Detect console streams more reliably on Windows
commit95dc6b770de10b78e029628e4e27fed1e635ebd7
authorKarsten Blees <blees@dcon.de>
Sat, 31 Jul 2010 00:04:02 +0000 (31 00:04 +0000)
committerPat Thoyts <patthoyts@users.sourceforge.net>
Sun, 24 Apr 2011 23:42:30 +0000 (25 00:42 +0100)
treed94bd18e4f4ff27f864f18203e37cf13d6887132
parentc2ba388343bfb9039f4dd05053a9ba35f255bb49
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