diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 2013-06-04 03:02:10 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 2013-06-04 03:02:10 +0000 |
| commit | e7b137311a900a0a5e9db9105140885bb91a22b9 (patch) | |
| tree | d9e9a3e3760b87077e5f90f864bce845475e62be /lib/libc/string | |
| parent | d3069a814ed9e5c5a0f00b7f3cde17e658b59098 (diff) | |
remove some incredible lies about overlapping buffers
ok guenther
Diffstat (limited to 'lib/libc/string')
| -rw-r--r-- | lib/libc/string/memcpy.3 | 16 | ||||
| -rw-r--r-- | lib/libc/string/wmemcpy.3 | 16 |
2 files changed, 10 insertions, 22 deletions
diff --git a/lib/libc/string/memcpy.3 b/lib/libc/string/memcpy.3 index e95d670ad9d..51c458ee3ec 100644 --- a/lib/libc/string/memcpy.3 +++ b/lib/libc/string/memcpy.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: memcpy.3,v 1.8 2011/07/25 00:38:52 schwarze Exp $ +.\" $OpenBSD: memcpy.3,v 1.9 2013/06/04 03:02:09 deraadt Exp $ .\" .\" Copyright (c) 1990, 1991 The Regents of the University of California. .\" All rights reserved. @@ -31,7 +31,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.Dd $Mdocdate: July 25 2011 $ +.Dd $Mdocdate: June 4 2013 $ .Dt MEMCPY 3 .Os .Sh NAME @@ -50,6 +50,9 @@ bytes from buffer .Fa src to buffer .Fa dst . +If the two buffers may overlap, +.Xr memmove 3 +must be used instead. .Sh RETURN VALUES The .Fn memcpy @@ -74,12 +77,3 @@ 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 portable, safe solution is to use -.Xr memmove 3 . diff --git a/lib/libc/string/wmemcpy.3 b/lib/libc/string/wmemcpy.3 index 1102640ad4f..4bbab2909fc 100644 --- a/lib/libc/string/wmemcpy.3 +++ b/lib/libc/string/wmemcpy.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: wmemcpy.3,v 1.3 2011/07/25 00:38:53 schwarze Exp $ +.\" $OpenBSD: wmemcpy.3,v 1.4 2013/06/04 03:02:09 deraadt Exp $ .\" .\" Copyright (c) 1990, 1991 The Regents of the University of California. .\" All rights reserved. @@ -31,7 +31,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.Dd $Mdocdate: July 25 2011 $ +.Dd $Mdocdate: June 4 2013 $ .Dt WMEMCPY 3 .Os .Sh NAME @@ -50,6 +50,9 @@ wide characters from buffer .Fa src to buffer .Fa dst . +If the two buffers may overlap, +.Xr wmemmove 3 +must be used instead. .Sh RETURN VALUES The .Fn wmemcpy @@ -74,12 +77,3 @@ function was ported from .Nx and first appeared in .Ox 3.8 . -.Sh CAVEATS -In this implementation -.Fn wmemcpy -is implemented using -.Xr bcopy 3 , -and therefore the buffers may overlap. -On other systems, copying overlapping buffers may produce surprises. -A portable, safe solution is to use -.Xr wmemmove 3 . |