From 47d63d77f674884c913a4ae0015f67cdbbed48c6 Mon Sep 17 00:00:00 2001
From: l5y <220195275+l5yth@users.noreply.github.com>
Date: Tue, 2 Jun 2026 12:02:20 +0200
Subject: [PATCH 1/2] Fix Print::printf return value on truncation and error

---
 cores/portduino/PortduinoPrint.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/cores/portduino/PortduinoPrint.cpp b/cores/portduino/PortduinoPrint.cpp
index b6de06a..72d3157 100644
--- a/cores/portduino/PortduinoPrint.cpp
+++ b/cores/portduino/PortduinoPrint.cpp
@@ -10,8 +10,10 @@ size_t Print::printf(const char *format, ...) {
                                 // Linux that is fine, TBD on MyNewt
     va_list args;
     va_start(args, format);
-    size_t n = vsnprintf(buf, sizeof(buf), format, args);
-    write(buf);
+    int n = vsnprintf(buf, sizeof(buf), format, args);
     va_end(args);
-    return n;
+    if (n <= 0) return 0;
+    // vsnprintf returns the would-be length; clamp to what actually fit.
+    size_t len = (n < (int)sizeof(buf)) ? (size_t)n : sizeof(buf) - 1;
+    return write((const uint8_t *)buf, len);
 }
\ No newline at end of file

From 6d5b5166fe15df29c3101d08fc2388d8957fdff1 Mon Sep 17 00:00:00 2001
From: l5y <220195275+l5yth@users.noreply.github.com>
Date: Tue, 2 Jun 2026 12:15:56 +0200
Subject: [PATCH 2/2] Fix Print::printf return value on truncation and error

---
 cores/portduino/PortduinoPrint.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cores/portduino/PortduinoPrint.cpp b/cores/portduino/PortduinoPrint.cpp
index 72d3157..1f74388 100644
--- a/cores/portduino/PortduinoPrint.cpp
+++ b/cores/portduino/PortduinoPrint.cpp
@@ -16,4 +16,4 @@ size_t Print::printf(const char *format, ...) {
     // vsnprintf returns the would-be length; clamp to what actually fit.
     size_t len = (n < (int)sizeof(buf)) ? (size_t)n : sizeof(buf) - 1;
     return write((const uint8_t *)buf, len);
-}
\ No newline at end of file
+}