Index: uspace/lib/posix/Makefile
===================================================================
--- uspace/lib/posix/Makefile	(revision d3ce33fa059aa0515a8098069a1b5db2a251912f)
+++ uspace/lib/posix/Makefile	(revision d9eaa433f4aa93df8492c2b7fe4dd5bef5ece29d)
@@ -42,4 +42,5 @@
 	fcntl.c \
 	fnmatch.c \
+	locale.c \
 	math.c \
 	pwd.c \
Index: uspace/lib/posix/locale.c
===================================================================
--- uspace/lib/posix/locale.c	(revision d9eaa433f4aa93df8492c2b7fe4dd5bef5ece29d)
+++ uspace/lib/posix/locale.c	(revision d9eaa433f4aa93df8492c2b7fe4dd5bef5ece29d)
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2011 Jiri Zarevucky
+ * 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 libposix
+ * @{
+ */
+/** @file
+ */
+
+#define LIBPOSIX_INTERNAL
+
+#include "internal/common.h"
+#include "locale.h"
+
+#include "errno.h"
+#include "limits.h"
+#include "string.h"
+
+struct _posix_locale {
+	int _dummy;
+};
+
+const struct posix_lconv C_LOCALE = {
+	.currency_symbol = (char *) "",
+	.decimal_point = (char *) ".",
+	.frac_digits = CHAR_MAX,
+	.grouping = (char *) "",
+	.int_curr_symbol = (char *) "",
+	.int_frac_digits = CHAR_MAX,
+	.int_n_cs_precedes = CHAR_MAX,
+	.int_n_sep_by_space = CHAR_MAX,
+	.int_n_sign_posn = CHAR_MAX,
+	.int_p_cs_precedes = CHAR_MAX,
+	.int_p_sep_by_space = CHAR_MAX,
+	.int_p_sign_posn = CHAR_MAX,
+	.mon_decimal_point = (char *) "",
+	.mon_grouping = (char *) "",
+	.mon_thousands_sep = (char *) "",
+	.negative_sign = (char *) "",
+	.n_cs_precedes = CHAR_MAX,
+	.n_sep_by_space = CHAR_MAX,
+	.n_sign_posn = CHAR_MAX,
+	.positive_sign = (char *) "",
+	.p_cs_precedes = CHAR_MAX,
+	.p_sep_by_space = CHAR_MAX,
+	.p_sign_posn = CHAR_MAX,
+	.thousands_sep = (char *) ""
+};
+
+char *posix_setlocale(int category, const char *locale)
+{
+	// TODO
+	if (locale == NULL || *locale == '\0' ||
+	    posix_strcmp(locale, "C") == 0) {
+		return (char *) "C";
+	}
+	return NULL;
+}
+
+struct posix_lconv *localeconv(void)
+{
+	// TODO
+	return (struct posix_lconv *) &C_LOCALE;
+}
+
+posix_locale_t posix_duplocale(posix_locale_t locobj)
+{
+	if (locobj == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	posix_locale_t copy = malloc(sizeof(struct _posix_locale));
+	if (copy == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	memcpy(copy, locobj, sizeof(struct _posix_locale));
+	return copy;
+}
+
+void posix_freelocale(posix_locale_t locobj)
+{
+	free(locobj);
+}
+
+posix_locale_t posix_newlocale(int category_mask, const char *locale,
+    posix_locale_t base)
+{
+	if (locale == NULL ||
+	    (category_mask & LC_ALL_MASK) != category_mask) {
+		errno = EINVAL;
+		return NULL;
+	}
+	// TODO
+	posix_locale_t new = malloc(sizeof(struct _posix_locale));
+	if (new == NULL) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	if (base != NULL) {
+		posix_freelocale(base);
+	}
+	return new;
+}
+
+posix_locale_t posix_uselocale (posix_locale_t newloc)
+{
+	// TODO
+	return NULL;
+}
+
+/** @}
+ */
Index: uspace/lib/posix/locale.h
===================================================================
--- uspace/lib/posix/locale.h	(revision d9eaa433f4aa93df8492c2b7fe4dd5bef5ece29d)
+++ uspace/lib/posix/locale.h	(revision d9eaa433f4aa93df8492c2b7fe4dd5bef5ece29d)
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2011 Jiri Zarevucky
+ * 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 libposix
+ * @{
+ */
+/** @file
+ */
+
+#ifndef POSIX_LOCALE_H_
+#define POSIX_LOCALE_H_
+
+#ifndef NULL
+	#define NULL ((void *) 0)
+#endif
+
+#undef LC_ALL
+#undef LC_COLLATE
+#undef LC_CTYPE
+#undef LC_MESSAGES
+#undef LC_MONETARY
+#undef LC_NUMERIC
+#undef LC_TIME
+#define LC_ALL 0
+#define LC_COLLATE 1
+#define LC_CTYPE 2
+#define LC_MESSAGES 3
+#define LC_MONETARY 4
+#define LC_NUMERIC 5
+#define LC_TIME 6
+
+#undef LC_COLLATE_MASK
+#undef LC_CTYPE_MASK
+#undef LC_MESSAGES_MASK
+#undef LC_MONETARY_MASK
+#undef LC_NUMERIC_MASK
+#undef LC_TIME_MASK
+#undef LC_ALL_MASK
+#define LC_COLLATE_MASK (1 << 0)
+#define LC_CTYPE_MASK (1 << 1)
+#define LC_MESSAGES_MASK (1 << 2)
+#define LC_MONETARY_MASK (1 << 3)
+#define LC_NUMERIC_MASK (1 << 4)
+#define LC_TIME_MASK (1 << 5)
+#define LC_ALL_MASK (LC_COLLATE_MASK | LC_CTYPE_MASK | LC_MESSAGES_MASK | \
+    LC_MONETARY_MASK | LC_NUMERIC_MASK | LC_TIME_MASK)
+
+#undef LC_GLOBAL_LOCALE
+#define LC_GLOBAL_LOCALE NULL
+
+struct posix_lconv {
+	char    *currency_symbol;
+	char    *decimal_point;
+	char     frac_digits;
+	char    *grouping;
+	char    *int_curr_symbol;
+	char     int_frac_digits;
+	char     int_n_cs_precedes;
+	char     int_n_sep_by_space;
+	char     int_n_sign_posn;
+	char     int_p_cs_precedes;
+	char     int_p_sep_by_space;
+	char     int_p_sign_posn;
+	char    *mon_decimal_point;
+	char    *mon_grouping;
+	char    *mon_thousands_sep;
+	char    *negative_sign;
+	char     n_cs_precedes;
+	char     n_sep_by_space;
+	char     n_sign_posn;
+	char    *positive_sign;
+	char     p_cs_precedes;
+	char     p_sep_by_space;
+	char     p_sign_posn;
+	char    *thousands_sep;
+};
+
+typedef struct _posix_locale *posix_locale_t;
+
+extern char *posix_setlocale(int category, const char *locale);
+extern struct posix_lconv *localeconv(void);
+
+/* POSIX Extensions */
+extern posix_locale_t posix_duplocale(posix_locale_t locobj);
+extern void posix_freelocale(posix_locale_t locobj);
+extern posix_locale_t posix_newlocale(int category_mask, const char *locale,
+    posix_locale_t base);
+extern posix_locale_t posix_uselocale (posix_locale_t newloc);
+
+#ifndef LIBPOSIX_INTERNAL
+	#define lconv posix_lconv
+	#define locale_t posix_locale_t
+
+	#define setlocale posix_setlocale
+	#define localeconv posix_localeconv
+
+	#define newlocale posix_newlocale
+	#define uselocale posix_uselocale
+	#define duplocale posix_duplocale
+	#define freelocale posix_freelocale
+#endif
+
+
+#endif /* POSIX_LOCALE_H_ */
+
+/** @}
+ */