strdup(ptr.o->v.string)) != NULL )
 149                                 {
 150                                         char *ts, *tt, *tp;
 151                                         for( ts = value; 1; ts = NULL )
 152                                         {
 153                                                 if( (tt = strtok_r(ts, " \t", &tp)) != NULL )
 154                                                 {
 155                                                         cb(tt, priv);
 156                                                         count++;
 157                                                 }
 158                                                 else
 159                                                 {
 160                                                         break;
 161                                                 }
 162                                         }
 163                                         free(value);
 164                                 }
 165                                 break;
 166                 }
 167
 168                 return count;
 169         }
 170
 171         return -1;
 172 }
 173
 174 int ucix_get_option_int(struct uci_context *ctx, const char *p, const char *s, const char *o, int def)
 175 {
 176         const char *tmp = ucix_get_option(ctx, p, s, o);
 177         int ret = def;
 178
 179         if (tmp)
 180                 ret = atoi(tmp);
 181         return ret;
 182 }
 183
 184 void ucix_add_section(struct uci_context *ctx, const char *p, const char *s, const char *t)
 185 {
 186         if(ucix_get_ptr(ctx, p, s, NULL, t))
 187                 return;
 188         uci_set(ctx, &ptr);
 189 }
 190
 191 void ucix_add_option(struct uci_context *ctx, const char *p, const char *s, const char *o, const char *t)
 192 {
 193         if(ucix_get_ptr(ctx, p, s, o, (t)?(t):("")))
 194                 return;
 195         uci_set(ctx, &ptr);
 196 }
 197
 198 void ucix_add_option_int(struct uci_context *ctx, const char *p, const char *s, const char *o, int t)
 199 {
 200         char tmp[64];
 201         snprintf(tmp, 64, "%d", t);
 202         ucix_add_option(ctx, p, s, o, tmp);
 203 }
 204
 205 void ucix_del(struct uci_context *ctx, const char *p, const char *s, const char *o)
 206 {
 207         if(!ucix_get_ptr(ctx, p, s, o, NULL))
 208                 uci_delete(ctx, &ptr);
 209 }
 210
 211 void ucix_revert(struct uci_context *ctx, const char *p, const char *s, const char *o)
 212 {
 213         if(!ucix_get_ptr(ctx, p, s, o, NULL))
 214                 uci_revert(ctx, &ptr);
 215 }
 216
 217 void ucix_for_each_section_type(struct uci_context *ctx,
 218         const char *p, const char *t,
 219         void (*cb)(struct uci_context *, const char*, void*), void *priv)
 220 {
 221         struct uci_element *e;
 222         if(ucix_get_ptr(ctx, p, NULL, NULL, NULL))
 223                 return;
 224         uci_foreach_element(&ptr.p->sections, e)
 225                 if (!strcmp(t, uci_to_section(e)->type))
 226                         cb(ctx, e->name, priv);
 227 }
 228
 229 int ucix_commit(struct uci_context *ctx, const char *p)
 230 {
 231         if(ucix_get_ptr(ctx, p, NULL, NULL, NULL))
 232                 return 1;
 233         return uci_commit(ctx, &ptr.p, false);
 234 }
 235
 236