From 58811808d51073c197df01dcfa6eedc2df001613 Mon Sep 17 00:00:00 2001
From: orbitcowboy <orbitcowboy@web.de>
Date: Fri, 9 Jul 2021 09:48:24 +0200
Subject: [PATCH] std.cfg: Improved configuration of 'strncpy', which is
 vulnerable for overlapping write issues.

---
 cfg/std.cfg      | 1 +
 test/cfg/std.cpp | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/cfg/std.cfg b/cfg/std.cfg
index 603386f36..c7b1b788f 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -4853,6 +4853,7 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
     <returnValue type="char *"/>
     <noreturn>false</noreturn>
     <leak-ignore/>
+    <not-overlapping-data ptr1-arg="1" ptr2-arg="2" size-arg="3"/>
     <arg nr="1" direction="out">
       <not-null/>
       <minsize type="argvalue" arg="3"/>
diff --git a/test/cfg/std.cpp b/test/cfg/std.cpp
index 0b4a49cb2..3109d6258 100644
--- a/test/cfg/std.cpp
+++ b/test/cfg/std.cpp
@@ -30,6 +30,12 @@
 #include <functional>
 #include <bitset>
 
+char * overlappingWriteFunction_strncpy(char *buf)
+{
+    // cppcheck-suppress overlappingWriteFunction
+    return strncpy(&buf[0], &buf[3], 2U);
+}
+
 std::bitset<10> std_bitset_test_ignoredReturnValue()
 {
     std::bitset<10> b1("1111010000");