VMS Help DTM, ATTACH  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   Switches control from your current process to another process in
   your job.

   Format

     ATTACH  [process-name] [/qualifier]

1 - Command Qualifiers

 1.1 - /IDENTIFICATION

   /IDENTIFICATION=pid

   Specifies the process identification (PID) of the process to which
   you want to attach your terminal. You can omit the leading zeros
   when you specify a PID.

   If you specify the /IDENTIFICATION qualifier, do not specify the
   process name parameter or the /PARENT qualifier. If you do not
   specify a qualifier, you must specify a process name.

 1.2 - /PARENT

   Specifies that the process you want to attach to is your original
   (parent) process.

   If you specify the /PARENT qualifier, do not specify the process
   name parameter or the /IDENTIFICATION qualifier. If you do not
   specify a qualifier, you must specify a process name.

2 - Example

   MAIL> SPAWN DTM
     .
     .
     .
   DTM> ATTACH/PARENT
   You have 0 new messages.

   MAIL>

   This example uses the OpenVMS Mail Utility (MAIL) command SPAWN
   to create a subprocess running Digital Test Manager. The Digital Test
   Manager ATTACH command is then used to attach the terminal back
   to the MAIL session, the parent process.