Re: [PATCH] mingw: make isatty() recognize MSYS2's pseudo terminals (/dev/pty*)

> From: Karsten Blees <blees@dcon.de>
> 
> MSYS2 emulates pseudo terminals via named pipes, and isatty() returns 0
> for such file descriptors. Therefore, some interactive functionality
> (such as launching a pager, asking if a failed unlink should be repeated
> etc.) doesn't work when run in a terminal emulator that uses MSYS2's
> ptys (such as mintty).
> 
> However, MSYS2 uses special names for its pty pipes ('msys-*-pty*'),
> which allows us to distinguish them from normal piped input / output.
> 
> On startup, check if stdin / stdout / stderr are connected to such pipes
> using the NtQueryObject API from NTDll.dll. If the names match, adjust
> the flags in MSVCRT's ioinfo structure accordingly.
> 
> Signed-off-by: Karsten Blees <blees@dcon.de>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>