From 833ea2ccf347edf55c4c80bc0645a4cb4e1025c4 Mon Sep 17 00:00:00 2001
From: dukess <github@dukess.ru>
Date: Mon, 8 May 2023 09:59:26 +0300
Subject: [PATCH] Fix: overwrite buffer in cleanupDatalog()

---
 BSB_LAN/BSB_LAN.ino | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/BSB_LAN/BSB_LAN.ino b/BSB_LAN/BSB_LAN.ino
index d5f45084..83029439 100644
--- a/BSB_LAN/BSB_LAN.ino
+++ b/BSB_LAN/BSB_LAN.ino
@@ -6551,7 +6551,11 @@ next_parameter:
             } else if (p[2]=='K') { //--- clean up datalog, keeping only the most recent n days
               int nDays;
               if (sscanf(p+3,"%d",&nDays)==1 && nDays>0) {
-                printFmtToWebClient("\r\n%s\r\n",cleanupDatalog(nDays));
+                // We should flush all characters to client and use errormsgptr
+                // beacuse cleanupDatalog() and printFmtToWebClient() use same buffer;
+                flushToWebClient();
+                const char *errormsgptr = cleanupDatalog(nDays);
+                printFmtToWebClient("\r\n%s\r\n", errormsgptr);
                 // cleanup after failed cleanupDatalog(), if necessary:
                 SD.remove(datalogTemporaryFileName);
                 SD.remove(datalogIndexTemporaryFileName);