diff -Naurp ruli-0.36/sample/getaddrinfo.c ruli-0.36.oden/sample/getaddrinfo.c
--- ruli-0.36/sample/getaddrinfo.c	2005-08-31 12:43:17.000000000 +0200
+++ ruli-0.36.oden/sample/getaddrinfo.c	2009-10-05 16:06:43.000000000 +0200
@@ -174,7 +174,7 @@ static void solve(const char *fullname)
 
       for (ai = ai_res; ai; ai = ai->ai_next) {
 
-	printf(fullname);
+	printf("%s", fullname);
 
 	switch (ai->ai_family) {
 	case PF_INET:
diff -Naurp ruli-0.36/sample/ruli-getaddrinfo.c ruli-0.36.oden/sample/ruli-getaddrinfo.c
--- ruli-0.36/sample/ruli-getaddrinfo.c	2005-08-30 15:40:28.000000000 +0200
+++ ruli-0.36.oden/sample/ruli-getaddrinfo.c	2009-10-05 16:06:43.000000000 +0200
@@ -176,7 +176,7 @@ static void solve(const char *fullname)
 
       for (ai = ai_res; ai; ai = ai->ai_next) {
 
-	printf(fullname);
+	printf("%s", fullname);
 
 	switch (ai->ai_family) {
 	case PF_INET:
diff -Naurp ruli-0.36/tools/addrsolver2.c ruli-0.36.oden/tools/addrsolver2.c
--- ruli-0.36/tools/addrsolver2.c	2005-06-08 00:17:51.000000000 +0200
+++ ruli-0.36.oden/tools/addrsolver2.c	2009-10-05 16:06:43.000000000 +0200
@@ -75,7 +75,7 @@ static void *on_answer(ruli_res_query_t 
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
     
     return clean_query(qry, domain);
   }
@@ -86,7 +86,7 @@ static void *on_answer(ruli_res_query_t 
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
 
     return clean_query(qry, domain);
   }
@@ -115,7 +115,7 @@ static void *on_answer(ruli_res_query_t 
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
   }
 #endif
   
@@ -136,7 +136,7 @@ static void *on_answer(ruli_res_query_t 
       
       assert(str_len < BUFSZ);
       
-      printf(buf);
+      printf("%s", buf);
 
       ruli_parse_delete(&parse);
       return clean_query(qry, domain);
@@ -213,7 +213,7 @@ static void *on_answer(ruli_res_query_t 
     if (!addr_count) {
       str_len = snprintf(buf, BUFSZ, "%s answer-missing-address\n", domain);
       assert(str_len < BUFSZ);
-      printf(buf);
+      printf("%s", buf);
     }
   }
 
diff -Naurp ruli-0.36/tools/addrsolver3.c ruli-0.36.oden/tools/addrsolver3.c
--- ruli-0.36/tools/addrsolver3.c	2005-06-08 00:17:51.000000000 +0200
+++ ruli-0.36.oden/tools/addrsolver3.c	2009-10-05 16:06:43.000000000 +0200
@@ -75,7 +75,7 @@ static void *on_answer(ruli_res_query_t 
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
     
     return clean_query(qry, domain);
   }
@@ -86,7 +86,7 @@ static void *on_answer(ruli_res_query_t 
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
 
     return clean_query(qry, domain);
   }
@@ -115,7 +115,7 @@ static void *on_answer(ruli_res_query_t 
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
   }
 #endif
   
@@ -136,7 +136,7 @@ static void *on_answer(ruli_res_query_t 
       
       assert(str_len < BUFSZ);
       
-      printf(buf);
+      printf("%s", buf);
 
       ruli_parse_delete(&parse);
       return clean_query(qry, domain);
@@ -213,7 +213,7 @@ static void *on_answer(ruli_res_query_t 
     if (!addr_count) {
       str_len = snprintf(buf, BUFSZ, "%s answer-missing-address\n", domain);
       assert(str_len < BUFSZ);
-      printf(buf);
+      printf("%s", buf);
     }
   }
 
diff -Naurp ruli-0.36/tools/addrsolver.c ruli-0.36.oden/tools/addrsolver.c
--- ruli-0.36/tools/addrsolver.c	2005-06-08 00:17:51.000000000 +0200
+++ ruli-0.36.oden/tools/addrsolver.c	2009-10-05 16:06:43.000000000 +0200
@@ -75,7 +75,7 @@ static void *on_answer(ruli_res_query_t 
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
     
     return clean_query(qry, domain);
   }
@@ -86,7 +86,7 @@ static void *on_answer(ruli_res_query_t 
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
 
     return clean_query(qry, domain);
   }
@@ -115,7 +115,7 @@ static void *on_answer(ruli_res_query_t 
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
   }
 #endif
   
@@ -136,7 +136,7 @@ static void *on_answer(ruli_res_query_t 
       
       assert(str_len < BUFSZ);
       
-      printf(buf);
+      printf("%s", buf);
 
       ruli_parse_delete(&parse);
       return clean_query(qry, domain);
@@ -213,7 +213,7 @@ static void *on_answer(ruli_res_query_t 
     if (!addr_count) {
       str_len = snprintf(buf, BUFSZ, "%s answer-missing-address\n", domain);
       assert(str_len < BUFSZ);
-      printf(buf);
+      printf("%s", buf);
     }
   }
 
diff -Naurp ruli-0.36/tools/ipv6.c ruli-0.36.oden/tools/ipv6.c
--- ruli-0.36/tools/ipv6.c	2004-06-17 01:05:58.000000000 +0200
+++ ruli-0.36.oden/tools/ipv6.c	2009-10-05 16:06:43.000000000 +0200
@@ -43,7 +43,7 @@ static void perform(int expected_good, c
     int r = ruli_inet6_snprintf(buf, 40, "%04X", &in);
     assert(r > 0);
     assert(r < 40);
-    printf(buf);
+    printf("%s", buf);
   }
    
   if (!good == !expected_good) 
diff -Naurp ruli-0.36/tools/ruli-host.c ruli-0.36.oden/tools/ruli-host.c
--- ruli-0.36/tools/ruli-host.c	2004-11-10 16:29:39.000000000 +0100
+++ ruli-0.36.oden/tools/ruli-host.c	2009-10-05 16:06:43.000000000 +0200
@@ -70,7 +70,7 @@ static void *on_answer(ruli_host_t *qry,
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
     
     return clean_query(qry, domain);
   }
@@ -85,7 +85,7 @@ static void *on_answer(ruli_host_t *qry,
     str_len = snprintf(buf, BUFSZ, "%s query-failure: %d\n", 
 		       domain, answer_code);
     assert(str_len < BUFSZ);
-    printf(buf);
+    printf("%s", buf);
 
     return clean_query(qry, domain);
   }
@@ -109,7 +109,7 @@ static void *on_answer(ruli_host_t *qry,
 
     assert(str_len < BUFSZ);
 
-    printf(buf);
+    printf("%s", buf);
   }
 #endif