diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index cccd9e6bd..8bea99cea 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -1,5 +1,41 @@
 <?xml version="1.0"?>
 <def format="1">
+  <!-- struct group *getgrnam(const char *name); -->
+  <function name="getgrnam">
+    <use-retval/>
+    <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <leak-ignore/>
+  </function>
+  <!-- struct group *getgrgid(gid_t gid);-->
+  <function name="getgrgid">
+    <use-retval/>
+    <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <leak-ignore/>
+  </function>
+  <!-- int gettimeofday(struct timeval *tv, struct timezone *tz); -->
+  <function name="gettimeofday">
+    <noreturn>false</noreturn>
+    <arg nr="1"/>
+    <arg nr="2"/>
+    <leak-ignore/>
+  </function>
+  <!-- int settimeofday(const struct timeval *tv, const struct timezone *tz); -->
+  <function name="settimeofday">
+    <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <arg nr="2">
+      <not-uninit/>
+    </arg>
+    <leak-ignore/>
+  </function>
   <!-- void FD_CLR(int fd, fd_set *set); -->
   <function name="FD_CLR">
     <noreturn>false</noreturn>
@@ -1179,6 +1215,7 @@
   <podtype name="intptr_t"/>
   <podtype name="timespec"/>
   <podtype name="timeval"/>
+  <podtype name="timezone"/>
   <podtype name="sigaction"/>
   <!-- http://pubs.opengroup.org/onlinepubs/009695399/basedefs/arpa/inet.h.html -->
   <!-- uint32_t htonl(uint32_t); -->