diff options
| -rw-r--r-- | bin/expr/expr.1 | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/bin/expr/expr.1 b/bin/expr/expr.1 index 92cad9793c8..a2f552f8eb6 100644 --- a/bin/expr/expr.1 +++ b/bin/expr/expr.1 @@ -1,10 +1,10 @@ -.\" $OpenBSD: expr.1,v 1.21 2010/09/03 10:00:40 jmc Exp $ +.\" $OpenBSD: expr.1,v 1.22 2014/02/23 18:13:27 schwarze Exp $ .\" $NetBSD: expr.1,v 1.9 1995/04/28 23:27:13 jtc Exp $ .\" .\" Written by J.T. Conklin <jtc@netbsd.org>. .\" Public domain. .\" -.Dd $Mdocdate: September 3 2010 $ +.Dd $Mdocdate: February 23 2014 $ .Dt EXPR 1 .Os .Sh NAME @@ -136,3 +136,21 @@ The utility is compliant with the .St -p1003.1-2008 specification. +.Sh HISTORY +The +.Nm +utility first appeared in the Programmer's Workbench (PWB/UNIX) +and has supported regular expressions since +.At v7 . +It was rewritten from scratch for +.Bx 386 0.1 +and again for +.Nx 1.1 . +.Sh AUTHORS +.An -nosplit +The first free version was written by +.An Pace Willisson +in 1992. +This version was written by +.An John T. Conklin +in 1994. |