[BZ #5998]

2008-04-09  Ulrich Drepper  <drepper@redhat.com>
	[BZ #5998]
	* libio/iofwrite.c (_IO_fwrite): Return correct count if flushing
	in line-buffered stream failed.
	* libio/iofwrite_u.c (fwrite_unlocked): Likewise.

2 files changed, 12 insertions, 4 deletions

diff --git a/libio/iofwrite.c b/libio/iofwrite.c
index 1f4331cc83..fb91d6f776 100644
--- a/libio/iofwrite.c
+++ b/libio/iofwrite.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1993, 1996, 1997, 1998, 1999, 2000, 2002, 2003
+/* Copyright (C) 1993, 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2008
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
@@ -44,7 +44,11 @@ _IO_fwrite (buf, size, count, fp)
   if (_IO_vtable_offset (fp) != 0 || _IO_fwide (fp, -1) == -1)
     written = _IO_sputn (fp, (const char *) buf, request);
   _IO_release_lock (fp);
-  if (written == request)
+  /* We have written all of the input in case the return value indicates
+     this or EOF is returned.  The latter is a special case where we
+     simply did not manage to flush the buffer.  But the data is in the
+     buffer and therefore written as far as fwrite is concerned.  */
+  if (written == request || written == EOF)
     return count;
   else
     return written / size;
diff --git a/libio/iofwrite_u.c b/libio/iofwrite_u.c
index 738cc5b28f..d27c02ac31 100644
--- a/libio/iofwrite_u.c
+++ b/libio/iofwrite_u.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1993, 1996-2000, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 1996-2000, 2002, 2008 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -45,7 +45,11 @@ fwrite_unlocked (buf, size, count, fp)
   if (_IO_fwide (fp, -1) == -1)
     {
       written = _IO_sputn (fp, (const char *) buf, request);
-      if (written == request)
+      /* We have written all of the input in case the return value indicates
+	 this or EOF is returned.  The latter is a special case where we
+	 simply did not manage to flush the buffer.  But the data is in the
+	 buffer and therefore written as far as fwrite is concerned.  */
+      if (written == request || written == EOF)
 	return count;
     }