+/**
+ * The type signature for command handling functions. They are
+ * usually registered as part of command_registration, providing
+ * a high-level means for executing a command.
+ *
+ * If the command fails, it *MUST* return a value != ERROR_OK
+ * (many commands break this rule, patches welcome!)
+ *
+ * This is *especially* important for commands such as writing
+ * to flash or verifying memory. The reason is that those commands
+ * can be used by programs to determine if the operation succeded
+ * or not. If the operation failed, then a program can try
+ * an alternative approach.
+ *
+ * Returning ERROR_COMMAND_SYNTAX_ERROR will have the effect of
+ * printing out the syntax of the command.
+ */