--- Libc/Libc-583/string/FreeBSD/strerror.3
+++ Libc/Libc-320/string/FreeBSD/strerror.3
@@ -34,9 +34,9 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     @(#)strerror.3	8.1 (Berkeley) 6/9/93
-.\" $FreeBSD: src/lib/libc/string/strerror.3,v 1.23 2004/10/12 14:52:52 keramida Exp $
+.\" $FreeBSD: src/lib/libc/string/strerror.3,v 1.22 2002/12/19 10:24:52 tjr Exp $
 .\"
-.Dd October 12, 2004
+.Dd December 19, 2002
 .Dt STRERROR 3
 .Os
 .Sh NAME
@@ -102,17 +102,18 @@
 .Pq Dq Li ":\ " ;
 otherwise, only the error message string is printed.
 .Pp
-If the error number is not recognized, these functions return an error message
-string containing
+If
+.Fa errnum
+is not a recognized error number,
+.Fn strerror
+returns an error message string containing
 .Dq Li "Unknown error:\ "
-followed by the error number in decimal.
-The
-.Fn strerror
-and
+followed by the error number in decimal, while
 .Fn strerror_r
-functions return
-.Er EINVAL
-as a warning.
+leaves
+.Fa strerrbuf
+unchanged and returns
+.Er EINVAL .
 Error numbers recognized by this implementation fall in
 the range 0 <
 .Fa errnum