isatty man page on SmartOS

isatty man page on SmartOS

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ISATTY(3C)							    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	termi‐
       nal; 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)

				 Jul 24, 2002			    ISATTY(3C)

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