2008-09-12 14:46:44 +00:00
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/****************************************************************************
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2014-09-28 11:46:11 -06:00
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* fs/vfs/fs_dup.c
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2007-02-17 23:21:28 +00:00
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*
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2021-02-03 14:47:23 +01:00
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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2007-02-17 23:21:28 +00:00
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*
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2021-02-03 14:47:23 +01:00
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* http://www.apache.org/licenses/LICENSE-2.0
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2007-02-17 23:21:28 +00:00
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*
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2021-02-03 14:47:23 +01:00
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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2007-02-17 23:21:28 +00:00
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*
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2008-09-12 14:46:44 +00:00
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****************************************************************************/
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2007-02-17 23:21:28 +00:00
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2008-09-12 14:46:44 +00:00
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/****************************************************************************
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2007-02-17 23:21:28 +00:00
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* Included Files
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2008-09-12 14:46:44 +00:00
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****************************************************************************/
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2007-02-17 23:21:28 +00:00
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#include <nuttx/config.h>
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#include <unistd.h>
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#include <sched.h>
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2021-05-18 14:59:14 +08:00
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#include <assert.h>
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2007-02-17 23:21:28 +00:00
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#include <errno.h>
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2023-01-30 22:12:30 +08:00
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#include <fcntl.h>
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2009-06-15 18:58:22 +00:00
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2012-03-21 18:01:07 +00:00
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#include <nuttx/fs/fs.h>
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2014-09-29 07:14:38 -06:00
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#include "inode/inode.h"
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2007-02-17 23:21:28 +00:00
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2008-09-12 14:46:44 +00:00
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/****************************************************************************
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2015-10-02 16:30:35 -06:00
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* Public Functions
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2008-09-12 14:46:44 +00:00
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****************************************************************************/
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2007-02-17 23:21:28 +00:00
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2021-01-03 01:50:00 +08:00
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/****************************************************************************
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* Name: file_dup
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*
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* Description:
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* Equivalent to the standard dup() function except that it
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* accepts a struct file instance instead of a file descriptor.
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*
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* Returned Value:
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* The new file descriptor is returned on success; a negated errno value
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* is returned on any failure.
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*
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****************************************************************************/
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2023-01-30 22:12:30 +08:00
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int file_dup(FAR struct file *filep, int minfd, bool cloexec)
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2021-01-03 01:50:00 +08:00
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{
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struct file filep2;
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int fd2;
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int ret;
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/* Let file_dup2() do the real work */
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memset(&filep2, 0, sizeof(filep2));
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ret = file_dup2(filep, &filep2);
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if (ret < 0)
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{
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return ret;
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}
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/* Then allocate a new file descriptor for the inode */
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2023-01-30 22:12:30 +08:00
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if (cloexec)
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{
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filep2.f_oflags |= O_CLOEXEC;
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}
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2022-10-26 17:45:19 +08:00
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fd2 = file_allocate(filep2.f_inode, filep2.f_oflags,
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2022-10-26 18:15:16 +08:00
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filep2.f_pos, filep2.f_priv, minfd, false);
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2021-01-03 01:50:00 +08:00
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if (fd2 < 0)
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{
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file_close(&filep2);
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return fd2;
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}
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return fd2;
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}
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2009-06-15 18:58:22 +00:00
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/****************************************************************************
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2022-10-26 17:28:39 +08:00
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* Name: dup
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2009-06-15 18:58:22 +00:00
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*
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* Description:
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2022-10-26 17:28:39 +08:00
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* Clone a file or socket descriptor to an arbitrary descriptor number
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2009-06-15 18:58:22 +00:00
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*
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****************************************************************************/
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2022-10-26 17:28:39 +08:00
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int dup(int fd)
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2007-02-17 23:21:28 +00:00
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{
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2021-02-23 18:04:13 +08:00
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FAR struct file *filep;
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int ret;
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2021-01-03 01:50:00 +08:00
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2021-02-23 18:04:13 +08:00
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/* Get the file structure corresponding to the file descriptor. */
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2021-01-03 01:50:00 +08:00
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2021-02-23 18:04:13 +08:00
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ret = fs_getfilep(fd, &filep);
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if (ret < 0)
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{
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2022-10-26 17:28:39 +08:00
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goto err;
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2021-02-23 18:04:13 +08:00
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}
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2021-01-03 01:50:00 +08:00
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2021-02-23 18:04:13 +08:00
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DEBUGASSERT(filep != NULL);
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2021-01-03 01:50:00 +08:00
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2021-02-23 18:04:13 +08:00
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/* Let file_dup() do the real work */
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2009-07-19 00:14:46 +00:00
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2023-01-30 22:12:30 +08:00
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ret = file_dup(filep, 0, 0);
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2020-05-04 03:07:01 +08:00
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if (ret < 0)
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{
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2022-10-26 17:28:39 +08:00
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goto err;
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2007-02-17 23:21:28 +00:00
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}
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2012-07-14 21:05:40 +00:00
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2009-07-19 00:14:46 +00:00
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return ret;
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2022-10-26 17:28:39 +08:00
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err:
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set_errno(-ret);
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return ERROR;
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2007-02-17 23:21:28 +00:00
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}
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