From dfd4227e7a3ec33dc7dbf77254928c36cca7db89 Mon Sep 17 00:00:00 2001
From: MadnessASAP <michael@a5ap.net>
Date: Thu, 12 Mar 2020 14:57:27 -0700
Subject: [PATCH] Don't return NULL on 0 length input

A 0 length string is still a valid input and should be treated as such, a NULL return should be reserved for when errors occur during line editing or EOF is reached.

Merges https://github.com/espressif/esp-idf/pull/4926
---
 components/console/linenoise/linenoise.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/components/console/linenoise/linenoise.c b/components/console/linenoise/linenoise.c
index f78e238af5..3b2e1c18e7 100644
--- a/components/console/linenoise/linenoise.c
+++ b/components/console/linenoise/linenoise.c
@@ -979,11 +979,11 @@ char *linenoise(const char *prompt) {
     } else {
         count = linenoiseDumb(buf, LINENOISE_MAX_LINE, prompt);
     }
-    if (count > 0) {
+    if (count >= 0) {
         sanitize(buf);
         count = strlen(buf);
     }
-    if (count <= 0) {
+    if (count < 0) {
         free(buf);
         return NULL;
     }