diff options
Diffstat (limited to 'cpukit/libmisc/devnull/devzero.c')
-rw-r--r-- | cpukit/libmisc/devnull/devzero.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/cpukit/libmisc/devnull/devzero.c b/cpukit/libmisc/devnull/devzero.c new file mode 100644 index 0000000000..621d9a02fe --- /dev/null +++ b/cpukit/libmisc/devnull/devzero.c @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2011 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Obere Lagerstr. 30 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <rtems/devzero.h> + +#include <string.h> + +#include <rtems/libio.h> + +rtems_device_driver dev_zero_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor __attribute__((unused)), + void *arg __attribute__((unused)) +) +{ + return rtems_io_register_name(DEVZERO_DEVICE_NAME, major, 0); +} + +rtems_device_driver dev_zero_open( + rtems_device_major_number major __attribute__((unused)), + rtems_device_minor_number minor __attribute__((unused)), + void *arg __attribute__((unused)) +) +{ + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver dev_zero_close( + rtems_device_major_number major __attribute__((unused)), + rtems_device_minor_number minor __attribute__((unused)), + void *arg __attribute__((unused)) +) +{ + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver dev_zero_read( + rtems_device_major_number major __attribute__((unused)), + rtems_device_minor_number minor __attribute__((unused)), + void *arg __attribute__((unused)) +) +{ + rtems_libio_rw_args_t *rw = arg; + + rw->bytes_moved = rw->count; + memset(rw->buffer, 0, rw->count); + + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver dev_zero_write( + rtems_device_major_number major __attribute__((unused)), + rtems_device_minor_number minor __attribute__((unused)), + void *arg +) +{ + rtems_libio_rw_args_t *rw = arg; + + rw->bytes_moved = rw->count; + + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver dev_zero_control( + rtems_device_major_number major __attribute__((unused)), + rtems_device_minor_number minor __attribute__((unused)), + void *arg __attribute__((unused)) +) +{ + return RTEMS_IO_ERROR; +} |