diff options
Diffstat (limited to 'nuttx/fs/fs_fcntl.c')
| -rw-r--r-- | nuttx/fs/fs_fcntl.c | 264 |
1 files changed, 0 insertions, 264 deletions
diff --git a/nuttx/fs/fs_fcntl.c b/nuttx/fs/fs_fcntl.c deleted file mode 100644 index ff53b0f20..000000000 --- a/nuttx/fs/fs_fcntl.c +++ /dev/null @@ -1,264 +0,0 @@ -/**************************************************************************** - * fs/fs_fcntl.c - * - * Copyright (C) 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 <stdarg.h> -#include <fcntl.h> -#include <errno.h> - -#include <nuttx/fs/fs.h> -#include <nuttx/net/net.h> -#include <nuttx/sched.h> - -#include "fs_internal.h" - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: file_vfcntl - ****************************************************************************/ - -#if CONFIG_NFILE_DESCRIPTORS > 0 -static inline int file_vfcntl(int fildes, int cmd, va_list ap) -{ - FAR struct filelist *list; - FAR struct file *this_file; - int err = 0; - int ret = OK; - - /* Get the thread-specific file list */ - - list = sched_getfiles(); - if (!list) - { - err = EMFILE; - goto errout; - } - - /* Was this file opened ? */ - - this_file = &list->fl_files[fildes]; - if (!this_file->f_inode) - { - err = EBADF; - goto errout; - } - - switch (cmd) - { - case F_DUPFD: - /* Return a new file descriptor which shall be the lowest numbered - * available (that is, not already open) file descriptor greater than - * or equal to the third argument, arg, taken as an integer of type - * int. The new file descriptor shall refer to the same open file - * description as the original file descriptor, and shall share any - * locks. The FD_CLOEXEC flag associated with the new file descriptor - * shall be cleared to keep the file open across calls to one of the - * exec functions. - */ - - { - ret = file_dup(fildes, va_arg(ap, int)); - } - break; - - case F_GETFD: - /* Get the file descriptor flags defined in <fcntl.h> that are associated - * with the file descriptor fildes. File descriptor flags are associated - * with a single file descriptor and do not affect other file descriptors - * that refer to the same file. - */ - - case F_SETFD: - /* Set the file descriptor flags defined in <fcntl.h>, that are associated - * with fildes, to the third argument, arg, taken as type int. If the - * FD_CLOEXEC flag in the third argument is 0, the file shall remain open - * across the exec functions; otherwise, the file shall be closed upon - * successful execution of one of the exec functions. - */ - - err = ENOSYS; - break; - - case F_GETFL: - /* Get the file status flags and file access modes, defined in <fcntl.h>, - * for the file description associated with fildes. The file access modes - * can be extracted from the return value using the mask O_ACCMODE, which is - * defined in <fcntl.h>. File status flags and file access modes are associated - * with the file description and do not affect other file descriptors that - * refer to the same file with different open file descriptions. - */ - - { - ret = this_file->f_oflags; - } - break; - - case F_SETFL: - /* Set the file status flags, defined in <fcntl.h>, for the file description - * associated with fildes from the corresponding bits in the third argument, - * arg, taken as type int. Bits corresponding to the file access mode and - * the file creation flags, as defined in <fcntl.h>, that are set in arg shall - * be ignored. If any bits in arg other than those mentioned here are changed - * by the application, the result is unspecified. - */ - - { - this_file->f_oflags = va_arg(ap, int); - } - break; - - case F_GETOWN: - /* If fildes refers to a socket, get the process or process group ID specified - * to receive SIGURG signals when out-of-band data is available. Positive values - * indicate a process ID; negative values, other than -1, indicate a process group - * ID. If fildes does not refer to a socket, the results are unspecified. - */ - - case F_SETOWN: - /* If fildes refers to a socket, set the process or process group ID specified - * to receive SIGURG signals when out-of-band data is available, using the value - * of the third argument, arg, taken as type int. Positive values indicate a - * process ID; negative values, other than -1, indicate a process group ID. If - * fildes does not refer to a socket, the results are unspecified. - */ - - err = EBADF; /* Only valid on socket descriptors */ - break; - - case F_GETLK: - /* Get the first lock which blocks the lock description pointed to by the third - * argument, arg, taken as a pointer to type struct flock, defined in <fcntl.h>. - * The information retrieved shall overwrite the information passed to fcntl() in - * the structure flock. If no lock is found that would prevent this lock from being - * created, then the structure shall be left unchanged except for the lock type - * which shall be set to F_UNLCK. - */ - - case F_SETLK: - /* Set or clear a file segment lock according to the lock description pointed to - * by the third argument, arg, taken as a pointer to type struct flock, defined in - * <fcntl.h>. F_SETLK can establish shared (or read) locks (F_RDLCK) or exclusive - * (or write) locks (F_WRLCK), as well as to remove either type of lock (F_UNLCK). - * F_RDLCK, F_WRLCK, and F_UNLCK are defined in <fcntl.h>. If a shared or exclusive - * lock cannot be set, fcntl() shall return immediately with a return value of -1. - */ - - case F_SETLKW: - /* This command shall be equivalent to F_SETLK except that if a shared or exclusive - * lock is blocked by other locks, the thread shall wait until the request can be - * satisfied. If a signal that is to be caught is received while fcntl() is waiting - * for a region, fcntl() shall be interrupted. Upon return from the signal handler, - * fcntl() shall return -1 with errno set to [EINTR], and the lock operation shall - * not be done. - */ - - err = ENOSYS; /* Not implemented */ - break; - - default: - err = EINVAL; - break; - } - -errout: - if (err != 0) - { - set_errno(err); - return ERROR; - } - - return ret; -} -#endif /* CONFIG_NFILE_DESCRIPTORS > 0 */ - -/**************************************************************************** - * Global Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: fcntl - ****************************************************************************/ - -int fcntl(int fildes, int cmd, ...) -{ - va_list ap; - int ret; - - /* Setup to access the variable argument list */ - - va_start(ap, cmd); - - /* Did we get a valid file descriptor? */ - -#if CONFIG_NFILE_DESCRIPTORS > 0 - if ((unsigned int)fildes < CONFIG_NFILE_DESCRIPTORS) - { - /* Yes.. defer file operations to file_vfcntl() */ - - ret = file_vfcntl(fildes, cmd, ap); - } - else -#endif - { - /* No... check for operations on a socket descriptor */ - -#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0 - if ((unsigned int)fildes < (CONFIG_NFILE_DESCRIPTORS+CONFIG_NSOCKET_DESCRIPTORS)) - { - /* Yes.. defer socket descriptor operations to net_vfcntl() */ - - ret = net_vfcntl(fildes, cmd, ap); - } - else -#endif - { - /* No.. this descriptor number is out of range */ - - ret = EBADF; - } - } - - va_end(ap); - return ret; -} - |