hybris/utils/getprop.c

   1 /*
   2  * Copyright (c) 2008 The Android Open Source Project
   3  *               2013 Canonical Ltd
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  * http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include <hybris/properties/properties.h>
  24
  25 typedef struct {
  26         int count;
  27         char** items;
  28 } list_t;
  29
  30 static void record_prop(const char* key, const char* name, void* opaque)
  31 {
  32         list_t *list = (list_t *) opaque;
  33
  34         char temp[PROP_VALUE_MAX + PROP_NAME_MAX + 16];
  35         snprintf(temp, sizeof(temp), "[%s]: [%s]", key, name);
  36         list->items = realloc(list->items, (list->count + 1) * sizeof(char **));
  37         list->items[list->count++] = strdup(temp);
  38 }
  39
  40 static void list_properties(void)
  41 {
  42         int n;
  43
  44         list_t list;
  45         memset(&list, 0, sizeof(list_t));
  46
  47         /* Record properties in the string list */
  48         if (property_list(record_prop, &list) < 0)
  49                 return;
  50
  51         for (n = 0; n < list.count; n++) {
  52                 printf("%s\n", (char *) list.items[n]);
  53         }
  54 }
  55
  56 int main(int argc, char *argv[])
  57 {
  58         int n = 0;
  59
  60         if (argc == 1) {
  61                 list_properties();
  62         } else {
  63                 char value[PROP_VALUE_MAX];
  64                 char *default_value;
  65                 if (argc > 2) {
  66                         default_value = argv[2];
  67                 } else {
  68                         default_value = "";
  69                 }
  70
  71                 property_get(argv[1], value, default_value);
  72                 printf("%s\n", value);
  73         }
  74         return 0;
  75 }