VX/RMS - SYS$ Routines for RMS

Overview

VX/RMS is a call-compatible library for migrating VMS / OpenVMS RMS applications to Linux and Windows without requiring source code changes. It provides full support for all VMS / OpenVMS file types, access modes, record formats, and file locking mechanisms.

By implementing the SYS$ API set, VX/RMS ensures seamless compatibility, allowing programs to function identically on Linux as they did on VMS / OpenVMS.

Key Features of VX/RMS

Feature	Description
Full RMS Compatibility	Supports all VMS / OpenVMS RMS file types, including Indexed, Relative, Sequential, and Block mode files.
Identical SYS$ API Support	Implements VMS SYS$ API calls, enabling direct portability of applications.
File & Record Locking	Retains VMS / OpenVMS record-locking mechanisms and supports enhanced Linux/Windows locking standards.
Keyed Indexed Files	Provides full support for indexed file operations with up to 32 keys per file and various key types.
VMS Logical Name & File Spec Support	Translates VMS-style file paths and logicals into Linux / Windows equivalents automatically.
Data Integrity & Reuse	Supports optional re-use of deleted records, reducing the need for file reorganization.
Error Code Mapping	Converts Linux / Windows error codes to their corresponding VMS RMS equivalents (e.g., `ENOFILE` → `RMS$_FNF`).

VX/RMS SYS$ Call-Compatible Libraries for Linux

VX/RMS fully supports the SYS$ API calls, ensuring complete compatibility with existing VMS / OpenVMS applications.

Supported SYS$ API Functions

• SYS$FREE

• SYS$GET

• SYS$OPEN

• SYS$PARSE

• SYS$PUT

• SYS$READ

• SYS$RELEASE

• SYS$RENAME

• SYS$REWIND

• SYS$SEARCH

• SYS$TRUNCATE

• SYS$UPDATE

• SYS$WAIT

• SYS$WRITE

Supported FDL Call-Compatible Libraries

• ANALYZE/FDL

• CREATE/FDL

• FDL$CREATE

• FDL$GENERATE

• FDL$PARSE

• FDL$RELEASE

Why Choose VX/RMS?

✅ Seamless migration of VMS / OpenVMS RMS applications

✅ Identical behavior on Linux & Windows with full SYS$ API support

✅ Maintains file integrity, locking, and record access models

✅ Automatic file specification and logical name translation

✅ Eliminates the need for extensive application rewrites

VX/RMS provides a complete, drop-in replacement for VMS / OpenVMS RMS, ensuring applications continue to function without modification while taking advantage of modern Linux and Windows environments.