isastream(S)
isastream --
test a file descriptor
Syntax
cc ...-lc
#include <stropts.h>
int isastream(int fildes);
Description
The function
isastream(S)
determines if a file descriptor represents
a STREAMS file.
fildes refers to an open file.
Return values
If successful,
isastream( )
returns 1 if
fildes represents a STREAMS file, and 0 if not.
On failure,
isastream( )
returns -1 with errno set to indicate an error.
Diagnostics
Under the following conditions,
isastream( )
fails and sets errno to:
[EBADF]-
fildes is not a valid open file.
See also
streamio(M)
Standards conformance
isastream(S)
is conformant with:
X/Open CAE Specification, System Interfaces and Headers, Issue 4, Version 2.
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003