Creates a subprocess.

Format
 SPAWN [command-string]

 Requires TMPMBX or PRMMBX user privilege.

 The SPAWN and ATTACH commands cannot be used if your terminal has an
 associated mailbox.

Additional information available:

ParametersQualifiers

command-string
 A command string of less than 132 characters that is to be executed in
 the context of the created subprocess. When the command completes
 execution, the subprocess terminates and control returns to the parent
 process. If both a command string and the /INPUT qualifier are
 specified, the specified command string executes before additional
 commands are obtained from the /INPUT qualifier.

Additional information available:

/CARRIAGE_CONTROL/CLI/INPUT/KEYPAD/LOG/LOGICAL_NAMES
/NOTIFY/OUTPUT/PROCESS/PROMPT/SYMBOLS/TABLE/WAIT

 /NOCARRIAGE_CONTROL
 Prefixes carriage return/line feed characters to the subprocess's
 prompt string. The default is the parent process's setting.

 /NOCLI
 Specifies the command language interpreter (CLI) that will be used by
 the subprocess. The default CLI is that defined in SYSUAF. If you
 specify /CLI, context is copied to the subprocess.

 Specifies an input file containing one or more DCL commands to be
 executed by the subprocess. File type defaults to COM. Once processing
 of the input file is complete, the subprocess is terminated. If both a
 command string and the /INPUT qualifier are specified, the specified
 command string executes before additional commands are obtained from
 the /INPUT qualifier.  If none is specified, SYS$INPUT is assumed
 (in which case a SPAWN/NOWAIT is aborted if CTRL/Y is typed to
 abort something running in your parent process).

 /NOKEYPAD
 Copies keypad key definitions and the current keypad state from the
 parent process.

 /NOLOG
 Displays the assigned subprocess name and any messages indicating
 transfer of control between processes.

 /NOLOGICAL_NAMES
 Copies process logical names and logical name tables (except those
 explicitly marked CONFINE or created in executive or kernel mode) to
 the subprocess.

 /NONOTIFY (default)
 Broadcasts a message to your terminal notifying you that your
 subprocess has completed or aborted. Incompatible with the /NOWAIT
 qualifier or the execution of SPAWN from within a non-interactive
 process.

 Specifies the output file to which the results of the SPAWN operation
 are written. (Do not specify SYS$COMMAND as a file specification with
 the /NOWAIT qualifier; both parent and subprocess output will be
 displayed simultaneously on your terminal.)

 Specifies the name of the subprocess to be created. The default
 subprocess name format is: username_n.

 Specifies the prompt string for DCL to use in the subprocess. The
 default is the prompt of the parent process. The string must be
 enclosed in quotation marks if it contains spaces, special characters,
 or lowercase characters.

 /NOSYMBOLS
 Passes global and local symbols (except $RESTART, $SEVERITY, and
 $STATUS) to the subprocess.

 Specifies the name of an alternate command table to be used by the
 subprocess.

 /NOWAIT
 Requires that you wait for the subprocess to terminate before you
 issue another DCL command. The /NOWAIT qualifier allows you to issue
 new commands while the subprocess is running. (Use the /OUTPUT
 qualifier with the /NOWAIT qualifier to avoid displaying both parent
 and subprocess output on the terminal simultaneously.)