ODBC Driver for Linux での API パラメータの文字コードについて

$ sudo ./build_dm.sh

Driver = ODBC Driver 11 for SQL Server Server = <Server Name or IP Address>,<必要であればポート番号>

Description=Microsoft ODBC Driver 11 for SQL Server Driver=/opt/microsoft/msodbcsql/lib64/libmsodbcsql-11.0.so.2270.0 Threading=1 UsageCount=1

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

int main() {
 SQLHENV henv;
 SQLHDBC hdbc;
 SQLHSTMT hstmt = 0;
 SQLRETURN retcode;
 SQLRETURN r = 0;
 SQLCHAR szSqlState[6] = { 0 };
 SQLINTEGER fNativeError = 0;
 SQLCHAR szErrorMsg[256] = { 0 };
 SQLSMALLINT cbErrorMsgMax = sizeof(szErrorMsg) - 1;
 SQLSMALLINT cbErrorMsg = 0;  char *strenv;

 strenv = getenv("LANG");
 //printf("%s\n",strenv);

 // Allocate environment handle
 retcode = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv);

 // Set the ODBC version environment attribute
 if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
  retcode = SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, (SQLPOINTER*)SQL_OV_ODBC3, 0);

  // Allocate connection handle
  if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
   retcode = SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc);

   // Set login timeout to 5 seconds
   if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
    SQLSetConnectAttr(hdbc, SQL_LOGIN_TIMEOUT, (SQLPOINTER)5, 0);

    // Connect to data source
    retcode = SQLConnect(hdbc, (SQLCHAR*) "MSSQLTest", SQL_NTS, (SQLCHAR*) "" , 5, (SQLCHAR*) "", 9);

    // Allocate statement handle
    if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
     retcode = SQLAllocHandle(SQL_HANDLE_STMT, hdbc, &hstmt);

     retcode = SQLExecDirect (hstmt, (SQLCHAR *) "USE [AdventureWorksDW2014]", SQL_NTS);

     r = SQLGetDiagRec(SQL_HANDLE_STMT, hstmt,(SQLSMALLINT) 1, szSqlState, &fNativeError, szErrorMsg, cbErrorMsgMax, &cbErrorMsg);

     printf("%s\n",szErrorMsg);

     if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
      SQLCancel(hstmt);
      SQLFreeHandle(SQL_HANDLE_STMT, hstmt);
     }
     SQLDisconnect(hdbc);
    }
    SQLFreeHandle(SQL_HANDLE_DBC, hdbc);
   }
  }
  SQLFreeHandle(SQL_HANDLE_ENV, henv);
 }
}