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-rw-r--r--lib/libc/string/memcpy.322
1 files changed, 15 insertions, 7 deletions
diff --git a/lib/libc/string/memcpy.3 b/lib/libc/string/memcpy.3
index 1deb03631b1..e95d670ad9d 100644
--- a/lib/libc/string/memcpy.3
+++ b/lib/libc/string/memcpy.3
@@ -1,3 +1,5 @@
+.\" $OpenBSD: memcpy.3,v 1.8 2011/07/25 00:38:52 schwarze Exp $
+.\"
.\" Copyright (c) 1990, 1991 The Regents of the University of California.
.\" All rights reserved.
.\"
@@ -29,9 +31,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.\" $OpenBSD: memcpy.3,v 1.7 2007/05/31 19:19:32 jmc Exp $
-.\"
-.Dd $Mdocdate: May 31 2007 $
+.Dd $Mdocdate: July 25 2011 $
.Dt MEMCPY 3
.Os
.Sh NAME
@@ -60,18 +60,26 @@ function returns the original value of
.Xr memccpy 3 ,
.Xr memmove 3 ,
.Xr strcpy 3 ,
-.Xr strlcpy 3
+.Xr strlcpy 3 ,
+.Xr wmemcpy 3
.Sh STANDARDS
The
.Fn memcpy
function conforms to
.St -ansiC .
-.Sh BUGS
+.Sh HISTORY
+The
+.Fn memcpy
+function first appeared in
+.At V
+and was reimplemented for
+.Bx 4.3 Tahoe .
+.Sh CAVEATS
In this implementation
.Fn memcpy
is implemented using
.Xr bcopy 3 ,
and therefore the buffers may overlap.
On other systems, copying overlapping buffers may produce surprises.
-A simpler solution is to not use
-.Fn memcpy .
+A portable, safe solution is to use
+.Xr memmove 3 .