document exit values; from daniel dickman

diff --git a/usr.bin/write/write.1 b/usr.bin/write/write.1
index 15a26a0..2c4df66 100644 (file)
--- a/usr.bin/write/write.1
+++ b/usr.bin/write/write.1
@@ -1,4 +1,4 @@
-.\"    $OpenBSD: write.1,v 1.13 2009/02/08 17:33:02 jmc Exp $
+.\"    $OpenBSD: write.1,v 1.14 2010/07/21 19:53:45 jmc Exp $
 .\"
 .\" Copyright (c) 1989, 1993
 .\"    The Regents of the University of California.  All rights reserved.
@@ -32,7 +32,7 @@
 .\"
 .\"     from: @(#)write.1      8.1 (Berkeley) 6/6/93
 .\"
-.Dd $Mdocdate: February 8 2009 $
+.Dd $Mdocdate: July 21 2010 $
 .Dt WRITE 1
 .Os
 .Sh NAME
@@ -94,6 +94,17 @@ The string
 .Dq oo
 means that the person believes the conversation to be
 over.
+.Pp
+The
+.Nm
+utility exits with one of the following values:
+.Pp
+.Bl -tag -width Ds -compact -offset indent
+.It 0
+Normal behavior.
+.It \*(Gt0
+The specified user is either not logged in or not accepting messages.
+.El
 .Sh SEE ALSO
 .Xr mesg 1 ,
 .Xr talk 1 ,