Environment variables
     As requested by the RCF staff at BNL, the input and output file for PHOBOS  data analysis are determined by the environment variables INPUT0 and OUTPUT0 which are set to point to actual files by the scripts controlling HPSS access to the Managed Data Store (tape robots etc.).  The same approach is used in phat.C for other files such as templates. In some of the MDC1 operations other environment variables such as pointers to the farm processor name were added for information in the output log. Finally, BROWSER should be set to point to e.g. Netscape and PHATHELP contains a command line for bringing up this HELP. Here is an example from .cshrc on phowl.chm.bnl.gov:
setenv BROWSER /usr/lib/netscape/netscape-communicator
setenv PHATHELP $BROWSER\ $PHATHOME/phatloop/html/phatic.html
setenv INPUT0 $PHATHOME/data/cvr_001.root 
setenv OUTPUT0 $PHATHOME/data/cvr_001output.root 
setenv TEMPLATES $PHATHOME/data/templN_350_700_44_46pix.root