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-rw-r--r--ChangeLog4
-rw-r--r--src/dash.15
-rw-r--r--src/options.c16
3 files changed, 21 insertions, 4 deletions
diff --git a/ChangeLog b/ChangeLog
index e72849c..10ec45c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2007-12-23  Richard M Kreuter <kreuter@progn.net>
+
+	* Add set +o support.
+
 2007-12-23  Steve Langasek <steve.langasek@canonical.com>
 
 	* Fixed bad pointer arithmetic in evalcommand.
diff --git a/src/dash.1 b/src/dash.1
index 9b8ab0e..b4140eb 100644
--- a/src/dash.1
+++ b/src/dash.1
@@ -1782,6 +1782,11 @@ With no arguments, it lists the values of all shell variables.
 If options are given, it sets the specified option
 flags, or clears them as described in the section called
 .Sx Argument List Processing .
+As a special case, if the option is -o or +o and no argument is
+supplied, the shell prints the settings of all its options.  If the
+option is -o, the settings are printed in a human-readable format; if
+the option is +o, the settings are printed in a format suitable for
+reinput to the shell to affect the same option settings.
 .Pp
 The third use of the set command is to set the values of the shell's
 positional parameters to the specified args.
diff --git a/src/options.c b/src/options.c
index f669117..48c9671 100644
--- a/src/options.c
+++ b/src/options.c
@@ -240,10 +240,18 @@ minus_o(char *name, int val)
 	int i;
 
 	if (name == NULL) {
-		out1str("Current option settings\n");
-		for (i = 0; i < NOPTS; i++)
-			out1fmt("%-16s%s\n", optnames[i],
-				optlist[i] ? "on" : "off");
+		if (val) {
+			out1str("Current option settings\n");
+			for (i = 0; i < NOPTS; i++)
+				out1fmt("%-16s%s\n", optnames[i],
+					optlist[i] ? "on" : "off");
+		} else {
+			for (i = 0; i < NOPTS; i++)
+				out1fmt("set %s %s\n",
+					optlist[i] ? "-o" : "+o",
+					optnames[i]);
+
+		}
 	} else {
 		for (i = 0; i < NOPTS; i++)
 			if (equal(name, optnames[i])) {