posix.cfg: Improved configuration of getpwnam_r().

cfg/posix.cfg

@@ -3366,9 +3366,13 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <noreturn>false</noreturn>
     <arg nr="1" direction="in">
       <not-uninit/>
+      <not-null/>
+    </arg>
+    <arg nr="2" direction="out">
+      <not-null/>
     </arg>
-    <arg nr="2" direction="out"/>
     <arg nr="3" direction="out">
+      <not-null/>
       <minsize type="argvalue" arg="4"/>
     </arg>
     <arg nr="4" direction="in">
@@ -3378,6 +3382,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="5" direction="out">
       <not-bool/>
+      <not-null/>
     </arg>
   </function>
   <!-- struct passwd *getpwuid(uid_t uid); -->

test/cfg/posix.c

@@ -35,6 +35,19 @@
 #include <string.h>
 #include <strings.h>
 
+int nullPointer_getpwnam_r(const char *name, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result)
+{
+    // cppcheck-suppress nullPointer
+    (void) getpwnam_r(NULL, pwd, buffer, bufsize, result);
+    // cppcheck-suppress nullPointer
+    (void) getpwnam_r(name, NULL, buffer, bufsize, result);
+    // cppcheck-suppress nullPointer
+    (void) getpwnam_r(name, pwd, NULL, bufsize, result);
+    // cppcheck-suppress nullPointer
+    (void) getpwnam_r(name, pwd, buffer, bufsize, NULL);
+    return getpwnam_r(name, pwd, buffer, bufsize, result);
+}
+
 int nullPointer_fgetpwent_r(FILE *restrict stream, struct passwd *restrict pwbuf, char *restrict buf, size_t buflen, struct passwd **restrict pwbufp)
 {
     // cppcheck-suppress nullPointer