2ad5349d4c
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5628 42af7a65-404d-4744-a932-0658087f49c3
105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/****************************************************************************
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* examples/ostest/vfork.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 <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include "ostest.h"
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#if defined(CONFIG_ARCH_HAVE_VFORK) && defined(CONFIG_SCHED_WAITPID) && \
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!defined(CONFIG_DISABLE_SIGNALS)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static volatile bool g_vforkchild;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int vfork_test(void)
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{
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pid_t pid;
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g_vforkchild = false;
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pid = vfork();
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if (pid == 0)
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{
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/* There is not very much that the child is permitted to do. Perhaps
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* it can just set g_vforkchild.
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*/
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g_vforkchild = true;
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exit(0);
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}
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else if (pid < 0)
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{
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printf("vfork_test: vfork() failed: %d\n", errno);
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return -1;
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}
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else
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{
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sleep(1);
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if (g_vforkchild)
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{
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printf("vfork_test: Child %d ran successfully\n", pid);
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}
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else
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{
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printf("vfork_test: ERROR Child %d did not run\n", pid);
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return -1;
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}
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}
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return 0;
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}
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#endif /* CONFIG_ARCH_HAVE_VFORK && CONFIG_SCHED_WAITPID && !CONFIG_DISABLE_SIGNALS */
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