bug#16444: grep -r fails with "Bad file descriptor" for mingw-w64

[Stephan T. Lavavej]

Hi,

I'm building grep 2.16 with mingw-w64, and it works (with color!) for
grepping individual files, but not recursively:

C:\Temp\gcc>build\src\grep --version
build\src\grep (GNU grep) 2.16
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Mike Haertel and others, see
<http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>.

C:\Temp\gcc>dir /s /b somedir
C:\Temp\gcc\somedir\somefile.txt

C:\Temp\gcc>type somedir\somefile.txt
one
two
three

C:\Temp\gcc>build\src\grep -r two somedir
build\src\grep: somedir: Bad file descriptor

My installer-free build environment is available from
http://nuwen.net/mingw.html ; if necessary, I can provide exact instructions
to replicate my build (but I'm just running configure and make without any
extra options or local patches).

I've observed this since grep 2.11, also with mingw.org, so I don't believe
this is specific to mingw-w64.

Thanks,
STL