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/**************************************************
* SQLManageDataSources
*
**************************************************
* This code was created by Peter Harvey @ CodeByDesign.
* Released under LGPL 28.JAN.99
*
* Contributions from...
* -----------------------------------------------
* Peter Harvey - pharvey@codebydesign.com
**************************************************/
#include <config.h>
#include <odbcinstext.h>
/*!
* \brief Get the short name of the UI plugin.
*
* The short name is the file name without path or file extension.
*
* We silently prepend "lib" here as well.
*
* \param pszName Place to put short name. Should be FILENAME_MAX bytes.
* \param pszUI Our generic window handle.
*
* \return char* pszName returned for convenience.
*/
char *_getUIPluginName( char *pszName, char *pszUI )
{
*pszName = '\0';
/* is it being provided by caller? */
if ( pszUI && *pszUI )
{
sprintf( pszName, "lib%s", pszUI );
return pszName;
}
/* is it being provided by env var? */
{
char *pEnvVar = getenv( "ODBCINSTUI" );
if ( pEnvVar )
{
sprintf( pszName, "lib%s", pEnvVar );
return pszName;
}
}
/* is it being provided by odbcinst.ini? */
{
char sz[FILENAME_MAX];
*sz='\0';
SQLGetPrivateProfileString( "ODBC", "ODBCINSTUI", "", sz, FILENAME_MAX, "odbcinst.ini" );
if ( *sz )
{
sprintf( pszName, "lib%s", sz );
return pszName;
}
}
/* default to qt4 */
strcpy( pszName, "libodbcinstQ4" );
return pszName;
}
/*!
* \brief Append the file extension used by the OS for plugins.
*
* We use SHLIBEXT which is picked up at configure/build time.
*
* \param pszNameAndExtension Output. Needs to be FILENAME_MAX bytes.
* \param pszName Input.
*
* \return char* pszNameAndExtension returned for convenience.
*/
char *_appendUIPluginExtension( char *pszNameAndExtension, char *pszName )
{
if ( strlen( SHLIBEXT ) > 0 )
sprintf( pszNameAndExtension, "%s%s.1", pszName, SHLIBEXT );
else
sprintf( pszNameAndExtension, "%s.so.1", pszName );
return pszName;
}
/*!
* \brief Prepends the path used for the plugins.
*
* We use DEFLIB_PATH and if it is not available...
* path may not get prepended.
*
* \param pszPathAndName Output. Needs to be FILENAME_MAX bytes.
* \param pszName Input.
*
* \return char* pszPathAndName is returned for convenience.
*/
char *_prependUIPluginPath( char *pszPathAndName, char *pszName )
{
if ( strlen( DEFLIB_PATH ) > 0 )
sprintf( pszPathAndName, "%s/%s", DEFLIB_PATH, pszName );
else
sprintf( pszPathAndName, "%s", pszName );
return pszPathAndName;
}
/*!
* \brief UI to manage most ODBC system information.
*
* This calls into the UI plugin library to do our work for us. The caller can provide
* the name (base name) of the library or let us determine which library to use.
* See \sa _getUIPluginName for details on how the choice is made.
*
* \param hWnd Input. Parent window handle. This is HWND as per the ODBC
* specification but in unixODBC we use a generic window
* handle. Caller must cast a HODBCINSTWND to HWND at call.
*
* \return BOOL
*
* \sa ODBCINSTWND
*/
BOOL SQLManageDataSources( HWND hWnd )
{
HODBCINSTWND hODBCInstWnd = (HODBCINSTWND)hWnd;
char szName[FILENAME_MAX];
char szNameAndExtension[FILENAME_MAX];
char szPathAndName[FILENAME_MAX];
void * hDLL;
BOOL (*pSQLManageDataSources)(HWND);
inst_logClear();
/* ODBC specification states that hWnd is mandatory. */
if ( !hWnd )
{
inst_logPushMsg( __FILE__, __FILE__, __LINE__, LOG_CRITICAL, ODBC_ERROR_INVALID_HWND, "No hWnd" );
return FALSE;
}
/* initialize libtool */
if ( lt_dlinit() )
{
inst_logPushMsg( __FILE__, __FILE__, __LINE__, LOG_CRITICAL, ODBC_ERROR_GENERAL_ERR, "lt_dlinit() failed" );
return FALSE;
}
lt_dlsetsearchpath(MODULEDIR);
/* get plugin name */
_appendUIPluginExtension( szNameAndExtension, _getUIPluginName( szName, hODBCInstWnd->szUI ) );
/* lets try loading the plugin using an implicit path */
hDLL = lt_dlopen( szNameAndExtension );
if ( hDLL )
{
/* change the name (SQLManageDataSources to ODBCManageDataSources) to prevent us from calling ourself */
pSQLManageDataSources = (BOOL (*)(HWND))lt_dlsym( hDLL, "ODBCManageDataSources" );
if ( pSQLManageDataSources )
return pSQLManageDataSources( ( *(hODBCInstWnd->szUI) ? hODBCInstWnd->hWnd : NULL ) );
else
inst_logPushMsg( __FILE__, __FILE__, __LINE__, LOG_CRITICAL, ODBC_ERROR_GENERAL_ERR, (char*)lt_dlerror() );
}
else
{
inst_logPushMsg( __FILE__, __FILE__, __LINE__, LOG_WARNING, ODBC_ERROR_GENERAL_ERR, (char*)lt_dlerror() );
/* try with explicit path */
_prependUIPluginPath( szPathAndName, szNameAndExtension );
hDLL = lt_dlopen( szPathAndName );
if ( hDLL )
{
/* change the name (SQLManageDataSources to ODBCManageDataSources) to prevent us from calling ourself */
/* its only safe to use hWnd if szUI was specified by the caller */
pSQLManageDataSources = (BOOL (*)(HWND))lt_dlsym( hDLL, "ODBCManageDataSources" );
if ( pSQLManageDataSources )
return pSQLManageDataSources( ( *(hODBCInstWnd->szUI) ? hODBCInstWnd->hWnd : NULL ) );
else
inst_logPushMsg( __FILE__, __FILE__, __LINE__, LOG_CRITICAL, ODBC_ERROR_GENERAL_ERR, (char*)lt_dlerror() );
}
else
inst_logPushMsg( __FILE__, __FILE__, __LINE__, LOG_CRITICAL, ODBC_ERROR_GENERAL_ERR, (char*)lt_dlerror() );
}
/* report failure to caller */
inst_logPushMsg( __FILE__, __FILE__, __LINE__, LOG_CRITICAL, ODBC_ERROR_GENERAL_ERR, "Failed to load/use a UI plugin." );
return FALSE;
}
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