contrib/package/freifunk-watchdog/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  *   Changed by Jo-Philipp Wich <xm@subsignal.org>
  19  */
  20
  21 #include <string.h>
  22 #include <stdlib.h>
  23
  24 #include <uci_config.h>
  25 #include <uci.h>
  26 #include "ucix.h"
  27
  28 static struct uci_ptr ptr;
  29
  30 static inline int ucix_get_ptr(struct uci_context *ctx, const char *p, const char *s, const char *o, const char *t)
  31 {
  32         memset(&ptr, 0, sizeof(ptr));
  33         ptr.package = p;
  34         ptr.section = s;
  35         ptr.option = o;
  36         ptr.value = t;
  37         return uci_lookup_ptr(ctx, &ptr, NULL, true);
  38 }
  39
  40 struct uci_context* ucix_init(const char *config_file)
  41 {
  42         struct uci_context *ctx = uci_alloc_context();
  43 #ifdef uci_to_delta
  44         uci_add_delta_path(ctx, "/var/state");
  45 #else
  46         uci_add_history_path(ctx, "/var/state");
  47 #endif
  48         if(uci_load(ctx, config_file, NULL) != UCI_OK)
  49         {
  50                 return NULL;
  51         }
  52         return ctx;
  53 }
  54
  55 void ucix_cleanup(struct uci_context *ctx)
  56 {
  57         uci_free_context(ctx);
  58 }
  59
  60 const char* ucix_get_option(struct uci_context *ctx, const char *p, const char *s, const char *o)
  61 {
  62         struct uci_element *e = NULL;
  63         const char *value = NULL;
  64         if(ucix_get_ptr(ctx, p, s, o, NULL))
  65                 return NULL;
  66         if (!(ptr.flags & UCI_LOOKUP_COMPLETE))
  67                 return NULL;
  68         e = ptr.last;
  69         switch (e->type)
  70         {
  71         case UCI_TYPE_SECTION:
  72                 value = uci_to_section(e)->type;
  73                 break;
  74         case UCI_TYPE_OPTION:
  75                 switch(ptr.o->type) {
  76                         case UCI_TYPE_STRING:
  77                                 value = ptr.o->v.string;
  78                                 break;
  79                         default:
  80                                 value = NULL;
  81                                 break;
  82                 }
  83                 break;
  84         default:
  85                 return 0;
  86         }
  87
  88         return value;
  89 }
  90
  91 void ucix_for_each_section_type(struct uci_context *ctx,
  92         const char *p, const char *t,
  93         void (*cb)(const char*, void*), void *priv)
  94 {
  95         struct uci_element *e;
  96         if(ucix_get_ptr(ctx, p, NULL, NULL, NULL))
  97                 return;
  98         uci_foreach_element(&ptr.p->sections, e)
  99                 if (!strcmp(t, uci_to_section(e)->type))
 100                         cb(e->name, priv);
 101 }
 102