Linux 2.6 - man page for isastream (linux section 3posix)
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ISASTREAM(P) POSIX Programmer's Manual ISASTREAM(P)
isastream - test a file descriptor (STREAMS)
int isastream(int fildes);
The isastream() function shall test whether fildes, an open file descriptor, is associated
with a STREAMS-based file.
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
The isastream() function shall fail if:
EBADF The fildes argument is not a valid open file descriptor.
The following sections are informative.
The Base Definitions volume of IEEE Std 1003.1-2001, <stropts.h>
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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