2 files changed, 13 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index fe4ee3e501..2a6ea96ba8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Dec 20 12:42:17 2004  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* io.c (io_fwrite): workaround for MSVCRT's bug.
+	  fixed: [ruby-core:03982]
+
 Mon Dec 20 11:21:04 2004  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* io.c (rb_io_eof): check if closed before clearerr().
diff --git a/io.c b/io.c
index f6ea3a1154..7e4de96334 100644
--- a/io.c
+++ b/io.c
@@ -431,6 +431,14 @@ io_fwrite(str, fptr)
 	) {
 #ifdef __hpux
 	    if (!errno) errno = EAGAIN;
+#elif defined(_WIN32) && !defined(__BORLANDC__)
+	    /* workaround for MSVCRT's bug */
+	    if (!errno) {
+		if (GetLastError() == ERROR_NO_DATA)
+		    errno = EPIPE;
+		else
+		    errno = EBADF;
+	    }
 #endif
 	    if (rb_io_wait_writable(fileno(f))) {
 		rb_io_check_closed(fptr);