Index: uspace/lib/c/include/io/klog.h
===================================================================
--- uspace/lib/c/include/io/klog.h	(revision fd07e57b67ceab8f6bff8103a832fe90c48a7715)
+++ uspace/lib/c/include/io/klog.h	(revision fd07e57b67ceab8f6bff8103a832fe90c48a7715)
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2013 Martin Sucha
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup libc
+ * @{
+ */
+/** @file
+ */
+
+#ifndef LIBC_IO_KLOG_H_
+#define LIBC_IO_KLOG_H_
+
+#include <sys/types.h>
+#include <stdarg.h>
+#include <io/verify.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <str.h>
+#include <abi/log.h>
+
+extern size_t klog_write(log_level_t, const void *, size_t);
+extern int klog_read(void *, size_t);
+
+#define KLOG_PRINTF(lvl, fmt, ...) ({ \
+	char *_fmt = str_dup(fmt); \
+	size_t _fmtsize = str_size(_fmt); \
+	if (_fmtsize > 0 && _fmt[_fmtsize - 1] == '\n') \
+		_fmt[_fmtsize - 1] = 0; \
+	char *_s; \
+	int _c = asprintf(&_s, _fmt, ##__VA_ARGS__); \
+	free(_fmt); \
+	if (_c >= 0) { \
+		_c = klog_write((lvl), _s, str_size(_s)); \
+		free(_s); \
+	}; \
+	(_c >= 0); \
+})
+
+#endif
+
+/** @}
+ */
Index: uspace/lib/c/include/io/log.h
===================================================================
--- uspace/lib/c/include/io/log.h	(revision 6fa9a99d9fa209ffacbdbc40837bf0f435c98e1b)
+++ uspace/lib/c/include/io/log.h	(revision fd07e57b67ceab8f6bff8103a832fe90c48a7715)
@@ -39,22 +39,5 @@
 #include <io/verify.h>
 
-/** Log message level. */
-typedef enum {
-	/** Fatal error, program is not able to recover at all. */
-	LVL_FATAL,
-	/** Serious error but the program can recover from it. */
-	LVL_ERROR,
-	/** Easily recoverable problem. */
-	LVL_WARN,
-	/** Information message that ought to be printed by default. */
-	LVL_NOTE,
-	/** Debugging purpose message. */
-	LVL_DEBUG,
-	/** More detailed debugging message. */
-	LVL_DEBUG2,
-	
-	/** For checking range of values */
-	LVL_LIMIT
-} log_level_t;
+#include <abi/log.h>
 
 /** Log itself (logging target). */