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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 cor‐
       responding 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)

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