🚀 go-pugleaf

Dear all :

This is my first time reading these groups, and it looks like someone
should be able to answer my question pretty handily :

I am trying to write to auxiliary files, similar to a 
  foo.aux

My problem is that I do NOT want to overwrite the old file, I just wish to
append to it (as in UNIX's >> direction.)  Is there a cheap way to do
this ?  It seems that the
  \newwrite\filename
  \openout\filename=foo.awx
commands remove the old file foo.awx so that a
  \write\filename{stuff}
overwrites the old file.  

I can get around my problem in 3 ways :
1) write to a whole bunch of different aux files
2) define a bunch of macros each time I run TeX, and rewrite the
entire file at the end of the run, or
3) read the original file a line at a time and rewrite to a temp file,
and then manipulate filenames ...

At the moment I am doing (1), as the others are clumsy, but I am
trying to avoid a proliferation of files (i'm heading for about 80 or
so already, each one line long !)

Any ideas will be greatly appreciated.

Many thanks,

robin

PS : i'd prefer an e-mail reply to :  young@ams.sunysb.edu