BSD 4_3_Tahoe release

[unix-history] / usr / src / lib / libc / gen / isatty.c

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)isatty.c    5.2 (Berkeley) 3/9/86";
#endif LIBC_SCCS and not lint

/*
* Returns 1 iff file is a tty
*/

#include <sgtty.h>

isatty(f)
{
       struct sgttyb ttyb;

       if (ioctl(f, TIOCGETP, &ttyb) < 0)
               return(0);
       return(1);
}