isastream(3c) [hpux man page]

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)

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)