diff options
Diffstat (limited to 'nuttx/drivers/dev_null.c')
-rw-r--r-- | nuttx/drivers/dev_null.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/nuttx/drivers/dev_null.c b/nuttx/drivers/dev_null.c deleted file mode 100644 index c70370e1e..000000000 --- a/nuttx/drivers/dev_null.c +++ /dev/null @@ -1,135 +0,0 @@ -/**************************************************************************** - * drivers/dev_null.c - * - * Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <sys/types.h> -#include <stdbool.h> -#include <string.h> -#include <poll.h> -#include <errno.h> -#include <nuttx/fs/fs.h> - -/**************************************************************************** - * Private Function Prototypes - ****************************************************************************/ - -static ssize_t devnull_read(FAR struct file *, FAR char *, size_t); -static ssize_t devnull_write(FAR struct file *, FAR const char *, size_t); -#ifndef CONFIG_DISABLE_POLL -static int devnull_poll(FAR struct file *filp, FAR struct pollfd *fds, - bool setup); -#endif - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -static const struct file_operations devnull_fops = -{ - 0, /* open */ - 0, /* close */ - devnull_read, /* read */ - devnull_write, /* write */ - 0, /* seek */ - 0 /* ioctl */ -#ifndef CONFIG_DISABLE_POLL - , devnull_poll /* poll */ -#endif -}; - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: devnull_read - ****************************************************************************/ - -static ssize_t devnull_read(FAR struct file *filp, FAR char *buffer, size_t len) -{ - return 0; /* Return EOF */ -} - -/**************************************************************************** - * Name: devnull_write - ****************************************************************************/ - -static ssize_t devnull_write(FAR struct file *filp, FAR const char *buffer, size_t len) -{ - return len; /* Say that everything was written */ -} - -/**************************************************************************** - * Name: devnull_poll - ****************************************************************************/ - -#ifndef CONFIG_DISABLE_POLL -static int devnull_poll(FAR struct file *filp, FAR struct pollfd *fds, - bool setup) -{ - if (setup) - { - fds->revents |= (fds->events & (POLLIN|POLLOUT)); - if (fds->revents != 0) - { - sem_post(fds->sem); - } - } - - return OK; -} -#endif - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: devnull_register - * - * Description: - * Register /dev/null - * - ****************************************************************************/ - -void devnull_register(void) -{ - (void)register_driver("/dev/null", &devnull_fops, 0666, NULL); -} |