opensolaris man page for isastream

isastream(3C)						   Standard C Library Functions 					     isastream(3C)

NAME
       isastream - test a file descriptor

SYNOPSIS
       #include <stropts.h>

       int isastream(int fildes);

DESCRIPTION
       The  isastream() function determines if a file descriptor represents a STREAMS file. The fildes argument refers to an open file descriptor.

RETURN VALUES
       Upon  successful  completion, isastream() returns 1 if fildes represents a STREAMS file, and 0 if it does not.  Otherwise, -1 is return and
       errno is set to indicate the error.

ERRORS
       The isastream() function will fail if:

       EBADF	The fildes argument is not a valid file descriptor.

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

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

SEE ALSO
       attributes(5), , standards(5), streamio(7I)

       STREAMS Programming Guide

SunOS 5.11							    24 Jul 2002 						     isastream(3C)