tty.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

static	char	*sccsid = "@(#)tty.c	4.1	(ULTRIX)	7/17/90";
/*
 * Type tty name
 */

char	*ttyname();

main(argc, argv)
char **argv;
{
	register char *p;

	p = ttyname(0);
	if(argc==2 && !strcmp(argv[1], "-s"))
		;
	else
		printf("%s\n", (p? p: "not a tty"));
	exit(p? 0: 1);
}