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Linux 2.6 - man page for isastream (linux section 3posix)

ISASTREAM(P)			    POSIX Programmer's Manual			     ISASTREAM(P)

NAME
       isastream - test a file descriptor (STREAMS)

SYNOPSIS
       #include <stropts.h>

       int isastream(int fildes);

DESCRIPTION
       The isastream() function shall test whether fildes, an open file descriptor, is associated
       with a STREAMS-based file.

RETURN VALUE
       Upon successful completion, isastream() shall return 1 if fildes refers to a STREAMS-based
       file  and  0 if not.  Otherwise, isastream() shall return -1 and set errno to indicate the
       error.

ERRORS
       The isastream() function shall fail if:

       EBADF  The fildes argument is not a valid open file descriptor.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       The Base Definitions volume of IEEE Std 1003.1-2001, <stropts.h>

COPYRIGHT
       Portions of this text are reprinted and	reproduced  in	electronic  form  from	IEEE  Std
       1003.1,	2003  Edition,	Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE  and  The  Open  Group
       Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				     ISASTREAM(P)


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