isastream(3p) - phpMan

ISASTREAM(P)                                                      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  original  Standard  can   be   obtained   online   at
       http://www.opengroup.org/unix/online.html .



POSIX                                2003                         ISASTREAM(P)

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