Support \ooo escapes, from Avi Halachmi.

2 files changed, 29 insertions, 3 deletions

diff --git a/cmd-parse.y b/cmd-parse.y
index f347280b..739ca56c 100644
--- a/cmd-parse.y
+++ b/cmd-parse.y
@@ -1083,12 +1083,34 @@ error:
 static int
 yylex_token_escape(char **buf, size_t *len)
 {
-	int			 ch, type;
+	int			 ch, type, o2, o3;
 	u_int			 size, i, tmp;
 	char			 s[9];
 	struct utf8_data	 ud;
 
-	switch (ch = yylex_getc()) {
+	ch = yylex_getc();
+
+	if (ch >= '4' && ch <= '7') {
+		yyerror("invalid octal escape");
+		return (0);
+	}
+	if (ch >= '0' && ch <= '3') {
+		o2 = yylex_getc();
+		if (o2 >= '0' && o2 <= '7') {
+			o3 = yylex_getc();
+			if (o3 >= '0' && o3 <= '7') {
+				ch = 64 * (ch - '0') +
+				      8 * (o2 - '0') +
+				          (o3 - '0');
+				yylex_append1(buf, len, ch);
+				return (1);
+			}
+		}
+		yyerror("invalid octal escape");
+		return (0);
+	}
+
+	switch (ch) {
 	case EOF:
 		return (0);
 	case 'e':
diff --git a/tmux.1 b/tmux.1
index b4e27c40..dfdd96b4 100644
--- a/tmux.1
+++ b/tmux.1
@@ -515,7 +515,11 @@ the given four or eight digit hexadecimal number.
 When preceded (escaped) by a \e, the following characters are replaced: \ee by
 the escape character; \er by a carriage return; \en by a newline; and \et by a
 tab.
-.Pp
+.It
+\eooo is replaced by a character of the octal value ooo.
+Three octal digits are required, for example \e001.
+The largest valid character is \e377.
+.It
 Any other characters preceded by \e are replaced by themselves (that is, the \e
 is removed) and are not treated as having any special meaning - so for example
 \e; will not mark a command sequence and \e$ will not expand an environment