From OpenBSD:

2009-02-07 15:03  kili

        * c_ksh.c (1.33):
          Ensure that *wp isn't NULL.

          ok otto@

2009-02-07 08:24  guenther

        * c_ksh.c (1.32), ksh.1 (1.124), sh.1 (1.78): 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@


Index: pdksh-5.2.14/c_ksh.c
===================================================================
--- pdksh-5.2.14.orig/c_ksh.c	2009-09-19 11:22:34.000000000 +0200
+++ pdksh-5.2.14/c_ksh.c	2009-09-19 12:13:54.000000000 +0200
@@ -247,23 +247,30 @@
 		 * by default.
 		 */
 		wp += 1;
-		while ((s = *wp) && *s == '-' && s[1]) {
-			while (*++s)
-				if (*s == 'n')
-					nflags &= ~PO_NL;
-				else if (*s == 'e')
-					nflags |= PO_EXPAND;
-				else if (*s == 'E')
-					nflags &= ~PO_EXPAND;
-				else
-					/* bad option: don't use nflags, print
-					 * argument
-					 */
+		if (Flag(FPOSIX)) {
+			if (*wp && strcmp(*wp, "-n") == 0) {
+				flags &= ~PO_NL;
+				wp++;
+			}
+		} else {
+			while ((s = *wp) && *s == '-' && s[1]) {
+				while (*++s)
+					if (*s == 'n')
+						nflags &= ~PO_NL;
+					else if (*s == 'e')
+						nflags |= PO_EXPAND;
+					else if (*s == 'E')
+						nflags &= ~PO_EXPAND;
+					else
+						/* bad option: don't use
+						 * nflags, print argument
+						 */
+						break;
+				if (*s)
 					break;
-			if (*s)
-				break;
-			wp++;
-			flags = nflags;
+				wp++;
+				flags = nflags;
+			}
 		}
 	} else {
 		int optc;
Index: pdksh-5.2.14/ksh.Man
===================================================================
--- pdksh-5.2.14.orig/ksh.Man	2009-09-19 11:22:34.000000000 +0200
+++ pdksh-5.2.14/ksh.Man	2009-09-19 12:13:54.000000000 +0200
@@ -1521,6 +1521,13 @@
 In future, a new option (\fB\-v\fP perhaps) will be added to distinguish
 the two behaviours.
 .IP \ \ \(bu
+\fBecho\fP
+options.
+In POSIX mode, \fB\-e\fP and \fB\-E\fP
+are not treated as options, but printed like other arguments;
+in non-POSIX mode, these options control the interpretation
+of backslash sequences.
+.IP \ \ \(bu
 \fBfg\fP exit status: in posix mode, the exit status is 0 if no errors occur;
 in non-posix mode, the exit status is that of the last foregrounded job.
 .IP \ \ \(bu
@@ -1780,6 +1787,9 @@
 \fB\-n\fP suppresses the trailing newline, \fB\-e\fP enables backslash
 interpretation (a no-op, since this is normally done), and \fB\-E\fP which
 suppresses backslash interpretation.
+If the \fIposix\fP
+option is set, only the first argument is treated as an option, and only
+if it is exactly \fB-n\fP.
 .\"}}}
 .\"{{{  eval command ...
 .IP "\fBeval\fP \fIcommand ...\fP"
Index: pdksh-5.2.14/tests/debian-115.t
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ pdksh-5.2.14/tests/debian-115.t	2009-09-19 12:18:11.000000000 +0200
@@ -0,0 +1,38 @@
+name: debian-115-1
+description:
+	Check if echo does not accept -e in posix mode
+stdin:
+	set -o posix
+	echo -e test
+expected-stdout:
+	-e test
+---
+name: debian-115-2
+description:
+	Check if echo accepts -e in non-posix mode
+stdin:
+	set +o posix
+	echo -e test
+expected-stdout:
+	test
+---
+name: debian-115-3
+description:
+	Check if echo accepts -n in posix mode
+stdin:
+	set -o posix
+	echo -n test
+	echo " OK"
+expected-stdout:
+	test OK
+---
+name: debian-115-4
+description:
+	Check if echo accepts -n in non-posix mode
+stdin:
+	set +o posix
+	echo -n test
+	echo " OK"
+expected-stdout:
+	test OK
+---