forked from Archive/PX4-Autopilot
151 lines
4.5 KiB
C
151 lines
4.5 KiB
C
/****************************************************************************
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* sched/sched_setupidlefiles.c
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*
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* Copyright (C) 2007-2010, 2012 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 <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sched.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/net/net.h>
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#include "os_internal.h"
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#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NSOCKET_DESCRIPTORS > 0
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Function: sched_setupidlefiles
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*
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* Description:
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* Configure the idle thread's TCB.
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*
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* Parameters:
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* tcb - tcb of the idle task.
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*
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* Return Value:
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* None
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*
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* Assumptions:
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*
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****************************************************************************/
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int sched_setupidlefiles(FAR _TCB *tcb)
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{
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#if CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_DEV_CONSOLE)
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int fd;
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#endif
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#if CONFIG_NFILE_DESCRIPTORS > 0
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/* Allocate file descriptors for the TCB */
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tcb->filelist = files_alloclist();
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if (!tcb->filelist)
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{
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return -ENOMEM;
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}
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#endif /* CONFIG_NFILE_DESCRIPTORS */
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#if CONFIG_NSOCKET_DESCRIPTORS > 0
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/* Allocate socket descriptors for the TCB */
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tcb->sockets = net_alloclist();
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if (!tcb->sockets)
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{
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return -ENOMEM;
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}
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#endif /* CONFIG_NSOCKET_DESCRIPTORS */
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#if CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_DEV_CONSOLE)
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/* Open stdin, dup to get stdout and stderr. This should always
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* be the first file opened and, hence, should always get file
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* descriptor 0.
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*/
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fd = open("/dev/console", O_RDWR);
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if (fd == 0)
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{
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/* Successfully opened /dev/console as stdin (fd == 0) */
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(void)file_dup2(0, 1);
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(void)file_dup2(0, 2);
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}
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else
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{
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/* We failed to open /dev/console OR for some reason, we opened
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* it and got some file descriptor other than 0.
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*/
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if (fd > 0)
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{
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slldbg("Open /dev/console fd: %d\n", fd);
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(void)close(fd);
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}
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else
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{
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slldbg("Failed to open /dev/console: %d\n", errno);
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}
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return -ENFILE;
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}
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#if CONFIG_NFILE_STREAMS > 0
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/* Allocate file strems for the TCB */
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return sched_setupstreams(tcb);
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#else
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return OK;
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#endif /* CONFIG_NFILE_STREAMS */
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#else
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return OK;
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#endif /* CONFIG_NFILE_DESCRIPTORS && CONFIG_DEV_CONSOLE */
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}
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#endif /* CONFIG_NFILE_DESCRIPTORS || CONFIG_NSOCKET_DESCRIPTORS */
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