NetBSD/share/man/man9/kcopy.9

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.\" $NetBSD: kcopy.9,v 1.5 2006/04/04 20:48:21 wiz Exp $
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.\" by Gregory McGarry.
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.Dd April 4, 2006
.Dt KCOPY 9
.Os
.Sh NAME
.Nm kcopy
.Nd copy data with abort on page fault
.Sh SYNOPSIS
.In sys/systm.h
.Ft int
.Fn kcopy "const void *src" "void *dst" "size_t len"
.Sh DESCRIPTION
.Fn kcopy
copies
.Fa len
bytes from
.Fa src
to
.Fa dst ,
aborting if a fatal page fault is encountered.
.Pp
.Fn kcopy
must save and restore the old fault handler since it is called by
.Xr uiomove 9 ,
which may be in the path of servicing a non-fatal page fault.
.Fn kcopy
returns 0 on success and an error number on failure.
.Sh SEE ALSO
.Xr errno 2 ,
.Xr memcpy 9 ,
.Xr uiomove 9