diff options
| -rw-r--r-- | lib/libc/stdio/printf.3 | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/lib/libc/stdio/printf.3 b/lib/libc/stdio/printf.3 index 4931d4e3b3d..1eaf7375db4 100644 --- a/lib/libc/stdio/printf.3 +++ b/lib/libc/stdio/printf.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: printf.3,v 1.45 2005/02/25 03:12:44 cloder Exp $ +.\" $OpenBSD: printf.3,v 1.46 2005/04/14 18:19:24 otto Exp $ .\" .\" Copyright (c) 1990, 1991, 1993 .\" The Regents of the University of California. All rights reserved. @@ -165,6 +165,14 @@ if the return value is greater than or equal to the .Fa size argument, the string was too short and some of the printed characters were discarded. +If +.Fa size +is zero, +.Fa str +may be a null pointer and no characters will be written; +the number of bytes that would have been written excluding the terminating +.Ql \e0 +byte, or \-1 on error, will be returned. .Pp .Fn sprintf and |