extern int cmd_enable_channels(int argc, const char **argv);
extern int cmd_disable_channels(int argc, const char **argv);
extern int cmd_add_context(int argc, const char **argv);
extern int cmd_enable_channels(int argc, const char **argv);
extern int cmd_disable_channels(int argc, const char **argv);
extern int cmd_add_context(int argc, const char **argv);