diff options
Diffstat (limited to 'nuttx/fs/fs_read.c')
| -rw-r--r-- | nuttx/fs/fs_read.c | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/nuttx/fs/fs_read.c b/nuttx/fs/fs_read.c deleted file mode 100644 index 30dd4af03..000000000 --- a/nuttx/fs/fs_read.c +++ /dev/null @@ -1,147 +0,0 @@ -/**************************************************************************** - * fs_read.c - * - * Copyright (C) 2007-2009, 2012 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 <sys/socket.h> - -#include <unistd.h> -#include <fcntl.h> -#include <sched.h> -#include <errno.h> - -#include "fs_internal.h" - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -#if CONFIG_NFILE_DESCRIPTORS > 0 -static inline ssize_t file_read(int fd, FAR void *buf, size_t nbytes) -{ - FAR struct filelist *list; - int ret = -EBADF; - - /* Get the thread-specific file list */ - - list = sched_getfiles(); - if (!list) - { - /* Failed to get the file list */ - - ret = -EMFILE; - } - - /* Were we given a valid file descriptor? */ - - else if ((unsigned int)fd < CONFIG_NFILE_DESCRIPTORS) - { - FAR struct file *this_file = &list->fl_files[fd]; - FAR struct inode *inode = this_file->f_inode; - - /* Yes.. Was this file opened for read access? */ - - if ((this_file->f_oflags & O_RDOK) == 0) - { - /* No.. File is not read-able */ - - ret = -EACCES; - } - - /* Is a driver or mountpoint registered? If so, does it support - * the read method? - */ - - else if (inode && inode->u.i_ops && inode->u.i_ops->read) - { - /* Yes.. then let it perform the read. NOTE that for the case - * of the mountpoint, we depend on the read methods bing - * identical in signature and position in the operations vtable. - */ - - ret = (int)inode->u.i_ops->read(this_file, (char*)buf, (size_t)nbytes); - } - } - - /* If an error occurred, set errno and return -1 (ERROR) */ - - if (ret < 0) - { - set_errno(-ret); - return ERROR; - } - - /* Otherwise, return the number of bytes read */ - - return ret; -} -#endif - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -ssize_t read(int fd, FAR void *buf, size_t nbytes) -{ - /* Did we get a valid file descriptor? */ - -#if CONFIG_NFILE_DESCRIPTORS > 0 - if ((unsigned int)fd >= CONFIG_NFILE_DESCRIPTORS) -#endif - { - /* No.. If networking is enabled, read() is the same as recv() with - * the flags parameter set to zero. - */ - -#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0 - return recv(fd, buf, nbytes, 0); -#else - /* No networking... it is a bad descriptor in any event */ - - set_errno(EBADF); - return ERROR; -#endif - } - - /* The descriptor is in a valid range to file descriptor... do the read */ - -#if CONFIG_NFILE_DESCRIPTORS > 0 - return file_read(fd, buf, nbytes); -#endif -} |