Make built-in echo behave according to POSIX when set -o posix is in effect:

the only option is -n, and only one of those is parsed.

diff from Ingo Schwarze
ok otto@ kili@; manpage changes ok jmc@

1 files changed, 16 insertions, 2 deletions

diff --git a/bin/ksh/sh.1 b/bin/ksh/sh.1
index 95ab08d9d09..232cf13061e 100644
--- a/bin/ksh/sh.1
+++ b/bin/ksh/sh.1
@@ -1,8 +1,8 @@
-.\"	$OpenBSD: sh.1,v 1.77 2009/01/29 23:27:26 jaredy Exp $
+.\"	$OpenBSD: sh.1,v 1.78 2009/02/07 07:24:37 guenther Exp $
 .\"
 .\"	Public Domain
 .\"
-.Dd $Mdocdate: January 29 2009 $
+.Dd $Mdocdate: February 7 2009 $
 .Dt SH 1
 .Os
 .Sh NAME
@@ -1939,6 +1939,16 @@ In the future, a new option
 .Pq Fl v No perhaps
 will be added to distinguish the two behaviours.
 .It
+.Ic echo
+options.
+In POSIX mode,
+.Fl e
+and
+.Fl E
+will not be treated as options, but printed like other arguments;
+in non-POSIX mode, these options control the interpretation
+of backslash sequences.
+.It
 .Ic fg
 exit status.
 In POSIX mode, the exit status is 0 if no errors occur;
@@ -2326,6 +2336,10 @@ option suppresses the trailing newline,
 enables backslash interpretation (a no-op, since this is normally done), and
 .Fl E
 suppresses backslash interpretation.
+If the
+.Ic posix
+option is set, only the first argument is treated as an option, and only
+if it is exactly ``-n''.
 .Pp
 .It Ic eval Ar command ...
 The arguments are concatenated (with spaces between them) to form a single