#ifndef _BSD_SOURCE
#define _BSD_SOURCE
#endif

#include <pty.h>

#include <utmp.h>
#include <errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>

#include <Python.h>


int main(int argc, char *argv[])
{
	if (argc < 2)
	{
	fprintf(stderr, "%s [terminal command...]\n", argv[0]);
	return 1;
	}


	int master = -1, slave = -1, outcome = 0;

	openpty(&master, &slave, NULL, NULL, NULL);
	pid_t process = fork();


	if (process < 0)
	{
	fprintf(stderr, "error allocating ptty: %s\n", strerror(errno));
	return 1;
	}


	else if (process != 0)
	{
	close(master);
	FILE *terminal = fdopen((slave = slave), "a+");


	Py_InitializeEx(0);

	PyRun_SimpleString("import sys, os");

	char redirect[128];

	snprintf(redirect, sizeof redirect, "sys.stdin = os.fdopen(%i, \"r\")", (int) slave);
	PyRun_SimpleString(redirect);
	snprintf(redirect, sizeof redirect, "sys.stdout = os.fdopen(%i, \"w\")", (int) slave);
	PyRun_SimpleString(redirect);
	snprintf(redirect, sizeof redirect, "sys.stderr = os.fdopen(%i, \"w\")", (int) slave);
	PyRun_SimpleString(redirect);

	PyRun_SimpleString("import readline");


	fprintf(terminal, "***** Interactive Python Terminal (%i on %s) *****\n", getpid(), ttyname(slave));
	outcome = PyRun_InteractiveLoop(terminal, "<python terminal>");

	fclose(terminal);

	PyRun_SimpleString("sys.stdin  = sys.__stdin__");
	PyRun_SimpleString("sys.stdout = sys.__stdout__");
	PyRun_SimpleString("sys.stderr = sys.__stderr__");

	Py_Finalize();
	}


	else
	{
	//run xterm

	close(slave);
	login_tty(master);
	execvp(argv[1], argv + 1);
	fprintf(stderr, "execvp error: %s\n", strerror(errno));
	_exit(0);
	}


	return 0;
}