isastream(3C)
NAME
isastream − test a file descriptor
SYNOPSIS
#include <stropts.h>
int isastream(int fildes);
DESCRIPTION
The function isastream() determines if a file descriptor represents a STREAMS file. fildes refers to an open file descriptor.
RETURN VALUES
If successful, isastream() returns 1 if fildes represents a STREAMS file, and 0 if not. On failure, isastream() returns −1 with errno set to indicate an error.
ERRORS
Under the following conditions, isastream() fails and sets errno to:
EBADF fildes is not a valid file descriptor.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| MT-Level | MT-Safe |
SEE ALSO
STREAMS Programming Guide
SunOS 5.6 — Last change: 29 Dec 1996