hpux man page for isastream

isastream(3C)															     isastream(3C)

NAME
       isastream() - determine if a file descriptor refers to a STREAMS device or STREAMS-based pipe

SYNOPSIS
DESCRIPTION
       The function tests whether an open file descriptor (fd) corresponds to a STREAMS device or STREAMS-based pipe.

RETURN VALUE
       Upon successful completion, the function returns a value of 1 when the file descriptor of the open file specified by fd is a STREAMS device
       or STREAMS-based pipe, and 0 (zero) if it is not a stream, but is a valid open file descriptor.	Otherwise, a value of -1 is returned,  and
       is set to indicate the error.

ERRORS
       If any of the following conditions occur, the function sets to the corresponding value:

       [EBADF]	      The specified file descriptor does not refer to a valid open file.

SEE ALSO
       fattach(3C), fdetach(3C), streamio(7).

STANDARDS COMPLIANCE
																     isastream(3C)