forked from Archive/PX4-Autopilot
105 lines
3.9 KiB
C
105 lines
3.9 KiB
C
/****************************************************************************
|
|
* libc/string/lib_psfa_adddup2.c
|
|
*
|
|
* Copyright (C) 2013 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 <stdlib.h>
|
|
#include <spawn.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
|
|
#include "spawn/spawn.h"
|
|
|
|
/****************************************************************************
|
|
* Global Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: posix_spawn_file_actions_adddup2
|
|
*
|
|
* Description:
|
|
* The posix_spawn_file_actions_adddup2() function adds a dup2 operation to
|
|
* the list of operations associated with the object referenced by
|
|
* file_actions, for subsequent use in a call to posix_spawn() or
|
|
* posix_spawnp(). The descriptor referred to by fd2 is created as
|
|
* if dup2() had been called on fd1 prior to the new child process
|
|
* starting execution.
|
|
*
|
|
* Input Parameters:
|
|
* file_actions - The posix_spawn_file_actions_t to append the action.
|
|
* fd1 - The first file descriptor to be argument to dup2.
|
|
* fd2 - The first file descriptor to be argument to dup2.
|
|
*
|
|
* Returned Value:
|
|
* On success, these functions return 0; on failure they return an error
|
|
* number from <errno.h>.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int posix_spawn_file_actions_adddup2(FAR posix_spawn_file_actions_t *file_actions,
|
|
int fd1, int fd2)
|
|
{
|
|
FAR struct spawn_dup2_file_action_s *entry;
|
|
|
|
DEBUGASSERT(file_actions &&
|
|
fd1 >= 0 && fd1 < CONFIG_NFILE_DESCRIPTORS &&
|
|
fd2 >= 0 && fd2 < CONFIG_NFILE_DESCRIPTORS);
|
|
|
|
/* Allocate the action list entry */
|
|
|
|
entry = (FAR struct spawn_dup2_file_action_s *)
|
|
zalloc(sizeof(struct spawn_close_file_action_s));
|
|
|
|
if (!entry)
|
|
{
|
|
return ENOMEM;
|
|
}
|
|
|
|
/* Initialize the file action entry */
|
|
|
|
entry->action = SPAWN_FILE_ACTION_DUP2;
|
|
entry->fd1 = fd1;
|
|
entry->fd2 = fd2;
|
|
|
|
/* And add it to the file action list */
|
|
|
|
add_file_action(file_actions, (FAR struct spawn_general_file_action_s *)entry);
|
|
return OK;
|
|
}
|