Use somewhat harsher language and better examples; demonstrate that

non-dangerous use functions is difficult.
ok guenther

1 files changed, 13 insertions, 21 deletions

diff --git a/lib/libc/string/strcpy.3 b/lib/libc/string/strcpy.3
index 849184d1f54..7174f7c963c 100644
--- a/lib/libc/string/strcpy.3
+++ b/lib/libc/string/strcpy.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: strcpy.3,v 1.20 2013/12/19 20:52:37 millert Exp $
+.\"	$OpenBSD: strcpy.3,v 1.21 2014/04/19 11:30:40 deraadt Exp $
 .\"
 .\" Copyright (c) 1990, 1991 The Regents of the University of California.
 .\" All rights reserved.
@@ -31,12 +31,12 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: December 19 2013 $
+.Dd $Mdocdate: April 19 2014 $
 .Dt STRCPY 3
 .Os
 .Sh NAME
 .Nm strcpy
-.Nd copy a string
+.Nd copy a string without bounds checking
 .Sh SYNOPSIS
 .In string.h
 .Ft char *
@@ -46,43 +46,35 @@ The
 .Fn strcpy
 function copies the string
 .Fa src
-to
-.Fa dst
 (including the terminating
 .Ql \e0
-character).
-The string
+character) to the buffer
+.Fa dst .
+.Pp
+No bounds checking is performed.
+If the buffer
 .Fa dst
-must be at least as large as
-.Fa src
-to hold the result.
+is not large enough to hold the result,
+subsequent memory will be damaged.
 .Pp
 If the
 .Fa src
-and
+string is inside the
 .Fa dst
-strings overlap, the behavior is undefined.
+buffer, the behavior is undefined.
 .Sh RETURN VALUES
 The
 .Fn strcpy
 function returns
 .Fa dst .
 .Sh SEE ALSO
-.Xr bcopy 3 ,
-.Xr memccpy 3 ,
-.Xr memcpy 3 ,
-.Xr memmove 3 ,
-.Xr strcat 3 ,
 .Xr strlcpy 3 ,
-.Xr strncpy 3 ,
 .Xr wcscpy 3 ,
 .Xr wcslcpy 3
 .Sh STANDARDS
 The
 .Fn strcpy
-and
-.Fn strncpy
-functions conform to
+function conforms to
 .St -ansiC .
 .Sh HISTORY
 The