Re: [bug #20495] debug version crashes on windows on close(-1)

[Gurpreet Sachdeva]

Is there any fix/patch for this?

-Gurpreet


Caeies-3 wrote:
> 
> 
> URL:
>   <http://savannah.gnu.org/bugs/?20495>
> 
>                  Summary: debug version crashes on windows on close(-1)
>                  Project: make
>             Submitted by: tstuefe
>             Submitted on: Monday 07/16/2007 at 07:49
>                 Severity: 3 - Normal
>               Item Group: Bug
>                   Status: None
>                  Privacy: Public
>              Assigned to: None
>              Open/Closed: Open
>          Discussion Lock: Any
>        Component Version: 3.81
>         Operating System: MS Windows
>            Fixed Release: None
> 
>     _______________________________________________________
> 
> Details:
> 
> I build gnumake and run it on windows. When executing a command ($(shell
> ..),
> the command executes, but afterwards make crashes because the MS debug
> C-Runtime detects a close(-1) and throws an error.
> 
> When debugging, I saw that the offending close was at 
> function.c:1687 
>       /* Close the write side of the pipe.  */
>       (void) close (pipedes[1]);
> 
> pipedes[1] is -1, pipedes[0] is a valid file handle.
> 
> A workaround at this point would be a if(pipedes[1]!=-1) close(..)
> 
> ...
> 
> When debugging further, I looked at the function "windows32_openpipe".
> What
> happens is that the child process spawns fine, but the line 1490:
> pipedes[1] = _open_osfhandle((long) hChildOutWr, O_APPEND);
> sets pipedes[1] to -1.
> 
> I actually don't get this coding, but maybe its me. What I don't
> understand
> is how the stdin to the child process is supposed to work at all. Parent
> hands down its own duplicated stdin to the child 
> (see line 1471, "hProcess = process_init_fd(hIn, hChildOutWr, 
> hErr);"
> and later on tries to get an OS handle for the write end of the child's
> stdout pipe (line 1490)? 
> As I said, maybe I simply don't get it. Microsoft's example for
> stdio-redirection looks different:
> 
> http://support.microsoft.com/kb/190351
> "How to spawn console processes with redirected standard handles"
> 
> Best Regards,
> 
> Thomas Stuefe
> 
> 
> 
> 
>     _______________________________________________________
> 
> Reply to this item at:
> 
>   <http://savannah.gnu.org/bugs/?20495>
> 
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