std.cfg: Moved strdup() from posix.cfg to std.cfg since its now part of C23.

cfg/posix.cfg

@@ -1187,17 +1187,6 @@ The obsolescent function 'usleep' is called. POSIX.1-2001 declares usleep() func
       <not-bool/>
     </arg>
   </function>
-  <!-- char *strdup(const char *s); -->
-  <function name="strdup">
-    <noreturn>false</noreturn>
-    <returnValue type="char *"/>
-    <use-retval/>
-    <arg nr="1">
-      <not-null/>
-      <not-uninit/>
-      <not-bool/>
-    </arg>
-  </function>
   <!-- char *strndup(const char *s, size_t n); -->
   <function name="strndup">
     <noreturn>false</noreturn>
@@ -5724,7 +5713,6 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <dealloc>free</dealloc>
   </memory>
   <memory>
-    <alloc init="true" buffer-size="strdup">strdup</alloc>
     <alloc init="true">strndup</alloc>
     <alloc init="true">wcsdup</alloc>
     <dealloc>free</dealloc>

cfg/std.cfg

@@ -7976,6 +7976,17 @@ initializer list (7) string& replace (const_iterator i1, const_iterator i2, init
       <not-bool/>
     </arg>
   </function>
+  <!-- char *strdup(const char *s); -->
+  <function name="strdup">
+    <noreturn>false</noreturn>
+    <returnValue type="char *"/>
+    <use-retval/>
+    <arg nr="1">
+      <not-null/>
+      <not-uninit/>
+      <not-bool/>
+    </arg>
+  </function>  
   <!-- int mtx_init( mtx_t* mutex, int type ); // since C11 -->
   <function name="mtx_init">
     <noreturn>false</noreturn>
@@ -8185,6 +8196,10 @@ initializer list (7) string& replace (const_iterator i1, const_iterator i2, init
     <realloc init="false" buffer-size="calloc:2,3">reallocarray</realloc>
     <dealloc>free</dealloc>
   </memory>
+  <memory>
+    <alloc init="true" buffer-size="strdup">strdup</alloc>
+    <dealloc>free</dealloc>
+  </memory>
   <resource>
     <alloc init="true">fopen</alloc>
     <alloc init="true">tmpfile</alloc>

test/cfg/std.c

@@ -2891,6 +2891,14 @@ void uninitvar_vprintf(char *Format, va_list Arg)
     (void)vprintf(Format,arg2);
 }
 
+void memleak_strdup (char *s) // #9328
+{
+    char *s1 = strdup(s);
+    printf("%s",s1);
+    free(s);     // s1 is not freed
+    // cppcheck-suppress memleak
+}
+
 void uninitvar_vwprintf(wchar_t *Format, va_list Arg)
 {
     wchar_t * format1, * format2;