diff options
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/string/strlcpy.3 | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/lib/libc/string/strlcpy.3 b/lib/libc/string/strlcpy.3 index c1e8a0d510b..3d50e0b0f68 100644 --- a/lib/libc/string/strlcpy.3 +++ b/lib/libc/string/strlcpy.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: strlcpy.3,v 1.11 2000/11/16 23:27:41 angelos Exp $ +.\" $OpenBSD: strlcpy.3,v 1.12 2001/05/07 15:51:54 millert Exp $ .\" .\" Copyright (c) 1998, 2000 Todd C. Miller <Todd.Miller@courtesan.com> .\" All rights reserved. @@ -118,6 +118,25 @@ the length of .Fa src . While this may seem somewhat confusing it was done to make truncation detection simple. +.Pp +Note however, that if +.Fn strlcat +traverses +.Fa size +characters without finding a NUL, the length of the string is considered +to be +.Fa size . +This keeps +.Fn strlcat +from running off the end of a string. +In practice this should not happen (as it means that either +.Fa size +is incorrect or that +.Fa dst +is not a proper +.Dq C +string). +The check exists to prevent potential security problems in incorrect code. .Sh EXAMPLES The following code fragment illustrates the simple case: .Bd -literal -offset indent |