text: /*
   * Copyright 2016-2017, Intel Corporation
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *
   *     * 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.
   *
   *     * Neither the name of the copyright holder 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.
   */
  
  /*
   * fork_logging.c -- dummy program, to issue fork via libc
   */
  
  #include <err.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <sched.h>
  #include <sys/wait.h>
  
  #include <pthread.h>
  
  #include "magic_syscalls.h"
  
  static const char *log_parent;
  static const char *log_child;
  
  static void *
  busy(void *arg)
  {
  	FILE *f;
  	const char *path = (const char *)arg;
  	char buffer[0x100];
  	size_t s;
  
  	if ((f = fopen(path, "r")) == NULL)
  		exit(EXIT_FAILURE);
  
  	s = fread(buffer, 1, sizeof(buffer), f);
  	if (s < 4)
  		exit(EXIT_FAILURE);
  	fwrite(buffer, 1, 1, stdout);
  	fflush(stdout);
  	fwrite(buffer, 2, 1, stdout);
  	fflush(stdout);
  	fwrite(buffer, 3, 1, stdout);
  	fflush(stdout);
  	putchar('\n');
  	fflush(stdout);
  	puts("Done being busy here");
  	fflush(stdout);
  	fclose(f);
  
  	magic_syscall_stop_log();
  
  	return NULL;
  }
  
  int
  main(int argc, char *argv[])
  {
  	if (argc < 4)
  		return EXIT_FAILURE;
  
  	log_parent = argv[2];
  	log_child = argv[3];
  
  	magic_syscall_start_log(log_parent, "1");
  
  	int r = fork();
  	if (r < 0)
  		err(EXIT_FAILURE, "fork");
  
  	if (r == 0) {
  		magic_syscall_start_log(log_child, "1");
  		busy(argv[1]);
  	} else {
  		wait(NULL);
  		busy(argv[1]);
  	}
  
  	magic_syscall_stop_log();
  
  	return EXIT_SUCCESS;
  }
  