mingw: accommodate for BusyBox' assumptions about isatty()

On Windows, isatty(fd) determines whether the file descriptor refers to
a character device.

The thing is: even NUL or a printer is a character device. BusyBox
thinks, however, that isatty() only returns non-zero for an interactive
terminal.

So let's shadow isatty() by a version that answers the question BusyBox
wants to have answered.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Ron Yorston <rmy@pobox.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/mingw.h b/include/mingw.h
index 197b3519a..ff5e8ee1e 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -420,6 +420,7 @@ int mingw_unlink(const char *pathname);
 NOIMPL(vfork,void);
 int mingw_access(const char *name, int mode);
 int mingw_rmdir(const char *name);
+int mingw_isatty(int fd);
 
 #define dup2 mingw_dup2
 #define getcwd mingw_getcwd
@@ -432,6 +433,7 @@ int mingw_rmdir(const char *name);
 
 #undef access
 #define access mingw_access
+#define isatty mingw_isatty
 
 /*
  * utime.h