#include <stdio.h>
#include <sql.h>
#include <sqlext.h>

void main() {
  SQLHENV env;
  char dsn[256];
  char desc[256];
  SQLSMALLINT dsn_ret;
  SQLSMALLINT desc_ret;
  SQLUSMALLINT direction;
  SQLRETURN ret;

  SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &env);
  SQLSetEnvAttr(env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);

  direction = SQL_FETCH_FIRST;
  while(SQL_SUCCEEDED(ret = SQLDataSources(env, direction,
					   dsn, sizeof(dsn), &dsn_ret,
					   desc, sizeof(desc), &desc_ret))) {
    direction = SQL_FETCH_NEXT;
    printf("%s - %s\n", dsn, desc);
    if (ret == SQL_SUCCESS_WITH_INFO) printf("\tdata truncation\n");
  }
}