#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

#define ACCTFILE	"/tmp/mypacct"

main()
{
	int  fd;
	char buf[1024];

	if ( (fd = open(ACCTFILE, O_RDWR|O_CREAT|O_TRUNC, 0777)) == -1)
	{
		perror("Open " ACCTFILE);
		exit(1);
	}

	if (acct(ACCTFILE) == -1)
	{
		perror("Switch on accounting");
		exit(1);
	}

	if ( fork() == 0 )	// fork new process
		exit(0);	// child process: finish


	// parent process:
	//	wait for child to finish

	wait((int *)0);

	// 	read the process accounting record of the finished child

	while (read(fd, buf, sizeof buf) == 0)
	{
		printf("No process accounting record yet....\n");
		sleep(1);
	}

	printf("Yeeeeah, found a process accounting record!\n");
}