[FFmpeg-devel] [PATCH] avutil/file_open: avoid file handle inheritance on Windows

[Tobias Rapp]

On 29.10.2015 09:38, Tobias Rapp wrote:
> Attached patch fixes file lock issues in my Windows application when a
> child process is started with handle inheritance enabled (standard
> input/output redirection) while a FFmpeg transcoding is running in the
> parent process.
>
> BTW: It would be great if the patch could also be applied to the 2.7/2.8
> release branches.

Forgot to add links relevant to the subject.

[1] https://msdn.microsoft.com/en-us/library/w7sa2b22.aspx

Describes the _wsopen() function and the O_NOINHERIT flag. File handles 
opened by _wsopen() are inheritable by default.

[2] 
https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858%28v=vs.85%29.aspx

Describes the CreateFile() function. Not directly relevant here, often 
used in cases outside of C/libc. Opens file without inheritance by 
default (lpSecurityAttributes is NULL).

[3] 
https://msdn.microsoft.com/en-us/library/windows/desktop/ms682425%28v=vs.85%29.aspx

Describes handle inheritance when creating new processes. Handle 
inheritance must be enabled (bInheritHandles = TRUE) e.g. when you want 
to pass handles for stdin/stdout via lpStartupInfo.

Regards,
Tobias