14a3c35917
it's wrong to return file_dup2 directly since file_dup2 never return file handle Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: I943537849c75d83b3d646a6a22f035187d9fd521
96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
/****************************************************************************
|
|
* fs/vfs/fs_dupfd2.c
|
|
*
|
|
* Copyright (C) 2007-2009, 2011-2014, 2017 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 <unistd.h>
|
|
#include <sched.h>
|
|
#include <errno.h>
|
|
|
|
#include "inode/inode.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: fs_dupfd2
|
|
*
|
|
* Description:
|
|
* Clone a file descriptor to a specific descriptor number.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success; a negated errno value is return on
|
|
* any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int fs_dupfd2(int fd1, int fd2)
|
|
{
|
|
FAR struct file *filep1;
|
|
FAR struct file *filep2 = NULL;
|
|
int ret;
|
|
|
|
/* Get the file structures corresponding to the file descriptors. */
|
|
|
|
ret = fs_getfilep(fd1, &filep1);
|
|
if (ret >= 0)
|
|
{
|
|
ret = fs_getfilep(fd2, &filep2);
|
|
}
|
|
|
|
if (ret < 0)
|
|
{
|
|
return ret;
|
|
}
|
|
|
|
DEBUGASSERT(filep1 != NULL && filep2 != NULL);
|
|
|
|
/* Perform the dup2 operation */
|
|
|
|
ret = file_dup2(filep1, filep2);
|
|
if (ret < 0)
|
|
{
|
|
return ret;
|
|
}
|
|
|
|
return fd2;
|
|
}
|