Index: uspace/lib/posix/ctype.c
===================================================================
--- uspace/lib/posix/ctype.c	(revision 087c4c560f42f4e6db2ef2eb26c568e96cf54f6e)
+++ uspace/lib/posix/ctype.c	(revision df874db0879e8d304084e1985703dc568c94cb7f)
@@ -31,5 +31,5 @@
  * @{
  */
-/** @file
+/** @file Character classification.
  */
 
@@ -43,6 +43,6 @@
  * Checks whether character is a hexadecimal digit.
  *
- * @param c
- * @return
+ * @param c Character to inspect.
+ * @return Non-zero if character match the definition, zero otherwise.
  */
 int posix_isxdigit(int c)
@@ -56,6 +56,6 @@
  * Checks whether character is a word separator.
  *
- * @param c
- * @return
+ * @param c Character to inspect.
+ * @return Non-zero if character match the definition, zero otherwise.
  */
 int posix_isblank(int c)
@@ -67,6 +67,6 @@
  * Checks whether character is a control character.
  *
- * @param c
- * @return
+ * @param c Character to inspect.
+ * @return Non-zero if character match the definition, zero otherwise.
  */
 int posix_iscntrl(int c)
@@ -78,6 +78,6 @@
  * Checks whether character is any printing character except space.
  *
- * @param c
- * @return
+ * @param c Character to inspect.
+ * @return Non-zero if character match the definition, zero otherwise.
  */
 int posix_isgraph(int c)
@@ -89,6 +89,6 @@
  * Checks whether character is a printing character.
  *
- * @param c
- * @return
+ * @param c Character to inspect.
+ * @return Non-zero if character match the definition, zero otherwise.
  */
 int posix_isprint(int c)
@@ -100,6 +100,6 @@
  * Checks whether character is a punctuation.
  *
- * @param c
- * @return
+ * @param c Character to inspect.
+ * @return Non-zero if character match the definition, zero otherwise.
  */
 int posix_ispunct(int c)
@@ -111,6 +111,6 @@
  * Checks whether character is ASCII. (obsolete)
  *
- * @param c
- * @return
+ * @param c Character to inspect.
+ * @return Non-zero if character match the definition, zero otherwise.
  */
 extern int posix_isascii(int c)
@@ -122,6 +122,6 @@
  * Converts argument to a 7-bit ASCII character. (obsolete)
  *
- * @param c
- * @return
+ * @param c Character to convert.
+ * @return Coverted character.
  */
 extern int posix_toascii(int c)
Index: uspace/lib/posix/ctype.h
===================================================================
--- uspace/lib/posix/ctype.h	(revision 087c4c560f42f4e6db2ef2eb26c568e96cf54f6e)
+++ uspace/lib/posix/ctype.h	(revision df874db0879e8d304084e1985703dc568c94cb7f)
@@ -31,5 +31,5 @@
  * @{
  */
-/** @file
+/** @file Character classification.
  */