/**************************************************************************** * examples/ostest/restart.c * * Copyright (C) 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #include #include #include #include #include #include #include #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 }; #ifndef CONFIG_DISABLE_ENVIRON static const char g_varname[] = "VarName"; static const char g_varvalue[] = "VarValue"; #endif 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"); }