#include <stdio.h>
main()
{
char *s;
checktty(&s);
printf("%s\n",s);
}



int checktty(char **tname)
{
*tname=ttyname(0);

printf("%s\n",*tname);
 if (strstr(*tname,"pty")) 
	{
	return -1;
	}
 else return 0;
}