[daip] GGR and PW files

[Eric Greisen]

Vincent McIntyre writes:
 > Dear Aips-meisters
 > 
 > We have a multi-workstation install of aips, and all workstations
 > share disks with one another via nfs. The 'master' machine is called ATLAS.
 > Yesterday I inadvertently deleted these two files
 >        /AIPS/DA00/ATLAS/GRD000000;
 >        /AIPS/DA00/ATLAS/PWD000000;
 > and this resulted in all sorts of havoc. The host subdirectories in DA00 all
 > have a link to these files, e.g.
 > 
 > atlas% ls -l  /AIPS/DA00/PUPPIS/GRD000000\;
 >  lrwxrwxrwx   1 aipsmngr aipsusr       31 Jan  2 16:16
 >           /AIPS/DA00/PUPPIS/GRD000000; -> /nfs/AIPS/DA00/ATLAS/GRD000000;
 > 
 > I was able to repair things by copying /AIPS/31DEC99/SOL/GRD000000\; and
 > PWD000000\; into the right place, but I have no idea why this helped,
 > apart from allowing the symlink chain to be resolved.
 > 
 > Can you explain to me what the function of these files is please?
 > 

       The GR file is used to record "gripes" - normally now one does
not bother with that but just uses e-mail.  Note that the GRIPE verbs
actuall records in the GR file and e-mails to daip.

      The PW file is actually used - to hold passwords.  As you start
AIPS is has to look in PW to see if the requested user has a password
and if so to verify it.  With failed links the error handling might
not be sufficient to procede - on a single machine site a missing PW
will not cause a failure.  The only passord pre-recorded in the PW file
is the aips manager user 1.

You found the correct repair without our help in any case.  That is
why there is the TEMPLATE area.

Eric Greisen