.\"
.\" $Id: kernStatus.2,v 1.1 1997/02/27 07:32:14 gdr Exp $
.\"
.TH KERNSTATUS 2 "29 January 1997" GNO "System Calls"
.SH NAME
.BR kernStatus ,
.BR kernVersion 
\- detect presence and version of GNO kernel
.SH SYNOPSIS
#include <gno/gno.h>
.sp 1
int
\fBkernStatus\fR (void);
.br
int
\fBkernVersion\fR (void);
.SH DESCRIPTION
.BR kernStatus
can be used to determine whether or not the GNO kernel is active.
You may use this function to abort programs that use GNO-specific features,
or to allow them to enable non-GNO environment-specific code.
.LP
If the GNO kernel is not active, the global variable
.BR _toolErr
will be non-zero on return from
.BR kernStatus .
This value is also accessible through the function
.BR toolerror (3).
C programmers may prefer to use
.BR needsgno (3)
for brevity.
.LP
.BR kernVersion
returns the kernel version in the same fashion as the standard IIgs
ToolBox calls.  For example, a return value of
.B 0x0201
indicates a version of 
.BR 2.1 .
.LP
Note that both of these functions are inline system calls; you
.IR must
include the <gno/gno.h> header or they will wind up as being
unresolved symbols when your program is linked.
.SH SEE ALSO
.BR needsgno (2),
.BR toolerror (3),
the
.IR "GNO Kernel Reference Manual" .