2010-06-24 Joel Sherrill <joel.sherrilL@OARcorp.com>

	* libcsupport/src/read.c, libcsupport/src/write.c: read(2) and write(2)
	should return 0 when passed a count of 0 after verifying other
	possible errors.

1 files changed, 3 insertions, 1 deletions

diff --git a/cpukit/libcsupport/src/write.c b/cpukit/libcsupport/src/write.c
index 3bda204015..0193466bd5 100644
--- a/cpukit/libcsupport/src/write.c
+++ b/cpukit/libcsupport/src/write.c
@@ -41,10 +41,12 @@ ssize_t write(
   rtems_libio_check_count( count );
   rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE );
 
+  if ( count == 0 )
+    return 0;
+
   /*
    *  Now process the write() request.
    */
-
   if ( !iop->handlers->write_h )
     rtems_set_errno_and_return_minus_one( ENOTSUP );