'\" te
.\" Copyright (c) 2002, Sun Microsystems, Inc. All Rights Reserved.
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.TH STACK_GETBOUNDS 3C "Jul 18, 2002"
.SH NAME
stack_getbounds \- retrieve stack boundaries
.SH SYNOPSIS
.LP
.nf
#include <ucontext.h>

\fBint\fR \fBstack_getbounds\fR(\fBstack_t *\fR\fIsp\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBstack_getbounds()\fR function retrieves the stack boundaries that the
calling thread is currently operating on. If the thread is currently operating
on the alternate signal stack, this function will retrieve the bounds of that
stack.
.sp
.LP
If successful, \fBstack_getbounds()\fR sets the \fBss_sp\fR member of the
\fBstack_t\fR structure pointed to by \fIsp\fR to the base of the stack region
and the \fBss_size\fR member to its size (maximum extent) in bytes. The
\fBss_flags\fR member is set to \fBSS_ONSTACK\fR if the calling thread is
executing on its alternate signal stack, and zero otherwise.
.SH RETURN VALUES
.sp
.LP
Upon successful completion, \fBstack_getbounds()\fR returns 0. Otherwise, \(mi1
is returned and \fBerrno\fR is set to indicate the error.
.SH ERRORS
.sp
.LP
The \fBstack_getbounds()\fR function will fail if:
.sp
.ne 2
.na
\fB\fBEFAULT\fR\fR
.ad
.RS 10n
The \fIsp\fR argument does not refer to a valid address.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Evolving
_
MT-Level	Async-Signal-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBgetustack\fR(2), \fBsigaction\fR(2), \fBsigaltstack\fR(2),
\fBstack_setbounds\fR(3C), \fBattributes\fR(5)