These environment variables are used to set up the connection and objects for standard services, like access to the filesystem.

PLASH_COMM_FD contains the number of a file descriptor for a connection to a server.

PLASH_CAPS says how many objects are exported by the server over the connection, and what they are. It is a semicolon-separated list of names for services. The index of a service name in the list is the object ID for the service.

For example, "fs_op;conn_maker;;;something_else" says that conn_maker has object ID 1 and something_else has object ID 4.

Standard services are: