A.7.2 Yohkoh environmental configuration files

The Yohkoh OS and IDL environment is established through the execution of several Unix script (or VMS command) files and IDL startup files. A single script acts to control the flow of script and setup execution. In some cases, multiple versions of scripts may exist in a general, site, and personal areas to allow customization according to the following execution order.

   Type         Path                    Function
1) GEN      $ys/gen/setup       setup default Yohkoh environment
2) SITE     $ys/site/setup      allow site modifications to the above
3) PERS     $HOME               allow personal modifications to the above

The files described below are used to configure the Yohkoh environment. Files for which a SITE version is maintained may be used by the site Yohkoh Software manager to customize the site environment. If no site version currently exists, the corresponding file from gen ($ys/gen/setup) may be used as an example or template (ie, copy to $ys/site/setup and edit). Note that files in SITE are not overwritten by a Yohkoh Software upgrade so site changes are not clobbered (unless requested).

File                    Function                         GEN    SITE    PERS

idl_setup       control flow of setup execution         yes     no      no
setup_paths     set top level database locations        yes(1)  yes     no
setup_dirs      define specific database paths          yes     yes     no
setup_alias     define OS symbols / aliases             yes     yes     no
setup_mail      define mailing list env                 yes     yes     no
setup_ysenv     other env/alias customization           yes     yes     yes
IDL_STARTUP     define Yohkoh IDL environment           yes     yes(2)  yes(3)

1. the version in gen is not executed - it is provided as a template for site managers (some internal documentation)
2. The file $ys/site/setup/IDL_STARTUP (maintained by the site manager) is executed if it exists.
3. If user has the $IDL_STARTUP environmental defined, it will be executed following the Yohkoh-wide IDL_STARTUP. See the IDL manual for a description of IDL_STARTUP.