New subject: GetStdHandle Problem

20 Feb 2002


      I have inspected wine source code and found the following information:
environ.c implements the function as follows:
HANDLE http://www.winehq.com/source/memory/ident?i=HANDLE WINAPI http://www.winehq.com/source/memory/ident?i=WINAPI GetStdHandle http://www.winehq.com/source/memory/ident?i=GetStdHandle( DWORD http://www.winehq.com/source/memory/ident?i=DWORD std_handle )
609 http://www.winehq.com/source/memory/source/memory/environ.c#L609 {
610 http://www.winehq.com/source/memory/source/memory/environ.c#L610     switch(std_handle)
611 http://www.winehq.com/source/memory/source/memory/environ.c#L611     {
612 http://www.winehq.com/source/memory/source/memory/environ.c#L612         case STD_INPUT_HANDLE http://www.winehq.com/source/memory/ident?i=STD_INPUT_HANDLE:  return current_envdb http://www.winehq.com/source/memory/ident?i=current_envdb.hStdin;
613 http://www.winehq.com/source/memory/source/memory/environ.c#L613         case STD_OUTPUT_HANDLE http://www.winehq.com/source/memory/ident?i=STD_OUTPUT_HANDLE: return current_envdb http://www.winehq.com/source/memory/ident?i=current_envdb.hStdout;
614 http://www.winehq.com/source/memory/source/memory/environ.c#L614         case STD_ERROR_HANDLE http://www.winehq.com/source/memory/ident?i=STD_ERROR_HANDLE:  return current_envdb http://www.winehq.com/source/memory/ident?i=current_envdb.hStderr;
615 http://www.winehq.com/source/memory/source/memory/environ.c#L615     }
616 http://www.winehq.com/source/memory/source/memory/environ.c#L616     SetLastError( ERROR_INVALID_PARAMETER http://www.winehq.com/source/memory/ident?i=ERROR_INVALID_PARAMETER );
617 http://www.winehq.com/source/memory/source/memory/environ.c#L617     return INVALID_HANDLE_VALUE http://www.winehq.com/source/memory/ident?i=INVALID_HANDLE_VALUE;
618 http://www.winehq.com/source/memory/source/memory/environ.c#L618 }
619 http://www.winehq.com/source/memory/source/memory/environ.c#L619
So the function returns current_envdb.hStdin. or current_envdb.hStdout.
Inspecting current_envdb structure also in environ.c:
92 http://www.winehq.com/source/memory/source/memory/environ.c#L92 ENVDB http://www.winehq.com/source/memory/ident?i=ENVDB current_envdb http://www.winehq.com/source/memory/ident?i=current_envdb =
 93 http://www.winehq.com/source/memory/source/memory/environ.c#L93 {
 94 http://www.winehq.com/source/memory/source/memory/environ.c#L94     0,                       /* environ */
 95 http://www.winehq.com/source/memory/source/memory/environ.c#L95     0,                       /* unknown1 */
 96 http://www.winehq.com/source/memory/source/memory/environ.c#L96     0,                       /* cmd_line */
 97 http://www.winehq.com/source/memory/source/memory/environ.c#L97     0,                       /* cur_dir */
 98 http://www.winehq.com/source/memory/source/memory/environ.c#L98     &current_startupinfo http://www.winehq.com/source/memory/ident?i=current_startupinfo,    /* startup_info */
 99 http://www.winehq.com/source/memory/source/memory/environ.c#L99     0,                       /* hStdin */
100 http://www.winehq.com/source/memory/source/memory/environ.c#L100     0,                       /* hStdout */
101 http://www.winehq.com/source/memory/source/memory/environ.c#L101     0,                       /* hStderr */
102 http://www.winehq.com/source/memory/source/memory/environ.c#L102     0,                       /* unknown2 */
103 http://www.winehq.com/source/memory/source/memory/environ.c#L103     0,                       /* inherit_console */
104 http://www.winehq.com/source/memory/source/memory/environ.c#L104     0,                       /* break_type */
105 http://www.winehq.com/source/memory/source/memory/environ.c#L105     0,                       /* break_sem */
106 http://www.winehq.com/source/memory/source/memory/environ.c#L106     0,                       /* break_event */
107 http://www.winehq.com/source/memory/source/memory/environ.c#L107     0,                       /* break_thread */
108 http://www.winehq.com/source/memory/source/memory/environ.c#L108     0                        /* break_handlers */
109 http://www.winehq.com/source/memory/source/memory/environ.c#L109 };
hStdin and hStdout are always 0. So that's the value the function always 
will return. I've tested it in Win32 enviroment and returns a number 
corresponding to the specific handler for each call. 7 and 8 are the 
usual numbers. I could supose 0 as a valid number in wine, but 
FlushConsoleInputBuffer(conhanin) fails and tells me I'm using a wrong 
handler.
Does anyone know more about this GetStdHandle implementation ?
Why is current_envdb set to 0 values ?
Thanks in advance, Ignasi Villagrasa.

Re:GetStdHandle Problem