[src/trunk]: src/lib/libedit PR/54279: Jonathan Perkins: Ignore adjacent star...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0914274e2ec9
branches:  trunk
changeset: 451845:0914274e2ec9
user:      christos <christos%NetBSD.org@localhost>
date:      Fri Jun 07 15:18:20 2019 +0000

description:
PR/54279: Jonathan Perkins: Ignore adjacent start/end prompt ignore.

diffstat:

 lib/libedit/readline.c |  14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)

diffs (35 lines):

diff -r ed119cbb3853 -r 0914274e2ec9 lib/libedit/readline.c
--- a/lib/libedit/readline.c    Fri Jun 07 13:49:23 2019 +0000
+++ b/lib/libedit/readline.c    Fri Jun 07 15:18:20 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: readline.c,v 1.152 2019/04/26 16:56:57 christos Exp $  */
+/*     $NetBSD: readline.c,v 1.153 2019/06/07 15:18:20 christos Exp $  */
 
 /*-
  * Copyright (c) 1997 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
 
 #include "config.h"
 #if !defined(lint) && !defined(SCCSID)
-__RCSID("$NetBSD: readline.c,v 1.152 2019/04/26 16:56:57 christos Exp $");
+__RCSID("$NetBSD: readline.c,v 1.153 2019/06/07 15:18:20 christos Exp $");
 #endif /* not lint && not SCCSID */
 
 #include <sys/types.h>
@@ -258,8 +258,14 @@
        if (rl_prompt == NULL)
                return -1;
 
-       while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL)
-               *p = RL_PROMPT_START_IGNORE;
+       while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) {
+               /* Remove adjacent end/start markers to avoid double-escapes. */
+               if (p[1] == RL_PROMPT_START_IGNORE) {
+                       memmove(p, p + 2, 1 + strlen(p + 2));
+               } else {
+                       *p = RL_PROMPT_START_IGNORE;
+               }
+       }
 
        return 0;
 }