VM/CMS Glossary

A mapping of VM/CMS terminology to Rust concepts in this workspace.

VM & Supervisor

VM/CMS Term	Rust Concept	Description
CP (Control Program)	`Supervisor`	The hypervisor that manages virtual machines
Virtual Machine	`MachineId` + `MachineHandler`	An isolated execution context with its own handler
IPL (Initial Program Load)	`supervisor.ipl()`	Boot a virtual machine
LOGOFF	`supervisor.logoff()`	Shut down a virtual machine

Messaging & Communication

VM/CMS Term	Rust Concept	Description
CP SMSG	`supervisor.smsg()` / `ctx.try_send_smsg()`	Fire-and-forget text message (max 236 bytes)
IUCV (Inter-User Communication Vehicle)	Path API (`connect`, `sever`, `iucv_send`)	Bidirectional data channel between machines
IUCV CONNECT	`supervisor.connect()`	Request a path to another machine
IUCV ACCEPT	`on_connection_pending` returning `true`	Accept an incoming connection request
IUCV SEVER	`supervisor.sever()` / `ctx.sever_path()`	Tear down an established path
IUCV SEND	`ctx.iucv_send()`	Send binary data on a path
IUCV RECEIVE	`on_iucv_data()` callback	Receive binary data on a path
Path	`PathId`	Identifier for an IUCV connection

CMS File System

VM/CMS Term	Rust Concept	Description
fn ft fm	`FileSpec`	CMS file naming: filename, filetype, filemode (e.g., `PROFILE EXEC A`)
Minidisk	`AccessMode` + disk path	Virtual disk accessed at a filemode letter (A-Z)
Access	`CmsFileSystem::access_disk()`	Mount a disk directory at a filemode letter
LISTFILE	`cmd_listfile()`	List files matching a pattern
COPYFILE	`cmd_copyfile()`	Copy files between disks

Command Processor

VM/CMS Term	Rust Concept	Description
CMS command	`CommandProcessor::execute()`	Dispatch a command through the processor
Abbreviation	`parse_cms_command()`	IBM-style minimum abbreviation matching (e.g., `GLO` for `GLOBALV`)
EXEC	`ExecHandler::execute_exec()`	Run a REXX or EXEC2 program
GLOBALV	`GlobalVars`	Persistent named variables (SET/GET/LIST, LASTING/SESSION groups)
ExtCommandHandler	`ExtCommandHandler` trait	Extension point for spool/pipeline commands

Spool Subsystem

VM/CMS Term	Rust Concept	Description
Spool	`SpoolManager`	Virtual I/O queue manager for reader/punch/printer
Reader (RDR)	Reader queue	Inbound spool device for receiving files
Punch (PUN)	Punch queue	Outbound spool device for sending files
Printer (PRT)	Printer queue	Output spool device
Spool class	`SpoolClass`	Single-letter classification (A-Z, 0-9, *)
Spool ID	`SpoolId`	Numeric identifier for a spooled file
SENDFILE	`execute_spool_command(SendFile)`	Send a file to another user’s reader
RECEIVE	`execute_spool_command(Receive)`	Receive a file from the reader queue

Pipelines

VM/CMS Term	Rust Concept	Description
PIPE	`run_pipe()`	Execute a Hartmann pipeline
Stage	`Stage` trait	A processing unit in a pipeline
literal	Built-in stage	Emits a literal string
console	Built-in stage	Writes records to output (like terminal display)
locate	Built-in stage	Passes records matching a pattern
nlocate	Built-in stage	Passes records NOT matching a pattern

XEDIT Editor

VM/CMS Term	Rust Concept	Description
XEDIT	`xedit-core`	Full-screen editor
Prefix area	Prefix command model	Left margin for line commands (d, dd, i, a, c, m, etc.)
Current line	`Editor::current_line()`	The line the cursor is positioned on
Target	Target system	Navigation spec (`:n`, `/string/`, `*`, compound)
EXTRACT	REXX extract variables	Query editor state from macros
PROFILE XEDIT	Profile exec	Startup macro executed when editor opens
Command line	`====>` prompt	Where editor commands are entered

General

VM/CMS Term	Rust Concept	Description
EBCDIC	ASCII (simplified)	Character encoding for messages
DMSIUC	`IucvError` display prefix	IBM message prefix for IUCV errors
RC (Return Code)	`rc()` methods	Numeric error code (CMS convention: 0=ok, 24=error, 28=not found)
Signal	Internal `MachineSignal` enum	Event dispatched to a machine’s handler
Console	`CollectorHandler`	Test utility that captures messages (like a virtual console)
QUERY NAMES	`supervisor.query_names()`	List all running machines