RMS
Record Management Services (RMS) are a set of system services that assist application programs in processing and managing files and their contents.
List
The following are OpenVMS record management services:
| Name | Description |
|---|---|
| File Processing and File Naming Macros | |
| SYS$CLOSE | Terminates file processing and disconnects all record streams previously associated with the file |
| SYS$CREATE | Creates and opens a new file |
| SYS$DISPLAY | Returns the opened file’s attributes to the application program |
| SYS$ENTER | Enters a file name into a directory |
| SYS$ERASE | Deletes a file and removes its directory entry |
| SYS$EXTEND | Allocates additional space to a file |
| SYS$OPEN | Opens an existing file and initiates file processing |
| SYS$PARSE | Parses a file specification |
| SYS$REMOVE | Removes a file name from a directory but does not actually delete the file data; compare this with the $ERASE macro |
| SYS$RENAME | Assigns a new name to (renames) a file |
| SYS$SEARCH | Searches a directory, or possibly multiple directories, for a file name |
| Record Processing Macros | |
| SYS$CONNECT | Establishes a record stream by associating a RAB with an open file SYS$DELETE $DELETE Deletes a record from a relative or indexed file |
| SYS$DISCONNECT | Terminates a record stream by disconnecting a RAB from an open file SYS$FIND $FIND Locates the specified record, establishes it as the current record and returns the record’s RFA to the application program SYS$FLUSH $FLUSH Writes (flushes) modified I/O buffers and file attributes to the disk before closing a file |
| SYS$FREE | Unlocks all records previously locked by the record stream |
| SYS$GET | Retrieves a record from a file |
| SYS$NXTVOL | Causes processing of a magnetic tape file to continue to the next volume of a volume set |
| SYS$PUT | Writes a new record to a file |
| SYS$RELEASE | Unlocks a record pointed to by the contents of the RAB$W_RFA field |
| SYS$REWIND | Establishes the first file record as the current record |
| SYS$TRUNCATE | Truncates a sequential file |
| SYS$UPDATE | Deletes and rewrites (updates) an existing file record |
| SYS$WAIT | Awaits the completion of an asynchronous record operation |
| Block I/O Processing Macros | |
| SYS$READ | Retrieves a specified number of bytes from a file, beginning on block boundaries |
| SYS$SPACE | Positions forward or backward in a file to a block boundary |
| SYS$WRITE | Writes a specified number of bytes to a file, beginning on block boundaries |
