minix/tests/ds/subs.c

   1 #include "inc.h"
   2
   3 char *key_u32 = "test_u32";
   4
   5 /* SEF functions and variables. */
   6 static void sef_local_startup(void);
   7
   8 /*===========================================================================*
   9  *                              main                                         *
  10  *===========================================================================*/
  11 int main(void)
  12 {
  13         int r;
  14         message mess;
  15         char key[DS_MAX_KEYLEN];
  16         int type;
  17         u32_t num;
  18         char string[17];
  19         char buf[1000];
  20         size_t length = 1000;
  21
  22         /* SEF local startup. */
  23         sef_local_startup();
  24
  25         /* Subscribe. */
  26         r = ds_subscribe(key_u32, DSF_INITIAL);
  27         if(r != OK && r != EEXIST) {
  28                 printf("SUBSCRIBER: error in ds_subscribe: %d\n", r);
  29                 return -1;
  30         }
  31
  32         while(1) {
  33                 /* Wait for a message. */
  34                 r = sef_receive(ANY, &mess);
  35                 if(r != OK) {
  36                         printf("SUBSCRIBER: sef_receive failed.\n");
  37                         return 1;
  38                 }
  39                 /* Only handle notifications from DS. */
  40                 if(mess.m_source != DS_PROC_NR)
  41                         continue;
  42
  43                 /* Check which one was changed. */
  44                 r = ds_check(key, &type, NULL);
  45                 if(r == ENOENT) {
  46                         printf("SUBSCRIBER: the key %s was deleted.\n",
  47                                 key);
  48                         continue;
  49                 }
  50                 if(r != OK) {
  51                         printf("SUBSCRIBER: error in ds_check.\n");
  52                         continue;
  53                 }
  54
  55                 /* Retrieve the entry. */
  56                 printf("SUBSCRIBER: key: %s, ", key);
  57                 switch(type) {
  58                 case DSF_TYPE_U32:
  59                         r = ds_retrieve_u32(key, &num);
  60                         if(r != OK)
  61                                 printf("error in ds_retrieve_u32.\n");
  62                         printf("U32: %d\n", num);
  63                         break;
  64                 case DSF_TYPE_STR:
  65                         r = ds_retrieve_str(key, string, sizeof(string)-1);
  66                         if(r != OK)
  67                                 printf("error in ds_retrieve_str.\n");
  68                         printf("STR: %s\n", string);
  69                         break;
  70                 case DSF_TYPE_MEM:
  71                         r = ds_retrieve_mem(key, buf, &length);
  72                         if(r != OK)
  73                                 printf("error in ds_retrieve_mem.\n");
  74                         break;
  75                 default:
  76                         printf("error in type! %d\n", type);
  77                 }
  78         }
  79
  80         return 0;
  81 }
  82
  83 /*===========================================================================*
  84  *                             sef_local_startup                             *
  85  *===========================================================================*/
  86 static void sef_local_startup()
  87 {
  88   /* Let SEF perform startup. */
  89   sef_startup();
  90 }
  91