isastream(3p) - phpMan

ISASTREAM(3P)              POSIX Programmer's Manual             ISASTREAM(3P)
PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
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
       The isastream() function may be removed in a future version.
SEE ALSO
       The Base Definitions volume of POSIX.1-2008, <stropts.h>
COPYRIGHT
       Portions  of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri-
       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  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.unix.org/online.html .
       Any typographical or formatting errors that appear  in  this  page  are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors,  see  https://www.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                        ISASTREAM(3P)