105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/*
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* Copyright (c) 2021-2021 Huawei Device Co., Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "fs/file.h"
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#include "fs/fd_table.h"
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#include "fs/fs_operation.h"
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#include "sys/types.h"
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#include "sys/uio.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static int FcntlDupFd(int procfd, int leastFd)
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{
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int sysfd = GetAssociatedSystemFd(procfd);
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if ((sysfd < 0) || (sysfd >= CONFIG_NFILE_DESCRIPTORS)) {
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return -EBADF;
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}
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if (CheckProcessFd(leastFd) != OK) {
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return -EINVAL;
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}
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int dupFd = AllocLowestProcessFd(leastFd);
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if (dupFd < 0) {
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return -EMFILE;
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}
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files_refer(sysfd);
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AssociateSystemFd(dupFd, sysfd);
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return dupFd;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int VfsFcntl(int procfd, int cmd, ...)
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{
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va_list ap;
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int ret = 0;
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va_start(ap, cmd);
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switch (cmd) {
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case F_DUPFD:
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{
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int arg = va_arg(ap, int);
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ret = FcntlDupFd(procfd, arg);
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}
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break;
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case F_GETFD:
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{
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bool isCloexec = CheckCloexecFlag(procfd);
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ret = isCloexec ? FD_CLOEXEC : 0;
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}
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break;
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case F_SETFD:
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{
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int oflags = va_arg(ap, int);
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if (oflags & FD_CLOEXEC) {
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SetCloexecFlag(procfd);
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} else {
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ClearCloexecFlag(procfd);
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}
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}
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break;
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default:
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ret = CONTINE_NUTTX_FCNTL;
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break;
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}
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va_end(ap);
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return ret;
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}
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