1c52dce216
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5724 42af7a65-404d-4744-a932-0658087f49c3
107 lines
4.0 KiB
C
107 lines
4.0 KiB
C
/****************************************************************************
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* libc/string/lib_psfa_adddup2.c
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written 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
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdlib.h>
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#include <spawn.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/spawn.h>
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#include "lib_internal.h"
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/****************************************************************************
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* Global Functions
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****************************************************************************/
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/****************************************************************************
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* Name: posix_spawn_file_actions_adddup2
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*
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* Description:
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* The posix_spawn_file_actions_adddup2() function adds a dup2 operation to
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* the list of operations associated with the object referenced by
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* file_actions, for subsequent use in a call to posix_spawn() or
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* posix_spawnp(). The descriptor referred to by fd2 is created as
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* if dup2() had been called on fd1 prior to the new child process
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* starting execution.
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*
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* Input Parameters:
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* file_actions - The posix_spawn_file_actions_t to append the action.
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* fd1 - The first file descriptor to be argument to dup2.
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* fd2 - The first file descriptor to be argument to dup2.
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*
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* Returned Value:
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* On success, these functions return 0; on failure they return an error
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* number from <errno.h>.
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*
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****************************************************************************/
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int posix_spawn_file_actions_adddup2(FAR posix_spawn_file_actions_t *file_actions,
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int fd1, int fd2)
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{
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FAR struct spawn_dup2_file_action_s *entry;
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DEBUGASSERT(file_actions &&
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fd1 >= 0 && fd1 < CONFIG_NFILE_DESCRIPTORS &&
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fd2 >= 0 && fd2 < CONFIG_NFILE_DESCRIPTORS);
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/* Allocate the action list entry */
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entry = (FAR struct spawn_dup2_file_action_s *)
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lib_zalloc(sizeof(struct spawn_close_file_action_s));
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if (!entry)
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{
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return ENOMEM;
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}
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/* Initialize the file action entry */
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entry->action = SPAWN_FILE_ACTION_DUP2;
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entry->fd1 = fd1;
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entry->fd2 = fd2;
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/* And add it to the file action list */
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add_file_action(file_actions, (FAR struct spawn_general_file_action_s *)entry);
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return OK;
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}
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