4.3BSD - /usr/src/lib/libc/gen/isatty.c

   1: #if defined(LIBC_SCCS) && !defined(lint)
   2: static char sccsid[] = "@(#)isatty.c	5.2 (Berkeley) 3/9/86";
   3: #endif LIBC_SCCS and not lint
   4: 
   5: /*
   6:  * Returns 1 iff file is a tty
   7:  */
   8: 
   9: #include <sgtty.h>
  10: 
  11: isatty(f)
  12: {
  13:     struct sgttyb ttyb;
  14: 
  15:     if (ioctl(f, TIOCGETP, &ttyb) < 0)
  16:         return(0);
  17:     return(1);
  18: }

Defined functions

Defined variables