minix/test/ds/subs.c
David van Moolenbroek 80bd109cd3 libsys: various updates
- move system calls for use by services from libminlib into libsys;
- move srv_fork(2) and srv_kill(2) from RS and into libsys;
- replace getprocnr(2) with sef_self(3);
- rename previous getnprocnr(2) to getprocnr(2);
- clean up getepinfo(2);
- change all libsys calls that used _syscall to use _taskcall, so as
  to avoid going through errno to pass errors; this is already how
  most calls work anyway, and many of the calls previously using
  _syscall were already assumed to return the actual error;
- initialize request messages to zero, for future compatibility
  (note that this does not include PCI calls, which are in need of a
  much bigger overhaul, nor kernel calls);
- clean up more of dead DS code as a side effect.

Change-Id: I8788f54c68598fcf58e23486e270c2d749780ebb
2014-03-01 09:05:00 +01:00

91 lines
2 KiB
C

#include "inc.h"
char *key_u32 = "test_u32";
/* SEF functions and variables. */
static void sef_local_startup(void);
/*===========================================================================*
* main *
*===========================================================================*/
int main(void)
{
int r;
message mess;
char key[DS_MAX_KEYLEN];
int type;
u32_t num;
char string[17];
char buf[1000];
size_t length = 1000;
/* SEF local startup. */
sef_local_startup();
/* Subscribe. */
r = ds_subscribe(key_u32, DSF_INITIAL);
if(r != OK && r != EEXIST) {
printf("SUBSCRIBER: error in ds_subscribe: %d\n", r);
return -1;
}
while(1) {
/* Wait for a message. */
r = sef_receive(ANY, &mess);
if(r != OK) {
printf("SUBSCRIBER: sef_receive failed.\n");
return 1;
}
/* Only handle notifications from DS. */
if(mess.m_source != DS_PROC_NR)
continue;
/* Check which one was changed. */
r = ds_check(key, &type, NULL);
if(r == ENOENT) {
printf("SUBSCRIBER: the key %s was deleted.\n",
key);
continue;
}
if(r != OK) {
printf("SUBSCRIBER: error in ds_check.\n");
continue;
}
/* Retrieve the entry. */
printf("SUBSCRIBER: key: %s, ", key);
switch(type) {
case DSF_TYPE_U32:
r = ds_retrieve_u32(key, &num);
if(r != OK)
printf("error in ds_retrieve_u32.\n");
printf("U32: %d\n", num);
break;
case DSF_TYPE_STR:
r = ds_retrieve_str(key, string, sizeof(string)-1);
if(r != OK)
printf("error in ds_retrieve_str.\n");
printf("STR: %s\n", string);
break;
case DSF_TYPE_MEM:
r = ds_retrieve_mem(key, buf, &length);
if(r != OK)
printf("error in ds_retrieve_mem.\n");
break;
default:
printf("error in type! %d\n", type);
}
}
return 0;
}
/*===========================================================================*
* sef_local_startup *
*===========================================================================*/
static void sef_local_startup()
{
/* Let SEF perform startup. */
sef_startup();
}