From aa61062584e732a5cbf3a679f1c57556c42baf2d Mon Sep 17 00:00:00 2001
From: Guillaume Souchere <guillaume.souchere@espressif.com>
Date: Wed, 17 Apr 2024 10:17:52 +0200
Subject: [PATCH 1/2] fix(console): bug where backspace erases the prompt in
 dumb mode

---
 components/console/linenoise/linenoise.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/components/console/linenoise/linenoise.c b/components/console/linenoise/linenoise.c
index 94ab78cda58d..1f7b83cf4dcf 100644
--- a/components/console/linenoise/linenoise.c
+++ b/components/console/linenoise/linenoise.c
@@ -1136,10 +1136,16 @@ static int linenoiseDumb(char* buf, size_t buflen, const char* prompt) {
         } else if (c == BACKSPACE || c == 0x8) {
             if (count > 0) {
                 buf[count - 1] = 0;
-                count --;
+                count--;
+
+                /* Only erase symbol echoed from stdin. */
+                fputs("\x08 ", stdout); /* Windows CMD: erase symbol under cursor */
+                flushWrite();
+            } else {
+                /* Consume backspace if the command line is empty to avoid erasing the prompt */
+                continue;
             }
-            fputs("\x08 ", stdout); /* Windows CMD: erase symbol under cursor */
-            flushWrite();
+
         } else {
             buf[count] = c;
             ++count;

From ada38e8d5e4531737b8aba7bda31d19b78e4a173 Mon Sep 17 00:00:00 2001
From: Guillaume Souchere <guillaume.souchere@espressif.com>
Date: Wed, 17 Apr 2024 12:50:02 +0200
Subject: [PATCH 2/2] fix(linenoise): Skip 0x00 to 0x1F character in dump mode

Skipping through the non printable character assures that
in dumb mode, any special keys will not lead to the cursor
movement.
---
 components/console/linenoise/linenoise.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/components/console/linenoise/linenoise.c b/components/console/linenoise/linenoise.c
index 1f7b83cf4dcf..b4e8409af90a 100644
--- a/components/console/linenoise/linenoise.c
+++ b/components/console/linenoise/linenoise.c
@@ -178,6 +178,7 @@ enum KEY_ACTION{
 	CTRL_U = 21,        /* Ctrl+u */
 	CTRL_W = 23,        /* Ctrl+w */
 	ESC = 27,           /* Escape */
+	UNIT_SEP = 31,      /* ctrl-_ */
 	BACKSPACE =  127    /* Backspace */
 };
 
@@ -1131,9 +1132,7 @@ static int linenoiseDumb(char* buf, size_t buflen, const char* prompt) {
         int c = fgetc(stdin);
         if (c == '\n') {
             break;
-        } else if (c >= 0x1c && c <= 0x1f){
-            continue; /* consume arrow keys */
-        } else if (c == BACKSPACE || c == 0x8) {
+        } else if (c == BACKSPACE || c == CTRL_H) {
             if (count > 0) {
                 buf[count - 1] = 0;
                 count--;
@@ -1146,6 +1145,10 @@ static int linenoiseDumb(char* buf, size_t buflen, const char* prompt) {
                 continue;
             }
 
+        } else if (c <= UNIT_SEP) {
+            /* Consume all character that are non printable (the backspace
+             * case is handled above) */
+            continue;
         } else {
             buf[count] = c;
             ++count;