IOC Shell Functions

iocsh.

iocsh. <item> [(arguments…)]

Performs an environment check for the given item. First, the user’s environment is checked to see if there are any environment variables that match up with the item’s name. If there aren’t, the search then drops back to trying to find a matching ioc shell function. Only functions that are registered in the iocsh function database will be found. If there are no matching elements in either of these two locations, a nil will be returned.

When using the lua shell interpreter, this functionality is embedded into the global environment. Any attempt to reference a name that hasn’t been set as a lua variable will attempt a search to see if the name references an environment variable or iocsh function. These are, however, read-only accesses. If you attempt to set a given item name to a value, all you will do is create a new lua variable with the given value.