2001-01-05 Joel Sherrill <joel@OARcorp.com>

* devnull: New addition. Moved from libcpu/sh. * devnull/devnull.c, devnull/devnull.h, devnull/.cvsignore, devnull/Makefile.am: New files. * Makefile.am, configure.in, wrapup/Makefile.am: Modified to reflect addition of above.
2026-09-23 14:25:52 +08:00 · 2001-01-05 13:26:51 +00:00
parent 0589f0b74b
commit 85d03e28c7
15 changed files with 605 additions and 4 deletions
@@ -0,0 +1,174 @@
+/*  /dev/null
+ *
+ *  Derived from rtems' stub driver.
+ *
+ *  Author: Ralf Corsepius (corsepiu@faw.uni-ulm.de)
+ *
+ *  COPYRIGHT (c) 1989-2000.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <rtems.h>
+#include <rtems/devnull.h>
+#include <rtems/libio.h>
+
+/*  null_initialize
+ *
+ *  This routine is the null device driver init routine.
+ *
+ *  Input parameters:
+ *    major - device major number
+ *    minor - device minor number
+ *    pargp - pointer to parameter block
+ *
+ *  Output parameters:
+ *    rval       - NULL_SUCCESSFUL
+ */
+
+rtems_unsigned32 NULL_major;
+
+rtems_device_driver null_initialize(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  rtems_device_driver status ;
+  
+  status = rtems_io_register_name(
+    "/dev/null",
+    major,
+    (rtems_device_minor_number) 0
+    );
+
+  if (status != RTEMS_SUCCESSFUL)
+    rtems_fatal_error_occurred(status);
+      
+  NULL_major = major;
+  
+  return RTEMS_SUCCESSFUL;
+}
+
+/*  null_open
+ *
+ *  This routine is the null device driver open routine.
+ *
+ *  Input parameters:
+ *    major - device major number
+ *    minor - device minor number
+ *    pargb - pointer to open parameter block
+ *
+ *  Output parameters:
+ *    rval       - NULL_SUCCESSFUL
+ */
+
+rtems_device_driver null_open(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  return NULL_SUCCESSFUL;
+}
+
+
+/*  null_close
+ *
+ *  This routine is the null device driver close routine.
+ *
+ *  Input parameters:
+ *    major - device major number
+ *    minor - device minor number
+ *    pargb - pointer to close parameter block
+ *
+ *  Output parameters:
+ *    rval       - NULL_SUCCESSFUL
+ */
+
+rtems_device_driver null_close(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  return NULL_SUCCESSFUL;
+}
+
+
+/*  null_read
+ *
+ *  This routine is the null device driver read routine.
+ *
+ *  Input parameters:
+ *    major - device major number
+ *    minor - device minor number
+ *    pargp - pointer to read parameter block
+ *
+ *  Output parameters:
+ *    rval       - NULL_SUCCESSFUL
+ */
+
+rtems_device_driver null_read(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  return NULL_SUCCESSFUL;
+}
+
+
+/*  null_write
+ *
+ *  This routine is the null device driver write routine.
+ *
+ *  Input parameters:
+ *    major - device major number
+ *    minor - device minor number
+ *    pargp - pointer to write parameter block
+ *
+ *  Output parameters:
+ *    rval       - NULL_SUCCESSFUL
+ */
+
+rtems_device_driver null_write(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *) pargp ;
+  
+  rw_args->bytes_moved = rw_args->count ;
+  
+  return NULL_SUCCESSFUL;
+}
+
+
+/*  null_control
+ *
+ *  This routine is the null device driver control routine.
+ *
+ *  Input parameters:
+ *    major - device major number
+ *    minor - device minor number
+ *    pargp - pointer to cntrl parameter block
+ *
+ *  Output parameters:
+ *    rval       - NULL_SUCCESSFUL
+ */
+
+rtems_device_driver null_control(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  return NULL_SUCCESSFUL;
+}