isastream(3C)							 isastream(3C)

NAME    [Toc]    [Back]

     isastream - test a	file descriptor

SYNOPSIS    [Toc]    [Back]

     #include <sys/stropts.h>

     int isastream(int fildes);

DESCRIPTION    [Toc]    [Back]

     The function isastream() determines if a file descriptor represents a
     STREAMS file.  fildes refers to an	open file.

RETURN VALUE    [Toc]    [Back]

     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.

ERRORS    [Toc]    [Back]

     Under the following conditions, isastream() fails and sets	errno to:

     EBADF	  fildes is not	a valid	open file.

SEE ALSO    [Toc]    [Back]

     streamio(7)


									PPPPaaaaggggeeee 1111