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/****************************************************************************
* examples/ostest/restart.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 <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sched.h>
#include <errno.h>
#include "ostest.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define PRIORITY 100
#define NARGS 3
/****************************************************************************
* Private Data
****************************************************************************/
static char * const g_argv[NARGS+1] =
{
"This is argument 1",
"Argument 2 here",
"Lastly, the 3rd argument",
NULL
};
static const char g_varname[] = "VarName";
static const char g_varvalue[] = "VarValue";
static bool g_restarted;
/****************************************************************************
* Private Functions
****************************************************************************/
#ifdef CONFIG_BUILD_KERNEL
int main(int argc, FAR char *argv[])
#else
static int restart_main(int argc, char *argv[])
#endif
{
#ifndef CONFIG_DISABLE_ENVIRON
char *actual;
#endif
int i;
printf("restart_main: Started with argc=%d\n", argc);
/* Verify passed arguments */
if (argc != NARGS + 1)
{
printf("restart_main: ERROR: Expected argc=%d got argc=%d\n",
NARGS+1, argc);
}
for (i = 0; i <= NARGS; i++)
{
printf("restart_main: argv[%d]=\"%s\"\n", i, argv[i]);
if (i > 0 && strcmp(argv[i], g_argv[i-1]) != 0)
{
printf("restart_main: ERROR: Expected argv[%d]=\"%s\" got \"%s\"\n",
i, argv[i], g_argv[i-1]);
}
}
#ifndef CONFIG_DISABLE_ENVIRON
actual = getenv(g_varname);
if (actual)
{
if (strcmp(actual, g_varvalue) == 0)
{
printf("restart_main: Variable=%s has value=%s\n", g_varname,
g_varvalue);
}
else
{
printf("restart_main: ERROR Variable=%s has the wrong value\n", g_varname);
printf("restart_main: found=%s expected=%s\n", actual, g_varvalue);
}
}
else
{
printf("restart_main: ERROR: Variable=%s has no value\n", g_varname);
}
#endif
/* Were we restarted? */
if (!g_restarted)
{
/* No.. this is the first time we have been here */
g_restarted = true;
/* Now just wait to be restarted */
for (;;)
{
sleep(2);
printf("restart_main: I am still here\n");
}
}
return 0; /* Won't get here */
}
/****************************************************************************
* Public Functions
****************************************************************************/
void restart_test(void)
{
int ret;
/* Start the children and wait for first one to complete */
printf("\nTest task_restart()\n");
g_restarted = false;
/* Set up an environment variables */
#ifndef CONFIG_DISABLE_ENVIRON
printf("restart_main: setenv(%s, %s, TRUE)\n", g_varname, g_varvalue);
setenv(g_varname, g_varvalue, TRUE); /* Variable1=GoodValue1 */
#endif
/* Start the task */
ret = task_create("ostest", PRIORITY, STACKSIZE, restart_main, g_argv);
if (ret < 0)
{
printf("restart_main: ERROR Failed to start restart_main\n");
}
else
{
pid_t pid = ret;
printf("restart_main: Started restart_main at PID=%d\n", pid);
/* Wait a bit and restart the task */
sleep(5);
ret = task_restart(pid);
if (ret < 0)
{
printf("restart_main: ERROR: task_restart failed\n");
}
sleep(1);
}
printf("restart_main: Exiting\n");
}
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