diff --git a/include/metalsvm/stdio.h b/include/metalsvm/stdio.h
index ca276766..4a314b57 100644
--- a/include/metalsvm/stdio.h
+++ b/include/metalsvm/stdio.h
@@ -22,11 +22,17 @@
 
 #include <metalsvm/config.h>
 #include <metalsvm/stddef.h>
+#include <metalsvm/stdarg.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+/*
+ * Forces all write operations
+ */ 
+int kflush(void);
+
 /*
  * Works like the ANSI C function puts 
  */
@@ -38,20 +44,30 @@ int kputs(const char *);
 int kputchar(int);
 
 /*
- * Work like the ANSI C function printf
+ * Works like the ANSI C function printf
  */
 int kprintf(const char*, ...);
 
-/*
- * Forces all write operations
+/* 
+ * Works like the ANSI c function sprintf
  */
-int kflush(void);
+int ksprintf(char *str, const char *format, ...);
+
+/* 
+ * Works like the ANSI c function sprintf
+ */
+int ksnprintf(char *str, size_t size, const char *format, ...);
 
 /*
  * Initialize the I/O functions 
  */
 int koutput_init(void);
 
+/*
+ * Scaled down version of printf(3)
+ */
+int kvprintf(char const *fmt, void (*func) (int, void *), void *arg, int radix, va_list ap);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/libkern/Makefile b/libkern/Makefile
index 3d93ffcf..5bcc2212 100644
--- a/libkern/Makefile
+++ b/libkern/Makefile
@@ -1,4 +1,4 @@
-C_source = string.c stdio.c printf.c qdivrem.c udivdi3.c umoddi3.c
+C_source = string.c stdio.c printf.c sprintf.c qdivrem.c udivdi3.c umoddi3.c
 
 OBJS += $(patsubst %.c, %.o, $(filter %.c, $(C_source)))
 
diff --git a/libkern/printf.c b/libkern/printf.c
index 097e5c32..780184bb 100644
--- a/libkern/printf.c
+++ b/libkern/printf.c
@@ -44,7 +44,7 @@
  * all typedefs required have been added.
  */
 
-#include <eduos/string.h>
+#include <metalsvm/string.h>
 
 #define __64BIT__
 
diff --git a/libkern/sprintf.c b/libkern/sprintf.c
new file mode 100644
index 00000000..cb2581c9
--- /dev/null
+++ b/libkern/sprintf.c
@@ -0,0 +1,74 @@
+/* 
+ * Copyright 2010 Stefan Lankes, Chair for Operating Systems,
+ *                               RWTH Aachen University
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *  This file is part of MetalSVM.
+ */
+
+#include <metalsvm/stdio.h>
+
+typedef struct {
+	char *str;
+	size_t pos;
+	size_t max;
+} sputchar_arg_t;
+
+static void sputchar(int c, void *arg)
+{
+	sputchar_arg_t *dest = (sputchar_arg_t *) arg;
+
+	if (dest->pos < dest->max) {
+		dest->str[dest->pos] = (char)c;
+		dest->pos++;
+	}
+}
+
+int ksnprintf(char *str, size_t size, const char *format, ...)
+{
+	int ret;
+	va_list ap;
+	sputchar_arg_t dest;
+
+	dest.str = str;
+	dest.pos = 0;
+	dest.max = size;
+
+	va_start(ap, format);
+	ret = kvprintf(format, sputchar, &dest, 10, ap);
+	va_end(ap);
+
+	str[ret] = 0;
+
+	return ret;
+}
+
+int ksprintf(char *str, const char *format, ...)
+{
+	int ret;
+	va_list ap;
+	sputchar_arg_t dest;
+
+	dest.str = str;
+	dest.pos = 0;
+	dest.max = (size_t) -1;
+
+	va_start(ap, format);
+	ret = kvprintf(format, sputchar, &dest, 10, ap);
+	va_end(ap);
+
+	str[ret] = 0;
+
+	return ret;
+}