Detect console streams more reliably on Windows
commit5c8c2ba401930ec6c9c9afa7d75bdd06d54d8d45
authorKarsten Blees <blees@dcon.de>
Sat, 31 Jul 2010 00:04:02 +0000 (31 00:04 +0000)
committerPat Thoyts <patthoyts@users.sourceforge.net>
Tue, 19 Jun 2012 22:29:40 +0000 (19 23:29 +0100)
tree1cf2a3dbefc4c421a9bae8dc4872982c927ca184
parenta7b67659a829879c0d3ab1cb0a805f559fdab739
Detect console streams more reliably on Windows

GetStdHandle(STD_OUTPUT_HANDLE) doesn't work for stderr if stdout is
redirected. Use _get_osfhandle of the FILE* instead.

_isatty() is true for all character devices (including parallel and serial
ports). Check return value of GetConsoleScreenBufferInfo instead to
reliably detect console handles (also don't initialize internal state from
an uninitialized CONSOLE_SCREEN_BUFFER_INFO structure if the function
fails).

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
compat/winansi.c