| /**************************************************************************** |
| * 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 unless we were restarted */ |
| } |
| |
| /**************************************************************************** |
| * 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"); |
| } |