Index: uspace/srv/fs/fat/fat_dentry.c
===================================================================
--- uspace/srv/fs/fat/fat_dentry.c	(revision 6ebaff9b7955b22a728943a79af1637b01d61586)
+++ uspace/srv/fs/fat/fat_dentry.c	(revision 0f57d0ea02e6cdbe99794e82287279b59c734cb5)
@@ -36,4 +36,63 @@
  */
 
+#include "fat_dentry.h"
+
+#define FAT_PAD			' ' 
+
+#define FAT_DENTRY_UNUSED	0x00
+#define FAT_DENTRY_E5_ESC	0x05
+#define FAT_DENTRY_DOT		0x2e
+#define FAT_DENTRY_ERASED	0xe5
+
+void dentry_name_canonify(fat_dentry_t *d, char *buf)
+{
+	int i;
+
+	for (i = 0; i < FAT_NAME_LEN; i++) {
+		if (d->name[i] == FAT_PAD)
+			break;
+		if (d->name[i] == FAT_DENTRY_E5_ESC)
+			*buf++ = 0xe5;
+		else
+			*buf++ = d->name[i];
+	}
+	if (d->ext[0] != FAT_PAD)
+		*buf++ = '.';
+	for (i = 0; i < FAT_EXT_LEN; i++) {
+		if (d->ext[i] == FAT_PAD) {
+			*buf = '\0';
+			return;
+		}
+		if (d->ext[i] == FAT_DENTRY_E5_ESC)
+			*buf++ = 0xe5;
+		else
+			*buf++ = d->ext[i];
+	}
+	*buf = '\0';
+}
+
+fat_dentry_clsf_t fat_classify_dentry(fat_dentry_t *d)
+{
+	if (d->attr & FAT_ATTR_VOLLABEL) {
+		/* volume label entry */
+		return FAT_DENTRY_SKIP;
+	}
+	if (d->name[0] == FAT_DENTRY_ERASED) {
+		/* not-currently-used entry */
+		return FAT_DENTRY_SKIP;
+	}
+	if (d->name[0] == FAT_DENTRY_UNUSED) {
+		/* never used entry */
+		return FAT_DENTRY_LAST;
+	}
+	if (d->name[0] == FAT_DENTRY_DOT) {
+		/*
+		 * Most likely '.' or '..'.
+		 * It cannot occur in a regular file name.
+		 */
+		return FAT_DENTRY_SKIP;
+	}
+	return FAT_DENTRY_VALID;
+}
 
 /**