The ATTACH subcommand transfers control from the current process
    (which then hibernates) to the specified process.

    Format

      DEFRAGMENT ATTACH  { process-name } [ /QUALIFIERS ]

1 - Parameters

 process-name

    The process-name specifies the name of a process to which control
    transfers. The process must already exist, be part of your
    current job, and share the same input stream as your current
    process. However, the process cannot be your current process or a
    subprocess created with the /NOWAIT qualifier.

    Process names can contain from 1 to 15 alphanumeric characters.
    If a connection to the specified process cannot be made, an error
    message is displayed.

2 - Restrictions

    o  The ATTACH command cannot be used if your terminal has an
       associated mailbox.

    o  You cannot use the process-name parameter with the
       /IDENTIFICATION qualifier.

    o  You must supply either a process name or a PID for this
       command.

3 - Qualifiers

 3.1 - /IDENTIFICATION

       /IDENTIFICATION=pid

          /IDENTIFICATION lets you specify the process
          identification (PID) of the process to which terminal
          control will be transferred. Leading zeros can be
          omitted.

4 - Examples

      The following are examples of the ATTACH command:

    1.$ DEFRAGMENT ATTACH JONES_2

      This ATTACH command transfers the terminal's control to the
      subprocess named JONES_2.

    2.$ DEFRAGMENT ATTACH /IDENTIFICATION=2A401A1B

      This ATTACH command switches control from the current process
      to the process whose PID is 2A401A1B.