diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index 23f5233a5..dda337e08 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -339,12 +339,14 @@ The obsolescent function 'usleep' is called. POSIX.1-2001 declares usleep() func
       <not-uninit/>
     </arg>
   </function>
+  <!-- http://man7.org/linux/man-pages/man2/alarm.2.html -->
   <!-- unsigned int alarm(unsigned int seconds); -->
   <function name="alarm">
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- struct rpcent *getrpcent(void); -->
@@ -579,6 +581,7 @@ The obsolescent function 'usleep' is called. POSIX.1-2001 declares usleep() func
     </arg>
     <arg nr="2">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- wchar_t *wcsdup(const wchar_t *s); -->
@@ -628,6 +631,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="2">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- int mkdir(const char *pathname, mode_t mode); -->
@@ -918,6 +922,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="3">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- long int fpathconf(int fildes, int name); -->
@@ -1058,6 +1063,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="3">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- ssize_t write(int fildes, const void *buf, size_t nbyte); -->
@@ -1146,6 +1152,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="2">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
     <arg nr="3">
       <not-uninit/>
@@ -1170,6 +1177,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="2">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
     <arg nr="3">
       <not-uninit/>
@@ -1193,6 +1201,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="2">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- void openlog(const char *ident, int option, int facility); -->
@@ -1722,6 +1731,10 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <arg nr="1">
       <not-uninit/>
     </arg>
+    <arg nr="4">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
     <arg nr="5"/>
   </function>
   <!-- struct passwd *getpwuid(uid_t uid); -->
@@ -1741,6 +1754,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="4">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
     <arg nr="5"/>
   </function>
@@ -1821,6 +1835,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="4">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- int    regexec(const regex_t *, const char *, size_t, regmatch_t [restrict], int); -->
@@ -1836,6 +1851,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="3">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
     <arg nr="4">
       <not-uninit/>
@@ -2108,6 +2124,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="3">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- int readlinkat(int dirfd, const char *pathname, char *buf, size_t bufsiz); -->
@@ -2126,6 +2143,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="4">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- char *asctime_r(const struct tm *tm, char *buf); -->
@@ -2311,6 +2329,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="3">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
     <warn severity="style" reason="Obsolescent" alternatives="memcpy,memmove"/>
   </function>
@@ -2329,6 +2348,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="3">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
     <warn severity="style" reason="Obsolescent" alternatives="memcmp"/>
   </function>
@@ -2341,6 +2361,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="2">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
     <warn severity="style" reason="Obsolescent" alternatives="memset"/>
   </function>
@@ -2561,6 +2582,10 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <arg nr="2">
       <not-uninit/>
     </arg>
+    <arg nr="3">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
     <arg nr="4"/>
   </function>
   <!-- struct group *fgetgrent(FILE *stream); -->
@@ -2723,6 +2748,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="2">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
   </function>
   <!-- http://man7.org/linux/man-pages/man3/ffs.3.html -->
@@ -2757,6 +2783,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     </arg>
     <arg nr="2">
       <not-uninit/>
+      <valid>0:</valid>
     </arg>
     <arg nr="3">
       <not-uninit/>