Article 133366 of comp.os.vms:
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From: jonathan@ucsvc.ucs.unimelb.edu.au (Jonathan Ridler)
Newsgroups: comp.os.vms,vmsnet.alpha
Subject: "BECOME" for VAX and Alpha in Pascal.
Date: 6 Nov 95 12:01:29 +1100
Organization: The University of Melbourne
Lines: 67
Message-ID: <1995Nov6.120129@ucsvc.ucs.unimelb.edu.au>
NNTP-Posting-Host: hermes.ucs.unimelb.edu.au
Xref: nntpd.lkg.dec.com comp.os.vms:133366 vmsnet.alpha:3505

Some time ago I rewrote our local version of BECOME as part of migrating
to Alpha.  I eliminated all Macro in the process, writing entirely in
Pascal.  The program works on both VAX and Alpha and would be easily
extended to modify other elements of the user's process.  I am happy to
make JUMP (as I call it) available if there is interest.  The HELP file
follows.

Jonathan.
--------------------------------------------------------------------------------
Jonathan Ridler (VMS Systems Manager)       Information Technology Services,
Telephone:  +61 3 9344 7994                 The University of Melbourne,
Fax:        +61 3 9347 4803                 Thomas Cherry Building,
Email: jonathan@unimelb.edu.au              Parkville, Vic., AUSTRALIA, 3052.
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1 JUMP

JUMP is a program which allows selected users (Operators and Systems
Programmers) to change elements of their process to those of another user.
Limitations are placed on non-Systems Programmers: they cannot target users
who have more than a certain set of privileges and they cannot change
username.

Items which are changed to those of the target user are:

  Username (Systems Programmers only, using the SETUSER or ALL qualifier)

  UIC, Default Directory, Default Disk, LNM$GROUP.

Privileges are NOT changed.


The syntax of the JUMP command is

  $ JUMP [username] [qualifiers]

2 Parameter
JUMP takes a single optional parameter of a username.  This is the username
which will be used (after validation) as the target user to which to change.

If no username is specified, the username is defaulted to the current
username of the process.  Systems Programmers may set their username to one
which is not in the UAF using the OVERRIDE_UAF qualifier.

2 Qualifiers
/ALL
 /[NO]ALL

Use of /ALL is restricted to Systems Programmers.  It causes all "normal"
actions of JUMP _and_ the action of the SETUSER qualifier.

/LOG
 /[NO]LOG

By default, successful changes are logged to SYS$OUTPUT.  Use /NOLOG to
change "quietly"!

/OVERRIDE_UAF
 /[NO]OVERRIDE_UAF

Systems Programmers may use this qualifier to set their username to one
which is not in the UAF.

/SETUSER
 /[NO]SETUSER

Systems Programmers may use this qualifier to change their username ONLY.