ttynam(3f) [bsd man page]

TTYNAM(3F)																TTYNAM(3F)

NAME

       ttynam, isatty - find name of a terminal port

SYNOPSIS

       character*(*) function ttynam (lunit)

       logical function isatty (lunit)

DESCRIPTION

       Ttynam returns a blank padded path name of the terminal device associated with logical unit lunit.

       Isatty returns .true.  if lunit is associated with a terminal device, .false.  otherwise.

FILES

       /dev/*
       /usr/lib/libU77.a

DIAGNOSTICS

       Ttynam returns an empty string (all blanks) if lunit is not associated with a terminal device in directory `/dev'.

4.2 Berkeley Distribution					   May 15, 1985 							TTYNAM(3F)

isatty(3C)						   Standard C Library Functions 						isatty(3C)

NAME

       isatty - test for a terminal device

SYNOPSIS

       #include <unistd.h>

       int isatty(int fildes);

DESCRIPTION

       The isatty() function tests whether fildes, an open file descriptor, is associated with a terminal device.

RETURN VALUES

       The isatty() function returns 1 if fildes is associated with a terminal; otherwise it returns 0 and may set errno to indicate the error.

ERRORS

       The isatty() function may fail if:

       EBADF	       The fildes argument is not a valid open file descriptor.

       ENOTTY	       The fildes argument is not associated with a terminal.

USAGE

       The  isatty()  function does not necessarily indicate that a human being is available for interaction via fildes. It is quite possible that
       non-terminal devices are connected to the communications line.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ttyname(3C), attributes(5), standards(5)

SunOS 5.10							    24 Jul 2002 							isatty(3C)