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/****************************************************************************
* 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 <nuttx/spawn.h>
#include "lib_internal.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 *)
lib_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;
}
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