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

void Fatal(const char *Msg)
{
	perror(Msg);
	exit(1);
}

volatile sig_atomic_t SigttouHandled=0;
void SigttouHandler(int Arg)
{
	SigttouHandled=1;
}

int main(int argc, char *argv[])
{

	pid_t ChildPid=fork();
	if(ChildPid==0)
	{
#if 1
		if(signal(SIGTTOU, SIG_IGN)==SIG_ERR)
			Fatal("ignoring SIGTTOU");
#elif 0
		if(signal(SIGTTOU, SIG_DFL)==SIG_ERR)
			Fatal("defaulting SIGTTOU");
#else
		if(signal(SIGTTOU, SigttouHandler)==SIG_ERR)
			Fatal("SIGTTOU handler setup");
#endif
		if(setpgid(0,0))
			Fatal("setpgid()");
		int Fd=open(ctermid(NULL), O_RDONLY);
		if(Fd<0)
			Fatal("open(ctermid(),))");
		if(tcsetpgrp(Fd, getpgid(0)))
			Fatal("tcsetpgrp()");
		printf("child done\n");
	}
	else if(ChildPid<0)
		Fatal("fork()");
	else
	{
		int ChildStatus;
		if(wait(&ChildStatus)<0)
			Fatal("wait()");
		if(WIFCONTINUED(ChildStatus))
			printf("child has continued\n");
		else if(WIFEXITED(ChildStatus))
			printf("child has exited\n");
		else if(WIFSIGNALED(ChildStatus))
			printf("child was terminated\n");
		else if(WIFSTOPPED(ChildStatus))
			printf("child was stoped\n");
		printf("End of parent process\n");
	}
	return 0;
}