Add: better dynamic command management

src/libc/string.h

@@ -1,7 +1,7 @@
 #ifndef INCLUDE_STRING_H
 #define INCLUDE_STRING_H
 
-int strlen(char* str);
-int strcmp(char* str1, char* str2);
+int strlen(const char* str);
+int strcmp(const char* str1, const char* str2);
 
 #endif