usa	2008-12-05 18:08:24 +0900 (Fri, 05 Dec 2008)

  New Revision: 20539

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=20539

  Log:
    * win32/win32.c (rb_w32_read, rb_w32_write, rb_w32_isatty): check
      whether fd is valid.

  Modified files:
    trunk/ChangeLog
    trunk/win32/win32.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 20538)
+++ ChangeLog	(revision 20539)
@@ -1,3 +1,8 @@
+Fri Dec  5 18:07:32 2008  NAKAMURA Usaku  <usa@r...>
+
+	* win32/win32.c (rb_w32_read, rb_w32_write, rb_w32_isatty): check
+	  whether fd is valid.
+
 Fri Dec  5 13:05:45 2008  Nobuyoshi Nakada  <nobu@r...>
 
 	* iseq.c (rb_iseq_parameters): proc arguments are always optional.
Index: win32/win32.c
===================================================================
--- win32/win32.c	(revision 20538)
+++ win32/win32.c	(revision 20539)
@@ -4316,6 +4316,10 @@
     if (is_socket(sock))
 	return rb_w32_recv(fd, buf, size, 0);
 
+    // validate fd by using _get_osfhandle() because we cannot access _nhandle
+    if (_get_osfhandle(fd) == -1) {
+	return -1;
+    }
     if (!(_osfile(fd) & FOPEN)) {
 	errno = EBADF;
 	return -1;
@@ -4434,6 +4438,10 @@
     if (is_socket(sock))
 	return rb_w32_send(fd, buf, size, 0);
 
+    // validate fd by using _get_osfhandle() because we cannot access _nhandle
+    if (_get_osfhandle(fd) == -1) {
+	return -1;
+    }
     if (!(_osfile(fd) & FOPEN)) {
 	errno = EBADF;
 	return -1;
@@ -4686,6 +4694,10 @@
 int
 rb_w32_isatty(int fd)
 {
+    // validate fd by using _get_osfhandle() because we cannot access _nhandle
+    if (_get_osfhandle(fd) == -1) {
+	return 0;
+    }
     if (!(_osfile(fd) & FOPEN)) {
 	errno = EBADF;
 	return 0;

--
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