isastream(3) [osf1 man page]

isastream(3)						     Library Functions Manual						      isastream(3)

NAME

       isastream - Determines if a file descriptor refers to a STREAMS file

LIBRARY

       Standard C Library (libc.so, libc.a)

SYNOPSIS

       #include <stropts.h>
       int isastream(	   int fildes);

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       isastream():  XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS

       Specifies a file descriptor of an open STREAMS file.

DESCRIPTION

       The isastream() function tests whether a file descriptor it encounters is actually a STREAMS file.

RETURN VALUES

       Upon  successful completion, the isastream() function returns a value of 1 when the file descriptor of the open file specified by fildes is
       a STREAMS file, and it returns a value of 0 (zero) if it is not a STREAMS file.	Otherwise, a value of -1 is returned, and errno is set	to
       indicate the error.

ERRORS

       If  any	of  the  following conditions occur, the isastream() function sets errno to the corresponding value: The specified file descriptor
       does not refer to a valid open file.

RELATED INFORMATION

       Functions: fattach(3), fdetach(3)

       Interfaces: streamio(7)

       Standards: standards(5) delim off

																      isastream(3)

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 5.10                                                          24 Jul 2002                                                      isastream(3C)