From 8dac052af443ca14fac6d343b22113fb1d19cd1b Mon Sep 17 00:00:00 2001
From: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 15 Dec 2004 08:05:10 +0000
Subject: * win32/win32.[ch] (rb_w32_isatty): new function to replace MSVCRT's 
  isatty because it never sets errno. (backported from CVS HEAD)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@7565 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 win32/win32.c | 14 ++++++++++++++
 win32/win32.h |  3 +++
 2 files changed, 17 insertions(+)

(limited to 'win32')

diff --git a/win32/win32.c b/win32/win32.c
index a4cea9b287..f44b805ae6 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -3322,6 +3322,20 @@ rb_w32_snprintf(char *buf, size_t size, const char *format, ...)
     return ret;
 }
 
+int
+rb_w32_isatty(int fd)
+{
+    if (!(_osfile(fd) & FOPEN)) {
+	errno = EBADF;
+	return 0;
+    }
+    if (!(_osfile(fd) & FDEV)) {
+	errno = ENOTTY;
+	return 0;
+    }
+    return 1;
+}
+
 //
 // Fix bcc32's stdio bug
 //
diff --git a/win32/win32.h b/win32/win32.h
index d7222fc1b1..a7995a083b 100644
--- a/win32/win32.h
+++ b/win32/win32.h
@@ -125,6 +125,8 @@ extern "C++" {
 #define stat(path,st)		rb_w32_stat(path,st)
 #undef execv
 #define execv(path,argv)	do_aspawn(P_OVERLAY,path,argv)
+#undef isatty
+#define isatty(h)		rb_w32_isatty(h)
 
 #ifdef __MINGW32__
 struct timezone {
@@ -181,6 +183,7 @@ extern int do_spawn(int, char *);
 extern int do_aspawn(int, char *, char **);
 extern int kill(int, int);
 extern pid_t rb_w32_getpid(void);
+extern int rb_w32_isatty(int);
 
 #ifdef __BORLANDC__
 extern FILE *rb_w32_fopen(const char *, const char *);
-- 
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