--- /dev/null
+/*
+ * ctype.h
+*/
+
+#ifndef _CTYPE_H_
+#define _CTYPE_H_
+
+#define _U 01
+#define _L 02
+#define _N 04
+#define _S 010
+#define _P 020
+#define _C 040
+#define _X 0100
+#define _B 0200
+
+
+int isalpha(int);
+int isupper(int);
+int islower(int);
+int isdigit(int);
+int isxdigit(int);
+int isspace(int);
+int ispunct(int);
+int isalnum(int);
+int isprint(int);
+int isgraph(int);
+int iscntrl(int);
+int toupper(int);
+int tolower(int);
+
+extern const char *__ctype_ptr;
+extern const char _ctype_[]; /* For backward compatibility. */
+
+#endif /* _CTYPE_H_ */
+