Defines the POSIX root for the system.

    Format

      SET ROOT  device-name:directory-spec

1 - Parameters

 device-name:directory-spec

    Defines the root pathname.

2 - Description

    In POSIX pathname processing mode, RMS and the C Run-Time Library
    treat the leading slash (/) of a pathname as referring to the
    defined root. By default, the root is SYS$SYSDEVICE:[PSX$ROOT].
    The root definition does not persist across a reboot. The SET
    ROOT commands requires SYSNAM privilege and has the following
    qualifier:

3 - Qualifier

 3.1 - /LOG

       /LOG (default)
       /NOLOG

    Controls whether the SET ROOT command displays a success
    indication after the root definition is set.

4 - Example

  $  SHOW ROOT
  DISK$ALPHASYS:[000000]
  $  SET ROOT DISK$ALPHASYS:[PSX$ROOT]
  %SET-I_SXROOSET, system POSIX root set to DISK$ALPHASYS:[PSX$ROOT]
  $ SHOW ROOT
  DISK$ALPHASYS:[PSX$ROOT]
  $

      The SHOW ROOT command in this example displays the current root
      path. The SET ROOT command changes these defaults, and the next
      SHOW ROOT command displays the new default root.