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/*
* SPDX license identifier: MPL-2.0
*
* Copyright (C) 2015 Intel Corporation
*
* This file is part of GENIVI Project DLT - Diagnostic Log and Trace.
*
* This Source Code Form is subject to the terms of the
* Mozilla Public License (MPL), v. 2.0.
* If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/.
*
* For further information see http://www.genivi.org/.
*/
/*!
* \author Stefan Vacek <stefan.vacek@intel.com> Intel Corporation
*
* \copyright Copyright © 2015 Intel Corporation. \n
* License MPL-2.0: Mozilla Public License version 2.0 http://mozilla.org/MPL/2.0/.
*
* \file dlt-test-fork-handler.c
*/
#include <unistd.h> /* for fork() */
#include <time.h>
#include <errno.h>
#include "dlt.h"
void dlt_log_message(DltContext *context, DltLogLevelType ll, char *text, int32_t num)
{
DltContextData contextData;
if (text == NULL)
return;
if (dlt_user_log_write_start(context, &contextData, ll) > 0) {
dlt_user_log_write_string(&contextData, text);
if (num > 0) {
dlt_user_log_write_int32(&contextData, num);
}
dlt_user_log_write_finish(&contextData);
}
return;
}
/**
* @brief sample code for using at_fork-handler
*/
int main()
{
DltContext mainContext;
struct timespec timeout, r;
timeout.tv_sec = 0;
timeout.tv_nsec = 200000000L;
dlt_register_app("PRNT", "Parent application");
dlt_register_context(&mainContext, "CTXP", "Parent context");
dlt_log_message(&mainContext, DLT_LOG_WARN, "First message before fork", 0);
nanosleep(&timeout, &r);
pid_t pid = fork();
if (pid == 0) { /* child process */
/* this message should not be visible */
dlt_log_message(&mainContext, DLT_LOG_WARN, "Child's first message after fork, pid: ", getpid());
/* this will not register CHLD application */
dlt_register_app("CHLD", "Child application");
/* this will not register CTXC context */
dlt_register_context(&mainContext, "CTXC", "Child context");
/* this will not log a message */
dlt_log_message(&mainContext, DLT_LOG_WARN, "Child's second message after fork, pid: ", getpid());
nanosleep(&timeout, &r);
if (execlp("dlt-example-user", "dlt-example-user", "-n 1",
"you should see this message", NULL))
return errno;
}
else if (pid == -1) /* error in fork */
{
return -1;
}
else { /* parent */
dlt_log_message(&mainContext, DLT_LOG_WARN, "Parent's first message after fork, pid: ", getpid());
nanosleep(&timeout, &r);
}
dlt_unregister_app();
return 0;
}
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